abstract: about 60% of total premium of insurance industry is pertained?to life policies in the world; while the life insurance total premium in iran is less than 6% of total premium in insurance industry in 2008 (sigma, no 3/2009). among the reasons that discourage the life insurance industry is the problem of adverse selection. adverse selection theory describes a situation where the inf...

In this study, the effect of drought stress on morphological and physiological characteristics of two forest species: Alnus subcordata and Acer velutinum, which are used in natural forest restoration and afforestation, was evaluated. A factorial experiment was conducted based on a completely randomized design with two factors (two species and four levels of drought stress: (25% (severe stress),...

a simple, sensitive and selective method for solvent extraction and spectrophotemetric determination of lanthanum (ii) europium (iii), and cerium (iii) is described , the rare earth metals are extracted into chloroform solution of n-phenylbenzohydroxamic acid (pbha) at ph 9-10 various parameters are studied to optimize the extraction conditions. the molar absorptivity is found to increase from ...

Drought stress is one of the limiting factors for plant growth and yield all over the world. Stevia rebaudiana from semi-humid area of Paraguay contains steviol glycosides with pharmacological properties. In the present study, the callus obtained from Stevia rebaudiana were treated with different treatments of poly ethylene glycol, paclobutrazol and gibberellin under in vitro culture and then s...

abstract english language learning in iran has become significant in recent years, and english has been included in the curriculum of iranian schools and universities, and considerable attention has been paid to this language in our society. nevertheless, teaching and learning english in iranian schools has not been able to satisfy the specified goals, so different efl institutes have been est...

Aquaporins are the main proteins in the plasma membrane, which facilitates the movement of water, carbon dioxide, and other small soluble material through the membrane. The aim of this study was to investigate the role of root acuporine on the physiological, biochemical and biochemical changes and water relations under drought stress. For this purpose, a study was conducted in a completely rand...