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农林牧渔 : 学术学位
Expression of the spike protein and its S1 subunit of infectious bronchitis virus using three expression systems.
Infectious bronchitis is one of most economically important diseases in the poultry industry. Developing an accurate and rapid test to identify the serotype of field strains has been important for the industry to effectively control outbreaks of the disease. To achieve this goal, the S1 subunit of s
Design 'optimization' of precision MEMS packages through the 'minimization' of package induced stresses.
Due to the complexity and precision associated with Micro-Electro-Mechanical System (MEMS) technology, package induced stress control accounts for a fairly large fraction of packaging efforts. Nowadays, most MEMS devices are sensors in nature and will be subjected to very dynamic environments while
A series of studies was conducted with the objective of evaluating the effect of supplementing dietary nucleotides in weaning pig diets. The first study was designed to measure the concentration of nucleotides in the colostrum and milk of sows. The concentrations of 5'AMP, 5 'CMP, 5'GMP, and 5'IMP c
Phenotypic and genotypic characterization of soybean and cowpea bradyrhizobia isolated from United States, Thai, and Chinese soils.
Diversity of indigenous soybean and cowpea bradyrhizobia isolated from the United States and Thailand and soybean bradyrhizobia isolated from China was examined using phenotypic analyses: serological reactions (ELISA) with antisera produced against reference soybean and cowpea-miscellany strains, ca
The Convention on International Trade in Endangered Species of Wild Fauna and Flora: Political or conservation success?
Portrayed in 1973 as a desperately needed response to the predatory impacts of the international wildlife trade, the Convention on International Trade in Endangered Species of Wild Fauna and Flora entered into force in 1975. Fifteen years later, 103 countries count themselves as Parties, and the com
In many process industries, characterization of a material during process is vital to control the process and assure product quality. The noninvasive and nondestructive characteristics of the tomographic techniques are suitable for these purposes. Here, tomographic techniques, specifically magnetic
Evaluation of barriers to black-tailed prairie dog ( Cynomys ludovicianus) colony expansion, Bad River Ranches, South Dakota.
he state of South Dakota recently approved a black-tailed prairie dog (Cynomys ludovicianus) conservation and management plan (House Bill 1252 and Senate Bill 216, An Act to Mitigate the Impact of Prairie Dogs), which placed restrictions on prairie dog colonies that encroach upon private property wh
The aim of this work was to use solid phase microextraction (SPME) as an experimental technique to probe food solute release from systems with and without surfactant solution. Limonene, a model hydrophobic aroma compound, was used as the solute and allowed to equilibrate in a closed system between t
Soil and surface straw movement by a single sweep tool were experimentally studied, and then physically based mathematical models were developed and validated. Soil bin and field experiments were conducted using cereal straw and a 325-mm-wide sweep to study soil and straw interaction. Experimental f
Effects of the ethylene binding inhibitor, 1-methylcyclopropene, on flue-cured tobacco (Nicotiana tabacum L.).
Three experiments were conducted from 2005 to 2008 to determine the effects of 1-methylcyclopropene (1-MCP) on harvest management of flue-cured tobacco. Treatments consisted of 1-MCP at a rate of 0.026 kg ai ha-1 and 0.0129 kg ai ha-1 applied at: 14 d prior to normal final harvest, 14 and 7 d prior
Metabolic and genetic regulation in adipose tissue of Angus and Wagyu steers raised to United States and Japanese endpoints.
We hypothesized that carcass and fatty acid composition of Angus and Japanese Black (Wagyu) steers would not differ if the steers were fed to a typical U.S. final weight, but that Wagyu steers fed to a typical Japanese endpoint body weight would have greater quality grades and softer fat than Angus
Conservation genetics of exploited Amazonian forest tree species and the impact of selective logging on inbreeding and gene dispersal in a population of Carapa guianensis.
The Amazon region is one of the richest areas on the planet in terms of its biodiversity and natural resources. The large scale harvesting of trees in this region is a relatively new activity, and it is uncertain whether the exploitation of timber species will result in depletion of forest genetic r
Today, there is a need to implement a proper design of an adequate surveillance system that detects and categorizes explosion phenomena in order to identify the explosion risk to reduce its impact through mitigation and preparedness. This dissertation introduces state-of-the-art classification of ex
Patterns of insect occurrence on trees and shrubs growing in an exotic habitat are unknown for most species.
Robinia neomexicana A. Gray is a common native shrub/tree in northern Arizona. A closely related species native to the eastern United States, R. pseudoacacia
This dissertation represents an attempt to construct an account of Adorno's ethics in terms of the Freudian understanding of the human being that undergirds Adorno's thought. It thus proceeds in two directions. First, it aims to illustrate the inadequacies in current attempts to reconstruct the ethi
Adhesive performance of soy protein isolate enhanced by chemical modification and physical treatment.
Soy protein has shown great potential to partly replace petroleum-based adhesives for the manufacture of particleboard, plywood, and various composites. The obstacle of applying a soy protein-based adhesive is its relatively poor water resistance. The overall objective of this research was to increa
Tracing (15)N in cropped and uncropped soil treated with enriched potassium nitrate and labeled clover residues.
In developed countries, nitrogen (N) fertilizers are cheap and easily available. In developing countries peasant farmers rely on biological N fixation because fertilizers can be prohibitively expensive. Legumes are sometimes used as green manure in southeastern USA, but crop uptake of legume N is us
Crop straw represents an abundant, inexpensive and renewable fiber source for papermaking. Use of straw as a papermaking material may reduce deforestation through adopting alternative pulping materials. However, current reliance on Na-based pulping technology often generates black liquor that produc
This study examines institutional change in forest management in Tlalmanalco, Mexico, over the period 1877--1999 based on qualitative methods. The level of analysis is the domain of forest management, a level of analysis intermediary between macro/national policy and micro/local organizations and gr
GOSSYM/COMAX is a dynamic crop model and expert system for cotton production. One of the most important uses of GOSSYM/COMAX is to assist inseason management decisions for cotton production, including nitrogen application. Validation studies indicated that the GOSSYM model sometimes predicts crop re