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Thèses sur le sujet « Semen »

Auteur : Grafiati

Publié le 4 juin 2021

Mis à jour le 25 juillet 2025

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1

Badenoch, D. F. "Semen analysis and fertility." Thesis, University of Oxford, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.375208.

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Carson, Claire Elizabeth. "Risk factors for poor semen quality : a study of men undergoing semen analysis." Thesis, London School of Hygiene and Tropical Medicine (University of London), 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.424325.

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3

Vilakazi, David Mxolisi. "Factors affecting the quality of semen of AI dairy bulls in South Africa." Pretoria : [s.n.], 2005. http://upetd.up.ac.za/thesis/available/etd-09022005-150724.

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4

Farrás, Marcel Cavalcanti [UNESP]. "Avaliação da fragmentação do DNA espermático de sêmen refrigerado de garanhões." Universidade Estadual Paulista (UNESP), 2012. http://hdl.handle.net/11449/98144.

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Made available in DSpace on 2014-06-11T19:29:14Z (GMT). No. of bitstreams: 0 Previous issue date: 2012-01-26Bitstream added on 2014-06-13T18:58:50Z : No. of bitstreams: 1 farras_mc_me_botfmvz.pdf: 544796 bytes, checksum: 513d0af00d97f12c80a9d388b7fd8f78 (MD5)<br>Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)<br>Nas últimas décadas, muitos estudos têm sido realizados nas diferentes espécies com o intuito de se determinar os fatores envolvidos no processo da fragmentação do DNA espermático. A biologia molecular voltada à área da reprodução tem resultado em inúmeras técnicas para

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5

Falleiros, Marcel Barbosa [UNESP]. "Avaliação comparativa do sêmen ovino refrigerado nos meios Glicina-Gema-Leite, Glicina-Gema purificada-Leite e Glicina-extrato de lipoproteínas de baxa densidade-Leite." Universidade Estadual Paulista (UNESP), 2011. http://hdl.handle.net/11449/98149.

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Made available in DSpace on 2014-06-11T19:29:14Z (GMT). No. of bitstreams: 0 Previous issue date: 2011-01-29Bitstream added on 2014-06-13T19:17:39Z : No. of bitstreams: 1 falleiros_mb_me_botfmvz.pdf: 753532 bytes, checksum: 09df2201bbfb5625659993b6522a5251 (MD5)<br>Universidade Estadual Paulista (UNESP)<br>Objetivou-se estudar os efeitos do extrato de lipoproteínas de baixa densidade sobre o sêmen ovino durante a refrigeração. Vinte amostras de 5 carneiros foram refrigeradas por 24 e 48 horas na geladeira para refrigeração Minitube, nos meios diluentes Glicina Gema Leite, Glicina Gema purifi

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6

Arman, Chairussyuhur. "Use of compounds of epididymal and plant origin in maintaining viability of ram spermatozoa." Title page, contents and summary only, 1996. http://web4.library.adelaide.edu.au/theses/09PH/09pha727.pdf.

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Bibliography: leaves 267-292. This study aimed at finding better ways of storing ram semen at refrigerator or room temperature with particular reference to ingredients readily available in Indonesia, namely coconut extract and quail egg yolk. Coconut extract showed consistent advantages with regard to sperm motility and quail egg yolk was as effective as hen egg yolk. Investigations were extended to examine storage for subnormal semen such as would be produced during periods of heat stress. Motility was assessed visually and using a Hamilton Thorn semen evaluation apparatus.

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Dirscherl, Friederike Karin Maria [Verfasser]. "Effects of semen collection practices on the bacterial load of stallion semen / Friederike Karin Maria Dirscherl." Hannover : Bibliothek der Tierärztlichen Hochschule Hannover, 2011. http://d-nb.info/1013294599/34.

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8

Gacem, Sabrina. "Computerised analysis of semen in equids." Doctoral thesis, Universitat Autònoma de Barcelona, 2021. http://hdl.handle.net/10803/672020.

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L’enfocament que es proposa en aquesta tesi es basa en el fet que hi ha un buit d’informació sobre l’optimització de l’examen de la solidesa reproductiva juntament amb els protocols d’anàlisi de semen en els equids, tal com es va veure al capítol anterior. A l’ase, no es van definir protocols específics per a l’anàlisi de semen, només per a mostres de sementals on hi ha un acord general sobre el protocol a utilitzar. Quan es comprova el tracte reproductor, s’utilitza una ecografia en mode B com a mètode de diagnòstic fàcil i no invasiu. D’altra banda, es pot utilitzar una ecografia Doppler pol

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9

Mataveia, Gracinda Andre. "Effect of heterologous seminal plasma and semen extenders on motility of frozen-thawed ram sperm." Diss., Pretoria : [s.n.], 2006. http://upetd.up.ac.za/thesis/available/etd-05142008-123139/.

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10

Vogler, Cheryl Jean. "Effects of elevated testicular temperature on viability of cryopreserved semen and morphological characteristics of ejaculated spermatozoa." Thesis, Virginia Tech, 1990. http://hdl.handle.net/10919/42217.

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Two successive ejaculates were collected from six mature Holstein bulls at 3 d intervals for 7 wks. Elevated testicular temperature was induced by complete coverage of the scrotum with insulated material for 48 h. Viability (motility and acrosome integrity) and morphological characteristics of sperm before and after thermal insult were examined. For assessment of results, collection days were grouped: days -6, -3, 0 = Period 1 (d 0 = day of testis coverage after semen collection on that day), days 3, 6, 9 = Period 2 , days 12, 15...39 = Period 3. Semen was cryopreserved on each day of collecti

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11

Botha, Alma Ester. "Effect of the acidic buffer 2-(N-Morpholino) ethanesulfonic acid on frozen-thawed bull semen." Diss., University of Pretoria, 2009. http://hdl.handle.net/2263/22848.

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The aim of the current study was to determine if frozen-thawed bull semen can be treated with the acidic buffer MES (2-[N- morpholino] ethanesulfonic acid) without any detrimental effect on the motility, plasma membrane, acrosomal membrane and longevity of sperm. Frozen bull semen was obtained from a local co-operative. The semen was frozen in 0.25 mL French straws at a concentration of 80 x 106 sperm cells per millilitre. Semen of two different batches from ten bulls of four different breeds was used in this study. Three frozen semen straws of each batch were thawed at 38° C for 25 seconds. T

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12

Samo, Mohammed Uris. "Studies on the preservation of ram semen." Thesis, Bangor University, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.389688.

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13

Naeeni, Mojgan. "Predictive values of semen parameters for fertility." Thesis, University of Sheffield, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.245535.

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Dunphy, Bruce C. "The clinical value of conventional semen analysis." Thesis, University of Aberdeen, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.332394.

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The object of this thesis was to determine the independent predictive value of semen parameters obtained from the conventional analysis of semen by the methods advocated by the World Health Organisation in 1987, and of the descriptive semen categories also advocated by the World Health Organisation in 1987. The laboratory error in assessing sperm motility, density and morphology was quantified, and minimised by examining the predictive value of semen analyses performed by one technician. It was determined whether it is important to employ stringent criteria for recruiting fertile controls, by

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15

Atherton, S. "Semen quality detection using acoustic wave sensors." Thesis, Nottingham Trent University, 2011. http://irep.ntu.ac.uk/id/eprint/233/.

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Artificial insemination (AI) is a widely used part of the modern agricultural industry, with the number of animals inseminated globally being measured in the millions per anum. Crucial to the success of AI is that the sperm sample used is of a high Quality. Two factors which determine the quality of the sample are the number of sperm present and their motility. There are numerous methods used to analyse the quality of a sperm sample, but these are generally laboratory based, expensive and in need of a skilled operator to perform the analysis. It would, therefore be useful to have a simple and

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16

Oosthuizen, Lizle Joann. "Impact of obesity on semen analysis parameters." Master's thesis, University of Cape Town, 2015. http://hdl.handle.net/11427/19888.

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Includes bibliographical references<br>This study aims to address the lack of data on the link between BMI and infertility in the South African population by describing the prevalence of male overweight and obesity in a group of men undergoing infertility investigation, as well as assessing any semen analysis abnormalities in these groups. It also aims to describe how well men can predict their BMI category and determine whether weight loss would be an acceptable part of infertility management in overweight or obese male partners. Beliefs surrounding healthy weight and fertility will also be a

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17

Ahangari, Yousef Jarari. "Cryopreservation of ram semen for artificial insemination." Thesis, Bangor University, 1992. https://research.bangor.ac.uk/portal/en/theses/cryopreservation-of-ram-semen-for-artificial-insemination(25836205-fd80-43ad-a725-ac602fb33b87).html.

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A theoretical study showed that Al can greatly affect the efficiency of sheep breeding schemes provided fertility is maintained at the highest levels. Factors that affect the survival of ram spermatozoa during preservation were studied. A pH range between 6 and 7 was well tolerated. The addition of 4% (v/v) glycerol to the diluted ram semen in Tris buffer lowered the motility and survival of spermatozoa during 5 hours of storage at 30'C. Following insemination of chilled ram semen, with and without glycerol in the diluent, lambing percentages of 59% and 73% respectively were obtained. Ram seme

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18

Gonzáles, Vargas Víctor Efrain. "Efecto de la bulbouretrectomia y frecuencia de colección en las características macro y microscópicas del eyaculado de llama (Lama glama)." Diss., CLICK HERE for online access, 2004. http://contentdm.lib.byu.edu/u?/Benson,6736.

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Thesis (Ing. Zootécnico)--Universidad Católica Boliviana San Pablo, Unidad Académica Campesina Tiahuanaco, Carrera Ingeniería Zootécnica, 2004.<br>Reproduced from copy at BYU's Benson Institute. Includes bibliographical references (leaves [53]-[56]).

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19

Hughes, Ciara Mary. "DNA integrity in human sperm subpopulations prepared for assisted conception techniques." Thesis, Queen's University Belfast, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.324854.

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20

Silveira, Carolina Fernanda. "Determinação do padrão de expressão de receptores de d-manose em espermatozoides de homens ferteis." [s.n.], 2003. http://repositorio.unicamp.br/jspui/handle/REPOSIP/313311.

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Orientador: Paulo Augusto Neves<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Ciencias Medicas<br>Made available in DSpace on 2018-08-03T17:40:04Z (GMT). No. of bitstreams: 1 Silveira_CarolinaFernanda_M.pdf: 803217 bytes, checksum: 0260430f0cf72b3e2acfab59beed51b4 (MD5) Previous issue date: 2003<br>Resumo: Estudos prévios demonstraram que, em mamíferos, a interação entre os gametas, que antecede a fertilização propriamente dita, é mediada por uma glicoproteína, a D-manose. Os óvulos são ricos em D-manose e os espermatozóides apresentam, em sua superfície, recept

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21

Crespilho, André Maciel [UNESP]. "Estudo comparativo de diferentes metodologiasde preservação do sêmen bovino para a utilização e programas de inseminação artificial em tempo-fixo(IATF)." Universidade Estadual Paulista (UNESP), 2010. http://hdl.handle.net/11449/105905.

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Made available in DSpace on 2014-06-11T19:35:10Z (GMT). No. of bitstreams: 0 Previous issue date: 2010-08-26Bitstream added on 2014-06-13T20:46:11Z : No. of bitstreams: 1 crespilho_am_dr_botffmvz.pdf: 1224891 bytes, checksum: 5f6cd3bb0ea028b0690772b9a9bf8493 (MD5)<br>Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)<br>O objetivo do estudo foi comparar a efetividade de três diluidores empregados para criopreservação e refrigeração do sêmen bovino em relação aos padrões de motilidade, integridade de membrana plasmática e acrossomal, índice de peroxidação lipídica e fertilidade nos

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Fernandes, Carlos Eurico dos Santos [UNESP]. "Perfil eletroforético, características estruturais e fertilidade in vitro do sêmen de touros Nelores submetidos à degeneração testicular por insulação." Universidade Estadual Paulista (UNESP), 2005. http://hdl.handle.net/11449/105989.

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Made available in DSpace on 2014-06-11T19:35:12Z (GMT). No. of bitstreams: 0 Previous issue date: 2005Bitstream added on 2014-06-13T18:46:35Z : No. of bitstreams: 1 fernandes_ces_dr_botfmvz.pdf: 1119134 bytes, checksum: 2a9658153aec069a334942b772885d58 (MD5)<br>Universidade Estadual Paulista (UNESP)<br>O presente estudo objetivou identificar o perfil eletroforético seminal, as características do espermograma e fertilidade in vitro, do sêmen de touros proveniente dos períodos pré e pós-indução do processo degenerativo testicular por insulação. Para isso, foram selecionados quatro animais da r

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23

Osuagwuh, Uchebuchi I. "Semen quality and the excretion of lumpy skin disease virus in semen following vaccination and experimental challenge of vaccinated bulls." Diss., University of Pretoria, 2006. http://hdl.handle.net/2263/23607.

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The aim of this study was to determine the efficacy of vaccination in preventing LSDV excretion in semen and negative effects on semen quality. Lumpy skin disease (LSD) is caused by a virus in the genus Capripoxvirus of the family Poxviridae. The virus has been reported to be excreted in the semen of experimental infected nonvaccinated bulls. Nevertheless, vaccination has been the most widely used method to reduce and prevent the spread of the disease. This work was done to determine the efficacy of lumpy skin disease vaccination in preventing the excretion of lumpy skin disease virus (LSDV) i

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Enciso, Hoyos Marco Alonso. "Reproducción en la vicuña macho Vicugna vicugna: evaluación del método de contención química, colección de semen, análisis del eyaculado y biometría testicular." Bachelor's thesis, Universidad Nacional Mayor de San Marcos, 2009. https://hdl.handle.net/20.500.12672/967.

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La vicuña (Vicugna vicugna) es una especie silvestre de Camélido Sudamericano (CSA). Está clasificada en Bajo Riesgo según la IUCN, no obstante, como continúa estando amenazada, se requiere estudios enfocados en su conservación. Una herramienta de conservación es la reproducción asistida, sin embargo, para hacer uso de ella, primero se requiere conocer la fisiología básica de la especie. En ese sentido, el presente estudio tuvo como objetivo desarrollar un protocolo de contención química y colección de semen en vicuñas mediante la técnica de electroeyaculación, así como caracterizar el eyacula

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Díaz, Villegas Hugo. "Evaluación de las características bioquímicas del plasma seminal de alpacas, fresco y post descongelamiento." Bachelor's thesis, Universidad Nacional Mayor de San Marcos, 2014. https://hdl.handle.net/20.500.12672/3771.

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El semen de alpaca post-descongelación ha sido usado para inseminación artificial sin el éxito esperado, a pesar de usar diversos protocolos de criopreservación y criopreservantes para mantenerlo viable por un tiempo prolongado. Sin embargo, para elaborar un buen criopreservante es necesario conocer que parámetros bioquímicos del plasma seminal se ven afectados tras su descongelación. De allí que el objetivo del estudio fue determinar y comparar las características bioquímicas del plasma seminal de alpacas en fresco y post-descongelado. Se realizó en los laboratorios de Farmacología y T

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Stuhtmann, Gesa [Verfasser]. "Density gradient centrifugation of stallion semen / Gesa Stuhtmann." Hannover : Bibliothek der Tierärztlichen Hochschule Hannover, 2011. http://d-nb.info/1019427086/34.

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Oh, Sang Hyon. "Estimation of Genetic Parameters for Boar Semen Traits." NCSU, 2003. http://www.lib.ncsu.edu/theses/available/etd-04182003-114352/.

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During the last half of the 20<sup>th</sup> century, the world pork industry has achieved astonishing developments in pig breeding. Now swine farms are larger, ownership more concentrated, and farms have become more industrialized. Artificial insemination (AI) plays an important role in animal breeding increasing utilization of genetically superior sires. Currently boars selected for commercial use as AI sires are evaluated on grow-finish performance and carcass characteristics. The objectives of this study were to (A) estimate genetic correlations between production and semen traits in the bo

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Poolperm, Pariwat. "Factors Influencing Semen Quality and Fertility in Boars." NCSU, 2001. http://www.lib.ncsu.edu/theses/available/etd-20010831-112730.

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<p><p>POOLPERM, PARIWAT. Factors Influencing Semen Quality and Fertilityin Boars. (Under the direction of Drs.Glen W. Almond and William L. Flowers)<p> The objectives of this researchwere 1) determine the influence of antibiotics on semen quality, 2) determinethe association among insulin-like growth factor I (IGF-I) in seminal plasma,semen quality, and subsequent fertility, and 3) retrospectively study theassociation among semen parameters and sow fertility. In the firststudy, the effects of gentamicin (GM), amikacin (AM), neomycin sulfate(NM), and penicillin-streptomycin (PS) in sem

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Paillard, Marilène. "Preservation of Honey Bee (Apis mellifera L.) Semen." Master's thesis, Université Laval, 2016. http://hdl.handle.net/20.500.11794/27245.

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L’abeille domestique (Apis mellifera Linnaeus) joue un rôle crucial comme pollinisateur dans l’industrie de l’agriculture. Cependant, durant les dernières décennies, une mortalité des colonies d’abeilles a été observée partout à travers le monde. La conservation du sperme d’abeille est un outil efficace pour sauvegarder la diversité génétique. Sa conservation est possible à température pièce, mais la cryoconservation serait une meilleure méthode pour la conservation à long terme. Notre objectif général est de développer une méthode de cryoconservation de la semence d’abeille. L’hypothèse no.1

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Silva, Christina J. "Conception rates of sexed semen in lactating cows/." Click here to view, 2009. http://digitalcommons.calpoly.edu/dscisp/19.

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Thesis (B.S.)--California Polytechnic State University, 2009.<br>Project advisor: Stan Henderson. Title from PDF title page; viewed on Jan. 21, 2010. Includes bibliographical references. Also available on microfiche.

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Welch, Jennifer Lynn. "Semen exosomes: intrinsic inhibitors of HIV-1 infection." Diss., University of Iowa, 2018. https://ir.uiowa.edu/etd/6661.

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Exosomes are cell-derived vesicles that circulate in bio-fluids and enclose cell-associated cargo, producing various consequences in intercellular communication and may contribute to microbial pathogenesis. Exosomes are similar in composition to enveloped viruses, making differentiation between exosomes and enveloped viruses difficult. Yet, exosomes and enveloped viruses may vary considerably in function. Exosomes produced from infected cells may incorporate viral material as they are simultaneously produced with viruses and depending upon the cargo, contribute to disease pathogenesis. Convers

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Gadani, Beatrice <1989&gt. "Methods for improving boar and stallion semen quality." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2018. http://amsdottorato.unibo.it/8386/1/Gadani_Beatrice_tesi.pdf.

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Handling of semen is a very important tool for a successful artificial insemination in both pig and horse farming. One of the main problems during liquid and frozen semen storage is the loss of fertilizing potential mainly due to a sudden reduction of temperature, an excessive production of reactive oxygen species and alterations in the antioxidant defense systems. Supplementation of sperm preparation with different antioxidants gave interesting and promising results and, during recent years, use of plant antioxidants has been gaining the attention of several research groups. Moreover, an inc

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Goldberg, Ana Maria Groehs. "Fatores de risco para a contaminação bacteriana durante a coleta do ejaculado suíno e suas consequências sobre a qualidade das doses inseminantes." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2009. http://hdl.handle.net/10183/16234.

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O objetivo do presente estudo foi verificar a influência de diferentes pontos de risco de contaminação bacteriana durante a coleta do ejaculado suíno e seus efeitos sobre a qualidade da dose inseminante (DI). O experimento foi realizado em quatro centros de difusão genética (CDG), nos quais as coletas dos ejaculados foram observadas buscando possíveis pontos de risco de contaminação. Posteriormente, o sêmen in natura e 2 DIs, provenientes da coleta observada, foram avaliados no que se refere à quantificação bacteriana, morfologia e motilidade espermática e pH. Além do ejaculado, amostras de ág

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Baudi, Daiam Loyola Kampa. "Efeito de dois métodos de resfriamento sobre a funçao espermática in vitro de semen criopreservado de felinos (Leopardus tigrinus, Leopardus pardalis E Felis catus), avaliada através de ensaio competitivo de ligaçao em ovócitos de gata doméstica (Felis." reponame:Repositório Institucional da UFPR, 2005. http://hdl.handle.net/1884/34143.

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A busca de estratégias eficientes para a manutenção de espécies em risco de extinção tem impulsionado a comunidade científica a pesquisar alternativas para a preservação de material genético, com intuito de formação de bancos de genoma e aplicação de biotécnicas reprodutivas. Este estudo teve por objetivo avaliar os efeitos de dois protocolos diferentes de resfriamento pré-congelamento para a criopreservação de sêmen de jaguatirica (n=3), gato-do-mato-pequeno (n=4) e gato doméstíco (n=15). Apenas seis amostras de sêmen de jaguatirica, sete de gato-do-mato-pequeno e treze amostras de gato domés

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Fuverki, Renata Benício Neves [UNESP]. "Padronização de um protocolo para detecção molecular de Leptospira spp. e Brucella spp. em sêmen bovino comercial." Universidade Estadual Paulista (UNESP), 2010. http://hdl.handle.net/11449/94627.

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Made available in DSpace on 2014-06-11T19:27:16Z (GMT). No. of bitstreams: 0 Previous issue date: 2010-06-30Bitstream added on 2014-06-13T20:35:29Z : No. of bitstreams: 1 fuverki_rbn_me_jabo.pdf: 380911 bytes, checksum: 1e3cde0d1d852b172186ddec592ea827 (MD5)<br>Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)<br>Com a crescente disponibilidade das biotécnicas de reprodução animal, o comércio dos produtos envolvidos com essas práticas também está em expansão, oferecendo a possibilidade de melhoria dos índices zootécnicos às produções de bovinos. Porém deve-se levar em cons

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Maia, Fernanda Alves [UNESP]. "Avaliação dos parâmetros seminais de indivíduos inférteis em uso de polivitamínico e polimineral." Universidade Estadual Paulista (UNESP), 2009. http://hdl.handle.net/11449/99216.

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Made available in DSpace on 2014-06-11T19:29:51Z (GMT). No. of bitstreams: 0 Previous issue date: 2009-02-09Bitstream added on 2014-06-13T18:39:54Z : No. of bitstreams: 1 maia_fa_me_botfm.pdf: 761192 bytes, checksum: af7cd1654f8ff045bdb288b848b037dc (MD5)<br>A infertilidade é definida pela inabilidade de engravidar após 12 meses ou mais de coito regular não protegido. O uso de polivitamínico e polimineral parece influenciar na qualidade seminal. Dados da literatura sobre o uso oral isolado ou combinado desses micronutrientes na melhoria dos parâmetros seminais e eventual fertilidade são cont

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Vilakazi, David Mxolisi. "Factors affecting the quality of semen of A.I. dairy bulls in South Africa." Diss., University of Pretoria, 2003. http://hdl.handle.net/2263/27699.

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The primary objective of this research was to study the effects of breed, age, season, and their interactions on semen morphological characteristics. The study was done on 329 bulls (271 Friesland and 58 Jersey) aged 12, 24, 36,48, 60, 72, 84, 96 and> 96 months. The collection of semen was carried out using the artificial vagina method in all four seasons of the year. Spermatozoa were screened for the percentages normal sperm, percentage and total major defects such as knobbed acrosome, pyriform, abnormal lose head, dag defects, nuclear vacuole, degenerative heads, mid-piece reflexes, percenta

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Saravia, Fernando. "Deep freezing of concentrated boar semen for intra-uterine insemination /." Uppsala : Swedish University of Agricultural Sciences, 2004. http://epsilon.slu.se/9815944.pdf.

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Žďárková, Veronika. "Faktory ovlivňující klíčení, vzcházení a mortalitu semen v půdní zásobě u druhu Bromus sterilis L." Doctoral thesis, Česká zemědělská univerzita v Praze, 2015. http://www.nusl.cz/ntk/nusl-259642.

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Bromus sterilis L. (barren brome) spreads rapidly in many European regions. In the Czech Republic, its importance has increased dramatically over the past 10 years. Barren brome is reported as a problem weed in winter crops such as winter wheat, winter barley and oil seed rape, in vineyards and in other cultivated places. Barren brome has been becoming troublesome weed of winter cereals mainly in reduced soil tillage systems. The factors, that are important for its spreading and adaptability under different environmental conditions, are dormancy and germination. Optimal timing for seed germina

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Mancini, Karina Carvalho. "Ultra-estrutura e citoquimica dos espermatozoides em Euptoieta hegesia (Insecta : Lepidoptera) ao longo dos tratos reprodutores masculino e feminino." [s.n.], 2003. http://repositorio.unicamp.br/jspui/handle/REPOSIP/317851.

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Orientador: Mary Anne Heidi Dolder<br>Tese (doutorado) - Universidade Estadual de Campinas, Instituto de Biologia<br>Made available in DSpace on 2018-08-03T17:20:21Z (GMT). No. of bitstreams: 1 Mancini_KarinaCarvalho_D.pdf: 22242865 bytes, checksum: 011013b83d6b4da00716d61fef0eeb42 (MD5) Previous issue date: 2003<br>Resumo: Borboletas e mariposas apresentam um dos casos mais evidentes de polimorfismo espermático, com a produção de dois tipos de espermatozóides: os apirenes e os eupirenes, que diferem em morfologia e função. Estudos ultra-estruturais descreveram a morfologia e organização de

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Zama, Uyra dos Santos. "Estudo estrutural e ultraestrutural dos espermatozoides nas tribos Apini, Bombini, Euglossini e Meliponini (Hymenoptera: Apinae), com considerações filogeneticas." [s.n.], 2003. http://repositorio.unicamp.br/jspui/handle/REPOSIP/317852.

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Orientador: Mary Anne Heidi Dolder<br>Tese (doutorado) - Universidade Estadual de Campinas, Instituto de Biologia<br>Made available in DSpace on 2018-08-03T17:19:44Z (GMT). No. of bitstreams: 1 Zama_UyradosSantos_D.pdf: 14815313 bytes, checksum: e7f1b0ffc689c69a7c9c5871c7f60bc4 (MD5) Previous issue date: 2003<br>Resumo: O termo "espermiocladística" defini a utilização de características estruturais e ultra-estruturais dos espermatozóides na composição de matrizes de caracteres para estudos filogenéticos. Estudos realizados, inclusive com insetos, têm fornecido dados consistentes e úteis para

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Waite, Jessica Arlene. "Cushioned centrifugation of stallion semen: factors impacting equine sperm recovery rate and quality." Thesis, Texas A&M University, 2007. http://hdl.handle.net/1969.1/85886.

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Centrifugation of stallion semen is an integral part of the cryopreservation procedure, primarily allowing for the concentration of sperm and removal of seminal plasma. In addition, centrifugation is required for maximizing spermatozoal quality in semen from some stallions subjected to cooled transport, because of the detrimental effects of long-term exposure to high levels of seminal plasma. The centrifugation process, however, has potential deleterious effects, including reduction in sperm quality as well as loss of sperm numbers. Since centrifugation plays such a crucial role in semen proce

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Rocha, Aline Silva [UNESP]. "Efeito da adição da asolctina e fosfatidilcolina de soja em meio à base de gema de ovo sobre os parãmetros espermáticos e fertilidade de sêmen congelado de garanhões." Universidade Estadual Paulista (UNESP), 2012. http://hdl.handle.net/11449/98155.

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Made available in DSpace on 2014-06-11T19:29:15Z (GMT). No. of bitstreams: 0 Previous issue date: 2012-07-19Bitstream added on 2014-06-13T19:59:04Z : No. of bitstreams: 1 rocha_as_me_botfmvz.pdf: 334752 bytes, checksum: 8483e7af4f994ca7fc71b7f2189b4764 (MD5)<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)<br>Fundação para o Desenvolvimento da UNESP (FUNDUNESP)<br>O objetivo do presente estudo foi avaliar o efeito da adição da asolctina de soja ou da fosfatidilcolina de soja em diluente à base de gema de ovo sobre os parâmetros espermáticos e índices de fertilidade de s

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Lavara, García Raquel. "Genetics of fresh and frozen-thawed semen traits and their relationship with growth rate in rabbits." Doctoral thesis, Universitat Politècnica de València, 2013. http://hdl.handle.net/10251/31657.

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Se utilizarán eyaculados procedentes de machos de la línea R (línea de conejos seleccionada por velocidad de crecimiento durante el periodo de engorde)alojados en diferentes centros de inseminación artificial. Una vez recuperados los eyaculados se procederá a su valoración y una muestra de todos ellos será crioconservada. La calidad seminal será de nuevo valorada tras el proceso de congelación. Junto con los anàlisis seminales se utilizarán los datos de crecimiento y pedigree de los machos y de todos los animales de la línea R desde su fundación para estimar por un lado los parámetros genético

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Zhao, Jie. "Chromatographic analysis of active components in Semen Ziziphi Spinosae." Thesis, University of Macau, 2005. http://umaclib3.umac.mo/record=b1445365.

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Bryan, Tina Michelle. "Testicular function in normal and poor semen quality stallions." Texas A&M University, 2004. http://hdl.handle.net/1969.1/3253.

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The chromosomal location of endocrine genes was established, and relationships between expression of specific endocrine genes and measures of testis function in normal and poor semen quality stallions was assessed. Consensus primer sequences for glucocorticoid receptor (GR) and luteinizing hormone receptor (LHR) were used to screen the CHORI-241 equine bacterial artificial chromosome (BAC) library. The identity of PCR-positive BAC clones was confirmed by sequencing. Verified BACs were mapped to horse metaphase chromosome spreads by fluorescence in situ hybridization (FISH). The BACs containing

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Brock, M. Kelly. "Cryopreservation of semen of the American kestrel Falco sparverius." Thesis, McGill University, 1986. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=65449.

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Medrano, Hernandez Jose Alfredo. "The importance of individual variation in Boar semen cryopreservation." Thesis, Royal Veterinary College (University of London), 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.299995.

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Flint, Margot. "Relationship between semen viscosity and male genital tract infections." Thesis, Stellenbosch : Stellenbosch University, 2012. http://hdl.handle.net/10019.1/20167.

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Thesis (MScMedSc)--Stellenbosch University, 2012.<br>ENGLISH ABSTRACT: The basic semen analysis plays a pivotal role in the diagnosis of male infertility and makes a significant contribution to the diagnostic process in andrology, gynecology and clinical urology. In 1902, the man considered to be ―the founding father of modern andrology‖ Edward Martin, proposed that an analysis of a semen sample should be incorporated into all infertility assessments. Following this suggestion in 1956, the scientist John MacLeod advanced the basic semen analysis from beyond a mere observation and introduced th

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Chalupová, Lenka. "Stanovení mikroflóry osiva vybraných druhů zeleniny a možnosti ochrany." Master's thesis, 2017. http://www.nusl.cz/ntk/nusl-430092.

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The aim of this diploma thesis is assessing the determination and evaluation of pathogens species spectrum in carrot (Daucus carota), parsley (Petroselinum crispum) and pepper (Capsicum annum) seeds. The microflora was determined in laboratory conditions. The surface disinfected seeds and non-disinfected seeds were cultivated on culture medium PDA and filter paper. The level of bacterial and yeast contamination was low. The major part of pathogenswere fungi pathogens. The most often found pathogens were species from Alternaria and Cladosporium genus. The species spectrum was not different betw

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