نتایج جستجو برای: control dna
تعداد نتایج: 1787258 فیلتر نتایج به سال:
background: it is estimated that about 370 million people are chronic carriers of hbv worldwide. apparently 3% of iranian populations are chronic carriers of this virus. we aimed to evaluate the viral dna in biological fluids of chronic hepatitis patients compared to a control group. methods: the current case-control study was designed to evaluate the viral dna in biological fluids of 70 chroni...
Background and Objectives: Human papilloma virus (HPV) is known as the etiologic agent of cervical cancer and second common cancer among women. HPV viruses with the elevated risk of infection have more potentiality to cause cancer. The carcinogenesis in these viruses is accomplished by oncoproteins such as E7. Employing DNA vaccines which code specific antigens such as E7 is a novel therapeutic...
Introduction: The human papilloma virus (HPV) can play a role in the development of head and neck squamous cell carcinoma (SCC). Our aim was to assess the prevalence of HPV DNA in SCC of the larynx. The impact of HPV infection on patient survival was also evaluated. Materials and Methods: This case-control study was performed in 44 patients with SCC of the larynx (case group), while the contro...
building on previous studies on the effectiveness of different types of written corrective feedback, the present study aimed at investigating whether direct focused corrective feedback and direct unfocused corrective feedback produced any differential effects on the accurate use of english articles by efl learners across two different proficiency levels (low and high). in current study, the par...
abstract the purpose of this study is twofold: on the one hand, it is intended to see what kind of noticing-the –gap activity (teacher generated vs. learner generated) is more efficient in teaching l2 grammar in classroom language learning. on the other hand, it is an attempt to determine which approach of the noticing-the-gap- activity is more effective in the long- term retention of grammar...
the aim of this study is investigating the effect of teaching “metacognitive strategies” on the way which scientific information retrieval workes by the using of google scholar searching machine on the students of ms in the psycology & education faculty of allameh tabatabayi university in 2007-2008 academic year. the statistical community was the students of ms in psychology & education facult...
abstract recent studies suggest that prelistening activities play an important role in the development of listening comprehension (e.g. long 1990;chiang and dunkel 1992; schmidt-rinehart 1994; jensen and hansen 1995; robinson et al., 1995; buck, 1995; foster and skehan,1996; teng 1996; robinson, 2001; chang and read 2006). in line with previous studies and to shed light on a new aspect of sche...
in recent years, several plant species have been used as bioindicators, and several tests have been developed to evaluate the toxicity of the environmental contaminants. in this study, the root length and dna band pattern of root tips in maize (zea mays l.) seedlings were exposed at different concentration of cadmium pollutant (40 and 80 mg l−1). the results indicated that the root length of ma...
DNA-based materials have attracted interest due to the tunable structure and encoded biological functionality of nucleic acids. A simple general approach synthesize with fine control over morphology bioactivity is important expand their applications. Here, we report synthesis particles via supramolecular assembly tannic acid (TA) DNA. Uniform different morphologies are obtained using a variety ...
Background: Varicocele is considered as a common cause of male infertility and can affect spermatogenesis. In addition, it also predisposed sperm to chromatin damage and morphological alternation. Other factors, such as environmental and genetic conditions also predispose sperm to these conditions. To answer this question, we aimed to evaluation of DNA fragmentation and protamine deficiency thr...
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