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  • Chemistry  (2)
  • gastric lymphoma  (2)
  • Best. von Nitroverbindungen, aromat.  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Annals of oncology 8 (1997), S. 41-44 
    ISSN: 1569-8041
    Keywords: Epstein–Barr virus ; gastric lymphoma ; Helicobacter pylori ; mucosa-associated lymphoid tissue
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Background: Helicobacter pylori (H. pylori) infection has been postulatedto be a pathogenetic factor in gastric lymphoma. However, the etiologicalfactors for gastric lymphoma could vary in different populations. Materials and methods: We looked for histological evidence of H. pyloriinfection in 53 gastrectomy specimens from Hong Kong Chinese patients withprimary gastric B-lymphoma. We also screened for Epstein–Barr virus(EBV) in these cases using in situ hybridization with oligonucleotide probesfor EBV-encoded small RNA1 and 2. Results: H. pylori was found in 29/53 (55%), including 8/13(62%) cases of low-grade lymphoma of mucosa-associated lymphoidtissue (MALT) type. These infection rates in gastric lymphoma are lower thanthose reported in Western populations (80%–100%) andcomparable to that found in healthy Chinese blood donors (55%) or innon-ulcer dyspeptic patients (52%–57%). EBV was found intumor cells only in one case of high-grade gastric lymphoma with low-gradeMALT component which was H. pylori-negative, and in occasional nontumorlymphoid cells in 7 other cases. Conclusions: These results suggest that (1) the role of H.pylori in pathogenesis of gastric lymphoma may vary in different populations;(2) very few gastric lymphomas are associated with EBV; (3) not all low-gradegastric MALT lymphomas are H. pylori-dependent.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Annals of oncology 8 (1997), S. 41-44 
    ISSN: 1569-8041
    Keywords: Epstein–Barr virus ; gastric lymphoma ; Helicobacter pylori ; mucosa-associated lymphoid tissue
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Background: Helicobacter pylori (H. pylori) infection has been postulated to be a pathogenetic factor in gastric lymphoma. However, the etiological factors for gastric lymphoma could vary in different populations. Materials and methods: We looked for histological evidence of H. pylori infection in 53 gastrectomy specimens from Hong Kong Chinese patients with primary gastric B-lymphoma. We also screened for Epstein–Barr virus(EBV) in these cases using in situ hybridization with oligonucleotide probes for EBV-encoded small RNA1 and 2. Results: H. pylori was found in 29/53 (55%), including 8/13(62%) cases of low-grade lymphoma of mucosa-associated lymphoid tissue (MALT) type. These infection rates in gastric lymphoma are lower than those reported in Western populations (80%–100%) and comparable to that found in healthy Chinese blood donors (55%) or in non-ulcer dyspeptic patients (52%–57%). EBV was found in tumor cells only in one case of high-grade gastric lymphoma with low-grade MALT component which was H. pylori-negative, and in occasional nontumor lymphoid cells in 7 other cases. Conclusions: These results suggest that (1) the role of H. pylori in pathogenesis of gastric lymphoma may vary in different populations;(2) very few gastric lymphomas are associated with EBV; (3) not all low-grade gastric MALT lymphomas are H. pylori-dependent.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Fresenius' Zeitschrift für analytische Chemie 280 (1976), S. 30-30 
    ISSN: 1618-2650
    Keywords: Best. von Nitroverbindungen, aromat. ; Volumetrie ; Reduktion mit Fe(II)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 398 (1973), S. 72-82 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Organische Derivate des Zinns. III. Reaktionen des Trialkylzinnäthoxids mit Aminoalkoholen.Die Reaktionen von Tributylzinnäthoxid, Bu3SnOC2H5, mit N,N-Dialkylaminoalkoholen ergeben Bu3SnORNR2- (R = s. Abstract). Bei Reaktionen von Bu3SnOC2H5 mit N-Methyläthanolamin, HOCH2 · CH2NHMe, und verschiedenen Aminoalkoholen, HORNH2 (R = s.Abstract) reagieren sowohl Hydroxyl- wie auch Aminogruppen unter Bildung von Verbindungen wie Bu3SnOCH2 · CH2NHMe, Bu3SnOCH2 · CH2NMeSnBu3, Bu3SnO · R · NH2, Bu3SnO · R · NH · SnBu3 bzw. Bu3SnO · R · N(SnBu3)2. Mit o-Aminophenol wird nur Bu3SnO · C6H4NH2 gebildet.
    Notes: The reactions oi tributyltin ethoxide, Bu3SnOEt, with N,N-dialkylalkanolamines, HORNR2 (where R = —CH2 · CH2—, —CH2 · CH2 · CH2— and —CH2 · MeCH—; R = —CH3 and —C2H5) give Bu3SnORNR2. In reactions of Bu3SnOEt with N-methylethanolamine, HOCH2 · CH2NHMe, and various alkanolamines, HO · R · NH2, (where R = —CH2 · CH2— —CH2 · CH2 · CH2—, —CHMe · CH2— —CH2 · Me2C— and —CH2 · CH · CH2 · Me) both the hydroxy as well as the amino groups show reactivity to form products of the type: Bu3SnOCH2 · CH2NHMe, Bu3SnOCH2 · CH2NMeSnBu3, Bu3SnO · R · NH2, Bu3SnO · R · NHSnBu3, and Bu3SnO · R · N(SnBu3)2, respectively. The reaction between Bu3SnOEt and o-aminophenol yields only Bu3SnO · C6H4NH2.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Chichester [u.a.] : Wiley-Blackwell
    Journal of Raman Spectroscopy 13 (1982), S. 25-29 
    ISSN: 0377-0486
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: An analysis of the Raman and infrared spectra of di-potassium tartrate hemi-hydrate (DKT), K2C4H4O6·½H2O, is reported. It has been inferred that the C4H4O62- ion and H2O molecule in a DKT crystal occupy points of C1 site symmetry. Various units of C4H4O62- ion/(H2O molecule) located at crystallographically distinguishable positions in this crystal do not appear to be different in their structure or the force fields governing their vibrational dynamics.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
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