drought is one of the most important factors limiting crop yields around the world. drought stress in plants, the change (increase or decrease) in the production of plant proteins. this research was carried out using bread wheat genotypes. for evaluation of leaf protein pattern in wheat, 10 genotypes were assayed with 3 replications under irrigated (non-stress) and rain-fed (stress) conditions....

the chemistry of 2-oxo-1,2,3,4-tetrahydropyrimidines began to develop toward the end of 1893 year, when the first representatives of this class compounds were reported by p. biginelli. despite prior reports of several really effective catalytic and non-catalytic approaches towards biginelli-type products, an overwhelming number of new catalysts for the biginelli reaction have been recently publ...

in order to study the effects of post – anthesis heat stress on source of six wheat genotypes (vee/nac, chamran, s79-10, dez, fong and kaveer), two separate field experiments were conducted as delayed as against optimum sowing dates in ahvaz coditions. plants in delayed sowing date experienced heat stress at post-anthesis growth stage. as study of grain yield indicated that the highest and the ...

oilseed rape is economically affected by stem rot caused by sclerotinia sclerotiorum worldwide. glucosinolates arethe specific secondary metabolites of brassica plants that appear in different profiles of each species. their hydrolysisproducts have biocidal activity and may play a role in resistance against plant pathogenic fungi. the resistance ofoilseed rape (brassica napus) cultivars and two...

saline and drought stress conditions are the most important factors in yield reduction of crops in the world. breeding of cultivars with high tolerance to these stresses and satisfactory yielding are considerable. the aim of this study was to compare the means of selected generations in saline and drought stress conditions in order to calculate response to selection. in this study two populatio...

chilling is an important environmental stress that influences the yield and quality of many agricultural crops. different plants use different systems to endure this stress and minimize its effects. one of these systems is enzymatic reaction. to find out more about responses of different grapevine species and cultivars to the low temperature conditions, their enzymatic changes were evaluated in...

microwave assisted green synthesis of α, ά- bis (substituted- benzylidene) alkanones by the crossed- aldol condensation reaction of substituted aryl aldehydes with ketones in the presence of catalytic amount of nbcl5 in good to excellent yields. this reaction is carried out under solvent-free conditions. the results showed that aldehydes bearing electron–donating substituent's on phenyl-ring fa...

stress is a physiological reaction to the ever-increasing demands of life. after each stressful event, the body should be returned to a normal relaxed state. however, continuous stress of modern life sometimes put the subjects at risk of developing a range of diseases; from psychosomatic to anxiety disorders. stress management program gives a range of tools to reduce the impact of stress and pr...

In contrast to the substantial number of studies investigating the effects of stress on declarative memory, effects of stress on working memory have received less attention. We compared working memory (numerical n-back task with single digits) in 40 men exposed either to psychosocial stress (Trier Social Stress Test (TSST)) or a control condition. Task difficulty was varied using two conditions...