26,887 Result(s)
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Chapter and Conference Paper
Investigation on Ecological Distribution of Fungi in Paddy Soils
Paddy soils are derived from various kinds of parent materials under wet cultivation over different parts of China. They developed through repeated and alternate processes of oxidation and reduction. They are ...
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Chapter and Conference Paper
Influence of Transformation of Iron Oxides on Soil Structure
Although iron oxides in soils are the secondary component of soil clay, they have attracted the attention of many soil chemists. This is because iron oxides are highly active, are easily changed with a change ...
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Chapter
Preparation of Nuclear Targets at the Institute of Atomic Energy
In this paper, the development of nuclear targets for nuclear reaction experiments in the Institute of Atomic Energy, Peking, China, is described. The techniques of vacuum evaporation, electroplating and isoto...
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Chapter and Conference Paper
The Effect of Water-Stable Aggregates in Various Sizes on Air and Water Regime of Soils
Studies in recent years indicate that some of the paddy soils in the Taihu Lake region have become degenerated in structure owing to the management practice unadaptable for the current triple crop** system w...
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Chapter and Conference Paper
Crop** System in Relation to Fertility of Paddy Soils in China
China has a long history of rice cultivation. It is demonstrated that rice has been cultivated for more than five thousand years in the country. Following the social development and scientific and technologica...
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Chapter and Conference Paper
Differentiation of Iron Oxide in Paddy Soils in Taihu Lake Region
In the genesis of paddy soils the differentiation of iron oxid is one of the main causes for forming specific morphological profiles. In this paper, based on the contents of total iron, free iron oxide and amo...
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Chapter and Conference Paper
Clay Minerals of Paddy Soils in Taihu Lake Region
The Taihu Lake is situated in the northern part of subtropics, with a mild and humid climate. According to the results of primary mineral analysis(l), the minerals in the silt fractions are less weathered with...
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Chapter and Conference Paper
Some new developments of the singularity-separating difference method
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Chapter
A Study of the Reaction Mechanism for 12C Plus 209Bi at E(C) = 61.1-73 MeV
Elastic, evaporation-residue, fission, and light-particle cross section excitation functions have been measured for 12C + 209Bi at incident energies near and just above the Coulomb barrier. From these data a “dir...
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Chapter and Conference Paper
Intracranial Hemorrhage and Hematoma Following Open-Heart Surgery
Neurological damage following open heart surgery has been a subject of much concern ever since the employment of cardiopulmonary bypass in cardiac operations. Various lesions including cerebral edema, petechia...
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Chapter and Conference Paper
Experimental Investigation of Prism-Grating Couplers
We have proposed and produced a novel structure, so-called “prism-grating” coupler, to excite guided modes in film waveguide by an incident beam of laser. The coupler is a composite structure consisting of a p...
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Chapter
An Experimental Investigation on the Sound Speed and “Choking” Phenomenon of Gas-Liquid Two-Phase Flow in the Electrochemical Machining (ECM) Gap
The flow through electrochemical machining (ECM) gap is a gas-liquid two-phase flow (GLF). The investigation on it has important significance for mastering the ECM sha** law and raising the ECM accuracy.
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Chapter
Transposable Elements in Archaebacteria
In 1977, Woese, Fox and collaborators (1–3) asserted that the prokaryotes harbored within themselves an evolutionary discontinuity as profound as that which separates prokaryotes from eukaryotes (4). On one side ...
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Chapter
Study on the Carcinogenecity of γ-Benzene-Hexachloride in Rats
Four groups of Wistar rats, each consisting of 20 of both sexes were tested for carcinogenic potential at dose levels of 0 (negative control), 5, 25, and 125 ppm of pure γ-BHC (99.9% purity, determined by gas ...
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Chapter
Cytotoxicity and Induction of Sister Chromatid Exchanges (SCE) In Vitro by Several Antitumor Drugs
This paper summarizes our results on tests of cytotoxicity and the induction of SCE in V79 Chinese hamster cell line treated with the following antitumor drugs: camptothecin (CPT), hydroxycamptothecin (HCPT), ...
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Chapter
Effects of Several Kinds of Radiosensitizers on γ-Ray-Induced DNA Single Strand Breaks and their Rejoining in Mammalian Cells
By means of improved membrane filtration methods the effects of six kinds of radiosensitizers on γ-ray-induced DNA single strand breaks and their rejoining in Chinese hamster ovary cells were compared. It was ...
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Chapter
Mutagenicity and Teratogenicity of the Fungicide Ethyl Disulfide
Ethyl disulfide is an organophosphorus fungicide with the chemical name bis-(0,0-diethylphosphinothioyl)-disulfide. A battery of tests was carried out in an attempt to evaluate its mutagenicity and teratogenic...
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Chapter
Study of the Disproportionation of Sodium Thiosulfate by X-Ray Photoelectron Spectroscopy
The disproportionation of sodium thiosulfate to form sodium sulfite and elemental sulfur has been studied in the temperature range 495–548°K by means of X-ray photoelectron spectroscopy (XPS). The disproportio...
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Chapter
Two Simplified Models and Their Application to Performance Study of Mixing Gasdynamic Lasers
Two simplified models, Gradually Mixing Model (GMM) and Instantaneously Mixing Model (IMM), have been used to study the performance of CO2 mixing gasdynamic lasers (MGDL). The relaxation rates and, more important...
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Chapter
The Dynamics of Millisecond Delayed Light Emission and Its Relation with Photophosphorylation
Since the discovery (Mayne, 1966) of the phenomenon that the millisecond delayed light emission (ms-DLE) was closely related to the high energy state of photophosphorylation (PSP), many works have been done to...
