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  h-band
     Terminals of C-band and H-band in yellow rye chromosomes of octoploid triticale show green bands, this is because of high content of heterochromatin in terminal of rye chromosomes.
     八倍体小黑麦中黄色黑麦染色体显C-带和H-带的末端有绿色的带。 这是由于黑麦染色体末端结构异染色质含量高所致。
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     a. zone, E.
     C,E.
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     Pseudoendothyra ninghuaensis Zone.
     Pseudoendothyraninghuaensis
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     bittteri Zone, N. leveni Zone and N.
     billeri,N.
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     they are the Cyrtograptus murchisoni zone,C.
     lapworthi—C.
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     N-BANDING OF AUTOTETRAPLOID BARLEY CHROMOSOMES
     同源四倍体大麦的N-
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  h-band
H-band polarimetric images and Ks-band images of star formation region L1641S are presented.
      
In red fibers, the H-band region of the sarcoplasmic reticulum consists of an elaborate network of narrow tubules.
      
In the H-band region of the sarcoplasmic reticulum there is a more compact arrangement of broad more or less parallel tubules.
      
Invaginations of the sarcolemma forming transverse tubules have been found at all levels of the sarcomere with the exception of the H-band level.
      
Transverse tubules are found both at the Z-band level (Tz-tubules) and at the H-band level (Th-tubules).
      
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The best preserved portions of the muscle tissues of the wife of Li-tsang, the Marquis of Tai and Chancellor of the Kingdom of Changsha, retained distinct contours and showed characteristic cross-striations. Under the electron microscope, one could see clearly substances of the A band and the Z band, whereas those of the H zone and the I band disappeared almost completely. The muscle fibril assumed the shape of a bamboo shoot, looking as if it were made up of a stack of alternate layers of two "half A disks"...

The best preserved portions of the muscle tissues of the wife of Li-tsang, the Marquis of Tai and Chancellor of the Kingdom of Changsha, retained distinct contours and showed characteristic cross-striations. Under the electron microscope, one could see clearly substances of the A band and the Z band, whereas those of the H zone and the I band disappeared almost completely. The muscle fibril assumed the shape of a bamboo shoot, looking as if it were made up of a stack of alternate layers of two "half A disks" (one wing of the A cylinder minus the H zone) to one Z disk, held together by remnants of the microfilaments and wrapped up in the sarcoplasmic reticulum. Using subtilisin digestion and mechanical disintegration we were able to obtain fragments of the Han cadaver resembling the following constituents of the myofibril: "half A disk" and its fragments, thick and thin filaments with a length equal to the thickness of the "half A disk", and Z disk and its fragments.Taking into consideration the relative emptiness of the I band on both sides of the Z disk as well as of the H zone of the A band, and the relative accessibility of sarcoplasmic enzymes to the I and H bands of human myofibril, we have carried out a model experiment in an attempt to simulate the limited autolysis of the muscle of the Han cadaver. It was found that when fresh human muscle was treated with an excess of a crude preparation of beef spleen cathepsins, one could obtain electron micrographs strikingly similar to those obtained in the case of the Han cadaver. The results throw some light on the possible role played by cathepsins in the limited autolysis of the Han cadaver.Using the sandwich, indirect immunofluorescence technique, with fluorescein isothiocyanate as the label, it was shown that the best preserved portions of the psoas muscle of the Han cadaver retained antigenicity to a certain extent.It was possible to solubilize some proteinous constituents of the muscle with the aid of S. D S., urea, ethanolamine and other solvents.A. considerable proportion of the collagenous constituents of muscle tissues of the Han cadaver was found to be fragmented into 20~40 A miorofilaments in 1.5% S.D. S. solution at pH 7, a phenamenon closely parallel to that shown by fresh human collagen. Clostridium collagenase acted upon the collagenous fibrils and gave rise in succession to loss of contrast, disappearance of cross-striations and fragmentation into microfilaments, in a manner analogous to that exhibited by controls.Detection of cytochrome c in the heart muscle and pancreatic enzymes in the pancreas gave negative results. It was possible, however, to isolate some proteinous fragments from the brain tissue.Aspects of the preservation of the Han cadaver, such as the exogenous and endogenous factors for preservation, in vitro and in vivo stability of the protein molecules concerned, and rapid and long term changes suffered in the course of time, were discussed in the light of experimental findings.

对马王堆一号汉墓软侯妻尸体的肌肉等组织的细微结构进行了一些观察和试验,借以判断此尸体保存的程度和探索其所经历的变化。主要结果如下: 1.用硫酸十二酯钠浸泡或胶原酶水解,可以使汉尸腰大肌的胶原组织解聚松散,暴露出比较干净的肌纤维,横纹结构清晰,肌纤维膜仍存在。2.汉尸腰大肌和膈肌保存得较好的部分,除肌纤维膜外,沿纤维方向基本上已失去连续性,Ⅰ带细丝和H带物质大部分消失,只剩余“半A盘”及Z盘物质和若干残丝。3.利用枯草杆菌酶局部酶解和机械打碎等手段,获得汉尸腰大肌肌原纤维的各种碎片。参考现代尸肌原纤维的各种纤维和盘带组分的形态以及汉尸超薄切片所显示的细微结构,从形态上初步鉴定其为A盘物质(“半A盘”)及其碎片,不完整的粗丝和细丝,Z盘物质及其碎片。4.用组织蛋白酶作用于现代尸横纹肌,可以模拟汉尸腰大肌降解的过程。对肌原纤维的A带和Ⅰ带而言,由于空间阻碍因素,酶容易作用于Ⅰ带的细丝。局部酶解后,肌肉超薄切片的图象与汉尸极为类似。这个结果也提示:组织蛋白酶在汉尸的自溶降解过程中可能起过主要的作用。5.根据免疫萤光标记法的初步观察,汉尸腰大肌保存得较好的部分,肌球蛋白的抗原性尚有部分的保存。6.利用硫酸十二酯钠、脲、...

对马王堆一号汉墓软侯妻尸体的肌肉等组织的细微结构进行了一些观察和试验,借以判断此尸体保存的程度和探索其所经历的变化。主要结果如下: 1.用硫酸十二酯钠浸泡或胶原酶水解,可以使汉尸腰大肌的胶原组织解聚松散,暴露出比较干净的肌纤维,横纹结构清晰,肌纤维膜仍存在。2.汉尸腰大肌和膈肌保存得较好的部分,除肌纤维膜外,沿纤维方向基本上已失去连续性,Ⅰ带细丝和H带物质大部分消失,只剩余“半A盘”及Z盘物质和若干残丝。3.利用枯草杆菌酶局部酶解和机械打碎等手段,获得汉尸腰大肌肌原纤维的各种碎片。参考现代尸肌原纤维的各种纤维和盘带组分的形态以及汉尸超薄切片所显示的细微结构,从形态上初步鉴定其为A盘物质(“半A盘”)及其碎片,不完整的粗丝和细丝,Z盘物质及其碎片。4.用组织蛋白酶作用于现代尸横纹肌,可以模拟汉尸腰大肌降解的过程。对肌原纤维的A带和Ⅰ带而言,由于空间阻碍因素,酶容易作用于Ⅰ带的细丝。局部酶解后,肌肉超薄切片的图象与汉尸极为类似。这个结果也提示:组织蛋白酶在汉尸的自溶降解过程中可能起过主要的作用。5.根据免疫萤光标记法的初步观察,汉尸腰大肌保存得较好的部分,肌球蛋白的抗原性尚有部分的保存。6.利用硫酸十二酯钠、脲、乙醇胺等溶剂,加温、匀浆,可从汉尸腰大肌中抽提出一些蛋白质组分或其局部降解物。7.从汉尸心肌中测不出细胞色素c。8.汉尸胶原纤维在硫酸十二酯钠溶液中解聚,和为胶原酶降解的过程,与现代尸胶原纤维很为类似。9.用乙醇胺溶液可自汉尸大脑顶叶抽提出一些蛋白质组分或其局部降解物。血红素类物质有所保存。10.讨论了汉尸保存程度的一些规律性问题。

The mixed muscles Sartorius,consisting of slow and last fibres,of chick weredenervated and observations on the mean cross-sectional areas of each type ofmuscle fibre were made at 1,4 and 6 months after the section of nerve.Frozen sec-tions with m-ATP-ase staining show striking hypertrophy of the slow fibres,theaverage cross-sectional areas were 286%,315% and 279% after 1,4 and 6 monthsrespectively,while those of the fast fibres reduced to 60%,31% and 37% of the con-trol.Six months after denervation the slow...

The mixed muscles Sartorius,consisting of slow and last fibres,of chick weredenervated and observations on the mean cross-sectional areas of each type ofmuscle fibre were made at 1,4 and 6 months after the section of nerve.Frozen sec-tions with m-ATP-ase staining show striking hypertrophy of the slow fibres,theaverage cross-sectional areas were 286%,315% and 279% after 1,4 and 6 monthsrespectively,while those of the fast fibres reduced to 60%,31% and 37% of the con-trol.Six months after denervation the slow fibres can still be well stained withm-ATP-ase staining,pale after alkalinic and dark-brown throughout the fibreafter acidic pre-incubation.Electronmicroscopic examination on the hypertro-phied slow fibres show normal array of microfilaments,clear A and Ⅰ bands.TheZ-line is as clear as normal except a few short sections blurred or bifurcated.Evi-dent structural destruction,namely,the disintegration ofmicrofilaments,is hardlyseen even 6 months after denervation,indicating a high stability of the struc-ture of the slow fibres in the mixed muscles of chick.The extent of the abovementioned hypertrophy is quite prominent as compared to the load-lifting hyper-trophy(+30%),the“compensatory hypertrophy”(+20-40%)and the“post-denervation hypertrophy”of the hemidiaphragm of rodents(+25-55%).Theslow fibre in the mixed muscle of chick is considered an adequate model for thestudy of denervation hypertrophy.

鸡的缝匠肌是含有Ⅰ型(慢)纤维和Ⅱ型(快)纤维的混合肌,在该肌的神经被切断并阻止其再生后1、4与6个月进行观察。冰冻切片结合肌原纤维三磷酸腺苷酶(m-ATP-ase)的染色法显示慢肌纤维发生成倍的肥大。在去神经6个月后快、慢纤维仍然因酸或碱性预处理而呈现染色的反转。在电镜下观察,去神经后发生肥大的慢纤维仍然呈现微丝的正常排列。清楚的A、Ⅰ带与 H 带。它的 Z 线清楚但在有些纤维中的有些很短的段落变得模糊或分裂,在去神经6个月的肌肉,有些慢纤维仅局部结构模糊但绝大部分地区呈现结构完好,这说明这种鸟类的混合肌的慢纤维在去神经后结构上仍有很大的稳定性。以上观察也说明这种去神经肥大的现象除了在发生原因上值得注意以外,它在肥大的程度与持久性上和其他的实验性肌肉肥大相比也是很显著的。

The Transient photoconductivity of a-Si:H has been studied with the excitation ofdouble frequency YAG laser. It was found that the rise and decay of the photoconductivi-ty could be described by a power exponential function. The time response of rise and de-cay is of the order of microsecond. and decreases with the increase of the excitationintensities.With the point of view of the dispersive transport in amorphous semiconduc-tors, the results have been discussed. We deduced the dispersive parameter a and theband...

The Transient photoconductivity of a-Si:H has been studied with the excitation ofdouble frequency YAG laser. It was found that the rise and decay of the photoconductivi-ty could be described by a power exponential function. The time response of rise and de-cay is of the order of microsecond. and decreases with the increase of the excitationintensities.With the point of view of the dispersive transport in amorphous semiconduc-tors, the results have been discussed. We deduced the dispersive parameter a and theband tail distribution parameter T_0, providing some information about the band taildistribution in amorphous semiconductors.

用YAG电光调Q倍频的脉冲激光作为激光发源研究了a-Si:H的瞬态光电导。实验发现这种材料的瞬态光电导的上升和下降时间可以用时间的幂指数规律来描述,并且随激发脉冲强度的增加而减小。基于非晶半导体中存在弥散输运过程的特征,我们对结果进行了讨论,获得了一系列样品的弥散参数a和特征温度T_0值,从而给出a-Si:H的带尾分布信息。

 
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