نتایج جستجو برای: boronic acid

تعداد نتایج: 747997  

2015
Sarah R. Laughlin R. LAUGHLIN Binghe Wang Zhen Huang Darrell Lafain Laughlin Weixuan Chen

Boronic acids play an important role in the design and synthesis of chemosensors for carbohydrates due to their ability to reversibly bind with diol-containing compounds. Along this line, the availability of boronic acids that change fluorescence upon sugar binding is critical to a successful sensor design effort. Here, two boronic acids that show strong fluorescent intensity changes upon sugar...

2014
Yuya Egawa Ryotaro Miki Toshinobu Seki

In association with increasing diabetes prevalence, it is desirable to develop new glucose sensing systems with low cost, ease of use, high stability and good portability. Boronic acid is one of the potential candidates for a future alternative to enzyme-based glucose sensors. Boronic acid derivatives have been widely used for the sugar recognition motif, because boronic acids bind adjacent dio...

Journal: :journal of medical bacteriology 0
leila azimi antimicrobial resistance research center, iran university of medical sciences, tehran, ir iran and deparment of microbiology, iran university of medical sciences, tehran, ir iran. malihe talebi deparment of microbiology, iran university of medical sciences, tehran, ir iran. parviz owlia molecular microbiology research center, shahed university, tehran, ir iran. abdolaziz rastegar-lari antimicrobial resistance research center, iran university of medical sciences, tehran, ir iran and deparment of microbiology, iran university of medical sciences, tehran, ir iran.

background : gram-negative bacteria are the most cause of nosocomial infection especially in burned patients. carbapenem resistant strains can limit seriously the choice of antibiotic therapy. ampc can make resistance to carbapenem and detection of that can be useful for identification of carbapenem resistant. the aim of this study was identification of ampc in most prevalent cause of nosocomia...

Journal: :Accounts of chemical research 2013
Steven D Bull Matthew G Davidson Jean M H van den Elsen John S Fossey A Toby A Jenkins Yun-Bao Jiang Yuji Kubo Frank Marken Kazuo Sakurai Jianzhang Zhao Tony D James

Boronic acids can interact with Lewis bases to generate boronate anions, and they can also bind with diol units to form cyclic boronate esters. Boronic acid based receptor designs originated when Lorand and Edwards used the pH drop observed upon the addition of saccharides to boronic acids to determine their association constants. The inherent acidity of the boronic acid is enhanced when 1,2-, ...

2014
James W B Fyfe Ciaran P Seath Allan J B Watson

Control of boronic acid solution speciation is presented as a new strategy for the chemoselective synthesis of boronic esters. Manipulation of the solution equilibria within a cross-coupling milieu enables the formal homologation of aryl and alkenyl boronic acid pinacol esters. The generation of a new, reactive boronic ester in the presence of an active palladium catalyst also facilitates strea...

Journal: :Chemical communications 2009
Shan Jin Gaurav Choudhary Yunfeng Cheng Chaofeng Dai Minyong Li Binghe Wang

Fluoride has been found to protect boronic acids from copper(i)-mediated decomposition; such findings should be very useful for the preparation of boronic acid-based carbohydrate sensors and boronic acid conjugates using the copper(i)-mediated click reaction.

2016
Gertjan Vancoillie Richard Hoogenboom

Boronic acid-containing (co)polymers have fascinated researchers for decades, garnering attention for their unique responsiveness toward 1,2- and 1,3-diols, including saccharides and nucleotides. The applications of materials that exert this property are manifold including sensing, but also self-regulated drug delivery systems through responsive membranes or micelles. In this review, some of th...

2014
Zhifeng Xu Khan Mohammad Ahsan Uddin Tripta Kamra Joachim Schnadt Lei Ye

Boronic acid affinity gels are important for effective separation of biological active cis-diols, and are finding applications both in biotech industry and in biomedical research areas. To increase the efficacy of boronate affinity separation, it is interesting to introduce repeating boronic acid units in flexible polymer chains attached on solid materials. In this work, we synthesize polymer b...

2005
Chen Zhang Kenneth S. Suslick

Boronic-acid-based dyes have been widely studied in the past decade as potential sensors for sugars and carbohydrates, owing to the strong interaction of boronic acid and diols. In this work, two boronic-acid-appended metalloporphyrins were synthesized by new routes and tested as potential sugar and carbohydrate sensors. Boronic acid substituents were attached either to a βpyrrolic position ((2...

Journal: :jundishapur journal of microbiology 0
saeed falahat molecular and medicine research center, arak university of medical sciences, arak, ir iran mana shojapour phd student, department of molecular medicine, school of advanced technologies in medicine, tehran university of medical sciences, tehran, ir iran abdorrahim sadeghi molecular and medicine research center, department of biochemistry and genetics, arak university of medical sciences, arak, ir iran; molecular and medicine research center, department of biochemistry and genetics, arak university of medical sciences, arak, ir iran. tel: +98-8634173502

background bacterial resistance to antibiotics has become a major source of concern for public health. pseudomonas aeruginosa strains are important opportunistic pathogens. these bacteria have a high resistance to a wide range of existing antimicrobials and antibiotics. objectives the present study was performed to evaluate the frequency of kpc in p. aeruginosa isolated from clinical samples of...

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