نتایج جستجو برای: european black alder

تعداد نتایج: 328317  

Journal: :Soil systems 2022

Forest soil compaction caused by heavy machines can cause ecosystem degradation, reduced site productivity and increased greenhouse gas (GHG) emissions. Recent studies investigating the plant-mediated alleviation of with black alder showed promising results (Alnus glutinosa). This study aimed to measure recovery GHG fluxes on machine tracks without alders in North-East Switzerland. In 2008, two...

Journal: :جنگل و فرآورده های چوب 0
رضا اولادی دانشگاه تهران، گروه علوم و صنایع چوب و کاغذ، دکترای علوم و صنایع چوب و کاغذ سعیده نصیریانی گروه علوم و صنایع چوب و کاغذ دانشکده منابع طبیعی، دانشگاه تهران، کرج افشین دانه کار دانشیار، گروه مهندسی محیط زیست، دانشکده منابع طبیعی دانشگاه تهران، کرج کامبیز پورطهماسی دانشیار، گروه علوم و صنایع چوب و کاغذ، دانشکده منابع طبیعی دانشگاه تهران، کرج

although in the recent years, the effect of ground water level on radial growth of black alder has attacked attentions of scientist but to comprehensively interpret the results of such studies, we need to investigate the independent influence of climate on ring width and other wood anatomical features of this species. hence, in current study, the influence of climatic factors on the annual ring...

2018
Joseph E. Knelman Emily B. Graham Janet S. Prevéy Michael S. Robeson Patrick Kelly Eran Hood Steve K. Schmidt

Past research demonstrating the importance plant-microbe interactions as drivers of ecosystem succession has focused on how plants condition soil microbial communities, impacting subsequent plant performance and plant community assembly. These studies, however, largely treat microbial communities as a black box. In this study, we sought to examine how emblematic shifts from early successional A...

Journal: :iranian journal of management studies 2013
hamid shahbandarzadeh khodakaram salimifard reza moghdani

in this paper, the pricing of a european call option on the underlying asset is performed by using a monte carlo method, one of the powerful simulation methods, where the price development of the asset is simulated and value of the claim is computed in terms of an expected value. the proposed approach, applied in monte carlo simulation, is based on the black-scholes equation which generally def...

In this article we have applied a numerical finite difference method to solve the Black-Scholes European and American option pricing both presented by fractional differential equations in time and asset.

ژورنال: مواد پرانرژی 2016

The reversibility of the Diels-Alder reaction can be used advantageously in polyurethane materials to endow them with recyclable, thermally reversible properties and self-healing ability to expand their application range. In this paper, linear and crosslink polyurethanes based on HTPB, which exhibit thermal reversibility through Diels-Alder and retro Diels-Alder reactions, were prepared and cha...

Journal: :Energy Exploration & Exploitation 2008

2009
Arthur McKee

Riparian ecosystems play numerous and essential roles related to the quality and flow of water, and foodlhabitat for fish, and varieties of wildlife. Due to lateral and linear linkages throughout the landscape, these zones influence the integrity of the terrestrial as well as the entire aquatic-riverine ecosystem. Since Euro-American settlement in the West, the structure and condition of many r...

2000
O. Dilly F. Buscot C. Eschenbach K. Pritsch

This paper reviews investigations on interactions between soil microbiota, and plants during the interdisciplinary program ‘Ecosystem research in the Bornhöved Lake district’; it deals with processes associated with the rhizosphere at four agricultural, and forest ecosystems. Emphasis was placed on a black alder forest representing the interface between terrestrial and aquatic ecosystems. In th...

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