نتایج جستجو برای: psychrobacter sp csw4
تعداد نتایج: 120343 فیلتر نتایج به سال:
background identification of novel pathogenic bacteria always has a crucial role in clinical microbiology to defeat uncontrolled diseases. objectives sample preparation platform has been developed for rapid and simple detection of infectious organisms from the point of care diagnostics and molecular manipulation by using three novel genomic dna isolation protocols. materials and methods most of...
به منظور بررسی تراکم سلولی و تعیین محتوی کلروفیلa دو ریز جلبکskeletonema sp. و tetraselmis sp. با استفاده از محیط کشت 2f/ تحت شوری های مختلف 15،20،25،30،35قسمت در هزار در 15 جعبه 5/1 لیتری پلاستیکی با تراکم 104×18 سلول در میلی لیتر تحت شرایط دمای 2 20 درجه سانتی گراد و شدت روشنایی 5000 لوکس و دوره روشنایی 24 ساعته کشت داده شدند.کشت تتراسلمیس به مدت 14 روز و اسکلتونما به مدت 7روز به طول انجامید...
امروزه فلزات سنگین به یکی از خطرناک ترین مسائل زیست محیطی جهانی تبدیل شده اند. آلودگی فلزات سنگین در اکوسیستم های آبی بر ریزجلبک ها و زوپلانکتون ها تأثیر گذار است، بیومس و فراوانی گونه ها را تغییر داده و روابط درون گونه ای را به سمت غالبیت گونه های کمتر حساس به پیش می برد. در این تحقیق اثر تنش کوتاه مدت غلظت های مختلف فلز سنگین کادمیم بر دو میکرو آلگ سیانوباکتری anabaena sp. و جلبک سبز chlorell...
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Microbes are now well regarded for their important role in mammalian health. The microbiology of skin--a unique interface between the host and environment--is a major research focus in human health and skin disorders, but is less explored in other mammals. Here, we report on a cross-population study of the skin-associated bacterial community of humpback whales (Megaptera novaeangliae), and exam...
A Psychrobacter psychrophilus strain resistant to tetracycline and streptomycin was isolated from a 15,000-35,000-year-old permafrost subsoil sediment sampled from the coast of the Eastern-Siberian Sea. The genes conferring antibiotic resistance were localized on an c. 30-kb pKLH80 plasmid. It was shown that the antibiotic resistance region of this plasmid has a mosaic structure and contains cl...
The aim of this study was to determine possible differences in the faecal microbiota of dairy cows infected with Mycobacterium avium subsp. paratuberculosis (Johne's disease) in comparison with noninfected cows from the same herds. Faecal samples from cows in 4 herds were tested for M. avium subsp. paratuberculosis by real-time PCR, and faecal bacterial populations were analysed by 454 pyrosequ...
Microbial growth on meat to unacceptable levels contributes significantly to change meat structure, color and flavor and to cause meat spoilage. The types of microorganisms initially present in meat depend on several factors and multiple sources of contamination can be identified. The aims of this study were to evaluate the microbial diversity in beefsteaks before and after aerobic storage at 4...
Bacterial cell walls contain peptidoglycan, an essential polymer made by enzymes in the Mur pathway. These proteins are specific to bacteria, which make them targets for drug discovery. MurC, MurD, MurE and MurF catalyze the synthesis of the peptidoglycan precursor UDP-N-acetylmuramoyl-L-alanyl-γ-D-glutamyl-meso-diaminopimelyl-D-alanyl-D-alanine by the sequential addition of amino acids onto UD...
The goal of this study was to identify at the species level a large collection of Gram-negative dairy bacteria isolated from milks or semi-hard and soft, smear-ripened cheeses (cheese core or surface samples) from different regions of France. The isolates were then assessed for two risk factors, antibiotic resistance and volatile and non-volatile biogenic amine production in vitro. In total, 17...
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