71,572 Result(s)
within
Chapter
**u-**u Zhang
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Chapter
A Study of Particle Movement in a Gas-Fluidized Bed
A laser technique was developed for the purpose of investigating the movement of particles in a gas-fluidized bed and some noteworthy results were obtained.
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Chapter and Conference Paper
Effect of Long-Term Rice Cultivation on Some Properties of Soda Solonchaks at Qian Gorlos Irrigation Region of Jilin Province in China
The Qian Gorlos irrigation region is located at long. 124°10’-125°2’E and lat. 45°0’-45°8’N. The growth of rice on saline-alkali soils in this region has a very long history in China. This region is spread wid...
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Chapter and Conference Paper
A Report on the Saling-Sodic Soils of Baigezhuang and the Zinc Deficiency of Paddy Crop
Beigezhuang is located on Luanhe Delta of the Bohai Gulf, which belongs to the partly dry and partly wet monsoon belt. The parent materials of the soils are delta deposit and marine deposit, with a texture of ...
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Chapter and Conference Paper
Hydrologic Status of Paddy Fields During Rice-Growing Period
The hydrologic status of a paddy field reflects the liquid pressure of the moving soil water. Experiences in China show that the drainage condition of paddy field is one of the important factors affecting the ...
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Chapter and Conference Paper
Residual BHC in Paddy Soils and its Contamination to Rice
At present, hexachloro-cyclohexane (BHC) is still one of the dominant pesticides commonly used in China. Whether a long term application of BHC would lead to the contamination of soil and crop is still a probl...
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Chapter and Conference Paper
Effect of Rice Planting on Improvement and Utilization of Saline Soils in Tarim Basin
It has been proved in a long period of practice that the planting of rice is effective on the improvement of saline soils. This can be applied to the extremely arid areas in southern **njiang(l). Flooding in t...
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Chapter and Conference Paper
Characteristics of Nitrogen Mineralization of Paddy Soils and their Effect on the Efficiency of Nitrogen Fertilizer
As revealed by the papers published in recent years (l–4), the mineralization pattern of soil nitrogen during a rice growing season in combination with the total amount of soil nitrogen supply is an important ...
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Chapter and Conference Paper
A Two-Photon Laser
During the past decade, electronic two-photon transitions [1] have been observed and largely utilized in two-photon absorption of laser light by atoms and molecules. In particular, cancellation of the Doppler ...
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Chapter and Conference Paper
Photovoltaic Activities and its Applications in China
This paper presents the activities and applications in photovoltaics field in China. It contains the historical development, technology status, including the research and development of various types of silico...
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Chapter and Conference Paper
Changes in Clay Minerals in the Genesis of Paddy Soils
Paddy soil is derived from its parent soil after a long period of submergence and cultivation. What is the relationship between the caly minerals of paddy soil and that of its parent soil? Are there any change...
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Chapter and Conference Paper
Paddy Soils in Chengdu Plain and their Classification
Chengdu Plain is situated at the upper reaches of the Changjiang River in the subtropical zone, with a height of 450–750 m above the sea level and a gradient of 4‰. It covers an area of about 7500 square kilom...
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Chapter and Conference Paper
A Preliminary Study On Properties Of Organo-Mineral Complex Of Paddy Soils in Taihu Lake Region
Soil Structure is an important factor in determining soil fertility, and is closely related to the quantity and properties of the organo-mineral complex of the soil.
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Chapter and Conference Paper
Production of 7-Aminodesacetoxycephalosporanic Acid by Immobilized E. Coli Cells
7-Aminodesacetoxycephalosporanic acid (7-ADCA) is the nucleus of cephalosporins and can be converted to various useful semisynthetic cephalosporins. The conversion of 7-phenyl-acetamidode-sacetoxycephalosporan...
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Chapter
An Investigation on Metal Cutting Dynamics and Its Optimum Control Based on Modern Control Theory
On the basis of previous works, general problems of optimizing metal cutting process are further discussed. The prerequisite for the optimum control of the metal cutting process is to seek out the dynamic char...
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Chapter
The Study of Precision Bar Crop** Under Axial Load
Based on the experimental results, this paper analyses mainly the mechanisms of the precision bar crop** under axial load and presents new deformation models. The models are able to explain in a better way a...
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Chapter and Conference Paper
Effect of Polymerization on the Fluorescence Lifetime of Eosin in Water
It is known that the fluorescence lifetime and the quantum yield of some organic compound solutions decrease as the solution concentration increases and this phenomenon has been attributed to the interaction o...
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Chapter
Scanning Photoacoustic Microscopy and Detection of Subsurface Structure
A scanning photoacoustic microscopy with a surface imaging resolution of about 2µm has been established. Some images of the subsurface structure of metals and layered materials have been obtained by measuring ...
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Chapter and Conference Paper
Glucoamylase Covalently Coupled to Porous Glass
Glucoamylase from Asp. niger (A.S.3.4309) was obtained from the Wuxi Enzyme Factory in liquid form. It had an activity of about 1400 U/ml, where U represents 1 μmole of reducing sugar liberated from soluble starc...
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Chapter
Array Systems for Underwater Viewing by Acoustical Holography
Experiments on underwater viewing by acoustical holography at Wuhan Institute of Physics, Wuhan, China are described. Early experiments were conducted in an anechoic water tank with scanning linear arrays. The...
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Chapter
Ke-Shan Disease
A unique heart disease called Ke-Shan disease (named for the county in northeast China where it was first noted) was reported in China in the 1930s (Jilin Medical University, 1977a). Up to the present time, Ke...
