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1. Influence of Factorially Combined Levels of Cations and Nitrate Ions Adsorbed on Ion-Exchange Resins on the Nutrient Absorption by Plants

Author:
H. V. Welch; A. Wallace; R. T. Mueller
Source:
Soil Science Society of America journal 1954 v.18 no.2 pp. 137-140
ISSN:
0361-5995
Subject:
absorption; anions; balance sheet; cation exchange capacity; cations; grain yield; ion exchange; ion exchange resins; lemons; magnesium; nitrate nitrogen; nitrates; nutrient uptake; nutrients; oats; potassium; radishes; roots
Abstract:
... The interaction of different levels of cations and nitrate nitrogen adsorbed on synthetic exchange resins upon nutrient absorption by plants was studied in a pot experiment. A factorial design of three levels of cations and three of N was used. Ca, Mg, and K were supplied at the same ratio at all three levels and P and S were unvaried. Three successive plantings were made. These were lemon cutting ...
DOI:
10.2136/sssaj1954.03615995001800020006x

2. Interaction of Acid -Treated Wool and Silk with Water Vapor and Water

Author:
Arthur F. Cacella; Howard J. White
Source:
Textile research journal 1955 v.25 no.6 pp. 506-516
ISSN:
0040-5175
Subject:
absorption; anions; electrical resistance; fabrics; hairs; oxalic acid; relative humidity; silk; sulfuric acid; textile fibers; water vapor; wool
Abstract:
... Extensive results are given on the effects of HCI and picric acid on the capacity of wool to absorb water. Both the effect of changing the relative humidity and the effect of changing the acid content of the fibers were studied. Less extensive results were obtained using H₂SO₄, oxalic acid, and Orange II acid and salt on wool, and HC1 on silk. Collateral measurements were also made on the swelling ...
DOI:
10.1177/004051755502500603

3. Effect of Macronutrient Ions on the Availability of Iron from a Chelated Source

Author:
J. J. Oertli; A. A. Opoku
Source:
Soil Science Society of America journal 1974 v.38 no.4 pp. 597-602
ISSN:
0361-5995
Subject:
Zea mays; absorption; anions; calcium; cations; chlorides; ethylenediamines; iron; ligands; long term experiments; magnesium; nitrates; nutrient solutions; pH; potassium; roots; sodium; sulfates
Abstract:
... The uptake of Fe from FeEDDHA [ferric chelate of ethylenediamine di (o-hydroxyphenylacetic acid)] during periods of 1 to 2 days was studied with 10- to 11-day-old corn plants (Zea mays L.) grown in nutrient solutions. The Fe in roots and tops was markedly affected by the composition of the nutrient solution. Cations stimulated Fe in plants in the following order: K> Na > Mg > Ca, and anions SO₄ > ...
DOI:
10.2136/sssaj1974.03615995003800040023x

4. A New Method for Simultaneous Measurement of Cl−, Br−, NO3−, SCN−, and I− at Sub‐ppm Levels in Ground Water

Author:
Klaus J. Stetzenbach; Glenn M. Thompson
Source:
Ground water 1983 v.21 no.1 pp. 36-41
ISSN:
0017-467X
Subject:
absorption; anion exchange; anions; bromides; chlorides; detection limit; groundwater; high performance liquid chromatography; iodides; nitrates; thiocyanates
Abstract:
... Ion‐exchange high performance liquid chromatography coupled with ultraviolet absorption detection is shown to be a rapid and sensitive method for analysis of some common anions in water. Sensitivity of measurement is approximately 50 ppb for NO⁻₂, NO⁻₃, Br⁻, I⁻, and SCN⁻ while Cl⁻ has a detection limit in the one to ten ppm range. Chromatograms require 8 to 13 minutes to complete. Analyses are per ...
DOI:
10.1111/j.1745-6584.1983.tb00702.x

5. Partial Stabilization of Cucumber Mosaic Virus (CMV) Induced by a Clay Mineral

Author:
P. Piazzolla
Source:
Phytopathologische Zeitschrift 1989 v.124 no.2 pp. 97-100
ISSN:
0931-1785
Subject:
Cucumber mosaic virus; absorption; anions; cations; clay; lakes; plant viruses; rivers; sediments; vermiculite
Abstract:
... In recent years several reports have been published on the presence of infective plant viruses in the waters of rivers and lakes. Among them, it is interesting the presence of cucumber mosaic virus (CMV). To explain the reasons of the survival of this virus in conditions surely not optimal for its stability, the existence of a stabilization effect was hypothesized because of the sediments present ...
DOI:
10.1111/j.1439-0434.1989.tb04900.x

6. Effect of sodium and ammonium salts on tralkoxydim absorption in oat

Author:
McMullan, P.M.
Source:
Canadian journal of plant science 1996 v.76 no.1 pp. 119-122
ISSN:
0008-4220
Subject:
Avena sativa; anions; ion transport; absorption; sodium bicarbonate; dose response; ammonium sulfate; pH
DOI:
10.4141/cjps96-018

7. Micro‐scale variation of solid‐phase properties and soil solution chemistry in a forest podzol and its relation to soil horizons

Author:
A. GÖTTLEIN; H. STANJEK
Source:
European journal of soil science 1996 v.47 no.4 pp. 627-636
ISSN:
1351-0754
Subject:
absorption; aluminum; anions; buffers; forests; isogenic lines; pH; soil horizons; soil properties; soil sampling; soil solution; solutes; titration
Abstract:
... In order to evaluate micro‐scale heterogeneities 55 micro suction cups were placed in an array at 15 mm intervals in a profile face of a cambic podzol. The chemistry of soil solution (mineral anions, pH, UV absorption as a measure for DOC) was compared with solid‐phase properties from soil samples (2 cm3 volume), which had surrounded the suction cups. Sequential extraction techniques (water, NF4Cl ...
DOI:
10.1111/j.1365-2389.1996.tb01861.x

8. EXAFS study of chromated copper arsenate timber preservative in wood

Author:
David C. Bull; Peter W. Harland; Claire Vallance; Garry J. Foran
Source:
Journal of wood science 2000 v.46 no.3 pp. 248-252
ISSN:
1435-0211
Subject:
Pinus radiata; copper; absorption; depth; lumber; anions; spectral analysis; chromium; copper arsenate
Abstract:
... Copper and arsenic K-edge X-ray absorption fine structure spectroscopy (EXAFS) of pine wood (Pinus radiata) treated with chromated copper arsenate (CCA) timber preservative have been measured. Refinement of the data is consistent with arsenate anions bound to chromium and copper ions isolated from other heavy elements, regardless of depth into the wood. This constitutes the first substantive analy ...
DOI:
10.1007/BF00776457

9. Roles of peritrophic membranes in protecting herbivorous insects from ingested plant allelochemicals. [Erratum: June 2002, v. 50 (2), p. 107.]

Author:
Barbehenn, R.V.
Source:
Archives of insect biochemistry and physiology 2001 v.47 no.2 pp. 86-99
ISSN:
0739-4462
Subject:
insects; food plants; allelochemicals; tannins; peritrophic membrane; membrane permeability; absorption; adsorption; anions; oxidation; defense mechanisms
Abstract:
... Four mechanisms by which peritrophic membranes (PMs) potentially protect herbivorous insects from ingested allelochemicals are reviewed: adsorption, ultrafiltration, polyanion exclusion, and the capacity of PMs to act as antioxidants. Most of the research on the protective roles of PMs against ingested allelochemicals has focused on their impermeability to tannins. Adsorption of tannins by the PMs ...
DOI:
10.1002/arch.1039

10. Phosphate and Sulfate Sorption in Spodosols with Albic Horizon from Northern Spain

Author:
M. Camps Arbestain; M. E. Barreal; F. Macías
Source:
Soil Science Society of America journal 2002 v.66 no.2 pp. 464-473
ISSN:
0361-5995
Subject:
B horizons; Spodosols; absorption; aluminum; anions; iron; oxalates; pH; potassium dihydrogen phosphate; potassium sulfate; silicon; Spain
Abstract:
... The affinity of PO₄ and SO₄ for reactive Al and Fe compounds may differ between the Bh and Bs horizons of Spodosols. Sorption of SO₄ and PO₄ in soils was investigated in four Spodosols from Northern Spain. Sorption experiments were carried out by adding 1.6 and 16.1 mM KH₂PO₄ or 0.4 and 1.6 mM K₂SO₄ to soils (soil/solution, 1:10). Most (98.5–99.8%) of the PO₄ added at 1.6 mM was retained by the il ...
DOI:
10.2136/sssaj2002.4640

11. Insight into the mechanism of short chain fatty acid absorption in the ostrich (Struthio camelus) proximal colon

Author:
Musara, C.; Chamunorwa, J.; Holtug, K.; Skadhauge, E.
Source:
British poultry science 2003 v.44 no.2 pp. 316-326
ISSN:
0007-1668
Subject:
absorption; acetazolamide; anions; carbon dioxide; carbonate dehydratase; colon; hydrogen; hydrogen ions; hypoxia; ostriches; ouabain; propionic acid; secretion; short chain fatty acids
Abstract:
... 1. Occurrence of short chain fatty acids (SCFA) in anionic form limits their diffusion across the absorptive membrane. The present study sought to establish the mechanism of SCFA absorption in the ostrich. 2. Epithelial tissues were taken from the sacculated part of the colon and mounted in Ussing chambers in a bathing solution. The tissues were voltage-clamped and allowed to equilibrate to obtain ...
DOI:
10.1080/0007166031000088352
PubMed:
12828218

12. Characterization of Excess Electrons in Water-Cluster Anions by Quantum Simulations

Author:
Turi, László; Sheu, Wen-Shyan; Rossky, Peter J.
Source:
Science 2005 v.309 no.5736 pp. 914-917
ISSN:
0036-8075
Subject:
absorption; anions; electrons; uncertainty
Abstract:
... Water-cluster anions can serve as a bridge to understand the transition from gaseous species to the bulk hydrated electron. However, debate continues regarding how the excess electron is bound in (H2O)-n, as an interior, bulklike, or surface electronic state. To address the uncertainty, the properties of (H2O)-n clusters with 20 to 200 water molecules have been evaluated by mixed quantum-classical ...
DOI:
10.1126/science.1115808

13. Effect of selected Hofmeister anions on functional properties of protein isolate prepared from lablab seeds (Lablab purpureus)

Author:
Lawal, O.S.; Afolabi, T.A.; Adebowale, K.O.; Ogunsanwo, B.M.; Bankole, S.A.
Source:
Journal of the science of food and agriculture 2005 v.85 no.15 pp. 2655-2659
ISSN:
0022-5142
Subject:
protein isolates; aqueous solutions; seeds; Lablab purpureus; absorption; foaming capacity; anions; water; emulsifying properties
Abstract:
... Effects of selected Hofmeister anions, namely Na2SO4, NaCl, NaBr, NaI, NaClO4 and NaSCN, on the functional properties of a protein isolate prepared from lablab seeds (Lablab purpureus) were investigated. The results of water absorption capacity indicated that highest water absorption was recorded in solutions of Na2SO4, and the lowest in NaSCN solutions. Reduction in water absorption capacity foll ...
DOI:
10.1002/jsfa.2334

14. CO₂ absorption by aqueous NH₃ solutions: speciation of ammonium carbamate, bicarbonate and carbonate by a ¹³C NMR study

Author:
Fabrizio Mani; Maurizio Peruzzini; Piero Stoppioni
Source:
Green chemistry 2006 v.8 no.11 pp. 995-1000
ISSN:
1463-9270
Subject:
absorption; ambient temperature; ammonia; ammonium; ammonium salts; anions; atmospheric pressure; bicarbonates; carbon; carbon dioxide; carbonates; green chemistry; nuclear magnetic resonance spectroscopy; stable isotopes
Abstract:
... The absorption of CO₂ in aqueous NH₃ solutions occurs with high efficiency and loading capacity at room temperature and atmospheric pressure producing the ammonium salts of bicarbonate (HCO₃⁻), carbonate (CO₃²⁻), and carbamate (NH₂CO₂⁻) anions. ¹³C NMR spectroscopy at room temperature has been proven to be a simple and reliable method to investigate the speciation in solution of these three ionic ...
DOI:
10.1039/b602051h

15. Application of solid-phase microextraction in analytical toxicology

Author:
Pragst, Fritz
Source:
Analytical and bioanalytical chemistry 2007 v.388 no.7 pp. 1393-1414
ISSN:
1618-2642
Subject:
absorption; adsorption; alcohols; amphetamines; anions; antidepressants; benzodiazepines; blood; boiling; breathing; cannabinoids; cations; coatings; cocaine; cyanides; derivatization; electrochemistry; esters; fatty acids; forensic sciences; gas chromatography; headspace analysis; hematologic tests; high performance liquid chromatography; metabolites; metal ions; methadone; pesticides; phenothiazines; polymers; samplers; screening; solid phase microextraction; solvents; sulfides; toxicology; urine
Abstract:
... Solid-phase microextraction (SPME) is a miniaturized and solvent-free sample preparation technique for chromatographic-spectrometric analysis by which the analytes are extracted from a gaseous or liquid sample by absorption in, or adsorption on, a thin polymer coating fixed to the solid surface of a fiber, inside an injection needle or inside a capillary. In this paper, the present state of practi ...
DOI:
10.1007/s00216-007-1289-9

16. Electromagnetic and chemical interaction between Ag nanoparticles and adsorbed rhodamine molecules in surface-enhanced Raman scattering

Author:
Futamata, M.; Maruyama, Y.
Source:
Analytical and bioanalytical chemistry 2007 v.388 no.1 pp. 89-102
ISSN:
1618-2642
Subject:
Raman spectroscopy; absorption; anions; cations; chlorides; fluorescence; nanosilver; silver; thiosulfates
Abstract:
... The critical importance of the junction between touching or closely adjacent Ag nanoparticles associated with single-molecule sensitivity (SMS) in surface-enhanced Raman scattering (SERS) was confirmed via the following observations: (1) an additional peak is observed in elastic scattering only for the SERS-active state, which originated from absorption of adsorbates, (2) local- and far-field eval ...
DOI:
10.1007/s00216-007-1183-5
PubMed:
17333146

17. Influence of different calcium contents in diets supplemented with anionic salts on bone metabolism in periparturient dairy cows

Author:
Liesegang, A.; Chiappi, C.; Risteli, J.; Kessler, J.; Hess, H.D.
Source:
Journal of animal physiology and animal nutrition 2007 v.91 no.3-4 pp. 120
ISSN:
0931-2439
Subject:
absorption; acidosis; anions; blood serum; bone formation; bone resorption; calcium; dairy cows; dietary cation anion difference; dietary supplements; gastrointestinal system; homeostasis; lactation; magnesium; metabolism; milk fever; pH; parturition; pregnancy; salts; urine
Abstract:
... At the initiation of lactation, Ca homeostatic mechanisms have to react to a tremendous increase in demand for Ca. Mobilization of Ca from bone and increased absorption from the gastrointestinal tract are required to re-establish homeostasis. It has been shown that dietary anions play an important role in the prevention of milk fever by mobilizing Ca from bone and by increasing Ca absorption in th ...
DOI:
10.1111/j.1439-0396.2006.00651.x

18. Osmotic adjustment and ion balance traits of an alkali resistant halophyte Kochia sieversiana during adaptation to salt and alkali conditions

Author:
Chunwu Yang; Jianna Chong; Changyou Li; Changmin Kim; Decheng Shi; Deli Wang
Source:
Plant and soil 2007 v.294 no.1-2 pp. 263-276
ISSN:
0032-079X
Subject:
Bassia scoparia; Leymus chinensis; Puccinellia; absorption; anions; betaine; calcium; halophytes; inorganic ions; magnesium; nitrates; osmotic stress; physiological response; potassium; proline; salinity; salt stress; seedlings; shoots; sodium; sodium bicarbonate; sodium carbonate; sodium chloride; sodium sulfate; sugars; vacuoles; water content
Abstract:
... Kochia sieversiana (Pall.) C. A. M., a naturally alkali-resistant halophyte, was chosen as the test organism for our research. The seedlings of K. sieversiana were treated with varying (0-400 mM) salt stress (1:1 molar ratio of NaCl to Na₂SO₄) and alkali stress (1:1 molar ratio of NaHCO₃ to Na₂CO₃). The concentrations of various solutes in fresh shoots, including Na⁺, K⁺, Ca²⁺, Mg²⁺, Cl-, SO ₄ ²- ...
DOI:
10.1007/s11104-007-9251-3

19. Relation between the mode of binding of nitrite and the energy distribution between the two photosystems

Author:
Singh, Pooja; Jajoo, Anjana; Sahay, Archna; Bharti, Sudhakar
Source:
Physiologia plantarum 2007 v.129 no.2 pp. 447-454
ISSN:
0031-9317
Subject:
absorption; anions; antennae; chlorophyll; electron paramagnetic resonance spectroscopy; electron transfer; energy; fluorescence; nitrites; photosystem I; photosystem II; spinach; temperature; thylakoids
Abstract:
... The reversibility of nitrite-induced inhibition in relation to energy distribution between the two photosystems was studied in spinach thylakoid membranes. Measurements of electron transfer rate catalyzed by photosystem I (PS I) and photosystem II (PS II), chlorophyll a (Chl a) fluorescence induction kinetics, S₂ state multiline spectra, and room temperature electron paramagnetic resonance (EPR) s ...
DOI:
10.1111/j.1399-3054.2006.00808.x

20. Bile Acids: Chemistry, Pathochemistry, Biology, Pathobiology, and Therapeutics

Author:
Hofmann, A. F.; Hagey, L. R.
Source:
Cellular and molecular life sciences 2008 v.65 no.16 pp. 2461-2483
ISSN:
1420-682X
Subject:
G-protein coupled receptors; absorption; anions; anti-infective properties; bile; bile acids; bile salts; cholesterol; cholesterol metabolism; cytotoxicity; dietary protein; ileum; liver; liver diseases; therapeutics; vertebrates
Abstract:
... Bile acids and bile alcohols in the form of their conjugates are amphipathic end products of cholesterol metabolism with multiple physiological functions. The great variety of bile acids and bile alcohols that are present in vertebrates are tabulated. Bile salts have an enterohepatic circulation resulting from efficient vectorial transport of bile salts through the hepatocyte and the ileal enteroc ...
DOI:
10.1007/s00018-008-7568-6

21. Cationic hydrogels for toxic arsenate removal from aqueous environment

Author:
Barakat, M.A.; Sahiner, N.
Source:
Journal of environmental management 2008 v.88 no.4 pp. 955-961
ISSN:
0301-4797
Subject:
aqueous solutions; water quality; absorption; hydrocolloids; swelling (materials); cations; methodology; anions; arsenates; remediation; pH; hydrochemistry
DOI:
10.1016/j.jenvman.2007.05.003

22. Characterization of selective binding of alkali cations with carboxylate by x-ray absorption spectroscopy of liquid microjets

Author:
Uejio, Janel S.; Schwartz, Craig P.; Duffin, Andrew M.; Drisdell, Walter S.; Cohen, Ronald C.; Saykally, Richard J.
Source:
Proceedings of the National Academy of Sciences of the United States of America 2008 v.105 no.19 pp. 6809-6812
ISSN:
0027-8424
Subject:
X-radiation; X-ray absorption spectroscopy; absorption; acetates; anions; carbon; cations; formates; lithium; potassium; sodium
Abstract:
... We describe an approach for characterizing selective binding between oppositely charged ionic functional groups under biologically relevant conditions. Relative shifts in K-shell x-ray absorption spectra of aqueous cations and carboxylate anions indicate the corresponding binding strengths via perturbations of carbonyl antibonding orbitals. XAS spectra measured for aqueous formate and acetate solu ...
DOI:
10.1073/pnas.0800181105
PubMed:
18463292
PubMed Central:
PMC2383964

23. Decoupling of the processes of molecular oxygen synthesis and electron transport in Ca2+-depleted PSII membranes

Author:
Boris K. Semin; Lira N. Davletshina; Il’ya I. Ivanov; Andrei B. Rubin; Michael Seibert
Source:
Photosynthesis research 2008 v.98 no.1-3 pp. 235-249
ISSN:
0166-8595
Subject:
absorption; anions; calcium; chelating agents; electron transfer; electrons; ethylene glycol tetraacetic acid; fluorescence; manganese; oxidation; oxygen; pH; photosystem II; redox potential; sodium chloride; sodium citrate; sucrose
Abstract:
... Extraction of Ca²⁺ from the O₂-evolving complex (OEC) of photosystem II (PSII) membranes with 2 M NaCl in the light (PSII(–Ca/NaCl)) results in 90% inhibition of the O₂-evolution reaction. However, electron transfer from the donor to acceptor side of PSII, measured as the reduction of the exogenous acceptor 2,6-dichlorophenolindophenol (DCIP) under continuous light, is inhibited by only 30%. Thus, ...
DOI:
10.1007/s11120-008-9347-5

24. Erigeron annuus (L.) Pers., as a green manure for ameliorating soil exposed to acid rain in Southern China

Author:
Liu, Juxiu; Peng, Shanjiang; Faivre-vuillin, Benjamin; Xu, Zhihong; Zhang, Deqiang; Zhou, Guoyi
Source:
Journal of soils and sediments 2008 v.8 no.6 pp. 452-460
ISSN:
1439-0108
Subject:
Erigeron annuus; Phaseolus vulgaris; absorption; acid deposition; acid soils; aluminum; anions; calcium; crop yield; exchangeable calcium; exchangeable potassium; green manures; leaching; legumes; magnesium; manure spreading; mineralization; new species; nitrates; nitrogen; oxidation; planting; roots; seedlings; seeds; soil acidification; soil pH; soil sampling; toxicity; China
Abstract:
... Background, aims, and scope Increasing soil acidification is a growing concern in southern China. The traditional green manures applied in the fields mostly comprise legumes that tend to accelerate soil acidification. Moreover, acid deposition can act as a source of nitrogen. Hence, we looked for new plant species that would enhance nutrient concentrations when used as green manure and would reduc ...
DOI:
10.1007/s11368-008-0041-1

25. Molecular complex of lignosulfonic acid/poly(vinyl pyridine) via ionic interaction: characterization of chemical composition and application to material surface modifications

Author:
Daisuke Hasegawa; Yoshikuni Teramoto; Yoshiyuki Nishio
Source:
Journal of wood science 2008 v.54 no.2 pp. 143-152
ISSN:
1435-0211
Subject:
Fourier transform infrared spectroscopy; absorption; adhesion; anions; atomic force microscopy; cations; chemical composition; coatings; differential scanning calorimetry; dimethyl sulfoxide; glass transition temperature; hydrochloric acid; polymers; wood
Abstract:
... Poly ion complexes of anionic lignosulfonic acid (LSA) with cationic poly(2-vinyl pyridine) or poly(4-vinyl pyridine) were prepared by mixing the polymer solutions in dimethyl sulfoxide or dilute hydrochloric acid. The complexes were formed as soon as the polymer solutions were mixed. Fourier transform infrared (FTIR) measurements for the complexes revealed the presence of strong ionic interaction ...
DOI:
10.1007/s10086-007-0922-8

26. Synthesis of a Novel Ambipolar Resin Membrane for Ion Adsorption

Author:
Men, Y.; He, L.; Wu, Z.; Theng, B.K.G.; Miao, J.
Source:
Journal of plant nutrition 2008 v.31 no.4-6 pp. 731-742
ISSN:
0190-4167
Subject:
ion exchange resins; adsorption; cations; anions; water; absorption; cell membranes; nitrate nitrogen; ammonium nitrogen; potassium; phosphorus; aqueous solutions; desorption; hydrochloric acid; crosslinking; phosphates; soil analysis
Abstract:
... We have synthesized a novel composite ambipolar resin membrane with a high water absorption capacity (150-200%) and superior ion adsorption properties. The ambipolar membrane was capable of adsorbing nitrate, ammonium, potassium and phosphorus simultaneously from aqueous solutions. The adsorption capacity of the membrane varied with ionic concentration and composition. Thus, from a mixed solution ...

27. Uptake of grape anthocyanins into the rat kidney and the involvement of bilitranslocase

Author:
Vanzo, Andreja; Terdoslavich, Michela; Brandoni, Anabel; Torres, Adriana M.; Vrhovsek, Urska; Passamonti, Sabina
Source:
Molecular nutrition & food research 2008 v.52 no.10 pp. 1106-1116
ISSN:
1613-4125
Subject:
Vitis vinifera; absorption; anions; anthocyanins; bioavailability; blood; cardiovascular diseases; diet; excretion; grapes; inflammation; kidney cells; kidneys; liver; malvidin; metabolism; obesity; rats; stomach; tissue distribution; transporters
Abstract:
... Anthocyanins are among the most common flavonoids in the human diet. In spite of their very low bioavailability, anthocyanins are indicated as active in preventing the progress of cardiovascular and neurodegenerative diseases, obesity, inflammation, and cancer. Any piece of knowledge concerning absorption, tissue distribution, metabolism, and excretion of dietary anthocyanins is expected to help u ...
DOI:
10.1002/mnfr.200700505
PubMed:
18655007

28. A highly sensitive spectrophotometric determination of micro amounts of vanadium(V) in environmental and alloy samples by using 3,4-dihydroxybenzaldehydeisonicotinoylhydrazone (3,4-DHBINH)

Author:
S. Lakshmi Narayana; K. Janardhan Reddy; S. Adi Narayana Reddy; Y. Sarala; A. Varada Reddy
Source:
Environmental monitoring and assessment 2008 v.144 no.1-3 pp. 341-349
ISSN:
0167-6369
Subject:
absorbance; absorption; acetates; alloys; anions; atomic absorption spectrometry; cations; detection limit; leaves; pH; sampling; soil water; spectral analysis; tobacco; vanadium; wavelengths
Abstract:
... 3, 4-Dihydroxybenzaldehydeisonicotinoylhydrazone was prepared, characterized with spectral analyses and used for developing a new method for the simple, sensitive and rapid spectrophotometric determination of vanadium(V) which gives maximum absorbance at wave length 360 nm. The metal ion gives a yellow colored complex with 3, 4-DHBINH in acetate buffer of pH 5.5 with 1:1 (metal:ligand) composition ...
DOI:
10.1007/s10661-007-9997-3

29. Absorption of the selenite anion from aqueous solutions by thermally activated layered double hydroxide

Author:
Liu, Rui; Frost, Ray L.
Source:
Water research 2009 v.43 no.5 pp. 1323-1329
ISSN:
0043-1354
Subject:
selenites; drinking water; anions; absorption; water treatment; hydroxides; water pollution; magnesium; aluminum; Raman spectroscopy
DOI:
10.1016/j.watres.2008.12.030
PubMed:
19157487

30. Characterisation of bauxite and seawater neutralised bauxite residue using XRD and vibrational spectroscopic techniques

Author:
Sara J. Palmer; Ray L. Frost
Source:
Journal of materials science 2009 v.44 no.1 pp. 55-63
ISSN:
0022-2461
Subject:
Raman spectroscopy; X-ray diffraction; absorption; alkalinity; aluminum; aluminum hydroxide; aluminum oxide; anions; bauxite; calcium; carbonate minerals; carbonates; iron; magnesium; near-infrared spectroscopy; seawater; silica; temperature; titanium
Abstract:
... Bauxite refinery residues are derived from the Bayer process by the digestion of crushed bauxite in concentrated caustic at elevated temperatures. Chemically, it comprises, in varying amounts (depending upon the composition of the starting bauxite), oxides of iron and titanium, residual alumina, sodalite, silica, and minor quantities of other metal oxides. Bauxite residues are being neutralised by ...
DOI:
10.1007/s10853-008-3123-y

31. Biogenic N-P-codoped TiO₂: Synthesis, characterization and photocatalytic properties

Author:
Han, Ting; Fan, Tongxiang; Chow, Suk-Kwun; Zhang, Di
Source:
Bioresource technology 2010 v.101 no.17 pp. 6829-6835
ISSN:
0960-8524
Subject:
X-ray diffraction; X-ray photoelectron spectroscopy; absorption; anions; cations; crops; crystals; irradiation; lamps; metals; nitrogen; oxides; phosphorus; red light; seeds
Abstract:
... Four typical kinds of crop seeds are studied as non-metallic bio-precursors to synthesize biogenic N-P-codoped TiO₂ (BNP-TiO₂). The as-prepared BNP-TiO₂ samples are characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), nitrogen-adsorption measurement and UV-Vis spectroscopy. The results show that BNP-TiO₂ possesses single anatase phase with mesopore structures, and nitr ...
DOI:
10.1016/j.biortech.2010.03.107

32. Colorimetric naked-eye recognizable anion sensors synthesized via RAFT polymerization

Author:
Jiang, Jianbing; Xiao, Xiao; Zhao, Ping; Tian, He
Source:
Journal of polymer science 2010 v.48 no.7 pp. 1551-1556
ISSN:
0887-624X
Subject:
absorption; acetates; anions; bromides; chlorides; colorimetry; fluorides; iodides; molecular weight; nuclear magnetic resonance spectroscopy; phosphates; polymerization; polymers; thiourea; titration
Abstract:
... A polymeric sensor (PTH) containing naphthalimide signal moiety and thiourea recognition moiety for the detection of anions was synthesized by reversible addition-fragmentation chain transfer (RAFT) polymerization, which can guarantee controllable molecular weight, narrow molecular weight distribution, and precise polymer structure. Both PTH and its corresponding monomer (TH) showed naked-eye reco ...
DOI:
10.1002/pola.23922

33. Facile syntheses, morphologies, and optical absorptions of P3HT coil-rod-coil triblock copolymers

Author:
Lim, Herman; Huang, Kuo-Tung; Su, Wei-Fang; Chao, Chi-Yang
Source:
Journal of polymer science 2010 v.48 no.15 pp. 3311-3322
ISSN:
0887-624X
Subject:
absorption; anions; chemical structure; composite polymers; molecular weight; polymethylmethacrylate; polystyrenes; solvents
Abstract:
... Here we report syntheses, photophysical properties, and morphologies of a series of coil-rod-coil ABA triblock copolymers containing highly regioregular poly(3-hexylthiophene) (P3HT) as the central rod block. A new methodology, based on the coupling reaction between living polymeric anions [polystyrene, polyisoprene, and poly(methyl methacrylate)] and aldehyde terminated P3HT, was successfully dev ...
DOI:
10.1002/pola.24115

34. Optimising diquat use for submerged aquatic weed management

Author:
John Clayton; Fleur Matheson
Source:
Hydrobiologia 2010 v.656 no.1 pp. 159-165
ISSN:
0018-8158
Subject:
absorption; adsorption; anions; aquatic weeds; chlorophyll; diquat; lakes; leaves; particle size; prediction; risk; surface water; total suspended solids; turbidity; water quality; weed control; New Zealand
Abstract:
... An experimentally derived prediction tool is under development which aims to assess potential deactivation of diquat caused by water and deposits on plant leaf surfaces in New Zealand water bodies, where aquatic weeds are targeted for diquat treatment. Optimising the use and success of diquat is important not only in managing public confidence in the use of aquatic herbicides, but also in minimisi ...
DOI:
10.1007/s10750-010-0423-4

35. Physiological characteristics of selenite uptake by maize roots in response to different pH levels

Author:
Zhang, Lianhe; Yu, Feiyan; Shi, Weiming; Li, Youjun; Miao, Yanfang
Source:
Zeitschrift für Pflanzenernährung und Bodenkunde 2010 v.173 no.3 pp. 417-422
ISSN:
1436-8730
Subject:
Zea mays; absorption; anions; corn; pH; roots; seedlings; sodium fluoride; temperature
Abstract:
... In selenite solutions, H₂SeO₃, HSeO$ _3^- $, and SeO<$>_3^{2-}<$> are in equilibrium in proportions that vary with solution pH. The physiological characteristics of selenite uptake were studied with excised roots of maize (Zea mays L.) seedlings at pH 3.0, 5.0, and 8.0. The results showed that 0.10 mM 2,4-dinitrophenol (DNP), 1.0 mM sodium fluoride (NaF), and a temperature of 4°C inhibited selenit ...
DOI:
10.1002/jpln.200900260

36. Preparation and evaluation of solid-phase microextraction fibres based on functionalized latex nanoparticle coatings for trace analysis of inorganic anions

Author:
Kaykhaii, Massoud; Dicinoski, Greg W.; Smedley, Rebecca; Pawliszyn, Janusz; Haddad, Paul R.
Source:
Journal of chromatography 2010 v.1217 no.20 pp. 3452-3456
ISSN:
0021-9673
Subject:
absorption; anions; chromatography; coatings; detection limit; ionization; latex; nanoparticles; solid phase microextraction
Abstract:
... The use of a functionalized latex nanoparticle coating as a new sorbent phase for solid-phase microextraction (SPME) was examined. By means of electrostatic absorption onto ionized silanol groups, a fused-silica rod was coated with polymeric nanoparticles functionalized with quaternary ammonium groups. Optimum conditions for the preparation of the coated fibre are presented. The fibre was used for ...
DOI:
10.1016/j.chroma.2010.03.047

37. Transport of cations and anions across forestomach epithelia: conclusions from in vitro studies

Author:
Leonhard-Marek, S.; Stumpff, F.; Martens, H.
Source:
Animal 2010 v.4 no.7 pp. 1037-1056
ISSN:
1751-7311
Subject:
ammonia; ion channels; absorption; ion transport; nutrient uptake; omasum; cations; rumen epithelium; magnesium; anions; bicarbonates; short chain fatty acids; in vitro studies; biochemical mechanisms; ruminants
Abstract:
... Secretion of saliva as well as absorptive and secretory processes across forestomach epithelia ensures an optimal environment for microbial digestion in the forestomachs. Daily salivary secretion of sodium (Na+) exceeds the amount found in plasma by a factor of 2 to 3, while the secretion of bicarbonate (HCO3−) is 6 to 8 times higher than the amount of HCO3− in the total extracellular space. This ...
DOI:
10.1017/S1751731110000261
PubMed:
22444608

38. 3-Urea-1,8-naphthalimides are good chemosensors: a highly selective dual colorimetric and fluorescent ICT based anion sensor for fluoride

Author:
Rebecca M. Duke; Thorfinnur Gunnlaugsson
Source:
Tetrahedron letters 2011 v.52 no.13 pp. 1503-1505
ISSN:
0040-4039
Subject:
absorption; acetates; anions; chemical reactions; chemical structure; colorimetry; dimethyl sulfoxide; fluorides; urea
Abstract:
... The 1,8-naphthalimide sensor 1 was developed as a colorimetric and fluorescent sensor for anions. Being the first example of such anion sensors, where the 3-position of the naphthalimide ring is used to incorporate the anion recognition moiety, in this case a trifluromethyl derived aryl urea moiety, the sensors gave rise to significant changes in both the absorption and the emission spectra, which ...
DOI:
10.1016/j.tetlet.2011.01.099

39. CO₂ chemistry: task-specific ionic liquids for CO₂ capture/activation and subsequent conversion

Author:
Zhen-Zhen Yang; Ya-Nan Zhao; Liang-Nian He
Source:
RSC advances 2011 v.1 no.4 pp. 545-567
ISSN:
2046-2069
Subject:
absorbents; absorption; anions; carbon dioxide; carbon sequestration; carbonates; catalysts; catalytic activity; cations; desorption; energy; formic acid; heat; ionic liquids; oxazolidinones; urea
Abstract:
... Ionic liquids (ILs), a kind of novel green medium composed entirely of cations and anions, have attracted considerable attention due to their unique properties such as non-volatility, tunable polarity, high stability and so on. In this article, the latest progress on the absorption and subsequent conversion of CO₂ by using ILs as absorbents, catalysts or promoters will be summarized. The chemical ...
DOI:
10.1039/c1ra00307k

40. Colorimetric response of spiropyran derivative for anions in aqueous or organic media

Author:
Yasuhiro Shiraishi; Masataka Itoh; Takayuki Hirai
Source:
Tetrahedron 2011 v.67 no.5 pp. 891-897
ISSN:
0040-4020
Subject:
absorption; anions; chemical reactions; chemical structure; colorimetry; cyanides; fluorides; organic compounds; pH; quantitative analysis; stoichiometry; ultraviolet radiation; water content
Abstract:
... We previously found that a simple spiropyran derivative (1:1′,3′,3′-trimethyl-6-nitro-spiro-[2H-1-benzopyran-2,2′-indoline]) behaves as a selective and sensitive cyanide anion (CN⁻) receptor in aqueous media under UV irradiation¹³. The receptor, when irradiated by UV light in a water/MeCN mixture, creates a CN⁻-selective absorption band via a nucleophilic addition of CN⁻ to 1 (formation of the 1–C ...
DOI:
10.1016/j.tet.2010.12.021

41. Determination of As(III) and total inorganic As in water samples using an on-line solid phase extraction and flow injection hydride generation atomic absorption spectrometry

Author:
Mirna Sigrist; Antonela Albertengo; Horacio Beldoménico; Mabel Tudino
Source:
Journal of hazardous materials 2011 v.188 no.1-3 pp. 311-318
ISSN:
0304-3894
Subject:
absorption; anion exchange; anions; arsenic; atomic absorption spectrometry; chlorides; detection limit; filters; groundwater; hydrides; hydrochloric acid; nitrates; oxygen; quartz; reducing agents; sodium hydroxide; solid phase extraction; toxicity; water quality
Abstract:
... A simple and robust on-line sequential injection system based on solid phase extraction (SPE) coupled to a flow injection hydride generation atomic absorption spectrometer (FI-HGAAS) with a heated quartz tube atomizer (QTA) was developed and optimized for the determination of As(III) in groundwater without any kind of sample pretreatment. The method was based on the selective retention of inorgani ...
DOI:
10.1016/j.jhazmat.2011.01.126

42. Development of a boron-dipyrromethene-Cu²⁺ ensemble based colorimetric probe toward hydrogen sulfide in aqueous media

Author:
Xianfeng Gu; Chunhua Liu; Yi-Chun Zhu; Yi-Zhun Zhu
Source:
Tetrahedron letters 2011 v.52 no.39 pp. 5000-5003
ISSN:
0040-4039
Subject:
absorption; anions; aqueous solutions; chemical reactions; chemical structure; colorimetry; dimethyl sulfoxide; hydrogen sulfide; pH; thiols
Abstract:
... A boron-dipyrromethene-Cu²⁺ ensemble based colorimetric probe for detection of hydrogen sulfide in aqueous media is reported. Complex 1–Cu(II) is able to selectively sense hydrogen sulfide over other anions and thiols followed by the release of compound 1 to give a remarkable change of UV absorption in aqueous solution (HEPES (4-(2-hydroxyethyl)-1-piperazineethanesulfonic acid) buffer, 50mM, pH 7. ...
DOI:
10.1016/j.tetlet.2011.07.004

43. Dimethyl phosphorothioate and phosphoroselenoate ionic liquids as solvent media for cellulosic materials

Author:
Michael Hummel; Carmen Froschauer; Gerhard Laus; Thomas Röder; Holger Kopacka; Lauri K. J. Hauru; Hedda K. Weber; Herbert Sixta; Herwig Schottenberger
Source:
Green chemistry 2011 v.13 no.9 pp. 2507-2517
ISSN:
1463-9270
Subject:
Eucalyptus globulus; absorption; anions; cations; desorption; gel chromatography; green chemistry; imidazoles; ionic liquids; kraft paper; molecular weight; pulp; salts; thermal degradation; thermal stability; thermogravimetry; xylan
Abstract:
... A series of novel ionic liquids comprising two asymmetric phosphate-derived anions, namely dimethyl phosphorothioate and dimethyl phosphoroselenoate, and several imidazolium and non-imidazolium-based cations was prepared via a facile synthetic route. Thermal degradation was studied by dynamic thermogravimetric analysis (TGA) revealing a slightly higher stability of the imidazolium ionic liquids an ...
DOI:
10.1039/c1gc15407a

44. Direct evidence for the ring opening of monosaccharide anions in the gas phase: photodissociation of aldohexoses and aldohexoses derived from disaccharides using variable-wavelength infrared irradiation in the carbonyl stretch region

Author:
Darin J. Brown; Sarah E. Stefan; Giel Berden; Jeffrey D. Steill; Jos Oomens; John R. Eyler; Brad Bendiak
Source:
Carbohydrate research 2011 v.346 no.15 pp. 2469-2481
ISSN:
0008-6215
Subject:
absorption; aldohexoses; anions; aqueous solutions; disaccharides; dissociation; energy; gases; irradiation; photolysis; solvents; spectral analysis; stereochemistry; wavelengths
Abstract:
... All eight d-aldohexoses and aldohexoses derived from the non-reducing end of disaccharides were investigated by variable-wavelength infrared multiple-photon dissociation (IRMPD) as anions in the negative-ion mode. Spectroscopic evidence supports the existence of a relatively abundant open-chain configuration of the anions in the gas phase, based on the observation of a significant carbonyl absorpt ...
DOI:
10.1016/j.carres.2011.06.018

45. Effects of various barium precursors and promoters on catalytic activity of Ba–Ti perovskite catalysts for oxidative coupling of methane

Author:
Maryam Khodadadian; Majid Taghizadeh; Marzieh Hamidzadeh
Source:
Fuel processing technology 2011 v.92 no.6 pp. 1164-1168
ISSN:
0378-3820
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; absorption; anions; barium; catalysts; catalytic activity; ceric oxide; methane; propionic acid; sol-gel processing
Abstract:
... The influences of barium precursor and promoter type on the catalytic performance of perovskite catalysts in OCM reaction were studied. Catalysts (BaTiPO₃, P: promoter) were prepared by carbonate, hydroxide and propionate precursors of barium and SnCl₂ and CeO₂ as promoters by sol–gel method, tested in a fixed-bed microreactor and characterized by XRD, BET, CO₂-TPD, FT-IR and UV–Visible analysis. ...
DOI:
10.1016/j.fuproc.2010.11.032

46. Enhancing percutaneous delivery of methotrexate using different types of surfactants

Author:
Yousef Javadzadeh; Hamed Hamishehkar
Source:
Colloids and surfaces 2011 v.82 no.2 pp. 422-426
ISSN:
0927-7765
Subject:
DNA; absorption; anions; cations; chemical concentration; drug formulations; gels; keratin; methotrexate; nonionic surfactants; psoriasis; rats; salicylic acid; solvents; toxicity
Abstract:
... Regarding the potential severe toxicity associated with systemic administration of methotrexate (MTX), a topical formulation might be of greater utility for the treatment of psoriasis and other hyperproliferative skin disorders. One of the presumed reasons for the lack of clinical activity of topical methotrexate in psoriasis is insufficient percutaneous penetration necessary to inhibit epidermal ...
DOI:
10.1016/j.colsurfb.2010.09.015
PubMed:
20951009

47. Facile synthesis of N-acetyl-l-cysteine capped ZnS quantum dots as an eco-friendly fluorescence sensor for Hg²⁺

Author:
Junling Duan; Xiaochen Jiang; Shouqing Ni; Min Yang; Jinhua Zhan
Source:
Talanta 2011 v.85 no.4 pp. 1738-1743
ISSN:
0039-9140
Subject:
absorption; acetylcysteine; anions; aqueous solutions; cations; detection limit; fluorescence; mercury; quantum dots
Abstract:
... This paper described an investigation of a novel eco-friendly fluorescence sensor for Hg²⁺ ions based on N-acetyl-l-cysteine (NAC)-capped ZnS quantum dots (QDs) in aqueous solution. By using safe and low-cost materials, ZnS QDs modified by NAC were easily synthesized in aqueous medium via a one-step method. The quantitative detection of Hg²⁺ ions was developed based on fluorescence quenching of Zn ...
DOI:
10.1016/j.talanta.2011.06.071

48. Fluorescent boron dipyrromethene (Bodipy) dyes having two and four vinyl residues

Author:
Thomas Bura; Delphine Hablot; Raymond Ziessel
Source:
Tetrahedron letters 2011 v.52 no.18 pp. 2370-2374
ISSN:
0040-4039
Subject:
absorption; anions; boron; cations; chemical reactions; chemical structure; fluorescence; fluorescent dyes; organic compounds; wavelengths
Abstract:
... Several new extended fluorescent dyes have been prepared by stepwise functionalisation of the methyl groups located in the 1, 3, 5, and 7 substitution positions of Bodipy dyes. In one case, a ferrocene residue has been connected, giving rise to severe fluorescence quenching and a rich redox behavior. The stepwise syntheses were largely based on Knoevenagel reactions allowing the attachment of thre ...
DOI:
10.1016/j.tetlet.2011.02.094

49. Fluoride adsorption studies on mixed-phase nano iron oxides prepared by surfactant mediation-precipitation technique

Author:
M. Mohapatra; K. Rout; P. Singh; S. Anand; S. Layek; H.C. Verma; B.K. Mishra
Source:
Journal of hazardous materials 2011 v.186 no.2-3 pp. 1751-1757
ISSN:
0304-3894
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; absorption; adsorbents; adsorption; anions; chlorides; ferrihydrite; goethite; hematite; pH; surfactants; temperature; transmission electron microscopy
Abstract:
... Mixed nano iron oxides powder containing goethite (α-FeOOH), hematite (α-Fe₂O₃) and ferrihydrite (Fe₅HO₈·4H₂O) was synthesized through surfactant mediation-precipitation route using cetyltrimethyl ammonium bromide (CTAB). The X-ray diffraction, FTIR, TEM, Mössbauer spectroscopy were employed to characterize the sample. These studies confirmed the nano powder contained 77% goethite, 9% hematite and ...
DOI:
10.1016/j.jhazmat.2010.12.076

50. Hydrochemistry and evaluation of groundwater suitability for irrigation and drinking purposes in the Markandeya River basin, Belgaum District, Karnataka State, India

Author:
P. Ravikumar; R. K. Somashekar; Mhasizonuo Angami
Source:
Environmental monitoring and assessment 2011 v.173 no.1-4 pp. 459-487
ISSN:
0167-6369
Subject:
absorption; alkalinity; anions; chlorides; drinking; electrical conductivity; exchangeable sodium; groundwater; hardness; hydrochemistry; irrigation water; latitude; longitude; magnesium; pH; permeability; salinity; sodium; sodium bicarbonate; sodium carbonate; sulfates; total dissolved solids; water quantity; watersheds; India
Abstract:
... Markandeya River basin stretches geographically from 15°56′ to 16°08′ N latitude and 74°37′ to 74°58′ E longitude, positioned in the midst of Belgaum district, in the northern part of Karnataka. Since the quantity and quality of water available for irrigation in India is variable from place to place, groundwater quality in the Markandeya River basin was evaluated for its suitability for drinking a ...
DOI:
10.1007/s10661-010-1399-2
PubMed:
20237840