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  • Articles: DFG German National Licenses  (35)
  • 1995-1999  (32)
  • 1970-1974  (3)
  • 1
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 5 (1998), S. 292-299 
    ISSN: 1089-7674
    Source: AIP Digital Archive
    Topics: Physics
    Notes: By using a particle-in-cell simulation code which includes tunneling ionization, it is found that strong wake fields are excited and amplified due to the modulation of an intense laser pulse induced by an ionizing plasma in the regime where the matching condition between laser pulse length (LLaser) and plasma wavelength (λp), i.e. LLaser≤λp is not satisfied. The modulation is characterized by a gradual steepening of the pulse front where there is a copropagating density gradient which is due to the rapid plasma formation from ionization there. Accordingly, the wake field is convectively amplified to a significant level. This amplification of plasma waves always occurs, more or less, for laser propagation in ionizing plasmas. © 1998 American Institute of Physics.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 2 (1995), S. 3100-3105 
    ISSN: 1089-7674
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The self-similar distribution of electrons is found for a nonuniform underdense plasma that is heated by an intensive laser field. The distribution function is flat-topped for the low-energy electrons. And in the high-energy region, it has a well-pronounced high-energy tail. It is also found how the electron heat flux and the absorption coefficient depend upon both the ratios of electron mean-free path to the inhomogeneity scale of effective temperature and of the oscillation velocity to the thermal velocity. The actual shapes of electron energy distribution, the heat flux limitation, and the electromagnetic radiation absorption rate are given, both for a currentless plasma and for a plasma with a finite electric current. © 1995 American Institute of Physics.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Journal of the American Chemical Society 93 (1971), S. 3074-3075 
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Oxford UK : Blackwell Science Ltd
    Alimentary pharmacology & therapeutics 13 (1999), S. 0 
    ISSN: 1365-2036
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: : To examine gastric mucosal ulcerogenic responses to indomethacin and HCl/ethanol in adjuvant arthritic (AA) rats.〈section xml:id="abs1-2"〉〈title type="main"〉Methods and Results: Arthritis was induced in male Dark Agouti (DA) rats by injection of Freund's complete adjuvant (FCA) into the right hind paw. The gastric ulcerogenic response to indomethacin was markedly worsened in AA rats, depending on the degree of arthritic change. This aggravation of indomethacin-induced gastric lesions in AA rats was significantly prevented by NG-nitro-L-arginine methyl ester (L-NAME) and amino-guanidine as well as dexamethasone. In contrast, the mucosal ulcerogenic response to HCl/ethanol was inhibited in AA rats. The suppression of HCl/ethanol-induced gastric lesions in AA rats was reversed almost totally by L-NAME and aminoguanidine as well as dexamethasone and partly by indomethacin. The expression of inducible nitric oxide synthase (iNOS) mRNA was observed in the stomach of AA rats but not of normal rats. Moreover, the luminal releases of nitric oxide (NO) metabolites as well as prostaglandin (PG) E2 were significantly increased in AA rats.〈section xml:id="abs1-3"〉〈title type="main"〉Conclusions: The gastric mucosal ulcerogenic responses were modified in AA rats, in different manners depending on the irritants; an increase in response to indomethacin and a decrease in response to HCl/ethanol. These changes may both be accounted for by increased production of NO by iNOS, and the latter is also partly related to increased production of PGs.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Journal of the American Chemical Society 95 (1973), S. 5428-5430 
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 6
    ISSN: 1741-2358
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Objectives:To determine the effect of water fluoride concentration on the fluoride profile across the entire thickness of the cementum and root dentine of human permanent anterior teeth in adults. Subjects:Twenty-eight human permanent anterior teeth from individuals aged from 30 to over 60 years were studied. Setting:Teeth were obtained from a natural high-fluoride area (West Hartlepool, UK; 1.0–1.3 ppm F in drinking water, WHP) and the other from a non-fluoridated naturally low fluoride area (Leeds, UK; 0.1 ppm F in drinking water, LDS). Design:Cementum and root dentine were sampled using an abrasive micro-sampling technique from the cementum surface to the pulpal surface of root dentine. Results:Fluoride concentration was higher in tooth roots (the cementum and dentine) taken from the naturally fluoridated area (WHP) than from the non-fluoridated area (LDS). Age and average fluoride concentration showed a positive correlation in WHP dentine, middle region of the root (r = 0.78, P 〈 0.001) and in the apical region of the root (r = 0.67, P 〈 0.05). WHP cementum had the strongest fluoride concentration correlation with age in the cervical region of the root (r = 0.67, P 〈 0.01). An analysis of variance (ANOVA) showed that the area (water fluoride content), age and number of years lived in the area combined with total age were significant. Conclusions: The fluoride content of cementum and root dentine in adult residents is related to fluoride content in drinking water.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Physiologia plantarum 93 (1995), S. 0 
    ISSN: 1399-3054
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: We have isolated and characterized a transcribed segment of mitochondrial DNA (mtDNA) from apple (cv. ‘Delicious’) that contains the atp9 gene, and exons a and b of the nad5 gene. Analysis of the cDNA of the atp9 revealed 8 C to U transcript editing events resulting in 7 amino acid changes, and a new stop codon that eliminates 8 carboxy-terminal residues, compared to the genomic sequence. The transcription patterns of atp9, and exons a and b of nad5 share RNA species, indicating that these sequences are part of the same transcriptional unit.
    Type of Medium: Electronic Resource
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  • 8
    ISSN: 1432-5195
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Résumé La structure et la répartition précises des lymphatiques dans les membranes synoviales des articulations du genou chez le singe et des articulations du genou chez l'être humain avec ostéoarthrite (OA) ou arthrite rhumatoïde (RA) ont été étudiées par microscopie optique et électronique en utilisant la méthode d'enzymes histochimiques. La totalité des préparatifs du support et des sections de tissus de la membrane synoviale fut doublement coloré pour une activité de 5′-nucléotidase (5′-Nase) et de phosphatase alcaline (AL-Pase). Les lymphatiques de 5′-Nase-positifs furent clairement distingués des vaisseaux sanguins AL-Pase-positifs dans les spécimens à la fois du singe et de l'être humain. Dans la membrane synoviale du singe, les lymphatiques de 5′-Nase-positifs étaient distribués de manière dense dans les régions médiales et latérales de la poche suprapatellaire et dans le coussin adipeux infrapatellaire. Ces lymphatiques furent détectés dans les régions superficielles et profondes de la couche cellulaire du sous-revêtement. En outre, des vaisseaux lymphatiques collecteurs étaient bien développés dans la couche fibreuse profonde et dans l'épimysium de fusionnement. Dans la membrane synoviale des genoux de l'être humain avec OA ou RA, les modèles de répartition des lymphatiques furent essentiellement les mêmes que ceux trouvés chez le singe. Dans la villosité bien développée des membranes synoviales typiques de RA, aucun lymphatique ne fut détecté mais de nombreux vaisseaux sanguins furent clairement identifiés.
    Notes: Summary The fine structure and distribution of lymphatics in the synovial membrane of monkey knee joints, and human knees with osteoarthritis and rheumatoid arthritis, were studied by light and electron microscopy using an enzyme-histchemical method. Whole mount preparations and tissue sections were doubly stained for 5′-nucleotidase and alkaline phosphatase. The 5′-nucleotidase positive lymphatics could be distinguished from the alkaline phosphatase positive blood vessels. In monkey specimens the 5′-nucleotidase lymphatics were densely distributed in the medial and lateral parts of the suprapatellar pouch and infrapatellar fat pad, in both the superficial and deep of the sublining cell layers. Collecting lymphatics were well developed in the deep fibrous layer and in the merging epimysium. In the knees with both types of arthritis, the patterns of distribution were the same as in the monkey. No lymphatics were found in well developed villi in rheumatoid arthritis, but many blood vessels were present.
    Type of Medium: Electronic Resource
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  • 9
    ISSN: 1432-1920
    Keywords: Key words Magnetic resonance imaging ; Leukoencephalopathy ; Methotrexate ; Acute myeloblastic leukemia
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract A patient with acute myeloblastic leukaemia showed atypical findings on MRI following combination therapy including intrathecal methotrexate and radiation. MRI findings not previously been reported are ring as well as patchy enhancement, marked mass effect and lesions extending to the putamen and corpus callosum.
    Type of Medium: Electronic Resource
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  • 10
    ISSN: 1432-1920
    Keywords: Magnetic resonance imaging ; Leukoencephalopathy ; Methotrexate ; Acute myeloblastic leukemia
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract A patient with acute myeloblastic leukaemia showed atypical findings on MRI following combination therapy including intrathecal methotrexate and radiation. MRI findings not previously been reported are ring as well as patchy enhancement, marked mass effect and lesions extending to the putamen and corpus callosum.
    Type of Medium: Electronic Resource
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