Download or read book Molecular Biology of The Cell written by Bruce Alberts and published by . This book was released on 2002 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Functional Anatomy of the Spermatozoon written by Björn A. Afzelius and published by Elsevier. This book was released on 2017-01-31 with total page 406 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Functional Anatomy of the Spermatozoon is the 23rd volume of the series Wenner-Gren Center International Symposium Series, documenting the proceedings of the Second International Symposium on Comparative Spermatology, held in August 1973. This volume mainly focuses on the understanding of the early events at fertilization and the preliminaries of this biological process. This text specifically tackles the sperm at fertilization of lower animals and mammals, sperm motility and diversity, and spermatogenesis. This book concludes with discussions on capacitation and maturation of mammalian spermatozoa. This compendium will be valuable to morphologists, physiologists, immunologists, and biochemists, as well as to academicians interested in the study of functional anatomy of the spermatozoon.
Download or read book Spermatophores written by T. Mann and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 233 pages. Available in PDF, EPUB and Kindle. Book excerpt: Physiology and biochemistry of male reproductive function and semen became the main area of my research in 1944, after my attention was finally diverted frorp. animal cells in general, to mammalian spermatozoa specifically~ Ever since, the interest has remained largely focussed on reproductive probletns in mammals, the work continuing mostly at the University of Cambridge, where I was privileged to hold also the Marshall Walton Professorship in Physiology of Reproduction. This work led to the publication of three books, The Biochemistry of Semen (Methuen 1954), The Biochemistry of Semen and of the Male Reproductive Tract (Methuen 1964) and lately, in co authorship with my wife, Dr. Cecilia Lutwak-Mann, Male Re productive Function and Semen - Themes and Trends in Phys iology, Biochemistry and Investigative Andrology (Springer Verlag 1981). In 1960, thanks to the Lalor Foundation, I was able to avail myself for the first time of a chance to visit the Marine Biological Laboratory at Woods Hole and there to take part in a study of reproduction in marine animals. Ever since, first as Visiting Professor of Biology at the State University of Florida, and later as the Walker Ames Professor and frequent visitor to the Department of Zoology at the University of Washington in Seattle, it has been my good fortune to sustain this pew interest and to pursue it further.
Download or read book Human Spermatozoa written by Thomas Lejeune and published by Nova Biomedical. This book was released on 2010-01-01 with total page 545 pages. Available in PDF, EPUB and Kindle. Book excerpt: Spermatozoa is the basic human male germ cell. This gametocyte plays an important role in fertilisation. In the past five years, new improvements in diagnosis have allowed us to assess male fertility potential with a new perspective studying with demonstrated role in sperm physiology. Furthermore, it is demonstrated that infertile men have high levels of sperm DNA damages and a small percentage of spermatozoa from fertile men also possess detectable levels of DNA damage. This book examines several of the factors that may be involved in sperm chromatin and DNA anomalies, including intra and extra testicular factors. Furthermore, sperm capacitation is a complex physiological process that involves biochemical, biophysical, molecular and metabolic modifications of all sperm domains. Some important events related to the capacitation process of sperm is examined as well. The biological role of the proteasome during sperm capacitation and the acrosome reaction and its relationship with protein phosphorylation and dephosphorylation during these processes is explored as well. Other chapters in this book highlight the pivotal role of transmission electron microscopy (TEM) analysis in the diagnosis of human sperm pathologies, the barrier methods currently available to men for regulating their fertility, a discussion of the current understanding of gene transfer to the testis, a new perspectives for the study of mycoplasmal and chlamydial infections of human spermatozoa and a discussion of the present current knowledge on the mechanisms, molecules and cell signalling involved in sperm activating ability.
Download or read book Abnormal Morphology of Bovine Spermatozoa written by A. D. Barth and published by Wiley-Blackwell. This book was released on 1991-01-15 with total page 285 pages. Available in PDF, EPUB and Kindle. Book excerpt: Classifies and interprets bovine sperm defects. Includes 155 photomicrographs.
Download or read book Spermatozoa written by Rosaria Meccariello and published by . This book was released on 2018 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Spermatozoa written by Rosaria Meccariello and published by BoD – Books on Demand. This book was released on 2018-06-13 with total page 251 pages. Available in PDF, EPUB and Kindle. Book excerpt: Spermatozoa, the haploid male gametes, are highly specialized cells capable to fertilize eggs in order to produce diploid zygote. The biogenesis of spermatozoa requires finely modulated occurrence of mitotic, meiotic, and differentiation events. Hence, the production of high-quality spermatozoa impacts fertilization with outcomes on the health of the offspring. This book provides a comprehensive overview on the biogenesis, maturation, functions and activities of spermatozoa in both physiological conditions and infertility. Particular attention has been addressed to the impact of environment on sperm quality and to the appropriate selection of high-quality spermatozoa for in vitro fertilization. Taken together, this book targets a wide audience of basic and clinical scientists, teachers and students, and offers a better understanding of spermatozoa health and disease.
Download or read book Biology of Spermatogenesis and Spermatozoa in Mammals written by Sardul S. Guraya and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 441 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Sperm Membrane Channels Receptors and Kinematics Using boar spermatozoa for drug toxicity screening written by Alejandro Vicente Carrillo and published by Linköping University Electronic Press. This book was released on 2016-10-11 with total page 65 pages. Available in PDF, EPUB and Kindle. Book excerpt: Internal fertilization usually implies that a spermatozoon, with intact attributes for zygote formation, passes all hurdles during its transport through the female genitalia and reaches the oocyte. During this journey, millions to billions of other spermatozoa perish. Spermatozoa are highly differentiated motile cells without synthetic capabilities. They generate energy via glycolysis and oxidative phosphorylation to sustain motility and to maintain the stability and functionality of their plasma membrane. In vivo, they spend their short lifespan bathing in female genital tract fluids of different origins, or are in vitro exposed to defined media during diverse sperm handling i.e. extension, cryopreservation, in vitro fertilization, etc. Being excitable cells, spermatozoa respond in vivo to various stimuli during pre-fertilization (capacitation, hyperactivation, oocyte location) and fertilization (acrosome reaction, interaction with the oocyte) events, mediated via diverse membrane ion-conducting channels and ligand-gated receptors. The present Thesis has mapped the presence and reactivity (sperm intactness and kinematics) of selected receptors, water and ion channels in ejaculated boar spermatozoa. The final aim was to find a relevant alternative cell type for in vitro bioassays that could ease the early scrutiny of candidate drugs as well as decreasing our needs for experimental animals according to the 3R principles. Spermatozoa are often extended, cooled and thawed to warrant their availability as fertile gametes for breeding or in vitro testing. Such manipulations stress the cells via osmotic variations and hence spermatozoa need to maintain membrane intactness by controlling the exchange of water and the common cryoprotectant glycerol, via aquaporins (AQPs). Both AQPs-7 and -9 were studied for membrane domain changes in cauda- and ejaculated spermatozoa (un-processed, extended, chilled or frozen-thawed). While AQP-9 maintained location through source and handling, thawing of ejaculated spermatozoa clearly relocated the labelling of AQP-7, thus appearing as a relevant marker for non-empirical studies of sperm cryopreservation. Alongside water, spermatozoa interact with calcium (Ca2+) via the main Ca2+ sperm channel CatSper. Increments in intracellular Ca2+ initiate motility hyperactivation and the acrosome reaction. The four subunits of the CatSper channel were present in boar spermatozoa, mediating changes in sperm motility under in vitro capacitation-inducing conditions (increased extracellular Ca2+ availability and bicarbonate) or challenge by the CatSper antagonists mibefradil and NNC 55-0396. Uterine and oviduct fluids are richest in endogenous opioids as ?-endorphins during mating and ovulation. Both ?- and ?- opioid receptors were present in boar spermatozoa modulating sperm motility, as in vitro challenge with known agonists (?: morphine; ?: DPDPE and ?: U 50488) and antagonists (?: naloxone; ?: naltrindole and ?: nor-binaltrorphimine) showed that the ?-opioid receptor maintained or increased motility while the ?-opioid receptor mediated decreased motility over time. Finally, boar spermatozoa depicted dose-response effects on sperm kinematics and mitochondrial potential following in vitro challenge with 130 pharmacological drugs and toxic compounds as well as with eight known mito-toxic compounds. In conclusion, boar spermatozoa expressing functional water (AQPs-7 and -9) and ion (CatSper 1-4) channels as well as ?- and ?-opioid receptors are able to adapt to stressful environmental variations, capacitation and pharmacological compounds and drug components. Ejaculated sperm suspensions are easily and painlessly obtained from breeding boars, and are suitable biosensors for in vitro drug-induced testing, complying with the 3R principles of reduction and replacement of experimental animals, during early toxicology screening.
Download or read book The Ultrastructure and Phylogeny of Insect Spermatozoa written by Barrie Gillean Molyneux Jamieson and published by CUP Archive. This book was released on 1987-08-20 with total page 342 pages. Available in PDF, EPUB and Kindle. Book excerpt: This 1987 book examines the structure, as seen by the scanning and transmission electron microscopes, of the spermatozoa of insects, centipedes, millipedes and onychophorans.
Download or read book Sperm Differentiation and Spermatozoa Function Mechanisms Diagnostics and Treatment written by Tomer Avidor-Reiss and published by Frontiers Media SA. This book was released on 2020-05-22 with total page 290 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Office Andrology written by Phillip E. Patton and published by Springer Science & Business Media. This book was released on 2007-11-05 with total page 309 pages. Available in PDF, EPUB and Kindle. Book excerpt: A comprehensive and practice-oriented resource guide to currently available diagnostic and treatment options for male infertility disorders. Topics covered range from basic sperm biology and male reproductive endocrinology, to immunology, specialized sperm testing, and the genetic background to male infertility. The authors emphasize the investigation, diagnostic testing, and management of the infertile male, but also examine such timely issues as gender selection, HIV discordance couples, and posthumous reproduction. Other topics of interest include laboratory accreditation, vasectomy reversal, ethical and legal considerations of donor insemination, optimizing success in a donor insemination program, and strategic therapies for ejaculatory disorders and erectile dysfunction in infertile men.
Download or read book Male Reproductive Function and Semen written by T. Mann and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 507 pages. Available in PDF, EPUB and Kindle. Book excerpt: To present a coherent and meaningful survey of scientific research endeavour in an area that has expanded as fast as physiology and biochemistry of reproduction in the male is no mean task these days. No less prodigious than the growth of knowledge of male reproductive function has been the rate at which the outpouring of publications on this subject has continued since the appearance of 'The Biochemistry of Semen and of the Male Reproductive Tract' in 1964. Since cyclopaedic treatment of this vast literature did not appeal to us, we have made no attempt either to rehash the material contained in that book or to enlarge the bibliography beyond the nearly 3500 references included in the present treatise. At the same time, whilst writing, we felt strongly that to advance, it is necessary to understand the past, and for this reason we have not hesitated to refer (especially in the introductory chapter) to a number of those fundamental early discoveries in which today's knowledge is deeply and firmly rooted.
Download or read book Gametes The Spermatozoon written by Jurgis Gediminas Grudzinskas and published by Cambridge University Press. This book was released on 1995-09-07 with total page 318 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is detailed, comprehensive and timely account of the spermatozoon and its reproductive function.
Download or read book Bovine Reproduction written by Richard M. Hopper and published by John Wiley & Sons. This book was released on 2014-08-18 with total page 2735 pages. Available in PDF, EPUB and Kindle. Book excerpt: Bovine Reproduction is a comprehensive, current reference providing information on all aspects of reproduction in the bull and cow. Offering fundamental knowledge on evaluating and restoring fertility in the bovine patient, the book also places information in the context of herd health where appropriate for a truly global view of bovine theriogenology. Printed in full color throughout, the book includes 83 chapters and more than 550 images, making it the most exhaustive reference available on this topic. Each section covers anatomy and physiology, breeding management, and reproductive surgery, as well as obstetrics and pregnancy wastage in the cow. Bovine Reproduction is a welcome resource for bovine practitioners, theriogenologists, and animal scientists, as well as veterinary students and residents with an interest in the cow.
Download or read book The Possibility of Sex Control by Artificial Insemination with Centrifuged Spermatozoa written by Jay Laurence Lush and published by . This book was released on 1925 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Studies in the Physiology of Spermatozoa written by Edwin Joseph Cohn and published by . This book was released on 1918 with total page 62 pages. Available in PDF, EPUB and Kindle. Book excerpt:
