نتایج جستجو برای: fourth concentration of ringer solution two days after bacterial application
تعداد نتایج: 21483388 فیلتر نتایج به سال:
terms of address as an important linguistics items provide valuable information about the interlocutors, their relationship and their circumstances. this study was done to investigate the change route of persian address terms in the two recent centuries including three historical periods of qajar, pahlavi and after the islamic revolution. data were extracted from a corpus consisting 24 novels w...
PLATES 53 AND 54. In previous articles I it has been demonstrated that connective tissue cells grow actively outside of the organism for more than four months and thane a fragment of heart still pulsates after more than ioo days of life in vitro. The purpose of this article is to describe the continuation of these experiments. The cultures of connective tissue on which Dr. Carrel made his obser...
the purpose of the research is to examine if integrating cooperative learning into vocabulary learning helps to increase word recognition of students in an elementary school in iran. it tries to investigate whether cooperative learning approach enables students to improve their language learning. this research used stad (students team achievement division) as a cooperative model in this study. ...
background: well-controlled clinical studies in the developed world have shown that probiotics can shorten the duration of acute non-bacterial diarrhea. we aimed to evaluate the efficacy of a probiotic consisting of a mixture of lactobacillus acidophilus and bifidobacterium bifidum in the treatment of young children with acute diarrhea in mashad, iran methods: sixty-two hospital inpatients ag...
although there are studies on pragmatic assessment, to date, literature has been almost silent about native and non-native english raters’ criteria for the assessment of efl learners’ pragmatic performance. focusing on this topic, this study pursued four purposes. the first one was to find criteria for rating the speech acts of apology and refusal in l2 by native and non-native english teachers...
in the past couple of decades sociocultural theory of sla and its implications in efl contexts have attracted attentions of research circles worldwide and aroused some controversies. firth and wagner (1997) have questioned the principles of the cognitive view which gives importance to mental constructs in favor of sociocultural view which highlights social and contextual constructs. but if soci...
The effects of Lathyrus sativus neurotoxin were studied on the cell membrane potential and cellular cation composition in Retzius nerve cells of the leech Haemopis sanguisuga, with ion-selective microelectrodes using liquid ion-exchangers. Bath application of 10(-4) mol/l Lathyrus sativus neurotoxin for 3 min depolarized the cell membrane potential and decreased the input resistance of directly...
introduction because of population growth, human needs to produce raw materials have increased. different industries have developed that discharge pollutants into the environment. one type of the contaminants is heavy metals that are abundant in municipal and industrial waste waters. these compounds aren’t capable of biological degradation and in certain quantities are considered toxic to many ...
during 1980-82, a total number of 4143 stool samples, from 2332 males and 1811 females, referred to the central laboratory of the school of public health, were examined for intestinal parasites. all the specimens were examined for intestinal parasites. all the specimens were examined by formol-ether concentration and wet-mount (ringer solution) techniques. the main prevalent pathogenic parasite...
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