نتایج جستجو برای: ���hazin��� (desolate) and ���k��r��� (work)
تعداد نتایج: 16871147 فیلتر نتایج به سال:
It is necessary that ETr (Alfalfa-reference evapotranspiration) values be converted to ETo (Grass-reference evapotranspiration) or vice versa. The main objective of this study was to develop ETr to ETo ratios (Kr values) for a growing season in Shahrekord plain, Shahrekord, Iran. Mean monthly and total (growing season) values of Kr were calculated based on 185 daily ET data set in Chaharthakhte...
In order to investigate the gas separation ability of a column packed with nanozeolitic material, nano NaY zeolite was synthesized and granulated. These uniform granules packed in a chromatographic column were utilized for separation of Xe and Kr under various operating conditions. With regards to the response peaks obtained from trace injections of Xe and Kr into the column, the first and seco...
This paper is a continuation of earlier work by the author on the connection between the logic KR and projective geometry. It contains a simplified construction of KR model structures; as a consequence, it extends the previous results to a much more extensive class of projective spaces and the corresponding modular lattices.
chapter one is devoted to a moderate discussion on preliminaries, according to our requirements. chapter two which is based on our work in (24) is devoted introducting weighted semigroups (s, w), and studying some famous function spaces on them, especially the relations between go (s, w) and other function speces are invesigated. in fact this chapter is a complement to (32). one of the main fea...
Kr is supposed to be used to study the properties of the windowless gaseous tritium source of the experiment KATRIN. In this work we deduce the amount of Kr which is necessary to determine possible potential inhomogeneities via conversion-electron-line broadening. PACS: 29.30.Dn, 07.81.+a, 02.50.-r
using the gaussian 2003 software and mp2/ 6–311 ++ g** method for he: he, ne:ne andmp2/6-31g method for ar: ar, kr: kr and hf/sto-3g method for xe: xe, the optimizedinteraction energies between two like atoms of rare gases (he, ne, ar, kr and xe) as a functionof the distances between the centers of two considered atoms were evaluated and the resultswere interpreted according to the lennard – jo...
Hyperpolarized (hp) Kr (spin I = 9/2) is a promising gas-phase contrast agent that displays sensitivity to the surface chemistry, surface-to-volume ratio, and surface temperature of the surrounding environment. This proof-of-principle study demonstrates the feasibility of ex vivo hp Kr magnetic resonance imaging (MRI) of lungs using natural abundance krypton gas (11.5% Kr) and excised, but othe...
increasing academic and professional language demands around the world are not a deniable fact. the purpose of this study was to investigate english language needs and communication needs of the chemistry students at master and ph.d. levels at the iranian universities. in this research, different methods were used including un-structured interview, structured interview, and two sets of question...
Introduction: Because of its spin I = 9/2, the noble gas isotope Kr possesses a nuclear electric quadrupole moment that is a source for rapid relaxation. However, its surprisingly long gas-phase T1 times of up to several hundred seconds at ambient pressure allow for Kr hyperpolarization that is 3-4 orders of magnitude above the equilibrium polarization at 9.4 T field strength [1,2]. The quadrup...
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