نتایج جستجو برای: alcohols

تعداد نتایج: 11549  

2013
Nitin M Chauhan Ravikumar B Shinde S. Mohan Karuppayil

In this study we report the potential of alcohols as morphogenetic regulators in Candida albicans. All the alcohols tested influenced various modes of growth like planktonic as well as biofilm forms. Viability was affected at high concentrations. Among the alcohols, the response of C. albicans to amyl alcohol (pentanol) was noteworthy. Amyl alcohol at a concentration 0.5% which was not inhibito...

Journal: :Applied and environmental microbiology 1985
S E Craven L C Blankenship

The activation properties of Clostridium perfringens NCTC 8679 spores were demonstrated by increases in CFU after heating in water or aqueous alcohols. The temperature range for maximum activation, which was 70 to 80 degrees C in water, was lowered by the addition of alcohols. The response at a given temperature was dependent on the time of exposure and the alcohol concentration. The monohydric...

Journal: :Bioscience, biotechnology, and biochemistry 2015
Da-Ming Gao Takashi Kobayashi Shuji Adachi

The influence of water-miscible alcohols (methanol, 1-propanol, 2-propanol, and t-butyl alcohol) on the isomerization of glucose to fructose and mannose was investigated under subcritical aqueous conditions (180-200 °C). Primary and secondary alcohols promoted the conversion and isomerization of glucose to afford fructose and mannose with high and low selectivity, respectively. On the other han...

Journal: :Biochemical Society transactions 2000
N N Gandhi K D Mukherjee

Lipase from papaya (Carica papaya) latex (CPL), Candida antarctica lipase B (Novozym 435, NOV) and Rhizomucor miehei lipase (Lipozyme IM 20, LIP) were used as biocatalysts for the esterification of caprylic acid with straight-chain saturated C(4)-C(18) alcohols and unsaturated C(18) alcohols, such as cis-9-octadecenyl (oleyl, C(18:1), n-9), cis-6-octadecenyl (petroselinyl, C(18:1), n-12), cis-9...

Journal: :Chirality 2017
Irshad Ahmad Shagufta Abdul Rahman AlMallah

Enantiomerically pure secondary alcohols are essential compounds in organic synthesis and are used as chiral auxiliaries and synthetic intermediates in the pharmaceutical, agrochemical, and fine chemical industries. One of the attractive and practical approaches to achieving optically pure secondary alcohols is oxidative kinetic resolution of racemic secondary alcohols using chiral Mn(III) sale...

Journal: :iranian chemical communication 0
abbas amini manesh payame noor university, hamedan ardeshir khazaei faculty of chemistry, bu-ali sina university, p.o. box 651783868, hamedan, iran maedeh gohari department of chemistry, payame noor university, 19395-4697 tehran, i. r. of iran mahdieh chegeni department of chemistry, faculty of science, ayatollah ozma boroujerdi university, boroujerd, iran shahnaz saednia young researchers & elites club, toyserkan branch, islamic azad university, toyserkan, iran

methoxymethylation of a variety of alcohols was performed using formaldehyde dimethyl acetal in the presence of 1,3-dichloro-5,5-dimethyl hydantoin [dcdmh] and poly n,n′-dibromo-n-ethyl naphthyl-2,7-disulfonamide [pbns] as catalysts at room temperature and under solvent-free conditions. our experiments show that primary and secondary alcohols can be smoothly converted into the corresponding mom...

Journal: :journal of sciences islamic republic of iran 0

self-association of alcohols; including ethanol, methanol, cyclopentanol and octanol in separate mixtures with inert solvents have been studied using ft-ir spectroscopy. except for the band at 3640 cm–1 in the ir spectrum of the alcohols which is due to the monomer species, the presence of other bands in the region of stretching vibrational frequencies of oh (3100-3700 cm–1) are attributed to t...

Journal: :Journal of the American Chemical Society 2005
Christie Morrill Robert H Grubbs

Two reaction strategies are developed to promote the highly selective 1,3-isomerization of a variety of allylic alcohols using O3ReOSiPh3 as a catalyst. The first strategy utilizes substrates whose 1,3-regioisomer contains a conjugated alkene, which relies on thermodynamics to obtain high selectivity. The second strategy employs N,O-bis(trimethylsilyl)acetamide as an additive to selectively and...

2006
Ewa Świeżewska Agnieszka Dobrzyń Józef Langfort

Polyisoprenoid alcohols, linear polymers of isoprenoid residues are widespread in nature from bacteria to human cells. Their structures, distribution and biogenesis will be highlighted. Membrane localization of polyisoprenoid alcohols within the cell and techniques used for structural elucidation will be presented. Attention will be focused on the biosynthesis of polyisoprenoid alcohols in plan...

Journal: :iranian journal of chemistry and chemical engineering (ijcce) 2015
mukut gohani johannes h. van tonder barend c.b. benzuidenhoudt

although several methods for the preparation of 4o propargyl indole derivatives have been published, this synthetic transformation is complicated by the tendency of 3o propargyl alcohols to form allenium intermediates in acidic media.  it is therefore a challenge to find an efficient method for the c-3 propargylation of indoles with 3° propargylic alcohols.  in this paper we wish to report on t...

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