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  • Male rat infertility induction/spermatozoa and

    Cited by: 10
  • Sorbitol metabolism in spermatozoa Proceedings of

    Sorbitol dehydrogenase, the enzyme responsible for the reversible oxidoreduction of sorbitol to fructose in ram spermatozoa, was prepared in a soluble and highly active form, by grinding sperm with lavigated aluminium oxide and extraction with phosphate buffer.

  • The activity of spermatozoa of Periplaneta -

    The spermatozoa from the spermathecae were either removed by centrifugation or killed by grinding the suspension in a glass mortar. Five experiments using the spermathecae from mated Triatoma phyllosoma, a large heteropteran with spermatozoa easily distinguishable from those of

  • [32] Sorbitol dehydrogenase from spermatozoa -

    Aluminium oxide powder, 5 g, is added to the sample of spermatozoa derived from about 10 ml of ram semen; 0.035 M-phosphate buffer, pH 7, is then added dropwise in a quantity sufficient to produce, on grinding, a thick, doughy mass.

  • The Antigenic Relationship of some Mammalian

    Spermatozoa which had been fragmented by grinding absorbed homo- and hetero-agglutinins from the homologous antiserum, but only reduced the agglutinin content of heterologous antisera. The results suggested that antigens on the surface of spermatozoa of rodents of one species were more deeply situated in those of other species, and that the ...

  • Chapter 5 Methods for Isolation of Nuclei from

    1978-1-1  II. Spermatozoa of Eutherian Mammals Sperm histones of many, perhaps all, eutherian mammals contain about 50-60 mol % of arginine and 8-16 mol % of cysteine residues (5,8-12). The chromatin of mature bull spermatozoaconsistsprincipally of DNAand sperm histones. Essentially all the cysteine residues are present in disulfide form {13).

  • straws是什么意思_straws怎么读_straws翻译_用法_发音 ...

    Grinding performance and physical properties of wheat and barley straws, corn stover and switchgrass. In vitro fertilizing capacity of deep frozen boar semen packaged in 0.5 and 5 ml straws. Effect of freezing and thawing rates on the post-thaw viability of boar spermatozoa frozen in FlatPacks and Maxi-straws

  • Observations and Experiments upon Spermatozoa of

    OBSERVATIONS AND EXPERIMENTS UPON SPERMATOZOA OF THE GUINEA-PIG BERNARD A. CODY Department of Anatomy, Stanford University Received for publication October 23, 1924 On examining a drop of the sperm-laden fluid from the ductus deferens on a warm slide, no signs of motility were observed. ... This method consisted of grinding broken coverslips to ...

  • Sorbitol Metabolism in Spermatozoa - NASA/ADS

    Sorbitol was identified as a chemical constituent of the seminal plasma in the ram, rabbit, bull, boar, stallion, cock and man. Its concentration was determined by an enzymic-spectrophotometric method based on the use of purified sorbitol dehydrogenase from liver. Ram spermatozoa oxidize sorbitol to fructose, and they are also capable of reducing fructose, and to a smaller extent glucose, to ...

  • Flow-Free Microfluidic Device for Quantifying

    2020-2-18  Current male fertility diagnosis tests focus on assessing the quality of semen samples by studying the concentration, total volume, and motility of spermatozoa. However, other characteristics such as the chemotactic ability of a spermatozoon might influence the chance of fertilization. Here we describe a simple, easy to fabricate and handle, flow-free microfluidic chip to test the chemotactic ...

  • Flow-Free Microfluidic Device for Quantifying

    2020-2-18  Current male fertility diagnosis tests focus on assessing the quality of semen samples by studying the concentration, total volume, and motility of spermatozoa. However, other characteristics such as the chemotactic ability of a spermatozoon might influence the chance of fertilization. Here we describe a simple, easy to fabricate and handle, flow-free microfluidic chip to test the chemotactic ...

  • (PDF) Segregation of spermatozoa within sperm

    In avian species, spermatozoa reside in the oviduct for prolonged periods in specialized structures known as sperm storage tubules, but little is known about the relative distribution of ...

  • (PDF) Analyses of DNA content of living spermatozoa

    A two-dimensional fluorescence analysis of spermatozoa stained with Hoechst 33342 was carried out using an Epics V flow cytometer. This analysis involved the measurement of fluorescence both in ...

  • The Antigenic Relationship of some Mammalian

    Spermatozoa which had been fragmented by grinding absorbed homo- and hetero-agglutinins from the homologous antiserum, but only reduced the agglutinin content of heterologous antisera. The results suggested that antigens on the surface of spermatozoa of rodents of one species were more deeply situated in those of other species, and that the ...

  • Detrimental effects of excessive fatty acid secretion on ...

    2020-4-2  Female sperm storage (FSS), the maintenance of sperm inside the female reproductive tract for an extended period of time, is pervasive among organisms with internal fertilization. Because FSS enables asynchronous mating and fertilization, it could be extremely important to reproduction. However, the physiological mechanisms underlying prolonged preservation and maintenance are poorly

  • Sorbitol Metabolism in Spermatozoa - NASA/ADS

    Sorbitol was identified as a chemical constituent of the seminal plasma in the ram, rabbit, bull, boar, stallion, cock and man. Its concentration was determined by an enzymic-spectrophotometric method based on the use of purified sorbitol dehydrogenase from liver. Ram spermatozoa oxidize sorbitol to fructose, and they are also capable of reducing fructose, and to a smaller extent glucose, to ...

  • In Vitro fertilization failure of normozoospermic men ...

    Frozen pellets of spermatozoa were thawed, resuspended in cold PBS and centrifuged twice (5 min, 12000 rpm). The supernatant was removed and spermatozoa were extracted by mixing the last pellet with 500 μl RIPA1X buffer and grinding them. After a last centrifugation, the

  • usefulness of a piezo-micromanipulator in

    Grinding and spiking of the tip of the needle are not necessary in piezo-ICSI, which is considered an advantage because it reduces the amount of preparation required by researchers. In conventional ICSI, immobilization of motile spermatozoa to be injected is conducted by abrasion of sperm tails or pipetting, while in piezo-ICSI it can be ...

  • May–Grünwald–Giemsa stain for detection of

    Introduction. It is well established that mature testicular spermatozoa may be found in cases of non-obstructive azoospermia (NOA) (Tournaye et al., 1996).Thus, testicular sperm extraction (TESE) combined with intracytoplasmic sperm injection (ICSI) offers azoospermic patients the possibility of fathering their own genetic children, even in the absence of normal spermatogenesis (Devroey et al ...

  • Biological pH buffers in IVF: help or hindrance to success

    位置: 8600 Rockville Pike, Bethesda, MD
  • In Vitro fertilization failure of normozoospermic men ...

    Frozen pellets of spermatozoa were thawed, resuspended in cold PBS and centrifuged twice (5 min, 12000 rpm). The supernatant was removed and spermatozoa were extracted by mixing the last pellet with 500 μl RIPA1X buffer and grinding them. After a last centrifugation, the

  • Detrimental effects of excessive fatty acid secretion on ...

    2020-4-2  Female sperm storage (FSS), the maintenance of sperm inside the female reproductive tract for an extended period of time, is pervasive among organisms with internal fertilization. Because FSS enables asynchronous mating and fertilization, it could be extremely important to reproduction. However, the physiological mechanisms underlying prolonged preservation and maintenance are poorly

  • usefulness of a piezo-micromanipulator in

    Grinding and spiking of the tip of the needle are not necessary in piezo-ICSI, which is considered an advantage because it reduces the amount of preparation required by researchers. In conventional ICSI, immobilization of motile spermatozoa to be injected is conducted by abrasion of sperm tails or pipetting, while in piezo-ICSI it can be ...

  • Green Coffea arabica Extract Ameliorates Testicular

    Diabetes mellitus (DM) is a chronic endocrine disease characterized by persistent hyperglycemia. Oxidative damage, inflammatory cytokines, and apoptotic cell death play a major role in the induction and progression of male testicular damage. Plant-derived phytochemicals such as green coffee ( Coffea arabica ) can possess antidiabetic effects with little toxicity.

  • Effects of garlic fractions consumption on male ...

    In this study, the effect of chronic consumption of two garlic fractions was tested: one soluble in water (aqueous solution obtained by grinding and centrifugation) and the other one precipitated by ethanol (alcoholic precipitate obtained by precipitation of the aqueous solution), on different variables of male rats' reproductive functions.

  • Biological pH buffers in IVF: help or hindrance to success

    位置: 8600 Rockville Pike, Bethesda, MD
  • May–Grünwald–Giemsa stain for detection of

    Introduction. It is well established that mature testicular spermatozoa may be found in cases of non-obstructive azoospermia (NOA) (Tournaye et al., 1996).Thus, testicular sperm extraction (TESE) combined with intracytoplasmic sperm injection (ICSI) offers azoospermic patients the possibility of fathering their own genetic children, even in the absence of normal spermatogenesis (Devroey et al ...

  • Genital Definition of Genital at Dictionary

    Genital definition, of, relating to, or noting reproduction. See more.

  • Textbook of MEDICAL PARASITOLOGY

    2017-11-14  to his hobby of grinding fine lenses through which he looked at various objects and brought forth the wonder world of small things that none had seen before. He kept clear descriptions and accurate drawings of what he saw and communicated them to the Royal Society in London. A strict check convinced the Society of their authenticity.

  • Can You Get Pregnant from Pre-Cum? During

    You’re right: Pre-cum doesn’t actually contain any sperm. But it’s possible for sperm to leak into pre-cum. Pre-cum is a lubricant produced by a gland in the penis.

  • Green Coffea arabica Extract Ameliorates Testicular

    Diabetes mellitus (DM) is a chronic endocrine disease characterized by persistent hyperglycemia. Oxidative damage, inflammatory cytokines, and apoptotic cell death play a major role in the induction and progression of male testicular damage. Plant-derived phytochemicals such as green coffee ( Coffea arabica ) can possess antidiabetic effects with little toxicity.

  • Effects of garlic fractions consumption on male ...

    In this study, the effect of chronic consumption of two garlic fractions was tested: one soluble in water (aqueous solution obtained by grinding and centrifugation) and the other one precipitated by ethanol (alcoholic precipitate obtained by precipitation of the aqueous solution), on different variables of male rats' reproductive functions.

  • Cirripede crustacean Britannica

    Cirripede, any of the marine crustaceans of the infraclass Cirripedia (subphylum Crustacea). The best known are the barnacles. Adult cirripedes other than barnacles are internal parasites of marine invertebrates such as crabs, jellyfish, and starfish, and have no common name. Nearly 1,000 cirripede

  • Behavioral aspects of sperm competition in cuttlefish ...

    Sexual selection studies in cephalopods indicate that sperm competition is a central feature of their mating systems, yet this has not been studied experimentally in any detail. In 1998 we staged 20 matings of the cuttlefish, Sepia officinalis L., in the laboratory. Males rapidly initiated mating in the “head-to-head” position, with no apparent courtship. Mating lasted an average of 10 min ...

  • BIOCELL-Vol. 44, No. 2, 2020

    Fifteen SD rats were randomly divided into three groups, with five SD rats in each group. Then, neuron cells were isolated from the adult rat cerebral cortex by the grinding method, the trypsin method, and the collagenase II method, respectively. The expression of anti-NeuN in the neurons of each group was analyzed by flow cytometry.

  • bathtub什么意思啊 - CSDN

    2018-6-27  csdn已为您找到关于bathtub什么意思啊相关内容,包含bathtub什么意思啊相关文档代码介绍、相关教程视频课程,以及相关bathtub什么意思啊问答内容。为您解决当下相关问题,如果想了解更详细bathtub什么意思啊内容,请点击详情链接进行了解 ...

  • Can You Get Pregnant from Pre-Cum? During

    2019-11-12  You’re right: Pre-cum doesn’t actually contain any sperm. But it’s possible for sperm to leak into pre-cum. Pre-cum is a lubricant produced by a gland in the penis.

  • Discovery Of Bacteria - by Antony van Leeuwenhoek

    Antony Leeuwenhoek had naturally gifted eyesight which appropriately accommodated his skills and passion for lens grinding. With his superior light adjusting techniques, he was able to make microscopes which could magnify over 200 times and to some he even had microscopes magnifying up to 500 times. Acknowledgement By the Royal Society of London

  • Genital Definition of Genital at Dictionary

    Genital definition, of, relating to, or noting reproduction. See more.

  • Textbook of MEDICAL PARASITOLOGY

    2017-11-14  to his hobby of grinding fine lenses through which he looked at various objects and brought forth the wonder world of small things that none had seen before. He kept clear descriptions and accurate drawings of what he saw and communicated them to the Royal Society in London. A strict check convinced the Society of their authenticity.