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1. Flavonoids interference in common protein assays: Effect of position and degree of hydroxyl substitution

Author:
Singh, Rashim; Lu, Rong; Hu, Ming
Source:
Analytical biochemistry 2020 v.597 pp. 113644
ISSN:
0003-2697
Subject:
acetone,   etc   ; colorimetry; diet; excretion; flavonoids; humans;     Show all 6 Subjects
Abstract:
... Flavonoids interfere with colorimetric protein assays in a concentration- and structure-dependent manner. Degree (≥3) and position (C₃) of –OH substitution was associated with intensified interference (p < 0.05). Significant overestimation of protein (~3–5 folds) could occur at higher flavonoid concentrations (>5 μM) and is particularly evident at lower protein concentrations (25–250 μg/ml). Since ...
DOI:
10.1016/j.ab.2020.113644

2. α-Hydroxyphosphonates as intermediates in the Kabachnik–fields reaction: New proof of their reversible formation

Author:
Keglevich, György; Rádai, Zita
Source:
Tetrahedron letters 2020 v.61 no.23 pp. 151961
ISSN:
0040-4039
Subject:
acetone,   etc   ; benzaldehyde; carbonates; catalytic activity; chemical reactions; chemical structure; phosphonates;     Show all 7 Subjects
Abstract:
... The rearrangement of dimethyl α-hydroxybenzylphosphonate to the corresponding benzylphosphate in the presence of an alkali carbonate in acetone under phase transfer catalytic conditions was accompanied by the formation of dimethyl α–hydroxyisopropylphosphonate, proving the reversibility of the formation of the hydroxyphosphonate from benzaldehyde and dimethyl phosphite in the Pudovik reaction. The ...
DOI:
10.1016/j.tetlet.2020.151961

3. Major factors influencing the quantification of Nile Red stained microplastics and improved automatic quantification (MP-VAT 2.0)

Author:
Prata, Joana C.; Alves, Jorge R.; da Costa, João P.; Duarte, Armando C.; Rocha-Santos, Teresa
Source:
The Science of the total environment 2020 v.719 pp. 137498
ISSN:
0048-9697
Subject:
acetone,   etc   ; automation; cameras; fluorescence; hydrogen peroxide; iron; microplastics; staining;     Show all 8 Subjects
Abstract:
... Automated count of Nile Red fluorescent microplastics allows fast and reliable quantification. However, factors involving staining, digital camera conditions and settings introduce variability to the results. The objective of this paper is to identify and propose solutions to these factors and improve on the previous MP-VAT script. While removal of digital sensor defects had little influence on re ...
DOI:
10.1016/j.scitotenv.2020.137498

4. A comparative assessment of consolidation materials applied to burned bone

Author:
Siegert, C.C.; Hamilton, M.D.; Erhart, E.M.; Devlin, J.B.
Source:
Forensic science international 2020 v.310 pp. 110224
ISSN:
0379-0738
Subject:
acetone,   etc   ; data collection; forensic sciences; solvents; teeth; vibration;     Show all 6 Subjects
Abstract:
... Fire-altered or fragmentary bone presents a challenge to forensic anthropologists and bioarchaeologists due to its characteristic friability. A potential solution to this problem is the use of consolidant materials on fragile osteological material, including burned remains. Although anthropologists and odontologists employ a variety of consolidant materials, there is no consensus regarding which m ...
DOI:
10.1016/j.forsciint.2020.110224

5. Preparation and application of alcohol based deep eutectic solvents for extraction of curcumin in food samples prior to its spectrophotometric determination

Author:
Altunay, Nail; Elik, Adil; Gürkan, Ramazan
Source:
Food chemistry 2020 v.310 pp. 125933
ISSN:
0308-8146
Subject:
acetone,   etc   ; betaine; curcumin; detection limit; glycerol; microextraction; pH; solvents;     Show all 8 Subjects
Abstract:
... In this study, a novel, simple and economic vortex-assisted alcohol-based deep eutectic solvent microextraction (VA-DES-ME) procedure has been developed for the preconcentration of curcumin in food samples prior to its spectrophotometric determination. A alcohol-based-DES consists of betaine hydrochloride - glycerol (1:3) as extraction solvent and acetone as aprotic solvent at pH 6.0 were used for ...
DOI:
10.1016/j.foodchem.2019.125933

6. Derivatives of the triaminoguanidinium ion, 6. Aminal-forming reactions with aldehydes and ketones

Author:
Szabo, Jan; Maas, Gerhard
Source:
Zeitschrift für Naturforschung 2020 v.75 no.3 pp. 317-326
ISSN:
1865-7117
Subject:
acetone,   etc   ; benzaldehyde; chlorides; crystal structure; formaldehyde; guanidinium; sulfates; triazoles;     Show all 8 Subjects
Abstract:
... Cyclic aminals (N,N-acetals) could be prepared by the reaction of N,N′,N″-triaminoguanidinium sulfate, N,N′,N″-tris(benzylamino)guanidinium chloride or N,N′,N″-tris(benzylamino)guanidine with formaldehyde or acetone. In all cases, 1,2,4,5-tetrazinane derivatives were obtained, which were structurally confirmed by X-ray crystal structure determinations. In two cases, 1:1 cocrystals of two different ...
DOI:
10.1515/znb-2019-0216

7. Nanosheet-assembled, hollowed-out hierarchical γ-Fe₂O₃ microrods for high-performance gas sensing

Author:
Song, Zhijia; Chen, Hanming; Bao, Susu; Xie, Zhaoxiong; Kuang, Qin; Zheng, Lansun
Source:
Journal of materials chemistry A 2020 v.8 no.7 pp. 3754-3762
ISSN:
2050-7496
Subject:
acetone,   etc   ; adsorption; ferric oxide; gases; nanosheets; oxygen; surface area;     Show all 7 Subjects
Abstract:
... Preventing the stacking of two-dimensional (2D) structured nanomaterials is important for developing high-performance gas sensors. To address this challenge, three-dimensional (3D) hollowed-out hierarchical Fe₂O₃ microrods assembled by nanosheets were successfully fabricated via a facile MgO-mediated chemical template conversion strategy. Structurally, the large active surface area of the microrod ...
DOI:
10.1039/c9ta12052a

8. Reductive coupling of phthalic anhydrides with aliphatic ketones by low-valent titanium: Unusual two-to-one coupling for preparation of 3,3-disubstituted phthalides

Author:
Kise, Naoki; Yamamoto, Shota; Sakurai, Toshihiko
Source:
Tetrahedron 2020 v.76 no.3 pp. 130820
ISSN:
0040-4020
Subject:
acetone,   etc   ; anhydrides; chemical reactions; chemical structure; phthalides; stereoselectivity; titanium;     Show all 7 Subjects
Abstract:
... The reductive coupling of phthalic anhydrides with acetone by Zn-TiCl₄ in THF gave two-to-one and one-to-one coupled products. The coupled products were transformed to 3,3-diisopropyl-, 3-isopropylidene-, and 3-isopropylphthalides. In addition, the reductive coupling of phthalic anhydrides with acetonylacetone by Zn-TiCl₄ in THF gave 3-spirocyclopentanylphtalides stereoselectively. ...
DOI:
10.1016/j.tet.2019.130820

9. Origin and characterisation of the extractable colour of oak heartwood used for ageing spirits

Author:
Vivas, Nicolas; Bourden-Nonier, Marie-Françoise; de Gaulejac, Nathalie Vivas; Mouche, Claire; Rossy, Cybille
Source:
Journal of wood science 2020 v.66 no.1 pp. 21
ISSN:
1435-0211
Subject:
acetone,   etc   ; beverages; cell walls; copolymerization; heartwood; oxidation; polymers; polysaccharides; wood; wood fibers;     Show all 10 Subjects
Abstract:
... In this study, investigation is focused on the soluble part of oak heartwood colour, with the objective of defining its impact on the colour of spirits after a barrel ageing. Colour is an important parameter for estimating the quality of many beverages and food items. Acetone with 30% water permitted a fast and complete extraction of the soluble colouring matter of heartwood. Water is necessary to ...
DOI:
10.1186/s10086-020-01866-3

10. Sensing of volatile organic compounds on two-dimensional nitrogenated holey graphene, graphdiyne, and their heterostructure

Author:
Hussain, Tanveer; Sajjad, Muhammad; Singh, Deobrat; Bae, Hyeonhu; Lee, Hoonkyung; Larsson, J. Andreas; Ahuja, Rajeev; Karton, Amir
Source:
Carbon 2020 v.163 pp. 213-223
ISSN:
0008-6223
Subject:
acetone,   etc   ; adsorption; ethanol; graphene; temperature; thermodynamics; toluene; van der Waals forces; volatile organic compounds;     Show all 9 Subjects
Abstract:
... Gas-sensing properties of nitrogenated holey graphene (C₂N), graphdiyne (GDY) and their van der Waals heterostructure (C₂N…GDY) have been studied towards particular volatile organic compounds (VOCs) by means of spin-polarized, dispersion-corrected DFT calculations. We find that VOCs such as acetone, ethanol, propanal, and toluene interact weakly with the GDY monolayer; however, the bindings are si ...
DOI:
10.1016/j.carbon.2020.02.078

11. Visible light photocatalysis of amorphous Cl-Ta2O5−x microspheres for stabilized hydrogen generation

Author:
Yu, Xin; Zhao, Jingjing; Huang, Jielin; Zhao, Jiawei; Guo, Yifan; Tang, Yanting; Ma, Xinqi; Li, Zhonghua; Guo, Quanhui; Zhao, Junwei
Source:
Journal of colloid and interface science 2020 v.572 pp. 141-150
ISSN:
0021-9797
Subject:
acetone,   etc   ; energy conversion; hydrogen production; light; microparticles; nanoparticles; oxygen; photocatalysis; semiconductors; solar energy; tantalum oxide;     Show all 11 Subjects
Abstract:
... Harvesting broad spectral absorption and visible light photocatalysis of ultrawide bandgap semiconductors are one of most significative topics in the solar energy conversion and utilization fields. In this work, amorphous Cl-Ta₂O₅₋ₓ microspheres were prepared by facile solvothermal method for stabilized visible light photocatalytic hydrogen generation. The acetone absorbed on the interfaces of Ta₂ ...
DOI:
10.1016/j.jcis.2020.03.030

12. Molecular insights into the dispersion stability of graphene oxide in mixed solvents: Theoretical simulations and experimental verification

Author:
Chen, Junlang; Dai, Fangfang; Zhang, Lingling; Xu, Jing; Liu, Wei; Zeng, Songwei; Xu, Can; Chen, Liang; Dai, Chaoqing
Source:
Journal of colloid and interface science 2020 v.571 pp. 109-117
ISSN:
0021-9797
Subject:
acetone,   etc   ; dimethyl sulfoxide; electronics; ethanol; graphene oxide; hydrogen bonding; model validation; oxidation; simulation models; solvents;     Show all 10 Subjects
Abstract:
... Improving the dispersion stability of graphene oxide (GO) suspensions is of great importance in many potential applications of GO, such as GO-based laminated membranes used for separation, printable electronics, and aqueous liquid crystals.Molecular dynamics (MD) simulations and quantum chemistry (QC) calculations along with complementary experiments were performed to study the dispersion stabilit ...
DOI:
10.1016/j.jcis.2020.03.036

13. NaCl recovery from organic pollutants-containing salt waste via dual effects of aqueous two-phase systems (ATPS) and crystal regulation with acetone

Author:
Li, Jing; Zheng, Jiayi; Peng, Xiaoqian; Dai, Zongren; Liu, Weizhen; Deng, Hong; Xi, Beidou; Lin, Zhang
Source:
Journal of cleaner production 2020 v.260 pp. 121044
ISSN:
0959-6526
Subject:
acetone,   etc   ; Fourier transform infrared spectroscopy; chlorine; crystallization; crystals; environmental hazards; hazardous waste; pollutants; pollution control; pyridines;     Show all 10 Subjects
Abstract:
... A large amount of salt waste accompanied with contaminants (e.g., organic pollutants) is produced in chemical production process, causing serious environmental hazards and waste of salt resources. However, there have been few satisfactory treatments for this hazardous waste until now. In this work, a novel strategy for NaCl recovery and organic pollutants removal from the salt waste containing pyr ...
DOI:
10.1016/j.jclepro.2020.121044

14. Carbon nanodots for ultrasensitive fluorescent detection of aqueous acetone based on synergistic electron and energy transfer

Author:
Sai, Liman; Ding, Meijuan; Zhou, Xinge; Chang, Quanhong; Huang, Lei
Source:
Colloids and surfaces 2020 v.595 pp. 124677
ISSN:
0927-7757
Subject:
acetone,   etc   ; aqueous solutions; beta-lactoglobulin; carbon; detection limit; electron transfer; energy transfer; fluorescence; nanotechnology;     Show all 9 Subjects
Abstract:
... Sensing of acetone in aqueous solution is important for both environmental and medical applications. However, current probes suffer from low sensitivity and a slow response. In this work, carbon nanodots (CNDs) derived from β-Lactoglobulin were developed for highly sensitive detection of aqueous acetone. The CNDs possessed both spectral matching and surface recognition sites toward acetone. Select ...
DOI:
10.1016/j.colsurfa.2020.124677

15. Sources of oxygenated volatile organic compounds (OVOCs) in urban atmospheres in North and South China

Author:
Huang, Xiao-Feng; Zhang, Bin; Xia, Shi-Yong; Han, Yu; Wang, Chuan; Yu, Guang-He; Feng, Ning
Source:
Environmental pollution 2020 v.261 pp. 114152
ISSN:
0269-7491
Subject:
acetone,   etc   ; acetaldehyde; aerosols; emissions; formaldehyde; methanol; ozone; photochemistry; pollution; spectroscopy; summer; volatile organic compounds; China;     Show all 13 Subjects
Abstract:
... Oxygenated volatile organic compounds (OVOCs) are critical precursors of atmospheric ozone (O₃) and secondary organic aerosols (SOA). Although China is experiencing increasing O₃ pollution from north to south, understanding the major sources of OVOCs in this region is still limited due to their active photochemical behaviors. In this study, five critical OVOCs at a northern urban site (Beijing) an ...
DOI:
10.1016/j.envpol.2020.114152

16. Diverse effects of aqueous polar co-solvents on Candida antarctica lipase B

Author:
Mangiagalli, Marco; Carvalho, Henrique; Natalello, Antonino; Ferrario, Valerio; Pennati, Matteo Luigi; Barbiroli, Alberto; Lotti, Marina; Pleiss, Juergen; Brocca, Stefania
Source:
International journal of biological macromolecules 2020 v.150 pp. 930-940
ISSN:
0141-8130
Subject:
acetone,   etc   ; Pseudozyma antarctica; biocatalysis; carboxylic ester hydrolases; dimethyl sulfoxide; methanol; molecular dynamics; simulation models; solvents;     Show all 9 Subjects
Abstract:
... Biocatalysis in mixtures of water and co-solvents represents an opportunity to expand the application of enzymes. However, in the presence of organic solvents, enzymes can undergo reversible inhibition, inactivation, or aggregation.In this work, we studied the effects of three co-solvents (methanol, acetone, and dimethyl sulfoxide - DMSO) on the function and structure of the recombinant Candida an ...
DOI:
10.1016/j.ijbiomac.2020.02.145

17. Online monitoring of end-tidal propofol in balanced anesthesia by anisole assisted positive photoionization ion mobility spectrometer

Author:
Jiang, Dandan; Chen, Chuang; Wang, Xin; Li, Mei; Xiao, Yao; Liu, Yiping; Li, Enyou; Li, Haiyang
Source:
Talanta 2020 v.211 pp. 120712
ISSN:
0039-9140
Subject:
acetone,   etc   ; blood; depth of anesthesia; humidity; monitoring; patients; sevoflurane; spectrometers; standard deviation; stomach neoplasms; surgery;     Show all 11 Subjects
Abstract:
... Online measuring end-tidal propofol concentration during balanced anesthesia is important for anesthetists to learn the patient's anesthesia depth as exhaled propofol concentration is well related to blood propofol concentration. In previous work, exhaled propofol was detected using acetone assisted negative photoionization ion mobility spectrometer, however, the existence of high concentration se ...
DOI:
10.1016/j.talanta.2020.120712

18. Toward closed loop recycling of polyester fabric: Step 1. decolorization using sodium formaldehyde sulfoxylate

Author:
Fei, Xiuzhu; Freeman, Harold S.; Hinks, David
Source:
Journal of cleaner production 2020 v.254 pp. 120027
ISSN:
0959-6526
Subject:
acetone,   etc   ; decolorization; dyes; fabrics; formaldehyde; landfills; polyethylene terephthalates; recycling; temperature; viscosity;     Show all 10 Subjects
Abstract:
... Although polyethylene terephthalate (PET) fibers comprise the largest single fiber type used in the global textile community, recycling of dyed PET-based fabric is limited, resulting in the disposal of considerable amounts of PET fabric in landfills every year. Because PET does not readily biodegrade, interest in recycling some or all of the dyed textiles derived from this substrate is of interest ...
DOI:
10.1016/j.jclepro.2020.120027

19. An extended duration operation for solid hollow fiber membrane-based cooling crystallization

Author:
Jin, Chi; Chen, Dengyue; Sirkar, Kamalesh K.; Pfeffer, Robert
Source:
Powder technology 2020 v.365 pp. 106-114
ISSN:
0032-5910
Subject:
acetone,   etc   ; coatings; crystallization; crystals; drugs; encapsulation; nanoparticles; polymers; powders; scanning electron microscopy; silica; solvents; thermogravimetry; volatilization;     Show all 14 Subjects
Abstract:
... It was recently demonstrated that the technique of solid hollow fiber membrane-based cooling crystallization can be employed to achieve continuous polymer precipitation from a solution and subsequent polymer coating/encapsulation of sub-micrometer particles/drug crystals as well as nanoparticles in suspension. In this technique, there is no need for high pressure as in supercritical solvent-based ...
DOI:
10.1016/j.powtec.2019.04.010

20. Electrical-driven self-heat recuperative pressure-swing azeotropic distillation to minimize process cost and CO2 emission: Process electrification and simultaneous optimization

Author:
Cui, Chengtian; Long, Nguyen Van Duc; Sun, Jinsheng; Lee, Moonyong
Source:
Energy 2020 v.195 pp. 116998
ISSN:
0360-5442
Subject:
acetone,   etc   ; carbon dioxide; chemical industry; chloroform; distillation; ecosystem services; greenhouse gas emissions; heat; heat pumps; tetrahydrofuran;     Show all 10 Subjects
Abstract:
... Azeotropic separation by pressure-swing distillation (PSD) is one of the most costly processes in the chemical industry. To minimize process cost and CO₂ emission, process electrification based on self-heat recuperation technology (SHRT) has been implemented in many thermal-driven processes. Enlightened by these facts, a novel electrical-driven PSD-SHRT process is proposed and compared with conven ...
DOI:
10.1016/j.energy.2020.116998