نتایج جستجو برای: temperature stress

تعداد نتایج: 869349  

2006
Nobuhiro Suzuki Ron Mittler

doi: 10.1111/j.1399-3054.2005.00582.x Temperature stress can have a devastating effect on plant metabolism, disrupting cellular homeostasis, and uncoupling major physiological processes. A direct result of stress-induced cellular changes is the enhanced accumulation of toxic compounds in cells that include reactive oxygen species (ROS). Although a considerable amount of work has shown a direct ...

F. Shekari H. HABIBI M. Afshari M.H. FOTOKIAN R. Azimkhani

The possible alleviating effects of salicylic acid on protection of cowpea (Vigna unguiculata) cv. Parastu under water stress conditions were investigated in the University of Zanjan Agriculture Research Station during 2008. Water stress was imposed by withholding irrigation at 50% flowering (flowering water stress, FWS) and when 50% of the pods grew 2-3cm (pod-formation water stress, PFWS). Sa...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تبریز 0

a semi-empirical mathematical model for predicting physical part of ignition delay period in the combustion of direct - injection diesel engines with swirl is developed . this model based on a single droplet evaporation model . the governing equations , namely , equations of droplet motion , heat and mass transfer were solved simultaneously using a rung-kutta step by step unmerical method . the...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه صنعتی خواجه نصیرالدین طوسی - دانشکده علوم 1391

abstract in the present research solution of chalcopyrite in sulfuric acid in hydrometallurgy method using electrochemistry with cyclic voltammetry technique has been investigated. the value of maximum reduction peak current of copper ions represents the measure of solubility. in this research different parameters temperature, potential, potential exert time, chalcopyrite concentration, sulfur...

Journal: :journal of agricultural science and technology 2011
s. velineni g. p. brahmaprakash

inoculation of phosphate-solubilizing microorganisms along with rock phosphate is known to enhance the available p from soil. the success of such solubilization is largely dependent on the ability of the inoculant strain to survive under adverse environmental conditions. in this context, liquid inoculants are gaining importance and are becoming popular with longer shelf-life. in the present inv...

2014
Kohei Takeda Ryosuke Matsui Hisaaki Tobushi Elzbieta A. Pieczyska

The transformation-induced stress relaxation and stress recovery of TiNi shape memory alloy (SMA) in stress-controlled subloop loading were investigated based on the local variation in temperature and transformation band on the surface of the tape in the tension test. The results obtained are summarized as follows. (1) In the loading process, temperature increases due to the exothermic martensi...

2008
Nagesh Babu

Abiotic stresses, such as high temperature, and salt stress are major factors which reduce crop productivity. Effects of high temperature (46-48° C) and salt stress (0.4 M) on French bean (Phaseolus vulgaris), a major vegetable crop, were evaluated in terms of antioxidants and antioxidant enzymes in S-9 cultivar. Both stresses caused similar responses in the plant. Oxidative stress indicators s...

2007
G. B. OLSON

Low-temperature plastic flow in TRIP steels has been found to be controlled by stress-assisted isothermal martensitic transformation. For these conditions, the thermodynamics and kinetic theory of martensitic transformations leads directly to constitutive relations predicting the dependence of flow stress on temperature, strain, strain-rate, and stress-state, consistent with the observed behavi...

Journal: :تحقیقات نظام سلامت 0
احسان حاجی عظیمی کارشناس ارشد، گروه بهداشت حرفه ای، دانشکده پزشکی، دانشگاه تربیت مدرس، تهران، ایران.) علی خوانین دانشیار، گروه بهداشت حرفه ای، دانشکده پزشکی، دانشگاه تربیت مدرس، تهران، ایران. اردلان سلیمانیان کارشناس ارشد، گروه بهداشت حرفه ای، دانشکده پزشکی، دانشگاه تربیت مدرس، تهران، ایران فیروز ولی پور مربی، مرکز تحقیقات پژوهشگاه بهداشت، دانشگاه علوم پزشکی بقیه الله (عج)، تهران، ایران. حبیب اله دهقان مربی، گروه بهداشت حرفه ای، دانشکده بهداشت، دانشگاه علوم پزشکی اصفهان، اصفهان، ایران

background: heat stress is one of the agents in the work environment that can create numerous problems for workers. the objective of this research is to study heat stress control in the foundry platform of a steel plant in tehran. methods: in this experimental study, controlling plans were demonstrated for the work conditions improvement in one of steel plant's foundry platforms. for controllin...

Regarding the differences between shoot and root optimum growth temperature and the impress of temperature on root function specially nutrient absorption this study was aimed to investigate the effect of low root temperature with three nitrogen levels in lettuce. The experiment was conducted in factorial completely randomized trial design with five replication. Treatments were used including th...

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