نتایج جستجو برای: para toluene sulphonic acid
تعداد نتایج: 1026329 فیلتر نتایج به سال:
cross-linked polymeric organogels have attracted much attention in recent years. most synthesized organogels are based on low molecular weight or denderitic materials. the study focuses on the preparation of an alcohol absorbent organogel based on 2-acrylamido-2-methylpropane sulphonic acid (amps) through cross-linking polymerization. polyethylene glycol diacrylate-400 and ammonium persulphate ...
لاکازها (1.10.3.2 ;ec پارا دی فنول دی اکسیژن اکسیدوردوکتاز) بدلیل قابلیت اکسیداسیون طیف گسترده ای از ترکیبات فنولی کاربردهای زیادی در صنایع بیوتکنولوژی دارد. در این تحقیق ژن لاکاز از bacillus sp. hr03 بوسیله پرایمرهای کلونینگ تکثیر و سپس محصولات pcr در ناقل بیانی (pet21a) کلون و به باکتری e.coli سویه bl21 انتقال یافت و آنالیز توالی انجام گرفت. ژن لاکاز حاوی 1542 نوکلئوتید بوده و 514 اسید آمینه ...
Inhalant abuse is a serious problem worldwide, particularly in disadvantaged populations and among adolescents. However, very few studies are available on objective measurements of inhalant abuse among adolescents. A pilot study was conducted on twenty-three adolescent inhalant users with recent use within one month on self-report, with the aim of biochemical validation of inhalant use by objec...
The essential oils of the flowering aerial parts of two Ocimum species viz., Ocimum gratissimum and O. sanctum were analyzed by gas chromatography and gas chromatography/mass spectroscopy. The principal constituent of O. gratissimum and O. sanctum was eugenol (75.1%) and methyl eugenol (92.4%), comprising 99.3 and 98.9% of the total oils, respectively. In vitro antimicrobial activity of the ess...
As a typical spinel ferrite, NiFe2O4 is suitable for use in gas sensors. Herein, we report the fabrication of porous, tremella-like assembled using ultrathin nanosheets via coordination Ni2+ and Fe2+ with 1,4-phenylenediboronic acid. The optical band gap estimated to be about 1.7 eV. Furthermore, sensor annealed at 400 °C exhibits low detection limit 50 ppb, fast response/recovery time (11.6 s/...
Schiff base, azetidinone and 4-thiazolidinone derivatives of para aminosalicylic acid were synthesised. It was planned to employ the structure based computer aided drug designing (CADD) to Schiff base, azetidinone and 4thiazolidinoneof para aminosalicylic acid. Approach was employed to understand the probable binding of para aminosalicylic acid on the active site of AMpC enzyme of HKY28 which w...
Outer membrane changes in a toluene-sensitive mutant of toluene-tolerant Pseudomonas putida IH-2000.
We isolated a toluene-sensitive mutant, named mutant No. 32, which showed unchanged antibiotic resistance levels, from toluene-tolerant Pseudomonas putida IH-2000 by transposon mutagenesis with Tn5. The gene disrupted by insertion of Tn5 was identified as cyoC, which is one of the subunits of cytochrome o. The membrane protein, phospholipid, and lipopolysaccharide (LPS) of IH-2000 and that of m...
Normal 0 false false false EN-US X-NONE AR-SA In 9 patients of 11-20 years old, Pulp response to phosphoric acid 37% during a 15 seconds etching period was studied. Class V cavities in cervical third of premolars were prepared as symmetrical couples. All the process was identical in both groups of case and control. In test group, 15 seconds etching...
Three derivatives of ethyl oxanilate were synthesized in order to test their application as gametocides on the hermaphrodite plants like common wheat (Triticum aestivum L.). A substituent at para position (F, Br, CN) of aniline defined its reactivity towards diethyl oxalate 2. Classical reaction in toluene was not selective and amidation occurred also at the second carbonyl groups of 2. Alterna...
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