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  • 1980-1984  (50)
  • 1960-1964  (22)
  • 1915-1919  (12)
  • 1905-1909  (50)
  • 1860-1869  (3)
  • Inorganic Chemistry  (134)
  • DNA  (3)
  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 323 (1963), S. 57-64 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: The degree of electric charging of metal surfaces due to retarding of neutral metallic and semiconducting particles having various velocities has been determined. The effects are supposed to result from the exo-emission of electrons the amount of which depends on the velocities, masses, and impact angles of the particles.From the strong differences between the reactivities of solid substances during and after mechanical working it is concluded that the observed exo-emission is caused by exitation states at submicroscopic surface points.
    Notes: Die elektrische Aufladung von Metalloberflächen bei der Impuls-Bremsung nicht geladener, fliegender, metallischer und halbleitender Partikel verschiedener Geschwindigkeiten wird gemessen. Die beobachteten Erscheinungen lassen sich aus der Exo-Emission von Elektronen herleiten. Diese ergibt sich u. a. aus dem Zusammenhange zwischen der Elektronen-Austrittsarbeit der beteiligten Partner und der Größe der gebremsten Impulse. Die Ladungs-Übergänge hängen Übersichtlich vom Quadrat der Geschwindigkeiten, von der Masse und vom Auftreffwinkel der Körner ab. Einflüsse mechanischer Vorbehandlung der Festkörper, entsprechend früheren Beobachtungen, werden bestätigt.Im Zusammenhange mit den beobachteten großen Unterschieden des Reaktionsvermögens von Festkörpern während der Bearbeitung und nach ihrem Abschluß lassen die beobachteten Exo-Emissionen auf das Auftreten erhöhter Anregungszustände an submikroskopischen Orten während der Impuls-Bremsung schließen.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 51 (1918), S. 1571-1587 
    ISSN: 0365-9496
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 52 (1919), S. 1249-1255 
    ISSN: 0365-9631
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Archives of dermatological research 276 (1984), S. 52-56 
    ISSN: 1432-069X
    Keywords: Fluorometry ; DNA ; 4′-6-Diamidino-2-phenylindole ; Fibroblasts ; Epidermis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary 4′-6-diamidino-phenylindole (DAPI) which is used for the detection of mycoplasmic infections of cell cultures or cytofluorometric investigations proved to be a sensitive agent for the fluorometric assay of alkali extracted DNA in cultured cells and human epidermis. Various experiments to optimize assay conditions led to the following procedure: 1 part of freeze dried tissue (1 mg/ml) and 1 part of 0.2 mol/l NaOH (w/v) were heated at 95° for 40 min. After cooling for 1 h to room temperature, 0.1 ml alkaline extract was mixed with 2.9 ml DAPI-solution (0.2 μg/ml in McIlvaine buffer containing 1 mmol/l MgCl2). After 10 min in the dark the emitted fluorescence was estimated at 453 nm with an excitation at 360 nm. This assay procedure allowed a detection limit of 25 ng DNA.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Planta 152 (1981), S. 1-7 
    ISSN: 1432-2048
    Keywords: Auxin ; Cytokinin ; DNA ; Nicotiana RNA ; Protoplasts
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Tobacco mesophyll protoplasts cultivated in vitro do not synthesize a measurable quantity of chloroplastic ribosomal RNA, but actively synthesize cytoplasmic ribosomal RNA, polyadenylated RNA, and proteins. These syntheses are essentially independent of the presence of hormones in the culture medium and are thus related to the ageing phenomenon induced by isolation from the plant and in-vitro culture. At all stages of culture and in all culture media, protoplasts incorporate low levels of thymidine into their DNA. However, the incorporation of considerable quantities of thymidine, indicative of the S phase, only takes place after 25–30 h and requires the presence of auxin and cytokinin.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Breast cancer research and treatment 4 (1984), S. 79-88 
    ISSN: 1573-7217
    Keywords: breast ; carcinoma ; DNA ; kinetics ; ploidy ; receptors
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The S-phase fraction (SPF) measured by flow cytometry of DNA and the thymidine labeling index (TLI) measured autoradiographically indicate the proportion of carcinoma cells currently synthesizing DNA and reflect the rate of proliferation. The TLI and SPF are lognormally distributed. The median TLI performed to maximize precursor uptake is near 5% (5 labeled carcinoma cells per 100), the mean near 7%, and the range from less than 1% to near 40%. Corresponding values for the SPF measured by DNA flow cytometry are slightly higher when appropriate measures are taken to reduce background debris counts and other artefacts. Residual elevation of SPF above TLI may result from S-phase arrested cells. Flow cytometric histograms show that clearly aneuploid cell lines exist in 50–80% of primary breast carcinomas. Aneuploid breast carcinomas have higher mean TLI than diploid breast carcinomas, and therefore proliferate more rapidly. They also more frequently lack estrogen receptor (ER). Carcinomas with minimal nuclear anaplasia, particularly those of tubular, mucinous, infiltrating lobular and adenocystic types have low TLI and SPF, whereas carcinomas with highly anaplastic nuclei, including medullary carcinomas, have high TLI and SPF. TLI and SPF correlate inversely with ER and PgR content, have no relationship to axillary lymph nodal status, and have a weak positive correlation with tumor size and a weak negative correlation with age. High TLI predicts a high risk of early relapse after primary therapy for both node-negative and node-positive carcinomas. Carcinomas that produce brain metastases have particularly high TLI. Current evidence suggests that high SPF and aneuploidy may prove to have prognostic significance like TLI.
    Type of Medium: Electronic Resource
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  • 7
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: D-Glucose, D-Galaktose, D-Mannose und 4.6-Benzal-α-D-glucose reagierten mit 2-Mercapto-äthylamin unter Bildung von Thiazolidin-Derivaten. Der Konstitutionsbeweis wurde durch Desulfurierung der Acetate mit Raney-Nickel erbracht, die zu den entsprechenden Hexitderivaten führte. Der Glucosederivat III entstehende I-[N-äthyl-acetamino]-2.3.4.5.6-penta-O-acetyl-1-desoxy-D-sorbit (IV) wurde auf einem unabhängigen Wege aus 1-äthylamino-1-desoxy-D-glucose erhalten.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 94 (1961), S. 3293-3297 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Die Synthese der genannten Anomeren erfolgte durch Benzylidierung und Glykosidierung des N-Formyl-D-glucosamins und alkalische Hydrolyse der N-Formyl-Gruppe.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 94 (1961), S. 1676-1682 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Die katalytische Hydrierung der aromatisch kondensierten 1.4-Oxazinone-(2) (Azacumarine) führt zu ihren 3.4-Dihydroderivaten, den Morpholonen-(2), die auch als Lactone der entsprechenden N-[o-Hydroxyl-aryl]-α-aminosäuren beschrieben werden können. Hydrierung der 1.4-Benzoxazinone-(2) mit Lithiumaluminiumhydrid liefert unter Öffnung des Lactonringes N-substituierte 1.2-Aminoalkohole.
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 95 (1962), S. 985-995 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Racem. Tetralin-p-chinol wird über die Strychninsalze der sauren 3-Nitro-phthal-säureester in die optischen Antipoden zerlegt. Die Konfiguration und Konformation der Antipoden wird diskutiert und zur Konfiguration und Konformation der östra-p-chinole auf Grund des optische Verschiebungssatzes und der Rotationsdispersion in Beziehung gesetzt. Daraus ergibt sich die absolute Konfiguration der Antipoden des Tetralin-p-chinols.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
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