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Study on Seed Transmission of Sugarcane Mosaic Virus in Corn
Maize dwarf mosaic (MDM) disease is the most important widespread viral disease of maize in the world. It has caused serious epidemics in the Northern regions of China since 1990. It can cause up to 100% yield losses due to the use of suscep....
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Grasshopper Hazard Prediction GIS in the Region around Qinghai Lake
In this dissertation, a geographic information system (GIS) for grasshopper hazard prediction in the region around Qinghai Lake was constructed. The system can be used to predict the spatial location, intensity and time of grasshopper outbre....
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Study on Survival and Proliferation of Mouse Spermatogonia in Vitro
The maintenance and propagation of any mammalian species depend upon the production of male and female gametes and their union to form an embryo. The male gametes derive from spermatogonial stem cells in adult animals. A type A-single sperma....
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Studies on the Expression of HSPs in Tissues of the Stressed Cattle
Beef cattle are subjected to a variety of stresses, which can impact the efficiency of production and health of the animal at various stages of the production cycle. These stressors may involve the following: temperature extremes, nutritiona....
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The Evaluation of Choline and Its Utilization in Chicken Nutrition
Choline is an essential nutrient that is need to be added in mixed ration for POultry andswine. In contrast to any other vitamin, it has well recognized that adult animals arc able tosynthesize enough amount of choline to meet their Physio1o....
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Determination of the Large Virulence Plasmid pCP301 and the Quinolone Resistant Genes of Shigella Fle
Bacteria of Shigella spp are high contagious, severe hazardous and gram-negative facutative intracellular pathogens, responsible for Shigellosis which characterized by fever, abdominal cramping and scanty, loose stools containing blood and m....
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Relationship between Multi-Drug Resistance and Expression Level of AcrAB Efflux Pump in Escherichia C
AcrAB efflux pump plays a major role in the antibiotics resistance phenotype of Esherichia coli mulitiple antiobiotics resistance mutant.AcrAB-TolC system can efflux out an extraordinarily wide variety of antibiotics, chemotherapeutic agent,....
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Identification and Comparison of Neutralizing Epitopes of Structural Glycoprotein E2 & E～(rns) of C
Classical swine fever virus (CSFV), Bovine viral diarrhea virus (BVDV), and Border disease virus (BDV) are members of the pestivirus genus within the family of Flaviviridae. The viruses are structurally, antigenically, and genetically closel....
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High Expression of CSFV E2 Antigen in E.coli and the Preparation of the Expressed Protein
In order to gain high expression in E.coli the full CSFV E2 gene was modified by replacing its six rare codons with E.coli biased ones and then cloned into expressing vector pET-28(a). The resulted expression plasmid, referred as pETE2(SW) w....
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Display of CSF Virus E2 Antigen on the Surface of Bacteriophage T4 and Study on Its Immunogenicity
The T4 phage display is a newly developed system for displaying of exogenous peptides or protein domains by fusion expression on the T4 surface. In this system the displayed proteins maintain their relatively independent conformation and bio....
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Construction and Immunological Characterization of Recombinant Fowlpox Viruses Coexpressing NDV F Gen
A transfering vector was constructed by inserted NDV F gene and IBDV VPO gene, under the control of two synthetic promoters ATI P7. 5X20 which were conjugated at opposite direction inserted within the thymidine kinase (TK) gene of FPV 282E4....
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Development and Application of Nucleic Acid Vaccine for Cryptosporidium Parvum in Animals
The CP15,CP15/60 and CP23 on the sporozoites of Cryptoporidium parvum are major surface protein which are studied in the new pattern vaccine and developed a serologic detection method for cryptosporidiosis.In the experiment,prokaryotic and e....
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Immunity and Toxic Pathological Study of β-Adrenergic Agonist Clenbuterol
Clenbuterol (CL), one of the P -adrenergic agonists, has a powerful effect of promoting animal growth with increased accretion of skeletal muscle mass and decreased accretion of body fat. Thus, it is called a repartitioning agent, and also c....
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Studies on Creating Silkworm (Bombyx mori.L) Asexual Reproductive Lines and Its Hereditary Feature
Sexual reproduction of animals was wildIy distributed in nature and also was the main reproductiveway As an important economic insect, the reproductive way of silkworm was similar to other animals.Sexual reproduction provided variation for t....
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Effect of Transferring SAG_(12)-ipt and 3DN-iaaL into Cut Chrysanthemum Mediated by Agrobacterium Tum
The sales volume of cut chrysanthemum has been over 60% in the world market of cut flowers since 1950s, and the demands of the cut chrysanthemum have increased drastically all over the world. Therefore, the annual supply and circulation of t....
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Propagation Technologies and Cold-Resistant Improvement for Introduced Species of Euphorbia tirucalli
Euphorbia tirucalli, named rubber euphorbia, milk bush, is a species of Euphorbiaceae. It has multi-usage and multi-function. It has being used as traditional medicine in Africa and South Africa, as well as in some countries of Southeast Asi....
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Study on the Chemistry of Lipids and the Bioactive Constituents from Kandelia Candel of Mangrove
Mangroves are woody plant communities, growing in intertidal zone of tropical coast. With the effect of warm oceanic current and tide, some species can grow in subtropical zone, some in river estuary as well as coast and land area where seaw....
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The Biodiversity and Ecological Bases of Sustainable Control of Dendrolimus Punctatus by Beauveria Ba
In this dissertation, the biodiversity and ecological bases of sustainable control of Dendrolimus punctatus by Beauveria bassiana were studied. Twelve experimental plots (14hm2 each) treated inoculatively with B. bassiana at different doses....
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Study on Modern Supergenesis of Purple Mother Rock and Its Environmental Effect
Supergenesis is the earth's surface change of rock and mineral, which take place in weathering crust, earth biosphere and hydrosphere. The component of atmosphere and hydrosphere carries through material and energy exchange and geochemistry....
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Studies on Microwave Dielectric Behavior of Moist Salt Soil and Its Effect on Backscattering Coeffici
Today, Soil salinization is a global crucial issue. An estimated 9.5 X 108hm2 of land are affected by salinity and sodicity. It occupies 7.26% of the earth's terrain. The total area of salt-affected land in China is 1.0X108hm2. The large sca....
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On the Modeling of Canopy Covered Surface Soil Moisture Change Detection Using Multi-temporal Radar I
Monitoring soil moisture dynamics is very important for understanding soil-vegetation interactions in both space and time. The effects of the surface roughness and vegetation covers are well-understood problems in estimating soil moisture wi....
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Growth and Alkaline Phosphatase Activity of Arbuscular Mycorrhizal Fungi as Affected by P Supply
Arbuscular mycorrhiza! (AM) fungi exhibit low host specificity and form mutualistic associations with a wide range of host plant species over a wide range of environmental conditions. Some characteristics of AM fungi, including hyphal growth....
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Study on the Screening of High-Efficient Sinorhizobium Meliloti for Medicago Sativa L. Cultivars and
Alfalfa industry expand rapidly in China to meet the demand of modulating agricultural structure recently. The experience of legume production in the world indicated that inoculating rhizobia for legume was a key technique to increase its yi....
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Characteristics of Nutrient Cycling in the Rice-wheat Rotation System
Effect of continuous application of chemical and/or organic fertilizer on productivity and soil fertility, as well as nutrient (N, P, K) cycling and nutrient balance in rice-wheat cropping systems was studied by using field, pot, lysimeter e....
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Studies on Restoration of Wetland Ecosystem and Changes of Soil Carbon and Selenium in Ruoergai Plate
Wetland is called "the cradle of mankind'\ "a gene pool of living things" and "the kidney of nature " because of huge productiveness, ecological and environmental values. Wetland, forest and ocean are the three most important ecosystem on ea....
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A Study on the Mechanism of Mitigating Methane and Ingredient Benefits of No-tillage in Rice-duck Com
Based on the mutualistic symbiosis relationship of rice and duck, jointed with no-tillage technique, the new no-tillage system of raising duck in paddyfield was formed. In order to provide the scientific and theoretic foundation for ecologic....
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The Mechanism and Effects of Agro-pastoral System Coupling and System Contrary in the Northern Ecoton
Based on system coupling theory, this study examined the agricultural and pastoral production patterns of the households both in agricultural farming region and animal husbandry region. By calculating and analyzing the system coupling and sy....
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Relationship between PVY CP Gene Induced Resistance and Transgene Integration and Resistance Transmis
RNA-mediated resistance is an effective way to obtain virus resistant plants and has attracted many researchers' attention because of its advantage of high bio-safety and long duration. RNA-mediated virus resistance is known as pathogen-deri....
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The Effect of PVY～N-CP Segment Length and Structure on RNA-Mediated Virus Resistance
Potato virus Y (PVY) is one of the most important virus diseases of economic crops worldwide, causing serious yield losses every year. To date, we can say that it is the most potent and efficient strategy in genetic engineering of virus resi....
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Studies on Establishment of Rapid Detection Method for Several Plant Prokaryote Pathogens Using Real-
Bacteria and phytoplasma are important plant pathogens, some of them have not been found in china and are or should be regulated as quarantine organisms.Conventional methods for the categorization, detection and identification of bacteria ar....