弱激光照射周氏新对虾心脏细胞的显微和超微结构观察

采用He-Ne激光照射周氏新对虾的心脏组织.组织学和生物统计学表明:He-Ne激光照射后,心脏组织具有明显异染色质的细胞数量有所增加.在同一照射强度的情况下,照射的时间越长,其心脏组织具有明显异染色质的细胞数量就越多;电镜观察结果表明:经过2 h照射立即取材的心肌细胞,细胞核形态发生变化,异染色质增加,线粒体出现空泡化、嵴断裂、水肿,粗面内质网出现扩张、颗粒脱落.     

感染暴发性流行病病毒的中国对虾形态学研究 3.病虾鳃的显微与超微结构

在光镜和透射电镜下，观察经实验感染暴发性流行病病毒中国对虾的鳃组织，发现鳃丝扁平上皮细胞及少量的网状隔膜细胞被感染而引起血隙狭小，以及巨噬细胞样无颗粒细胞的趋化作用导致鳃丝扁平上细胞增厚而影响其代谢功能，另外，还观察到巨噬细胞样无颗粒细胞有强烈的吞噬作用，小颗粒细胞也具吞噬作用，在染色质凝聚结构等刺激下胞吐小颗粒，大颗粒细胞也具有胞吐大颗粒功能，与上述无颗粒细胞相比，胃结缔组织血窦内的浆细胞样无颗粒细胞其释放与病毒结合参与体液免疫。     

刀额新对虾复眼的外部形态结构及光、暗适应对其超微结构的影响

应用电镜技术观察了刀额新对虾复眼的形态结构以及光、暗适应对其超微结构的影响．结果表明，刀额新对虾复眼外形呈圆球形，约由93116个小眼组成，组成复眼的小眼面均为正方形．每个小眼由折光系统和感光系统组成．光、暗适应时折光系统的结构基本相同，但感光系统之间有较大的差异．暗适应时，组成感杆束的微纤毛排列整齐，膜下储泡囊数量多，体积大，色素颗粒仅分布在细胞体远端；而光适应时，组成感杆束的微纤毛排列凌乱，并有部分溶解，多囊体多，各个层面上有板膜体的出现，色素颗粒分布于整个细胞．     

Observation of fiber ultrastructure of Ligon lintless mutant in upland cotton during fiber elongation

Lintless mutant is a super-short fiber mutanl in upland cotton only 4-8 mm in fiber length and also named Ligon cotton controlled by one dominant gene Li1. Fiber ultrastructure of the mutant (Li1) and its its wild (li1) in siti and in vitro was observed under an electron microscope to understand its cytological characteristics during the fiber cell elongation. The resulls showed that the mutant fiber in situ had thinner cytoplasm, more small vacuoles, less mitochondria, Golgi apparatus and endoplasmic reticula, and there were more starch granules which were free or packed in the amyloplast beside the cell wall than thai of wild type. It was indicated that scarcity of functional organelles and disability of transformation from starch to sugar might be associated with the tact that the mutant fiber cell was aborted too early to elongate into normal length. Mutant ovule in some media containing GA3 could produce a kind of huge callus that grew faster than normal ovules. The callus was covered with many white, loose, and semitransparent fiber-like cells that apt lo get off from ovule. These fiber-like cells were multicellular fibers generated by cell division and had black dots just like pigment glands in the stem and leaf of cotton. There were lots of micro-tubes beside cytoplasm membrane uf the multiecllular fiber, which were thought to be primary preparation for second wall deposition of multicellular fiber. It was indicated that GA3 might induce the expression of gene(s) that kept inactive in the field condition and then stimulate the original fiber cell in vitro to undergo divisionagain.     

红腹锦鸡小脑皮层的显微和亚显微结构观察

为探讨红腹锦鸡小脑皮层形态结构特征,用光镜和透射电镜观察了红腹锦鸡的小脑皮层显微和亚显微结构.结果表明,红腹锦鸡小脑皮层可分分子层、Purkinje细胞层、颗粒层3层.分子层含少量小细胞,细胞大小在4.5～8.3μm;Purkinje细胞层细胞体呈梨状,底宽在17.8～25.6μm之间,高约为18～30μm,细胞中含有丰富的粗面内质网、游离核糖体、线粒体、高尔基体、溶酶体等;颗粒层的颗粒细胞细胞核大,细胞质少.有髓鞘神经纤维中轴突直径多在0.66～1.62μm之间,轴突或树突中含有线粒体等细胞器,也含有丰富的微管,髓鞘厚约为0.13μm.血-脑屏障的内皮细胞的细胞核呈扁平形,细胞质中多含有线粒体和少量吞饮小泡.     

碳纤维用PAN原丝的结构与性能

采用以二甲基亚砜（DMSO）为溶剂的连续溶液聚合和一步湿法纺丝技术，在10t／a中试实验装置上成功地制备了碳纤维用聚丙烯腈（PAN）原丝批量产品。通过不断地优化聚合和纺丝工艺条件，实现了PAN原丝的中试稳定化。实验结果表明，采用连续溶液聚合技术在实现单体高度转化的同时获得了高分子量的PAN共聚物，通过调整凝固成型工艺条件和牵伸配比制备了具有圆形截面且结构致密的高取向度PAN原丝。将批量PAN原丝产品进行预氧化、低温碳化和高温碳化后．获得PAN基碳纤维，其束丝强度、模量和断裂伸长率的平均值分别达到3．74GPa，223GPa和1．7％。     

活性炭纤维纸的制备、结构及性能研究

采用湿法造纸工艺制备活性炭纤维纸(ACFP),探讨了分散剂、活性炭纤维与纸浆纤维配比对活性炭纤维纸的透气度、抗张强度、比表面积和微孔体积的影响。结果表明,分散剂可增加ACFP的抗张强度而对透气度影响较小,随活性炭纤维含量的增加,ACFP的透气度增加而抗张强度下降, ACFP具有与活性炭纤维类似的孔径大小和孔径分布, 二者的氮气吸附等温线均为I型等温线,吸附机理均为微孔填充,ACFP的形态结构为无序随机排列。     

氯化汞对小白鼠卵巢损伤的显微镜及超微结构研究

对氯化汞染毒小白鼠卵巢进行了显微和超微结构研究。结果表明,氯化汞对小白鼠卵巢发育有明显的毒性作用,主要表现出卵巢内发育的卵泡（原始卵泡、生长卵泡、成熟卵泡）数量随剂量的增高依次性减少,而闭锁卵泡的数量则相反,为依次性增高。超微结构显示,从中剂量组开始,卵照相结构表现出病理学变化,主要表现为卵细胞核膜皱缩,染色质凝聚,胞质内线粒体肿胀、变形,外膜和内嵴受损,次级溶酶体及残余小体增多等现象。     

A tentative study on the ultrastructure of the Middle Permian AcritarchMicrhystridium from western Yunnan, China

A preliminary study on the ultrastructure of Middle Permian AcritarchMicrhystridium from western Yunnan has been made using laser scanning confocal microscope (LSCM). Some quite new features about the texture and ultrastructure of this kind of Acritarch has been detected for the first time, which opens up a new application of this advanced technique to microfossil study.     

根尖肉芽肿中免疫细胞超微结构的研究

为了进一步探讨根尖肉芽肿组织中的免疫反应机理 ,提高疗效 .对 35例根尖肉芽肿组织进行组织化学染色光镜及透射电镜下免疫细胞形态学的观察 .根据光镜下细胞成分及电镜下免疫细胞形态超微结构的改变及相互关系 ,提出根尖肉芽肿具有细胞免疫和体液免疫反应参与 .本文有助于阐明免疫反应因素在根尖肉芽肿所起的作用和发病机理 ,提示巨噬细胞、肥大细胞对免疫应答具有启动作用 ,为临床应用抗菌和免疫疗法提供理论依据     

窄线宽光纤激光器温度调谐研究

通过研究热调谐与窄线宽光纤激光器波长的变化关系,实验发现光纤激光器的输出激光波长随温度连续变化,输出功率略有波动,从光谱仪上没有观察到跳模现象。跟踪几个温度点观察测量的自外差谱线,发现谱线的3dB带宽的变化小于1kHz,以光纤光栅标准具为主要选模器件构成的光纤激光器显示出了优良的光谱性能以及波长稳定性。