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1. Ambient pressure dried TEOS-based silica aerogels: good absorbents of organic liquids

Author:
Jyoti L. Gurav; A. Venkateswara Rao; D. Y. Nadargi; Hyung-Ho Park
Source:
Journal of materials science 2010 v.45 no.2 pp. 503-510
ISSN:
0022-2461
Subject:
1-propanol; absorbents; absorption; aerogels; ambient pressure; benzene; desorption; diesel fuel; drying; ethanol; gasoline; heptane; hexane; hydrophobicity; kerosene; liquids; methanol; oil spills; oils; shrinkage; silica; temperature; toluene; xylene
Abstract:
... The experimental work has been carried out to study the absorption–desorption properties of the hydrophobic silica aerogel for the application of oil spill cleanup. Aerogels were synthesized by sol–gel route prior to ambient pressure drying, by keeping TEOS:MeOH:Acidic H₂O:NH₄F:NH₄OH:HMDZ molar ratio constant at 1:16.5:0.81:0.62:0.63:0.41, respectively. The absorption of organic liquids by as-prep ...
DOI:
10.1007/s10853-009-3968-8

2. Characterization of warfarin unusual peak profiles on oligoproline chiral high performance liquid chromatography columns

Author:
Lao, Wenjian; Gan, Jay
Source:
Journal of chromatography 2010 v.1217 no.42 pp. 6545-6554
ISSN:
0021-9673
Subject:
1-propanol; additives; enantiomers; ethanol; ethers; ethyl acetate; hexane; high performance liquid chromatography; hydrogen; temperature; warfarin
Abstract:
... Unusual peak profiles of warfarin were characterized on two oligoproline chiral stationary phases (CSPs). The pattern of 1st peak (S(−)) broadening and the 2nd peak (R(+)) compression was observed under mobile phase of hexane (0.1% TFA)/2-propanol (IPA) on a triproline CSP 1, and with other alcohol modifier such as ethanol, 1-propanol, 1-butanol, 2-butanol, and tert-butanol as well. Through analyz ...
DOI:
10.1016/j.chroma.2010.08.066

3. Comparing the effects of various fuel alcohols on the natural attenuation of Benzene Plumes using a general substrate interaction model

Author:
Gomez, Diego E.; Alvarez, Pedro J.J.
Source:
Journal of contaminant hydrology 2010 v.113 no.1-4 pp. 66-76
ISSN:
0169-7722
Subject:
1-propanol; simulation models; methanol; groundwater contamination; bioremediation; groundwater flow; fuels; aquifers; biodegradation; butanol; sand; benzene; ethanol; hydrologic models
Abstract:
... The effects of five fuel alcohols (methanol, ethanol, 1-propanol, iso-butanol and n-butanol) on the natural attenuation of benzene were compared using a previously developed numerical model (General Substrate Interaction Module — GSIM) and a probabilistic sensitivity analysis. Simulations with a 30gal dissolving LNAPL (light non-aqueous phase liquid) source consisting of a range of gasoline blends ...
DOI:
10.1016/j.jconhyd.2010.02.002
PubMed:
20189262

4. Effect of Solvent Composition on Porosity, Surface Morphology and Thermal Behavior of Metal Alginate Prepared from Algae (Undaria pinnatifida)

Author:
Pathak, Tara Sankar; Yun, Jung-Ho; Lee, Se-Jong; Baek, Dae-Jin; Paeng, Ki-Jung
Source:
Journal of polymers and the environment 2010 v.18 no.1 pp. 45-56
ISSN:
1566-2543
Subject:
1-propanol; Fourier transform infrared spectroscopy; Undaria pinnatifida; calcium alginate; ethanol; heat; methanol; polymers; porosity; solvents; thermal analysis; thermal stability; weight loss
Abstract:
... Alginates, extracted from algae are linear unbranched polymers containing β-(1→4)-linked d-mannuronic acid (M) and α-(1→4)-linked l-guluronic acid (G) residues. The conversion of alginic acid into the metal alginate is confirmed using FTIR spectroscopy. Asymmetric and symmetric stretching of free carboxyl group present in metal alginate occurs almost at the same position in various solvent composi ...
DOI:
10.1007/s10924-009-0156-5

5. Effect of short-chain alcohols on surfactant-mediated reversed-phase liquid chromatographic systems

Author:
Ruiz-Ángel, M.J.; Carda-Broch, S.; García-Álvarez-Coque, M.C.
Source:
Journal of chromatography 2010 v.1217 no.45 pp. 7082-7089
ISSN:
0021-9673
Subject:
1-propanol; acetonitrile; beta-adrenergic antagonists; chromatography; ethanol; hydrophobic bonding; methanol; micelles; sodium dodecyl sulfate; solutes; solvents; surfactants
Abstract:
... The behaviour of β-blockers in a reversed-phase liquid chromatographic (RPLC) column with mobile phases containing a short-chain alcohol (methanol, ethanol or 1-propanol), with and without the surfactant sodium dodecyl sulphate (SDS), was explored. Two surfactant-mediated RPLC modes were studied, where the mobile phases contained either micelles or only surfactant monomers at high concentration. A ...
DOI:
10.1016/j.chroma.2010.09.011

6. Esterification Activity of Novel Fungal and Yeast Lipases

Author:
Rigo, Elisandra; Polloni, André E.; Remonatto, Daniela; Arbter, Francieli; Menoncin, Silvana; Oliveira, J. Vladimir; de Oliveira, Débora; Treichel, Helen; Kalil, Susana J.; Ninow, Jorge L.; Di Luccio, Marco
Source:
Applied biochemistry and biotechnology 2010 v.162 no.7 pp. 1881-1888
ISSN:
0273-2289
Subject:
1-propanol; butanol; esterification; esters; ethanol; industrial applications; methanol; oleic acid; screening; triacylglycerol lipase; yeasts
Abstract:
... The main objective of this work was the isolation and screening of microorganisms with potential for producing lipases for the synthesis of fatty esters as well as evaluating the specificity of the enzymes produced, using different alcohols (methanol, ethanol, n-propanol, and butanol) and fatty acids (oleic and lauric acids) as substrates. Promising biocatalysts for organic synthesis were obtained ...
DOI:
10.1007/s12010-010-8966-4
PubMed:
20544304

7. Mobile phase selection for the combined use of liquid chromatography-inductively coupled plasma mass spectrometry and electrospray ionisation mass spectrometry

Author:
Nygren, Yvonne; Björn, Erik
Source:
Journal of chromatography 2010 v.1217 no.30 pp. 4980-4986
ISSN:
0021-9673
Subject:
1-propanol; acetonitrile; bacitracin; carbon; cytochrome c; detection limit; dimethylformamide; electrospray ionization mass spectrometry; ethanol; ionization; liquid chromatography; platinum; separation; solvents; vapors
Abstract:
... Four different organic solvents: dimethylformamide, 1,4-dioxane, n-propanol and ethanol were evaluated as alternative organic modifiers to acetonitrile for liquid chromatography (LC) separations. The aim was to establish common sets of chromatographic conditions that could be applied for LC hyphenation to inductively coupled plasma mass spectrometry (ICPMS) as well as to electrospray ionization MS ...
DOI:
10.1016/j.chroma.2010.05.062

8. The PQQ biosynthetic operons and their transcriptional regulation in Pseudomonas aeruginosa

Author:
Gliese, Nicole; Khodaverdi, Viola; Görisch, Helmut
Source:
Archives of microbiology 2010 v.192 no.1 pp. 1-14
ISSN:
0302-8933
Subject:
1-propanol; Pseudomonas aeruginosa; acetates; aerobiosis; biosynthesis; ethanol; glycerol; mutants; nitrates; operon; succinic acid; transcription (genetics)
Abstract:
... Gene PA1990 of Pseudomonas aeruginosa, located downstream of pqqE and encoding a putative peptidase, was shown to be involved in excretion of PQQ into the culture supernatant. This gene is cotranscribed with the pqqABCDE cluster and was named pqqH. A PA1990::Kmr mutant (VK3) did not show any effect in growth behaviour; however, in contrast to the wild-type, no excretion of PQQ into the culture sup ...
DOI:
10.1007/s00203-009-0523-6

9. Peak half-width plots to study the effect of organic solvents on the peak performance of basic drugs in micellar liquid chromatography

Author:
Ruiz-Ángel, M.J.; Carda-Broch, S.; García-Álvarez-Coque, M.C.
Source:
Journal of chromatography 2010 v.1217 no.11 pp. 1786-1798
ISSN:
0021-9673
Subject:
1-propanol; acetonitrile; anionic surfactants; beta-adrenergic antagonists; ethanol; liquid chromatography; mass transfer; methanol; sodium dodecyl sulfate; solvents
Abstract:
... The addition of the anionic surfactant sodium dodecyl sulphate (SDS) to hydro-organic mixtures of methanol, ethanol, propanol or acetonitrile with water yielded enhanced peak shape (i.e. increased efficiencies and symmetrical peaks) for a group of basic drugs (β-blockers) chromatographed with a Kromasil C18 column. The effect can be explained by the thin layer of surfactant associated to the hydro ...
DOI:
10.1016/j.chroma.2010.01.041

10. Performance of short-chain alcohols versus acetonitrile in the surfactant-mediated reversed-phase liquid chromatographic separation of β-blockers

Author:
Ruiz-Ángel, M.J.; Torres-Lapasió, J.R.; Carda-Broch, S.; García-Álvarez-Coque, M.C.
Source:
Journal of chromatography 2010 v.1217 no.45 pp. 7090-7099
ISSN:
0021-9673
Subject:
1-propanol; acetonitrile; anionic surfactants; beta-adrenergic antagonists; ethanol; liquid chromatography; methanol; micelles; sodium dodecyl sulfate; solvents
Abstract:
... Organic solvents are traditionally added to micellar mobile phases to achieve adequate retention times and peak profiles, in a chromatographic mode which has been called micellar liquid chromatography (MLC). The organic solvent content is limited to preserve the formation of micelles. However, at increasing organic solvent contents, the transition to a situation where micelles do not exist is grad ...
DOI:
10.1016/j.chroma.2010.09.010

11. Volatile compounds in cheeses made with Micrococcus sp. INIA 528 milk culture or high enzymatic activity curd

Author:
MORALES, PILAR; CALZADA, JAVIER; JUEZ, CRISTINA; NUÑEZ, MANUEL
Source:
International journal of dairy technology 2010 v.63 no.4 pp. 538-543
ISSN:
1364-727X
Subject:
1-propanol; Micrococcus; acetaldehyde; acetoin; butanol; diacetyl; enzyme activity; esters; ethanol; free fatty acids; milk; semisoft cheeses; volatile compounds
Abstract:
... Volatile compounds were investigated in a semihard cheese made with lactic culture, lactic culture + Micrococcus sp. INIA 528 culture, and two levels of high enzymatic activity (HEA) curd made with this strain. The levels of acetaldehyde, 2-methyl propanal, 3-methyl butanal, ethanol, 2-methyl propanol and 3-methyl butanol were higher, and those of diacetyl and acetoin lower, in cheese made from mi ...
DOI:
10.1111/j.1471-0307.2010.00628.x