منابع مشابه
The Study of Interactions between Active Compounds of Coffee and Willow (Salix sp.) Bark Water Extract
Coffee and willow are known as valuable sources of biologically active phytochemicals such as chlorogenic acid, caffeine, and salicin. The aim of the study was to determine the interactions between the active compounds contained in water extracts from coffee and bark of willow (Salix purpurea and Salix myrsinifolia). Raw materials and their mixtures were characterized by multidirectional antiox...
متن کاملSeasonal changes of metals in willow (Salix sp.) stands for phytoremediation on dredged sediment.
Fast growing biomass plants such as Salix species are promising for use in phytoremediation of contaminated land. This study assessed the seasonal variations and changes with stand age in metal concentrations of S. fragilis L. and S. triandra L. grown in field conditions on contaminated dredged sediment substrates with comparable properties. A lesser proportion of total soil Cd was extractable ...
متن کاملThe Modified Willow Tree Algorithm ∗
We develop a modified willow tree algorithm for option pricing. Our numerical results show that it approximates the true prices more quickly and precisely than the binomial tree, especially in d-factor models for d = 2, 3, 4, 5. A bound on the theoretical rate of convergence of the modified willow tree algorithm is established.
متن کاملSalix × meyeriana (= Salix pentandra × S. euxina)―a forgotten willow in Eastern North America
Salix pentandra L. is a boreal species native to Europe and western Siberia. In North America it is considered to have been introduced to about half of the US states (Argus 2007, 2010). In Massachusetts it is reported from nine of the fourteen counties (Sorrie & Somers 1999). Even though this plant may have been introduced to the US and Canada, its naturalization in North America appears to be ...
متن کاملPolymorphism and Divergence in Two Willow Species, Salix viminalis L. and Salix schwerinii E. Wolf
We investigated species divergence, present and past gene flow, levels of nucleotide polymorphism, and linkage disequilibrium in two willows from the plant genus Salix. Salix belongs together with Populus to the Salicaceae family; however, most population genetic studies of Salicaceae have been performed in Populus, the model genus in forest biology. Here we present a study on two closely relat...
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ژورنال
عنوان ژورنال: Nature
سال: 1944
ISSN: 0028-0836,1476-4687
DOI: 10.1038/154835a0