نتایج جستجو برای: protection of natural resources
تعداد نتایج: 21227798 فیلتر نتایج به سال:
The economic growth of aquaculture and the dependence of a large growing population on coastal resources have led to coastal degradation and reduced resources. In this paper while realizing the potential capacities of the island systems, the aquaculture activities of the island are specially discussed in the framework of Integrated Coastal Zone Management (ICZM). Therefore, in this study, fir...
Persian wild ass, Equus hemionus onager, is a rare subspecies of Asiatic wild ass endemic to Iran, which was historically widespread in arid and semi-arid steppes of central and southeastern Iran. Today only two natural populations have remained. This subspecies is listed as Critically Endangered in the Red List of the International :::union::: for the Conservation of Nature and Natural Resourc...
Follow this and additional works at: http://digitalscholarship.unlv.edu/water_pubs Part of the Biochemistry Commons, Biology Commons, Desert Ecology Commons, Environmental Health and Protection Commons, Environmental Indicators and Impact Assessment Commons, Environmental Monitoring Commons, Fresh Water Studies Commons, Natural Resource Economics Commons, Natural Resources Management and Policy...
Eng. Hadi Hosseini Araghi was born in 1943, in Arak, Iran, where he graduated from the high school of natural sciences. He received his B.Sc. degree in Agricultural Engineering from the University of Tehran. In 1969, he started his collaboration with the Range Organization in the form of preparing range management plans. He received his M.Sc. from the Arizona State University in 1976. Then, in ...
The genus Calendula belongs to tribe Calenduleae, (Asteraceae family). Itmorphologically studied for the ongoing project of the flora of Iran. Based on the herbarium studies and field observation, this genus has been revised. The study was based on fresh material from field as well as herbarium specimens. All specimens existed in the herbarium of Research Institute of...
this thesis basically deals with the well-known notion of the bear-invariant of groups, which is the generalization of the schur multiplier of groups. in chapter two, section 2.1, we present an explicit formula for the bear-invariant of a direct product of cyclic groups with respect to nc, c>1. also in section 2.2, we caculate the baer-invatiant of a nilpotent product of cyclic groups wuth resp...
Natural substances extracted from plants have recently been considered as potential sunscreen resources because of their ultraviolet ray absorption in the UVA region and their antioxidant activity. In the present study, the UV protective effects of ethyl acetate extracts of some common medicinal plants, which have flavonoids and other phenolics as the most important components, were evaluated u...
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