نتایج جستجو برای: many crosses were carried out among native
تعداد نتایج: 5121029 فیلتر نتایج به سال:
Background & objectives: Urinary Tract Infection (UTI) which unfortunately has no clear symptoms in many cases is the second prevalent infection among children after respiratory infection. This study carried out in order to determine the frequency of asymptomatic UTI among elementary school girls in one of Tehran’s suburbs (Mahalat town). Methods: In a cross sectional study, all elementary ...
Triatoma brasiliensis is composed of at least four geographic populations (brasiliensis, melanica, macromelasoma, and juazeiro) that have distinct chromatic, morphologic, biologic and ecologic patterns, and genetic composition. Reciprocal crosses between all pairwise combinations were carried out in order to evaluate the genetic and reproductive compatibility of these four populations. The F1 i...
this study investigated the potential role of age in inductive and deductive grammar learning among iranian foreign language learners. the experimental population consisted of our randomly selected samples including two groups of children (with age of exposure to english within 8-13), and two groups of adults (with age of exposure to english within 11-13). thus, the comparison was between ch...
this study investigates the effect of teacher’s repetition as an input enhancement technique in explicit teaching of vocabulary items on efl learners’ later retrieval. to this end, 66 persian speaking english learners, aged 18 - 29, homogenized through a standard proficiency test (opt), were chosen and put into two experimental and control groups, each 33 learners. general service list (gsl), a...
interspecific or intergenus hybridization in sugarbeet (b. vulgaris l.) is usually failed due to non fertilization, embryo death or absence of connection between embryo and endosperm. consequently invitro embryo rescue technique is of value to save hybrid embryos before annihilation. sugar beet inter-specific crosses with wild species is impossible in classical breeding because of no chromosoma...
The P family of transposable elements in Drosophila melanogaster transpose with exceptionally high frequency when males from P strains carrying multiple copies of these elements are crossed to females from M strains that lack P elements, but with substantially lower frequency in the reciprocal cross. Transposition is associated with enhanced mutation rates, caused by insertion and deletion of P...
SUHHARY Data obtained from 428 calves (59 Cheju native cattle 60 Br hm. ' a an Gertrudis and 269 crossbreds) were analyzed to es t~mate main eff ' d h. f ects of mental factors an eterosis. Nat~ng type, sex 0 .calf, and year of significant sources of variation on most of the we~gh ts at preweani weaning periods. Brah;-.c.,' x Chej u native cat tIe c ro ss showed hetero:~ .... on birth weight. H...
Background: Clindamycin is a suitable antibiotic for treatment of skin and soft tissue infections. Moreover, it can suppress toxin production in many pathogenic bacteria such as S. aureus. There are two mechanisms of resistance in this antibiotic. Constitutive resistance can be detected by standard disk diffusion method but in the case of inducible resistance, D-test should be carried out. The ...
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