Search Results - (Author, Cooperation:A. Guenther)

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  1. 1
    Staff View
    Publication Date:
    2016-04-12
    Publisher:
    Nature Publishing Group (NPG)
    Print ISSN:
    0028-0836
    Electronic ISSN:
    1476-4687
    Topics:
    Biology
    Chemistry and Pharmacology
    Medicine
    Natural Sciences in General
    Physics
    Keywords:
    Aerosols/chemistry ; Atlantic Ocean ; Atmosphere/*chemistry ; Nitrates/analysis/chemistry ; Nitric Acid/chemistry ; Nitrogen/*analysis/*chemistry ; Nitrogen Oxides/*analysis/*chemistry ; Nitrous Acid/analysis/chemistry ; North Carolina ; Oxidants/chemistry ; Photolysis ; Seawater/*chemistry ; South Carolina
    Published by:
    Latest Papers from Table of Contents or Articles in Press
  2. 2
    Staff View
    Publication Date:
    2018-12-11
    Publisher:
    American Physical Society (APS)
    Print ISSN:
    1098-0121
    Electronic ISSN:
    1095-3795
    Topics:
    Physics
    Keywords:
    Magnetism
    Published by:
    Latest Papers from Table of Contents or Articles in Press
  3. 3
    Bleisch, Siegfried ; Sillero, Maria A. Günther ; Torrecilla, Amparo ; Sillero, Antonio

    New York, NY [u.a.] : Wiley-Blackwell
    Published 1994
    Staff View
    ISSN:
    0263-6484
    Keywords:
    Gout ; purine nucleotide interconversion ; allopurinol ; xanthine oxidase ; CTP synthetase ; Chemistry ; Biochemistry and Biotechnology
    Source:
    Wiley InterScience Backfile Collection 1832-2000
    Topics:
    Biology
    Medicine
    Notes:
    The synthesis of uric acid from purine bases, nucleosides and nucleotides has been measured in reaction mixtures containing rat liver supernatant and each one of the following compounds at 1 mM concentration (except xanthine, 0·5 mM and guanosine and guanine, 0·1 mM). The rates of the reaction, expressed as nanomoles of uric acid synthesized g-1 of wet liver min-1 were: ATP, 10; ADP, 37; AMP, 62; adenosine, 108; adenine 6; adenylo-succinate, 9; IMP 32; inosine, 112; hypoxanthine, 50; GTP, 19; GDP, 19; GMP, 27; guanosine, 34; guanine, 72; XMP, 10; xanthosine, 24; xanthine, 144. These figures divided by 55 correspond to nanomoles of uric acid synthesized min-1 per mg-1 of protein. The rate of synthesis of uric acid obtained with each one of those compounds at 0·1 and 0·05 mM concentrations was also determined. ATP (1 nM) strongly inhibited uric acid synthesis from 0·05 mM AMP (91 per cent) and from 0·05 mM ADP (88 per cent), but not from adenosine. CTP or UTP (1 mM) also inhibited (by more than 90 per cent) the synthesis of uric acid from 0·05 mM AMP. Xanthine oxidase was inhibited by concentrations of hypoxanthine higher than 0·012 mM. The results favour the view that the level of uric acid in plasma may be an index of the energetic state of the organism. Allopurinol, besides inhibiting uric acid synthesis, reduced the rate of degradation of AMP. The ability of crude extracts to catabolize purine nucleotides to uric acid is an important factor to be considered when some enzymes related to purine nucleotide metabolism, particularly CTP synthase, are measured in crude liver extracts.
    Additional Material:
    4 Ill.
    Type of Medium:
    Electronic Resource
    URL:
    Articles: DFG German National Licenses
  4. 4
    Sillero, Antonio ; Sillero, María A. Günther ; Hernandorena, Arantxa

    New York, NY [u.a.] : Wiley-Blackwell
    Published 1993
    Staff View
    ISSN:
    0263-6484
    Keywords:
    Artemia ; purine nucleotide interconversion ; purine nucleosides ; adenosine ; guanosine ; inosine ; xanthosine ; diet ; mycophenolic acid ; Chemistry ; Biochemistry and Biotechnology
    Source:
    Wiley InterScience Backfile Collection 1832-2000
    Topics:
    Biology
    Medicine
    Notes:
    Artemia uses the stored diguanosine tetraphosphate as a source of adenine and guanine nucleotides during development from the encysted gastrula to the free swimming larva. Further development of the larvae depends on a dietary source of purine rings. We have investigated the growth of Artemia in axenic cultures supplemented with 0·6 mg ml-1 of adenosine, guanosine, inosine or xanthosine. The total protein and soluble nucleotide content of Artemia grown in the presence of adenosine, guanosine or inosine was very similar, around (2 A260 units and 500 mg protein) and (4 A260 units and 1000 mg protein) after 4 and 6 days of postlarval development, respectively. The nucleotide pattern of those extracts subjected to HPLC were almost identical, the major peaks corresponding to ATP, ADP and AMP. Other nucleotides, not well characterized, were also present in those extracts. Mycophenolic acid (10 μg ml-1) inhibited the growth of Artemia (as measured by their protein and soluble nucleotide content) in the presence of adenosine and inosine as the purine source, and had no appreciable effect in the presence of guanosine. A quantitative analysis of the chromatographic peaks obtained from Artemia grown in the presence of any of the three nucleosides ± mycophenolic acid showed that the effect of the antibiotic on each one of the chromatographic peaks was very similar, suggesting that Artemia, and probably other organisms as well, tend to maintain a balance between all nucleotides and to adjust the overall level to the limiting step(s) in their rates of synthesis/interconversion. Xanthosine was not able to support the development of Artemia.
    Additional Material:
    3 Ill.
    Type of Medium:
    Electronic Resource
    URL:
    Articles: DFG German National Licenses
  5. 5
    Staff View
    Type of Medium:
    article
    Publication Date:
    2003
    Keywords:
    Erinnerung ; Deutschunterricht ; Gegenwartsliteratur ; Lektüre ; Literatur ; Antisemitismus ; Mitgutsch, Waltraud Anna ; Österreich
    In:
    Informationen zur Deutschdidaktik, Bd. 27 (2003) H. 1, S. 97-100, 0721-9954
    Language:
    German
    Note:
    Literaturangaben
    FIS Bildung Literaturdatenbank
  6. 6
    Staff View
    Type of Medium:
    article
    Publication Date:
    2003
    Keywords:
    Sachinformation ; Gestein ; Archäometrie ; Bestimmung ; Naturwissenschaften ; Lumineszenz ; Physik ; Archäologie ; Alter ; Verfahren
    In:
    Praxis der Naturwissenschaften - Physik in der Schule, Bd. 52 (2003) H. 4, S. 160-166, 0177-8374
    1617-5689
    Language:
    German
    Note:
    Internetadressen
    FIS Bildung Literaturdatenbank
  7. 7
    Staff View
    Type of Medium:
    article
    Publication Date:
    2002
    Keywords:
    Sachinformation ; Chemie ; Magnesium ; Medizin ; Naturwissenschaften ; Werkstoff ; Anwendung ; Material
    In:
    Praxis der Naturwissenschaften - Chemie in der Schule, Bd. 51 (2002) H. 4, S. 20-24, 0177-9516
    1617-5638
    Language:
    German
    Note:
    Tabellen
    FIS Bildung Literaturdatenbank
  8. 8
    Staff View
    Type of Medium:
    article
    Publication Date:
    2003
    Keywords:
    Sachinformation ; Bestimmung ; Naturwissenschaften ; Physik ; Archäologie ; Alter ; Verfahren
    In:
    Biologie in unserer Zeit, Bd. 33 (2003) H. 5, S. 302-308, 0045-205X
    Language:
    German
    FIS Bildung Literaturdatenbank
  9. 9
    Staff View
    Type of Medium:
    book
    Publication Date:
    1985
    Keywords:
    Schulverwaltung ; Geschichte (Histor) ; Hochschulschrift ; Baden
    Language:
    German
    Note:
    Bonn, Univ., Diss., 1983.
    FIS Bildung Literaturdatenbank
  10. 10
    Staff View
    Type of Medium:
    article
    Publication Date:
    1989
    Keywords:
    Sachinformation ; Gestein ; Erdgeschichte ; Geochronologie ; Geowissenschaften ; Paläogeografie ; Physische Geografie ; Datierungsmethode ; Messverfahren ; Grafische Darstellung
    In:
    Geographische Rundschau, Bd. 41 (1989) H. 9, S. 507-512, 0016-7460
    Language:
    German
    FIS Bildung Literaturdatenbank
  11. 11
    Staff View
    Type of Medium:
    article
    Publication Date:
    1992
    Keywords:
    Methode ; Gestein ; Sedimentation ; Datierungsmethode ; Naturwissenschaften ; Radiolumineszenz ; Lumineszenz ; Physik ; Radiometrie ; Eiszeit ; Alter ; Datierung ; Verfahren
    In:
    Spektrum der Wissenschaft, (1992) H. 4, S. 40-48, 0170-2971
    Language:
    German
    Note:
    Literaturangaben
    FIS Bildung Literaturdatenbank
  12. 12
    Staff View
    Type of Medium:
    article
    Publication Date:
    2012
    Keywords:
    Liebe ; Deutschunterricht ; Gegenwartsliteratur ; Liebesgeschichte ; Romantik ; Novalis ; Schlegel, Friedrich von ; Deutschland
    In:
    Deutschmagazin, Bd. 9 (2012) H. 6, S. 18-21, 1613-0693
    Language:
    German
    FIS Bildung Literaturdatenbank
  13. 13
    Thiele, Günther A. [Verfasser] ; u.a. [Verfasser]
    Berlin : Landesbildstelle
    Published 1994
    Staff View
    Type of Medium:
    book
    Publication Date:
    1994
    Keywords:
    Medienarbeit ; Medienerziehung ; Medienpädagogik ; Außerschulische Jugendbildung ; Jugendarbeit ; Verzeichnis ; Institution ; Berlin
    Language:
    German
    Note:
    Register
    FIS Bildung Literaturdatenbank
  14. 14
    Staff View
    Publication Date:
    2018-06-22
    Publisher:
    American Physical Society (APS)
    Print ISSN:
    1050-2947
    Electronic ISSN:
    1094-1622
    Topics:
    Physics
    Keywords:
    Quantum optics, physics of lasers, nonlinear optics, classical optics
    Published by:
    Latest Papers from Table of Contents or Articles in Press
  15. 15
    Staff View
    Publication Date:
    2018-04-12
    Publisher:
    American Association for the Advancement of Science (AAAS)
    Electronic ISSN:
    2375-2548
    Topics:
    Natural Sciences in General
    Published by:
    Latest Papers from Table of Contents or Articles in Press
  16. 16
    Sümpelmann, R. ; Günther, A. ; Zander, R.

    Oxford : Blackwell Science Ltd
    Published 2000
    Staff View
    ISSN:
    1365-2044
    Source:
    Blackwell Publishing Journal Backfiles 1879-2005
    Topics:
    Medicine
    Notes:
    Erythrocyte sedimentation rates from 40 suspensions of packed red blood cells in modified fluid gelatin, 4% albumin solution, 6% hydroxyethyl starch and normal saline were measured at room temperature using Westergren's method. The erythrocyte sedimentation rate was extremely high in gelatin and this increase was significant after 10–60 min when compared with the other fluids. Erythrocyte sedimentation rates in albumin, hydroxyethyl starch and normal saline were low and there were no differences between these fluids [erythrocyte sedimentation after 60 min, median (interquartile range): gelatin 128 (111.2–130.0) mm, albumin 2 (1.5–2.0) mm, hydroxyethyl starch 1.5 (1.0–1.6) mm, normal saline 2 (1.9–2.5) mm, p 〈 0.0001]. The addition of twice the volume of modified fluid gelatin to a volume of red blood cells leads to rapid acceleration of the erythrocyte sedimentation rate. This is caused by increased erythrocyte aggregation, and in clinical practice this effect may be useful for the haemoconcentration of diluted blood from cardiopulmonary bypass circuits or cell-saver autotransfusion in paediatric surgery.
    Type of Medium:
    Electronic Resource
    URL:
    Articles: DFG German National Licenses
  17. 17
    Haschke, M. R. ; Scheuber, E. ; Günther, A. ; Reutter, K.-J.

    Malden USA : Blackwell Science Ltd
    Published 2002
    Staff View
    ISSN:
    1365-3121
    Source:
    Blackwell Publishing Journal Backfiles 1879-2005
    Topics:
    Geosciences
    Notes:
    Tectonomagmatic similarities between the modern Chilean flat-slab region and pre-Neogene magmatic episodes suggest that they represent analogues to flat subduction. Evolutionary patterns in each magmatic suite include (i) increasing La/Yb ratios and Sr-and Nd-isotopic enrichment through time, (ii) eastward-migration of magmatism after periods of transpressional/transtensional intra-arc deformation, and (iii) subsequent termination and virtual absence of main-arc activity for 5–10 Myr. These patterns may reflect slab shallowing followed by flat subduction and thickening of the overlying crust. If repeated, they require interchanging episodes of slab steepening. Increasing convergence rates force slab kinking and eventual failure of the oversteepened slab, followed by rebound of the slab tip (owing to lack of further slab pull), flat subduction and termination of subduction-related magmatism. Rapid subduction leads to shallow overriding of the detached slab fragment. Eclogitization of the gradually steepening slab tip at depth and subsequent slab pull permits asthenospheric corner flow and subduction-related magmatism.
    Type of Medium:
    Electronic Resource
    URL:
    Articles: DFG German National Licenses
  18. 18
    WAGNER, GÜNTHER A.

    [s.l.] : Nature Publishing Group
    Published 1971
    Staff View
    ISSN:
    1476-4687
    Source:
    Nature Archives 1869 - 2009
    Topics:
    Biology
    Chemistry and Pharmacology
    Medicine
    Natural Sciences in General
    Physics
    Notes:
    [Auszug] This event occurred at approximately 11 a.m. in the entrance hall of the Plockenhaus, a restaurant below the Plockenpass in the Carnic Alps (Austria). Students from a field trip of the Geology Department of the Universitat Heidelberg were staying inside this restaurant because of a thunderstorm ...
    Type of Medium:
    Electronic Resource
    URL:
    Articles: DFG German National Licenses
  19. 19
    GÜNTHER, A.

    [s.l.] : Nature Publishing Group
    Published 1897
    Staff View
    ISSN:
    1476-4687
    Source:
    Nature Archives 1869 - 2009
    Topics:
    Biology
    Chemistry and Pharmacology
    Medicine
    Natural Sciences in General
    Physics
    Notes:
    [Auszug] I AM indebted to Dr. John Murray for drawing my attention to an error in the address which I had the honour of delivering before the Linnean Society on May 24. In referring to the discovery and subsequent remarkable disappearance of the Tile-fish (Lopholatilus chamœleonticeps), I stated that ...
    Type of Medium:
    Electronic Resource
    URL:
    Articles: DFG German National Licenses
  20. 20
    Staff View
    ISSN:
    1432-1440
    Keywords:
    Insulin infusion pump ; Implantation ; CSII ; Intravenous, intraperitoneal insulin infusion
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Medicine
    Notes:
    Summary Five type I diabetic patients were followed prospectively during treatment with continuous subcutaneous insulin infusion by externally worn pumps and during the first 12 months after implantation of a remote-controlled insulin infusion device (ID1, Siemens AG). Stabilized insulin (Hoe 21 GH, Hoechst AG) was infused intravenously in two and intraperitoneally in three patients. Total observation time was 47.2 patient-months after implantation. Two devices had to be explanted prematurely, one because of a technical failure after 101 days, one due to a skin necrosis over the implant after 236 days. HbA1, frequency of hypoglycemia, total insulin dose, and basal rate infusion did not change after implantation. There was a reduction in the insulin antibodies 6 months after start of intravenous or intraperitoneal insulin delivery. Fasting plasma free insulin levels could be normalized only by intraperitoneal insulin infusion. Although a technical and a surgical problem was observed, our data show the successful implantation and clinical use of programmable dosing devices and stabilized insulin.
    Type of Medium:
    Electronic Resource
    URL:
    Articles: DFG German National Licenses