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  • 1
    Electronic Resource
    Electronic Resource
    Migration, Growth Centers, and the Ozarks (1975)
    Oxford, UK : Blackwell Publishing Ltd
    Growth and change 6 (1975), S. 0 
    Details
    ISSN: 1468-2257
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geography , Economics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1468-2257.1975.tb00791.x
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  • 2
    Electronic Resource
    Electronic Resource
    A T-CELL-PRODUCED MEDIATOR SUBSTANCE ACTIVE IN THE HUMORAL IMMUNE RESPONSE (1975)
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 249 (1975), S. 0 
    Details
    ISSN: 1749-6632
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1749-6632.1975.tb29073.x
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  • 3
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    Competition May Control Telephone Costs (1975)
    Saranac Lake, N.Y., etc. : Periodicals Archive Online (PAO)
    Management Review. 64:9 (1975:Sept.) 19 
    Details
    ISSN: 0025-1895
    Topics: Economics
    Notes: FEATURES
    URL: http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&res_dat=xri:pao:&rft_dat=xri:pao:article:7504-1975-064-09-000003
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  • 4
    Electronic Resource
    Electronic Resource
    Differentialgleichungen in Jordantripelsystemen (1975)
    Springer
    Manuscripta mathematica 17 (1975), S. 363-381 
    Details
    ISSN: 1432-1785
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Notes: Abstract In the first section we summarize some properties of Jordan triples. Then we state some rules about differential calculus of rational functions. In the second section we generalize results about norms and traces of Jordan algebras. In the next section we define a group of birational functions belonging to a Jordan triple and characterize this group by differential equations. A special form of these differential equations was given by M. Koecher (see [3], page 44, Theorem 2.1.). In the last section we give some examples. In particular one obtains the exceptional group E6 as a homomorphic image of a transformation group.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01170732
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  • 5
    Electronic Resource
    Electronic Resource
    Information contained in the amino acid sequence of theα1(I)-chain of collagen and its consequences upon the formation of the triple helix, of fibrils and crosslinks (1975)
    Springer
    Molecular and cellular biochemistry 8 (1975), S. 141-157 
    Details
    ISSN: 1573-4919
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Medicine
    Notes: Summary The molecule of type I collagen from skin consists of twoα1(I)-chains and oneα2-chain. The sequence of the entireα1-chain comprising 1052 residues is summarily presented and discussed. Apart from the 279 residues ofα1(I)-CB8 whose sequence has been established for rat skin collagen, all sequences have been determined for calf skin collagen. In order to facilitate sequence analysis, theα1-chain was cleaved into defined fragments by cyanogen bromide or hydroxylamine or limited collagenase digestion. Most of the sequence was established by automated stepwise Edman degradation. Theα1-chain contains two basically different types of sequences: the triple helical region of 1011 amino acid residues in which every third position is occupied by glycine and the N- and C-terminal regions not displaying this type of regularity. Both of these non-triple helical regions carry oxidizable lysine or hydroxylysine residues as functional sites for the intermolecular crosslink formation. Implications of the amino acid sequence for the stability of the triple helix and the fibril as well as for formation of cross-links are discussed. Evaluation of the sequence in connection with electron microscopical investigations yielded the parameters of the axial arrangement of the molecules within the fibrils. Axial stagger of the molecules by a distance D = 670 Å = 233 amino acid residues results in maximal interaction of polar sequence regions of adjacent molecules and similarly of regions of hydrophobic residues. Ordered aggregation of molecules into fibrils is, therefore, regulated by electrostatic and electrophobic forces. Possible loci of intermolecular crosslinks between theα1-chains of adjacent molecules may be deduced from the dimensions of the axial aggregation of molecules.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01792765
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  • 6
    Electronic Resource
    Electronic Resource
    The glomeruli of the human and the rat kidney studied by freeze-fracturing (1975)
    Springer
    Cell & tissue research 160 (1975), S. 177-191 
    Details
    ISSN: 1432-0878
    Keywords: Glomerulus ; Human and rat kidney ; Cell junctions ; Filtration barrier ; Electron microscopy ; Freeze-fracturing
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Glomeruli isolated from rat and human kidneys were studied using the freeze fracture technique. Discontinuous zonulae occludentes and gap junctions were found in the replicas of the split plasma membrane of the endothelial cells. A diaphragm across the endothelial pores was not demonstrated. The central layer of the basement membrane, corresponding to the lamina densa described in thin sections, revealed a coarse substructure. A slit membrane between the pedicles of the podocytes was not detectable; however, its position was indicated by the different texture of the replica, which abruptly changed at the transition of the basement membrane to the primary urinary space. Furthermore, at the level of the slit membrane arrays of particles were present within the cleaved membrane of the pedicles, probably representing the attachment points of the slit membrane. Isolated strands of a zonula occludens as well as gap junctions were seen on the split plasma membrane of the podocytes. The mesangial cells could be identified by their contiguity to the endothelial cells and by their numerous gap junctions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00220576
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  • 7
    Electronic Resource
    Electronic Resource
    The fine structure of the kidney of the hagfish (Myxine glutinosa L.) (1975)
    Springer
    Cell & tissue research 164 (1975), S. 201-213 
    Details
    ISSN: 1432-0878
    Keywords: Kidney ; Myxine glutinosa ; Cell junctions ; Electron microscopy ; Freeze-fracturing
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The fine structure of the kidney (glomerulus and archinephric duct) of the hagfish, Myxine glutinosa (L.) was studied in thin sections and by freeze-fracture technique. The glomerular filtration barrier is similar to that of mammalian kidneys. However, endothelial fenestrations are relatively scanty and the basement membranes of endothelial cells and podocytes always appear separated by a layer of collagen fibrils and microfibrils often surrounding numerous and extended mesangial cells. Between podocytes and their processes maculae occludentes and peculiar junctions of another type occur. The zonulae occludentes between epithelial cells of the archinephric duct are composed of five or more strands, occasionally of only one or two. Supported in part by Deutsche Forschungsgemeinschaft (SFB 146, STO B4) and NIH (ISOI-RR 05764).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00218974
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  • 8
    Electronic Resource
    Electronic Resource
    Junctional complexes of the tubular cells in the human kidney as revealed with freeze-fracture (1975)
    Springer
    Cell & tissue research 160 (1975), S. 193-205 
    Details
    ISSN: 1432-0878
    Keywords: Kidney tubules ; Zonulae occludentes ; Gap junctions ; Freeze-fracture ; Electron microscopy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Intercellular junctions between human kidney tubular cells were studied by the freeze-fracture technique. The number of strands of the zonulae occludentes increased gradually from the proximal segment to the collecting tubule. Only one strand was visible in the proximal segment (in contrast to 2–4 strands of the neighbouring Bowman's capsule). In the thin segment 2–4 strands were revealed. In the distal segment 1–5 strands were present in the pars recta, 4–6 in the pars convoluta. The most extensive and complex zonulae occludentes were found in the collecting tubule. Gap junctions were seen only between proximal tubular cells. The extent of the zonulae occludentes along the tubules in human kidney is very similar to that observed in the kidney tubules of other mammals. The findings accord well with electrophysiological measurements and with the results of tracer studies on experimental animals.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00220577
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  • 9
    Electronic Resource
    Electronic Resource
    Der Beitrag der dimensionsstabilen Anoden (DSA) zur Chlor-TechnologieZusammenfassung der Vorträge von de Nora und Kühn-von Burgsdorff auf der Tagung der GDCh-Fachgruppe “Angewandte Elektrochemie”, 10./11. Oktober 1974 in Leverkusen. (1975)
    Weinheim : Wiley-Blackwell
    Chemie Ingenieur Technik - CIT 47 (1975), S. 125-128 
    Details
    ISSN: 0009-286X
    Keywords: Chemistry ; Industrial Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Die Anwendung der mit Edelmetall-Mischoxiden aktivierten dimensionsstabilen Titan-Anoden (DSA) hat stark zugenommen, seit Titan zu einem wirtschaftlich vertretbaren Preis hergestellt wird. Nach einem einleitenden Kapitel über den Aufbau und die Wirkungsweise der DSA werden ihre technischen und wirtschaftlichen Vorteile im Detail erläutert. Dabei handelt es sich vor allem um den geringeren Energiebedarf pro t Chlor, die Möglichkeit der Kapazitätenerhöhung der Anlagen durch Lasterhöhung und die Vereinfachung der Solereinigung durch Wegfall der Barium-sulfat-Fällung sowie den geringeren Schlammanfall in den Zellen und damit geringere Quecksilber-Verluste, verbunden mit einem geringeren Wartungsbedarf. In der BRD ist der Anteil der Chloralkali-Zellen mit DSA bisher wesentlich geringer als z. B. in den USA, er hat jedoch eine zunehmende Tendenz, da auch ältere Anlagen mit Graphit-Anoden z. T. auf DSA umgerüstet werden.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cite.330470403
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  • 10
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    Information contained in the amino acid sequence of theα1(I)-chain of collagen and its consequences upon the formation of the triple helix, of fibrils and crosslinks (1975)
    Springer
    Details
    Publication Date: 1975-09-01
    Print ISSN: 0300-8177
    Electronic ISSN: 1573-4919
    Topics: Biology , Chemistry and Pharmacology , Medicine
    Published by Springer
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