نتایج جستجو برای: pcr genomic fingerprinting the isolates were collected from ricefields during 1997
تعداد نتایج: 17045362 فیلتر نتایج به سال:
ninety one monoconidial bipolaris isolates were obtained from lesions on different parts of rice in different locations of mazandaran province during the summer of 2009. bipolaris species were identified using morphological features such as color and shape of colony and color and size of conidia and conidiophores. the isolates were separated into two species; 85 (93.4%) isolates belonged to bip...
abstract the purpose of this study was to find out the effect of applying the principles of group-dynamic assessment (g-da) on learning of conditional structures in english by iranian efl learners at the intermediate level, which according to the formal educational system in iran, includes students who are in their second year of studying in high schools of koohdasht city. this study was a qua...
BACKGROUND Vibrio cholerae is the causative organism of waterborne disease, cholera. V. cholerae has caused many epidemics and pandemics of cholera for many years. In this study, V. cholerae recovered from edible ice were investigated for their genetic diversity using Enterobacterial Repetitive Intergenic Consensus (ERIC) PCR and Repetitive Extragenic Palindromic (REP) PCR. Isolation was done u...
The scope of this study was to characterize the intra-serotypic genetic diversity in fecal Escherichia coli isolates obtained from dogs, using enterobacterial repetitive intergenic consensus (ERIC)-PCR. Serological typing of forty-seven E. coli isolates recovered from the rectal swabs (n=93) of different dog breeds in Andhra Pradesh revealed O141 (5 isolates), O128 (3 isolates), O126 (2 isolate...
according to coates’s (2004, as cited in zhang, 2010) definition of "conversational dominance" (p.111), it refers to the phenomenon of a speaker dominating others in interaction. specifically, it means how a speaker makes use of certain strategies to get the floor and maintain the floor. thus, the amount of talk is the main measurement for the dominance of the conversation. whether a speaker do...
this study investigated the effects of planning on second-language written production with regard to task type. the participants were 75 iranian learners of english as a foreign language attending a private foreign language institution. they were asked to complete two different types of writing tasks (expository writing task and argumentative writing task) in different planned conditions (indiv...
To assess the extent of genotypic and phenotypic diversity within species of purple nonsulfur bacteria found in aquatic sediments, a total of 128 strains were directly isolated from agar plates that had been inoculated with sediment samples from Haren and De Biesbosch in The Netherlands. All isolates were initially characterized by BOX-PCR genomic DNA fingerprinting, and 60 distinct genotypes w...
pathogenicity and genetic variability of 13 fusarium oxysporum isolates collected from sugar beet field of six provinces of iran during 1999- 2008 were evaluated. pathogenic variability of the isolates was determined using a root-dip assay in spore suspension in test tubes for four- week plants. the isolates were classified into strong and weak pathogenic groups. a total of 15 rapd primers were...
Background: Several virulence factors have been described in pathogenesis of Staphylococcus aureus strains. Staphylococcal Enterotoxins(SEs) that is one of the most factors, are belonging to important members of bacterial superantigens. Superantigens are defined by their ability to stimulate cytokine release from both T cells and macrophages. 13 different SEs are known that their function is no...
from 1950s onward, new theories and critical approaches burgeoned across humanities. these theories were context-oriented; as a result, the analysis of discursive practices gained significance. thus, social, political, historical and cultural discourses that have been hitherto marginalized and considered inferior to literary texts, were introduced as important texts to be analyzed by critics. o...
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