to assess nickel-induced toxicity in plants, zea mays seeds were germinated and cultured on nutrient solution with nickel concentrations of 0, 50, 100 and 200 μm for a period of two weeks. its effects on the growth, hill reaction and photosynthetic pigments content were then investigated. the fresh and dry weight of leaves and roots increased in 50 μm nickel, but decreased in 100 and 200 μm. th...

the reaction of ch₃nh₂ with o₂ on the singlet potential energy surfaces (pes) was carried out using the b3lyp, ccsd(t) and g3b3 theoretical approaches along with 6-311++g(3df,3pd) basis set. the suggested mechanism for the title reaction consists of one pre-reactive complex. from the pre-reactive complex, nine types of products, ch2nh+h2o2, ch3nh+ooh, nh2cho+h2o, ch2nho+h2o, nh3+hcooh, ch2nh+h2...

desmoplastic fibroma is a rare, locally aggressive, benign lesion. a case of desmoplastic fibroma of left side of mandible is reported. the lesion presented as painless mass in left posterior portion of mandible of a 7-year-old girl. histologically the lesion was composed of interlacing fascicles of benign appearing fibroblast in a varying ground substance of collagenous tissue. in this report,...

this is a study of depressive features in 51 iranian combatants suffering from ptsd. dsm iii-r considers depressive symptoms as associated clinical features of this condition. dsm iii and dsm iii-r both accepted the strong evidence that ptsd is a form of anxiety and included it in the anxiety disorders category. it is true that many ptsd sufferers present with anxiety features similar to these ...

Singular limit problems of reaction-diffusion systems have been studied in cases where the effects reaction terms are very large compared with those other terms. Such appear literature various fields such as chemistry, ecology, biology, geology and approximation theory. In this paper, we deal singular a general system including many literature. We formulate problem,...