نتایج جستجو برای: experimental unit
تعداد نتایج: 1081061 فیلتر نتایج به سال:
the present study was conducted to investigate the role of summary in teaching grammar process on pre-university students. to this end, 48 male pre-university students in semnan were participants. they were math class that we called experimental group and science class as control group. in order to make sure there was no significant difference in proficiency level of two groups. a pre-test wa...
To the Editor-Eaton et al. [1] recently described experiments with coccoid Helicobacter pylori in gnotobiotic piglets. This interesting study examined the colonization and the reversion from coccoid to bacillary H pylori within 2 weeks of inoculation. Piglets colonized with bacillary H pylori had more severe gastritis 2 weeks after inoculation than did those sacrificed 1 week after inoculation....
The goal of this experiment was to investigating of effects of different levels of nano chromium (N-Cr) in diet on egg quality and blood chromium content of japanese quail. Two hundred and forty laying japanese quail (45 day old) were randomly distributed to 20 experimental unit with 12 birds in cage pens of 40 × 80 cm. Experimental treatments include: 1) control national research council (NRC,...
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...
در این پژوهش از روش آماری سطح پاسخ جهت بهینه سازی شرایط فرآیند هیدرولیز پروتئین روده و معده ی گوسفند با استفاده از آنزیم آلکالاز (2.4l)، استفاده شد. فاکتورهای مورد بررسی در این تحقیق دما، زمان و نسبت آنزیم به سوبسترا بودند که برای رسیدن به بیشترین میزان درجه هیدرولیز و بازیافت نیتروژن این متغییرها در محدوده ی دمای 52-43 درجه سانتیگراد، زمان 190-65 دقیقه و مقدار آنزیم 95-50 (anson unit/kg protei...
this study investigated the effect of prior knowledge on the listening comprehension performance of fl learners. twenty students, male and female, drawn from the two intact groups of the senior and junior english language and literature majors were chosen as the participants of this study . the two groups were then randomly assigned into the experimental and control group. the experimental gr...
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