نتایج جستجو برای: o13

تعداد نتایج: 336  

لطفاً به چکیده انگلیسی مراجعه شود.

2006
Michael Lamla Michael J. Lamla

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...

Journal: :Zeitschrift fur Naturforschung. C, Journal of biosciences 2003
Helmut Wiedenfeld Agnieszka Pietrosiuk Miroslava Furmanowa Erhard Roeder

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...

2010
Florencia Devoto Esther Duflo Pascaline Dupas William Parienté

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...

2017
A. Patrick Behrer Jisung Park

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...

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