نتایج جستجو برای: boronic acid

تعداد نتایج: 747997  

Journal: :Chemical communications 2011
Ryuhei Nishiyabu Yuji Kubo Tony D James John S Fossey

In this feature article the use of boronic acids to monitor, identify and isolate analytes within physiological, environmental and industrial scenarios is discussed. Boronic acids recognise diol motifs through boronic ester formation and interact with anions generating boronates, as such they have been exploited in sensing and separation protocols for diol appended molecules such as saccharides...

2015
Xiaochuan Yang Binghe Wang

With the rapidly increasing interest in the field of glycomics, which is the comprehensive study of the roles carbohydrates play in a living system, urgent need for developing quick and highly selective carbohydrate sensors is growing. The boronic acid group, with its electron-deficient structure (6 valence electrons with an open shell), acts as a Lewis acid with high intrinsic affinity towards...

Journal: :Blood 2009
Nilanjan Ghosh Ashkan Emadi

Fluorine-18 fluorodeoxyglu-cose positron emission tomography in mature T-cell and natural killer cell ma-lignancies. Recently in Blood, Schonthal and colleagues reported in an elegant study that green tea polyphenols interact directly with bortezomib and other boronic acid–based proteasome inhibitors and block their anticancer effects. 1 This subject has significant practice implications. By re...

2017
Marion Lanier Derek C Cole Yelena Istratiy Michael G Klein Phillip A Schwartz Richard Tjhen Andy Jennings Mark S Hixon

Serine hydrolases are susceptible to potent reversible inhibition by boronic acids. Large collections of chemically diverse boronic acid fragments are commercially available because of their utility in coupling chemistry. We repurposed the approximately 650 boronic acid reagents in our collection as a directed fragment library targeting serine hydrolases and related enzymes. Highly efficient hi...

Journal: :Organic & biomolecular chemistry 2016
Adam J Close Paul Kemmitt S Mark Roe John Spencer

A series of tetrasubstituted aromatics has been synthesized, many of which are based on elaborated N-methyliminodiacetic acid (MIDA)-boronates. A sequence employing nitration, bromination, stepwise Suzuki-Miyaura (SM) coupling with a boronic acid, then base-mediated unmasking of the boronic acid from the MIDA-boronate and a second SM-coupling has led to our desired, mainly 1,2,4,5-substituted t...

Journal: :jundishapur journal of microbiology 0
mona wassef department of clinical and chemical pathology, faculty of medicine, cairo university, giza, egypt iman behiry department of clinical and chemical pathology, faculty of medicine, cairo university, giza, egypt mariam younan department of clinical and chemical pathology, faculty of medicine, cairo university, giza, egypt nancy el guindy department of clinical and chemical pathology, faculty of medicine, cairo university, giza, egypt sally mostafa department of clinical and chemical pathology, faculty of medicine, cairo university, giza, egypt emad abada department of botany and microbiology, faculty of science, helwan university, cairo, egypt; department of biology, faculty of science, jazan university, jazan, ksa; department of botany and microbiology, faculty of science, helwan university, ain helwan, cairo, egypt. tel:+20-225552468, fax:+20-225552468

background: ampc type β-lactamases are commonly isolated from extended-spectrum cephalosporin-resistant gram-negative bacteria. also, resistance appeared in bacterial species not naturally producing ampc enzymes. therefore, a standard test for the detection of the plasmid-mediated ampc enzyme and new breakpoints for extended spectrum cephalosporins are urgently necessary. objectives: to detect ...

Journal: :journal of medical bacteriology 0
leila azimi antimicrobial resistance research center, tehran university of medical sciences, tehran, ir iran and department of microbiology, faculty of medicine, tehran university of medical sciences, tehran, ir iran. abdolaziz rastegar-lari antimicrobial resistance research center, tehran university of medical sciences, tehran, ir iran and department of microbiology, faculty of medicine, tehran university of medical sciences, tehran, ir iran. malihe talebi department of microbiology, faculty of medicine, tehran university of medical sciences, tehran, ir iran. amirmorteza ebrahimzadeh-namvar antimicrobial resistance research center, tehran university of medical sciences, tehran, ir iran. somayeh soleymanzadeh-moghadam antimicrobial resistance research center, tehran university of medical sciences, tehran, ir iran.

b ackground : one of the main mechanisms of resistance to carbapenems is potential of klebsiella pneumoniae to produce k . pneumoniae carbapenemase (kpc). kpc is an important type of carbapenemase, which can hydrolyze carbapenems and other beta-lactam antibiotics. modified hodge test (mht) and  use  of  boronic  acid  as  a  kpc  inhibitor  are  two  types  of  phenotypic methods, which are use...

Journal: :Dalton transactions 2016
Hedi Karoui Chris Ritchie

Three organoboron functionalized polyoxometalates have been synthesized using Schiff base chemistry including a boronic acid, its methyl ester and its trimethylene glycol ester. The compounds have been characterized in the solid state by single crystal diffraction (XRD), FT-IR and elemental analysis and in solution using 1H NMR spectroscopy.

2015
Meng Li Su‐Ying Xu Andrew J. Gross Jules L. Hammond Pedro Estrela James Weber Karel Lacina Tony D. James Frank Marken

The interaction of ferrocene-boronic acid with fructose is investigated in aqueous 0.1 m phosphate buffer at pH 7, 8 and 9. Two voltammetric methods, based on 1) a dual-plate generator-collector micro-trench electrode (steady state) and 2) a square-wave voltammetry (transient) method, are applied and compared in terms of mechanistic resolution. A combination of experimental data is employed to ...

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