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  • 1
    Electronic Resource
    Electronic Resource
    Measurements using tangentially viewing bolometers on TFTR (1988)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 59 (1988), S. 1869-1871 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: Co- and counter-viewing bolometers aimed along a common tangency chord are being used to study power losses due to charge exchange (CX) of fast ions in neutral beam injection (NBI) heated TFTR plasmas. For unidirectional injection, tangential bolometers oriented to view CX loss of circulating fast ions detect losses from the thermal target plasma (impurity radiation and CX) plus power due to the fast ion CX loss, whereas bolometers oppositely directed measure only the target plasma contribution. The difference between the two signals is a measure of the fast ion CX loss. Additional information is obtained by comparing the tangential bolometer signals with those of perpendicularly viewing bolometer monitors and arrays. The measurements are compared to results of the TRANSP code analysis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1140091
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  • 2
    Electronic Resource
    Electronic Resource
    Ultrastructure of Trypanosoma lewisi: Flagellum, Microtubules, and the Kinetoplast (1965)
    Oxford, UK : Blackwell Publishing Ltd
    The @journal of eukaryotic microbiology 12 (1965), S. 0 
    Details
    ISSN: 1550-7408
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: SYNOPSIS. With the technique of preselecting pure suspensions of trypanosomes for subsequent electron microscopy and with epoxy resin embedding after glutaraldehyde fixation, we have re-examined the ultrastructure of Trypanosoma lewisi with particular reference to the flagellum and pellicle. The peripheral flagellar tubules exhibit clockwise asymmetry; however, sub-tubule B of the peripheral tubules is divided into a doublet by a diagonally running anti-clockwise arm that originates from the median diaphragm. Projections which seem to be continuous with the counter-clockwise arms extend into a “basket shaped” intra-flagellar structure. This structure, originating distal to the flagellar pocket and running anteriorly within the flagellar membrane, may play a role in maintaining the rigidity of the flagellum.The central flagellar tubules have a double helical substructure and dense cross-striae (diameter 50 Å), and are regularly arranged at distances of approximately 250 Å. The central tubules arise from separate kinetosomal plates that lie at two different elevations. One central flagellar tubule originates from a flattened kinetosomal plate which makes contact with the peripheral tubules. The other central tubule passes through the flattened plate to fuse with an underlying “disc-like” plate.The primary kinetosome exhibits the uniform triplet pattern of tubules at its most proximal region. A pair of tubules closely associated with one of the triplets represents two of the four subpellicular tubules which penetrate the cytoplasm in the region of the flagellar pocket. Sub-pellicular tubules of dimensions similar to the flagellar tubules form a uniform cytoskeleton in all regions of the cell except in the area of the flagellar pocket.A desmosome-like structure maintains continual cell membrane contact with the flagellum and the pellicle. This structure is designated the attachment zone. The fine structure of the kinetoplast is demonstrated. The dense intra-mitochondrial elements (presumably containing DNA) are actually tubules, embedded in a moderately dense matrix. Morphological observations indicate that this organelle is probably primarily concerned with the ontogenesis of mitochondria, and several mitochondria extend from it into the cytoplasm of the cell.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1550-7408.1965.tb03247.x
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  • 3
    Electronic Resource
    Electronic Resource
    Experimental investigation of magnetic compression of a spheromak plasma (1990)
    New York, NY : American Institute of Physics (AIP)
    Physics of Fluids 2 (1990), S. 3074-3080 
    Details
    ISSN: 1089-7666
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Magnetic compression of S-1 spheromak plasmas [Nucl. Fusion 22, 1407 (1982)] was performed to extend the investigation of confinement properties of the spheromak to plasmas with larger current density and higher plasma pressure than obtained before. Evolution of the magnetic configuration was mapped using internal-probe-based flux plots, and it was found that the plasma compression was approximately self-similar. The Taylor equilibrium state was maintained without flux conversion or relaxation phenomena. With a compression factor of up to 1.6, a significant increase of plasma pressure was observed. The peak electron temperature rose from approximately 40 eV before compression to about 100 eV, and the peak density increased somewhat less than the adiabaticity based scaling, which suggests the presence of an enhanced particle loss mechanism. In general, the electron's beta value was approximately constant during the compression; that is, ne0Te0∝B20. This result is consistent with the S-1 scaling obtained earlier without compression. The ion temperature measured by Doppler broadening of low Z impurity line radiation was observed to rise as high as 0.5 keV.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.859218
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  • 4
    Electronic Resource
    Electronic Resource
    Electron dense inclusions in the nucleoli of the myxomycetePhysarum polycephalum (1962)
    Springer
    Cellular and molecular life sciences 18 (1962), S. 255-255 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02148216
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  • 5
    Electronic Resource
    Electronic Resource
    Intranuclear crystalline inclusions in spermatozoa ofLumbricus terrestris (1968)
    Springer
    Protoplasma 66 (1968), S. 21-26 
    Details
    ISSN: 1615-6102
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary In the nuclei of atypical spermatids ofLumbricus terrestris granular or filamentous inclusions are surrounded by dense chromatin. Aggregation and condensation of chromatin in nuclei during spermatid differentiation coincide with increase in density, granularity, and the subsequent crystallization of the intranuclear inclusion. In mature spermatozoa, the crystalline inclusion displaying an irregular shape is composed of parallel repeating units measuring 50–80 Å. The subunits sometimes possess a clear central cavity. Atypical spermatozoa, possessing inclusions that distort their normally cylindrical shape, possess typical acrosomes, middle pieces, and flagella. Spermatozoa bearing intranuclear crystals are rarely observed in the seminal receptacles ofLumbricus. These intranuclear inclusions probably represent proteinaceous material that is not eliminated during nuclear differentiation. Their sole existence in the nuclei of spermatozoa, their transformation into crystalline structures during spermiogenesis, and their similarity to crystals in virus infected plant and animal cells suggest a viral origin.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01252521
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    Paper (German National Licenses)
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