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You searched for: Publication Year 2008 Remove constraint Publication Year: 2008 Subject acetone Remove constraint Subject: acetone
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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