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  • 1
    Electronic Resource
    Electronic Resource
    Zur Photolyse des ZinksulfidsProfessor Robert Schwarz zum 60. Geburtstage gewidmet (1947)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 255 (1947), S. 45-64 
    Details
    ISSN: 0372-7874
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Es wird Über Versuche berichtet, die unternommen wurden, die Bedingungen zu studieren, die die Lichtempfindlichkeit des Zinksulfids beeinflussen.Es wird im einzelnen Folgendes festgestellt: 1 Die Belichtungstemperatur besitzt keinen wesentlichen Einfluß auf den Ablauf der Photolysereaktionen.2 Die Kristallstruktur ist entgegen der bisherigen Auffassung ohne wesentliche Bedeutung.3 Lichtempfindlichkeit und Korngrößenverteilung der Präparate gehen parallel, und es lassen sich aus einem Präparat durch Fraktionieren nach der Korngröße verschieden lichtempfindliche Fraktionen gewinnen. Es lassen sich weiterhin durch hydrothermale Synthese aus Zinksulfid reine Blenden herstellen, die dieselbe Lichtempfindlichkeit haben, wie hochgeglühte Präparate mit Wurtzitstruktur.Die Wirkung von Schwermetallzusätzen wird untersucht und auf Grund der von M. BODENSTEIN für die Silberhalogenide entwickelten Anschauungen diskutiert.Abschließend wird Über Versuche berichtet, die den Einfluß der Konzentrationsbedingungen bei der Fällung von reinem ZnS und von Lithopone zum Gegenstand haben.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19472550106
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  • 2
    Electronic Resource
    Electronic Resource
    Ultrastructure of blebbing phenomenon and phagocytosis of blebs in laryngeal carcinoma (1979)
    Springer
    European archives of oto-rhino-laryngology and head & neck 225 (1979), S. 129-140 
    Details
    ISSN: 1434-4726
    Keywords: Zelluläres “Blebbing”-Phänomen ; Phagozytose ; Larynxkarzinom ; Maligne Keratinozyten ; Cellular blebbing ; Phagocytosis ; Laryngeal carcinoma ; Malignant keratinocytes
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary The epithelial-connective tissue junction of invasive squamous cell laryngeal carcinoma was examined electron microscopically. The pleomorphic cytoplasmic protrusions known as blebs were observed on the lateral and basal surfaces of malignant keratinocytes. These blebs were pinched off from the malignant epithelial cells and were then observed in the connective tissue or in the intercellular spaces. After the pinching-off process some blebs were seen to be closely surrounded by pseudopods of phagocytizing histiocytic cells in the lamina propria or by adjacent malignant keratinocytes in the intercellular spaces. Since blebs are believed to be intact parts of viable cells this engulfment can be interpreted as cytophagocytosis. During cytophagocytosis the zeiotic blebs exhibited varying degrees of enzymatic digestion. The process of blebbing was discussed in respect to cellular locomotion of malignant keratinocytes during tumor invasion. This phenomenon seems to occur only in the preliminary stages of malignant tumor growth in the larynx.
    Notes: Zusammenfassung Die Epithel-Bindegewebsgrenze von invasiven Plattenepithelkarzinomen des Kehlkopfes wurde elektronenmikroskopisch untersucht. An den lateralen und basalen Oberflächen der malignen Keratinozyten wurden pleomorphe Zytoplasmaprotrusionen (Blebs) beobachtet. Diese Blebs wurden nach ihrer Abschnürung von den malignen Epithelzellen im Bindegewebsstroma und in den Interzellularräumen vorgefunden. Nach dem Abtrennungsprozeß wurden die Blebs von Pseudopodien phagozytierender Histiozyten der Lamina propria oder benachbarter maligner Keratinozyten in den Interzellularräumen umfaßt. Da die Blebs als intakte Anteile vitaler Zellen aufzufassen sind, kann dieser Prozeß im Sinne einer Zytophagozytose interpretiert werden. Während des Vorganges der Zytophagozytose ließen die zeiotischen Blebs verschiedene Stadien eines enzymalen Abbaues erkennen. Der Blebbing-Vorgang wurde in Hinblick auf die zelluläre Lokomotion der malignen Keratinozyten während der Tumorinvasion erörtert. Dieses Phänomen kommt nur in den Frühstadien des malignen Tumorwachstums des Kehlkopfes zur Beobachtung.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00455213
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  • 3
    Electronic Resource
    Electronic Resource
    Ultrastructural localization of acid phosphatase in human laryngeal carcinoma (1980)
    Springer
    European archives of oto-rhino-laryngology and head & neck 226 (1980), S. 213-218 
    Details
    ISSN: 1434-4726
    Keywords: Larynxkarzinom ; maligne Keratinozyten ; saure Phosphatase ; Lysosomen ; Zytochemie ; Laryngeal carcinoma ; Malignant keratinocytes ; Acid phosphatase ; Lysosomes ; Cytochemistry
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary The subcellular distribution of acid phosphatase in malignant keratinocytes of invasive laryngeal carcinoma was studied by ultrastructural cytochemistry. The reaction product was localized in Golgi, ER, and some cytoplasmic vesicles. Acid phosphatase activity was also observed in lysosomal structures in the cortical cytoplasm of basal carcinoma cells. Extracellular acid phosphatase activity also occurred at the tumor-stroma junction in membrane-bound vesicular structures. The localization of acid phosphatase in this report is discussed in relation to acid phosphatase activity in other tumors. The findings lend further support to the important role of hydrolytic enzyme release in respect to tumor invasion into surrounding tissues.
    Notes: Zusammenfassung Die subzelluläre Verteilung von saurer Phosphatase in malignen Keratinozyten des invasiven Larynxkarzinoms wurde mit Hilfe der ultrastrukturellen Zytochemie untersucht. Das Reaktionsprodukt war im Golgi-Apparat, endoplasmatischen Retikulum und in einigen zytoplasmatischen Vesikeln lokalisiert. Saure Phosphatase-Aktivität wurde auch in lysosomalen Strukturen im kortikalen Zytoplasma der basalen Karzinomzellen beobachtet. Extrazellulär fand sich Phosphatase-Aktivität in membranbegrenzten Strukturen an der Tumor-Stromagrenze. Die Lokalisation der sauren Phosphatase in der vorliegenden Arbeit wird in Hinblick auf saure Phosphatase-Aktivität in anderen Tumoren erörtert. Die Ergebnisse unterstreichen die bedeutende Rolle, welche der Freisetzung von hydrolytischen Enzymen bei der Tumorinvasion in umgebende Gewebe zukommt.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00455582
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  • 4
    Electronic Resource
    Electronic Resource
    Tubuloreticular structures in laryngeal carcinoma (1984)
    Springer
    European archives of oto-rhino-laryngology and head & neck 241 (1984), S. 65-74 
    Details
    ISSN: 1434-4726
    Keywords: Tubuloreticular structures ; Endoplasmic reticulum ; Macrophages ; Laryngeal carcinoma
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Tubuloreticular structures (TRS) were observed electron microscopically in stroma cells of human laryngeal carcinoma. The TRS appeared as networks of membranous tubules 20–30 nm in diameter, which were always situated in dilations of the endoplasmic reticulum (ER). The presence of TRS was observed not only in cells situated in the tumour stroma, but also in some stroma cells which had migrated to the carcinomatous epithelium. However, they were not found in malignant keratinocytes. In some places, incomplete forms of TRS may be observed, which in earlier reports have been referred to as worm-like or comma-shaped bodies. These incomplete forms of TRS, which are clearly shown to arise contiguous to the ER cisternae, may represent different developmental stages of TRS morphogenesis rather than disintegration steps. The observations indicate that the TRS — seen in various disorders such as viral, neoplastic, and auto-immune diseases — may well represent a common reaction pattern of the ER system of the host cell.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00457919
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  • 5
    Electronic Resource
    Electronic Resource
    Intracytoplasmic desmosomes in malignant keratinocytes of laryngeal carcinoma (1980)
    Springer
    European archives of oto-rhino-laryngology and head & neck 226 (1980), S. 219-223 
    Details
    ISSN: 1434-4726
    Keywords: Desmosomen ; Larynxkarzinom ; maligne Keratinozyten ; Desmosomes ; Laryngeal carcinoma ; Malignant keratinocytes
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary In this communication the presence and ultrastructural morphology of intracytoplasmic desmosomes is demonstrated in laryngeal carcinoma. The intracytoplasmic desmosomes observed here closely resemble those found in normal epithelia. The intracellular location of the intracytoplasmic desmosomes was demonstrated by the cytoplasmic continuity around one or both ends of the lateral membranes. The removal of desmosomal structures from the cell surface resulting in the formation of intracytoplasmic desmosomes may further contribute to the loss of intercellular contact in carcinoma cells.
    Notes: Zusammenfassung Es wird über das Vorkommen und die ultrastrukturelle Morphologie von intrazytoplasmatischen Desmosomen in Larynxkarzinomen berichtet. Die beobachteten intrazytoplasmatischen Desmosomen sind den Desmosomen ähnlich, die in normalen Epithelien vorkommen. Die intrazelluläre Lokalisation der intrazytoplasmatischen Desmosomen wird durch die zytoplasmatische Kontinuität, welche eines oder beide Endstücke der lateralen Membranen umgibt, nachgewiesen. Die Beseitigung von desmosomalen Strukturen von der Zelloberfläche führt zur Bildung der intrazytoplasmatischen Desmosomen und leistet somit einen Beitrag zu dem interzellulären Kontaktverlust der Karzinomzellen.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00455583
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  • 6
    Electronic Resource
    Electronic Resource
    Gap junctions in laryngeal carcinoma (1980)
    Springer
    European archives of oto-rhino-laryngology and head & neck 228 (1980), S. 51-56 
    Details
    ISSN: 1434-4726
    Keywords: Gap junctions ; Larynxkarzinom ; maligne Keratinozyten ; Gap junctions ; Laryngeal carcinoma ; Malignant keratinocytes
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary The ultrastructural morphology of gap junctions in malignant keratinocytes of invasive squamous cell carcinoma of the human larynx was studied by electron microscopy. The ultrastructure of gap junctions in the malignant keratinocytes was similar to the typical intercellular gap junctions described in normal tissues. In human laryngeal carcinoma, however, the gap junctions were noticeably reduced in number as compared to normal epithelia. Spherical intracytoplasmic structures limited by gap junctional membranes were also found. These annular gap junctions arise by invagination of the cell surface membrane. The loss of gap junctions in laryngeal carcinoma is probably one of the many prerequisites which facilitate tumor invasion.
    Notes: Zusammenfassung Die ultrastrukturelle Morphologie der Gap junctions in malignen Keratinozyten des invasiven Plattenepithelkarzinoms des Kehlkopfes wurde elektronenmikroskopisch untersucht. Die Ultrastruktur der Gap junctions in den malignen Keratinozyten entsprach derjenigen von typischen interzellulären Gap junctions, wie sie in normalen Geweben beschrieben wurde. Beim Larynxkarzinom war jedoch die Anzahl der Gap junctions im Vergleich zu normalen Epithelien erheblich reduziert. Es wurden auch sphärische intrazytoplasmatische Strukturen beobachtet, die von Gap junctionalen Membranen begrenzt waren. Diese annularen Gap junctions entstehen durch Einstülpungen der Zelloberflächenmembran. Der Verlust der Gap junctions beim Larynxkarzinom dürfte eine der vielen Voraussetzungen sein, welche die Tumorinvasion ermöglichen.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00455894
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  • 7
    Electronic Resource
    Electronic Resource
    The fate of hemidesmosomes in laryngeal carcinoma (1979)
    Springer
    European archives of oto-rhino-laryngology and head & neck 222 (1979), S. 187-198 
    Details
    ISSN: 1434-4726
    Keywords: Larynxkarzinom ; Maligne Keratinozyten ; Halbdesmosomen ; Epithel-Bindegewebsgrenze ; Laryngeal carcinoma ; Malignant keratinocytes ; Hemidesmosomes ; Epithelial-connective tissue junction
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary The ultrastructural morphology of the hemidesmosomes in malignant epithelial cells of invasive squamous cell carcinoma of the human larynx was studied by electron microscopy. In the more advanced carcinomas the hemidesmosomes are reduced in number or absent over extensive areas of the epithelial-stromal junction. In some places the hemidesmosomes are observed to be in the process of being dislodged from their normal sites at the plasma membrane of the basal carcinoma cell. After dislodgement from the basal plasmalemma into the subepithelial connective tissue the hemidesmosomes are seen to round off with the cytoplasmic attachment plaques lying on their inner circumference. A constant feature of the detached hemidesmosomes is the absence of inserting tonofilaments. Frequently, the detached hemidesmosomes are found to be in close association with detached multilayered basement membrane material in the stroma. The detached hemidesmosome-structures appear to migrate down into the deeper layers of the connective tissue space apparently loosing their distinct ultrastructure. These observations indicate that the detachment of hemidesmosomes and their subsequent downward dermal migration may result in a loss of epithelial-stromal adherence in invasive epithelial cancer of the larynx.
    Notes: Zusammenfassung Die ultrastrukturelle Morphologie der Halbdesmosomen in malignen Epithelzellen des invasiven Plattenepithelkarzinoms des menschlichen Kehlkopfes wurde elektronenmikroskopisch untersucht. In Karzinomen mit fortgeschrittener Tumorinvasion sind die Halbdesmosomen über ausgedehnte Abschnitte der Epithel-Stromagrenze reduziert oder nicht mehr vorhanden. An manchen Stellen werden Halbdesmosomen beobachtet, die sich in einem Prozeß der Abtrennung von ihrer normalen Lage an der Plasmamembran der basalen Karzinomzelle befinden. Nach der Abtrennung der Halbdesmosomen von dem basalen Plasmalemm in das subepitheliale Bindegewebe werden die Halbdesmosomen abgerundet, wobei die zytoplasmatische Haftplatte an ihrer inneren Circumferenz zu liegen kommt. Ein beständiges Charakteristikum der abgetrennten Halbdesmosomen ist das Fehlen von inserierenden Tonofilamenten. Häufig werden die abgestoßenen Halbdesmosomen in enger Assoziierung mit abgetrenntem, vielschichtigem Basalmembranmaterial vorgefunden. Während ihrer Migration in die tieferen Schichten der Lamina propria verlieren sie offensichtlich ihre deutliche Ultrastruktur. Nach diesen Beobachtungen führt die Abtrennung und nachfolgende Migration der Halbdesmosomen in das subepitheliale Bindegewebe zu einem Verlust der Epithel-Stroma-Adhäsion in invasiven Karzinomen des Larynx.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00456315
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  • 8
    Electronic Resource
    Electronic Resource
    Über das Schwefelmonoxyd. 4. Mitteilung. Die Oxydation des Schwefels (1934)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 220 (1934), S. 268-272 
    Details
    ISSN: 0863-1786
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Die Oxydation von Schwefel wird unter verschiedenen Bedingungen auf die Entstehung von Schwefelmonoxyd hin untersucht.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19342200307
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  • 9
    Electronic Resource
    Electronic Resource
    Synthesis of (R)-Sulforaphane Using [cpru(R, R)-CHIRAPHOS)]+ as Chiral AuxiliaryEnantioselective organic syntheses using chiral transition metal complexes, part 3. For part 2 see ref. [1]. (1997)
    Weinheim : Wiley-Blackwell
    Chemistry - A European Journal 3 (1997), S. 713-716 
    Details
    ISSN: 0947-6539
    Keywords: asymmetric synthesis ; dioxiranes ; ruthenium ; sulforaphane ; sulfoxides ; Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: A new enantioselective (80% ee) synthesis of (R)-sulforaphane and its epimer (S)-sulforaphane is described, which makes use of the pseudo-tetrahedral complex fragment [CpRu-(CHIRAPHOS)]+ as a chiral auxiliary. Reaction of the chloride complexes [CpRu(L-L)Cl] [L-L = 1,-bis(diphenylphosphino)ethane (dppe), (2S,3S)-and (2R,3R)-bis(diphenylphosphino)-butane ((S,S)- and (R, R)-CHIRAPHOS, respectively)] with phthalimidobutyl methyl sulfide gives the thioether complexes [CpRu(L-L)(MeSC4H8NPhth)]PF6. Oxygen transfer from dimethyldioxirane (DMD) produces the corresponding sulfoxide complexes in high yield and high diastereoselectivity. Cleavage of the phthaloyl group with aqueous hydrazine and subsequent reaction with thiophosgene yields the sulforaphane complexes [CpRu(L-L)(MeS(O)C4H8NCS)]PF6. Treatment of these with sodium iodide finally liberates the sulforaphane without noticeable racemization.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/chem.19970030510
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  • 10
    Electronic Resource
    Electronic Resource
    Van der Waals model for filled rubbers with modified interfacial contacts (1988)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 35 (1988), S. 345-362 
    Details
    ISSN: 0021-8995
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: It is shown how the global deformation mechanism in filler-loaded vulcanizates were modified by additional filler-to-matrix bonds. A quantitative description is given in terms of an extended van der Waals treatment including the formulation of a reduced mechanical equation of state. An interpretation of the Mullins softening is presented.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1988.070350206
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