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精子超微结构
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  sperm ultrastructure
     The electron microscope observation showed that sperm ultrastructure of 0.183 mg/kg group was not seen abnormal plasma membrane and mitochondrion and for 0.915 mg/kg group there was a bit more distant from plasma mem- brane to cytoplasm with some big vacuolisations in enlarged mitochondrial intracristal space, but there was no significant differences compared with control group (P>0.05).
     透射电镜观察显示,0.183mg/kg组精子超微结构无显著性变化,0.915mg/kg组精子头部两侧膜与头部胞质间隙轻微扩大,线粒体嵴间腔扩大且轻度空泡化,但与对照组相比无统计学意义(P>0.05)。
短句来源
     Investigation of Sperm Ultrastructure after Vasovasostomy
     输精管吻合术后精子超微结构观察
短句来源
     Recent progresses of study on sperm ultrastructure of Bivalve, Gasteropod and Cephalopoda were introduced.
     介绍了国内外双壳类、腹足类和头足类软体动物精子超微结构的研究概况 .
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     An investigation of sperm ultrastructure changes from epididymis after vasectomy to semen after vasectomy reversal.
     输精管结扎术后附睾精子及其吻合术后再现精子超微结构的观察
短句来源
     Objective To investigate the epididymal sperm ultrastructure after vasectomy.
     目的分析输精管结扎术后附睾精子超微结构的变化。
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  spermatozoa ultrastructure
     Study on Morphological Character of Human Spermatozoa Ultrastructure
     人类精子超微结构形态特征研究
短句来源
     Study on Spermatozoa Ultrastructure in Tettigonioidea
     螽斯总科Tettigonioidea精子超微结构的研究
短句来源
     The thesis represents the study on the spermatozoa ultrastructure of 20 species in Tettigonioidea, Orthoptera. Out of them, 10 species belong to Conocephalidae, 5 to Phaneropteridae, 2 to Tettigoniidae, 1 to Mecopodidae, 1 to Pseudophyllidae and 1 to Meconematidae.
     应用常规超薄切片技术研究了螽斯总科草螽科(10种)、露螽科(5种)、螽斯科(2种)、纺织娘科(1种)、拟叶螽科(1种)、蛩螽科(1种)20个种精子的超微结构,比较了科间、属间以及种间精子超微结构的异同。
短句来源
     1. The spermatozoa ultrastructure in ConocephalidaeThere is not distinct difference in spermatozoa ultrastructure between species in the genus Conocephalus of this family.
     1.草螽科精子超微结构的特点 草螽属种间精子超微结构差异不显著。
短句来源
     WT5”HX]Objectives:[WT5”BZ]To study the spermatozoa ultrastructure of infertile male.
     目的 :研究男性精子超微结构形态特征。
短句来源
  “精子超微结构”译为未确定词的双语例句
     The sperm motility[(40.82±4.73)%]in the radiation at power density of(1 400 μW/cm~2) was significanfly reduced(P<0.05),and the change ultra structure of sperm in the group appeared.
     1 400μW/cm2辐射组的精子活动率[(40.82±4.73)%]明显下降,与对照组比较,差异有显著性(P<0.05),并出现精子超微结构的改变。
短句来源
     Ultrastructural studies on the sperm of Charybdis feriatus
     锈斑虫寻(Charybdis feriatus)精子超微结构的研究
短句来源
     Bcl-2 and Bax Expressions in Spermatogenic Cells and Ultrastructural Changes in Spermatogenic Cells and Sperms of Mice Exposed to Mercury
     汞对小鼠生精细胞Bcl-2、Bax表达和生精细胞、精子超微结构的影响
短句来源
     The activity of LDH-X(338.143±73.348)in the radiation at power density of 1 400 μW·cm -2 was significantly reduced(P<0.05),and changes of the ultrastructure of sperm appeared.
     但 14 0 0 μW·cm-2 辐射组的LDH X活性显著下降 (P <0 .0 5 ) ,并出现精子超微结构的改变。
短句来源
     Ultrastructure of human epididymal spermatozoa after vasectomy
     输精管结扎术后附睾精子超微结构的变化
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  sperm ultrastructure
Sperm Ultrastructure of Two Mollusk Species Geukensia demissa and Modiolus modiolus (Mytilidae, Bivalvia)
      
Sperm ultrastructure was studied in two Atlantic species of bivalve mollusks Geukensia demissa and Modiolus modiolus (Mytilidae).
      
Spermiogenesis and sperm ultrastructure of Carmyerius endopapillatus (Digenea, Gastrothylacidae), a parasite of Bos taurus in Se
      
Sperm ultrastructure supports monophyly of the Paguroidea, while distinguishing coenobitids from pagurids within this superfamily.
      
Sperm ultrastructure of the giant clam Tridacna maxima (Tridacnidae: Bivalvia: Mollusca) from the Great Barrier Reef
      
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  spermatozoa ultrastructure
In the present study spermiogenesis was investigated in Cetopsis coecutiens (Cetopsidae), and Bunocephalus amazonicus (Aspredinidae), while spermatozoa ultrastructure was investigated in C.
      


In the present article, an electron microscopic examination of ultrastructure of ram sperm was carried out by the use of negative staining technigue. Particular attention has been given to the change of morphology of acrosome. According to the structures observed,the acrosomal morphology may be classified into 6 categories; namely, intact, loose, slightly swollen, swollen, partially detached, detached. The first two are regarded as normal acrosome and its percentage has been used as a means of measuring the...

In the present article, an electron microscopic examination of ultrastructure of ram sperm was carried out by the use of negative staining technigue. Particular attention has been given to the change of morphology of acrosome. According to the structures observed,the acrosomal morphology may be classified into 6 categories; namely, intact, loose, slightly swollen, swollen, partially detached, detached. The first two are regarded as normal acrosome and its percentage has been used as a means of measuring the acrosomal integrity. According to the statistical analysis it is evident that there was a significant correlation between percentage of acrosomal integrity and fertility. Therefore such a kind of classification is objective and can be used as a useful parameter to evaluate the quality of ram semen. It may also be used for prediction of fertility.

作者用电子显微镜负染色技术观察绵羊精子的超微结构,重点观察顶体的形态变化,并将顶体形态分为:正常、疏松、微膨、膨胀、半脱、全脱六类。认为前两类同属完整顶体,其所占比例作为顶体完整率。统计结果表明:顶体完整率和各类精液的品质有明显的一致性,并和受胎率有明显的相关。初步认为,这种分类法客观可靠,可以作为评定精液品质的指标之一,并能在一定程度上反应精液的授胎能力。

The ultrastructural changes in spermatozoa of men were studied at various time intervals: following gossypol treatment. Fertile-age male volunteer were given a daily dose of 20 mg of gossypol acetate for 50 days,and followed by a maintenance dose of 40 mg per week. Semen examinations were made on five subjects before treatment as self-control and on the 30th and 50th day respectively after gossypol treatment.Another 7 cases taking maintenance dose were examined on the 84th day after treatment. The precipitates...

The ultrastructural changes in spermatozoa of men were studied at various time intervals: following gossypol treatment. Fertile-age male volunteer were given a daily dose of 20 mg of gossypol acetate for 50 days,and followed by a maintenance dose of 40 mg per week. Semen examinations were made on five subjects before treatment as self-control and on the 30th and 50th day respectively after gossypol treatment.Another 7 cases taking maintenance dose were examined on the 84th day after treatment. The precipitates of semen following centrifugation were fixed in glutaraldehyde- osmic acid.After dehydration with graded acetone,the specimens were embedded in Epon 812 and observed in a JEM electron microscope. It was shown that the spiral sheath of mitochondria and the acrosome head cap systems were the most sensitive organelles responding to gossypol.They were the first to show a detectable damage and suffered the most severe damage.The axial filaments and nuclei also demonstrated different degrees of ultrastructural changes.The severely damaged spermatozoa finally disintegrated.Appearance of cell debris and exfoliated unmatured spermatogenic cell in semens were evident. Based on the above results,the nature and significance of the ultrastractural damages of spermatozoa induced by gossypol were analysed and discussed.

本研究报道育龄男子服醋酸棉酚后不同时期精液中精子超微结构改变的观察结果。育龄男性志愿者每日服药剂量为20毫克,连服50天后,改服每周40毫克的维持量,共观察了服药前5例作为自身对照,他们于服药后30天和50天分别再予检查;另对服维持量第84天的7例进行了观察。精液离心之沉渣用戊二醛-锇酸固定,丙酮脱水,Epon 812包埋,电镜观察。观察结果表明,螺旋鞘膜线粒体和顶体-核帽系统是对棉酚最敏感的细胞器,出现损伤最早、最严重,轴丝体和细胞核亦有不同程度的改变。严重的可见整个精子崩溃解体,精液中出现细胞残体和大量脱落细胞。根据上述结果,对棉酚造成精子损伤的性质及其意义予以分析和讨论。

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。

 
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