Bloom and Bust: ecological consequences of precipitation variability in aridlands

Ecological Consequences of Extinction Ecological Consequences of Extinction

Ecological consequences of variation in precipitation: separating short versus longterm effects using satellite data

Aim Precipitation controls the production of semi-arid plants through various mechanisms that operate at a range of time-scales. Short-term variation in precipitation affects vegetation through adjustments in plant physiology and leaf phenology, whereas long-term effects are mediated by plant establishment and mortality, community composition and disturbance regimes. Our goal is to use remote s...

Assessment of Spatial and Temporal Variability of Extreme Precipitation Indices (North and West of Iran)

The frequency of precipitation extreme event can cause flood or change the drought period. Accurate understanding of these changes is necessary to take action to reduce these effects. In this research, temporal and spatial changes of 14 precipitation indices for eight synoptic stations in the North and West of the country were investigated. For this purpose, after reconstructing the daily preci...

synthesis of sulfides from alcohols and thiols in solvent-freeconditions and deoxygenation of sulfoxides

کاتالیست یک سنتز جدید برای تیواترها توصیف شده است. واکنش الکل ها با آریل، هتروآریل و آلکیل تیو ل ها درحضور 1،3،5- تری آزو- 2،4،6- تری فسفرین-2،2،4،4،6،6 هگزاکلراید ((tapc به عنوان یک کاتالیست موُثر، بازده های خوب تا عالی از تیواترها را حاصل می کند. علاوه براین، واکنش تحت شرایط بدون فلز و بدون حلال پیش می رود، بنابراین یک مکمل جالب برای روش های شناخته شده سنتز تیواترها ارائه می دهد. یک مکانیسم ا...

Investigation of Phytochemical Variability, Antioxidant Activity and Ecological Conditions of Native Iranian Glycyrrhiza glabra L.

Licorice (Glycyrrhiza glabra L.) as a strategic and highly valuable medicinal plant in Iran with numerous beneficial pharmaceutical properties contributes substantially to Iranian herbs exports. In the present study, a variation on the phytochemical and antioxidant activity of 25 populations of valuable and profitable medicinal plant of G. glabra was investigated. The climate variables and soil...