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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Veterinary science and public policy at the Cape Colony, 1877-1910

Gilfoyle, Daniel January 2002 (has links)
No description available.
2

Factors influencing Missouri livestock producer's perception of the national animal identification system /

Deimeke, Bryan L., January 1900 (has links)
Thesis (M.N.A.S.)--Missouri State University, 2008. / "May 2008." Includes bibliographical references (leaves 54-58). Also available online.
3

Evaluating Twitter as an agricultural economics research tool

Gatson Smart, Candace Elaine January 1900 (has links)
Master of Science / Department of Agricultural Economics / Glynn T. Tonsor / Over the past decade, social media has risen from an emerging novelty to the normative form of expression for many Americans. As these platforms have risen in popularity, researchers have recognized the potential for capturing information users are self-reporting about their beliefs and preferences. Simultaneously, social media corporations have become privy to the value of this information being freely shared by consumers and have safeguarded much of their historical data to monetize the data. Faced with both an enticing new source of data, but a steep price to obtain it, researchers must evaluate the potential gains that can be extracted from the often difficult to analyze data. This study explored the acquisition of social media, namely Twitter, data and the potential uses in the field of agriculture economics. A contract was secured with Sysomos, a social media analytics firm, in July of 2017 to collect raw Twitter data over the proceeding thirteen months. Changes in frequency of tweets and sentiment scoring of tweets were used to attempt to explain election results from November 2017 proposed legislations pertaining to marijuana and minimum wage as well as to explain and predict changes in the stock prices of selected publicly traded firms in the food producing sector. Twitter frequency changes were then compared to changes in traditional print media articles in an effort to determine the exchangeability of the two media sources when used to track events pertaining to animal health. Results of this study suggested that Twitter data possess little power to explain the studied election results, but creation of a strong model was difficult due to the limited number of months of data available. Changes in the frequency of tweets were not found to be a strong indicator of changes in the stock market on the average day, but were shown to explain potentially highly valued information to investors on days with large changes in price. Twitter and traditional print media were shown to be unique sources of data when exploring the topic of animal health events.
4

Awareness assessment of Safe-Guard® in the U.S. cattle industry

Ligtenberg, Tiffany G. January 1900 (has links)
Master of Agribusiness / Department of Agricultural Economics / Dustin L. Pendell / This research focuses on the cattle producer’s overall awareness of an internal deworming product available in the U.S. cattle market. Parasitism in cattle can be very costly for the producer, and identifying a need for deworming is instrumental to the decision-making process for animal health protocols. The additional cost of deworming products can be beneficial for profitability for cattle producers when used properly. Likewise, when there is no proven need for deworming products in certain operations, the additional cost is an unnecessary expense that can be avoided. Proper awareness and education regarding deworming products and the benefits they can provide is one crucial piece to improving herd health, better rates of gain, and increased profitability. The main objective of this study is to determine the awareness of non-handling formulations of Safe-Guard. To understand and assess awareness, a survey was used. A population of participants was developed and asked to participate in the survey either online or in hard copy. A binary logit is used to analyze how cattle producers make decisions in adopting animal health products into their operations. Influencing factors of operation type, size, location, producer’s age, and information sources are used in the assessment. Factors that were the most influential to the decision-making processes for producers were discussions with veterinarians, nutritionists, and animal health sales representatives. In addition to face-to-face discussions with neighboring producers/friends, industry meetings, and reading industry journals and publications were also important. These producers were aware of a few formulations of Safe-Guard, and used them within the previous twelve months of taking the survey. However, participants were generally unaware of the product, and its different formulations. Upon review of the assessed unawareness of the product formulations, it is apparent that the company needs to identify and select a better way to make producers aware. Different approaches to targeted marketing campaigns and more in depth product training for the animal health company’s sales representatives should be implemented to increase awareness and sales.
5

Assessing animal health delivery for tick and tick-borne disease control in smallholder dairy systems of Kenya an application of new institutional economics /

Ndung'u, Leah Wanjiru. January 2002 (has links)
Thesis (Ph. D (Veterinary Science))--University of Pretoria, 2002. / Includes bibliographical references.
6

Role and perceptions about communication: the case of new product development in the animal health industry

Tjernagel, Adam January 1900 (has links)
Master of Agribusiness / Department of Agricultural Economics / Vincent Amanor-Boadu / The development of vaccines and similar pharmaceutical products in the animal health industry are expensive and follow very specific pathways to comply with regulatory requirements for product licensure and registration. The vaccine development process is complex and involves numerous individuals, assets and departments within and outside the organization, and is a long process. The study stage of this long and complex process allows a company to confirm particular solutions to particular health incidents can be efficacious. The study stage involves executives who decide on new products that may be developed, managers who oversee the development of the products and scientists who develop protocols to undertake animal studies to test various aspects of the new product. It also involves clinical study personnel and laboratory personnel who conduct the experiments and collect data for analyses about the new products being studied. The number of people and time sensitivity of the processes contribute to the complexity, making effective communication critical to getting new products developed on time and on budget. The objective of this research is to identify perceived gaps in communication among people in the different roles with the view to finding solutions to address these gaps. Data were collected using an industry-focused online survey instrument. The instrument was designed to have both closed and open-ended questions. Survey participants were purposefully selected from across the global animal health industry, focusing on those directly involved in the study stage of new product development. The results showed the majority of respondents were satisfied with their company’s processes and systems for study development, initiation and execution, but people resources were viewed as the highest contributor to bottlenecks, which could demonstrate gaps in the communication links between groups. However, perceptions about challenges and gaps in communication seem to be influenced by who is providing information and who is receiving it. The different roles perceived the effect of timeliness, accuracy and clarity of communication on product development costs differently, with scientists presenting the highest cost of communication challenges and executives the lowest. On average, the perception was that these communication challenges increased the cost at the study stage of new product development by about 84% for biologicals and over 100% for pharmaceuticals.
7

The role of non-structural protein NS3 in the African horse sickness virus infection cycle in mammalian and insect cells

Ferreira-Venter, Linda 02 April 2020 (has links)
African horse sickness is an economically important equid disease caused by African horse sickness virus (AHSV). Upon infection, the virus produces seven structural proteins that constitute the virus particle, and four non-structural proteins with various supportive roles during replication. This study focused on the pleiotropic non-structural protein NS3 and its isoform, NS3A. Arthropod-borne viruses are uniquely equipped to replicate in multiple species, often with significant infection cycle differences. Notably, while AHSV infection is highly pathogenic to the mammalian host, the insect vector exhibits no detrimental effect. One potential contributing factor to these observed differences is the viral release mechanism, with NS3/A playing an essential role in mediating these final infection cycle stages. Multiple conserved protein domains have been identified for NS3/A. This study aimed to address questions regarding the way in which these domains contribute to the protein’s function, in mammalian and insect cells, respectively. The initial phase of this study involved augmenting a panel of reverse genetics-derived AHSV NS3mutants. As these viruses each express a modified version of the NS3/A protein, an in-depth investigation into the function of the different conserved domains was possible. Consequently, a comparative analysis of the wild-type and mutant virus strains was conducted in both mammalian and insect cells, using biochemical, virological and microscopy techniques. In mammalian cells, the results indicated a variable contribution of the different NS3/A domains to the cytopathic effect and in ensuring effective virus trafficking and release. The transmembrane (TM) domains were identified as essential mediators of NS3/A intracellular distribution, as the abnormal processing of the TM mutant proteins resulted in their nuclear localisation and unique interaction with another viral protein, NS1. Additionally, the TM domain disruptions resulted in cytosolic virus particle accumulation. A similar mutant phenotype was observed when the C-terminus of NS3/A was deleted, with an apparent lack of efficient virus trafficking and release. Disruption of the NS3/A late domain (LD) resulted in abnormal tethering of virions to the plasma membrane, suggesting that AHSV utilises the cellular ESCRT (Endosomal Sorting Complex Required for Transport) pathway for non-lytic release events within mammalian cells. Comparatively, while some of the NS3/A domains appear to have similar functions within insect cells, key differences were also observed. Most notably, within insect cells, NS3/A localised to the periphery of unique large cytoplasmic vesicle-like structures, likely facilitating non-lytic release. Interestingly, disruption of the TM domains of NS3/A resulted in the degradation of these mutant proteins as they could not be detected within infected cells. Correspondingly, this apparent absence of NS3/A resulted in diminished release, with most of the virus particles remaining cell-associated throughout the course of infection. Notwithstanding normal NS3/A protein localisation, deletion of the C-terminus of NS3/A also prevented proper virus egress. Disruption of the LD did not have any significant effect within insect cells, with no abnormal virus particle localisation and efficient virus release observed. Consequently, in insect cells, virus particle trafficking and release appears independent of characteristic cellular membrane trafficking systems utilised in mammalian cells. / Thesis (PhD)--University of Pretoria, 2020. / National Research Foundation (NRF) / Poliomyelitis Research Foundation / University of Pretoria Institutional Research Theme / Genetics / PhD / Unrestricted
8

Defesa sanitária animal em São Paulo: origens, formação e perspectivas frente aos novos enfoques zoossanitários / Animal health service in São Paulo: origins, formation and perspectives front to the new focuses in animal health

Lima, Zelia Marilia Barbosa 03 November 2003 (has links)
Utilizando-se a análise de conteúdo identificaram-se os marcos referenciais (nos níveis nacional e internacional) que orientaram a formação da defesa sanitária animal no Estado de São Paulo, desde a criação da Secretaria de Agricultura de São Paulo aos dias atuais. Descreveu-se o modelo atual de defesa animal, tendo como enfoque as dimensões organizacional, procedimental e operacional, precedida de uma recuperação histórica da sua formação. A defesa animal ocupou diferentes posições na estrutura organizacional da Secretaria, em função dos diferentes objetivos dos diferentes grupos governantes. Passou, de coadjuvante nos projetos de melhoramento animal, a instrumento dos controles legais. Este papel passou a ter maior nitidez, a partir de 1969, com a implantação da Campanha de Combate à Febre Aftosa. Consolidou-se, a partir da década de 1990, com a nova agenda do comércio internacional, do acordo constitutivo da Organização Mundial do Comércio e dos acordos e instrumentos jurídicos conexos que o compõem, especialmente com a adoção do Acordo sobre Aplicação de Medidas Sanitárias e Fitossanitárias. Constatou-se que as estratégias e políticas estabelecidas nos programas de defesa estão baseadas no marco referencial da epidemiologia tradicional. Este enfoque impede que se caracterizem e interpretem o papel que a organização sócio-econômica da produção possui na determinação dos problemas produtivos. A estreita aproximação entre os objetivos da defesa animal em São Paulo e os conteúdos das normas internacionais, coloca em segundo plano as prioridades internas. A base legal que define a organização da defesa não favorece a partilha do poder, no âmbito do próprio serviço, quando, contraditoriamente, espera-se de uma organização pública moderna: flexibilidade, interatividade, capacidade gerencial, visão estratégica e a prática de conceitos de qualidade. Apesar da grande quantidade de oferta de canais de participação e de integração com a sociedade não se evidenciam indicadores de efetividade. As regras estabelecidas para relações de convênio ou parceria mostram-se excessivamente burocratizadas, geralmente mais adequadas a relações com grandes grupos econômicos. Ao longo do período estudado, persiste o discurso sobre a execução de programas de Educação Sanitária, entretanto, os instrumentos e métodos descritos na base legal de atuação da defesa não privilegiam a abordagem educativa. / Using the content analysis, reference points, that have oriented the formation of the animal health service in São Paulo State, have been identified at national and international levels, since the creation starting of the Department of Agriculture of São Paulo until today. Preceded by a historical recovery of the animal health service build-up, the current model was described based on organizational, procedural and operational dimensions. Throughout the years, according to the different aims of several government groups, this service has played different roles in the Department of Agriculture?s organizational structure. The animal health service, from mere complementary technical support for the animal improvement projects, became an active agent in the control of animal diseases, especially since 1969, with the establishment of foot-and-mouth-disease control campaigns. This new role was consolidated, from the 1990´s on due to the new shedule in international trade and the constitutive agreement of the World Trade Organization and its the agreements and legal instruments mainly the adoption of the Sanitary and Phytosanitary Measures Agreement (SPS). It was noticed that established strategies and policies of animal health programs are based on traditional epidemiology reference points. This approach doesn?t allow characterization and interpretation of the role of social economic organization of production has in determining productive problems. The close relation between the aims of São Paulo animal health service and the contents of international health standards leads internal priorities to a second role. The legal basis which defines the animal health service organization doesn\'t promote power in its own service, as it is expected, on the other hand, a modern public organization with flexibility, interactivity, managing capacity, strategic vision and the quality concepts practices. Despite the great offer of participation channels and integration with civil society, there is no evidence of effectiveness. The rules established for pact relations or partnerships turned out to be excessively bureaucratic, generally more suitable for agreements among large corporations. The animal health service, in theory, has a permanent focus on sanitary education; however, tools and methods described in the legal basis of action of the animal health service, don\'t emphasize educational approach.
9

Defesa sanitária animal em São Paulo: origens, formação e perspectivas frente aos novos enfoques zoossanitários / Animal health service in São Paulo: origins, formation and perspectives front to the new focuses in animal health

Zelia Marilia Barbosa Lima 03 November 2003 (has links)
Utilizando-se a análise de conteúdo identificaram-se os marcos referenciais (nos níveis nacional e internacional) que orientaram a formação da defesa sanitária animal no Estado de São Paulo, desde a criação da Secretaria de Agricultura de São Paulo aos dias atuais. Descreveu-se o modelo atual de defesa animal, tendo como enfoque as dimensões organizacional, procedimental e operacional, precedida de uma recuperação histórica da sua formação. A defesa animal ocupou diferentes posições na estrutura organizacional da Secretaria, em função dos diferentes objetivos dos diferentes grupos governantes. Passou, de coadjuvante nos projetos de melhoramento animal, a instrumento dos controles legais. Este papel passou a ter maior nitidez, a partir de 1969, com a implantação da Campanha de Combate à Febre Aftosa. Consolidou-se, a partir da década de 1990, com a nova agenda do comércio internacional, do acordo constitutivo da Organização Mundial do Comércio e dos acordos e instrumentos jurídicos conexos que o compõem, especialmente com a adoção do Acordo sobre Aplicação de Medidas Sanitárias e Fitossanitárias. Constatou-se que as estratégias e políticas estabelecidas nos programas de defesa estão baseadas no marco referencial da epidemiologia tradicional. Este enfoque impede que se caracterizem e interpretem o papel que a organização sócio-econômica da produção possui na determinação dos problemas produtivos. A estreita aproximação entre os objetivos da defesa animal em São Paulo e os conteúdos das normas internacionais, coloca em segundo plano as prioridades internas. A base legal que define a organização da defesa não favorece a partilha do poder, no âmbito do próprio serviço, quando, contraditoriamente, espera-se de uma organização pública moderna: flexibilidade, interatividade, capacidade gerencial, visão estratégica e a prática de conceitos de qualidade. Apesar da grande quantidade de oferta de canais de participação e de integração com a sociedade não se evidenciam indicadores de efetividade. As regras estabelecidas para relações de convênio ou parceria mostram-se excessivamente burocratizadas, geralmente mais adequadas a relações com grandes grupos econômicos. Ao longo do período estudado, persiste o discurso sobre a execução de programas de Educação Sanitária, entretanto, os instrumentos e métodos descritos na base legal de atuação da defesa não privilegiam a abordagem educativa. / Using the content analysis, reference points, that have oriented the formation of the animal health service in São Paulo State, have been identified at national and international levels, since the creation starting of the Department of Agriculture of São Paulo until today. Preceded by a historical recovery of the animal health service build-up, the current model was described based on organizational, procedural and operational dimensions. Throughout the years, according to the different aims of several government groups, this service has played different roles in the Department of Agriculture?s organizational structure. The animal health service, from mere complementary technical support for the animal improvement projects, became an active agent in the control of animal diseases, especially since 1969, with the establishment of foot-and-mouth-disease control campaigns. This new role was consolidated, from the 1990´s on due to the new shedule in international trade and the constitutive agreement of the World Trade Organization and its the agreements and legal instruments mainly the adoption of the Sanitary and Phytosanitary Measures Agreement (SPS). It was noticed that established strategies and policies of animal health programs are based on traditional epidemiology reference points. This approach doesn?t allow characterization and interpretation of the role of social economic organization of production has in determining productive problems. The close relation between the aims of São Paulo animal health service and the contents of international health standards leads internal priorities to a second role. The legal basis which defines the animal health service organization doesn\'t promote power in its own service, as it is expected, on the other hand, a modern public organization with flexibility, interactivity, managing capacity, strategic vision and the quality concepts practices. Despite the great offer of participation channels and integration with civil society, there is no evidence of effectiveness. The rules established for pact relations or partnerships turned out to be excessively bureaucratic, generally more suitable for agreements among large corporations. The animal health service, in theory, has a permanent focus on sanitary education; however, tools and methods described in the legal basis of action of the animal health service, don\'t emphasize educational approach.
10

Avaliação do desempenho de frangos de corte e microbiota das instalações em dois programas de limpeza e desinfecção / Cleaning and disinfecting: poultry performance and microbiologyof facilities

Burbarelli, Maria Fernanda de Castro 22 June 2012 (has links)
O presente estudo teve como objetivos observar a influência de programas de limpeza e desinfecção sobre o desempenho de frangos de corte e na microbiologia das instalações. Foram realizados dois experimentos, ambos com 960 pintos de corte criadosaté 42 dias. No primeiro experimento o piso foi forrado com maravalha nova. No segundo a cama foi reutilizada, proveniente do primeiro experimento. Os tratamentos foram: comum: retirada da matéria orgânica e lavagem da instalação com água; europeu: remoção seca da matéria orgânica, lavagem com água sob pressão, aplicação do detergente alcalino, enxague, secagem, e aplicação de dois desinfetantes(glutaraldeído+formaldeído e paraclorometacresol). Os dados de desempenho avaliados foram consumo de ração, ganho de peso, peso final, conversão alimentar, viabilidade e índice de eficiência produtiva. As análises microbiológicas realizadas foram contagem total de microrganismos, quantificação de Clostridium Spp., E. Coli, Salmonella Spp. e Aspergillus Spp. através de suabes de piso, parede, comedouros, bebedouros e cortinas. Foram ainda coletadas amostras de cama, ração e água para avaliação microbiológica. As analises estatísticas foram realizadas pelo teste F para desempenho e teste de Kruskal-Wallis para microbiologia ambos com índice de significância (p>0,05)através do procedimento GLM do programa SAS . No primeiro experimento não houve diferença estatística significativa para desempenho e avaliações microbiológicas. No segundo experimento notou-se melhor desempenho dos animais do tratamento Europeu e redução da carga microbiológica. A limpeza e desinfecção possuem influências positivas no desempenho de frangos de corte. / Thisstudy aimed toobserve the influenceof programsof cleaning and disinfecting in performanceof broilersand microbiologyof the facilities. Two experiments were conducted, both with960 chicksof one dayraised from until42 days. In thefirst experiment, thefloor wascovered withnew woodshavings. Inthesecondthe litter wasreused. The treatments were:Common: removal of organic matterand washingplant;European: removal of dry organic matter, wash with water under pressure, application ofalkaline detergent,rinsing,drying,and application oftwo disinfectants. The performance parameters werefeed intake, weight gain, finalweight, feed conversion,feasibilityand scoreproductiveefficiency. Microbiological analyzesweretotal count ofmicroorganisms, quantification ofClostridiumspp., E.Coli, Salmonellaspp. and Aspergillusspp.through suabesfloor, wall, feeders, drinkers andcurtains. Were alsocollectedsamples oflitter,feed andwater formicrobiological evaluation. Thestatistical analyzeswereperformedby the F testfor performance andKruskal- Wallis test for microbiologyboth witha significance level (p>0.05)using thecomputer programSASPROCGLM. In the first experimentthere was nostatistically significanteffectsfor performanceand microbiological analyzes. In the second experimentit was notedbetter poultry performance ofEuropeantreatmentand reduction ofmicrobialload. The cleaningand disinfectionhavepositive influenceson performanceof broilers.

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