نتایج جستجو برای: sap flux density

تعداد نتایج: 494422  

Journal: :Tree physiology 2002
B Köstner E Falge J D Tenhunen

Stand age is an important structural determinant of canopy transpiration (E(c)) and carbon gain. Another more functional parameter of forest structure is the leaf area/sapwood area relationship, A(L)/A(S), which changes with site conditions and has been used to estimate leaf area index of forest canopies. The interpretation of age-related changes in A(L)/A(S) and the question of how A(L)/A(S) i...

2013
H. J. Schenk S. Espino A. N. Mendez A. J. McElrone

Sap flow in plants takes place in the xylem, a hydraulic system that is usually under negative pressure and in which gas and liquid phases are separated by nanoporous, fibrous pit membranes. It has long been known that this system is at risk of drawing gas nanobubbles through these membranes into the xylem sap, a process referred to as “air seeding”. These bubbles then can cavitate and create e...

2010
Yu Guo Han Pei Ling Yang Yuan Pei Luo Shu Mei Ren Li Xia Zhang Lei Xu

Drought is a great concern in agricultural production, because it restricts normal plant growth, brings about enormous economic loss and deteriorates ecological environment. Proper use of super absorbent polymers (SAP) is helpful in the agricultural and horticultural industry in arid and semi-arid areas, because SAP can ease the burden of water shortage. Because porosity is one of the most impo...

ژورنال: سنجش و ایمنی پرتو 2015

Biological effects of radiation are due to energy deposition arising from the alpha particles hits with cell nuclei. A simulation has been done to calculate the flux density of Radon progeny alpha particles induced from uniform inner surface source distributed in lung cylindrical airway using Monte Carlo method. Number of hits, transformation frequency and dose has been calculated using obtaine...

2018
Tengfei Yu Qi Feng Jianhua Si Patrick J Mitchell Michael A Forster Xiaoyou Zhang Chunyan Zhao

During the night, plant water loss can occur either through the roots, as hydraulic redistribution (HR), or through the leaves via the stoma, as nocturnal transpiration (En), which was methodologically difficult to separate from stem refilling (Re). While HR and En have been reported across a range of species, ecosystem, and climate zone, there is little understanding on the interactions betwee...

Journal: :Journal of economic entomology 2017
Larissa Guillén Ricardo Adaime Andrea Birke Olinda Velázquez Guillermo Angeles Fernando Ortega Eliel Ruíz Martín Aluja

We determined the influence of resin ducts, sap content, and fruit physicochemical features of four mango cultivars (Criollo, Manila, Ataulfo, and Tommy Atkins) on their susceptibility to the attack of the two most pestiferous fruit fly species infesting mangoes in Mexico: Anastrepha ludens (Loew) and Anastrepha obliqua (Macquart). We performed three studies: 1) analysis of resin ducts in mango...

Journal: Nanomedicine Journal 2015
Ali Jebali Farzaneh Haji Esmaeil Hajjar, Seyedhossein Hekmatimoghaddam

Objective(s): The aim of this study was to synthesize triangular gold nanoparticles, and then to evaluate their capability for inhibition of Candida albicans secreted aspartyl proteinase 2(Sap2).Materials and Methods: To synthesize the nanoparticles, hydrogen tetrachloroaurate and hexadecyl trimethyl ammonium bromide were incubated in presence of Sn(IV) meso-tetra(N-methyl-4-pyridyl) porphine t...

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