نتایج جستجو برای: phenol yield

تعداد نتایج: 209365  

2012
Mohammad Hakimi Mina Sarani

In this research, the 2-((2-(2-hydroxyethylamino) ethylimino) methyl) phenol (H2L) has been prepared with high yield via condensation of salicylaldehyde and 2-hydroxyethelamine. Crystal structure of H2L is determined at 130K. In the crystal structure of H2L, it is observed that there are two independent H2Lunits. X-ray crystal structural analysis revealed that the H2L belonged to the orthorhomb...

2009
Badamkhand Sukhbaatar Philip H. Steele Moon G. Kim

Bio-oil produced from fast pyrolysis of biomass has been investigated as a renewable fuel and as a source of industrial chemicals. The lignin fraction of bio-oil produced from wood in our fast pyrolysis reactor was separated by using only water and methanol with a 25% yield based on bio-oil weight. This separation procedure appears to be of lower cost than the reported extraction procedure usin...

Journal: :Chemosphere 2010
Alexandre Albinet Claudio Minero Davide Vione

This paper shows that the polychromatic quantum yield for the photolysis of 2,4-dinitrophenol (24DNP) in the wavelength interval of 300-500 nm is (8.1+/-0.4) x 10(-5) for the undissociated phenol, and (3.4+/-0.2) x 10(-5) for the phenolate. The second-order rate constants for reaction with ()OH were determined here as (1.76+/-0.05) x 10(9) M(-1) s(-1) and (2.33+/-0.11) x 10(9) M(-1) s(-1) for t...

2014
Burcu Sengüven Emre Baris Tulin Oygur Mehmet Berktas

AIM Discussing a protocol involving xylene-ethanol deparaffinization on slides followed by a kit-based extraction that allows for the extraction of high quality DNA from FFPE tissues. METHODS DNA was extracted from the FFPE tissues of 16 randomly selected blocks. Methods involving deparaffinization on slides or tubes, enzyme digestion overnight or for 72 hours and isolation using phenol chlor...

Journal: :The Journal of organic chemistry 2010
Joseph J Reczek Elisa Rebolini Adam R Urbach

This paper presents a robust method for the conjugation of viologens to peptides using an amide coupling strategy that is compatible with standard Fmoc solid-phase peptide synthesis. Methodology is presented for monitoring the milligram scale process quantitatively by UV spectroscopy. This chemistry enables the synthesis of a broad range of asymmetric viologens in high yield at room temperature...

Journal: :Journal of Zhejiang University. Science 2004
Yue-Zhong Wen Zhao-Hua Fang Wei-Ping Liu

Environmental concerns have highlighted the need of cleaner technologies. A cleaner, convenient and selective technology has been developed for the preparation of 3-(4,6-dimethoxy-pyrimidin-2-yloxy)-2-methyl-phenol (DPMP) from 2-methyl-benzene-1,3-diol in water as solvent. The isolated yield of DPMP is up to 86% in good selectivity. The product structure was characterized by conventional method...

2017
Daniel Shedlovskiy Natalia Shcherbik Dimitri G. Pestov

Current methods for isolating RNA from budding yeast require lengthy and laborious steps such as freezing and heating with phenol, homogenization with glass beads, or enzymatic digestion of the cell wall. Here, extraction with a solution of formamide and EDTA was adapted to isolate RNA from whole yeast cells through a rapid and easily scalable procedure that does not require mechanical cell lys...

Journal: :Talanta 1989
D R Jones

The chloramine-T-Phenol Red procedure affords a potentially very sensitive photometric method for the determination of bromide. However, serious problems (poor precision and high reagent blanks) have been encountered in trials which followed exactly the published procedure. The reason for these difficulties was found to be the high ratio of chloramine-T to Phenol Red which was used. In all prev...

Journal: :iranian chemical communication 0
aliakbar dehno khalaji department of chemistry, faculty of science, golestan university, gorgan, iran hossein mighani department of chemistry, faculty of science, golestan university, p.o. box 155 gorgan, iran milad kazemnejadi department of chemistry, faculty of science, golestan university, p.o. box 155 gorgan, iran

schiff base sal-2,5-clan = 2-(2,5-dichlorobenzylideneamino)phenol used as a new precursor for preparation of poly-2-(2,5-dichlorobenzylideneamino)phenol (pdcbap). in an aqueous alkaline medium, naocl oxidant is capable of oxidative poly-condensation reaction (op). both sal-2,5-clan and pdcbap were characterized by solubility tests, ft-ir, 1h-nmr spectroscopy and tg-dta studies. ft-ir and 1h-nmr...

2008
Tao Zeng Ju-Feng Sun

The title compound, C(16)H(26)O(2), was easily obtained in high yield when 4-bromo-methyl-2,6-di-tert-butyl-phenol was reacted with methanol. There are two independent mol-ecules in the asymmetric unit. The meth-oxy group in each of the independent mol-ecules was found to be disordered, with site-occupation factors of 0.8728 (18)/0.1272 (18) and 0.8781 (17)/0.1219 (17).

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