Nutrition diagnosis is an applied technology concerned nutrition of seedling and soil chemistry, it is a method through technology of biology and chemistry for analyzing the abundant or insufficient of nutrition in course of the growth of seedling. Scientific judgement for guiding fertilization will be drawn through diagnosis.
According to the purpose and task of coal structural chemistry, it can be divided into two parts, i.e.experimental coal structural chemistry, computing coal structural chemistry.
From the point of view of surface chemistry, it analyzed the similarities and differences of the bonding technology between butt-welding and lap-welding of Al/plastic composite pipes , discussed the bonding mechanisms and bonding technology of butt-welding Al/plastic composite pipes, and also pointed out the problems existed in bonding technology.
The Hartree-Fock method and density functional theory (B3LYP method) at the 6-31G(d) basis set level were used to determine the molecular geometrical parameters and hydrogen bonding energies of oxo form (Py) and hydroxy form (Hy) tautomers of 2-hydroxy pyridine, dimers and hydrated complexes.
This peper analyse the changeable rule of oxidizing power of oxyacids (N,S,Cl) with the electronic structure data by ab initio and MNDO calculation on the basis of standard electrode potential E°
A quantity of scientific publications steadily grows from year to year, this implyies that the QSRR enormous advantage and potential in chemistry, biology, and pharmacology.
Based on the polymer and plastic analogy, the annual market for products that carry nano-components, including all computer chips, half of pharmaceuticals and half of chemical catalysts, will reach $1 trillion by 2015.
The structural information of the glucan was achieved by chemical (hydrolysis, methylation, periodate oxidation) and spectroscopic (1H and 13C) analyses, indicated a repeating unit built up of (1→6)-linked D-glucose.
Since the whole perception of the properties and laws of the material world are so strongly dependent on the level of performance of Analytical Chemistry it has become a self-reliant, chemical subdiscipline.
For detailed modeling of atmospheric chemistry it is necessary to consider aqueous-phase reactions in cloud droplets and deliquesced aerosol particles.
The thermodynamic functions of an ideal subetance represented by van der Waals equation are obtained with the help of the condition that these functions reduce to those of a perfect gas in the limiting case of vanisning prassure. The volumes of the liquid state and gas state in coexistence as determined by Maxwell's rule of equal areas are expressed in a parametrie form. The nature of the dependence of the constants a and b on the chemical composition of the gas is briefly considered.
General formulas for the. critical temperature and the discontinuity of the ipecific heat of a, superlattice are obtained by the generalized quasi-chemical method, The results may be applied to any approximation.
The generalization of the quasi-chemical method of Fowler and Guggenheim in the statistical theory of superlattices made by one of the authors is extended to a binary alloy of any composition. The formulae are very similar to those for the composition 1:1. The alloy AuCu3 is treated in more detail.
化学的
chemistry
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