U.S. flag

An official website of the United States government

Dot gov

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Https

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

PubAg

Main content area

You searched for: Subject term desorption Remove constraint Subject term: desorption
Start Over

Search

20,520  Search Results

« Previous | 1 - 100 of 20,520 |
Number of results to display per page

Search Results

1. "MALDI-CSI": A proposed method for the tandem detection of human blood and DNA typing from enhanced fingermarks

Author:
Katie Kennedy; Ravell Bengiat; Cameron Heaton; Yael Herman; Carla Oz; Michal Levin Elad; Laura Cole; Simona Francese
Source:
Forensic science international 2021 v.323 pp. 110774
ISSN:
0379-0738
Subject:
DNA; blood; desorption; digestion; forensic sciences; hemoglobin; humans; mass spectrometry; peptides; proteomics
Abstract:
... Matrix Assisted Laser Desorption Ionization Mass Spectrometry Profiling and Imaging (MALDI MSP and MALDI MSI), in combination with bottom up proteomics, have proven to successfully detect and map blood-derived peptide signatures in blood fingermarks, with high specificity and compatibility with a number of blood enhancement techniques (BET). In the present study, the application of MALDI MSP and M ...
DOI:
10.1016/j.forsciint.2021.110774

2.   Copper release kinetics: Effect of two extractants and wheat (Triticum aestivum L.) rhizosphere

Author:
H.R. Motaghian; A.R. Hosseinpur
Source:
Plant, Soil and Environment v.58 no.10 pp. 471-476
ISSN:
1214-1178
Subject:
Triticum aestivum; citric acid; desorption; environment; greenhouse experimentation; rhizosphere; wheat
Abstract:
... The greenhouse experiment was performed to determine Cu release characteristics in the bulk and the rhizosphere of some calcareous soils using rhizobox. The kinetics of Cu release in the bulk and the rhizosphere soils were determined by successive extraction with diethylenetriaminepentaacetic acid-triethanolamine (DTPA-TEA) and 10 mmol/L citric acid in a period of 1 to 504 h at 25 ± 1°C ...
DOI:
10.17221/365/2012-pse

3. 'GAB' generalised equation as a basis for sorption spectral analysis

Author:
J. Blahovec; S. Yanniotis
Source:
Czech Journal of Food Sciences v.28 no.5 pp. 345-354
ISSN:
1805-9317
Subject:
desorption; equations; gelatinization; hydrolysis; potatoes; resorption; sorption isotherms; spectral analysis; starch; water activity; water content; wheat
Abstract:
... The transformed sorption isotherm (represented by the ratio of water activity and moisture content (d.b.) versus water activity) was approximated by polynomials of 2nd–6th order. It is shown that the relative derivative of the transformed equation expresses the deviation of the sorption isotherm from the linear relationship between the moisture content and water activit ...
DOI:
10.17221/146/2009-cjfs

4. (1→3)-β-d-Glucan oligosaccharides monomers purification and its H2O2 induction effect study

Author:
Yunbin Fu; Mengyu Wang; Wenxia Wang; Yaqin Tuo; Zhimou Guo; Yuguang Du; Heng Yin
Source:
International journal of biological macromolecules 2015 v.81 pp. 1069-1073
ISSN:
0141-8130
Subject:
bioactive properties; desorption; hydrogen peroxide; hydrophilic interaction chromatography; ionization; matrix-assisted laser desorption-ionization mass spectrometry; oligosaccharides; polymerization; tobacco
Abstract:
... In order to produce highly purified (1→3)-β-d-glucan oligosaccharides ((1→3)-β-d-GOS) monomers, a hydrophilic interaction liquid chromatography (HILIC) system with X-Amide stationary phase was performed. Nine (1→3)-β-d-GOS monomers with degree of polymerization (DP) from 2 to 10 were successfully separated. Matrix-assisted laser desorption/ionization time of flight mass spectrometry (MALDI-TOF-MS) ...
DOI:
10.1016/j.ijbiomac.2015.09.028

5. (Quasi-) 2D Aggregation of Polystyrene-b-Dextran at the Air–Water Interface

Author:
Bosker Wouter T. E.; Cohen Stuart Martien A.; Norde Willem
Source:
Langmuir 2013 v.29 no.8 pp. 2667-2675
ISSN:
1520-5827
Subject:
brushes; composite polymers; desorption; dextran; ethylene oxide; hydrogen bonding; hydrophilicity; hydrophobicity; hysteresis; micelles; surfactants; van der Waals forces
Abstract:
... Polystyrene-b-dextran (PS-b-Dextran) copolymers can be used to prepare dextran brushes at solid surfaces, applying Langmuir–Blodgett deposition. When recording the interfacial pressure versus area isotherms of a PS-b-Dextran monolayer, time-dependent hysteresis was observed upon compression and expansion. We argue that this is due to (quasi-) 2D aggregation of the copolymer at the air–water surfac ...
DOI:
10.1021/la304797r

6. (Zn, Ni, Cu)-BTC Functionalized with Phosphotungstic Acid for Adsorptive Desulfurization in the Presence of Benzene and Ketone

Author:
Wei Dai; Ning Tian; Congmin Liu; Le Yu; Qing Liu; Na Ma; Yuexing Zhao
Source:
Energy & fuels 2017 v.31 no.12 pp. 13502-13508
ISSN:
1520-5029
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; acetone; adsorbents; adsorption; atomic absorption spectrometry; benzene; coordination polymers; copper; desorption; desulfurization; fuels; nickel; nitrogen; phosphotungstic acid; scanning electron microscopy; zinc
Abstract:
... A novel composite adsorbent, PTA@(Zn, Ni, Cu)-BTC, was prepared by (Zn, Ni, Cu)-BTC doped with different amounts of phosphotungstic acid (PTA) using an impregnation method. Apparatus like nitrogen adsorption–desorption, X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier transform infrared (FT-IR), inductively coupled plasma optical emission spectroscopy (ICP-OES), and NH₃-tempera ...
DOI:
10.1021/acs.energyfuels.7b02851

7. 1,3-Dimethylurea Tetrabutylphosphonium Bromide Ionic Liquids for NO Efficient and Reversible Capture

Author:
Jiang Bin; Lin Weiren; Zhang Luhong; Sun Yongli; Yang Huawei; Hao Li; Tantai Xiaowei
Source:
Energy & Fuels 2016 v.30 no.1 pp. 735-739
ISSN:
1520-5029
Subject:
Fourier transform infrared spectroscopy; absorption; atmospheric pressure; desorption; ionic liquids; nitric oxide; nuclear magnetic resonance spectroscopy; solubility; stable isotopes; temperature
Abstract:
... To explore environmentally friendly and benign solvents to capture NO gas, a series of ionic liquids was newly synthesized by 1,3-dimethylurea and tetrabutylphosphonium bromide with different mole ratios (1:1, 2:1, and 3:1). In addition, their NO absorption and desorption properties were studied at a temperature from 30 to 70 °C and atmospheric pressure for the first time. These synthesized ionic ...
DOI:
10.1021/acs.energyfuels.5b01826

8. 1,4-Phenylene Diisocyanide (PDI) Interaction with Low-Coordinated Gold Sites: Dissociation and Adsorbate-Induced Restructuring

Author:
Ahmed Ghalgaoui; Nassar Doudin; Emil Kelderer; Martin Sterrer
Source:
Journal of physical chemistry 2018 v.123 no.13 pp. 7870-7878
ISSN:
1932-7455
Subject:
adsorption; cyanides; desorption; dissociation; ferrous oxide; geometry; gold; nanogold; nanoparticles; scanning tunneling microscopy; spectroscopy
Abstract:
... The adsorption of 1,4-phenylene diisocyanide (PDI) on sputter-roughened Au(111) and FeO(111)/Pt(111)-supported Au nanoparticles of different size has been studied by vibrational sum frequency generation (SFG) spectroscopy, scanning tunneling microscopy (STM), and temperature-programmed desorption (TPD). The special step geometry of sputter-roughened Au(111) facilitates the dissociation of PDI and ...
DOI:
10.1021/acs.jpcc.8b07034

9. 1,5-Diaminonaphthalene Hydrochloride Assisted Laser Desorption/Ionization Mass Spectrometry Imaging of Small Molecules in Tissues Following Focal Cerebral Ischemia

Author:
Liu Huihui; Chen Rui; Wang Jiyun; Chen Suming; Xiong Caiqiao; Wang Jianing; Hou Jian; He Qing; Zhang Ning; Nie Zongxiu; Mao Lanqun
Source:
Analytical chemistry 2014 v.86 no.20 pp. 10114-10121
ISSN:
1520-6882
Subject:
absorption; adenosine triphosphate; amino acids; antioxidants; biomedical research; brain; brain damage; carboxylic acids; desorption; image analysis; ionization; ischemia; kidneys; liver; mass spectrometry; metabolism; metabolites; metal ions; mice; phospholipids; rats; salt tolerance; tissues; tricarboxylic acid cycle
Abstract:
... A sensitive analytical technique for visualizing small endogenous molecules simultaneously is of great significance for clearly elucidating metabolic mechanisms during pathological progression. In the present study, 1,5-naphthalenediamine (1,5-DAN) hydrochloride was prepared for matrix-assisted laser desorption/ionization (MALDI) mass spectrometry imaging (MSI) of small molecules in liver, brain, ...
DOI:
10.1021/ac5034566

10. 1,5-Diaminonaphthalene functionalized carbon nanodots as a novel matrix for the analysis of small molecules by matrix-assisted laser desorption/ionization mass spectrometry

Author:
Yueying Zhang; Dan Gao; Shangfu Li; Weili Wei; Jinshun Lin; Yuyang Jiang
Source:
Analytical methods 2019 v.11 no.8 pp. 1131-1136
ISSN:
1759-9679
Subject:
amino acids; antineoplastic agents; carbon; desorption; detection limit; dopamine; fatty acids; mass spectrometry; nanotechnology; salt tolerance
Abstract:
... 1,5-Diaminonaphthalene functionalized carbon nanodots (DAN-CDs) were explored as a novel matrix for direct detection of small molecules by matrix-assisted laser desorption/ionization mass spectrometry (MALDI-MS) in negative ion mode. By using DAN-CDs as the matrix, we could detect not only biological small molecules such as fatty acids (FAs), amino acids, peptide Gly–Gly and dopamine, but also ant ...
DOI:
10.1039/c8ay02665c

11. 1,6-Diphenyl-1,3,5-hexatriene (DPH) as a Novel Matrix for MALDI MS Imaging of Fatty Acids, Phospholipids, and Sulfatides in Brain Tissues

Author:
Ibrahim Hanadi; Jurcic Kristina; Wang Jasmine S.-H.; Whitehead Shawn N.; Yeung Ken K.-C.
Source:
Analytical chemistry 2017 v.89 no.23 pp. 12828-12836
ISSN:
1520-6882
Subject:
brain; desorption; energy; fatty acids; fluorescent dyes; image analysis; mass spectrometry; mice; phosphatidylserines; rats; spectrometers; sublimation; tissues
Abstract:
... 1,6-Diphenyl-1,3,5-hexatriene (DPH) is a commonly used fluorescence probe for studying cell membrane-lipids due to its affinity toward the acyl chains in the phospholipid bilayers. In this work, we investigated its use in matrix-assisted laser desorption/ionization (MALDI) as a new matrix for mass spectrometry imaging (MSI) of mouse and rat brain tissue. DPH exhibits very minimal matrix-induced ba ...
DOI:
10.1021/acs.analchem.7b03284

12. 1,8-Di(piperidinyl)-naphthalene – rationally designed MAILD/MALDI matrix for metabolomics and imaging mass spectrometry

Author:
Jerrit Weißflog; Aleš Svatoš
Source:
RSC advances 2016 v.6 no.79 pp. 75073-75081
ISSN:
2046-2069
Subject:
acidity; atmospheric pressure; chemical species; desorption; image analysis; ionization; mass spectrometry; metabolomics; molecular weight; naphthalene
Abstract:
... Matrix-assisted laser desorption/ionization mass spectrometry (MALDI-MS) of small molecules requires special matrices, which do not generate interfering signals below m/z 500. Here, we present 1,8-di(piperidinyl)naphthalene (DPN), a new matrix that is suitable for analytes of low molecular weight in negative ion mode and that does not generate such signals. This compound was rationally designed fr ...
DOI:
10.1039/c6ra17237g

13. 1-Octyl-3-methylimidazolium hexafluorophosphate-functionalised magnetic poly β-cyclodextrin for magnetic solid-phase extraction ofpyrethroids from tea infusions

Author:
Qinqin Xu; Zikai Liu; Chen Yan; Runhua Lu; Wenfeng Zhou
Source:
Food additives & contaminants 2021 v.38 no.10 pp. 1743-1754
ISSN:
1944-0057
Subject:
Fourier transform infrared spectroscopy; X-ray photoelectron spectroscopy; chemical species; desorption; energy-dispersive X-ray analysis; ionic strength; magnetism; pyrethrins; solid phase extraction; sorbents; tea; transmission electron microscopy
Abstract:
... In this study, a novel sorbent, 1-octyl-3-methylimidazolium hexafluorophosphate functionalised magnetic poly β-cyclodextrin, was successfully synthesised and applied to magnetic solid-phase extraction for the determination of pyrethroids in tea infusions. The sorbent was characterised by transmission electron microscopy, energy-dispersive spectroscopy, Fourier transform infrared spectroscopy, X-ra ...
DOI:
10.1080/19440049.2021.1943004

14. 110th Anniversary: Syngas Production Enhancement Using Calcium- and Potassium-Impregnated Chars

Author:
Marion Ducousso; Elsa Weiss-Hortala; Nathalie Lyczko; Ange Nzihou; Marco J. Castaldi
Source:
Industrial & engineering chemistry process design and development 2019 v.58 no.33 pp. 15134-15141
ISSN:
1520-5045
Subject:
Populus; active sites; biomass; byproducts; calcium; carbon monoxide; catalysts; catalytic activity; cracking; desorption; gasification; hydrogen; methane; moieties; potassium; process design; silicates; silicon; synergism; synthesis gas; wood products
Abstract:
... Syngas production enhancement via catalytic methane cracking onto metal-loaded chars, with a specific focus on the activity of two inherent alkali and alkaline earth metals (AAEMs), Ca and K, was investigated. Chars produced from the gasification of poplar wood pellets were heated to 700 °C in an inert atmosphere and then tested as catalysts for methane cracking at 700 °C. Methane is one of the mo ...
DOI:
10.1021/acs.iecr.9b02238

15. 137 dynamic shift in cytoplasmic lipids in cat oocytes during ovarian follicle development

Author:
C. Thongkittidilok; Y. Li; D. Wildt; N. Songsasen
Source:
Reproduction, fertility, and development 2016 v.28 no.2 pp. 198-199
ISSN:
1031-3613
Subject:
Felidae; cats; computer software; databases; desorption; developmental stages; embryogenesis; follicular development; glycerophosphates; goats; granulosa cells; in vitro culture; lipid composition; mass spectrometry; oocytes; principal component analysis; rats; spaying; species identification; temporal variation; viability; Western Australia
Abstract:
... Cytoplasmic lipids play key roles during oocyte and embryo development. However, there is little information on the changes in lipid types during intraovarian follicular and oocyte growth. Here, we used matrix-assisted laser desorption ionization-time of flight (MALDI-TOF) mass spectrometry to understand lipid composition in the cat oocyte during differing stages of folliculogenesis. Follicles at ...
DOI:
10.1071/RDv28n2Ab136

16. 13C signatures of aerosol organic and elemental carbon from major combustion sources in China compared to worldwide estimates

Author:
Peng Yao; Ru-Jin Huang; Haiyan Ni; Norbertas Kairys; Lu Yang; Harro A.J. Meijer; Ulrike Dusek
Source:
Science of the total environment 2022 v.810 pp. 151284
ISSN:
0048-9697
Subject:
aerosols; coal; combustion; desorption; environment; organic carbon; temperature; traffic; China
Abstract:
... Carbon isotope signatures are used to gain insight into sources and atmospheric processing of carbonaceous aerosols. Since elemental carbon (EC) is chemically stable, it is possible to apportion the main sources of EC (C3/C4 plant burning, coal combustion, and traffic emissions) using a dual ¹⁴C-¹³C isotope approach. The dual-isotope source apportionment crucially relies on accurate knowledge of ¹ ...
DOI:
10.1016/j.scitotenv.2021.151284

17. 144 Kinetics of hyperactive and moderate antifreeze proteins

Author:
Ran Drori; Yeliz Celik; Peter L. Davies; Ido Braslavsky
Source:
Cryobiology 2013 v.67 no.3 pp. 439
ISSN:
0011-2240
Subject:
Choristoneura fumiferana; Tenebrio molitor; adsorption; antifreeze proteins; bacteria; binding proteins; crystals; desorption; exposure duration; fish; food industry; freezing point; fungi; hysteresis; ice; insects; mechanism of action; medicine; melting point; models; plants (botany); temperature
Abstract:
... Ice binding proteins (IBPs) protect cold-adapted organisms from freeze injuries by inhibiting the growth of endogenous ice crystals. IBPs have been found in fish, insects, plants, fungi and bacteria, and hold great potential in different fields such as the food industry, medicine and agriculture. IBPs include antifreeze proteins (AFPs), which adsorb to the surface of ice crystals and lower the tem ...
DOI:
10.1016/j.cryobiol.2013.09.150

18. 15N Solid State NMR Spectroscopic Study of Surface Amine Groups for Carbon Capture: 3-Aminopropylsilyl Grafted to SBA-15 Mesoporous Silica

Author:
Daphna Shimon; Chia-Hsin Chen; Jason J. Lee; Stephanie A. Didas; Carsten Sievers; Christopher W. Jones; Sophia E. Hayes
Source:
Environmental science & technology 2018 v.52 no.3 pp. 1488-1495
ISSN:
1520-5851
Subject:
amines; ammonium; carbon; carbon dioxide; desorption; environmental science; moieties; nitrogen; nuclear magnetic resonance spectroscopy; porous media; silica; solids; sorbents; spectral analysis; stable isotopes
Abstract:
... Materials composed of high-porosity solid supports, such as SBA-15, containing amine-bearing moieties inside the pores, such as 3-aminopropylsilane (APS), are envisioned for carbon dioxide capture; solid-state ¹⁵N NMR can be highly informative for studying chemisorption reactions. Two ¹⁵N-enriched samples with different APS loadings were studied to probe the identity of the pendant molecules and s ...
DOI:
10.1021/acs.est.7b04555

19. 1D/2D nitrogen-doped carbon nanorod arrays/ultrathin carbon nanosheets: outstanding catalysts for the highly efficient electroreduction of CO₂ to CO

Author:
Ying Zhu; Kuilin Lv; Xingpu Wang; Hequn Yang; Guozheng Xiao
Source:
Journal of materials chemistry A 2019 v.7 no.24 pp. 14895-14903
ISSN:
2050-7496
Subject:
Gibbs free energy; acid treatment; aniline; calcium gluconate; carbon; carbon dioxide; carbon monoxide; catalysts; desorption; durability; electrochemistry; energy efficiency; greenhouse effect; nanorods; nanosheets; polymerization; pyrolysis; surface area; thermal expansion; value added
Abstract:
... The electroreduction of carbon dioxide (CO₂) to value-added chemicals is a promising strategy for alleviating both the greenhouse effect and the energy crisis. However, conventional electrocatalysts generally suffer from low energy efficiency and poor product selectivity and durability. Herein, one/two-dimensional nitrogen-doped carbon nanorod arrays/ultrathin carbon nanosheet catalysts (1D/2D NR/ ...
DOI:
10.1039/c9ta02353d

20. 1H-Pteridine-2,4-dione (lumazine): a new MALDI matrix for complex (phospho)lipid mixtures analysis

Author:
Calvano, Cosima D.; Carulli, Saverio; Palmisano, Francesco
Source:
Analytical and bioanalytical chemistry 2010 v.398 no.1 pp. 499-507
ISSN:
1618-2642
Subject:
2,5-dihydroxybenzoic acid; absorption; cations; desorption; eggs; hens; ionization; mass spectrometry; milk; phosphatidylcholines; phosphatidylethanolamines; phosphatidylglycerols; phosphatidylinositols; phosphatidylserines; soymilk; sphingomyelins
Abstract:
... Nowadays, matrix-assisted laser desorption/ionization (MALDI) time-of-flight mass spectrometry represents an emerging and versatile tool for analysis of lipids. However, direct (i.e., with no previous separation of lipid classes) analysis of crude extracts containing a complex mixture of lipids (a problem typically encountered in shotgun lipidomics) is still a quite challenging task using a conven ...
DOI:
10.1007/s00216-010-3927-x
PubMed:
20593166

21. 2,3,4,5-Tetrakis(3′,4′-dihydroxylphenyl)thiophene: A New Matrix for the Selective Analysis of Low Molecular Weight Amines and Direct Determination of Creatinine in Urine by MALDI-TOF MS

Author:
Chen Suming; Chen Li; Wang Jianing; Hou Jian; He Qing; Liu Jian’an; Wang Jiyun; Xiong Shaoxiang; Yang Guoqiang; Nie Zongxiu
Source:
Analytical chemistry 2012 v.84 no.23 pp. 10291-10297
ISSN:
1520-6882
Subject:
allantoin; alloxan; amines; cost effectiveness; creatinine; desorption; humans; ionization; metabolites; molecular weight; quantitative analysis; tandem mass spectrometry; thiophene; urine
Abstract:
... Small organic matrixes are still the most commonly used ones in matrix-assisted laser desorption/ionization mass spectrometry (MALDI MS) because of their advantages of high sensitivity, convenience, and cost-effectiveness. However, due to the matrix interference in the low mass region, the direct analysis of low molecular weight amines in complex surroundings with conventional organic matrixes rem ...
DOI:
10.1021/ac3021278

22. 2,4-D mobility in clay soils: Impact of macrofauna abundance on soil porosity

Author:
B. Prado; A. Gastelum Strozzi; E. Huerta; C. Duwig; O. Zamora; P. Delmas; D. Casasola; J. Márquez
Source:
Geoderma 2016 v.279 pp. 87-96
ISSN:
0016-7061
Subject:
2,4-D; adsorption; aerobic conditions; aluminum; aluminum oxide; aquifers; buffering capacity; burrows; clay; clay fraction; clay soils; computed tomography; computer analysis; desorption; earthworms; groundwater contamination; half life; image analysis; iron; leaching; metabolites; organic matter; porosity; preferential flow; risk; soil analysis; soil structure; solutes; water quality; Mexico
Abstract:
... Pesticides in agriculture are commonly used to meet the growing food demand; however they compromise the quality of water and soil. The pesticide 2,4-D is one of the most widely used herbicides in the world, it belongs to the group of synthetic herbicides that control broadleaf weeds. In this paper the risk of groundwater contamination by 24-D and its major metabolite, 2,4-DCP, is studied in a con ...
DOI:
10.1016/j.geoderma.2016.06.007

23. 2,4-Dichlorophenol removal in a solid–liquid two phase partitioning bioreactor (TPPB): kinetics of absorption, desorption and biodegradation

Author:
M. Concetta Tomei; M. Cristina Annesini; Andrew J. Daugulis
Source:
New biotechnology 2012 v.30 no.1 pp. 44-50
ISSN:
1871-6784
Subject:
2,4-dichlorophenol; absorption; biodegradation; biomass; bioreactors; cytotoxicity; desorption; diffusivity; equations; polymers; wastewater
Abstract:
... The applicability of a sequencing batch two phase partitioning bioreactor (TPPB) to the biodegradation of a highly toxic compound, 2,4-dichlorophenol (DCP) (EC₅₀=2.3–40mgL⁻¹) was investigated. A kinetic study of the individual process steps (DCP absorption into the polymer, desorption and biodegradation) was performed and, based on favourable absorption/desorption characteristics (DCP diffusivity ...
DOI:
10.1016/j.nbt.2012.07.010

24. 2,4-Dichlorophenoxyacetic acid (2,4-D) photodegradation on WO3-TiO2-SBA-15 nanostructured composite

Author:
Laíse M. Carvalho; Antônio F. Soares-Filho; Maciel S. Lima; João F. Cruz-Filho; Taisa C. M. Dantas; Geraldo E. Luz Jr
Source:
Environmental science and pollution research international 2021 v.28 no.7 pp. 7774-7785
ISSN:
0944-1344
Subject:
2,4-D; adsorption; air; biomass; desorption; irradiation; photocatalysis; photolysis; pollution; porous media; public health; reflectance; remediation; research; soil; titanium dioxide; ultraviolet radiation
Abstract:
... A current environmental problem is the uncontrolled use of various pesticides that are harmful to the environment and public health. The herbicide 2,4-D is widely used, making it a vector of contamination for aquatic bodies, air, soil, and biomass. In recent decades, researchers have studied remediation of this compound in the environment. In this work, WO₃ and TiO₂ were supported on SBA-15 molecu ...
DOI:
10.1007/s11356-020-11085-4

25. 2,4‐D and 2,4‐D butoxyethyl ester behavior in Eurasian and hybrid watermilfoil (Myriophyllum spp.)

Author:
Mirella F Ortiz; Marcelo RA Figueiredo; Scott J Nissen; Ryan M Wersal; William A Ratajczyk; Franck E Dayan
Source:
Pest management science 2022 v.78 no.2 pp. 626-632
ISSN:
1526-498X
Subject:
2,4-D; Myriophyllum spicatum; absorption; bioaccumulation; desorption; hybrids; metabolism
Abstract:
... BACKGROUND: Hybrid watermilfoil is becoming more prevalent in many lakes where the invasive Eurasian (Myriophyllum spicatum, EWM) and native northern watermilfoil (M. sibiricum) co‐occur. These Eurasian and northern watermilfoil hybrids (HWM) grow 30% faster and in many cases are less sensitive to 2,4‐dichlorophenoxy acetic acid (2,4‐D) than either parent. The mechanism(s) impacting 2,4‐D toleranc ...
DOI:
10.1002/ps.6671

26. 2-(2-Aminoethylamino)-5-nitropyridine as a basic matrix for negative-mode matrix-assisted laser desorption/ionization analysis of phospholipids

Author:
Lorkiewicz, Pawel; Cecilia Yappert, M.
Source:
Journal of mass spectrometry 2009 v.44 no.1 pp. 137-143
ISSN:
1076-5174
Subject:
2,5-dihydroxybenzoic acid; automation; desorption; ethanolamine; ionization; mass spectrometry; mixtures; phosphatidylcholines; phosphatidylserines; soybeans; sphingomyelins; zwitterions
Abstract:
... Fast and easy analysis of phospholipids (PLs) by matrix-assisted laser desorption/ionization mass spectrometry (MALDI-MS) has been well demonstrated. However, when using common organic matrices, such as 2,5-dihydroxybenzoic acid (DHB), the detection of most PL classes in positive-ion mode is difficult when PLs containing zwitterionic groups, such as phosphatidylcholines (PCs) and sphingomyelins (S ...
DOI:
10.1002/jms.1483

27. 2-Amino-2-methyl-1-propanol based non-aqueous absorbent for energy-efficient and non-corrosive carbon dioxide capture

Author:
Lv Bihong; Yang Kexuan; Zhou Xiaobin; Zhou Zuoming; Jing Guohua
Source:
Applied energy 2020 v.264 pp. 114703
ISSN:
0306-2619
Subject:
absorbents; absorption; amines; carbamates; carbon; carbon dioxide; corrosion; desorption; energy conservation; energy efficiency; enthalpy; ethanolamine; heat; nuclear magnetic resonance spectroscopy; pyrrolidones; solvents; stable isotopes; volatilization
Abstract:
... The large-scale deployment of carbon dioxide (CO₂) capture using aqueous amines is mainly limited by its intensive energy penalty. In this regard, non-aqueous amine solutions have high energy-saving potential because organics have lower heat capacity and vaporization enthalpy than water. In this study, 2-amino-2-methyl-1-propanol (AMP) coupled with activators in an inert organic solvent (N-methyl ...
DOI:
10.1016/j.apenergy.2020.114703

28. 2-Aminothiazole Functionalized Polystyrene for Selective Removal of Au(III) in Aqueous Solutions

Author:
Xiong Chunhua; Zhou Suguo; Liu Xiaozheng; Jia Qian; Ma Chunan; Zheng Xuming
Source:
Industrial & Engineering Chemistry Research 2014 v.53 no.6 pp. 2441-2448
ISSN:
1520-5045
Subject:
X-ray photoelectron spectroscopy; adsorption; aqueous solutions; cadmium; chelation; chlorides; cobalt; copper; desorption; engineering; gold; infrared spectroscopy; ions; models; nickel; nitrogen; polystyrenes; sorption isotherms; sulfur; thiourea
Abstract:
... A new chelating resin, polystyrene-2-aminothiazole (PS-AT), was synthesized via one-step reaction by grafting 2-aminothiazole in a chloromethylated polystyrene polymer. Its structure was characterized by elemental analysis and infrared spectroscopy. Batch experiments were applied to investigate the adsorption properties of PS-AT for Au(III) ions. The resin exhibits an excellent selectivity for Au( ...
DOI:
10.1021/ie403502r

29. 2-DE-MS based proteomic investigation of dairy cows with footrot

Author:
Jiasan Zheng; Shi Shu; Cheng Xia; Chuang Xu; Hongyou Zhang; Hongbin Wang
Source:
Journal of Veterinary Research 2016 v.60 no.1 pp. 63-69
ISSN:
2450-8608
Subject:
bioinformatics; blood coagulation; blood proteins; complement; dairy cows; defense mechanisms; desorption; footrot; gene ontology; inflammation; ionization; mass spectrometry; protein composition; protein synthesis; proteomics; two-dimensional gel electrophoresis
Abstract:
... Introduction: The differentially expressed proteins between healthy cows and those with footrot were identified to explore changes in protein profiles associated with the disease. Material and Methods: Out of 36 cows selected for the experiment, 18 footrot-affected cows were included in the treatment group (group T) and 18 unaffected cows were included in the control group (group C). Plasma sample ...
DOI:
10.1515/jvetres-2016-0010

30. 2-Phenyl-3-(p-aminophenyl) Acrylonitrile: A Reactive Matrix for Sensitive and Selective Analysis of Glycans by MALDI-MS

Author:
Ling Ling; Chunsheng Xiao; Yao Ma; Liyan Jiang; Sheng Wang; Liming Guo; Shimei Jiang; Xinhua Guo
Source:
Analytical chemistry 2019 v.91 no.14 pp. 8801-8807
ISSN:
1520-6882
Subject:
2,5-dihydroxybenzoic acid; aldehydes; analytical specificity; blood serum; desorption; detection limit; glycoproteins; humans; ionization; matrix-assisted laser desorption-ionization mass spectrometry; nitriles; peptides; polysaccharides; tandem mass spectrometry
Abstract:
... Analysis of glycans by matrix-assisted laser desorption/ionization mass spectrometry (MALDI-MS) is usually limited by the intrinsically low abundance and low ionization efficiency of glycans. Aiming to enhance the ionization efficiency of glycans and simplify the sample preparation procedure during MALDI-MS analysis, we reported herein a novel reactive matrix, 2-phenyl-3-(p-aminophenyl) acrylonitr ...
DOI:
10.1021/acs.analchem.9b01434

31. 2-Propanol reactivity on in situ prepared Au(111)-supported TiO₂ nanocrystals

Author:
Denis V. Potapenko; Zhisheng Li; Yang Lou; Yun Guo; Richard M. Osgood Jr.
Source:
Journal of catalysis 2013 v.297 no. pp. 281-288
ISSN:
0021-9517
Subject:
1-propanol; acetone; alloys; desorption; gold; isopropyl alcohol; nanocrystals; oxidation; propylene; scanning tunneling microscopy; temperature; titanium dioxide
Abstract:
... The reactivity of 2-propanol with TiO₂ nanocrystals supported on Au(111) was studied by temperature-programmed desorption (TPD) and scanning tunneling microscopy (STM). The nanocrystals, which are grown through oxidation of a TiAu surface alloy, had an average height of 1nm and width of 15nm with a dominantly hexagonal morphology. The desorption of propanol and propanol-derived products from the T ...
DOI:
10.1016/j.jcat.2012.10.020

32. 2D/3D Assemblies of Amine-Functionalized Graphene Silica (Templated) Aerogel for Enhanced CO₂ Sorption

Author:
Wenjing Wang; Julius Motuzas; Xiu Song Zhao; João C. Diniz da Costa
Source:
ACS applied materials & interfaces 2019 v.11 no.33 pp. 30391-30400
ISSN:
1944-8252
Subject:
aerogels; carbon dioxide; desorption; freeze drying; graphene; greenhouse gases; heat; porous media; silica; sorbents; sorption; surface area
Abstract:
... This work investigates the one-pot facile synthesis of novel 2D/3D assemblies containing graphene silica (templated) aerogel sorbents for CO₂ capture, a greenhouse gas of major global concern. In this synthesis, 3D silica (templated) aerogels were formed along the planes of 2D graphene sheets, resulting in 2D/3D assemblies of flake-like shapes. The templates were burnt off from the 2D/3D assembly, ...
DOI:
10.1021/acsami.9b07192

33. 2‐Acetyl‐1,3‐Diacyl–sn‐Glycerols with Unusual Acyl Composition in Seed Oils of the Genus Polygala

Author:
Mark A. Smith; Haixia Zhang; Ian W. Burton; Chao Liu; An‐Wei Cheng; Jin‐Yue Sun
Source:
European journal of lipid science and technology 2018 v.120 no.8 pp. e1800069
ISSN:
1438-7697
Subject:
Polygala tenuifolia; acetates; agronomic traits; biofuels; biosynthesis; desorption; genes; herbs; ingredients; lubricants; matrix-assisted laser desorption-ionization mass spectrometry; myristic acid; nuclear magnetic resonance spectroscopy; seed oils; seeds; transgenic plants; trees; triacylglycerols; very long chain fatty acids
Abstract:
... Seed oils containing unusual triacylglycerol (TAG) molecules, where one fatty acid of a TAG is substituted by an acetate group (Ac), are uncommon but of considerable interest as potential low‐viscosity biofuels and lubricants or reduced calorie food ingredients. Although the properties and pathway of biosynthesis of 3‐acetyl‐1,2‐diacyl‐sn‐glycerols (sn‐3‐acTAGs) have been described, little is know ...
DOI:
10.1002/ejlt.201800069

34. 3,4-Dimethoxycinnamic Acid as a Novel Matrix for Enhanced In Situ Detection and Imaging of Low-Molecular-Weight Compounds in Biological Tissues by MALDI-MSI

Author:
Huixin He; Liang Qin; Yawen Zhang; Manman Han; Jinming Li; Yaqin Liu; Kaidi Qiu; Xiaoyan Dai; Yanyan Li; Maomao Zeng; Huihong Guo; Yijun Zhou; Xiaodong Wang
Source:
Analytical chemistry 2019 v.91 no.4 pp. 2634-2643
ISSN:
1520-6882
Subject:
2,5-dihydroxybenzoic acid; absorption; alkaloids; brain; desorption; flavonoids; graphene oxide; image analysis; ionization; lipids; liquid chromatography; liver; metabolites; nanosilver; oligopeptides; plant tissues; rats; seeds; tandem mass spectrometry
Abstract:
... Low-molecular-weight (low-MW) compounds have many essential functions in biological processes, and the molecular imaging of as many low-MW compounds as possible is critical for understanding complex biological processes. Matrix-assisted laser desorption/ionization mass spectrometry imaging (MALDI-MSI) is an emerging molecular-imaging technology that enables determination of the spatial distributio ...
DOI:
10.1021/acs.analchem.8b03522

35. 3-Aminophthalhydrazide (Luminol) As a Matrix for Dual-Polarity MALDI MS Imaging

Author:
Bin Li; Ruiyang Sun; Andrew Gordon; Junyue Ge; Ying Zhang; Ping Li; Hua Yang
Source:
Analytical chemistry 2019 v.91 no.13 pp. 8221-8228
ISSN:
1520-6882
Subject:
2,5-dihydroxybenzoic acid; absorption; biochemical pathways; biomarkers; brain; central nervous system diseases; desorption; fatty acids; image analysis; ionization; matrix-assisted laser desorption-ionization mass spectrometry; metabolites; mice; nucleotides; sodium; sphingolipids
Abstract:
... In many aspects of the matrix-assisted laser desorption/ionization mass spectrometry imaging (MALDI MSI) technique, the discovery of new MALDI matrixes has been a major task for the improvement of ionization efficiency, signal intensity, and molecular coverage. In this work, five analog compounds, including phthalhydrazide, 3-aminophthalhydrazide (3-APH or luminol) and its sodium salt, 4-aminophth ...
DOI:
10.1021/acs.analchem.9b00803

36. 3-D phase diagram of HPC/H2O/H 3PO 4 tertiary system

Author:
Syang-Peng Rwei; Mei-Sia Lyu
Source:
Cellulose 2012 v.19 no.4 pp. 1065-1074
ISSN:
0969-0239
Subject:
desorption; interphase; solubility; temperature
Abstract:
... A 3-D phase diagram of the HPC/H2O/H3PO4 tertiary system against various temperatures was established. Four distinct phases—the completely separated phase (S), the cloudy suspension phase (CS), the liquid crystalline miscible phase (LC), and the isotropically miscible phase (I)—were identified. The S phase shrank as the temperature increased, revealing that the HPC solubility increased with temper ...
DOI:
10.1007/s10570-012-9707-3

37. 3-Helix Micelles Stabilized by Polymer Springs

Author:
Dong He; Shu Jessica Y.; Dube Nikhil; Ma Yufei; Tirrell Matthew V.; Downing Kenneth H.; Xu Ting
Source:
Journal of the American Chemical Society 2012 v.134 no.28 pp. 11807-11814
ISSN:
1520-5126
Subject:
chemical bonding; colloids; deformation; desorption; energy; hydrophilicity; micelles; nanocarriers; particle size; polyethylene glycol
Abstract:
... Despite increasing demands to employ amphiphilic micelles as nanocarriers and nanoreactors, it remains a significant challenge to simultaneously reduce the particle size and enhance the particle stability. Complementary to covalent chemical bonding and attractive intermolecular interactions, entropic repulsion can be incorporated by rational design in the headgroup of an amphiphile to generate sma ...
DOI:
10.1021/ja3048128
PubMed:
22731391
PubMed Central:
PMC4186246

38. 3-Hydroxy-4-nitrobenzoic Acid as a MALDI Matrix for In-Source Decay

Author:
Fukuyama Yuko; Izumi Shunsuke; Tanaka Koichi
Source:
Analytical chemistry 2016 v.88 no.16 pp. 8058-8063
ISSN:
1520-6882
Subject:
amyloid; corticotropin; desorption; ionization; ions; isoleucine; leucine; peptides; proline; proteomics; renin
Abstract:
... In-source decay (ISD) in matrix-assisted laser desorption/ionization (MALDI) is a rapid sequencing method for peptides. 1,5-Diaminonaphthalene (1,5-DAN) is a most frequently used matrix for ISD. However, using 1,5-DAN generates mainly c- and z-series ions by N–Cα bond cleavage, which makes it difficult to distinguish leucine (Leu) and isoleucine (Ile), and frequently lacks c₍ₙ–₁₎-series ions owing ...
DOI:
10.1021/acs.analchem.6b01471

39. 31P NMR Chemical Shifts of Phosphorus Probes as Reliable and Practical Acidity Scales for Solid and Liquid Catalysts

Author:
Zheng Anmin; Liu Shang-Bin; Deng Feng
Source:
Chemical Reviews 2017 v.117 no.19 pp. 12475-12531
ISSN:
1520-6890
Subject:
Fourier transform infrared spectroscopy; acidity; ammonia; calorimetry; catalysts; catalytic activity; chemical reactions; desorption; liquids; nuclear magnetic resonance spectroscopy; oxides; pH; petrochemicals; phosphorus; porous media; reaction mechanisms; rendering; stable isotopes; titration; zeolites
Abstract:
... Acid–base catalytic reaction, either in heterogeneous or homogeneous systems, is one of the most important chemical reactions that has provoked a wide variety of industrial catalytic processes for production of chemicals and petrochemicals over the past few decades. In view of the fact that the catalytic performances (e.g., activity, selectivity, and reaction mechanism) of acid-catalyzed reactions ...
DOI:
10.1021/acs.chemrev.7b00289

40. 3D MXene Sponge: Facile Synthesis, Excellent Hydrophobicity, and High Photothermal Efficiency for Waste Oil Collection and Purification

Author:
Mengke Wang; Jun Zhu; You Zi; Weichun Huang
Source:
ACS applied materials & interfaces 2021 v.13 no.39 pp. 47302-47312
ISSN:
1944-8252
Subject:
absorption; desalination; desorption; evaporation; hydrogen; hydrophobicity; lighting; melamine; methylene chloride; nanosheets; oils; skeleton; solvents; surface temperature
Abstract:
... Photothermally assisted superhydrophobic sponges play a vital role in the fields of waste oil collection, oil purification, and solar desalination. However, the widely reported superhydrophobic sponges with photothermal efficiency usually suffer from a post-/premodification process of harmful materials, high loading content of photothermal agents, and low photothermal efficiency. Herein, an MXene- ...
DOI:
10.1021/acsami.1c15064

41. 3D MoS2 Composition Aerogels as Chemosensors and Adsorbents for Colorimetric Detection and High-Capacity Adsorption of Hg2+

Author:
Zhi Lihua; Zuo Wei; Chen Fengjuan; Wang Baodui
Source:
ACS sustainable chemistry 2016 v.4 no.6 pp. 3398-3408
ISSN:
2168-0485
Subject:
adsorbents; adsorption; aqueous solutions; colorimetry; desorption; feedstocks; gold; graphene oxide; iron oxides; magnetic separation; mercury; nanogold; nanoparticles; nanosheets; porous media; profits and margins; public health; remediation; water pollution
Abstract:
... Precise detection and effectively eliminating mercury pollution in aqueous solutions remains an onerous task for protecting the public health and environment. In this paper, porous MoS₂ composite aerogel-supported Au nanoparticles with strong mercury affinity have been fabricated to deal with this problem. Such composite aerogels are fabricated using graphene oxide (GO)-doped MoS₂ sheets as the fe ...
DOI:
10.1021/acssuschemeng.6b00409

42. 3D Nanoscale Chemical Imaging of Core–Shell Microspheres via Microlensed Fiber Laser Desorption Postionization Mass Spectrometry

Author:
Yifan Meng; Siyuan Ma; Zhenjian Zhang; Wei Hang
Source:
Analytical chemistry 2020 v.92 no.14 pp. 9916-9921
ISSN:
1520-6882
Subject:
alloys; analytical chemistry; desorption; mass spectrometry; microparticles
Abstract:
... A laser desorption postionization (LDPI) nanoscale resolution mass spectrometry imaging (MSI) technique based on a microlensed fiber is proposed for 3D imaging of microspheres which have a core–shell structure. Results show that the diameter of the sampling crater can be as small as 350 nm by introducing the desorption laser to the sample surface through the microlensed fiber. The use of laser pos ...
DOI:
10.1021/acs.analchem.0c01434

43. 3D printing of graphene-doped target for “matrix-free” laser desorption/ionization mass spectrometry

Author:
Dingyi Wang; Xiu Huang; Jie Li; Bin He; Qian Liu; Ligang Hu; Guibin Jiang
Source:
Chemical communications 2018 v.54 no.22 pp. 2723-2726
ISSN:
1364-548X
Subject:
chemical compounds; desorption; graphene; ionization; mass spectrometry
Abstract:
... We report a graphene-doped resin target fabricated via a 3D printing technique for laser desorption/ionization mass spectrometry analysis. The graphene doped in the target acts as an inherent laser absorber and ionization promoter, thus permitting the direct analysis of samples without adding matrix. This work reveals a new strategy for easy designing and fabrication of functional mass spectrometr ...
DOI:
10.1039/c7cc09649f

44. 3D-printed highly porous and reusable chitosan monoliths for Cu(II) removal

Author:
Dongxing Zhang; Junfeng Xiao; Qiuquan Guo; Jun Yang
Source:
Journal of materials science 2019 v.54 no.8 pp. 6728-6741
ISSN:
0022-2461
Subject:
EDTA (chelating agent); adsorbents; adsorption; chitosan; copper; cost effectiveness; desorption; equations; heavy metals; human health; metal ions; models; moieties; pH; pollution; pollution control; sorption isotherms; surface area; working conditions
Abstract:
... Removal of heavy metal pollution has received considerable research attention due to its severe effects on human health. In the present study, for the first time, a reusable monolithic 3D porous adsorbing filter was fabricated by integrating 3D printing technique with a natural adsorbent (chitosan), which is a low-cost and highly effective solution for heavy metal removal. The –NH₂ and –OH functio ...
DOI:
10.1007/s10853-019-03332-y

45. 3D-printed polylactic acid supports for enhanced ionization efficiency in desorption electrospray mass spectrometry analysis of liquid and gel samples

Author:
Lisa Elviri; Ruben Foresti; Annalisa Bianchera; Marco Silvestri; Ruggero Bettini
Source:
Talanta 2016 v.155 pp. 321-328
ISSN:
0039-9140
Subject:
desorption; detection limit; gels; gentamicin; insulin; ionization; liquids; mass spectrometry; models; polylactic acid; polytetrafluoroethylene; sulfates
Abstract:
... The potential of 3D printing technology was here exploited to prepare tailored polylactic acid (PLA) supports for desorption electrospray ionization (DESI) experiments. PLA rough solid supports presenting wells of different shape (i.e. cylindrical, cubic and hemispherical cavities) were designed to accommodate samples of different physical state.The potentials of such supports in terms of sample l ...
DOI:
10.1016/j.talanta.2016.05.010

46. 3D-surface MALDI mass spectrometry imaging for visualising plant defensive cardiac glycosides in Asclepias curassavica

Author:
Domenic Dreisbach; Georg Petschenka; Bernhard Spengler; Dhaka R. Bhandari
Source:
Analytical and bioanalytical chemistry 2021 v.413 no.8 pp. 2125-2134
ISSN:
1618-2642
Subject:
Asclepias curassavica; analytical chemistry; atmospheric pressure; biotic stress; cardenolides; cardiac glycosides; chemical defenses; desorption; herbivores; indigenous species; ionization; latex; leaves; matrix-assisted laser desorption-ionization mass spectrometry; mechanical damage; metabolism; metabolites; metabolomics; plant tissues; topography
Abstract:
... Mass spectrometry–based imaging (MSI) has emerged as a promising method for spatial metabolomics in plant science. Several ionisation techniques have shown great potential for the spatially resolved analysis of metabolites in plant tissue. However, limitations in technology and methodology limited the molecular information for irregular 3D surfaces with resolutions on the micrometre scale. Here, w ...
DOI:
10.1007/s00216-021-03177-y

47. 3‐D graphene‐supported mesoporous SiO2@Fe3O4 composites for the analysis of pesticides in aqueous samples by magnetic solid‐phase extraction with high‐performance liquid chromatography

Author:
Xuemei Wang; Huan Wang; Muxin Lu; Xiaomin Ma; Pengfei Huang; Xiaoquan Lu; Xinzhen Du
Source:
Journal of separation science 2016 v.39 no.9 pp. 1734-1741
ISSN:
1615-9306
Subject:
adsorbents; adsorption; benzene; desorption; detection limit; graphene; high performance liquid chromatography; hydrophobicity; iron oxides; magnetic separation; nanosheets; pesticides; porosity; porous media; solid phase extraction; solvents; surface area
Abstract:
... Three‐dimensional graphene‐supported mesoporous silica@Fe₃O₄ composites (mSiO₂@Fe₃O₄‐G) were prepared by modifying mesoporous SiO₂‐coated Fe₃O₄ onto hydrophobic graphene nanosheets through a simple adsorption co‐condensation method. The obtained composites possess unique properties of large surface area (332.9 m²/g), pore volume (0.68 cm³/g), highly open pore structure with uniform pore size (31.1 ...
DOI:
10.1002/jssc.201600148

48. 4,6-α-Glucanotransferase, a Novel Enzyme That Structurally and Functionally Provides an Evolutionary Link between Glycoside Hydrolase Enzyme Families 13 and 70

Author:
Slavko Kralj; Pieter Grijpstra; Sander S. van Leeuwen; Hans Leemhuis; Justyna M. Dobruchowska; Rachel M. van der Kaaij; Amarila Malik; Ariyanti Oetari; Johannis P. Kamerling; Lubbert Dijkhuizen
Source:
Applied and environmental microbiology 2011 v.77 no.22 pp. 8154-8163
ISSN:
0099-2240
Subject:
Lactobacillus reuteri; desorption; enzymatic reactions; enzymes; genes; glycosidic linkages; mass spectrometry; methylation; nuclear magnetic resonance spectroscopy; polymerization; polymers; recombinant proteins; sucrose
Abstract:
... Lactobacillus reuteri 121 uses the glucosyltransferase A (GTFA) enzyme to convert sucrose into large amounts of the α-D-glucan reuteran, an exopolysaccharide. Upstream of gtfA lies another putative glucansucrase gene, designated gtfB. Previously, we have shown that the purified recombinant GTFB protein/enzyme is inactive with sucrose. Various homologs of gtfB are present in other Lactobacillus st ...
DOI:
10.1128/AEM.05735-11
PubMed:
21948833
PubMed Central:
PMC3209003

49. 4-MCHM sorption to and desorption from granular activated carbon and raw coal

Author:
T. Scott Jeter; Emily A. Sarver; Harold M. McNair; Mohammad Rezaee
Source:
Chemosphere 2016 v.157 pp. 160-165
ISSN:
0045-6535
Subject:
activated carbon; alcohols; business enterprises; cleaning; coal; desorption; filters; flame ionization; headspace analysis; particle size; rivers; sorbents; water pollution; water supply; water treatment; West Virginia
Abstract:
... 4-Methylcyclohexanemethanol (4-MCHM) is a saturated higher alicyclic primary alcohol that is used in the froth flotation process for cleaning coal. In early 2014, a large spill of crude chemical (containing primarily 4-MCHM) to the Elk River near Charleston, WV contaminated the local water supply. Carbon filters at the affected water treatment facility quickly became saturated, and the contaminate ...
DOI:
10.1016/j.chemosphere.2016.04.125

50. 4-Mercaptophenylboronic acid-modified spirally-curved mesoporous silica nanofibers coupled with ultra performance liquid chromatography–mass spectrometry for determination of brassinosteroids in plants

Author:
Miao Chen; Ranhao Wang; Yuqiu Zhu; Minzhuo Liu; Fawei Zhu; Jianbo Xiao; Xiaoqing Chen
Source:
Food chemistry 2018 v.263 pp. 51-58
ISSN:
0308-8146
Subject:
acids; brassinosteroids; derivatization; desorption; disulfide bonds; fruits; leaves; mass spectrometry; nanofibers; panicles; plant extracts; plant tissues; porous media; silica; sorbents; ultra-performance liquid chromatography
Abstract:
... Herein, for the first time, thiol-functionalized mesoporous silica (mSiO2-SH) nanofibers with a spirally-curved twisted hexagonal morphology were synthesized via a simple one-pot protocol. 4-Mercaptophenylboronic acids (4-MPBA) were attached onto the mSiO2-SH nanofibers via disulfide bond, serving as boronate affinity sorbent to selectively capture brassinosteroids (BRs) from plant extract. The re ...
DOI:
10.1016/j.foodchem.2018.04.129

51. 4-Nitrophenol, 1-nitropyrene, and 9-nitroanthracene emissions in exhaust particles from diesel vehicles with different exhaust gas treatments

Author:
Satoshi Inomata; Akihiro Fushimi; Kei Sato; Yuji Fujitani; Hiroyuki Yamada
Source:
Atmospheric environment 2015 v.110 pp. 93-102
ISSN:
1352-2310
Subject:
adsorption; aerosols; aromatic hydrocarbons; atmospheric chemistry; catalysts; desorption; emissions; emissions factor; filters; gas chromatography; gasoline; liquid chromatography; mass spectrometry; nitrogen content; nitrogen oxides; oxidation; p-nitrophenol; particulates; secondary productivity; volatile compounds
Abstract:
... The dependence of nitro-organic compound emissions in automotive exhaust particles on the type of aftertreatment used was investigated. Three diesel vehicles with different aftertreatment systems (an oxidation catalyst, vehicle-DOC; a particulate matter and NOx reduction system, vehicle-DPNR; and a urea-based selective catalytic reduction system, vehicle-SCR) and a gasoline car with a three-way ca ...
DOI:
10.1016/j.atmosenv.2015.03.043

52. 4-Phenyl-α-cyanocinnamic Acid Amide: Screening for a Negative Ion Matrix for MALDI-MS Imaging of Multiple Lipid Classes

Author:
Fülöp Annabelle; Porada Martina B.; Marsching Christian; Blott Henning; Meyer Björn; Tambe Suparna; Sandhoff Roger; Junker Hans-Dieter; Hopf Carsten
Source:
Analytical chemistry 2013 v.85 no.19 pp. 9156-9163
ISSN:
1520-6882
Subject:
brain; desorption; image analysis; ionization; lasers; lipids; mass spectrometry; nitrogen; screening
Abstract:
... Matrix-assisted laser desorption/ionization imaging mass spectrometry (MALDI-IMS) has become a method of choice in lipid analysis, as it provides localization information for defined lipids that is not readily accessible with nonmass spectrometric methods. Most current MALDI matrices have been found empirically. Nevertheless, preferential matrix properties for many analyte classes are poorly under ...
DOI:
10.1021/ac4018154

53. 4-phenyl-1,2,3-triazole functionalized mesoporous silica SBA-15 as sorbent in an efficient stir bar-supported micro-solid-phase extraction strategy for highly to moderately polar phenols

Author:
Abdulkadir Tanimu; Shehzada Muhammad Sajid Jillani; Ayman A. Alluhaidan; Saheed A. Ganiyu; Khalid Alhooshani
Source:
Talanta 2019 v.194 pp. 377-384
ISSN:
0039-9140
Subject:
Fourier transform infrared spectroscopy; azides; desorption; detection limit; ethyl acetate; gas chromatography-mass spectrometry; ionic strength; moieties; nuclear magnetic resonance spectroscopy; phenols; porosity; porous media; scanning electron microscopy; silica; sodium chloride; solvents; sorbents; statistical analysis; surface area; triazoles; wastewater
Abstract:
... A simple and effective strategy for the extraction of highly to moderately polar phenols in water samples was developed by synthesizing a series of 4-phenyl-1,2,3-triazole functionalized SBA-15 sorbents (xN₃-Ph-SBA-15; x = 2 – 10 wt%) via two steps: azide functionalization of SBA-15 and its click reaction with phenylacetylene. The formed sorbents, which have a blend of both polar (1,2,3-triazole) ...
DOI:
10.1016/j.talanta.2018.10.012

54. 4‐Chloro‐α‐cyanocinnamic acid is an efficient soft matrix for cyanocobalamin detection in foodstuffs by matrix‐assisted laser desorption/ionization mass spectrometry (MALDI MS)

Author:
Cosima Damiana Calvano; Giovanni Ventura; Francesco Palmisano; Tommaso R.I. Cataldi
Source:
Journal of mass spectrometry 2016 v.51 no.9 pp. 841-848
ISSN:
1076-5174
Subject:
2,5-dihydroxybenzoic acid; chemical bonding; desorption; egg yolk; energy; fish; hens; ionization; ions; ligands; liver; mass spectrometry; meat; nitroanilines; qualitative analysis; sodium; vitamin B12
Abstract:
... 4‐Chloro‐α‐cyanocinnamic acid (ClCCA) is a very useful matrix able to give the protonated adduct [M+H]⁺ of intact cyanocobalamin (CNCbl) as the base peak (m/z 1355.58) in matrix‐assisted laser desorption/ionization (MALDI) mass spectrometry (MS). The only fragment observed is [M‐CN + H]⁺• formed through the facile •CN neutral loss reflecting the fairly low Co–C bond energy. All other investigated ...
DOI:
10.1002/jms.3817

55. 5-Methoxytryptophan-dependent protection of cardiomyocytes from heart ischemia reperfusion injury

Author:
Hsiu-Chuan Chou; Hong-Lin Chan
Source:
Archives of biochemistry and biophysics 2014 v.543 pp. 15-22
ISSN:
0003-9861
Subject:
cardiomyocytes; cell death; cell growth; cell movement; cytoskeleton; desorption; gel electrophoresis; hydrogen peroxide; ischemia; mass spectrometry; models; monitoring; neoplasm cells; neoplasms; protein folding; proteins; proteomics; tissue repair; tryptophan
Abstract:
... 5-Methoxytryptophan (5-MTP), a catabolic product of tryptophan, can block Cox-2 overexpression in cancer cells as well as suppress cancer cell growth, migration and invasion. The aim of this study was to in vitro examine whether 5-MTP is able to reduce reactive oxygen species (ROS)-induced heart ischemia reperfusion injury and activate the cardiomyocyte’s damage surveillance systems. Accordingly, ...
DOI:
10.1016/j.abb.2013.12.014

56. 59 lipid dynamics in the early embryonic development of zebrafish by desorption electrospray ionization mass spectrometry imaging and nanoelectrospray–mass spectrometry

Author:
A. K. Jarmusch; C. T. Mahapatra; V. Pirro; C. R. Ferreira; M. S. Sepúlveda
Source:
Reproduction, fertility, and development 2016 v.28 no.2 pp. 159-160
ISSN:
1031-3613
Subject:
Danio rerio; acetonitrile; bile acids; cell membranes; cholesterol; cholesteryl esters; desorption; developmental stages; dimethylformamide; early development; electrospray ionization mass spectrometry; embryogenesis; image analysis; lipid content; lipid metabolism; mitochondria; nutrients; organogenesis; paper; phosphatidylcholines; phosphatidylglycerols; principal component analysis; silver nitrate; spectrometers; squalene; triacylglycerols; ubiquinones; yolk sac
Abstract:
... This study introduces a combination of mass spectrometry-based analytical approaches with little or no sample preparation for the study of zebrafish (Danio rerio) lipid metabolism during early development (0 through 96h post-fertilization, hpf). Desorption electrospray ionization mass spectrometry (DESI-MS) imaging and nanoelectrospray (nESI) MS were used. Embryos (N=107) were placed onto filter p ...
DOI:
10.1071/RDv28n2Ab58

57. 61 unveiling the role of lipids in organogesis: molecular anatomy by desorption electrospray ionization mass spectrometry imaging mass spectrometry

Author:
V. Pirro; P. O. Favaron; C. R. Ferreira; L. S. Eberlin; R. S. Barreto; R. G. Cooks; M. A. Miglino
Source:
Reproduction, fertility, and development 2016 v.28 no.2 pp. 160-161
ISSN:
1031-3613
Subject:
acetonitrile; adipose tissue; arachidonic acid; brain; brain damage; chemical composition; computer software; desorption; diabetes; dimethylformamide; docosahexaenoic acid; electrospray ionization mass spectrometry; fatty acid metabolism; fetal development; fetus; free fatty acids; glass; image analysis; liver; muscle tissues; neoplasms; obesity; oleic acid; organ transplantation; organogenesis; pandemic; phosphatidylcholines; phosphatidylinositols; phosphatidylserines; pregnancy; solvents; spinal cord; swine
Abstract:
... Even though the role of lipids in pandemic diseases such as obesity and diabetes is a focus of increasing research, the role of lipids during organogenesis, when diverse diseases may be triggered, is unexplored. Also, pig embryonic tissues represent an attractive option for organ transplantation. This study introduces a detailed morphological analysis of swine fetal tissues with matching location ...
DOI:
10.1071/RDv28n2Ab60

58. Elizabethkingia Infections in Humans: From Genomics to Clinics

Author:
Jiun-Nong Lin; Chung-Hsu Lai; Chih-Hui Yang; Yi-Han Huang
Source:
Microorganisms 2019 v.7 no.9 pp. -
ISSN:
2076-2607
Subject:
aminoglycosides; antibiotic resistance; carbapenems; databases; desorption; essential genes; fluoroquinolones; genomics; humans; mass spectrometry; microorganisms; minocycline; mutation; new species; pathogens; patients; piperacillin; sequence analysis; species identification
Abstract:
... The genus Elizabethkingia has recently emerged as a cause of life-threatening infections in humans, particularly in immunocompromised patients. Several new species in the genus Elizabethkingia have been proposed in the last decade. Numerous studies have indicated that Elizabethkingia anophelis, rather than Elizabethkingia meningoseptica, is the most prevalent pathogen in this genus. Matrix-assiste ...
DOI:
10.3390/microorganisms7090295
PubMed:
31466280
PubMed Central:
PMC6780780

59. A 2D reversed-phase x ion-pair reversed-phase HPLC-MALDI TOF/TOF-MS approach for shotgun proteome analysis

Author:
Lasaosa, Maria; Delmotte, Nathanaël; Huber, Christian G.; Melchior, Katja; Heinzle, Elmar; Tholey, Andreas
Source:
Analytical and bioanalytical chemistry 2009 v.393 no.4 pp. 1245-1256
ISSN:
1618-2642
Subject:
Corynebacterium glutamicum; bacteria; cation exchange; desorption; ionization; liquid chromatography; mass spectrometry; peptides; proteins; proteome
Abstract:
... The separation of complex peptide mixtures in shotgun proteome analysis using a 2D separation scheme encompassing reversed-phase x ion-pair reversed-phase (IP-RP) liquid chromatography coupled online to electrospray ion trap mass spectrometry (MS) has been shown earlier to be superior in terms of separation efficiency and technical robustness compared to the classically used separation scheme enco ...
DOI:
10.1007/s00216-008-2539-1
PubMed:
19066860

60. A 3-in-1 Hand-Held Ambient Mass Spectrometry Interface for Identification and 2D Localization of Chemicals on Surfaces

Author:
Christina Meisenbichler; Florian Kluibenschedl; Thomas Müller
Source:
Analytical chemistry 2020 v.92 no.21 pp. 14314-14318
ISSN:
1520-6882
Subject:
analytical chemistry; cameras; desorption; drugs; electrospray ionization mass spectrometry; ionization; molecular weight; spectrometers; technology
Abstract:
... Desorption electrospray ionization (DESI), easy ambient sonic-spray ionization (EASI) and low-temperature plasma (LTP) ionization are powerful ambient ionization techniques for mass spectrometry. However, every single method has its limitation in terms of polarity and molecular weight of analyte molecules. After the miniaturization of every possible component of the different ion sources, we final ...
DOI:
10.1021/acs.analchem.0c02615

61. A 3D metal-organic network, [Cu₂(glutarate)₂(4,4′-bipyridine)], that exhibits single-crystal to single-crystal dehydration and rehydration

Author:
Beth Rather; Michael J. Zaworotko
Source:
Chemical communications 2003 v. no.7 pp. 830-831
ISSN:
1364-548X
Subject:
adsorption; chemical reactions; coordination polymers; crystal structure; cupric nitrate; desorption; glutaric acid; rehydration
Abstract:
... The reaction of Cu(NO₃)₂, glutaric acid and 4,4′-bipyridine in water affords a novel 3D coordination polymer which exhibits reversible desorption and adsorption of water molecules with retention of single crystallinity. ...
DOI:
10.1039/b301219k

62. A 70 MPa hydrogen thermally driven compressor based on cyclic adsorption-desorption on activated carbon

Author:
G. Sdanghi; V. Nicolas; K. Mozet; S. Schaefer; G. Maranzana; A. Celzard; V. Fierro
Source:
Carbon 2020 v.161 pp. 466-478
ISSN:
0008-6223
Subject:
activated carbon; adsorption; desorption; heat; hydrogen; micropores; porous media; prototypes; supply chain; surface area; temperature
Abstract:
... In this study, we compressed hydrogen up to 70 MPa in a non-mechanical device based on cyclic, thermally driven, hydrogen adsorption/desorption on activated carbon (AC). Hydrogen compression comes from the desorption of a pre-adsorbed amount of hydrogen at 77 K on a bed of AC closely packed in high-pressure reservoir. A prototype of 0.5 L containing an AC (MSC-30, Kansai, Japan) having a BET area ...
DOI:
10.1016/j.carbon.2020.01.099

63. A Biodegradation Study of SBA-15 Microparticles in Simulated Body Fluid and in Vivo

Author:
Choi Youngjin; Lee Jung Eun; Lee Jung Heon; Jeong Ji Hoon; Kim Jaeyun
Source:
Langmuir 2015 v.31 no.23 pp. 6457-6462
ISSN:
1520-5827
Subject:
X-radiation; adsorption; biochemical compounds; biodegradation; dendritic cells; desorption; hot water treatment; hysteresis; in vivo studies; mice; microparticles; moieties; nanoparticles; nitrogen; porosity; porous media; silica; subcutaneous injection; surface area; toxicity; vaccines
Abstract:
... Mesoporous silica has received considerable attention as a drug delivery vehicle because of its large surface area and large pore volume for loading drugs and large biomolecules. Recently, mesoporous silica microparticles have shown potential as a three-dimensional vaccine platform for modulating dendritic cells via spontaneous assembly of microparticles in a specific region after subcutaneous inj ...
DOI:
10.1021/acs.langmuir.5b01316

64. A Biological Approach for the Synthesis of Bismuth Nanoparticles: Using Thiolated M13 Phage as Scaffold

Author:
Vera-Robles L. Irais; Escobar-Alarcón Luis; Picquart Michel; Hernández-Pozos J. Luis; Haro-Poniatowski Emmanuel
Source:
Langmuir 2016 v.32 no.13 pp. 3199-3206
ISSN:
1520-5827
Subject:
absorption; bacteriophages; biomineralization; bismuth; desorption; infrared spectroscopy; ionization; ions; nanoparticles; oxidation; thiols; transmission electron microscopy
Abstract:
... We report the synthesis of Bi nanoparticles (Bi NPs) using the M13 phage as scaffold. The p8 protein of the phage is functionalized with thiol groups of different lengths, and these thiolated regions act as nucleation centers for Bi³⁺ ions. The size distribution, shape, and resilience to oxidation of the Bi NPs depend on the length of the thiol group used. The NPs are characterized by high resolut ...
DOI:
10.1021/acs.langmuir.5b04369

65. A Biologically Inspired Hydrophobic Membrane for Application in Pervaporation

Author:
Jullok Nora; Martínez Rodrigo; Wouters Christine; Luis Patricia; Sanz María Teresa; Van der Bruggen Bart
Source:
Langmuir 2013 v.29 no.5 pp. 1510-1516
ISSN:
1520-5827
Subject:
Fourier transform infrared spectroscopy; Prunus laurocerasus; artificial membranes; biomimetics; coatings; contact angle; desorption; epicuticular wax; ethyl acetate; hydrophobicity; image analysis; leaves; odor compounds; pervaporation; polydimethylsiloxane; scanning electron microscopy; silicon
Abstract:
... An artificial polydimethylsiloxane/polyphenylsulfone (PDMS/PPSU) membrane, which emulates the hydrophobic behavior of natural membranes, was synthesized. Hydrophobicity was achieved by coating the membrane surface sublayer using conventional silicon material, which imitates the character of epicuticular wax (EW) of Prunus laurocerasus L. leaves. It was then applied as a separation medium in pervap ...
DOI:
10.1021/la3050253

66. A Biomass Cationic Adsorbent Prepared From Corn Stalk: Low-Cost Material and High Adsorption Capacity

Author:
Xue Wen; Chunjie Yan; Na Sun; Tiantian Luo; Shilai Zhou; Wenjun Luo
Source:
Journal of polymers and the environment 2018 v.26 no.4 pp. 1642-1651
ISSN:
1566-2543
Subject:
adsorbents; adsorption; aqueous solutions; biomass; corn stover; desorption; esterification; metal ions; methylene blue; models; polyacrylic acid; sorption isotherms; surveys; wastewater
Abstract:
... In this research, corn stalk fibers (CSF) grafted polyacrylic acid (PAA) on their surfaces (CSF-g-PAA) were successfully prepared via heterogeneous esterification in the case of maintaining inherent fiber framework and shape. It can be used to removal cationic contaminants from aqueous solution. Four dyes and three metal ions were employed as models of cationic adsorbates to survey its adsorption ...
DOI:
10.1007/s10924-017-1072-8

67. A Bottom-Up Synthesis of Vinyl-Cellulose Nanosheets and Their Nanocomposite Hydrogels with Enhanced Strength

Author:
Wang Jianquan; Niu Jiabao; Sawada Toshiki; Shao Ziqiang; Serizawa Takeshi
Source:
Biomacromolecules 2017 v.18 no.12 pp. 4196-4205
ISSN:
1526-4602
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; atomic force microscopy; biodegradation; cellulose; chemical bonding; desorption; hydrogels; magnetism; matrix-assisted laser desorption-ionization mass spectrometry; nanocomposites; nanosheets; natural resources; nuclear magnetic resonance spectroscopy; pH; phosphates; polyethylene glycol; polymerization; strength (mechanics); tissue engineering; transmission electron microscopy
Abstract:
... Extracted nanocellulose from natural resources commonly requires modification before it is used as an effective nanofiller. In the present study, through an enzymatic polymerization of α-d-glucose 1-phosphate from the primer 2-(glucosyloxy)ethyl methacrylate (GEMA), a novel type of two-dimensional methacrylate-containing cellulose nanosheets (CNS) with a thickness of about 6 nm, named as GEMA-CNS, ...
DOI:
10.1021/acs.biomac.7b01224

68. A CO₂-tolerant SrCo₀.₈Fe₀.₁₅Zr₀.₀₅O₃₋δ cathode for proton-conducting solid oxide fuel cells

Author:
Xiuqing Lv; Huili Chen; Wei Zhou; Si-Dian Li; Zongping Shao
Source:
Journal of materials chemistry A 2020 v.8 no.22 pp. 11292-11301
ISSN:
2050-7496
Subject:
X-ray diffraction; carbon dioxide; cathodes; desorption; durability; electrical conductivity; electrochemistry; fuel cells; oxygen; zirconium
Abstract:
... SrCo₀.₈Fe₀.₂O₃₋δ (SCF) exhibits high ionic–electronic conductivity. However, its instability in the presence of CO₂ restricts its application in electrochemical devices. In this study, 5 mol% zirconium was introduced into SCF to improve its structural stability and CO₂ tolerance. SrCo₀.₈Fe₀.₁₅Zr₀.₀₅O₃₋δ (SCFZ) showed metallic electrical conductivity above 500 °C. Furthermore, X-ray diffraction and ...
DOI:
10.1039/d0ta02435j

69. A CaMnAl-hydrotalcite solid basic catalyst toward the aldol condensation reaction with a comparable level to liquid alkali catalysts

Author:
Weihan Bing; Huimin Wang; Lei Zheng; Deming Rao; Yusen Yang; Lirong Zheng; Bin Wang; Yangdong Wang; Min Wei
Source:
Green chemistry 2018 v.20 no.13 pp. 3071-3080
ISSN:
1463-9270
Subject:
X-ray absorption spectroscopy; X-ray diffraction; X-ray photoelectron spectroscopy; active sites; calcium; catalysts; catalytic activity; condensation reactions; desorption; formaldehyde; green chemistry; hydroxides; liquids; manganese
Abstract:
... In a number of heterogeneous catalysis processes, the promotion effect toward active sites is of vital importance and remains a challenge to obtain largely-improved catalytic performance. Herein, rehydrated Ca₄MnₓAl-layered double hydroxides (denoted as re-Ca₄MnₓAl-LDH) were prepared based on a structure memory effect of LDH precursors, which exhibited extremely high heterogeneous catalytic perfor ...
DOI:
10.1039/c8gc00851e

70. A Caffeic Acid Matrix Improves In Situ Detection and Imaging of Proteins with High Molecular Weight Close to 200,000 Da in Tissues by Matrix-Assisted Laser Desorption/Ionization Mass Spectrometry Imaging

Author:
Haiqiang Liu; Manman Han; Jinming Li; Liang Qin; Lulu Chen; Qichen Hao; Dongxu Jiang; Difan Chen; Yuanyuan Ji; Hang Han; Chunlin Long; Yijun Zhou; Jinchao Feng; Xiaodong Wang
Source:
Analytical chemistry 2021 v.93 no.35 pp. 11920-11928
ISSN:
1520-6882
Subject:
Capparis masaikai; absorption; analytical chemistry; brain; caffeic acid; desorption; ferulic acid; ionization; molecular weight; rats; soybeans
Abstract:
... To our knowledge, this was the first study in which caffeic acid (CA) was successfully evaluated as a matrix to enhance the in situ detection and imaging of endogenous proteins in three biological tissue sections (i.e., a rat brain and Capparis masaikai and germinating soybean seeds) by matrix-assisted laser desorption/ionization mass spectrometry imaging (MALDI-MSI). Our results show several prop ...
DOI:
10.1021/acs.analchem.0c05480

71. A Case of Aeromonas trota in an Immunocompromised Patient with Diarrhea

Author:
Ana Fernández-Bravo; Isabel Fort-Gallifa; Frederic Ballester; Isabel Pujol; Frederic Gomez-Bertomeu; Mariola Domínguez; Miquel Micó; Eva Alcoceba; Josep Maria Simó-Sisó; Maria José Figueras
Source:
Microorganisms 2020 v.8 no.3 pp. -
ISSN:
2076-2607
Subject:
Aeromonas enteropelogenes; Aeromonas hydrophila; Aeromonas punctata; Aeromonas trota; Aeromonas veronii; aminoglycosides; ampicillin; antibiotic resistance; beta-lactamase; carbapenems; cephalothin; databases; desorption; diarrhea; feces; genes; humans; patients; quinolones; rare species
Abstract:
... According to recent literature, 95.4% of the Aeromonas strains associated with human clinical cases correspond to four species: Aeromonas caviae, Aeromonas dhakensis, Aeromonas veronii and Aeromonas hydrophila. However, other less prevalent species such as Aeromonas trota, are also described from clinical samples. Based on its low incidence, the latter species can be regarded as rare and it is the ...
DOI:
10.3390/microorganisms8030399

72. A Colloid Model System for Interfacial Sorption Kinetics

Author:
Salipante Paul F.; Hudson Steven D.
Source:
Langmuir 2015 v.31 no.11 pp. 3368-3376
ISSN:
1520-5827
Subject:
adsorption; colloids; desorption; diffusivity; energy; light emitting diodes; microscopy; models; prediction; proteins
Abstract:
... Particle adsorption to an interface may be a complicated affair, motivating detailed measurements of various processes involved, to discover better understanding of the role of particle characteristics and solution conditions on adsorption coverage and rate. Here we use micron size colloids with a weak interfacial interaction potential as a model system to track particle motion and measure the rat ...
DOI:
10.1021/la504821y

73. A Combined Radio- and Stable-Isotopic Study of a California Coastal Aquifer System

Author:
Peter W. Swarzenski; Mark Baskaran; Robert J. Rosenbauer; Brian D. Edwards; Michael Land
Source:
Water 2013 v.5 no.2 pp. 480-504
ISSN:
2073-4441
Subject:
adsorption; age determination; alkalinity; anions; aquifers; barium; calcium; cations; chlorides; desorption; dissolved inorganic carbon; dissolved oxygen; geochemistry; groundwater; inorganic carbon; isotope fractionation; magnesium; methane production; mixing; oil fields; oxygen; potassium; radiolabeling; radionuclides; radon; saltwater intrusion; seawater; silica; sodium; stable isotopes; strontium; sulfates; tritium; uranium; wells; California
Abstract:
... Stable and radioactive tracers were utilized in concert to characterize geochemical processes in a complex coastal groundwater system and to provide constraints on the kinetics of rock/water interactions. Groundwater samples from wells within the Dominguez Gap region of Los Angeles County, California were analyzed for a suite of major cations (Na+, K+, Mg2+, Ca2+) and anions (Cl−, SO₄2−), silica, ...
DOI:
10.3390/w5020480

74. A Comparative Study of Aqueous Potassium Lysinate and Aqueous Monoethanolamine for Postcombustion CO2 Capture

Author:
Yue Zhao; Yangyang Bian; Hui Li; Hui Guo; Shufeng Shen; Jiangze Han; Dongfang Guo
Source:
Energy & fuels 2017 v.31 no.12 pp. 14033-14044
ISSN:
1520-5029
Subject:
absorbents; absorption; alkalinity; amino acids; calorimeters; carbon; carbon dioxide; desorption; energy; ethanolamine; fuels; heat; nitrogen; nuclear magnetic resonance spectroscopy; oxygen; potassium; salts; solubility; solvents; stable isotopes; toxicity
Abstract:
... Aqueous monoethanolamine (MEA) is widely used for CO₂ capture and has been demonstrated as an effective absorbent in many postcombustion capture plants. However, several disadvantages such as toxicity, high volatility, solvent degradation, and high energy consumption were reported in the practical applications. Aqueous amino acid salts, particularly potassium lysinate (LysK), are considered as att ...
DOI:
10.1021/acs.energyfuels.7b02800

75. A Comparative Study of Matrix‐ and Nano‐assisted Laser Desorption/Ionisation Time‐of‐Flight Mass Spectrometry of Isolated and Synthetic Lignin

Author:
Koichi Yoshioka; Daisuke Ando; Takashi Watanabe
Source:
Phytochemical analysis 2012 v.23 no.3 pp. 248-253
ISSN:
0958-0344
Subject:
Pinus densiflora; cellulose; coniferyl alcohol; desorption; ionization; lasers; lignin; mass spectrometry; molecular weight
Abstract:
... INTRODUCTION: Lignin is the second most abundant biopolymer next to cellulose. However, because of the complexity of the heterogeneous macromolecules, it is difficult to elucidate the polymeric structures of lignin by conventional analytical methods. OBJECTIVE: To obtain the detailed structures of lignin, we comparatively applied nano‐assisted laser desorption/ionisation time‐of‐flight mass spectr ...
DOI:
10.1002/pca.1350
PubMed:
21898628

76. A Comparative Study of the CO2 Absorption in Some Solvent-Free Alkanolamines and in Aqueous Monoethanolamine (MEA)

Author:
Barzagli Francesco; Mani Fabrizio; Peruzzini Maurizio
Source:
Environmental Science & Technology 2016 v.50 no.13 pp. 7239-7246
ISSN:
1520-5851
Subject:
absorbents; absorption; air; carbamates; carbon dioxide; desorption; ethanolamine; nuclear magnetic resonance spectroscopy; secondary amines; solvents; temperature
Abstract:
... The neat secondary amines 2-(methylamino)ethanol, 2-(ethylamino)ethanol, 2-(isopropylamino)ethanol, 2-(benzylamino)ethanol and 2-(butylamino)ethanol react with CO₂ at 50–60 °C and room pressure yielding liquid carbonated species without their dilution with any additional solvent. These single-component absorbents have the theoretical CO₂ capture capacity of 0.50 (mol CO₂/mol amine) due to the form ...
DOI:
10.1021/acs.est.6b00150

77. A Comparative Study on Structural Elucidation of Sialyl Oligosaccharides by Mass Spectrometry with Fast Atom Bombardment, Electrospray Ionization, and Matrix Assisted Laser Desorption/Ionization

Author:
Masahiko OKAMOTO
Source:
Bioscience, biotechnology, and biochemistry 2001 v.65 no.11 pp. 2519-2527
ISSN:
1347-6947
Subject:
biotechnology; comparative study; derivatization; desorption; electrospray ionization mass spectrometry; ionization; oligosaccharides; tandem mass spectrometry
Abstract:
... To establish a new protocol for sensitive detection and structural characterization of sialyl oligosaccharides, their sensitivities and structural information from mass spectrometry and tandem mass spectrometry with FAB-, ESI-, and MALDI were evaluated in detail. Among these ionization methods, FAB-MS and FAB-MS/MS gave reproducible and predictable spectra carrying information on sequence and bran ...
DOI:
10.1271/bbb.65.2519

78. A Comparison among Synthetic Layered Double Hydroxides (LDHs) as Effective Adsorbents of Inorganic Arsenic from Contaminated Soil–Water Systems

Author:
Massimo Pigna; Antonio Violante; Antonio Giandonato Caporale
Source:
Soil systems 2020 v.4 no.2 pp. -
ISSN:
2571-8789
Subject:
adsorbents; adsorption; arsenic; cost effectiveness; desorption; paper; soil water; toxicity
Abstract:
... The need for cost-effective adsorbents of inorganic arsenic (As(III) and As(V)) stimulates the academia to synthesize and test novel materials that can be profitably applied at large-scale in most affected areas worldwide. In this study, four different layered double hydroxides (Cu-Al-, Mg-Al-, Mg-Fe- and Zn-Al-LDH), previously synthesized and studied for As(III) removal capacity, were evaluated a ...
DOI:
10.3390/soilsystems4020037

79. A Comparison of Four Methods of Measuring Gross Phosphorus Mineralization

Author:
Laurie E. Kellogg; Scott D. Bridgham; Danilo López-Hernández
Source:
Soil Science Society of America journal 2006 v.70 no.4 pp. 1349-1358
ISSN:
0361-5995
Subject:
estimation; mineralization; mathematical models; exchangeable cations; equations; soil; soil microorganisms; biological activity in soil; isotope dilution technique; adsorption; extraction; measurement; desorption; phosphorus
Abstract:
... This study compared three previously published methods of estimating gross P mineralization: (i) an isotope dilution method that relies on specific activity, (ii) a later isotope dilution method that uses isotopically exchangeable P as the response variable, and (iii) a differential extraction method. We adapted the isotope dilution method (KB) commonly used for gross N mineralization for gross P ...
DOI:
10.2136/sssaj2005.0300

80. A Comparison of Inorganic Solid Wastes as Adsorbents of Heavy Metal Cations in Aqueous Solution and Their Capacity for Desorption and Regeneration

Author:
Ya-Feng Zhou; Richard John Haynes
Source:
Water, air, and soil pollution 2011 v.218 no.1-4 pp. 457-470
ISSN:
0049-6979
Subject:
research and development; alum; heavy metals; cations; solid wastes; coal fly ash; steel; aqueous solutions; acids; coal; sorption isotherms; adsorbents; acid treatment; adsorption; neutralization; slags; desorption; water treatment; pH; alkalinity; sludge; furnaces
Abstract:
... The adsorption capacity of seven inorganic solid wastes [air-cooled blast furnace (BF) slag, water-quenched BF slag, steel furnace slag, coal fly ash, coal bottom ash, water treatment (alum) sludge and seawater-neutralized red mud] for Cd2+, Cu2+, Pb2+, Zn2+ and Cr3+ was determined at two metal concentrations (10 and 100 mg L−1) and three equilibrium pH values (4.0, 6.0 and 8.0) in batch adso ...
DOI:
10.1007/s11270-010-0659-7

81. A Comparison of Water Treatment Sludge and Red Mud as Adsorbents of As and Se in Aqueous Solution and Their Capacity for Desorption and Regeneration

Author:
Ya-Feng Zhou; Richard J. Haynes
Source:
Water, air, and soil pollution 2012 v.223 no.9 pp. 5563-5573
ISSN:
0049-6979
Subject:
adsorbents; adsorption; alum; aqueous solutions; desorption; equations; heavy metals; models; pH; seawater; sludge; streams; wastewater; water treatment
Abstract:
... The adsorption of As(III), As(V), Se(IV) and Se(VI) by seawater neutralized red mud and alum water treatment sludge was investigated and compared using the batch adsorption technique. For water treatment sludge, adsorption of As(V), Se(IV) and Se(VI), at equimolar concentrations of added metalloid, declined with increasing pH. The decline was rapid above pH 4.0 for Se(VI), above pH 5.0 for Se(IV) ...
DOI:
10.1007/s11270-012-1296-0

82. A Control Method To Inspect the Compositional Authenticity of Minas Frescal Cheese by Gel Electrophoresis

Author:
Renata B. Magenis; Elane S. Prudencio; Luciano Molognoni; Heitor Daguer
Source:
Journal of agricultural and food chemistry 2014 v.62 no.33 pp. 8333-8339
ISSN:
0021-8561
Subject:
adulterated products; beta-lactoglobulin; cheeses; cluster analysis; control methods; densitometry; desorption; detection limit; digestion; freeze drying; gels; ionization; mass spectrometry; milk; monitoring; polyacrylamide gel electrophoresis; sodium dodecyl sulfate; trypsin; whey
Abstract:
... This study introduces a qualitative method to inspect the compositional authenticity of white nonripened cheeses like Minas Frescal, a typical Brazilian cheese, especially when irregular replacement of milk by whey is suspected. A sodium dodecyl sulfate gel electrophoresis (SDS–PAGE) method, followed by image densitometry, was validated. Cheeses were freeze-dried to electrophoresis, and β-lacto ...
DOI:
10.1021/jf502864e

83. A Co–Mo₂N composite on a nitrogen-doped carbon matrix with hydrogen evolution activity comparable to that of Pt/C in alkaline media

Author:
Xuewei Lang; Muhammad Abdul Qadeer; Guoqiang Shen; Rongrong Zhang; Sichao Yang; Jiayi An; Lun Pan; Ji-Jun Zou
Source:
Journal of materials chemistry A 2019 v.7 no.36 pp. 20579-20583
ISSN:
2050-7496
Subject:
carbon; catalysts; cobalt; desorption; dissociation; electrical conductivity; electrochemistry; hydrogen; hydrogen production; molybdenum; nanocomposites; nanoparticles; nitrides; platinum; potassium hydroxide
Abstract:
... Intrinsic activity and electrical conductivity play key roles in the hydrogen evolution reaction (HER). We herein design and synthesise nanocomposites of metallic cobalt and molybdenum nitride on a nitrogen-doped carbon matrix (Co–Mo₂N@NC). The electrocatalyst exhibits extraordinary HER performance with an overpotential of only 47 mV at a current density of 10 mA cm⁻² and Tafel slope of 43 mV dec⁻ ...
DOI:
10.1039/c9ta07749a

84. A Co₃O₄–CeO₂ functionalized SBA-15 monolith with a three-dimensional framework improves NOₓ-assisted soot combustion

Author:
Qiongqiong Yang; Fangna Gu; Yufang Tang; Hui Zhang; Qing Liu; Ziyi Zhong; Fabing Su
Source:
RSC advances 2015 v.5 no.34 pp. 26815-26822
ISSN:
2046-2069
Subject:
X-ray diffraction; X-ray photoelectron spectroscopy; active sites; adsorption; carbon dioxide; catalysts; catalytic activity; cerium; cobalt; combustion; crosslinking; desorption; energy; hydrogen; nitrogen; nitrogen oxides; oxygen; particulates; porous media; scanning electron microscopy; soot; transmission electron microscopy
Abstract:
... In this work, a cobalt and cerium composite oxide functionalized SBA-15 monolith (SM) with an inner three-dimensional (3D) network structure (CoCe/SM) was prepared by isovolumetric impregnation. Its catalytic activities towards NOₓ-assisted soot combustion were evaluated and the loading and Co/Ce ratio were optimized. X-ray diffraction, scanning electron microscopy, energy dispersed spectroscopy, ...
DOI:
10.1039/c4ra16832a

85. A Critical Evaluation on the Use of Kinetics for Determining Thermodynamics of Ion Exchange in Soils

Author:
R. A. Ogwada; D. L. Sparks
Source:
Soil Science Society of America journal 1986 v.50 no.2 pp. 300-305
ISSN:
0361-5995
Subject:
adsorption; calcium; desorption; ion exchange; miscible displacement; potassium; soil; thermodynamics; Delaware
Abstract:
... Thermodynamics of K-Ca exchange were compared using equilibrium and kinetic approaches in two Delaware soils. The classical Argersinger theory was employed for the equilibrium approach, while a kinetic approach was studied using miscible displacement, batch, and vigorously mixed batch techniques. These three techniques were used to determine how diffusion affects the comparison between thermodynam ...
DOI:
10.2136/sssaj1986.03615995005000020009x

86. A Crystalline Three-Dimensional Covalent Organic Framework with Flexible Building Blocks

Author:
Xiaoling Liu; Jian Li; Bo Gui; Guiqing Lin; Qiang Fu; Sheng Yin; Xuefen Liu; Junliang Sun; Cheng Wang
Source:
Journal of the American Chemical Society 2021 v.143 no.4 pp. 2123-2129
ISSN:
1520-5126
Subject:
adsorption; composite films; crystal structure; desorption; polymers; topology; vapors
Abstract:
... The construction of three-dimensional covalent organic frameworks (3D COFs) has proven to be very challenging, as their synthetic driving force mainly comes from the formation of covalent bonds. To facilitate the synthesis, rigid building blocks are always the first choice for designing 3D COFs. In principle, it should be very appealing to construct 3D COFs from flexible building blocks, but there ...
DOI:
10.1021/jacs.0c12505

87. A DFT Structural Investigation of New Bimetallic PtSnx Surface Alloys Formed on the Pt(110) Surface and Their Interaction with Carbon Monoxide

Author:
Zheng Jian; Busch Michael; Artiglia Luca; Skála Tomáš; Rossmeisl Jan; Agnoli Stefano
Source:
The Journal of Physical Chemistry C 2016 v.120 no.44 pp. 25306-25316
ISSN:
1932-7455
Subject:
adsorption; alloys; carbon monoxide; desorption; energy; models; periodicity; scanning tunneling microscopy; spectroscopy; tin
Abstract:
... Two surface alloys with p(3 × 1) and p(6 × 1) periodicity have been identified after the deposition of metallic Sn on the (1 × 2)-Pt(110) surface. These two structures have been characterized by low-energy electron diffraction (LEED), scanning tunneling microscopy (STM), and photoemission spectroscopy. Based on the experimental results and density functional theory (DFT) calculations, we propose a ...
DOI:
10.1021/acs.jpcc.6b06638

88. A Desorption–Dissolution Model for Metal Release from Polluted Soil under Reductive Conditions

Author:
Mélanie Davranche; Jean-Claude Bollinger
Source:
Journal of environmental quality 2001 v.30 no.5 pp. 1581-1586
ISSN:
1537-2537
Subject:
ascorbic acid; cadmium; cation exchange capacity; cations; desorption; heavy metals; lead; models; moieties; polluted soils
Abstract:
... Various natural or provoked situations can cause significant variations in redox conditions that can induce reductive dissolution of soil components. When this happens, heavy metals that may be bound to solid phases are released. A surface desorption–dissolution model, which takes into account the effect of reductive conditions on surface site density, was established. This model is based on conve ...
DOI:
10.2134/jeq2001.3051581x

89. A Detailed Investigation of Adsorption Isotherms, Enthalpies, and Kinetics of Mercury Adsorption on Nonimpregnated Activated Carbon

Author:
Jonas M. Ambrosy; Christoph Pasel; Michael Luckas; Margot Bittig; Dieter Bathen
Source:
Industrial & engineering chemistry process design and development 2019 v.58 no.10 pp. 4208-4221
ISSN:
1520-5045
Subject:
activated carbon; adsorbents; adsorption; desorption; diffusivity; enthalpy; hydrocarbons; mercury; nitrogen; process design; sorption isotherms; temperature; volatilization
Abstract:
... In comparison to the adsorption of hydrocarbons, the adsorption of mercury on activated carbons reveals many unexpected results. Both physisorptive and chemisorptive mechanisms play a role even in the adsorption on nonimpregnated activated carbons. In this work, the adsorption of Hg⁰ from a N₂ carrier gas stream is studied on three commercial adsorbents. Single and cumulative breakthrough curves a ...
DOI:
10.1021/acs.iecr.8b05932

90. A Diaminopropane-Appended Metal–Organic Framework Enabling Efficient CO2 Capture from Coal Flue Gas via a Mixed Adsorption Mechanism

Author:
Milner Phillip J.; Siegelman Rebecca L.; Forse Alexander C.; Gonzalez Miguel I.; Runčevski Tomče; Martell Jeffrey D.; Reimer Jeffrey A.; Long Jeffrey R.
Source:
Journal of the American Chemical Society 2017 v.139 no.38 pp. 13541-13553
ISSN:
1520-5126
Subject:
X-ray diffraction; adsorbents; adsorption; ammonium; carbamates; carbon; carbon dioxide; coal; coordination polymers; desorption; enthalpy; flue gas; magnesium; nuclear magnetic resonance spectroscopy; power plants; temperature; thermogravimetry; zinc
Abstract:
... A new diamine-functionalized metal–organic framework comprised of 2,2-dimethyl-1,3-diaminopropane (dmpn) appended to the Mg²⁺ sites lining the channels of Mg₂(dobpdc) (dobpdc⁴– = 4,4′-dioxidobiphenyl-3,3′-dicarboxylate) is characterized for the removal of CO₂ from the flue gas emissions of coal-fired power plants. Unique to members of this promising class of adsorbents, dmpn–Mg₂(dobpdc) displays f ...
DOI:
10.1021/jacs.7b07612

91. A Direct Method for Quantifying the Effects of Aging on the Bioavailability of Legacy Contaminants in Soil and Sediment

Author:
Jie Wang; Daniel Schlenk; Jay Gan
Source:
Environmental science & technology letters 2019 v.6 no.3 pp. 148-152
ISSN:
2328-8930
Subject:
DDT (pesticide); Eisenia fetida; Lumbriculus variegatus; bioaccumulation; bioavailability; desorption; earthworms; isotope labeling; lakes; mass spectrometry; persistent organic pollutants; polluted soils; polychlorinated biphenyls; remediation; risk estimate; sediments; soil pollution; soil sampling; California; Florida
Abstract:
... A majority of persistent organic pollutants (POPs) that we see today have in fact undergone extensive aging in the environment, as their use was discontinued several decades ago. While contaminant aging is commonly believed to lead to reduced bioavailability, at present there is not a direct method for quantitatively determining the effect of aging. Here we propose a method based on the addition o ...
DOI:
10.1021/acs.estlett.8b00661

92. A Dirty Story: Improving Colloidal Monolayer Formation by Understanding the Effect of Impurities at the Air/Water Interface

Author:
Marcel Rey; Taotao Yu; Roman Guenther; Karina Bley; Nicolas Vogel
Source:
Langmuir 2018 v.35 no.1 pp. 95-103
ISSN:
1520-5827
Subject:
acrylic acid; air; cleaning; colloids; composite polymers; desorption; dispersions; emulsions; liquids; nanomaterials; polymerization; polystyrenes; protocols; styrene
Abstract:
... Colloidal monolayers are important tools to fabricate surface structures at the nanoscale. A typical monolayer fabrication strategy involves the self-assembly of colloidal building blocks at liquid interfaces, which are subsequently deposited on a solid substrate. Even though this process is well established, the resulting order of the particles within the colloidal monolayer differs between batch ...
DOI:
10.1021/acs.langmuir.8b02605

93. A Fine-Tuned Fluorinated MOF Addresses the Needs for Trace CO2 Removal and Air Capture Using Physisorption

Author:
Bhatt Prashant M.; Belmabkhout Youssef; Cadiau Amandine; Adil Karim; Shekhah Osama; Shkurenko Aleksander; Barbour Leonard J.; Eddaoudi Mohamed
Source:
Journal of the American Chemical Society 2016 v.138 no.29 pp. 9301-9307
ISSN:
1520-5126
Subject:
X-ray diffraction; adsorbents; adsorption; air; carbon; carbon dioxide; desorption; energy efficiency; fluorine
Abstract:
... The development of functional solid-state materials for carbon capture at low carbon dioxide (CO₂) concentrations, namely, from confined spaces (<0.5%) and in particular from air (400 ppm), is of prime importance with respect to energy and environment sustainability. Herein, we report the deliberate construction of a hydrolytically stable fluorinated metal–organic framework (MOF), NbOFFIVE-1-Ni, w ...
DOI:
10.1021/jacs.6b05345

94. A First-Principles Study of the Mechanism and Site Requirements for CO₂ Methanation over CeO₂-Supported Ru Catalyst

Author:
Hong-Yan Ma; Gui-Chang Wang
Source:
Journal of physical chemistry 2021 v.125 no.33 pp. 18161-18169
ISSN:
1932-7455
Subject:
activation energy; adsorption; carbon dioxide; catalysts; catalytic activity; density functional theory; desorption; dissociation; greenhouse gases; methane; methane production; particle size; renewable energy sources
Abstract:
... CO₂ methanation might play an important role in reducing greenhouse gas emissions and storing surplus renewable energy in the form of methane. In the present work, CO₂ methanation on the CeO₂(110)-supported Ruₙ cluster (n = 1, 4, 8) has been studied by density functional theory calculations and mean-field microkinetic modeling method, to seek the fundamental connection between the Ruₙ particle siz ...
DOI:
10.1021/acs.jpcc.1c04231

95. A Flow-Through Reactor with an Infinite Sink for Monitoring Desorption Processes

Author:
Dirk Freese; Peter G. Weidler; Daniel Grolimund; Hans Sticher
Source:
Journal of environmental quality 1999 v.28 no.2 pp. 537-543
ISSN:
0047-2425
Subject:
manganese; hematite; silica; hydroxides; monitoring; goethite; iron; cations; soil; anions; pH; phosphates; sand; ferrihydrite; desorption
Abstract:
... The assessment of elemental release processes in soils are of large interest in soil research. A technique is presented where the advantages of a flow-through reactor are combined with a specific infinite sink. Between the two reactors an electrolyte solution (pH 6) acting as a transport carrier was circulated continuously in a closed-loop setup. To demonstrate the capability of the new technique, ...
DOI:
10.2134/jeq1999.00472425002800020019x

96. A GCMC simulation and experimental study of krypton adsorption/desorption hysteresis on a graphite surface

Author:
Luisa Prasetyo; Toshihide Horikawa; Poomiwat Phadungbut; Shiliang (Johnathan) Tan; D.D. Do; D. Nicholson
Source:
Journal of colloid and interface science 2016 v.478 pp. 402-412
ISSN:
0021-9797
Subject:
Monte Carlo method; adsorption; desorption; graphene; hysteresis; krypton; sorption isotherms
Abstract:
... Adsorption isotherms and isosteric heats of krypton on a highly graphitized carbon black, Carbopack F, have been studied with a combination of Monte Carlo simulation and high-resolution experiments at 77K and 87K. Our investigation sheds light on the microscopic origin of the experimentally observed, horizontal hysteresis loop in the first layer, and the vertical hysteresis-loop in the second laye ...
DOI:
10.1016/j.jcis.2016.06.033

97. A General Model for Kinetics of Heavy Metal Adsorption and Desorption on Soils

Author:
Shi Zhenqing; Di Toro Dominic M.; Allen Herbert E.; Sparks Donald L.
Source:
Environmental Science & Technology 2013 v.47 no.8 pp. 3761-3767
ISSN:
1520-5851
Subject:
reaction kinetics; copper; zinc; calcium; heavy metals; lead; models; soil organic matter; soil; carbon; adsorbents; pH; binding capacity; desorption; adsorption
Abstract:
... In this study, we propose a general kinetics model for heavy metal adsorption and desorption reactions in soils when soil organic matter (SOM) is the dominant adsorbent. The kinetics model, integrated with the equilibrium speciation model WHAM VI, specifically considers metal reactions with SOM and dissolved organic matter (DOM) and accounts for the variations of solution chemistry. Metal reaction ...
DOI:
10.1021/es304524p

98. A Generic Method for Determining Moisture Sorption Isotherms of Cereal Grains and Legumes Using Artificial Neural Networks

Author:
Majdi Al‐Mahasneh; Fahad Alkoaik; Ahmed Khalil; Ahmad Al‐Mahasneh; Ahmed El‐Waziry; Ronnel Fulleros; Taha Rababah
Source:
Journal of food process engineering 2014 v.37 no.3 pp. 308-316
ISSN:
0145-8876
Subject:
adsorption; desorption; drying; equations; equipment design; food storage; foods; legumes; neural networks; prediction; relative humidity; reproducibility; shelf life; small cereal grains; sorption isotherms; storage conditions; temperature; water content
Abstract:
... Moisture sorption isotherms (MSI) are required to optimize handling, drying, processing and storage of food products. MSI are obtained by solving nonlinear equations iteratively, which is normally a difficult process. A generic approach was successfully used for collective prediction of MSI for 12 cereals and five legumes simultaneously, by taking advantage of the superior computational capabiliti ...
DOI:
10.1111/jfpe.12087

99. A Glucose Oxidase Immobilized Electrode Based on Modified Graphite

Author:
Nina Dimcheva; Elena Horozova; Zinaida Jordanova
Source:
Zeitschrift für Naturforschung 2014 v.57 no.7-8 pp. 705-711
ISSN:
1865-7125
Subject:
desorption; electrochemistry; electrodes; gelatin; glucose; glucose oxidase; graphene; hydrogen peroxide; silver; silver chloride; uric acid
Abstract:
... Glucose oxidase (E. C. 1.1.3.4) was immobilized on electrochemically modified graphite to obtain an enzyme electrode. The working surface of the electrode was coated with gelatine to prevent desorption of the enzyme. In substrate (glucose) solutions the amperometric signal of the enzyme electrode was due to the electroreduction of H₂O₂ generated in the enzyme layer. The linearity of the electrode ...
DOI:
10.1515/znc-2002-7-826

100. A HFCF-UF method to directly analyze the total concentration of protein-binding drugs

Author:
Chaohui Du; Jinfeng Zhang; Xinyu Wang; Congcong Ran; Qinglian Li; Ye Jiang
Source:
Analytical methods 2015 v.7 no.18 pp. 7799-7804
ISSN:
1759-9679
Subject:
acetone; analytical methods; desorption; humans; models; monitoring; phenobarbital; protein binding; therapeutics; ultrafiltration
Abstract:
... In the present study, a direct injection hollow fiber centrifugal ultrafiltration (HFCF-UF) method was developed for therapeutic drug monitoring (TDM) for the total concentration of liposoluble protein binding drugs. We used carbamazepine (CBZ) and phenobarbital (PB) as model drugs and proposed a HFCF-UF method to analyze the total concentration of liposoluble protein binding drugs without the use ...
DOI:
10.1039/c5ay01545f