异细胞的

The response to isoproterenol and electrical stimulation of myocytes both in the coronary sinus and outside the ostium were studied through standard glass microelectrode technology to investigate the mechanism of ectopia arrhythmia nearby coronary sinus musculature.

第三部分以标准玻璃微电极技术记录并分析犬冠状窦肌肉结构及冠状窦口外右房组织的心肌细胞动作电位特点，并研究各自对异丙肾上腺素和电刺激的反应，以探讨冠状窦附近起源的异位心律失常的发生机制。

Mdr-l gene and its D-gp expression might be in association wi th the MDR of glioma cells.Verapamil, erythromycin and dihydropyridine could rev erse MDR of glioma cells.

mdrl基因及其P-gp蛋白的表达与胶质瘤细胞产生的MDR有关；异搏定、红霉素和潘生丁对胶质瘤细胞MDR有逆转作用。

The changes included that the protrusions on the cell surface diminished, myofilaments and pinosomes in the myoepithelial cells of grade Ⅱ,Ⅲ atypical hyperplasia decreased, and the irregularity of the nuclear morphosis and the increase of nuclear heterochromosome were found.

乳腺不典型增生时肌上皮细胞数目增多，排列紊乱，电镜下可见：①细胞表面的棒状突起消失；②Ⅱ、Ⅲ级不典型增生时胞浆内的肌微丝和吞饮小泡减少；③细胞核增大，不规则，异染色质增多。

In iron-deficient cells, photosynthetic pigments content decreased, efficiency of photosynthesis was low, With the increase of the concentration of the iron-chelator 2, 2'-Dipyridyl in media, Fv/Fm decreased, indicating photoinhibition increased, the results were consistent with previous research; Heterocyst induction had one delayed time dependent on the status of iron-deficiency, More severe of the iron-deficiency condition, more late of the heterocyst induction, It is possible that certain iron-related genes may directly regulate heterocyst development; under different iron limitation conditions, Protein pattern were different, more serious of the iron-deficiency conditions, less bands of the protein pattern, We could not find the iron-deficiency induced protein; In general the toxic effects of ROS were potentiated by excess iron, But our results revealed that even under iron-deficiency conditions, Oxidative damage existed.

铁限制的细胞光合色素含量下降，光合作用能力下降，随着铁螯合剂2，2'-dipyridyl浓度的增加，叶绿素荧光F〓／F〓逐渐降低，显示光抑制变强。与前人的研究结果相似；依赖铁缺失状态，异形胞诱导有一段推迟的时间，铁缺失越严重，诱导越迟，推断某些铁相关的基因会直接调节异形胞发育；在不同铁营养条件下，蛋白质图谱的变化趋势很明显，缺铁越严重，则蛋白质谱带数愈少，但本文未能找到特异诱导蛋白；一般认为铁过量情况下ROS产生加强，本文结果显示即便在铁缺失条件下，也有氧化胁迫伤害，而且缺铁越严重，活性氧伤害越大。

The spiny eel , belonging to Perciformes, Osteichthyes, is a kind of little freshwater fish distributed in Southern China. In 1998, Our lab detected XX/XY differentiated sex chromosomes in this specie with karyotypic analysis, and then with chromosomal binding and SC observation, we identified that its two largest metacentric chromosomes were X, Y sex chromosomes in 1999. X, Y chromosomes differ each other not only in the distribution of heterochromatin but also in their shapes, which make them could be recognized directly under the light-microscope without any banding treatment.

刺鳅，属鲈形目、刺鳅科(Perciformes，Mastacembelidae)，是广泛分布于中国南方的小型淡水鱼类。1998年，我室通过核型分析，首次发现该物种具有明显分化的异形性染色体，其性别决定类型为XX／XY型。1999年，本室通过染色体显带、精母细胞联会复合体观察，再次确认刺鳅染色体组中最大的一对中部着丝粒染色体为X、Y性染色体，两者不仅已经出现结构异染色质分布上的不同，同时在外部形态上也存在明显差异，识别特征鲜明，在光镜观察下无需显带即能清晰辨认性染色体。

Angiectasis, permeability were increased , inflammatory cell were transuded; The cardiac muscle injury conditions after hypoxia 4 h were similar with hypoxia 2h group, appeared lipid droplet, implied the oxidative metabolism of lipid got obstacle started from then; The cardiac muscle injuried conditions were got little improvement in hypoxia 6 and 8 hours team, mitochondria were increased and aggregatived, normal cell junction, sarcomere contract weaked; in hypoxia 10h group , mitochondria were increased and aggregatived obviously, a few glycogenosome were assembled, transverse tubule were expanded, all the changes may be the adaption of Gansu zokors in the hypoxia tolerance process to 4% hypoxia extent gradually.

在4%严重低氧耐受过程中，甘肃鼢鼠心肌超微结构在2h组出现血管扩张，通透性增加，有炎细胞渗出，异染色质边集；4h组心肌损伤状况与2h组接近，出现脂滴，提示脂类的氧化代谢在此时开始发生障碍，6和8h组心肌损伤状况逐渐好转，线粒体聚集增多，细胞连接正常，肌小节收缩较前有所减弱；10组线粒体增多聚集，线粒体脊增粗更为明显，少量糖原颗粒聚集，脂滴较前有所减少，横小管扩张增大变粗，出现了与能量代谢有关的结构适应性变化。

"The increased levels of apoptosis in the midbrain and pronephric kidney we observe suggest that atrazine may cause tissue malformation by inducing ectopic programmed cell death, either directly or indirectly through a mechanism that has not been identified," wrote the researchers.

&提高水平的细胞凋亡的脑和肾pronephric我们观察表明，莠去津可能会导致畸形组织异位诱导细胞程序化死亡，直接或间接地通过一种机制，还没有确定，&研究人员写道。

More materil as took from resected specimen is helpful for finding more small cell carcinoma,there is poor prognosis in small cell carcinoma concomitant with squamous cell carcinoma compared with squamous cell carcinoma alone,it is suggested that primary small cell carcinoma of esophagus might be derived from a totipotentiality primitive cell in the basal region of the squamous mucosa of the esophagus.

对手术切除标本足够取材有利于发现肿瘤的异源性成分；小细胞癌合并鳞癌者，预后较单纯鳞癌者差；本文结果支持食管小细胞癌起源于原始多潜能干细胞的观点。

Following host injury, the balance between the epimers and isomers is a determining factor in the overall regulation of hematopoiesis, TH/TH(2) balance, and host resistance to infections and tumor growth.

在宿主损伤以后，雄甾烯的异构体和同分异构体之间的平衡是全部生血作用的控制、平衡细胞/体液免疫、宿主抗感染和抗肿瘤增殖的决定因素。

X+_ Following host injury, the balance between the epimers and isomers is a determining factor in the overall regulation of hematopoiesis, TH/TH(2) balance, and host resistance to infections and tumor growth.

在宿主损伤以后，雄甾烯的异构体和同分异构体之间的平衡是全部生血作用的控制、平衡细胞/体液免疫、宿主抗感染和抗肿瘤增殖的决定因素。8p*f：kz\-JT6Z，l

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。