نتایج جستجو برای: pcr polymerase chain reaction
تعداد نتایج: 810995 فیلتر نتایج به سال:
background and objective: formalin-fixed paraffin-embedded tissues are a valuable source of dna for molecular studies. we designed and optimized an efficient procedure for dna extraction from formalin-fixed paraffin embedded tissues. materials and methods: seventy three blocks of cervical paraffin-embedded tissues were investigated. dna was extracted using 45 minutes boiling in alkaline solutio...
background: classical bacteriological detection of brucella species from food, and environment is routinely carried out based on morphological and biochemical characteristics. however, for increasing specificity and sensitivity of species identification methods, development of a molecular assay is necessary that was main aim of this study. methods: panel of some reference strains belonging to t...
background: one of the adulterant practice in dairy industry is the use of a less costly type of milk such as cow and goat milk instead of more expensive ones especially sheep milk. the aim of the present study was to assess fraud identification of undeclared milk species in composition of sheep yogurt and cheese offered as “pure sheep” in iranian local markets. methods: samples of sheep yogurt...
foodborne pathogens comprise microorganisms such as viruses, bacteria and parasites that can be transmitted by food and affect public health worldwide. the most common viruses transmitted via food are hepatitis a virus and norwalk-like caliciviruses. also, the most common bacteria involved in foodborne illnesses are campylobacter jejuni, clostridium perfringens, salmonella spp, escherichia coli...
purpose: to compare the value of conventional laboratory methods and polymerase chain reaction (pcr) in the diagnosis of fungal keratitis. methods: this cross sectional study was conducted at khalili hospital, shiraz, iran. samples were taken from thirty-eight patients with findings suspicious for fungal keratitis. corneal scrapings were used for gram, giemsa and koh stains, culture and pcr ana...
سرطان مری با 386000 مرگ و میر در سال ششمین عامل مرگ ناشی از سرطان در جهان است، این سرطان مانند سایر سرطان ها حاصل مجموعه عامل های محیطی و تغییرات ژنتیکی است .شیوع سرطان مری در ایران بسیار بالاست. از این لحاظ بالاتر از سایر کشورها قرار داریم. میزان بروز جهش در ژن p53 در هر دو نوع سرطان مری (کارسینوم سلول سنگفرشی مری escc و آدنوکارسینوم مری eac ) بالا گزارش شده است. p53 یکی از شناخته شده ترین ژن ...
زمینه و هدف: پریودونتیت یکی از شایع ترین بیماری های دهان و دندان می باشد که میزان شیوع آن در جوامع مختلف متغیر بوده و باکتری های زیادی در اتیولوژی این بیماری دخیل هستند. هدف از انجام این مطالعه بررسی میزان فراوانی و شناسایی باکتری های غالب پریودونتوپاتوژن در مبتلایان به پریودونتیت با استفاده از دو روش کشت و مولکولی بود. روش بررسی: در این بررسی صد نمونه از صد بیمار مبتلا به پریودونتیت بالغین شام...
The origin of horse, dog, cat, bovine, sheep, porcine, and goat meat was determined by the polymerase chain reaction (PCR) technique, using species-specific primers. Test mixtures of meat were prepared by adding 5%, 2.5%, 1%, 0.5%, and 0.1% levels of pork, horse, cat, or dog meat to beef, sheep, and goat meat. Samples taken from those combinations were analyzed by PCR for species determination....
RAS mutation analysis is an important companion diagnostic test. Treatment of colorectal cancer with anti-Epidermal Growth Factor Receptor (EGFR) therapy requires demonstration of RAS mutation status (both KRAS and NRAS), and it is good practice to include BRAF. In Non-Small Cell Lung Cancer (NSCLC) and melanoma, assessment of RAS mutation status can be helpful in triaging patient samples for m...
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