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人类精子的
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  human sperm
     Calcium ionophore A 23187 has been used to induce acrosome reaction of human sperm and to investigate the relationship between some ions and acrosome reaction by removing Na~+ from the medium; by adding antagonist of K~+, TEA chloride; or antagonist of Ca~(++), Verapamil;
     本文用离子载体A23187诱导人类精子的顶体反应,并通过去除介质中Na~+,或在介质中加入K~+阻滞剂,或Ca~(2+)阻滞剂,或Na~+-K~+-ATP酶阻滞剂的方式来研究人类精了顶体反应与几种离子及Na~+泵的关系。
短句来源
     Conclusions Toxoplasma tachyzoites inhibit human sperm motility and decrease sperm viability in vitro. Its mechanism may be the tachyzoite adhesion to human spermatozoa.
     结论弓形虫速殖子体外可显著降低精子存活率和抑制精子运动功能,其机制可能与弓形虫速殖子对人类精子的黏附作用和虫体侵入精子形成精子损伤等有关。
短句来源
     Objectives:To investigate effect of calmodulin antagonists on human sperm.
     目的 :探讨钙调素拮抗剂 (CaMA)对人类精子的影响。
短句来源
     The Effect of Calcium Channel Blocker on Human Sperm
     钙通道拮抗剂作用机制及其对人类精子的影响
短句来源
     The histochemical, immunocytochemical and fluorescence staining were adopted for qualitative analysis and localization of some chemical substances in human sperm.
     本文应用组织化学、免疫细胞化学及荧光染色技术,对人类精子的化学物质进行定性定位。
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  “人类精子的”译为未确定词的双语例句
     FINE STRUCTURE OBSERVATIONS OF HUMAN SPERMATOZOA BY MEANS OF FREEZE--ETCH REPLICA TECHNIQUES
     人类精子的超微结构——冷冻复型法电子显微镜观察
短句来源
     CYTOCHEMICAL LOCALIZATION OF CHEMICAL SUBSTANCES IN HUMAN SPERM
     人类精子的化学物质定位
短句来源
     Sperm Chemotaxis in Humans:Pre contact Sperm Egg Communication
     人类精子的趋化性:接触前的精-卵通讯
短句来源
     All in all, in the past 50 years, the sperm count decreased about half.
     总之,纵观过去50年,人类精子的数量下降了约50%。
短句来源
     Ultrastructural observations on human spermatozoa preserved by 3% glutaraldehyde and prepared by freeze-etch replica techniques were carried out.
     应用冷冻复型电子显微镜技术,研究了正常人类精子的超微结构,通过观察分析,作者发现如下现象并提出了相应的推论。
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  相似匹配句对
     CYTOCHEMICAL LOCALIZATION OF CHEMICAL SUBSTANCES IN HUMAN SPERM
     人类精子的化学物质定位
短句来源
     Acrosomal proteinase activity of human testicular sperm and epididymal sperm
     人类睾丸精子和附睾精子的顶体蛋白酶活性
短句来源
     Human Sperm Bank, MSB
     人类精子库
     Human Sperm Bank,HSB
     人类精子库
     SHAPE OF THE SPERM OF ALLIGATOR SINENSIS
     扬子鳄精子的形态
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  human sperm
The 431/432 base pair S1 was homologous to human sperm zona pellucida binding protein, while the other two ESTs, S3 and S4, were new gene segments, which were registered to GenBank with the number of AF 117656 and AF 126507 respectively.
      
Studies on the relationship between urokinase plasminogen activator (uPA) and human sperm motility
      
The types of the voltage-dependent calcium channels (VDCCs) in human ejaculatory sperm and the effects of calcium channel blocker (CCB) on human sperm motility parameters in vitro were investigated.
      
The human sperm motility parameters in vitro in response to the pharmacological agents nifedipine (NIF, inhibitor of L-type VDCC) and θ-contoxin (GVIA, inhibitor of N-type VDCC) were compared and analyzed statistically.
      
The results showed that NIF (1, 5, 10 μmol/L) could not only significantly affect human sperm's shape but also spermatozoa motility after incubated at least 10 min in vitro (P>amp;lt;0.001).
      
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Ultrastructural observations on human spermatozoa preserved by 3% glutaraldehyde and prepared by freeze-etch replica techniques were carried out.The results were as follows: 1.According to the structural features,the head of human sperm may be divided into three distinct different regions,namely,fore-head,mid-head and hind-head.This regional distinction may represent the functional differences. 2.Regional difference of the intramembranous particles of the inner-and outer- leaflets of the plasma membrane was...

Ultrastructural observations on human spermatozoa preserved by 3% glutaraldehyde and prepared by freeze-etch replica techniques were carried out.The results were as follows: 1.According to the structural features,the head of human sperm may be divided into three distinct different regions,namely,fore-head,mid-head and hind-head.This regional distinction may represent the functional differences. 2.Regional difference of the intramembranous particles of the inner-and outer- leaflets of the plasma membrane was also revealed.The intramembranous particle is very rich in the fore-head region of inner-leaflet.However,the mid-bead region is very smooth and there are only a few particles attached on its fractured face,but groups of extrinsic membrane particles can be seen on its inner plasma-face.As for the hind-head region the inner-and outer-leaflets of the unit membrane contact closely with each other and attach tightly to the nuclear membrane.It is suggested that this structure is prerequisite for attaching the tail to the head firmly.The PF-face of sperm tail pla- sma membrane is rich in particles but without special pattern in arrangement. 3.The acrosome is extremely large,almost 8/10~9/10 of the nuclear surface is covered by it,its posterior margin sometimes is described as “posterior ring”.Two distinc- tive parts may be seen on the acrosome:The fore-acrosome,which corresponds to the fore-head region,is rich in membrane particles.It looks plump in appearance and is filled up with content.There is also pore-like structure at the internal membrane of the acrosomal cap.The hind-acrosome part,corresponds to the mid-head region.There are less particles than the fore-acrosome part.Its external and internal membranes contact with each other and it looks lean in features. 4.The polarity of the nucleus is very obvious.On the anterior part of the nucleus the nuclear pores are distributed irreglarly,and in the middle part there is no pore, but in the posterior part the nuclear pores are large and arranged closely as regular hexagonal arrays.A hypothesis is proposed that the anterior part of the nucleus may regulate the activity of acrosomal hydrolase by chemical message which is presumably produced by the chromosome and transfered from the nuclear pore through the pore of the acrosomal membrane into the cavity of the acrosome.The posterior part of the nucleus is thought to be the place where the chemical message,which may be the pro- duct of a particular gene,is transfered through the nuclear pores to the tail,and it can adiust the absolutely synchronous movement of the axial microfilarnents and modulate the oxidation phosphorylation and energy-release of the mitochondria.

应用冷冻复型电子显微镜技术,研究了正常人类精子的超微结构,通过观察分析,作者发现如下现象并提出了相应的推论。一、按照结构特点,精子头可分为前、中、后三头区,形态结构的这种区域性,反映了生理功能的区域性。二、质膜内外片的膜内颗粒,具有不同的区域性;在前头区内片膜内颗粒丰富;中头区内片从断裂面看膜面平滑、颗粒少,从胞质面看有成群散在的表在性膜蛋白粒;后头区质膜内外片贴附紧密,并与核膜相贴,结构坚韧,可提供精子尾保持牢固附着的部位;精子尾质膜 PF 面颗粒丰富,但未见任何特异的排列方式。三、顶体极大,分前后两部,遮盖核表面十分之八九;前顶体位于前头区范围,膜内颗粒丰富,外形肥厚,充满内容物,内膜层有孔状结构;后顶体则位于中头区范围,膜内颗粒少,内外膜相贴,外形干瘪。四、细胞核极性明显,在前头区核孔无规律,中头区核孔不明显,后头区核孔大而密,排列成规律的六角式;作者推论:核的前头区可能发出控制顶体囊蛋白水解酶活性及细胞识别的化学信息,经核孔传出,后头区大概也发出化学信息,经核孔输向尾侧,以协调统筹轴丝微丝运动的绝对同步及线粒体的能量释放。

In order to elucidate the ultrastructural changes of human spermatozoa afteradministration of gossypol acetate 40 mg/day for 50 days,freeze-replica techniqueswere employed.In addition to the ordinary changes of spermatozoa,such as swelling,wasting,atrophy,tortuosity,nodulation in the head and/or tail region and fracture betweenhead and tail,the internal structure,biomembrane and intramembranous particles ofsperm also showed relatively more sensitive changes.The changes of biomembranerevealed certain shift in...

In order to elucidate the ultrastructural changes of human spermatozoa afteradministration of gossypol acetate 40 mg/day for 50 days,freeze-replica techniqueswere employed.In addition to the ordinary changes of spermatozoa,such as swelling,wasting,atrophy,tortuosity,nodulation in the head and/or tail region and fracture betweenhead and tail,the internal structure,biomembrane and intramembranous particles ofsperm also showed relatively more sensitive changes.The changes of biomembranerevealed certain shift in regard to the firmness of reciprocating attachment of inner-and outer-leaflets of the unit membrane.On the other hand,the changes of intra-membranous particles revealed a specialized arrangement,this is,on the plasmamembrane of head and tail they were concentrated into lattice work,whereas,in thehind-head region they accumulated as clusters.In the hind-acrosomal membranetwo types of particles,large and small,may be distinguished,the smaller ones werearranged orderly in lines of all directions.As for the nuclear pores,no changewas found in this study.It is considered that the influences of gossypol upon human spermatozoa,firstof all,were shown in the biomembrane and intramembranous particles,and theordinary changes in appearance were the secondary result.In the discussion,it'ssuggested that a special agent,gossypol receptor,responsible for the gossypol effectsto the sperm,may be present in the plasma membrane of the spermatozoa.

应用冷冻复型透射电镜研究法,观察了连续口服醋酸棉酚50天后,人类精子超微结构的变化。发现除精子头尾的肥大、瘦小、萎缩、扭曲、断尾和结节隆起等一般改变外,精子内部、生物膜及膜内微粒皆有相应更敏感的变化。生物膜的变化系单位膜两叶片的相互贴附性有某些改变;膜内微粒的变化系表现特殊集结,即在头尾的质膜集结为窗格状,在后头区可集结为粒团;在后顶体膜则出现两类颗粒,其中小的一种表现为各向成行的阵列。核孔未发现变化。作者认为棉酚对精子的影响作用首先表现在生物膜及膜内微粒,而一般外形改变则是继发结果。文内还推论棉酚对精子影响的靶性关系,可能与精子质膜存在棉酚受体有关。

The ultrastructure of primary sperm and frozen sperm in four adultSaanen goats were observed by the freezing etching electron microscopy.Results from our obseryation showed that the frozen wound, first of all,began at plasmalemma, and continued to traumatize the acrosome andmitochondrion. The wound patterns were mainly shown in the changes ofdistribution, arrangement and morphology of minute protein granulesinterdigitated in unit membrans and joined among the minute granules. Andin the second place, they appeared...

The ultrastructure of primary sperm and frozen sperm in four adultSaanen goats were observed by the freezing etching electron microscopy.Results from our obseryation showed that the frozen wound, first of all,began at plasmalemma, and continued to traumatize the acrosome andmitochondrion. The wound patterns were mainly shown in the changes ofdistribution, arrangement and morphology of minute protein granulesinterdigitated in unit membrans and joined among the minute granules. Andin the second place, they appeared in the local mechanical wound. Accord-igly, there exist three typical regions in the spermatozoon in goats, thesame as those in human beings. This paper described the characteristicsof each region. In addition, the defence ability of the sodium-defattedmilk-glyceral extender of spermatozoa being superior to that of the tris-glucose-glycerol extender was observed in the freezing process.

用冰冻蚀刻电子显微镜法对4头萨能成年山羊的原精和冻精超微结构进行了初步观察。结果表明:冻伤首先从质膜开始,继而损伤顶体和线粒体。损伤方式主要表现为镶嵌在单位膜内的蛋白质微粒的分布、排列和形态的改变,以及微粒之间联结的变化。其次表现为局部的机械性损伤。山羊精子也和人类精子一样,头部表面存在三个典型的区域。本文对各区特征作了描述。此外观察到柠檬酸钠——脱脂乳——甘油比Tris——葡萄糖——甘油稀释液对精子的保护性能为优。

 
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