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1. Activity-directed fractionation of Pleurotus ostreatus in the search for analgesics

Author:
Vasudewa, N.S.; Abeytuga, D.T.U.; Ratnasooriya, W.D.
Source:
Pharmaceutical biology 2008 v.46 no.5 pp. 295-301
ISSN:
1388-0209
Subject:
analgesic effect; Pleurotus ostreatus; fractionation; plant extracts; acetone; hexane; methylene chloride; oral administration; males; rats; females; naloxone; mushrooms
DOI:
10.1080/13880200801887047

2. Acute Toxicity of Synthetic Pyrethroid Cypermethrin to Some Freshwater Organisms

Author:
Saha, Suchismita; Kaviraj, Anilava
Source:
Bulletin of environmental contamination and toxicology 2008 v.80 no.1 pp. 49-52
ISSN:
0007-4861
Subject:
Bufo; Crustacea; Cyprinus carpio; Ranatra; acetone; acute toxicity; aquatic insects; bioassays; carp; cypermethrin; freshwater; lethal concentration 50; tadpoles; toads
Abstract:
... Ninety-six hours static bioassays were made in the laboratory to determine acute toxicity of cypermethrin to five non-target freshwater organisms belonging to different taxa and niche. Susceptibility of the organisms to cypermethrin was in the order: the crustacean Diaptomus forbesi > the aquatic insect Ranatra filiformis > the freshwater carp Cyprinus carpio > the tadpole larva of the toad Bufo m ...
DOI:
10.1007/s00128-007-9314-4
PubMed:
18058051

3. Analysis of Organochlorine Pesticides in Coral (Porites evermanni) Samples Using Accelerated Solvent Extraction and Gas Chromatography/Ion Trap Mass Spectrometry

Author:
Wang, Dongli; Miao, Xiusheng; Li, Qing X.
Source:
Archives of environmental contamination and toxicology 2008 v.54 no.2 pp. 211-218
ISSN:
0090-4341
Subject:
DDD (pesticide); DDT (pesticide); HCH (pesticide); acetone; cleaning; corals; gas chromatography; heptachlor; hexachlorobenzene; indicator species; isomers; mass spectrometry; methylene chloride; monitoring; pollutants; sand; silica gel; solvents; Pacific Ocean
Abstract:
... A gas chromatography/ion trap mass spectrometry method was developed for analysis of organochlorine pesticides (OCPs) in coral samples, which were extracted with accelerated solvent extraction (ASE) and cleaned up on a sulfuric acid-modified silica gel column. The optimal ASE conditions were found to be 100°C and 2000 psi, with a mixture of acetone and methylene chloride (1:1, v/v). The target ana ...
DOI:
10.1007/s00244-007-9016-2
PubMed:
17721673

4. Analysis of aged sulfadiazine residues in soils using microwave extraction and liquid chromatography tandem mass spectrometry

Author:
Förster, M.; Laabs, V.; Lamshöft, M.; Pütz, T.; Amelung, W.
Source:
Analytical and bioanalytical chemistry 2008 v.391 no.3 pp. 1029-1038
ISSN:
1618-2642
Subject:
Cambisols; Luvisols; acetone; acetonitrile; agricultural soils; carbon; drug residues; ethyl acetate; liquid chromatography; metabolites; methanol; microwave treatment; pH; radionuclides; soil pollution; solvents; sulfadiazine; swine; tandem mass spectrometry; temperature
Abstract:
... An efficient extraction of sulfadiazine residues from soils is difficult, as sulfadiazine is known to form quickly sequestering residues. The objective of this study was to optimize an exhaustive extraction for aged residues of sulfadiazine and its two major metabolites, N-acetylsulfadiazine and 4-hydroxysulfadiazine, from soil. For this purpose two representative used agricultural soils (Luvisol, ...
DOI:
10.1007/s00216-008-2081-1
PubMed:
18414833

5. Antiangiogenic Effect of Curcumin in Pure Versus in Extract Forms

Author:
Liu, Dong; Schwimer, Joshua; Liu, Zhijun; Woltering, Eugene A.; Greenway, Frank L.
Source:
Pharmaceutical biology 2008 v.46 no.10-11 pp. 677-682
ISSN:
1388-0209
Subject:
medicinal properties; turmeric; curcumin; Curcuma longa; plant extracts; chemical constituents of plants; bioassays; water solubility; ethanol; acetone; tissue culture; placenta
DOI:
10.1080/13880200802215826

6. Antifeedant and larvicidal effects of plant extracts against Spodoptera litura (F.), Aedes aegypti L. and Culex quinquefasciatus Say

Author:
Kamaraj, C.; Rahuman, A. Abdul; Bagavan, A.
Source:
Parasitology research 2008 v.103 no.2 pp. 325-331
ISSN:
0932-0113
Subject:
Aedes aegypti; Culex quinquefasciatus; Ocimum americanum; Ocimum tenuiflorum; Spodoptera litura; acetates; acetone; antifeedants; botanical insecticides; chloroform; hexane; instars; larvae; leaf extracts; lethal concentration 50; medicinal plants; methanol; mortality; pests; screening; vector control; India
Abstract:
... A screening for larvicidal activity of plant extracts with some known medicinal attributes could lead to the discovery of new agents for pest and vector control. In the backdrop of recent revival of interest in developing plant-based insecticides, the present study was carried out to evaluate the larvicidal properties in three medicinal plants growing abundantly in the region of Chitheri Hills, Dh ...
DOI:
10.1007/s00436-008-0974-8

7. Antioxidant activity of extract of adzuki bean and its fractions

Author:
AMAROWICZ, RYSZARD; ESTRELLA, ISABEL; HERNÁNDEZ, TERESA; TROSZYŃSKA, AGNIESZKA
Source:
Journal of food lipids 2008 v.15 no.1 pp. 119-136
ISSN:
1065-7258
Subject:
epicatechin; myricetin; protocatechuic acid; 2,2-diphenyl-1-picrylhydrazyl; high performance liquid chromatography; lipids; glucosides; mass spectrometry; acetone; absorbance; databases; procyanidins; models; detectors; tannins; catechin; antioxidant activity; ethanol; antioxidants; vanillin; Vigna angularis; chemical analysis; healthy diet
Abstract:
... Phenolic compounds were extracted from adzuki bean using 80% (v/v) aqueous acetone. Crude extract was applied onto a Sephadex LH-20 column. Fraction I, consisting of low-molecular-weight phenolics, was eluted from the column using ethanol. Fraction II, consisting of tannins, was obtained using water/acetone (1:1; v/v) as the mobile phase. Phenolic compounds present in the crude extract and its fra ...
DOI:
10.1111/j.1745-4522.2007.00106.x

8. Antioxidative activities of grape (Vitis vinifera) seed extracts obtained from different varieties grown in Turkey

Author:
Yemis, Oktay; Bakkalbasi, Emre; Artik, Nevzat
Source:
International journal of food science & technology 2008 v.43 no.1 pp. 154-159
ISSN:
0950-5423
Subject:
Vitis vinifera; acetone; antioxidant activity; crop yield; free radical scavengers; gallic acid; grape seed extract; grape seeds; grapes; Turkey (country)
Abstract:
... In this study, total phenolic contents and antioxidant activities of grape seed extracts obtained from twelve different grape seeds from common varieties grown in Turkey were determined. Grape seeds were extracted with 70% acetone and extraction yield of grape seed were calculated. The total phenolic content of grape seed extracts were determined by the Folin-Ciocalteu procedure and ranged from 33 ...
DOI:
10.1111/j.1365-2621.2006.01415.x

9. Antithrombin activity and disaccharide composition of dermatan sulfate from different bovine tissues

Author:
Osborne, Simone A.; Daniel, Robyn A.; Desilva, Kirthi; Seymour, Robert B.
Source:
Glycobiology 2008 v.18 no.3 pp. 225-234
ISSN:
0959-6658
Subject:
acetone; anion exchange chromatography; aorta; aquatic invertebrates; bioactive properties; cattle; coagulation; dermatan sulfate; diaphragm; disaccharides; drugs; esophagus; eyes; fluorophore-assisted carbohydrate electrophoresis; heparin; intestinal mucosa; small intestine; swine; thrombin; tongue; uronic acids
Abstract:
... Dermatan sulfate is a glycosaminoglycan that selectively inhibits the action of thrombin through interaction with heparin cofactor II. Unlike heparin it does not interact with other coagulation factors and is able to inhibit thrombin associated with clots. This property has made dermatan sulfate an attractive candidate as an antithrombotic drug. Previous studies have showed that dermatan sulfate d ...
DOI:
10.1093/glycob/cwm136

10. Application of temperature-controlled micro planar chromatography for separation and quantification of testosterone and its derivatives

Author:
Paweł K. Zarzycki; Magdalena B. Zarzycka
Source:
Analytical and bioanalytical chemistry 2008 v.391 no.6 pp. 2219-2225
ISSN:
1618-2642
Subject:
acetone; acetonitrile; carbon; equipment; hexane; methanol; methylene chloride; methyltestosterone; propionic acid; quantitative analysis; screening; temperature; testosterone; thin layer chromatography
Abstract:
... Temperature-controlled micro thin-layer chromatography (TLC) was applied for separation and quantification studies of testosterone and its derivatives including methyltestosterone, testosterone propionate, isobutyrate, phenylpropionate, isocaproate, enanthate and caprate. Chromatographic studies were performed on silica-, octadecylsilica- and aluminum-coated plates working inside a small thermosta ...
DOI:
10.1007/s00216-008-1919-x
PubMed:
18338160

11. An Approximate Linear Solvation Energy Relationships Model Based on Snyder's Selectivity Parameters. Chromatographic Behavior of Some 1-Aralkyl-4-Arylpiperazines

Author:
Andrić, Filip Lj.; Trifković, Jelena Đ.; Tešić, Živoslav Lj.; Milojković-Opsenica, Dusanka M.
Source:
Chromatographia 2008 v.68 no.5-6 pp. 453-458
ISSN:
0009-5893
Subject:
acetone; chromatography; energy; mathematical models; methanol; solvents
Abstract:
... In order to elucidate the influence of the mobile phase composition on the retention of some 1-aralkyl-4-arylpiperazines, Snyder's selectivity and polarity concept for building a simple linear solvation energy relationships model of chromatographic behavior was used. Maximum variability of mobile phase selectivity was achieved by using ternary mixtures of solvents from three different corners of t ...
DOI:
10.1365/s10337-008-0711-6

12. Articulospora sp. Produces Art1, an Inhibitor of Bacterial Histidine Kinase

Author:
Hirosuke SUGAHARA; Tatsuhiko KONDO; Masahiro OKADA; Yasuya IKEDA; Kenichi KAIDA; Ryosuke FUDOU; Takeshi MIZUNO; Youji SAKAGAMI
Source:
Bioscience, biotechnology, and biochemistry 2008 v.72 no.10 pp. 2521-2525
ISSN:
1347-6947
Subject:
acetone; biotechnology; glutathione; histidine kinase; protein phosphorylation; virulence
Abstract:
... A two-component system (TCS) comprising a histidine kinase (HK) sensor and a response regulator (RR) plays important roles in regulating the virulence of many pathogenic bacteria. We used a new screening method to isolate novel inhibitor Art1 against bacterial sensory HK from an acetone extract of solid cultures of Articulospora sp., an aquatic hypomycete. Art1 inhibited the ATP-dependent autophos ...
DOI:
10.1271/bbb.80021

13. Atom transfer radical polymerization of hexyl acrylate and preparation of its "all-acrylate" block copolymers

Author:
Datta, Haimanti; Singha, Nikhil K.
Source:
Journal of polymer science 2008 v.46 no.11 pp. 3499-3511
ISSN:
0887-624X
Subject:
acetone; bromine; catalysts; composite polymers; copper; ligands; molecular weight; nuclear magnetic resonance spectroscopy; polymerization; solvents
Abstract:
... This investigation reports the polymerization of hexyl acrylate (HA) using atom transfer radical polymerization technique and subsequently the preparation of its di- and triblock copolymers with methyl methacrylate. Atom transfer radical polymerization of HA was investigated using different initiators and CuBr or CuCl as catalyst in combination with varying ligands, e.g., 2,2'-bipyridine and N,N,N ...
DOI:
10.1002/pola.22683

14. Bacteriocin detection by liquid chromatography/mass spectrometry for rapid identification

Author:
Zendo, T.; Nakayama, J.; Fujita, K.; Sonomoto, K.
Source:
Journal of applied microbiology 2008 v.104 no.2 pp. 499-507
ISSN:
1364-5072
Subject:
acetone; ions; liquid chromatography; mass spectrometry; molecular weight; nisin; rapid methods; screening
Abstract:
... To establish a new system to detect and identify bacteriocins in the early stage of screening for novel bacteriocins. Liquid chromatography/mass spectrometry (LC/MS) was employed for development of a new system for rapid detection and identification of bacteriocins. The system detected and identified bacteriocins such as nisin and lacticin 481 from 25 μl of culture supernatants of their producing ...
DOI:
10.1111/j.1365-2672.2007.03575.x
PubMed:
17927753

15. Biofiltration of ketone compounds by a composite bead biofilter

Author:
Chan, Wu-Chung; Peng, Kang-Hong
Source:
Bioresource technology 2008 v.99 no.8 pp. 3029-3035
ISSN:
0960-8524
Subject:
acetone; biofilters; biofiltration; chemical reactions; microbial growth
Abstract:
... In this study, the biochemical kinetic behaviors of ketone compounds in a composite bead biofilter were investigated. Both microbial growth rate k g and biochemical reaction rate k d would be inhibited at higher average inlet concentration. For the microbial growth process, the inhibitive effect was the least pronounced for acetone and the order of k g value was MEK>MIPK>acetone in the average inl ...
DOI:
10.1016/j.biortech.2007.06.014
PubMed:
17669648

16. Biosurfactant production by free and alginate entrapped cells of Pseudomonas fluorescens

Author:
Abouseoud, Mahmoud; Yataghene, Aziza; Amrane, Abdeltif; Maachi, Rachida
Source:
Journal of industrial microbiology & biotechnology 2008 v.35 no.11 pp. 1303-1308
ISSN:
1367-5435
Subject:
Pseudomonas fluorescens; acetone; ambient temperature; biosurfactants; byproducts; carbon; emulsifying; emulsifying properties; energy; foaming; immobilized cells; olive oil; pH; salinity; sodium chloride; surface tension
Abstract:
... Production of biosurfactant by free and alginate-entrapped cells of Pseudomonas fluorescens Migula 1895-DSMZ was investigated using olive oil as the sole carbon and energy source. Biosurfactant synthesis was followed by measuring surface tension and emulsifying index E24 over 5 days at ambient temperature and at neutral pH. Diffusional limitations in alginate beads affected the kinetics of biosurf ...
DOI:
10.1007/s10295-008-0411-0

17. Block copolymer preparation by atom transfer radical polymerization under emulsion conditions using a nanoprecipitation technique

Author:
Chan-Seng, Delphine; Rider, David A.; Guérin, Gérald; Georges, Michael K.
Source:
Journal of polymer science 2008 v.46 no.2 pp. 625-635
ISSN:
0887-624X
Subject:
X-radiation; acetone; acrylates; aqueous solutions; atomic force microscopy; composite polymers; emulsions; hydrolysis; latex; light scattering; polymerization; styrene; transmission electron microscopy
Abstract:
... Living-radical polymerization of acrylates were performed under emulsion atom transfer radical polymerization (ATRP) conditions using latexes prepared by a nanoprecipitation technique previously employed and optimized for the polymerization of styrene. A macroinitiator of poly(n-butyl acrylate) prepared under bulk ATRP was dissolved in acetone and precipitated in an aqueous solution of Brij 98 to ...
DOI:
10.1002/pola.22410

18. Broad substrate Cytochrome P450 monooxygenase activity in the cells of Aspergillus terreus MTCC 6324

Author:
Vatsyayan, Preety; Kumar, A. Kiran; Goswami, Papori; Goswami, Pranab
Source:
Bioresource technology 2008 v.99 no.1 pp. 68-75
ISSN:
0960-8524
Subject:
Aspergillus terreus; acetone; alkanes; catalytic activity; cytochrome P-450; cytosol; dimethyl sulfoxide; glucose; heme; methanol; molecular weight; naphthalene; oxidation; polyacrylamide gel electrophoresis; solvents; steroids; substrate specificity
Abstract:
... Cytochrome P450 (CYP) monooxygenase activities with different category of substrates namely, alkanes, alkane derivatives, alcohols, aromatic compounds, organic solvents, and steroids were detected in the cells of Aspergillus terreus. High CYP specific activity was observed when methanol (5.6±0.017Umg-¹), acetone (7.76±0.02Umg-¹), dimethylsulphoxide (DMSO) (9.70±0.005Umg-¹), n-hexadecane (4.39±0.02 ...
DOI:
10.1016/j.biortech.2006.11.055
PubMed:
17251009

19. Ceramides Extracted from Wool: Pilot Plant Solvent Extraction

Author:
Raquel Ramírez; Meritxell Martí; Albert Manich; Jose Luis Parra; Luisa Coderch
Source:
Textile research journal 2008 v.78 no.1 pp. 73-80
ISSN:
0040-5175
Subject:
wool; woolen fabric; physicochemical properties; mechanical properties; solvents; acetone; methanol; lanolin
Abstract:
... Ceramides extracted from wool fibers have proved to be beneficial in pharmaceutical and cosmetic formulations in the treatment and care of skin and human hair. This work sought to obtain internal wool lipid extract enriched in ceramides at pilot plant level without causing significant damage to the wool fiber. To this end, two extraction methodologies were performed using two solvents — acetone an ...
DOI:
10.1177/0040517507083369

20. Characteristics of thin cellulose ester films spin-coated from acetone and ethyl acetate solutions

Author:
Amim, J. Jr.; Kosaka, P. M.; Petri, D. F. S.
Source:
Cellulose 2008 v.15 no.4 pp. 527-535
ISSN:
0969-0239
Subject:
acetone; atomic force microscopy; butyrates; cellulose; cellulose acetate; contact angle; energy; evaporation rate; polymers; propionates; silicon; solvents; surface roughness; wettability
Abstract:
... Spin-coated films of cellulose acetate (CA), cellulose acetate propionate (CAP), cellulose acetate butyrate (CAB) and carboxymethylcellulose acetate butyrate (CMCAB) have been characterized by ellipsometry, atomic force microscopy (AFM) and contact angle measurements. The films were spin-coated onto silicon wafers, a polar surface. Mean thickness values were determined by means of ellipsometry and ...
DOI:
10.1007/s10570-008-9213-9

21. Characterization and acetylation behavior of bamboo pulp

Author:
Zhanping Yang; Songwei Xu; Xiaolong Ma; Shanyuan Wang
Source:
Wood science and technology 2008 v.42 no.8 pp. 621-632
ISSN:
0043-7719
Subject:
Fourier transform infrared spectroscopy; X-radiation; acetone; acetylation; cellulose; cellulose acetate; crystal structure; sulfuric acid; wood pulp
Abstract:
... In the present study, the chemical–physical properties of bamboo pulp prepared with a sequential totally chlorine-free procedure were analyzed and compared with that of commercial wood pulp by SEM, FTIR, TGA, and X-ray. α-Cellulose content was determined to be 95%, a little less than that of commercial wood pulp. But the crystallinity of bamboo pulp is lower than wood pulp. Acetylation activity of ...
DOI:
10.1007/s00226-008-0194-5

22. Characterization of Surfactin Produced by Bacillus subtilis Isolate BS5

Author:
Abdel-Mawgoud, Ahmad Mohammad; Aboulwafa, Mohammad Mabrouk; Hassouna, Nadia Abdel-Haleem
Source:
Applied biochemistry and biotechnology 2008 v.150 no.3 pp. 289-303
ISSN:
0273-2289
Subject:
Bacillus subtilis; surfactants; aqueous solutions; pH; ethanol; acetone; solvents; methanol; butanol; chloroform; methylene chloride; crystals; temperature; kerosene; diesel fuel; remediation; petroleum; provenance; soil bacteria; Egypt
Abstract:
... Physical and chromatographic characterization of the surfactin biosurfactant produced by Bacillus subtilis isolate BS5 has been conducted to study its potentiality for industrial application. The crude extract of test surfactin appeared as off-white to buff flake-like amorphous residue with bad odor similar to sour pomegranate. Test surfactin showed solubility in aqueous solution at pH > 5 with op ...
DOI:
10.1007/s12010-008-8153-z
PubMed:
18437297

23. Characterization, microstructure, and gas sensitive response behavior of PEG/lithium salt polymer electrolyte films

Author:
Yanling Luo; Shuhong Wang; Zhanqing Li
Source:
Journal of materials science 2008 v.43 no.1 pp. 174-184
ISSN:
0022-2461
Subject:
X-ray diffraction; acetone; acetonitrile; calorimeters; chloroform; composite polymers; electrolytes; films (materials); hydrogen bonding; lithium; microstructure; molecular weight; polyethylene glycol; salt concentration; scanning electron microscopes; vapors
Abstract:
... A composite polymer electrolyte film was prepared by dissolving polyethylene glycol (PEG) with different molecular weight in acetonitrile, and vapor-induced response behavior was investigated upon exposure to various chemical environments. The effect of lithium concentrations on ionic conductivity and response was discussed. The surface microporous structures and vapor sensitive conductivity of th ...
DOI:
10.1007/s10853-007-2125-5

24. Chemical constituents from Gmelina arborea bark and their antioxidant activity

Author:
Syamsul Falah; Takeshi Katayama; Toshisada Suzuki
Source:
Journal of wood science 2008 v.54 no.6 pp. 483-489
ISSN:
1435-0211
Subject:
2,2-diphenyl-1-picrylhydrazyl; Gmelina arborea; acetone; antioxidant activity; bark; chemical composition; chromatography; ethanol; ethyl acetate; ethyl ether; fractionation; free radical scavengers; glycosides; heartwood; hexane; leaves; lignans; medicine; methanol; roots
Abstract:
... Gmelina arborea Roxb. is a fast-growing species and is known to have been used in traditional Indian medicine. Chemical constituents from the bark have not been reported, although some chemical constituents from part of this plant (heartwood, leaf, and root) are known. In this study, the bark meal was successively extracted with acetone and methanol. Fractionation of the acetone extract with n-hex ...
DOI:
10.1007/s10086-008-0983-3

25. Chemical stability of haloperidol injection by high performance thin-layer chromatography

Author:
Mennickent, Sigrid; Pino, Loreto; Vega, Mario; de Diego, Marta
Source:
Journal of separation science 2008 v.31 no.1 pp. 201-206
ISSN:
1615-9306
Subject:
acetic acid; acetone; glass; haloperidol; quantitative analysis; refrigeration; silica gel; storage conditions; temperature; thin layer chromatography; wavelengths
Abstract:
... The chemical stability of haloperidol lactate injection was studied under different storage conditions by high performance thin-layer chromatography (HPTLC). The study was performed at 25 ± 2°C and at refrigeration temperature (8 ± 1°C) in original glass ampoules over 15 days after being opened. The samples tested at 25 ± 2°C were stored with exposure to and protection from light. Chromatographic ...
DOI:
10.1002/jssc.200700404
PubMed:
18080244

26. Chitosan as a wall material for a microencapsulated delivery system for Macrobrachium rosenbergii (de Man) larvae

Author:
Anas, Abdulaziz; Philip, Rosamma; Singh, Isaac Sarojeni Bright
Source:
Aquaculture research 2008 v.39 no.8 pp. 885-890
ISSN:
1355-557X
Subject:
Macrobrachium rosenbergii; acetone; aquaculture; chitosan; cross-linking reagents; diet; drugs; free amino acids; larvae; leaching; medicine; microencapsulation; nutrients; seawater; sodium hydroxide
Abstract:
... Chitosan has been widely accepted as a wall material for preparing microcapsules of various purposes in human medicine. The possibility of using chitosan as a wall material for microencapsulating nutrients and drugs for aquaculture purposes, specifically to Macrobrachium rosenbergii larvae was evaluated in this study. Two types of chitosan-coated microcapsules were prepared using either acetone (M ...
DOI:
10.1111/j.1365-2109.2008.01944.x

27. Combined effect of cypermethrin and copper on catalase activity in soil

Author:
Liu, Jun; Xie, Jimin; Chu, Yafei; Sun, Cheng; Chen, Chuanxiang; Wang, Qian
Source:
Journal of soils and sediments 2008 v.8 no.5 pp. 327-332
ISSN:
1439-0108
Subject:
acetone; analysis of variance; aqueous solutions; bioavailability; catalase; copper; copper sulfate; cypermethrin; edaphic factors; enzyme substrates; heavy metals; hydrogen peroxide; pollutants; potassium permanganate; pyrethrins; risk; risk assessment; soil enzymes; soil pollution; soil quality; soil sampling; soil water; vineyards; water holding capacity
Abstract:
... Background, aim, and scope Pollution of soil environment has become a serious problem in many countries. Repeated application of bordeaux mixture and pyrethroids insecticides have led to elevated copper (Cu) and pyrethroids concentrations in vineyard surface soils. Therefore, it is recommended to evaluate the combined effect of copper and pyrethroids on soil enzymes. Our aim was to get a more comp ...
DOI:
10.1007/s11368-008-0029-x

28. Comparison of composition and antioxidant capacity of some cereals and pseudocereals

Author:
Gorinstein, Shela; Lojek, Antonin; Číž, Milan; Pawelzik, Elke; Delgado-Licon, Efren; Medina, Oscar J.; Moreno, Marlén; Salas, Ines Arnao; Goshev, Ivan
Source:
International journal of food science & technology 2008 v.43 no.4 pp. 629-637
ISSN:
0950-5423
Subject:
acetone; antioxidant activity; buckwheat; correlation; cultivars; dietary fiber; ferulic acid; hypersensitivity; methanol; nitric oxide; polyphenols; rice; soybeans; tannins
Abstract:
... Polyphenols, phenolic acids, fibres and antioxidant capacity were determined in water, acetone and methanol extracts of buckwheat, rice, soybean, quinoa and 3 amaranth cultivars. Their antioxidant activities were comparatively assessed by total radical-trapping antioxidative potential (TRAP), ferric ion-reducing antioxidant power (FRAP), cupric-reducing antioxidant capacity (CUPRAC) and nitric oxi ...
DOI:
10.1111/j.1365-2621.2007.01498.x

29. Comparison of short-term preservation and assay methods for the molecular detection of Wolbachia in the Mediterranean flour moth Ephestia kuehniella

Author:
Zaspel, Jennifer M.; Hoy, Marjorie A.
Source:
Florida entomologist 2008 v.91 no.3 pp. 494-497
ISSN:
0015-4040
Subject:
acetone; Wolbachia; assays; DNA; polymerase chain reaction; tissue analysis; endosymbionts; Ephestia kuehniella; storage temperature; preservatives; detection; ethanol; bacteria
DOI:
10.1653/0015-4040(2008)91[494:COSPAA]2.0.CO;2

30. Creating microenvironments using encapsulated polymers

Author:
Kobašlija, Muris; Bogdan, Andrew R.; Poe, Sarah L.; Escobedo, Fernando; Mcquade, D. Tyler
Source:
Journal of polymer science 2008 v.46 no.7 pp. 2309-2315
ISSN:
0887-624X
Subject:
acetone; chemistry; encapsulation; methanol; polystyrenes; separation; solvents; tetrahydrofuran; toluene
Abstract:
... Miscible solvents are phase separated within microcapsules containing entrapped polymers, thereby creating stable, isolated microenvironments. In particular, we demonstrate that encapsulated polyethyleneimine induces phase separation of toluene and methanol and that this phase separation is well modeled by the Flory-Huggins theory. We further show the generality of microenvironment formation by ph ...
DOI:
10.1002/pola.22630

31. Crystalsolvates of N-(3-ethylthio-1,2,4-thiadiazol-5-yl-aminocarbonylmethyl)cytisine

Author:
U. S. Makhmudov; K. K. Turgunov; B. Tashkhodzhaev; V. A. Saprykina; Kh. M. Shakhidoyatov
Source:
Chemistry of natural compounds 2008 v.44 no.4 pp. 466-471
ISSN:
0009-3130
Subject:
X-ray diffraction; acetone; crystal structure; crystallization; crystals; methanol
Abstract:
... The crystal structures of N-(3-ethylthio-1,2,4-thiadiazol-5-yl-aminocarbonylmethyl)cytisine with waters of hydration, water and methanol, and acetone were studied by x-ray diffraction. Three conformers formed by rotation of the 3-ethylthio-1,2,4-thiadiazol-5-yl-aminocarbonylmethyl moiety relative to the cytisine core were detected in the studied crystal structures. Different conformations of N-(3- ...
DOI:
10.1007/s10600-008-9098-8

32. Daily physicochemical, microbiological and ecotoxicological fluctuations of a hospital effluent according to technical and care activities

Author:
Boillot, C.; Bazin, C.; Tissot-Guerraz, F.; Droguet, J.; Perraud, M.; Cetre, J.C.; Trepo, D.; Perrodin, Y.
Source:
Science of the total environment 2008 v.403 no.1-3 pp. 113-129
ISSN:
0048-9697
Subject:
acetaldehyde; acetone; bioassays; chlorine; drainage; ecotoxicology; effluents; formaldehyde; glutaraldehyde; hospitals; metals; phenols; toxic substances; toxicity
Abstract:
... The problem of hospital effluents falls into the framework of hazardous substances due to the specific substances used and discharged for the most part into urban drainage networks without prior treatment. This in-depth study has led to greater understanding of the effluents discharged by hospitals. The experimental program implemented consisted in carrying out parallel sampling of the effluents o ...
DOI:
10.1016/j.scitotenv.2008.04.037
PubMed:
18614202

33. Determination of Proteins in Refined and Nonrefined Oils

Author:
Martín-Hernández, C.; Benet, S.; Obert, L.
Source:
Journal of agricultural and food chemistry 2008 v.56 no.12 pp. 4348-4351
ISSN:
0021-8561
Subject:
acetone; fractionation; detection limit; quantitative analysis; molecular weight; refining; polyacrylamide gel electrophoresis; olive oil; rapeseed oil; solvents; amino acid composition; hexane; repeatability; protein content
Abstract:
... Five methods using aqueous/organic solvents for the separation of proteins from oils were compared. The extraction with acetone-hexane followed by amino acid analysis was found to be the most suitable method for isolation and quantification of proteins from oils. The detection limit of the method was 0.18 mg protein/kg oil, and the quantification limit was 0.6 mg protein/kg. The relative repeatabi ...
DOI:
10.1021/jf7036888
PubMed:
18512931

34. Determination of Some Phenolic Acids in Majorana hortensis by Capillary Electrophoresis with Online Electrokinetic Preconcentration

Author:
Petr, J.; Vitkova, K.; Ranc, V.; Znaleziona, J.; Maier, V.; Knob, R.; Sevcik, J.
Source:
Journal of agricultural and food chemistry 2008 v.56 no.11 pp. 3940-3944
ISSN:
0021-8561
Subject:
Origanum majorana; marjoram; phenolic acids; extraction; solvents; acetone; pressure treatment; pH; capillary electrophoresis
Abstract:
... An online accumulation/mobilization preconcentration technique based on a dynamic pH junction technique and electrokinetic injection was employed for analysis of phenolic acids (sinapic, ferulic, coumarinic, caffeic, syringic, vanillic, and 4-hydroxybenzoic acid) in extracts from Majorana hortensis leaves. Samples were extracted by pressurized solvent extraction with acetone at 150 °C and 15 MPa. ...
DOI:
10.1021/jf8000179
PubMed:
18473473

35. Determination of polyphenols in beer by an effective method based on solid-phase extraction and high performance liquid chromatography with diode-array detection

Author:
M. Dvořáková; P. Hulín; M. Karabín; P. Dostálek
Source:
Czech Journal of Food Sciences v.25 no.4 pp. 182-188
ISSN:
1805-9317
Subject:
acetone; acetonitrile; beers; detection limit; high performance liquid chromatography; methanol; polyphenols; quercetin; solid phase extraction; standard deviation
Abstract:
... The determination of polyphenols by spectrophotometric detection is complicated due to their low concentrations in beer. The beer samples have to be pre-concentrated before using the spectrophotometric detection for their quantification. An analytical method based on solid-phase extraction (SPE) and followed by high performance liquid chromatographic separation with diode-array detection is used f ...
DOI:
10.17221/690-cjfs

36. Development and optimization of fractional precipitation for the pre-purification of (+)-dihydromyricetin

Author:
Kang-Hee Lee; Jin-Hyun Kim
Source:
Biotechnology and bioprocess engineering 2008 v.13 no.3 pp. 274
ISSN:
1226-8372
Subject:
acetone; hydrochemistry; pH; solubility; storage temperature; storage time
Abstract:
... A novel fractional precipitation process, both simple and efficient, was developed for producing (+)-dihydromyricetin in high purity and high yield from crude extracts. The optimal acetone composition in water, initial (+)-dihydromyricetin concentration in crude extract, storage temperature, storage time, and pH were 1/5 (v/v), 0.1 g/mL, 4°C, 32 h, and 9.0, respectively. Crude extracts were effici ...
DOI:
10.1007/s12257-007-0199-1

37. Dispersive liquid-liquid microextraction combined with semi-automated in-syringe back extraction as a new approach for the sample preparation of ionizable organic compounds prior to liquid chromatography

Author:
Melwanki, Mahaveer B.; Fuh, Ming-Ren
Source:
Journal of chromatography 2008 v.1198-1199 pp. 1-6
ISSN:
0021-9673
Subject:
acetone; aqueous solutions; clenbuterol; correlation; detection limit; droplets; formic acid; lakes; liquid chromatography; liquid-phase microextraction; models; rivers; solvents; streams; tetrachloroethylene
Abstract:
... Dispersive liquid-liquid microextraction (DLLME) followed by a newly designed semi-automated in-syringe back extraction technique has been developed as an extraction methodology for the extraction of polar organic compounds prior to liquid chromatography (LC) measurement. The method is based on the formation of tiny droplets of the extractant in the sample solution using water-immiscible organic s ...
DOI:
10.1016/j.chroma.2008.05.007

38. Dispersive liquid-liquid microextraction method based on solidification of floating organic drop combined with gas chromatography with electron-capture or mass spectrometry detection

Author:
Leong, Mei-I.; Huang, Shang-Da
Source:
Journal of chromatography 2008 v.1211 no.1-2 pp. 8-12
ISSN:
0021-9673
Subject:
acetone; centrifugation; detection limit; droplets; gas chromatography; ice; liquid-phase microextraction; mass spectrometry; melting; solidification; solvents; temperature
Abstract:
... A simple dispersive liquid-liquid microextraction (DLLME) method based on solidification of a floating organic drop (DLLME-SFO) technique combined with gas chromatography/electron-capture detection (GC/ECD) or gas chromatography/mass spectrometry (GC/MS) has been developed. The proposed method is simple, low in cost, and of high precision. It overcomes the most important problem in DLLME, the high ...
DOI:
10.1016/j.chroma.2008.09.111

39. The Effect of Preparation Techniques on Sem-Imaging of Pit Membranes

Author:
Steven Jansen; Annelies Pletsers; Yuzou Sano
Source:
IAWA journal v.29 no.2 pp. 161-178
ISSN:
0928-1541
Subject:
Fraxinus americana; Laurus nobilis; Pinus wallichiana; acetone; air drying; branches; chemical treatment; coatings; electric potential difference; ethanol; evaporation; growth rings; hydrogen peroxide; platinum; tracheids
Abstract:
... This paper examines the effects of 30 preparation techniques on SEMimages of pit membranes in vessels and tracheids from the two latest growth rings in twigs of Pinus wallichiana, Fraxinus americana and Laurus nobilis. Most variation observed is due to coating and treatment with chemical solutions, such as acetone, ethanol and hydrogen peroxide. The effects of chemicals appear to be associated wit ...
DOI:
10.1163/22941932-90000177

40. Effect of different operating modes and biomass concentrations on the recovery of recombinant hepatitis B core antigen from thermal-treated unclarified Escherichia coli feedstock

Author:
Ng, Michelle Y.T.; Tan, Wen Siang; Abdullah, Norhafizah; Ling, Tau Chuan; Tey, Beng Ti
Source:
Journal of biotechnology 2008 v.138 no.3-4 pp. 74-79
ISSN:
0168-1656
Subject:
Escherichia coli; absorption; acetone; adsorbents; adsorption; biomass; biotechnology; chromatography; feedstocks; fluidized beds; hepatitis B antigens
Abstract:
... Expanded bed adsorption chromatography (EBAC) is a single pass operation that has been used as primary capture step in various protein purifications. The most common problem in EBAC is often associated with successful formation of a stable fluidized bed during the absorption stage, which is critically dependent on parameters such as liquid velocity, bed height, particle (adsorbent) size and densit ...
DOI:
10.1016/j.jbiotec.2008.08.004

41. Effect of low-molecular additives on precipitation of potato fruit juice proteins under different temperature regimes

Author:
BÁRTA, JAN; HEŘMANOVÁ, VERONIKA; DIVIŠ, JIŘÍ
Source:
Journal of food process engineering 2008 v.31 no.4 pp. 533-547
ISSN:
0145-8876
Subject:
acetone; acetic acid; potato protein; methanol; inorganic salts; starch; potatoes; solvents; citric acid; temperature; fruit juices; ethanol
Abstract:
... The effects of two mineral and two organic acids, four organic solvents (methanol, ethanol, 2-propano and acetone) and three inorganic metal salts in combination with temperature regimes 0 and 22C on the yield and resolubility of potato tuber proteins were studied. Using acids, the yield of precipitated protein ranged from 22.3% (citric acid, 0C) to 54.5% (acetic acid, 22C) of total protein; howev ...
DOI:
10.1111/j.1745-4530.2007.00167.x

42. Effect of organic mobile phase composition on signal responses for selected polyalkene additive compounds by liquid chromatography-mass spectrometry

Author:
Duderstadt, Randall E.; Fischer, Steven M.
Source:
Journal of chromatography 2008 v.1193 no.1-2 pp. 70-78
ISSN:
0021-9673
Subject:
acetone; acetonitrile; additives; atmospheric pressure; high performance liquid chromatography; ionization; mass spectrometry; methanol; solvents
Abstract:
... The high performance liquid chromatography (HPLC) separation methodology employed in the study of polyalkene additive compounds by atmospheric pressure ionization mass spectrometry (API-MS) was undertaken. Both atmospheric pressure chemical ionization (APCI) and atmospheric pressure photoionization (APPI) were examined. APPI (including dopant-assisted APPI) was found to be an inferior ionization t ...
DOI:
10.1016/j.chroma.2008.03.086

43. Effects of Extraction Methods on Phenolic Contents and Antioxidant Activity in Aerial Parts of Potentilla atrosanguinea Lodd. and Quantification of Its Phenolic Constituents by RP-HPLC

Author:
Kalia, Kalpana; Sharma, Kapil; Singh, Harsh Pratap; Singh, Bikram
Source:
Journal of agricultural and food chemistry 2008 v.56 no.21 pp. 10129-10134
ISSN:
0021-8561
Subject:
acetone; polyphenols; methanol; Potentilla atrosanguinea; shoots; flavonoids; ultrasonic treatment; solvents; maceration; reversed-phase high performance liquid chromatography; extraction; microwave treatment; antioxidant activity; ethanol; antioxidants
Abstract:
... The effects of different solvent systems (methanol, ethanol, acetone, and their 50% aqueous concentrations) and extraction procedures (microwave, ultrasound, Soxhlet and maceration) on the antioxidant activity of aerial parts of Potentilla atrosanguinea were investigated by three different bioassays: 2,2'-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) diammonium salt (ABTS), 2,2'-diphenyl-1-pic ...
DOI:
10.1021/jf802188b
PubMed:
18841977

44. Efficient screening for astaxanthin-overproducing mutants of the yeast Xanthophyllomyces dendrorhous by flow cytometry

Author:
Ukibe, Ken; Katsuragi, Tohoru; Tani, Yoshiki; Takagi, Hiroshi
Source:
FEMS microbiology letters 2008 v.286 no.2 pp. 241-248
ISSN:
0378-1097
Subject:
Xanthophyllomyces dendrorhous; acetone; antioxidant activity; aquaculture; astaxanthin; ethyl methanesulfonate; flow cytometry; fluorescence; food industry; mutants; screening; wavelengths; yeasts
Abstract:
... Astaxanthin possesses higher antioxidant activity than other carotenoids and, for this and other reasons, has great commercial potential for use in the aquaculture, pharmaceutical, and food industries. The basidiomycetous yeast Xanthophyllomyces dendrorhous is one of the best natural producers of astaxanthin, but wild-type cells accumulate only a small amount of astaxanthin. In this study, we deve ...
DOI:
10.1111/j.1574-6968.2008.01278.x
PubMed:
18657110

45. Evaluating the greenness of alternative reaction media

Author:
Denise Reinhardt; Florian Ilgen; Dana Kralisch; Burkhard König; Günter Kreisel
Source:
Green chemistry 2008 v.10 no.11 pp. 1170-1181
ISSN:
1463-9270
Subject:
acetone; citric acid; cycloaddition reactions; cyclohexanes; green chemistry; life cycle assessment; methanol; recycling; research and development; screening; solvents; urea
Abstract:
... The solvent performances and ecological (dis)advantages of different solvent systems for the Diels–Alder reaction of cyclopentadiene and methyl acrylate were investigated. Promising solvent alternatives, especially [C₆MIM][BF₄](1-hexyl-3-methylimidazolium tetrafluoroborate), citric acid/N,N′-dimethyl urea as well as a solvent-free alternative were compared to the conventional solvent systems metha ...
DOI:
10.1039/b807379a

46. Expression and purification of a nanostructure-forming peptide

Author:
Hartmann, B.M.; Kaar, W.; Falconer, R.J.; Zeng, B.; Middelberg, A.P.J.
Source:
Journal of biotechnology 2008 v.135 no.1 pp. 85-91
ISSN:
0168-1656
Subject:
acetone; affinity chromatography; biotechnology; hydrocolloids; peptides; reversed-phase high performance liquid chromatography; surfactants
Abstract:
... Peptides have recently attracted interest as building blocks for the assembly of novel functional materials including switchable surfactants, nanocoatings, hydrogels and aqueous vesicles. We expressed a beta-sheet forming peptide that has been widely studied in self-assembly processing, P₁₁-2, as a monomer, dimer, tetramer and nonamer fused to an insoluble expression partner, ketosteroid isomerase ...
DOI:
10.1016/j.jbiotec.2008.03.003

47. Extracellular glycosyl hydrolase activity of the Clostridium strains producing acetone, butanol, and ethanol

Author:
Berezina, O. V.; Sineoky, S. P.; Velikodvorskaya, G. A.; Schwarz, W.; Zverlov, V. V.
Source:
Applied biochemistry and microbiology 2008 v.44 no.1 pp. 42-47
ISSN:
0003-6838
Subject:
Clostridium acetobutylicum; acetic acid; acetone; beta-glucans; biomass; butanol; butyric acid; ethanol; starch; wheat flour
Abstract:
... Production of acetone, butanol, ethanol, acetic acid, and butyric acid by three strains of anaerobic bacteria, which we identified as Clostridium acetobutylicum, was studied. The yield of acetone and alcohols in 6% wheat flour medium amounted to 12.7-15 g/l with butanol constituting 51.0-55.6%. Activities of these strains towards xylan, β-glucan, carboxymethylcellulose, and crystalline and amorpho ...
DOI:
10.1134/S0003683808010079

48. Extraction of natural antioxidants from hazelnut (Corylus avellana L.) shell and skin wastes by long maceration at room temperature

Author:
Contini, Marina; Baccelloni, Simone; Massantini, Riccardo; Anelli, Gabriele
Source:
Food chemistry 2008 v.110 no.3 pp. 659-669
ISSN:
0308-8146
Subject:
acetone; methanol; hazelnuts; lipid peroxidation; plant extracts; roasting; maceration; industrial wastes; antioxidants; extraction; solvents; yields; antioxidant activity; ethanol; hulls; chopping; phenolic compounds
Abstract:
... The feasibility of obtaining antioxidant phenolic extracts from hazelnut by-products was investigated by long maceration at room temperature. The hard shells and defatted skins of both whole and chopped roasted hazelnut kernels were studied. Three solvent systems were employed and these included aqueous methanol, ethanol and acetone. Extraction yields as well as phenolic contents varied according ...
DOI:
10.1016/j.foodchem.2008.02.060

49. Fatty-acid composition and secondary metabolites from slightly polar extracts of the aerial part of Primula macrocalyx

Author:
Yu. S. Kosenkova; M. P. Polovinka; N. I. Komarova; D. V. Korchagina; S. V. Morozov; A. I. Vyalkov; N. Yu. Kurochkina; V. A. Cheremushkina; N. F. Salakhutdinov
Source:
Chemistry of natural compounds 2008 v.44 no.5 pp. 564-568
ISSN:
0009-3130
Subject:
Primula veris subsp. macrocalyx; acetone; aerial parts; flavones; free fatty acids; salicylates; secondary metabolites
Abstract:
... Flavones 2′,5′-dimethoxyflavone, 3′-methoxy-4′,5′-methylenedioxyflavone, 3′,4′-dimethoxyflavone, 5,6,2′,3′,6′-pentamethoxyflavone, and 5,6,2′,3′,5′,6′-hexamethoxyflavone; salicylates, methyl-4-methoxysalicylate and peonol; and bisbibenzyl polyphenol riccardin C were isolated for the first time from the acetone extract of the aerial part of Primula macrocalyx Bge. The content of free and total fatt ...
DOI:
10.1007/s10600-008-9145-5

50. Fed batch bioconversion of 2-propanol by a solvent tolerant strain of Alcaligenes faecalis entrapped in Ca-alginate gel

Author:
Mohammad, Balsam T.; Bustard, Mark T.
Source:
Journal of industrial microbiology & biotechnology 2008 v.35 no.7 pp. 677-684
ISSN:
1367-5435
Subject:
Alcaligenes faecalis; acetone; biodegradation; biotransformation; culture media; gels; immobilized cells; isopropyl alcohol; microbial growth; ribosomal DNA
Abstract:
... A gram-negative, rod-shaped, aerobe, capable of converting 2-propanol (isopropanol, IPA) to acetone was isolated from an oil/sump, and identified by 16 S rDNA analysis as Alcaligenes faecalis. Investigations showed this strain to be extremely solvent-tolerant and it was subsequently named ST1. In this study, A. faecalis ST1 cells were immobilized by entrapment in Ca-alginate beads (3 mm in diamete ...
DOI:
10.1007/s10295-008-0325-x
PubMed:
18293022