the research was carried out to study the effect of provenance variation on stem length, stem biomass, root biomass and survival ofcaucasian oak (quercus macranthera) seedlings. the seeds were collected from several seed sources grown in an altitude range of 1800-2000 m a.s.l in alborz mountain, both from the northern facing slope, kordkoy and chichal, and from the southern facing slope, roudba...

BACKGROUND: The disease that is endemic and has become a global pandemic COVID-19 due to reports of thousands cases. weighing on intensive care units with an influx patients. clinical manifestations vary, diagnostic examinations treatment are also experiencing dynamic developments. This study aims provide overview the characteristics, manifestations, length treatment, nutritional status METHODS...