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1.
应用光镜观察了中华稻蝗受精囊及受精囊管的结构。结果表明,中华蝗受精囊由内向外依次为内膜层、上皮层、底膜、结缔组织、肌肉层和围脏膜,可见许多的排出小管穿过内膜层,开口于囊腔,肌肉层中纵肌环肌交杂排列,并讨论了其结构与功能间的联系。  相似文献   

2.
应用光镜对直翅目剑角蝗科中华蚱蜢的受精囊及受精囊管的结构进行了观察,发现受精囊由内向外依次分为内膜层、上皮层、基膜、肌肉层、结缔组织和围脏膜,其中上皮层和内膜层比较发达.  相似文献   

3.
蟋蟀受精囊超微结构的研究   总被引:2,自引:2,他引:0  
黄脸油葫芦雌体受精囊主要由腺细胞和肌肉构成,在透射电镜下观察后发现,受精囊由内向外依次分为内膜,腺细胞层,基膜和肌肉层四层结构,其中,腺细胞层比较发达,主要是由细胞体和毛细分泌管组成;而肌肉层则由纵、环肌两层结构组成,纵肌位于内侧,而环肌位于外侧,纵环肌皆为横纹肌。  相似文献   

4.
通过腺体标本制作技术、石蜡切片技术和光镜观察,研究了中华稻蝗成虫的雄性附腺和储精囊的结构和功能.结果表明,由中胚层发育而来的附腺由15对(8对乳白管,7对透明管)一端开口于射精管,另一端封闭的腺管组成其组织由里到外为上皮层、底膜、肌肉层和结缔组织膜,并按上皮细胞,分泌物将乳白腺管分为酸性腺管和颗粒腺管,透明腺管分为碱性腺管、粘液性腺管和混合性腺管.这些腺管于成虫前后期在大小、上皮细胞、分泌物发生一些变化.精子在储精囊中成团分布,储精囊具柱状上皮细胞和分泌细胞,底膜和肌肉层较发达,围脏膜中有气管,其盲端和中后段组织结构有差异.  相似文献   

5.
为探讨新的体外分离培养新生小鼠子宫内膜上皮细胞的方法,尝试先体外分离新生小鼠子宫内膜上皮层,再从分离后的上皮层分离培养上皮细胞的技术路线,取新生3-4日龄的小白鼠子宫角,4℃下置于1%胰蛋白酶/0.02%EDTA消化液中温和消化90 min,将巴斯德吸管的管径拉成等于或略小于子宫角直径大小,采用吹打的方法机械分离小鼠子宫内膜上皮层与基质层.结果表明:采用胰蛋白酶温和消化子宫角结合机械分离法可成功体外分离新生小鼠子宫角的子宫内膜上皮层,使先体外分离新生小鼠子宫内膜上皮层,再从分离后的上皮层分离培养上皮细胞的技术路线成为可能.  相似文献   

6.
文章选取新疆巴里坤草原西伯利亚蝗和奇台地区意大利蝗的肠道,运用石蜡切片和显微成像技术对两种蝗虫的前、中、后肠进行观察和比较。结果表明,西伯利亚蝗的前、中、后肠较意大利蝗的均表现出进化性,前者消化道的肌肉层相对于后者较厚。在消化道结构上,西伯利亚蝗也显示出了其较强的消化功能和水分的吸收功能,因此西伯利亚蝗具有更强的适应性,其种群从低海拔到高海拔,从荒漠、山地荒漠草原到山地草原均有分布。  相似文献   

7.
南方鲇消化道组织形态学的研究   总被引:6,自引:0,他引:6  
应用组织学技术,对鲇形目南方鲇的消化道组织结构进行了系统的研究。结果表明,食道、胃和肠壁内突形成明显的粘膜皱褶。食道壁肌肉层极厚,并为横纹肌;胃、肠壁的肌肉层为平滑肌,胃盲囊部、幽门部的肌肉层明显比贲门部厚,肠前段的环肌层较中段厚,后段的环肌层最厚。胃腺发达,贲门部的胃腺较厚,从盲囊部下段至幽门部,胃腺逐渐减少至消失。食道近胃贲门处,贲门部和胃幽门部的粘膜下层有丰富的致密结缔组织,且有众多分支伸入肌肉层,逐渐分支变细直达肌肉细胞之间,彼此联结成网状,该结构在鱼类消化道中尚未见报道。  相似文献   

8.
利用显微观察并描述了直翅目网翅蝗科雏蝗属青藏雏蝗Chorthippus qingzangensis、小翅雏蝗C.fallax、东方雏蝗C.intermedius、红胫雏蝗C.rufitibis、白纹雏蝗C.albonemus共五种雏蝗雄性外生殖器的形态特征。结果表明:五种雏蝗雄性外生殖器发生变化最为明显的部位是冠突、前突、侧板、桥和色带连片及阳茎基瓣,在种间存在明显差异。通过对雄性外生殖器的形态结构比较,在探讨蝗总科分类和系统发育上均具有重要意义,并为雏蝗属种类鉴定提供了新的分类依据。  相似文献   

9.
我们用组织化学的方法,对猪巨吻棘头虫的DNA、RNA、α—氨基酸、糖元和磷酸酶进行研究。结果在虫体体壁的下皮层,有丰富的糖元分布,α—氨基酸在此部位的含量也较多。在其生殖器官和巨核内有明显的DNA。下皮层、肌肉层、吻腺中含有RNA。体壁下皮层、肌肉层、生殖器官显示酸性磷酸酶。角质层、下皮层、卵膜上显示碱性磷酸酶。  相似文献   

10.
小熊猫咽和食管的组织学研究   总被引:1,自引:0,他引:1  
对小熊猫的咽和食管的组织结构进行了研究。结果表明:小熊猫的咽壁由粘膜(包括上皮和固有膜)、粘膜下层内除咽肌所组成,粘膜下层内除分布有混合腺外,还有大量的骨骼肌纤维束,小熊猫的食管壁由粘膜(包括上皮、固有膜和粘膜肌、粘膜下层、肌肉层和纤维膜所组成,食管壁的厚度,食管腔的大小及食管皱壁的有无等方面存在较大个体差异,固有膜有乳突插入复层扁平上皮内,粘膜下层内有大量的食管腺分布,肌肉层从食管的前段到后段全是骨骼肌,分内、外两层,并不呈典型的内环行、外纵行排列,而呈现多样性,并与大熊猫食管壁组织结构作了比较研究。  相似文献   

11.
Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.  相似文献   

12.
何延凌 《科技信息》2008,(4):258-258
Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women's language from these perspectives: pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women's language, more attention should be paid to language use in social context. What's more, the linguistic phenomena in a speaking community can be understood more thoroughly.  相似文献   

13.
王慧 《科技信息》2008,(10):240-240
Wuthering Heights, Emily Bronte's only novel, was published in December of 1847 under the pseudonym Ellis Bell. The book did not gain immediate success, but it is now thought one of the finest novels in the English language. Catherine is the key character of this masterpiece, because everybody and everything center on her though she had a short life. We can understand this masterpiece better if we know Catherine well.  相似文献   

14.
The Williston Basin is a significant petroleum province, containing oil production zones that include the Middle Cambrian to Lower Ordovician, Upper Ordovician, Middle Devonian, Upper Devonian and Mississippian and within the Jurassic and Cretaceous. The oils of the Williston Basin exhibit a wide range of geochemical characteristics defined as "oil families", although the geochemical signature of the Cambrian Deadwood Formation and Lower Ordovician Winnipeg reservoired oils does not match any "oil family". Despite their close stratigraphic proximity, it is evident that the oils of the Lower Palaeozoic within the Williston Basin are distinct. This suggests the presence of a new "oil family" within the Williston Basin. Diagnostic geochemical signatures occur in the gasoline range chromatograms, within saturate fraction gas chromatograms and biomarker fingerprints. However, some of the established criteria and cross-plots that are currently used to segregate oils into distinct genetic families within the basin do not always meet with success, particularly when applied to the Lower Palaeozoic oils of the Deadwood and Winnipeg Formation.  相似文献   

15.
理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。  相似文献   

16.
As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.  相似文献   

17.
Location based services is promising due to its novel working style and contents.A software platform is proposed to provide application programs of typical location based services and support new applications developing efficiently. The analysis shows that this scheme is easy implemented, low cost and adapt to all kinds of mobile nework system.  相似文献   

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