such aabiotic stresses like water stress are some of the most important threats to the production of agricultural crops. it is almost very rare to find a place with no stress where plants can reach their potential yield. a water stress of 17 percent decrease yield, due to its effect upon fruit setting is notable. therefore, a study was conducted in bushehr agricultural research center (located ...

two series (a and b) of n- substituted heteroaromatic compounds related to clotrimazole were synthesized. imidazole ring of the clotrimazole was replaced by 2-methylimidazole in series a, and by 2-methyl-4-nitroimidazole in series b. o-cholortrityl moiety of clotrimazole was also replaced by trityl, mono or dimethoxy trityl. chemical structures of all the new compounds were confirmed by spec-tr...

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the present paper is concerned with the structural characteristics and contents of the russian resistance poets from the outset up to the end of the world war ii, 1941-1945. regarding the linguistic and literary structures of the resistance poetry of this period, such features as changes in the lexical structure of poems, outspokenness, proximity of poetry to slogans can be easily observed. sem...

the kinetics of the reactions between triphenylphosphine 1 and dialkyl acetylenedicarboxylates 2, in the presence of a nh-acid such as 5-nitroindazole 3,were studied. corresponding kinetic parameters to all reactions were evaluated, with the second order rate constant (k) values calculated. effects of solvent, temperature, and reactants (dialkyl acetylenedicarboxylates) structure and concentrat...

the complexation reactions of some transition metal ions and 2-aminopyridine (2-ampy) were studied potentiometrically in aqueous solution at µ=0.1 m and 25 °c. the overall stability constants log β’s of all species are obtained by computer refinement of ph-volume data with using the best computer program. several models were tested and the best one accepted according to the least sum of squared...

this study was conducted to determine water stress tolerance of two iranian dudaim melons (kerman & birjand) and one iranian muskmelon (samsoury). throughout the experiment, three different levels of irrigation with three irrigation starting points (-50, -65 and -75 cb of matric potential) were employed. results indicated that water stress significantly affected yield, firmness, fruit sugars as...

introductionkalat dam and hydropower plant, which is in maroon river basin, kohgiluyeh and boyer-ahmad province is situated in the southwest of iran. in this research, in order to select the optimum alternative to this project, with due emphasis on the environmental criterions, three alternatives, namely, kalat, sarkooh, and zirna, are investigated. this plan encompasses the objectives of secur...

a m i t r a z, a n i ns e c t i c i d e /a ca ri c i de of the f o r m a m i d i n e p e st i c i d e s group, is a ? 2 a d r e n e r g i c ag on i st a nd of t he a m i d i ne c h e m i ca l f a m il y generally us e d to c o n t r ol animal e c top a r a s i t e s. poisoning due to am i t r a z i s r a r e and characterized by c e nt r a l n e r v ous s y st e m a nd r e sp ir a to r y d e p ...

the extensive use of pesticides in agriculture is compromising soil and water quality. one major concern is protecting water resources from contamination. the main objective of this research was measuring 2,4- d in a silty clay soil and simulating temporal transportation of this herbicide in soil using a leachp model, in a corn root zone field. 2,4- d was applied at 3.5 kg a.i./ha, followed by ...