نتایج جستجو برای: roots

تعداد نتایج: 61009  

Journal: :Journal of Epidemiology & Community Health 2002

Journal: :Theatre Research in Canada 2020

Journal: :Archives of Psychiatry Research 2019

Journal: :AI & society 2023

Journal: :Math. Comput. 2006
Susumu Tanabé Michael N. Vrahatis

A problem concerning the perturbation of roots of a system of homogeneous algebraic equations is investigated. The question of conservation and decomposition of a multiple root into simple roots are discussed. The main theorem on the conservation of the number of roots of a deformed (not necessarily homogeneous) algebraic system is proved by making use of a homotopy connecting initial roots of ...

Journal: :Tree physiology 2004
Christoph Leuschner Heinz Coners Regina Icke

The spatial heterogeneity of water uptake by fine roots under field conditions was analyzed in situ with miniature sap flow gauges in a mature beech-oak-spruce mixed stand. Sap flow rate (J), sap flow density (Jd), and root surface-area-specific flow rate (uptake rate, Js) were measured for eight to 10 small-diameter roots (3-4 mm) per species in the organic layer (superficial roots) and in the...

2009
Graziana Taramino Mai Komatsu Frank Hochholdinger Hajime Sakai

In order to stand firmly and efficiently uptake water and nutrients, plants need complex root stock architectures. The root system in maize is characterized by different root types, each of which contributes to the development and establishment of plants in a distinctive manner. During very early development, the embryonic primary and seminal roots are predominant, together with their post-embr...

Journal: :Functiones et Approximatio Commentarii Mathematici 2013

Journal: :South African Journal of Science 2010

Journal: :Botanical Gazette 1911

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