نتایج جستجو برای: o13
تعداد نتایج: 336 فیلتر نتایج به سال:
لطفاً به چکیده انگلیسی مراجعه شود.
This paper examines how robust economic, political, and demographic variables are related to water and air pollution. Employing Bayesian Averaging of Classical Estimates (BACE) for a cross section of up to 74 countries, 33 variables and 3 proxies for air and water pollution over a period from 1980 to 1995 we confirm the Environmental Kuznets Curve hypothesis, highlight the relevance of efficien...
Seven pyrrolizidine alkaloids (PAs) have been isolated from Lithospermum canescens and their structures determined by spectroscopical methods. Besides the known lycopsamine, O7-acetyl-lycopsamine and O7-acetylintermedine four new PAs were found. Their structures are O7-(3-hydroxy-3-methyl-butanoyl)-O9-(+)-trachelanthoyl-heliotridine (= O7-(3-hydroxy-3-methyl-butanoyl)-rinderine = canescine), O7...
Connecting private dwellings to the water main is expensive and typically cannot be publicly financed. We show that households’ willingness to pay for a private connection is high when it can be purchased on credit, not because a connection improves health but because it increases the time available for leisure and reduces interand intra-household conflicts on water matters, leading to sustaine...
We explore heat-related labor impacts both for their own interest and to understand the role of adaptation in responding to climate change. Focusing on non-agricultural sectors in the United States, we find that hot temperatures exert a causal negative impact on county-level payroll – reducing payroll by several percentage points in a 2◦C hotter year – with larger impacts in highly exposed indu...
نمودار تعداد نتایج جستجو در هر سال
با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید