The pathogen group A Streptococcus (GAS) produces a wide spectrum of infections including necrotizing fasciitis (NF). Streptolysin S (SLS) produces the hallmark beta-haemolytic phenotype produced by GAS. The nine-gene GAS locus (sagA-sagI) resembling a bacteriocin biosynthetic operon is necessary and sufficient for SLS production. Using precise, in-frame allelic exchange mutagenesis and single-...

results the results showed that the fiber diameter and the amount of loratadine affected the drug release and the disappearance time of nanofibers. the smaller the fiber diameter and drug amount, the faster the solubility and the release time of nanofibers. conclusions it was concluded that electrospinning can be a suitable method for preparing fast-dissolving loratadine nanofibers. materials a...

SAGD (Steam Assisted Gravity Drainage) is used in Canadian fields where there are interlayers that impede steam chamber development and thus production. Many experiments have been conducted on the effect of oil recovery. However, swelling characteristics under different conditions, as well possible clay mineral transformation particle migration particles at high temperatures, rarely studied. In...

Steam assisted gravity drainage is a thermal method for enhanced bitumen recovery. In this method, steam injected to and heavy oil reduce the viscosity make mobile. However, early breakthrough of in some parts well results loss required amount contact with cold bitumen, poor distribution chamber. This limits production increases SAGD operation cost. Autonomous inflow control valve (AICV) able p...

background: lymphadenitis is a common form of extra-pulmonary tuberculosis. as in peripheral health centers, the facili­ties for histopathology and culture are lacking, material obtained by fine needle aspiration (fna) in suspected cases of tubercu­lar lymphadenitis (tbl) cid fast bacilli (afb) by ziehl neelson method as every designated micros­copy centre under revised national tuberculosis co...

literature concerning the effects of ramadan fasting on sports performance presents conflicting results. in this context, some studies reported a significant impairment of sports performance during the month of ramadan. however, other studies suggested that ramadan fasting has no significant effect on physical performance.  the discrepancies between the studies could be explained by time-of-day...

results in this study after coding the transcribed interviews, the findings were categorized into three main themes as follows: personal views, social factors, and family factors. each theme included several categories and subcategories, and the coded sentences and phrases were placed under each category and subcategory. conclusions the results of this study showed that the number of factors pr...

objectives: falling is a common problem among the elderly. falling indoors and outdoors is highly prevalent among the iranian elderly. therefore, identification of the contributing factors at home and their modification can reduce falls and subsequent injuries inthe elderly. the goal of this study was to identify the elderly at risk of fall, using the ‘home falls and accident screening tool’ (h...