Monografias, Dissertações e Teses
URI permanente desta comunidadehttps://repositorioacademico.universidadebrasil.edu.br/handle/123456789/1
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Resultados da Pesquisa
Item Ambiência, comportamento ejaculatório e parâmetros do sêmen de garanhões Quarto de milha(Universidade Brasil, 2023) Rissi, Letícia Sarro; Brennecke, Käthery; Orlandi, Cássia Maria BarrosoThe environment in which horses are placed, especially those undergoing reproductive management, is an important aspect to be evaluated. Since reproductive processes can be influenced by well-being issues, disruptions in physiological factors caused by stress can interfere with reproductive performance. The objective of this study was to assess the influence of the collection room ambiance on the behavior, semen volume, and concentration of Quarter Horse stallions. The stallions used had weights ranging from 416 to 505 kg and ages within active sexual maturity, varying from 6 to 24 years, selected based on fertility index. The experimental design employed was a dependent paired-sample design with four stallions. Movements during mounting and dismounting were observed, with a chronological recording of copulatory behavior using a camera attached to a mobile device (Samsung, model SM-A107 M/DS, Galaxy A 10s). Parameters such as muscle contraction, tail movement, and pawing were documented by day, month, and time, with identification of each animal. This analysis was initially conducted at normal video speed, and subsequently, for confirmation, the video speed was slowed down to work with each behavior separately. The frequency (number) of each activity involved in the process and the elapsed time (in seconds) for each activity were recorded. These data were then correlated with the ambiance, assessed by local internal and external temperature, digital device (dry and wet bulb), wind speed, dew point, relative humidity, and black globe index. The model also considered semen volume and concentration. The results did not reveal any influence of the collection room ambiance on the behavior, semen volume, and concentration of Quarter Horse stallions.Item Laser Speckle Contrast Analysis (LASCA) aplicada à avaliação de estresse(Universidade Brasil, 2024) Carvalho, Claudia Maria Sousa de; Amaral, Marcelo Magri; Santos, Laurita dosDespite being physiologically normal, exaggerated and continuous exposure to stress, which exceeds the individual's tolerance capacity, can result in harm to health. The objective of this study was to apply the optical technique Laser Speckle Contrast Analysis (LASCA) to assess stress. This is a cross-sectional, descriptive, experimental study, with a quantitative approach, developed with undergraduate and postgraduate students, at a Higher Education Institution, in São Paulo (SP). The sample consisted of 27 (twenty-seven) participants, randomly distributed. The inclusion criteria were: undergraduate and postgraduate students, of both sexes, aged 18 or over, regularly enrolled. Those who self-reported having cardiovascular complications or using medication that altered cardiovascular functioning, suspected or confirmed pregnancy, physical limitations and women in their menstrual period were excluded. Data collection took place in June and August 2021 and all protective measures were adopted in relation to the coronavirus pandemic. Participants underwent cardiac signal acquisition to analyze heart rate variability, obtained using an electrocardiogram and a Polar V800 heart rate monitor, for 15 minutes. Simultaneously, the LASCA application was developed to obtain images using the MoorFLPI (Full-Field Laser Perfusion Imager) equipment. Next, participants underwent a physical effort test using an electric treadmill for 15 minutes, following the Bruce protocol. After resting for 5 minutes, cardiac signals and LASCA images were collected again, following the same protocols as in the initial phase. The project was approved by the Ethics and Research Committee of Universidade Brasil, under Opinion No. 4.724.843. Equivalent results were found regarding HRV measurements when comparing the LASCA technique and conventional methods, enabling the capture of signs of physiological changes present in the individual's state of stress. Thus, the results point to the feasibility of the LASCA technique to obtain images compatible with the heart rate pulsation pattern from the stress generated in situations of physical effort.Item Índices de tolerância ao estresse térmico e características fisiológicas de cabras Saanen no Tocantins(Universidade Brasil, 2019) Moraes, Eder Brasil de; Bertipaglia, Liandra Maria Abaker