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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

Influência das alterações testiculares diagnosticadas pela histopatologia sobre as características biométricas, morfométricas e seminais em touros da raça nelore /

Goiozo, Paulo Felipe Izique. January 2008 (has links)
Resumo: O presente estudo objetivou avaliar a influência de afecções testiculares sobre as características biométricas, morfométricas e seminais em touros. Utilizou-se 56 touros da raça Nelore, pesando entre 420 e 600 kg e com idade entre 30 e 40 meses. A mensuração do perímetro escrotal e amostras de sêmen foram coletadas em três períodos com intervalos de 15 dias, e o espermograma foi realizado por métodos convencionais e coloração de Feulgen para estimativa dos percentuais de fragmentação nuclear. Os animais foram orquiectomizados e fragmentos de testículos foram submetidos a analises bacteriológicas, histopatológicas e morfométricas. Dentre os animais avaliados, 14 não apresentaram alterações testiculares, 15 orquite bacteriana, 10 degeneração, 10 orquite inespecífica e 7 hipoplasia testicular. As médias do perímetro escrotal não apresentaram diferenças significativas entre os grupos. Os resultados das análises seminais mostraram que a motilidade em animais normais é superior aos animais com orquite inespecífica e estatisticamente semelhante aos demais grupos. Quanto ao percentual de espermatozóides normais, animais normais e animais com hipoplasia testicular, apresentaram percentuais superiores aos demais grupos. Os defeitos de cabeça espermática e fragmentação nuclear de animais com orquite inespecífica foram superiores aos animais com testículos normais e hipoplásicos, e semelhantes os outros grupos. Animais com orquite inespecífica apresentaram área de epitélio seminífero inferior aos demais grupos e área de células de Leydig superior aos animais com testículos normais. Os touros avaliados mostraram um alto índice de alterações testiculares e um alto percentual de animais inaptos para reprodução. A biometria testicular não permitiu o diagnóstico das afecções testiculares. / Abstract: The present study aimed at to evaluate the testis changes influences about biometrics, morphometrics and seminal characteristics in bulls. Fifty six Nelore bulls, weighing between 420 and 600 kg and with age between 30 and 40 months were used. The scrotal perimeter measurement and semen samples were collected in three periods with intervals of 15 days, and the spermogrammes were evaluated by conventional methods and by Fuelgen stain for nuclear fragmentation evaluate. The animals were orqiectomyzeds and testis fragments were submitted to bacteriological, histhopatologicals and morphometrical analyses. Among the evaluated animals, 14 don't showed testis changes, 15 bacterial orchitis, 10 testicular degeneration, 10 unspecific orchitis and e 7 testicular hipoplasia. The scrotal perimeter averages didn't showed significant differences between groups. The results of the seminal analyses showed that the mobility in normal animals, it is superior to the animals with unspecific orchitis and statistically similar to the other groups. The percentage of the normal sperms in normal animals and animals with testicular hipoplasia was greater that others groups. The sperm head defects and nuclear fragmentation in animals with unspecific orchitis was greater that animals with normal and hipoplasic testis, and similar to others groups. Animals with unspecific orchitis showed somniferous epithelium area lower to others groups and Leydig cells area higher to animals with normal testicles. The bulls evaluated showed a high index of the testicular changes and a high percentage of the inapt animals to reproduction. The testicular biometric analysis don't allowed testicular diseases diagnose. / Orientador: Enio Pedone Bandarra / Coorientador: Pedro Paulo Pires / Banca: Raimundo Souza Lopes / Banca: Carlos Eurico dos Santos Fernandes / Mestre
2

Influência das alterações testiculares diagnosticadas pela histopatologia sobre as características biométricas, morfométricas e seminais em touros da raça nelore

Goiozo, Paulo Felipe Izique [UNESP] 22 June 2008 (has links) (PDF)
Made available in DSpace on 2014-06-11T19:23:59Z (GMT). No. of bitstreams: 0 Previous issue date: 2008-06-22Bitstream added on 2014-06-13T20:51:07Z : No. of bitstreams: 1 goiozo_pfi_me_botfmvz.pdf: 543267 bytes, checksum: 76d6c0af24937d881e8bd45fcc0340b8 (MD5) / Outros / O presente estudo objetivou avaliar a influência de afecções testiculares sobre as características biométricas, morfométricas e seminais em touros. Utilizou-se 56 touros da raça Nelore, pesando entre 420 e 600 kg e com idade entre 30 e 40 meses. A mensuração do perímetro escrotal e amostras de sêmen foram coletadas em três períodos com intervalos de 15 dias, e o espermograma foi realizado por métodos convencionais e coloração de Feulgen para estimativa dos percentuais de fragmentação nuclear. Os animais foram orquiectomizados e fragmentos de testículos foram submetidos a analises bacteriológicas, histopatológicas e morfométricas. Dentre os animais avaliados, 14 não apresentaram alterações testiculares, 15 orquite bacteriana, 10 degeneração, 10 orquite inespecífica e 7 hipoplasia testicular. As médias do perímetro escrotal não apresentaram diferenças significativas entre os grupos. Os resultados das análises seminais mostraram que a motilidade em animais normais é superior aos animais com orquite inespecífica e estatisticamente semelhante aos demais grupos. Quanto ao percentual de espermatozóides normais, animais normais e animais com hipoplasia testicular, apresentaram percentuais superiores aos demais grupos. Os defeitos de cabeça espermática e fragmentação nuclear de animais com orquite inespecífica foram superiores aos animais com testículos normais e hipoplásicos, e semelhantes os outros grupos. Animais com orquite inespecífica apresentaram área de epitélio seminífero inferior aos demais grupos e área de células de Leydig superior aos animais com testículos normais. Os touros avaliados mostraram um alto índice de alterações testiculares e um alto percentual de animais inaptos para reprodução. A biometria testicular não permitiu o diagnóstico das afecções testiculares. / The present study aimed at to evaluate the testis changes influences about biometrics, morphometrics and seminal characteristics in bulls. Fifty six Nelore bulls, weighing between 420 and 600 kg and with age between 30 and 40 months were used. The scrotal perimeter measurement and semen samples were collected in three periods with intervals of 15 days, and the spermogrammes were evaluated by conventional methods and by Fuelgen stain for nuclear fragmentation evaluate. The animals were orqiectomyzeds and testis fragments were submitted to bacteriological, histhopatologicals and morphometrical analyses. Among the evaluated animals, 14 don’t showed testis changes, 15 bacterial orchitis, 10 testicular degeneration, 10 unspecific orchitis and e 7 testicular hipoplasia. The scrotal perimeter averages didn’t showed significant differences between groups. The results of the seminal analyses showed that the mobility in normal animals, it is superior to the animals with unspecific orchitis and statistically similar to the other groups. The percentage of the normal sperms in normal animals and animals with testicular hipoplasia was greater that others groups. The sperm head defects and nuclear fragmentation in animals with unspecific orchitis was greater that animals with normal and hipoplasic testis, and similar to others groups. Animals with unspecific orchitis showed somniferous epithelium area lower to others groups and Leydig cells area higher to animals with normal testicles. The bulls evaluated showed a high index of the testicular changes and a high percentage of the inapt animals to reproduction. The testicular biometric analysis don’t allowed testicular diseases diagnose.
3

Using synthetic images to improve iris biometric performance

Hasegawa, Robert Shigehisa 01 January 2012 (has links) (PDF)
The rapid advance of information technology has allowed for a rise in the use of biometric markers to automatically track the identity of individuals. Iris biometrics has emerged as one of the most reliable and accurate systems when dealing with cooperating subjects, however, challenges arise when attempting to minimize the amount of intrusion when examining subjects. Allowing for more flexibility in data capture settings will introduce differences in the iris texture due to changes in ambient light, which may negatively impact recognition results. This research examines the feasibility of using 3D software to synthetically dilate the pupils of existing iris images to more closely match the size of a target image. Methods are developed first to evaluate the compatibility of synthetic images with iris identification software, and then to examine what specific areas of the iris texture differ between synthetic and real images. Results show synthetic images are found to be compatible with the recognition process and have the potential to improve performance.
4

Crop coefficient and water demand of sugarcane at the Teresina Region, Piauà State, Brasil / Coeficiente de cultura e demanda hÃdrica da cana-de-acÃcar na microrregiÃo de Teresina, PiauÃ

DÃnavan Holanda NolÃto 27 March 2015 (has links)
CoordenaÃÃo de AperfeÃoamento de Pessoal de NÃvel Superior / Sugarcane crop has great socio-economic importance worldwide. Brazil has the largest acreage and production volume in the world, with promising Northeast region because it has areas for expansion of the crop and stilling have a great energy potential. However, the cropping under natural water conditions limit production, making essential the use of supplemental irrigation during periods of drought. For thus its necessary studies to determine the water demand at various stages of crop development. The objective of this study was to determine the crop coefficient and water demand of sugarcane, through the energy balance method, based on the Bowen ratio, at the Teresina region, Piauà State, Brazil. The experiment was conducted at COMVAP - Sugar and Alcohol Ltda. The cultivar used was RB867515, irrigated by center pivot. The biometric analyzes were length and stem diameter, number of green leaves, leaf area and matter fresh and dry of stem, leaves and sheaths. To estimate crop evapotranspiration (ETc) was used an equipped tower with microelectronic sensors installed near the center of the growing area (10 ha plot). The reference evapotranspiration (ETo) was estimated by the Penman-Monteith method / FAO-56, based on data from a weather station located near the experiment. Soil moisture was monitored by an automated system (Time Domain Reflectometry) TDR at depths from 0 to 0.30 0.30 to 0.60 m, at four points surrounding the tower. The number of green leaves per plant ranged from six to nine, reducing to seven leaves in the end of the cycle. The stems reached approximately 3.3 m long and 2.02 kg of weight, presenting linear gains in length and mass, while its diameter remained stable (25-27 mm). The plant leaf area showed quadratic behavior, with maximum peak of 4,197 cm2 to 254 days after cutting. The balance of average daily solar radiation was 13.7, 13.2 and 16.1 MJ m-2, corresponding to 79%, 80% and 85% of the total radiation, while the coefficient clarity showed values of 0.46, 0.48 and 0.52 and the albedo of 0.15, 0.16 and 0.14, in phenological development phases II, III and IV, respectively. The physical consistency of the ETC analysis data showed that 33% of 406 days monitored were agreement. The ETc daily average was 5.3 mm, with a demand of 2,650 mm for the 498 days of the cycle. The crop coefficient (Kc) average per phase was 0.9 (fast growth), 1.32 (maximum development) and 1.07 (maturation). / A cana-de-aÃÃcar possui grande importÃncia socioeconÃmica em Ãmbito mundial. O Brasil detÃm a maior Ãrea cultivada e volume de produÃÃo no mundo, sendo a regiÃo Nordeste promissora para o setor por possuir Ãreas para expansÃo da cultura e ainda ter um Ãtimo potencial energÃtico. PorÃm, as condiÃÃes hÃdricas naturais limitam a produÃÃo, tornando essencial o uso de irrigaÃÃo complementar nos perÃodos de dÃficit hÃdrico. Para a adequada suplementaÃÃo hÃdrica da cultura necessita-se determinar a demanda hÃdrica nos diferentes estÃdios de desenvolvimento da cultura. Assim, o objetivo deste estudo foi determinar o coeficiente de cultura e a demanda hÃdrica da cana-de-aÃÃcar, por meio do mÃtodo de balanÃo de energia, com base na razÃo de Bowen, na microrregiÃo de Teresina, PiauÃ. O experimento foi conduzido na Usina COMVAP â AÃÃcar e Ãlcool Ltda., municÃpio de UniÃo, microrregiÃo de Teresina, PiauÃ. A cultivar utilizada foi a RB867515, irrigada por pivà central. As anÃlises biomÃtricas realizadas foram: comprimento e diÃmetro do colmo, nÃmero de folhas verdes, comprimento e largura da folha +3, Ãrea foliar e matÃria fresca e seca do colmo, bainhas e folhas. Para a estimativa de evapotranspiraÃÃo da cultura (ETc) usou-se uma torre equipada com sensores automÃticos, instalada prÃxima ao centro da Ãrea de cultivo (talhÃo de 10 ha). A evapotranspiraÃÃo de referÃncia (ETo) foi estimada pelo mÃtodo Penman-Monteith/FAO-56, a partir de dados de uma estaÃÃo agrometeorolÃgica localizada prÃximo ao experimento. A umidade do solo foi monitorada por um sistema automatizado com base em Reflectometria no DomÃnio do Tempo (TDR), nas profundidades de 0 a 0,30 m e 0,30 a 0,60 m, em quatro pontos no entorno da torre. O nÃmero de folhas verdes por planta variou de seis a nove, reduzindo a sete folhas ao final do ciclo. O colmo alcanÃou aproximadamente 3,3 m de comprimento e 2,02 kg de massa fresca, apresentando ganhos lineares de comprimento e massa, enquanto o seu diÃmetro permaneceu praticamente estÃvel (25 a 27 mm). A Ãrea foliar da planta demonstrou comportamento quadrÃtico, com pico mÃximo de 4.197 cm2, aos 254 dias apÃs o corte. O saldo de radiaÃÃo solar mÃdio diÃrio foi de 13,7 MJ m-2, 13,2 MJ m-2 e 16,1 MJ m-2, correspondendo a 79%, 80% e 85% da radiaÃÃo global, enquanto o coeficiente de claridade apresentou valores de 0,46, 0,48 e 0,52 e o albedo de 0,15, 0,16 e 0,14, nas fases II, III e IV de desenvolvimento fenolÃgico da cultura, respectivamente. A anÃlise de consistÃncia fÃsica dos dados de ETc mostrou que 33% dos 406 dias monitorados foram consistentes. A ETc mÃdia diÃria foi de 5,3 mm, totalizando uma demanda de 2.650 mm para os 498 dias do ciclo. O coeficiente de cultura (Kc) mÃdio por fase foi de 0,9 (crescimento rÃpido), 1,32 (mÃximo desenvolvimento) e 1,07 (maturaÃÃo).
5

Climatic variability at Modoc Rock Shelter (Illinois) and Watson Brake (Louisiana): biometric and isotopic evidence from archaeological freshwater mussel shell

Caughron, Sarah Mistak 11 December 2009 (has links)
This thesis assesses climate change during the Hypsithermal Climatic Interval through the analysis of freshwater mussel remains from archaeological sites in Eastern North America. Modern climate data was used as a model to test the mosaic consequences of climate change. Freshwater mussels: can be used as indicators of precipitation by examining changes in overall size through time: larger mussels are found in larger streams, while smaller mussels are found in smaller streams. This study combines morphometric and isotopic data from archaeological freshwater mussels at Modoc Rock Shelter, Watson Brake, Plum Creek, Owens site, and Landerneau mounds to assess past climatic conditions. At Modoc Rock Shelter, oxygen isotopic data corroborate morphometric data and show that climate was fluctuating with a period of stability at the onset of the Hypsithermal. The oxygen isotopic data sets from the Louisiana sites show that the mid-Holocene was much warmer than the late-Holocene.

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