نتایج جستجو برای: 2 and very severe drought less than
تعداد نتایج: 17340654 فیلتر نتایج به سال:
Introduction: Traditional Iranian medicine (TIM) is accompanied by little side effects in experience. The mechanisms involved in TIM are not much clear. The purpose of this study is assessment of differences of warm and cold nature persons in neuroendocrine system and cytokine pattern (Th1/Th2) of immune responses. Methods: Thirty seven 20 to 40 years old male volunteers were divided into 2 ...
this study investigated the impact of explicit instruction of morphemic analysis and synthesis on the vocabulary development of the students. the participants were 90 junior high school students divided into two experimental groups and one control group. morphological awareness techniques (analysis/synthesis) and conventional techniques were used to teach vocabulary in the experimental groups a...
in this thesis, barium ferrite nano particles were prepared by sol-gel method. their structural and magnetic properties of samples have been investigated using thermo gravimetric analysis (tg-dta), x-ray powder diffractometer (xrd), fourier transform infrared (ftir), scanning electron microscopy (sem), field emission scanning electron microscopy (fesem), ac susceptometer, vibrating sample magne...
in this paper by using the data related to the monthly precipitation of 13 stations situated in west azerbaijan province of iran in a time period of 34 years, monitoring and forecasting the probability of a drought occurrence is evaluated in next coming months. in this process, first the monthly precipitation amounts for each rainfall station are used in order to calculate the standardized prec...
We characterize the simple connected graphs with second largest eigenvalue less than 1/2, which consists of 13 classes specific graphs. These hint that c2∈[1/2,2+5], where c2 is minimum real number c for every greater a limit point in set eigenvalues leave it as problem.
There is a long-standing controversy as to whether drought limits photosynthetic CO2 assimilation through stomatal closure or by metabolic impairment in C3 plants. Comparing results from different studies is difficult due to interspecific differences in the response of photosynthesis to leaf water potential and/or relative water content (RWC), the most commonly used parameters to assess the sev...
Tree species differ in their physiological responses to drought, but the underlying causes are often unclear. Here we explored of radial growth centennial drought events and sap flow (Fs) seasonal four mixed forests on either moist or drier sites northwestern Switzerland. While diffuse-porous (Fagus sylvatica, Prunus avium, Tilia platyphyllos) showed marked reductions 1976 2003, two known marke...
boron nitride semiconducting zigzag swcnt, $b_{cb}$$n_{cn}$$c_{1-cb-cn}$, as a potential candidate for making nanoelectronic devices was examined. in contrast to the previous dft calculations, wherein just one boron and nitrogen doping configuration have been considered, here for the average over all possible configurations, density of states (dos) was calculated in terms of boron and nitrogen ...
the present study was concerned with exploring the frequency and linguistic focus of corrective feedback types given by novice and experienced female teachers working with young learners and compared it with those of elementary classes for adults. moreover, it aimed at measuring learners’ acknowledgement of teachers’ corrective feedback in the form of uptake in relation to linguistic coverage o...
Poplar plantations are widely used for timber production and ecological restoration in northern China, a region that experiences frequent droughts and water scarcity. An open-path eddy-covariance (EC) system was used to continuously measure the carbon, water, and energy fluxes in a poplar plantation during the growing season (i.e., April–October) over the period 2006–2008 in the Daxing District...
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