نتایج جستجو برای: plant groups
تعداد نتایج: 1099878 فیلتر نتایج به سال:
The aim of the present study was to determine the anti depressive activity of raw, autoclaved, boiled, germinated and roasted pumpkin seeds powder extract compared with the standard drug: Imipriamine (30 mg/kg) in normal and depressed control rats. Methyl Isobutyl Ketone (100 mg/kg) was used as the depression inducer in rats. The result shows that there was a significant (P < 0.01) decrease in ...
Plants often compete with closely related individuals due to limited dispersal, leading to two commonly invoked predictions on competitive outcomes. Kin selection, from evolutionary theory, predicts that competition between relatives will likely be weaker. The niche partitioning hypothesis, from ecological theory, predicts that competition between close relatives will likely be stronger. We tes...
this research has been taken among the students of high school in karaj city during the years 1391 and 1392. this is a survey research and data gathering is through questionnaires. studying the “an analysis of students’ tendency toward non-native reference groups in karaj”. the questionnaire was distributed among 260 of these students who were chosen through multi step cluster sampling. conside...
this study compared the different effects of form-focused guided planning vs. meaning-focused guided planning on iranian pre-intermediate students’ task performance. the study lasted for three weeks and concentrated on eight english structures. forty five pre-intermediate iranian students were randomly assigned to three groups of guided planning focus-on-form group (gpfg), guided planning focus...
this study was conducted to investigate the effect of favorite-text on iranian intermediate efl learners’ vocabulary development. sixty learners from nour-al-mahdi english institute participated in the present study. having been homogenized by oxford placement test (opt), they were randomly assigned into two groups of 30, control and experimental. then both groups sat for a pre-test which was a...
OBJECTIVES The present study aimed to investigate the effects of guided imagery training on heart rate variability in individuals while performing spaceflight emergency tasks. MATERIALS AND METHODS Twenty-one student subjects were recruited for the experiment and randomly divided into two groups: imagery group (n = 11) and control group (n = 10). The imagery group received instructor-guided i...
BACKGROUND The diversity of plants and arbuscular mycorrhizal fungi (AMF) has been experimentally shown to alter plant and AMF productivity. However, little is known about how plant and AMF diversity interact to shape their respective productivity. METHODOLOGY/PRINCIPAL FINDINGS We co-manipulated the diversity of both AMF and plant communities in two greenhouse studies to determine whether th...
Globally, biological invasions can have strong impacts on biodiversity as well as ecosystem functioning. While less conspicuous than introduced aboveground organisms, introduced belowground organisms may have similarly strong effects. Here, we synthesize for the first time the impacts of introduced earthworms on plant diversity and community composition in North American forests. We conducted a...
As our understanding of developmental mechanisms in flowering plant species has become more advanced, an appreciation of the need to understand how distinct plant morphologies are generated has grown. This has led to an awareness of the key morphological differences in distinct land plant groups and to an assessment of the major innovations that occurred during land plant evolution. Recent adva...
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