58 research outputs found

    How to perform a simultaneous optimization with several response variables

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    A problem facing the product development community is developing simultaneous solutions of response variables (to several properties) that depends on a number of independent variables or sets of responses. Harrington, among others, addressed this problem and presented a desirability function with a functional approach. Derringer and Suich altered their approach and illustrated how multiple variables can be transformed into a convenience function. This work redid the calculation performed by them using another software and made a comparative discussion of the results found

    In vitro evaluation of the efficacy of commercial disinfectants used in pre and post-dipping against Staphylococcus spp. isolated from bovine mastitis

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    Objetivou-se com este estudo avaliar a sensibilidade in vitro de Staphylococcus spp.frente a alguns desinfetantes comerciais utilizados no pré e pós-dipping em vacas leiteiras. Foram testados um total de 60 isolados de Staphylococcus spp. identificados como S. aureus (50) e Staphylococcus coagulase positiva (10) recuperados de glândulas mamárias de vacas com mastite subclínica procedentes das regiões Metropolitana do Recife, Agreste e Zona da Mata do Estado de Pernambuco. O estudo da eficácia dos desinfetantes utilizados no pré e pós-dipping foi realizado utilizando-se os seguintes princípios ativos: cloro (2,5%), iodo (0,57%), clorexidine (2,0%), amônia quaternária (4,0%) e ácido lático (2,0%) em quatro tempos distintos (15", 30", 60" e 300"). Observou-se que 100% de S. aureus foram sensíveis ao iodo, 93,3% sensíveis a clorexidine, 80% sensíveis a amônia, 35,6% sensíveis ao ácido lático e 97,8% resistentes ao cloro no tempo de 60". Com relação a Staphylococcus coagulase positiva (SCP), 100% dos isolados foram sensíveis ao iodo, 81,8% sensíveis a amônia quaternária, 99,9% sensíveis ao ácido lático, 72,7% sensíveis a clorexidine e 100% resistentes ao cloro no tempo de 60". Conclui-se que a maior atividade desinfetante in vitro foi verificada para o iodo e clorexidine frente a S. aureus e do iodo e ácido lático frente aos SCP e que há necessidade de avaliação periódica dos desinfetantes utilizados nas propriedades leiteiras nas regiões estudadas, pois, existem variações no perfil de sensibilidade e resistência aos desinfetantes que podem comprometer os programas de controle da mastite bovina causada por Staphylococcus spp.The objective of this investigation was to evaluate the in vitro sensibility of Staphylococcus spp. to several commercially available disinfectants used for pre and post dipping. A total of 60 isolates of Staphylococcus spp., identified as Staphylococcus aureus (50) and Positive coagulase Staphylococcus (10) were obtained from the mammary glands of dairy cows with subclinical mastitis in the regions of Metropolitan Recife, the Agreste and the Zona da Mata of the State of Pernambuco, Brazil. As active ingredients were used a chlorine base (25%), iodine (0.6%), chlorhexidine (2.0%), quaternary ammonium (4.0%), and lactic acid (2.0%) at four specific intervals (15", 30", 60", and 300"). One hundred percent of S. aureus was found to be sensitive to iodine, 93.3% to chlorhexidine, 80% to ammonia, 35.6% to lactic acid, and 97.8% were resistant to chlorine at a 60-minute interval. With respect to the Positive coagulase Staphylococcus (SCP), 100.0% of the isolates were sensitive to iodine, 81.8% to quaternary ammonium, 99.9% to lactic acid, 72.7% to chlorhexidine, and 100% was resistant to chlorine at an interval of 60 minutes. It can be concluded that the highest disinfectant activity in vitro was found to be with iodine and chlorhexidine for S. aureus, and with iodine and lactic acid for SCP. A further conclusion was that it is important to undertake a periodic evaluation of the disinfectants used on the dairy properties in the regions studied, given the variety of sensibilities and resistance to disinfectants used, which may prejudice the control of bovine mastitis caused by Staphylococcus spp

    Influence of saltwater intake on the health of dairy cattle

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    Water is an element extremely important, essential for life, and necessary to maintain some factors such as intracellular pressure, assist digestive processes, carry nutrients, eliminate toxins through urine and allow the thermal balance of living things. However, it is a scarce element as the national water resources policy in Brazil advocates. In recent years water has become one of the biggest global problems due to lack and quality. The objective of this study was to evaluate the influence of saline intake on the health of dairy cattle. The actions consisted of periodic visits to a rural property located in the city of Pesqueira, Agreste Pernambucano - Brazil, whose main economic activity is milk production and cheese making. The herd has milk aptitude and consists of 182 animals. Samples of desalination tailings water that were supplied for quench the animals were collected. Blood samples from the cattle were collected and sent for hematological exams. The results showed alterations of some physicochemical parameters of water and high serum levels of chloride and sodium in cattle. The continuous intake of wastewater from the desalination process for the quench of dairy cattle alters the serological and physiological patterns of these animals. Further studies must be conducted on dairy products regarding their quality and health impact

    Supply chain analysis through partner suppliers: a study of a small-medium sized company in Brazil

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    Ferreira, Ana Cristina, e outros (2023) - International conference on technology management and operations. - Lisboa : Universidade Lusíada Editora. - ISBN 978-898-640-273-0.With the process of globalization of economies, companies have been suffering increasing competition in the search for and maintenance of customers. Thus, opportunities that represent competitive advantage have been analysed and, many times, adopted. In this context, the supply chain can be a competitive differential, as it favours cost reduction and quality improvement of production resources. On the other hand, delays, and shortages of inputs in the production chain generate losses of resources and damage the company’s image with its customers. Within this perspective, the supply chain of a heavy machinery and equipment manufacturer, addressing the indicators Supplier Potential (PF), Supply Conformity Index (ICF) and Service Index (AI). The objective of this research was to identify the delays and shortages of inputs, arising from the company’s supply chain, as well as from the purchasing and parts collection process. To this end, the fundamentals of Taker ship and Management by Indicators were adopted, a ming to achieve the proposed objectives. The work sought to collect data from the root year of the analysed process so that a picture could be made of how the process happened in he beginning, in the year 2008 and these data reflect the current reality of the company 2021. The study indicated the need for a new purchasing and parts collection system that could contribute to the elimination or reduction of the identified losses. The results obtained showed the successes in the supply chain integration strategy, using partner suppliers, as well as the implementation of a Milk Run type parts collection system

    Scientific research trends about metaheuristics in process optimization and case study using the desirability function

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    This study aimed to identify the research gaps in Metaheuristics, taking into account the publications entered in a database in 2015 and to present a case study of a company in the Sul Fluminense region using the Desirability function. To achieve this goal, applied research of exploratory nature and qualitative approach was carried out, as well as another of quantitative nature. As method and technical procedures were the bibliographical research, some literature review, and an adopted case study respectively. As a contribution of this research, the holistic view of opportunities to carry out new investigations on the theme in question is pointed out. It is noteworthy that the identified study gaps after the research were prioritized and discriminated, highlighting the importance of the viability of metaheuristic algorithms, as well as their benefits for process optimization

    Cardioestimulaçao Transesofágica

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    O eletrocardiograma de 12 derivaçoes apresentava-se dentro dos padroes de normalidade, com ritmo sinusal, frequência cardíaca de 77 ppm, intervalo PR de 140 ms, sem sinais de pré-excitaçao ventricular

    Perfil do consumidor de carne bovina no Estado de Roraima / Profile of beef consumer in the state of Roraima

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    O objetivo desta pesquisa foi analisar o perfil do consumidor de carne bovina no Estado de Roraima. A pesquisa foi desenvolvida no ano de 2020 aplicando-se 512 questionários via online, subsidiando a coleta de dados, com revelação e interpretação de caráter exploratório baseando-se em análises quantitativas e qualitativas. As questões presentes no questionário relacionavam-se com o perfil social, consumo e aquisição de carne bovina. Os dados foram obtidos e processados utilizando-se o programa Excel 2010 da Microsoft®, versão para Windows 10. Quando questionados quanto à frequência do consumo de carne bovina, 91,2% (467/512) revelaram consumir essa proteína de origem animal mais de uma vez durante a semana e 39,2% (201/512) relataram que ocorre o aumento desse consumo nos finais de semana e feriados. Sendo o açougue de supermercado o estabelecimento escolhido por 89,6% (459/512) dos entrevistados, para a aquisição desse produto, no qual 37,9% (194/512) dos indivíduos afirmaram que a qualidade dos produtos ofertados nesse local é o que os levam a escolhê-lo e 60,1% (308/512) responderam que na maioria das vezes encontram a carne de sua preferência. Do total de respondentes, 71,3% (365/512) apontaram a coloração como sinônimo de qualidade e que no momento da compra, 57,4% (294/512) julgam a aparência como o aspecto prioritário e 20,9% (107/512) indicaram que o preço é fator decisivo para se adquirir esse produto. Em relação à proteína animal que melhor substituiria a carne bovina, 52,3% (268/512) sugeriram o frango como o melhor substituto. Em respeito ao serviço de inspeção de produtos de origem animal, 85,1% (436/512) dos entrevistados afirmaram ter conhecimento a respeito do assunto, enquanto 14,9% (76/512) relataram o contrário, sendo o Médico Veterinário o profissional responsável por desempenhar essa função, apontado por 62,9% (322/512) dos indivíduos. Em relação ao grau de informação dos riscos associados ao consumo de carne clandestina, 72,8% (373/512) declararam estarem cientes sobre os riscos e 27,2% (139/512) expressaram que não se sentem informados. Acerca de transmissão de doenças a partir do consumo de carne bovina, 89,6% (459/512) responderam que há essa possibilidade e 10,4% (53/512) garantiram que não ocorre à transmissão. Desta forma este trabalho vem contribuir para a cadeia produtiva da carne bovina no Estado de Roraima, fornecendo subsídios para planos e ações a serem elaborados, tanto na produção quanto na industrialização, na comercialização e até mesmo no marketing.
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