توجه: محتویات این صفحه به صورت خودکار پردازش شده و مقاله‌های نویسندگانی با تشابه اسمی، همگی در بخش یکسان نمایش داده می‌شوند.
۱Coincidence points of generalized multivalued (f,L)–almost F–contraction with applications
نویسنده(ها): ، ،
اطلاعات انتشار: Journal of Nonlinear Sciences and Applications، هشتم،شماره۶، ۲۰۱۵، سال
تعداد صفحات: ۱۶
Recently Abbas [M. Abbas, Coincidence points of multivalued f–almost nonexpansive mappings, Fixed Point Theory, 13 (1) (2012), 3{10] introduced the concept of f–almost contraction which generalizes the class of multivalued almost contraction mapping and obtained coincidence point results for this new class of mappings. We extend this notion to multivalued f–almost F–contraction mappings and prove the existence of coincidence points for such mappings. As a consequence, coincidence point results are obtained for generalized multivalued f–almost F–nonexpansive mappings which assume closed values only. Related common xed point theorems are also proved. In the last section, applications of our results in dynamic programming and integral equations to show the existence and uniqueness of solutions are obtained. We present some remarks to show that our results provide extension as well as substantial generalizations and improvements of several well known results in the existing comparable literature.

۲Fixed fuzzy points of generalized Geraghty type fuzzy mappings on complete metric spaces
نویسنده(ها): ،
اطلاعات انتشار: Iranian journal of fuzzy systems، دوازدهم،شماره۴(پياپي ۴۵)، Aug ۲۰۱۵، سال
تعداد صفحات: ۱۴
Generalized Geraghty type fuzzy mappings on complete metric spaces are introduced and a fixed point theorem that generalizes some recent comparable results for fuzzy mappings in contemporary literature is obtained. Example is provided to show the validity of obtained results over comparable classical results for fuzzy mappings in fixed point theory. As an application, existence of coincidence fuzzy points and common fixed fuzzy points for hybrid pair of single valued self mapping and a fuzzy mapping is also established.

۳Deteriorative Effects of Cadmium Stress on Antioxidant System and Cellular Structure in Germinating Seeds of Brassica napus L.
نویسنده(ها): ، ، ، ، ، ،
اطلاعات انتشار: Journal of Agricultural Science and Technology، هفدهم،شماره۱، ۲۰۱۵، سال
تعداد صفحات: ۱۲
Cadmium (Cd), known as a non–essential heavy metal, can cause oxidative stress in plants. In this study, an attempt was carried out to find out whether Cd–induced oxidative and microscopic changes could be observed in the early stage of seedling growth. Seeds of Brassica napus (cvs. Zheda 619 and ZS 758) were germinated in vitro at 0, 100, 200, 300, and 500 μM Cd concentrations in dark for 48 hours. Results showed that the higher concentration of Cd (500 μM) significantly reduced plant growth in both cultivars. However, Cd concentration in both cultivars increased linearly with the Cd concentration, but was more pronounced in ZS 758 than the other cultivar. Moreover, Cd caused oxidative stress in germinated seeds by increasing reactive oxygen species, however, no relationship was found between antioxidative defense capacity including catalase, peroxidase, superoxide dismutase and glutathione reductase activities and Cd tolerance in the two cultivars. Cd toxicity showed significant ultrastructural changes in germinated seed cells, but cell structure in Zheda 619 did not show any difference, while cell structure in ZS 758 was totally damaged under higher concentration of Cd (500 μM). Based on the present findings, it can be concluded that cultivar Zheda 619 showed comparatively higher tolerance and integrity of cell organelles under Cd stress.
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