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تعداد نتایج: 13958118 فیلتر نتایج به سال:
Triphenylchloromethane (TPCM) is reduced by zinc in a benzene solution, giving an intense yellow solution of triphenylmethyl (TPM), the first known stable free radical. In the solution, the free radical is in equilibrium with the dimer – 3-diphenylmethylidene-6-triphenylmethylcyclohexa-1,4-diene. The reactivity of TPM is demonstrated in reactions with oxygen and iodine, using a purpose built re...
Matang Mangrove Forest Reserve (MMFR) in Peninsular Malaysia is under systematic management since 1902 and still considered as the best managed mangrove forest in the world. The present study on silvimetrics assessed the ongoing MMFR forest management, which includes a first thinning after 15 years, a second thinning after 20 years and clear-felling of 30-year old forest blocks, for its efficie...
abstract this study evaluated and compared medical terminology and english for the students of medicine (ii) as two representatives of the textbooks available on the iranian market for teaching english to the students of medicine. this research was performed on the basis of a teacher’s and a number of students’ attitudes and the students’ needs analysis for two reasons: first, to investigate...
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