abstract to optimal use of available water, irrigation scheduling is important to over scarcity of water resources in arid and semi-arid area. in this research to estimate of maximum allowable deficit (or: management allowed depletion) and irrigation scheduling of fodder mays based on canopy-air temperature difference, a field study was conducted in agricultural faculty of karaj. the lower limi...

The cumulative reaction probability ~CRP! has been calculated for the H21OH↔H2O1H in its full dimensionality by using the centrifugal sudden ~CS! approximation for J.0. The Boltzmann average of the CRP provides the most accurate thermal rate constant to date for the title reaction on the Walch, Dunning, Schatz, Elgersma ~WDSE! potential energy surface ~PES!. It is found that the theoretical rat...

Aims. Using a newly determined 5D potential energy surface for H2–H2O we provide an extended and revised set of rate coefficients for de-excitation of the lowest 10 paraand 10 orthorotational levels of H2O by collisions with para-( j = 0) and ortho-H2( j = 1), for kinetic temperatures from 5 K to 20 K. Methods. Our close coupling scattering calculations involve a slightly improved set of couple...

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In this study, solid-state fermentation of two types of agricultural residues/products for lipase production in a tray-bioreactor was investigated. Rhizopus oryzae was used as a potential fungus strain and two types of agricultural residues including soybean meal and sugarcane bagasse were utilized as substrate. Fermentation was carried out in two different operational conditions: one with cont...

See article by Saitongdee et al. [1] (pages 108 –115) in 2. Conduction at low temperature this issue. Cardiac action potential propagation depends on the combination of action potential upstroke velocity and electrical cell-to-cell communication via gap junctions.

The reaction between the radical and the stable hydrocarbon is one of the simplest 2 22 neutral-neutral hydrocarbon reactions in chemical models of dense interstellar clouds and carbon-rich circumstellar shells. Although known to be rapid at temperatures o300 K, the reaction has yet to be studied at lower temperatures. We present here ab initio calculations of the potential surface for this rea...

We explore the effects of thermostats in replica exchange molecular dynamics (REMD) simulations. For thermostats that do not produce a canonical ensemble, REMD simulations are found to distort the configuration-space distributions. For bulk water, we find small deviations of the average potential energies, the buildup of tails in the potential energy distributions, and artificial correlations b...

Reactive collisions between O(-) and H2 have been studied experimentally at temperatures ranging from 10 K to 300 K using a cryogenic radiofrequency 22-pole ion trap. The rate coefficients for associative detachment, leading to H2O + e(-), increase with decreasing temperature and reach a flat maximum of 1.8 × 10(-9) cm(3) s(-1) at temperatures between 20 K and 80 K. There, the overall reaction ...

In order to study the thermodynamic properties of brane-antibrane systems, we compute the finite temperature effective potential of tachyon T in this system on the basis of boundary string field theory. At low temperature, the minimum of the potential shifts towards T = 0 as the temperature increases. In the D9-D9 case, the sign of the coefficient of |T |2 term of the potential changes slightly...