نتایج جستجو برای: rrna gene
تعداد نتایج: 1153532 فیلتر نتایج به سال:
the lactic acid bacteria (lab) are an industrially important group of probiotic organisms that play an important role in human health by inhibiting harmful and pathogen bacteria growth, boosting immune function, and increasing resistance to infection. this study aimed to isolate, identify, and biologically characterize probiotic lab strains from iranian traditional dairy products. a total of 2...
Ribosomal genes are strongly regulated dependent on growth phase in all organisms, but this regulation is poorly understood in Archaea. Moreover, very little is known about growth phase-dependent gene regulation in Archaea. SSV1-based lacS reporter gene constructs containing the Sulfolobus 16S/23S rRNA gene core promoter, the TF55α core promoter, or the native lacS promoter were tested in Sulfo...
زمینه و اهداف: باکتری داخل سلولی wolbachia pipientis از جمله باکتری های ریکتزیایی است. ژن این باکتری در حشرات به صورت مادرزادی به ارث می رسد و می تواند عامل ایجاد ناسازگاری های سیتوپلاسمی باشد. این باکتری به طور بالقوه می تواند در دستکاری های ژنتیکی جمعیت و کنترل ناقلین برخی بیماری ها مفید باشد. در این مطالعه w. pipientis با استفاده از روشpcr در پشه خاکی گونه فلبوتوموس پاپاتاسی، ناقل بیماری لیش...
concentrations of zn, cu, cr, cd, pb and fe in surface marine sediments of the southern coast of sfax were studied in order to understand current metal contamination at the outlet of a mixed industrial and domestic wastewater effluent discharged into the seawater since 1953. we found that heavy metal concentrations (mg/kg dry weight) in surface marine sediments varied from 42 to 391 for zn, 15 ...
concentrations of zn, cu, cr, cd, pb and fe in surface marine sediments of the southern coast of sfax were studied in order to understand current metal contamination at the outlet of a mixed industrial and domestic wastewater effluent discharged into the seawater since 1953. we found that heavy metal concentrations (mg/kg dry weight) in surface marine sediments varied from 42 to 391 for zn, 15 ...
Occurrence of cyst nematode Heterodera daverti Wouts and Sturhan 1978 (Wouts & 1978) is reported from Australia for the first time. Cysts were recovered soil samples collected a hop farm in Merriang, Victoria. Morphological morphometric characteristics cysts second stage juveniles match those described this species other parts world. Identification was further supported by molecular evidence th...
The biogenesis of ribosomes in vivo is an essential process for cellular functions. Transcription of ribosomal RNA (rRNA) genes is the rate-limiting step in ribosome biogenesis controlled by environmental conditions. Here, we investigated the role of folate antagonist on changes of DNA double-strand breaks (DSBs) landscape in mouse embryonic stem cells. A significant DSB enhancement was detecte...
background and objectives: the development of molecular biological techniques provide a method for direct detection and identification of pathogens. this study attempted to compare bacterial culture and pcr to detect s. agalactiae in cattle milk samples. the pcr method was based on using primers v1 and v2 derived from the 16s rrna gene. materials and methods: one hundred milk samples were colle...
In eukaryotic cells, ribosomal RNA (rRNA) gene is transcribed by RNA polymerase I (pol I) in the nucleolus as a large (40 S-47 S) precursor RNA (pre-rRNA) (for reviews, see refs. [1,2]). The mature rRNA species (28 S, 18 S and 5.8 S) are formed after a series of specific endonucleolytic cleavage reactions (for a review, see ref. [3]). The rRNA gene (rDNA) is highly reiterated and is arranged in...
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