Abstract To study the effect of water stress in rapeseed cultivars at the seedling stage, 10 rapeseed cultivars were evaluated at three irrigation levels [normal irrigation (control) and irrigation after depletion of 60 and 85% of available soil water]. Analysis of variance showed considerable variation among cultivars. Water stress reduced all of the studied morphological characteristics, espe...

ABSTRACT Molecular dynamics simulations were performed to investigate the stability with respect increasing simulated temperature from 300 2400 K of an isolated cluster composed 32 titanium atoms. The interatomic interactions modelled using Gupta potentials as implemented within classical molecular simulation software DL_POLY. radial distribution functions (RDF), diffusion coefficient, and dens...

in this research dft/b3lyp method has been employed to investigate the geometrical structures,relative stabilities, and electronic properties of cun (n=3–10) clusters for clarifying the effect of sizeon the properties. through a careful analysis of the successive binding energies, second-orderdifference of energy and the highest occupied-lowest unoccupied molecular orbital energy gaps as afunct...

The main goal of this thesis is to investigate the physical conditions of the star-forming environment in stellar clusters, especially · for the formation of low-mass cluster members. Embedded, young, and intermediate~mass stellar . clusters around Herbig . Ae/Be stars are sampled. Midand near-infrared observations identifying young stars and millimeter I interferometric observations probing de...

We have carried out ab initio molecular-dynamics studies on hydroperoxyl water clusters. Our studies are complemented by optimization, frequency, and excited-state calculations. The three main results we obtained are (a) the dynamically averaged energy gap between the highest-occupied molecular orbital and the lowest-unoccupied molecular orbital monotonically decreases as the number of water mo...

Results from previous laboratory experiments indicate that both the protonated water dimer H3O(H2O), and molecular cluster-ions, X(H2O)n absorb infra-red (IR) radiation in the water vapour continuum region between 4-14μm (2500-714cm). Protonated water clusters are a common species of atmospheric molecular cluster-ion, produced by cosmic rays throughout the troposphere and stratosphere. Under cl...

Powdery mildew caused by Erysiphe necator, is one of the most economically damaging diseases of grapevine throughout the world. This is the first molecular biology study on this fungus in Iran. The aims of the present study were (a) to analyse genetic diversity between isolates of E. necator fungus in four main grape production regions in Iran, i. e., Qazvin, Alamoot, Takestan and Shahriar and ...

Drought is one of the most important factors limiting crop yields around the world. Drought stress in plants, the change (increase or decrease) in the production of plant proteins. This research was carried out using bread wheat genotypes. For evaluation of leaf protein pattern in wheat, 10 genotypes were assayed with 3 replications under irrigated (non-stress) and rain-fed (stress) conditions....

Molecular dynamics simulations are performed to investigate the chemical products of molecular ethylene-cluster beam deposition on diamond substrates at room temperature. The substrates are hydrogen-terminated diamond ~111! surfaces of varying sizes. The computational approach is molecular dynamics simulations with two different methods for determining the forces on the atoms: an empirical reac...