نتایج جستجو برای: m beta
تعداد نتایج: 715726 فیلتر نتایج به سال:
Background Uropathogenic Escherichia coli (UPEC) is the most important pathogen involved in urinary tract infections (UTIs). Beta-lactam antibiotics have been widely used to treat UPEC infections; however, extended-spectrum beta-lactamases (ESBLs) create significant therapeutic problems by inactivating almost all beta-lactams except cephamycins and carbapenems [1,2]. The CTX-M-type beta-lactama...
1. Paterson DL, Bonomo RA. Extendedspectrum beta-lactamases: a clinical update. Clin Microbiol Rev. 2005;18: 657–86. 2. Livermore DM, Canton R, Gniadkowski M, Nordmann P, Rossolini GM, Arlet G, et al. CTX-M: changing the face of ESBLs in Europe. J Antimicrob Chemother. 2007; [Epub 2006 Dec 6]. 3. Pitout JD, Gregson DB, Church DL, Elsayed S, Laupland KB. Community-wide outbreaks of clonally rela...
In this work, we study the following class of systems coupled nonlinear fractional Schrödinger equations, \begin{equation*} \left \{ \begin{array}{l} (-\Delta)^s u_1 + \lambda_1 = \mu_1 |u_1|^{2p-2}u_1 \beta |u_2|^{p} |u_1|^{p-2}u_1 \quad\text{in }\mathbb{R}^N, \\[3pt] u_2 \lambda_2 \mu_2 |u_2|^{2p-2}u_2 |u_1|^{p}|u_2|^{p-2}u_2 \end{array} \right. \end{equation*} where $ u_1,\, u_2\in W^{s,2}(\...
An increase in the number of tuberculosis cases caused by multiple-drug-resistant strains of Mycobacterium tuberculosis has stimulated search for new antituberculous agents. Beta-lactam antibiotics, traditionally regarded as ineffective against tuberculosis, merit consideration. Four major penicillin-binding proteins (PBPs) with approximate molecular sizes of 94, 82, 52, and 37 kDa were detecte...
Dialysis-related amyloidosis is characterized by the deposition of insoluble fibrils of beta(2)-microglobulin (beta(2)-m) in the musculoskeletal system. Atomic force microscopy inspection of ex vivo amyloid material reveals the presence of bundles of fibrils often associated to collagen fibrils. Aggregation experiments were undertaken in vitro with the aim of reproducing the physiopathological ...
Mycobacterium fortuitum and Mycobacterium chelonei are distinguished unambiguously by the combined use of five test characters: nitrate reductase, beta-glucosidase, acid production from fructose, penicillinase, and trehalase. Typically, M. fortuitum was nitrate reductase positive, beta-glucosidase positive; M. chelonei was nitrate reductase negative, beta-glucosidase negative, penicillinase pos...
AquI DNA methyltransferase (M. AquI) catalyzes the transfer of a methyl group from S-adenosyl-L-methionine to the C5 position of the outermost deoxycytidine base in the DNA sequence 5'-CCCGGG-3'. M. AquI is a heterodimer in which the polypeptide chain is separated at the junction between the two equivalent structural domains in the related enzyme M. HhaI. Recently, we reported the subcloning, o...
Background and Objective: Alzheimer’s disease (AD) is one of the most common neurodegenerative diseases and results from the extracellular accumulation of b-amyloid peptides and the resulting neuronal dysfunction. In this study, the role of nicotinic acetylcholine receptors, protein kinase B (PKB) and protein kinase M (PKM) were evaluated in order to examine the mechanism of the protective effe...
Among 235 extended-spectrum beta-lactamase-producing Klebsiella pneumoniae (ESBL) isolates collected from a nationwide surveillance performed in Taiwan, 102 (43.4%) were resistant to amikacin. Ninety-two of these 102 (90.2%) isolates were carrying CTX-M-type beta-lactamases individually or concomitantly with SHV-type or CMY-2 beta-lactamases. The armA and rmtB alleles were individually detected...
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