01. Universidade Federal Rural de Pernambuco - UFRPE (Sede)
URI permanente desta comunidadehttps://arandu.ufrpe.br/handle/123456789/1
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Resultados da Pesquisa
Item Desempenho e características de carcaça de cordeiros alimentados com palma forrageira ensilada ou in natura sob restrição ou não de água(2025-03-11) Amaral, Thiago Garcia do; Monnerat, João Paulo Ismério dos Santos; http://lattes.cnpq.br/3851426263880079; http://lattes.cnpq.br/8390297229951855A pecuária no semiárido brasileiro enfrenta desafios devido à escassez hídrica e à baixa disponibilidade de volumosos de qualidade, sendo a palma forrageira uma alternativa para a alimentação e hidratação dos ovinos. No entanto, sua forma de fornecimento pode impactar o desempenho dos animais. Este estudo avaliou os efeitos da palma forrageira in natura e ensilada, associadas ou não à restrição hídrica, sobre o desempenho produtivo e as características de carcaça de cordeiros da raça Santa Inês. Foram utilizados 40 cordeiros machos, não castrados, com idade entre 90 e 120 dias e peso inicial médio de 23,07 ± 2,45 kg, distribuídos em delineamento em blocos casualizados (DBC), num esquema fatorial 2x2, com dois tipos de volumoso (palma in natura + feno ou silagem de palma e feno) e duas formas de oferta hídrica (livre ou restrita). O período experimental foi de 75 dias, incluindo 19 dias de adaptação e 56 dias de coleta de dados. Os tratamentos foram dieta a base de silagem de palma e feno com ou sem restrição de água e outro a base de palma in natura + feno com ou sem restrição de água, ambos na proporção volumoso: concentrado de 65:35. sendo ofertada duas vezes ao dia, às 8h e às 16h. O consumo alimentar foi monitorado diariamente. Ao final do período experimental, os cordeiros foram submetidos a jejum sólido de 16 horas e abatidos. Após o abate, as carcaças foram pesadas feitas avaliações de medidas morfométricas, rendimento de carcaça, deposição de gordura perirrenal e espessura de gordura subcutânea. Os animais que receberam silagem de palma e feno apresentaram maior (P<0,05) desempenho, rendimento dos cortes lombo e serrote e melhor conformação e acabamento, em comparação aos que consumiram palma in natura + feno, entretanto não foi observado efeito (P>0,05) nos rendimentos de carcaça, pH, temperatura, EGS e avaliações morfometricas da carcaça. Por outro lado, a restrição de água não afetou (P>0,05) as características e rendimento de carcaça, engorduramento e as avaliações morfometricas, porém interferiu (P<0,05) negativamente no desempenho, conformação, acabamento e cortes cárneos lombo e serrote dos cordeiros em crescimento, evidenciando a importância do acesso irrestrito à água para o desenvolvimento adequado dos cordeiros. Conclui-se que a utilização da palma forrageira ensilada se mostra como alternativa mais eficiente em comparação à palma in natura, proporcionando maior desempenho produtivo dos animais. A restrição hídrica impacta negativamente o desempenho e as características de carcaça dos cordeiros, independentemente do tipo de volumoso ofertado.Item Qualidade de queijos coalhos adicionados de óleos essenciais em sua formulação(2024-09-30) Silva, Maria Manuele Dantas Pereira da; Soares, Luciana Felizardo Pereira; Rocha, Laura Leandro da; http://lattes.cnpq.br/7226123934022759; http://lattes.cnpq.br/4071178363761831; http://lattes.cnpq.br/9024775534481122The objective of this study was to evaluate the physicochemical composition of coalho cheese with the addition of essential oils of oregano, rosemary, and thyme in its formulation at different maturation times. The research was designed as a completely randomized design in a 3x4 factorial arrangement, in triplicate, at three maturation times: 0 (fresh cheese), 15, and 30 days, with four types of coalho cheese: control cheese without essential oil; with oregano essential oil; rosemary oil; and thyme oil, the last three with equivalent concentrations of 40 μL. The physicochemical characteristics of the cheeses at each period were evaluated. The quality of the milk used as raw material was assessed for physical properties, chemical composition, and the presence of pathogenic microorganisms. The milk used as raw material met the quality standards required by legislation. Compared to fresh cheese, a decrease in moisture content was observed over the maturation period, from 55.94% moisture at 0 days to 54.62% and 53.58% at 15 and 30 days, respectively. Regarding the percentage of fat, ash, and acidity, there was a reduction over the evaluated times. There was no significant variation in protein content between the maturation periods. According to the average yields of the treatments (kg), they corresponded to 1.41 kg, 1.30 kg, 1.51 kg, and 1.43 kg for cheeses without oils, with oregano oil, rosemary oil, and thyme oil, respectively. Greater economic viability was observed in cheeses with rosemary and thyme oils, with percentages of 19.5% and 2.9% more favorable compared to the control. The use of essential oils of oregano, rosemary, and thyme in the formulation of coalho cheese proved to be a promising strategy that can modify and improve specific characteristics of coalho cheese, depending on the desired objective. Additionally, it can increase the yield of cheeses with the addition of rosemary and thyme oils, offering a viable and advantageous alternative for the dairy industry and providing differentiated products with higher added value for the consumer market.Item Características de carcaça de matrizes ovinas de descarte(2024-10-01) Silva Neto, Adeildo Gomes da; Monnerat, João Paulo Ismério dos Santos; http://lattes.cnpq.br/3851426263880079; http://lattes.cnpq.br/3166354588303333The national sheep herd reached a total of 21,792,139 heads in 2023, with the state of Pernambuco accounting for 3,674,659 heads, a significant number of animals, many of which are annually culled. In sheep farming systems, ewes are essential tools for animal production, but they occasionally need to be culled, either due to age or health reasons that compromise their productive performance. When culled, these ewes' carcasses need to be utilized in some way, often being sold for consumption. However, meat from older or culled animals is undervalued due to its sensory characteristics and is often considered of low quality and low acceptability by consumers. Despite the low consumption of this species' protein, there is potential for a sheep meat market in Brazil. Research evaluating sheep meat quality typically focuses on studies investigating differences in sex, slaughter age, breed, diet, and production systems, with the vast majority being conducted on lambs. Meanwhile, studies on adult sheep, especially cull ewes, are almost nonexistent in the scientific literature. This study was conducted using 12 cull ewes of the Santa Inês breed, from the sheep herd of the Animal Science Department at UFRPE, with an average age of 33 months and an average weight of 56 ± 6.99 kg. The objective was to characterize the qualitative and quantitative aspects of cull ewe carcasses intended for meat production. It was observed that more research is needed to evaluate cull ewe carcasses in order to define carcass grading guidelines for this category, focusing on differentiating conformation and quality standards.Item Rendmax, software para cálculo e análise de volume e rendimento máximo em madeira serrada(2024-03-05) Coelho, Gustavo Andrade; Nogueira, Marcelo; http://lattes.cnpq.br/2791448000405507; http://lattes.cnpq.br/3210826106891832A sawmill is a location where logs of wood are received, stored, processed, and subsequently dried for a specific period. Sawmills are commonly classified based on their daily production, that is, their yield, categorizing them into small, medium, and large scale. Various factors influence this yield, and in the absence of proper control or monitoring, there is a tendency for production losses. As an alternative, sawmill automation emerges as a viable solution, especially through the utilization of information technology. This involves implementing optimization systems for cutting calculations, which can be developed using progxanumng languages such as HTML, CSS, and JavaScript. In this context, the aim of this work was to develop software for optimizing the sawing of wood logs to achieve maximum volume and yield in wood utilization. In developing the mathematical models used to estimate the volume and maximum yield of sawn wood from a log, as well as the corresponding software, four predefined scenarios commonly used in sawmills were considered. In each of these scenarios, calculations were manually performed using the same values employed in the program tests, with the goal of verifying the software's proper functioning in each established scenario. Subsequently, following the calculation methodology, software was developed to optimize the process of converting wood logs into mechanically processed pieces. This software was built using programming languages JavaScript, HTML, and CSS. HTML was used to structure the website. while CSS was responsible for the design, colors, shadows, size, and positioning of elements. JavaScript was responsible for the software's source code, that is, the program's interactivity, including input requests, variable creation, internal calculations, interactions, interactive menus, animations, and validations. By combining these three languages, it became feasible to automate the data acquisition process following the same empirical reasoning, based on equations. However, in this case, with an approach carried out through the creation of codes and commands using programming languages. This enables achieving the desired result, maximizing log utilization according to the scenario, demonstrating its effective applicability in the market.Item Carbonização e análise imediata do carvão vegetal da madeira de Mimosa caesalpiniaefolia Benth e Cupania racemose (Vell.) Radlk(2018-03-01) Gonçalves, Caio Pedro da Silveira; Nogueira, Marcelo; http://lattes.cnpq.br/2791448000405507This paper had the objective of determining the gravimetric yield of the carbonization of Mimosa caesalpiniaefolia and Cupania racemose for charcoal characterization of the wood of these species and indicate the most viable for use as fuel. For the study, six individuals from Mimosa caesalpiniaefolia Benth and six from Cupania Racemosa (Vell.) Radlk were collected at the Pedra Bonita site in Chã-grande, PE, Brazil. The individuals were sectioned in disks along the shaft and later, chips of dimensions 49 x 20 x 4 mm were made along the trunk. The chips were homogenized, comminuted, quarteted and transported to the Forest Technology Laboratory of the Federal Rural University of Pernambuco. Each carbonization was conducted in a total time of 210 minutes at a maximum temperature of 460 ± 10 ° C in a temperature-controlled muffle type oven, rate of 1.4 °C/min after the first hour. NBR 8112/1986 was used, which prescribes the method for the immediate analysis of charcoal. In addition to the NBR, the immediate analysis was conducted according to an adaptation from CETEC (1982) to ASTM (American Society for Testing and Materials) standards. The basic density found for Mimosa caesalpiniaefolia and Cupania racemose was, respectively, 0.87 and 0.83 g / cm 3. The values of ash, volatile matter content, fixed carbon and gravimetric yield for the Sabiá were 1.74%, 46.89%, 44.49% and 44.34%, respectively; and for the Cabotã was 0.25%, 55.26%, 51.36% and 44.12%, respectively. Therefore, both the charcoal coming from Mimosa caesalpiniaefolia and from Cupania racemos have satisfactory characteristics for energy purposes. However, in comparison among the species studied, Cupania racemosa is the most suitable for use as fuel.