منابع مشابه
persian gulf oil and us national security
vital importance of the energy in national and international economic development has made oil as a crucial and attractive factor for great powers. these powers have had permanent competition for establishing an oil system for securing their national interests. the persian gulf has been focal point of these competitions. after september 11, 2001, the role of oil has considered as one of the mos...
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Based on the floristic study of rust fungus flora (Uredinales) ofGolestan National Park, located in the Northeast of Iran, 68 rust taxa were recognized. Of these, one subspecies and five species viz. Phragmidium sanguisorbae subsp. mediterraneum on Sanguiosorba minor, Puccinia difformis on Galium aparine, P. jasmini on Jasminum fruticans, P. rhylismoides on Thalictrum isopyroides, Uromyces mogi...
متن کاملFINE GREENS and FAIRWAYS
mowing. It is run along the ground on one large wheel which is f ree of the motor operat ing the cutter bar. I t can be tilted to cut up or down slopes and can be pivoted sharply in any direction. It has been found part icularly valuable for cutting around trees, boulders, t raps, creek-bottoms, and other golf course obstructions which formerly required hand cutt ing. The motor scythe, powered ...
متن کاملPolio eradication: 7 countries and US$ 210 million to go.
The World Health Organization launched a final push on 29 July to eradicate polio by 2005 with a call to donors for an additional US$ 210 million to finally stamp out the incurable laming disease that mainly affects under-five-year-olds. WHO’s DirectorGeneral Jong-Wook Lee has appointed David Heymann as his representative on polio eradication following the infectious diseases expert’s success h...
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ژورنال
عنوان ژورنال: Nature
سال: 1991
ISSN: 0028-0836,1476-4687
DOI: 10.1038/352750c0