نتایج جستجو برای: pool

تعداد نتایج: 46896  

Journal: :مدیریت خاک و تولید پایدار 0
رضا کریمی دانشگاه شهرکرد محمدحسن صالحی دانشگاه شهرکرد زهره مصلح دانشگاه شهرکرد

this study was conducted to investigate the impact of land use change on some of carbon components in safashahr area, fars province. four land uses (destroyed rangeland, agricultural land, new and old apple orchard) were selected. sampling was done randomly from two depths (0-20 and 20-50 cm) of each land use. particulate organic matter (pom) and extractable carbohydrate by hot water were measu...

MA Moosavi R Yazdanparast

Today’s medical word is highly dependent on severel natural products (e.g. taxol) in fighting different kinds of cancer and in constantly working to found new compounds. In this respect, 3-hydrogenkwadaphnin is a new diterpene ester isolated from Dendrostellera lessertii (Thymelaceae). It has been previously shown that this new compound has high anti-tumor activity and the capability of arresti...

Nucleate boiling heat transfer coefficients may be strongly reduced by scale formation, even for conditions where the bulk foulant concentration is well below the saturation concentration. Due to the mechanism of micro-layer evaporation, the local concentration at the heat transfer surface can be considerably increased, causing the formation of scale and changes in bubble frequency and bubble d...

مکی‌زاده, محمدعلی, تقی‌پور, بتول , رضازاده, حمدالله , سال‌افزون, مریم ,

Qroqchy area is located northwest of Isfahan, in the central Iranian structural zone. The Nayband black shale is a significant geological unit which is widespread occurrences in the study are. Weathering process lead to black sale alteration and formation of acidic pool. The pool is located on the black shale basement. Around of the pool sulfate minerals occur with various colors. The aim of th...

2002
Jana Vyrastekova Daan van Soest

Unrestricted access to common-pool resources leads to individually rational extraction levels that are suboptimally high from a social perspective. In an experimental setting, we analyze to what extent local community participation can enhance the effectivity of a centralized enforcement institution aimed at decreasing aggregate extraction. We hypothesize that, by letting the resource users vot...

2013
Filippos Exadaktylos Antonio M. Espín Pablo Brañas-Garza

Experiments using economic games are becoming a major source for the study of human social behavior. These experiments are usually conducted with university students who voluntarily choose to participate. Across the natural and social sciences, there is some concern about how this "particular" subject pool may systematically produce biased results. Focusing on social preferences, this study emp...

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