摘要:

SYNOPSISNeurones from the thoracic and abdominal ganglia of the prawn,Leander serratus, were studied by optical and electron microscopy. The following cytoplasmic inclusions have been studied:1. The endoplasmic reticulum, which is more or less uniformly distributed throughout the cytoplasm in a vesicular form. Parallel lamellæ associated with granules have rarely been encountered. Sufficiently large aggregates of organized endoplasmic reticulum, corresponding to the Nissl bodies of vertebrates, have not been seen.2. The “dictyosomes”, which are composed of stacks of paired non‐granular membranes. The stacks are generally seen as rods, crescents, and horse‐shoes in electron micrographs, and resemble the complex known generally as the “Golgi apparatus”. The evidence indicates that these lamellar structures correspond to the spherical or nearly spherical bodies that are seen in living cells and colour with neutral red.3. The “trophospongium”, which is shown to consist of branching invaginations of the cell membrane, containing processes from the glial cells. It ramifies in the form of long, thin, branching filaments throughout the cytoplasm. Some workers with the light microscope have mistaken these branching invaginations for mitochondria.4. The mitochondria, which are mostly short. Long, filamentous mitochondria which might be expected to give the appearance of the “trophospongium” have

ISSN:0368-3974    

DOI:10.1111/j.1365-2818.1961.tb00461.x

出版商:Blackwell Publishing Ltd    

年代:1961

数据来源: WILEY

摘要:

SYNOPSISThe cytology of the various cells of the male genitalia ofOniscus asellusare described. The spermatogenesis is of normal flagellate type. The sperms are non‐motilein vitroand are glued together. Cyto‐chemical investigations of the supporting cells of the testicular follicles and the large cells of the vasa deferentia are also repor

ISSN:0368-3974    

DOI:10.1111/j.1365-2818.1961.tb00462.x

出版商:Blackwell Publishing Ltd    

年代:1961

数据来源: WILEY

摘要:

SYNOPSISContinuous ultraviolet irradiation of the amœgba,Chaos chaos, was accomplished by ultraviolet flying‐spot television microscopy, and the results were recorded by time‐lapse motion‐picture photography.A study of such motion‐picture films reveals thatChaos chaosprogressively reacts to ultraviolet irradiation administered in this way by:(a) increased serration of the plasmalemma(b)increased gelation of the cytoplasm(c) decreased and spasmodic motion of the entire amœba(d)formation of plasmalemma blebs(e) portions of plasmalemma and endoplasm being pinched off into the surrounding medium, (f) sudden spasmodic contractile dissolution of the amœba into the medium.Electron micrographs of intact irradiated amœba show the major change to be one of increased accumulation of water in the cytoplasm, without apparent alteration of plasmalemma, mitochondria, or nucle

ISSN:0368-3974    

DOI:10.1111/j.1365-2818.1961.tb00463.x

出版商:Blackwell Publishing Ltd    

年代:1961

数据来源: WILEY

摘要:

SYNOPSISThe histology is described, for the first time, of the liver, kidney, and heart muscle of the rare and primitive cetaceanCaperea (Neobalœna) marginataGray, 1844. Observations are also submitted on the hepatic histology ofPhyseter catodon, Megaptera novœangliœandLagenorhynchus cruciger, and a tentative hypothesis is advanced concerning the mode of venous drainage of the cetacean liver lobule. Attention is drawn to a hitherto undescribed histological feature of the kidney ofCaperea, Physeter, PhocœnaandLagenorhynchus, and its interpretation is attempted in terms of renal structure and funct

ISSN:0368-3974    

DOI:10.1111/j.1365-2818.1961.tb00464.x

出版商:Blackwell Publishing Ltd    

年代:1961

数据来源: WILEY

ISSN:0368-3974    

DOI:10.1111/j.1365-2818.1961.tb00465.x

出版商:Blackwell Publishing Ltd    

年代:1961

数据来源: WILEY

摘要:

SYNOPSISA new technique has been developed for the measurement of the electrical mobility of suspended tissue cells. It is shown that the mobility is characteristic for a given type of tissue. Various types of ascites tumours show characteristic mean values and distributions of mobility, which remain stable over long periods of time. Normal cells and homologous tumour cells which were examined showed differences between their mobilities, the negative surface charge on the tumour cell being almost double that of the corresponding normal tissue.

ISSN:0368-3974    

DOI:10.1111/j.1365-2818.1961.tb00466.x

出版商:Blackwell Publishing Ltd    

年代:1961

数据来源: WILEY

ISSN:0368-3974    

DOI:10.1111/j.1365-2818.1961.tb00467.x

出版商:Blackwell Publishing Ltd    

年代:1961

数据来源: WILEY

ISSN:0368-3974    

DOI:10.1111/j.1365-2818.1961.tb00468.x

出版商:Blackwell Publishing Ltd    

年代:1961

数据来源: WILEY

ISSN:0368-3974    

DOI:10.1111/j.1365-2818.1961.tb00469.x

出版商:Blackwell Publishing Ltd    

年代:1961

数据来源: WILEY

摘要:

SYNOPSISThe construction of a self‐contained, transportable cinemicroscope based on an inverted microscope stand is described.The apparatus provides for accurate control of the temperature of the specimen and for a wide range of photographic procedures. It is suitable for use for a variety of biological problems.In the course of experiments on the behaviour of cells in controlled environments, it became apparent that there was a lack of suitable commercial cinephotomicrographic apparatus at a modest price, and that this was deterring a number of workers from employing cinephoto‐micrography as a technique in their investigations. Since we required apparatus additional to the simple cinemicroscope we have already described (Trevan&Roberts, 1960; Pybus, 1960) we determined as a research project to develop a cinemicroscope with the following considerations in mind:1. It should be suitable for use for a wide variety of biological problems, including those requiring time‐lapse photography.2. It should be self‐contained and transportable.3. It should be simple to construct, to operate, and to maintain.4. It should be constructed as far as possible from standard, commercially available parts.5. The cost should

ISSN:0368-3974    

DOI:10.1111/j.1365-2818.1961.tb00470.x

出版商:Blackwell Publishing Ltd    

年代:1961

数据来源: WILEY