نتایج جستجو برای: biological competition
تعداد نتایج: 545385 فیلتر نتایج به سال:
Competition - colonization tradeoffs occur in many systems, and theory predicts that they can strongly promote species coexistence. However, there is little empirical evidence that observed competition - colonization tradeoffs are strong enough to maintain diversity in natural systems. This is due in part to a mismatch between theoretical assumptions and biological reality in some systems. We t...
In order to study the tolerance mechanism of spring bread cultivars to wild oat competition, an experiment was conducted in research farm of Ramin Agricultural and Natural Resources University of Khouzestan as strip block with three replications during 2010-2011 growing season. Experimental factors were wild oat densities includ 0 (as control) and 80 plant/m2 as horizontal plots and ten wheat c...
The pharmaceutical industry plays an important role in every economy. Although pharmaceutical sector has distinctive economic features, like every other sector of the economy, the production and distribution of pharmaceuticals must obey competition law rules. The provisions regarding unilateral anticompetitive conduct such as discriminatory pricing, aggressive price setting, abusing a domina...
Fopius ceratitivorus Wharton is the most recently imported parasitoid for biological control of tephritid fruit flies in Hawaii. In this paper we summarize current progress on studies of this parasitoid under quarantine conditions in Hawaii. Tests on its potential target host range reveal that F. ceratitivorus attacks and completes its development only in the Mediterranean fruit fly, Ceratitis ...
This review describes and motivates six principles for computational cognitive neuroscience models: biological realism, distributed representations, inhibitory competition, bidirectional activation propagation, error-driven task learning, and Hebbian model learning. Although these principles are supported by a number of cognitive, computational and biological motivations, the prototypical neura...
Polar regions are remote and challenging areas on the earth. In view of the unique environment and the severe competition in polar regions, it's considered that the ecological system might be the producer of new compounds with diversity biological activities. This review is an attempt to consolidate the studies about 97 natural products isolated from Antarctic and Arctic organisms including mic...
The relationship between political competition, economic growth and oil revenues in Iran’s provinces
The literature of political economy emphasizes the role of political institutions in controlling the behavior of politicians and economic choices. Political institutions include the arrangements established in the ruling political structure such as elections, parliament, government, laws, etc, in which, the political competition is one of the most important descriptors of the mentioned structur...
abstract to evaluate the effect of different levels of nitrogen fertilizer on competitive ability of canola against wild mustard interference, a split plot trial based on a randomized complete block design with 3 replications was carried out. experimental treatment were amounts of nitrogen fertilizer of urea (46% nitrogen) in 4 levels (100, 150, 200 and 250 kgn/ha) and 5 wild mustard densities ...
stock market is run by special regulations. accordingly, analyzing the issues about the relation between the competition law and capital market such as stock market officials and their boundaries in the context of setting, controlling and enforcing rules, the generality or specificity of such rules, the controllability of stock market in comparison to the general competition rules and the stat...
there are many agreements for transferring technology, but license agreement is the most important agreement in this regard. according to the mentioned agreement, the owner of patent or technology as licensor grants the license to licensee in specific duration and in a given territory. exclusive rights of licensor and the objectives of competition law, including the welfare of consumers or prev...
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