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1.
Summary Normal human spermatozoa were demonstrated by dot immunoblot analysis and immunohistochemistry to possess transglutaminase (TGase). The immunological identification of spermatozoal TGase is consistent with reports by others of its biochemical identification and suggested role in sperm motility,and provides, in view of the immunoregulatory properties of seminal plasma TGase, presumptive identification of a means whereby spermatozoa, under normal physiological conditions, may possibly be protected from immunological attack within the female reproductive tract. 相似文献
2.
The cyclicity and intensity of gastric motlity were examined following glucose injection into the portal vein with an intragastric balloon in anesthetized rats. Enhanced gastric motility caused by insulin administration was influenced by 4 mM glucose (25 l) injected into the portal vein; glucose provoked a shift in the cyclicity power spectrum without any change in intensity. The peak power spectrum shifted from 4.0–5.0 cpm to 2.0–3.0 cpm. Hepatic branch vagotomy abolished the response.The results suggest that glucose signals in the hepatic vagal branch modulate the cyclicity of gastric motiligy. 相似文献
3.
瓦氏黄颡鱼精巢发育及精子生物学研究 总被引:1,自引:0,他引:1
杨家云 《西南师范大学学报(自然科学版)》2005,30(4):719-724
瓦氏黄颡鱼精巢呈栉状分支,每一分支内部结构为叶型,精巢小叶由许多壶腹状的精小囊组成,精巢发育分为精原细胞增殖期、精母细胞生长期、精母细胞成熟期、精子细胞变态期、精子成熟期和精子退化吸收期,精子的发生和形成经历了精原细胞、精母细胞、精子细胞到成熟精子的一系列过程,精巢后1/3的精巢尾区由上皮细胞构成,既无生精功能也无贮精作用,成熟精子在0.45%~0.55%盐溶液和pH7.5的弱碱性的自然河水环境中保持的活性最好,并具有相当长的寿命。 相似文献
4.
Localization of a Robotic Capsule for GI Motility Inspection with a Portable Ultrasonic System 总被引:5,自引:0,他引:5
IntroductionResearchesonmicromedicaldeviceandmicromedicalrobot,especiallytheinvivoinspectionsystemworkinginalimentarycanalorinbloodvesselwithlittledamageornondamagetohumanbodyhavebeenundertakenandreportedbyexpertsinmanycountries.Thesesystemsusuallyownmanyadvantagessuchas:smallvolume,lowpowerconsumption,littleinterferencetoworkingsurroundings,socangreatlyenlargethescopesofmedicalexaminationandrelievethepatientsofdiscomfortcausedbynormalprocedures.Thecapsuleendoscope“NORIKAsystem”developedby… 相似文献
5.
LIU Jianzhong~ ZHANG Yiling~ . College of Chemical Engineering Technology Wuhan University of Science Technology Wuhan Hubei China . College of Animal Science Technology Northwestern University of Science Technology in Agriculture Forest Yangling Shannxi China 《武汉大学学报:自然科学英文版》2006,11(2):447-450
0Introduction Afterthecarryingoutofopen doorpolicies,espe ciallyinthelatesttenyears,livestockandpoul try’sraisingbusinessdevelopedveryfastinChina,whichhelpeduscompletelyshrugofftheembarrassed situationofsevereshortagesofanimalproteininthepastlongperiodandgreatlyexcitedandencouraged us.Meanwhilewemustclearlyrealizethepotentialdangersbehindthepresentprosperities.Ourbreeds arebecominglessandless,manynativebreedswithlowperformancedisappearedcompletely,thetendency oftheirextinctionisincreasinginth… 相似文献
6.
To study the relations between male infertility and centrosome protein (centrin) and the functions of centrin in spermatogenesis,
the matured spermatozoa of 10 normal male people and 18 male infertility patients were stained by immunofluorescence labeling
antibody against centrin. The results showed that two fluorescence signal dots appeared in the normal male spermatozoa and
were located at the base of flagellum. They are proximal centriole and distal centriole. However, in some spermatozoa of the
male infertility, centrin protein was located abnormally at the base of flagellum and its staining signals were spread, the
normal proximal and distal centrioles were confused and could not be recognized separately. These results suggest that abnormality
of centrosome protein may be related to male infertility. This discovery may be used as a marker of abnormal sperm and male
infertility. 相似文献
7.
高云芳 《陕西师范大学学报(自然科学版)》1998,(3)
咖啡和茶是人类饮用最广泛的两大饮料.近年来,关于各种茶的抗癌研究非常活跃[1,2].本实验以小肠电和环肌张力、纵肌张力为指标,用同步记录的方法观察了咖啡因、茶碱和亚硒酸钠对豚鼠离体小肠电活动和小肠张力的影响,旨在从消化生理角度分析咖啡、茶和富硒茶对人... 相似文献
8.
以荧光探针Hoechst33342(Ho33342)特异性标记大白鼠精子和肝细胞DNA,用科学冷却型CCD显微荧光图像系统获取单个细胞的荧光图像,再以图像处理软件“Image-Pro PLus”,分析测量各细胞的DNA相对含量和细胞核的相对面积。实验数据表明:鼠肝细胞的DNA相对含量分别为精子的DNA相对含量的2,4,8倍,符合生物学的规律,说明这套系统的定量结果是可靠的。 相似文献
9.
10.
M. Murakami T. Nishida S. Iwanaga M. Shiromoto 《Cellular and molecular life sciences : CMLS》1984,40(9):958-960
Summary Scanning and transmission electron microscopic observations have been made in the terminal region of the vas deferens of the cat, with emphasis on the occurrence of spermiophagy. The present study has revealed that epithelial cells as well as luminal macrophages are extensively and actively involved in phagocytosis of spermatozoa. The mechanism of the spermiophagy is discussed, in relation to a possible role of the epithelial cells, as one function of the vas deferens. 相似文献