نتایج جستجو برای: polymerize chain reaction
تعداد نتایج: 628214 فیلتر نتایج به سال:
بیماری¬های ویروسی ناشی از نپوویروس¬ها از مخرب¬ترین بیماری¬های ویروسی مو در سراسر جهان به حساب می¬آیند که با نماتدهای خانواده longidoridae منتقل می¬شوند. اغلب این ویروس¬ها دارای میزبان¬های طبیعی متعددی در بین گیاهان زینتی و غیر زینتی، درختان میوه و علف¬های هرز می¬باشند. پیکره اعضای این جنس دو بخشی، جورقطر و به قطر حدود 30 نانومتر می¬باشد. غلظت این ویروس¬ها در گیاه و به ویژه تاک پایین است و در نت...
results 162 yeast species from 250 specimens were isolated in sabroud dextrose agar (sda) medium. 106 (65.4%) of them were germ tube formation positive, 86 (53%) chlamydoconidium formation positive and 101(62.4%) were pcr positive. yeast cells and mycelia were detected in the isolates on direct microscopic examination. c. albicans accounted for 66.04% of cases and 34% were non-c. albicans speci...
background neuroblastoma is the most common extracranial malignant solid tumor in children under 5 years, and it is characterized by wide clinical and biological heterogeneity. n-myc oncogene amplification is considered to be one of the most important prognostic factors used to evaluate survival in these patients. objectives the aim of our study was to determine amplification of the n-myc oncog...
آنزیم های dna ligase پایدار به حرارت به علت قابلیت های خود از اهمیت بالایی در زیست شناسی مولکولی برخوردارند. در این بین، آنزیم dna ligase از باکتری thermus thermophilus (tth dna ligase) با قابلیت های ویژه ی خود من جمله پایداری بالای حرارتی و دقت بالای عملکرد، می تواند کاربردهای وسیعی را در تکنیک های تشخیصی بیماری های ژنتیکی مانند تکنیک lcr (ligation chain reaction) و mlpa (multiple ligation-dep...
A highly efficient photomediated atom transfer radical polymerization protocol is reported for semi-fluorinated acrylates and methacrylates. Use of the commercially available solvent, 2-trifluoromethyl-2-propanol, optimally balances monomer, polymer, and catalyst solubility while eliminating transesterification as a detrimental side reaction. In the presence of UV irradiation and ppm concentrat...
results all eight candida species were successfully detected, identified and quantitated based on the icl gene. a seven-log range of the gene copy number and a minimum detection limit of 103 copies were achieved. conclusions a one-tube absolute quantification real-time pcr that differentiates medically important candida species via individual unique melting temperature was achieved. analytical ...
results the results showed that nl1-gc/ls2 primer set could yield species-specific amplicons, which were well distinguished and allowed better species discrimination than that generated by the its3-gc/its4 primer set, in both dgge and ttge profiles. all five candida species were discriminated by dgge and ttge using the nl1-gc/ls2 primer set. conclusions comparison of dgge and ttge profiles obta...
background aseptic meningitis is the most common type of meningitis and is characterized by meningeal inflammation that is not linked to identifiable bacterial pathogens in cerebrospinal fluid (csf). objectives this study aimed to evaluate the frequency of aseptic meningitis caused by herpesviruses, namely herpes simplex types i and ii (hsv-1, hsv-2), epstein-barr virus (ebv), cytomegalovirus (...
conclusions in the present study, the highest prevalence was for st5, which is so important for epidemiology and risk of human infection. the report related to st3 in cattle as a subtype of human showed mutual infection between human and cattle. another important point in this study was the st6 report. finally, it seems that gathering epidemiological data is needed for a better understanding of...
background toxoplasma gondii is an obligate, intracellular parasite, which is widely spread in the world. the parasite is able to infect all warm-blooded hosts including human.the infection occures via consumption of food or water containing oocytes, eatingundercooked meats containing tissue cysts, and placenta. undercooked meat consumption is one of the most important ways of toxoplasma transm...
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