Добірка наукової літератури з теми "Spermatozoa Physiology"

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Статті в журналах з теми "Spermatozoa Physiology"

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Aitken, RJ. "Free radicals, lipid peroxidation and sperm function." Reproduction, Fertility and Development 7, no. 4 (1995): 659. http://dx.doi.org/10.1071/rd9950659.

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The cellular generation of reactive oxygen species was first observed in mammalian spermatozoa in the late 1940s. The field then remained dormant for 30 years until Thaddeus Mann and Roy Jones published a series of landmark papers in the 1970s in which the importance of lipid peroxidation as a mechanism for damaging mammalian spermatozoa was first intimated. The subsequent demonstration that human spermatozoa produce reactive oxygen species and are susceptible to peroxidative damage has triggered intense interest in the role of oxidative stress in the aetiology of male infertility. Moreover, d
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2

Ishijima, S., M. S. Hamaguchi, M. Naruse, S. A. Ishijima, and Y. Hamaguchi. "Rotational movement of a spermatozoon around its long axis." Journal of Experimental Biology 163, no. 1 (February 1, 1992): 15–31. http://dx.doi.org/10.1242/jeb.163.1.15.

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The rotational movement of a spermatozoon around its longitudinal axis was investigated by two methods: by observing a spermatozoon attached vertically to a coverslip by the tip of its head, and by observing a spermatozoon freely swimming in a medium by means of ‘double-focal microscopy’, which yielded simultaneous images at two different focal planes. Similar results were obtained by these two methods. Sea urchin, starfish, medaka, human, golden hamster and bull spermatozoa rolled in both clockwise and counterclockwise directions, although there was a large difference in the proportion of spe
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Rajalakshmi, M. "Physiology of the epididymis and spermatozoa." Journal of Biosciences 7, no. 2 (March 1985): 191–95. http://dx.doi.org/10.1007/bf02703587.

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Seubparu, Lucksanaveejit, Mingkwan Nipitwathanaphon, Wijit Wisoram, David Merritt, and Lertluk Ngernsiri. "Morphology of testes, spermatogenesis, sperm bundles, and spermatozoa ofKerria chinensis(Hemiptera: Kerriidae)." Canadian Entomologist 150, no. 5 (September 19, 2018): 594–609. http://dx.doi.org/10.4039/tce.2018.39.

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AbstractThe filamentous spermatozoa of scale insects (Hemiptera) are highly modified compared with those of typical insects. Here, we investigate the morphology of the testes, sperm bundles, spermatozoa, and spermatogenesis of the winglessKerria chinensis(Mahdihassan) (Hemiptera: Kerriidae), a shellac-producing scale insect. Each testis contains two antiparallel groups of several hundred syncytial sperm bundles. In each spermatocyte cyst, 16 primary spermatocytes divide via inverted meiosis, resulting in 16 quadrinucleated spermatids, each having two euchromatic and two heterochromatic nuclei.
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Wayman, C., S. Phillips, C. Lunny, T. Webb, L. Fawcett, R. Baxendale, and G. Burgess. "Phosphodiesterase 11 (PDE11) regulation of spermatozoa physiology." International Journal of Impotence Research 17, no. 3 (March 31, 2005): 216–23. http://dx.doi.org/10.1038/sj.ijir.3901307.

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Seftel, Allen D. "Phosphodiesterase 11 (PDE11) Regulation of Spermatozoa Physiology." Journal of Urology 174, no. 3 (September 2005): 1043–44. http://dx.doi.org/10.1016/s0022-5347(01)68504-5.

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Chaykin, S. "Non-fertilizing spermatozoa: Initiators of gestational physiology." Medical Hypotheses 23, no. 2 (June 1987): 153–55. http://dx.doi.org/10.1016/0306-9877(87)90151-4.

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Wang, Xiaona, Hua Qian, Xiaoyuan Huang, Jinjing Li, Jiayan Zhang, Nan Zhu, Hua Chen, et al. "UCP2 Mitigates the Loss of Human Spermatozoa Motility by Promoting mROS Elimination." Cellular Physiology and Biochemistry 50, no. 3 (2018): 952–62. http://dx.doi.org/10.1159/000494479.

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Background/Aims: To demonstrate the function of uncoupling protein 2 (UCP2) in the regulation of human spermatozoa motility. Methods: Semen samples were collected from donors with either normal spermatozoa motility (normospermia [NS]) or poor spermatozoa motility (asthenospermia [AS]). UCP2 protein in spermatozoawas quantified by Western blotting. The level of mitochondrial reactive oxygen species (mROS) was evaluated by MitoSOX Red. The activity of mitochondrial membrane potential (MMP) in spermatozoa was evaluated by a JC-1 assay and the ATP level was monitored by a luciferin-luciferase assa
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O’Flaherty, Cristian. "Peroxiredoxin 6: The Protector of Male Fertility." Antioxidants 7, no. 12 (November 24, 2018): 173. http://dx.doi.org/10.3390/antiox7120173.

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The spermatozoon is a terminal cell with the unique purpose of delivering the paternal genome to the oocyte during fertilization. Once spermatozoa enter into the female reproductive tract, they count on only the antioxidant protection that they received during spermatogenesis and epididymal maturation. Peroxiredoxins (PRDXs), particularly PRDX6, are important players in the antioxidant protection and regulation of reactive oxygen species (ROS) levels in spermatozoa. PRDX6, through its peroxidase and calcium-independent phospholipase A2 activities, plays a major role in the regulation of ROS to
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Fernández-Alegre, Estela, Indira Álvarez-Fernández, Juan Carlos Domínguez, Adriana Casao, and Felipe Martínez-Pastor. "Melatonin Non-Linearly Modulates Bull Spermatozoa Motility and Physiology in Capacitating and Non-Capacitating Conditions." International Journal of Molecular Sciences 21, no. 8 (April 13, 2020): 2701. http://dx.doi.org/10.3390/ijms21082701.

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Bull spermatozoa physiology may be modulated by melatonin. We washed ejaculated spermatozoa free of melatonin and incubated them (4 h, 38 °C) with 0-pM, 1-pM, 100-pM, 10-nM and 1-µM melatonin in TALP-HEPES (non-capacitating) and TALP-HEPES-heparin (capacitating). This range of concentrations encompassed the effects mediated by melatonin receptors (pM), intracellular targets (nM–µM) or antioxidant activity (µM). Treatment effects were assessed as motility changes by computer-assisted sperm analysis (CASA) of motility and physiological changes by flow cytometry. Melatonin effects were more evide
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Дисертації з теми "Spermatozoa Physiology"

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Brooks, Nicole Lisa. "Apoptotic markers in ejaculated human spermatozoa." Thesis, University of the Western Cape, 2005. http://etd.uwc.ac.za/index.php?module=etd&amp.

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The role of male germ cell death in spermatogenesis is an important one as it removes dysfunctional or genetically damaged germ cells and is necessary to maintain an optimal germ cell to Sertoli cell ratio. The formation of the bloodtestis barrier requires the elimination of excessive germ cells and a surge of germ cell apoptosis occurs prior to puberty regulating the ratio of germ cells to Sertoli cells. The aim of this study was to evaluate the presence of four apoptotic markers on sperm from patients with various grades of fertility using flow cytometry. Furthermore, any correlations betwee
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Crosby, John. "Interactions between prostaglandins, phospholipids and spermatozoa." Thesis, University of Edinburgh, 1988. http://hdl.handle.net/1842/18806.

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Murray, George M. "Acrosome size and kinematics of human spermatozoa." Thesis, Link to the online version, 2007. http://hdl.handle.net/10019/1131.

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Downie, Sarah Elizabeth. "Detection of chromosomes and chromosomal abnormalities in human sperm." Title page, contents and overview only, 1999. http://web4.library.adelaide.edu.au/theses/09PH/09phd751.pdf.

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Bibliography: leaves 135-151. A study of chromosomal abnormalities and the localisation of chromosomes in human sperm, especially from men with TSD, using fluorescence in situ hybridization (FISH). The project entailed: 1. development of reliable FISH protocols, 2. determination of basline frequencies of aneuploidy, 3. analysis of chromosomal abnormalities in men with severe TSD and 4. assessment of the localisation of individual chromosomes within the sperm head.
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Burley, Lisa Marie. "The Effects of Miticides on the Reproductive Physiology of Honey Bee (Apis mellifera L.) Queens and Drones." Thesis, Virginia Tech, 2007. http://hdl.handle.net/10919/34584.

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The effects of miticides on the reproductive physiology of queens and drones were examined. The first study examined the effects of Apistan (fluvalinate), Check Mite+ (coumaphos), and Apilife VAR (74% thymol) on sperm production and viability in drones. Drones from colonies treated with each miticide were collected at sexual maturity. Sperm production was determined by counting the number of sperm in the seminal vesicles. Sperm for viability assays was analyzed by dual fluorescent staining. Apilife VAR and coumaphos significantly lowered (P<0.0001) sperm production and coumaphos treatments cau
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Van, Der Linde Michelle. "Gender selection: separation techniques for X- and Y-chromosome bearing human spermatozoa." Thesis, Stellenbosch : Stellenbosch University, 2013. http://hdl.handle.net/10019.1/85629.

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Thesis (MScMedSc)-- Stellenbosch University, 2013.<br>ENGLISH ABSTRACT: Preconceptual sex selection is an ethically justifiable process whereby X- and Y-chromosome bearing spermatozoa are isolated prior to fertilization of the oocyte in order to generate either a male or a female offspring. Although various separation techniques are available, none can guarantee 100% accuracy. There are various physiological differences between X- and Y-chromosome bearing spermatozoa which can be used to separate these two populations of sperm. For the purpose of this study, X- and Y-chromosome bearing sperma
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Rolke, Kristin Rose. "Localization of the CatSper1 protein and induction of hyperactivated-like motility in equine spermatozoa." [College Station, Tex. : Texas A&M University, 2008. http://hdl.handle.net/1969.1/ETD-TAMU-3255.

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Aboua, Yapo Guillaume. "The impact of organic hydroperoxides and a red palm oil supplemented diet on spermatogenesis, sperm function and sperm apoptosis." Thesis, Cape Peninsula University of Technology, 2009. http://hdl.handle.net/20.500.11838/1523.

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Thesis (DTech (Biomedical Technology))--Cape Peninsula University of Technology, 2009<br>Many environmental, physiological, and genetic factors have been shown to impair sperm function through oxidative damage. Oxidative stress (OS) arises as a consequence of excessive reactive oxygen species (ROS) production and/or impaired antioxidant defence mechanisms. The decline in male reproductive health generated considerable public and scientific concerns about the possible role of environmental contaminants. A better understanding of how OS affects sperm function will be beneficial as it might help
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Hadjisavas, Michael. "Induction of mitogenesis and cell-cell adhesion by porcine seminal plasma." Title page, contents and abstract only, 1992. http://web4.library.adelaide.edu.au/theses/09PH/09phh1293.pdf.

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Includes list of publications by the author. Includes bibliographical references (leaves 103-123) Evaluates the nature of the interactions occurring between semen and cells of the uterus that occur following mating in pigs. Describes a novel ability of porcine seminal plasma to induce dose dependent cell-cell adhesion and mitogenesis amongst peripheral blood lymphocytes in vitro.
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Gwayi, Noluzuko. "The effects of melatonin on the testis, epididymis and sperm physiology of the Wistar rat." Thesis, Rhodes University, 2001. http://hdl.handle.net/10962/d1005366.

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Melatonin is a product of the pineal gland and is postulated to play an antigonadotropic role in the reproductive system of mammals. The reproductive system of non-seasonally breeding mammals is believed to be not as responsive to melatonin treatment as that of seasonally breeding mammals. Recently, there has been increasing support from in vivo and in vitro studies, for the hypothesis that melatonin has negative effects on sperm physiology, especially on sperm motility. High and/or low seminal concentrations of melatonin have been associated with abnormalities in human sperm motility and conc
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Книги з теми "Spermatozoa Physiology"

1

Lejeune, Thomas. Human spermatozoa: Maturation, capacitation and abnormalities. New York: Nova Biomedical Books, 2010.

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2

Tibary, A. Theriogenology in Camelidae: Anatomy, physiology, pathology and artificial breeding. Rabat, Morocco: Actes éditions, Institut agronomique et vétérinaire Hassan II, 1997.

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3

Paul, Moses. Actions of pentoxifylline on spermatozoa kinematics: The acrosome reaction and sperm-zona interaction. Uxbridge: Brunel University, 1994.

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4

Gagnon, Claude, 1950 Jan. 12-, ed. Controls of sperm motility: Biological and clinical aspects. Boca Raton, Fla: CRC Press, 1990.

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5

Talebi, Ali Reza. Sperm nuclear maturation: A basic and clinical approach. Hauppauge, N.Y: Nova Science Publishers, 2011.

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Patrick, Fénichel, and Parinaud Jean, eds. Human sperm acrosome reaction: Proceedings of the international symposium on "Human sperm acrosome reaction, physiological and pharmacological induction and transduction pathways", held in Collioure, France, 7-9 September 1995 = Réaction acrosomique du spermatozoïde humain : actes du symposium international sur "La réaction acrosomique de spermatozoïde humain mécanismes d'induction physiologique et pharmacologique et voies de transmission du signal", Collioure, France, 7-9 septembre 1995. Montrouge, France: John Libbey Eurotext, 1995.

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European Workshop on Molecular and Cellular Endocrinology of the Testis. (4th 1986 Capri, Italy). Molecular and cellular endocrinology of the testis: Proceedings of the IV European Workshop on Molecular and Cellular Endocrinology of the Testis, Capri, Italy, 9-12 April 1986. Edited by Stefanini Mario 1916-. Amsterdam: Excerpta Medica, 1986.

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8

author, Woodward Bryan, ed. Male infertility: Sperm diagnosis, management and delivery. London: JP Medical Publishers, 2014.

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9

D, Glover Timothy, and Barratt C. L. R, eds. Male fertility & infertility. Cambridge, UK: Cambridge University Press, 1999.

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10

Heide, Schatten, and Schatten Gerald, eds. The Cell biology of fertilization. San Diego: Academic Press, 1989.

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Частини книг з теми "Spermatozoa Physiology"

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EDDY, E. "The Spermatozoon." In Knobil and Neill's Physiology of Reproduction, 3–54. Elsevier, 2006. http://dx.doi.org/10.1016/b978-012515400-0/50006-3.

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Toshimori, Kiyotaka, and Edward M. Eddy. "The Spermatozoon." In Knobil and Neill's Physiology of Reproduction, 99–148. Elsevier, 2015. http://dx.doi.org/10.1016/b978-0-12-397175-3.00003-x.

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Huang, Zhongwei. "REPRODUCTIVE PHYSIOLOGY OF THE HUMAN SPERMATOZOON AND OOCYTE." In Integrated Approach to Obstetrics and Gynaecology, 177–82. WORLD SCIENTIFIC, 2016. http://dx.doi.org/10.1142/9789813108561_0013.

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Houda, Amor, Shelko Nyaz, Bakry Mohamed Sobhy, Almandouh Hussein Bosilah, Micu Romeo, Jankowski Peter Michael, and Hammadeh Mohamad Eid. "Seminiferous Tubules and Spermatogenesis." In Male Reproductive Anatomy. IntechOpen, 2022. http://dx.doi.org/10.5772/intechopen.98917.

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One of the major concerns of the world health community is the infertility. The definition of infertility according to the World Health Organization (WHO) and the American Society for Reproductive Medicine (ASRM) is the inability of a healthy couple to achieve a conception after one year of regular, unprotected intercourse. Fertility complications affect seven percent of the male. The causes of infertility were divided to non-obstructive and obstructive. But, in almost 75% of male infertility cases are idiopathic with predominance of the genetic abnormalities. Numerical or structural chromosomal abnormalities are considered as genetic abnormalities that occur during the meiotic division in spermatogenesis. These abnormalities get transferred to the Offspring, which affects the normal and even the artificial conception. In the human reproduction, sperm cells are considered as a delivery vehicle for the male genetic material packed in chromosomes, which are composed of nearly 2-meter Deoxyribonucleic acid (DNA) molecule and their packaging proteins. This chapter points to grant a summarized description of individual components of the male reproductive system: the seminiferous tubule and spermatogenesis. Here, we describe step by step the structure of the testis seminiferous tubule and what occurs inside these tubules like cell communication and germ cell development from spermatogonia until spermatozoon. This book chapter is very useful for the biologists and physicians working in Assisted reproduction field to understand the physiology and pathology of spermatogenesis.
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Wilding, Martin, Gianfranco Coppola, Giuseppe Coppola, and Giusy Esposito. "The Physiology of the Spermatozoon and the Use of Digitally-enhanced Sperm Analysis in Predicting Pregnancy after Intrauterine Insemination." In Intrauterine Insemination, 313. Jaypee Brothers Medical Publishers (P) Ltd., 2014. http://dx.doi.org/10.5005/jp/books/12299_27.

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Тези доповідей конференцій з теми "Spermatozoa Physiology"

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Selviana Joni, Maria, Paulus Liben, and Hermanto Tri Joewono. "The Effect of Mozart’s Music on Mus Musculus Balb/C Spermatozoa’s Quantity and Motility Exposed by Lead Acetate." In Surabaya International Physiology Seminar. SCITEPRESS - Science and Technology Publications, 2017. http://dx.doi.org/10.5220/0007335601980200.

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