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  • 1
    Electronic Resource
    Electronic Resource
    The Interactions Between pi-Mesons and Nucleons (1954)
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Nuclear and Particle Science 4 (1954), S. 219-270 
    Details
    ISSN: 0066-4243
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1146/annurev.ns.04.120154.001251
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  • 2
    Electronic Resource
    Electronic Resource
    Glucosylation of Rho proteins by Clostridium difficile toxin B (1995)
    [s.l.] : Nature Publishing Group
    Nature 375 (1995), S. 500-503 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] FIG. 1 ToxB-induced decrease of C3-catalysed ADP-ribosylation of RhoA. Influence of a, cytosol and b, various hexoses. RhoA was incubated with ToxB in the presence of either cytosol, a cytosolic fraction or in the presence of various UDP-hexoses followed by C. ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/375500a0
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  • 3
    Electronic Resource
    Electronic Resource
    Escape of Pseudotolithus Senegalensis (C. and V.) from Trawl Nets in a Nigerian Fishery (1962)
    [s.l.] : Nature Publishing Group
    Nature 193 (1962), S. 955-956 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] IN order to control the rational exploitation of the stocks of a tropical demersal fishery the importance of the early establishment of appropriate mesh-size regulations has already been stated1. Trawl catches from the coastal waters of Nigeria include a large variety of species, as is typical of a ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/193955a0
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  • 4
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    COMMUNITY DEVELOPMENT IN OKIGWI (1951)
    London : Periodicals Archive Online (PAO)
    Community development journal. 2:4 (1951:Sept.) 73 
    Details
    ISSN: 0010-3802
    Topics: Political Science , Sociology
    URL: http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&res_dat=xri:pao:&rft_dat=xri:pao:article:6076-1951-002-04-000004
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  • 5
    Electronic Resource
    Electronic Resource
    Interleukin-4 gene polymorphisms in Japanese and Caucasian patients with aggressive periodontitis (2004)
    Oxford, UK : Munksgaard International Publishers
    Journal of clinical periodontology 31 (2004), S. 0 
    Details
    ISSN: 1600-051X
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Objectives: Recently, interleukin (IL) 4 gene polymorphisms have been analyzed in association with periodontitis. Genetic differences between Caucasian and Japanese patients with periodontitis have previously been detected. The aim of the present study was to analyze IL-4 genotypes in Caucasian and Japanese patients with aggressive periodontitis (AgP).Material and Methods: One hundred and twenty-four subjects were included in the study, 31 Japanese and 30 Caucasian patients with generalized AgP, plus 30 Japanese and 33 Caucasian healthy controls. IL-4 polymorphisms were determined by polymerase chain reaction. A logistic regression was used to investigate the possible association of the genotypes with the disease in both populations. Odds ratio (OR) estimates were analyzed for allele frequencies.Results: No significant association of IL-4 polymorphisms with the risk of AgP was determined in either population. However, the allele frequencies showed different results between populations. The carriage of the polymorphism in intron 2 was higher in Caucasian patients compared with controls (OR: 2.0, 95% confidence interval: [1.0;4.2]. Furthermore, the frequency of the IL-4 promoter/intron 2 composite genotype (PP+/IP+) in patients and controls, respectively, was found to be approximately 25% and 60% higher in the Japanese population than in the Caucasian population.Conclusion: There was no evidence of an association of IL-4 genotypes and AgP in either population, although the frequencies of the IL-4 genotypes in the Japanese and the Caucasians were different.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1600-051X.2004.00492.x
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  • 6
    Electronic Resource
    Electronic Resource
    Dynamic holography with nonplane waves in sillenites (1996)
    Springer
    Optical and quantum electronics 28 (1996), S. 25-42 
    Details
    ISSN: 1572-817X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology , Physics
    Notes: Abstract A three-dimensional model describing two-wave mixing in photorefractive crystals with finite beams of arbitrary shape is presented. The well-known longitudinal and transverse geometries are generalized by allowing an arbitrary orientation of the local grating vector. The coupled equations for the wave amplitudes are solved numerically in the small-angle approximation by introducing the light paths as characteristics. The influence of amplitude distributions and phase-front curvatures as well as the influence of geometrical arrangements and crystal properties (i.e. optical activity, externally applied voltage) on the energy exchange and the evolution of the polarization states is investigated. It is demonstrated that scanning the cross-section of the finite signal beam behind the crystal allows analysis of the coupling process inside the crystal which cannot be studied directly. The results of experiments with finite beams carried out on a BSO crystal are in good agreement with the numerical calculations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00578548
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  • 7
    Electronic Resource
    Electronic Resource
    The value of sodium pertechnetate Tc99m scans in the diagnosis of Meckel's diverticulum (1996)
    Springer
    Pediatric surgery international 11 (1996), S. 240-242 
    Details
    ISSN: 1437-9813
    Keywords: Meckel's diverticulum ; Diagnosis ; Technetium scan
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract A retrospective study was conducted of our experience with sodium pertechnetate Tc99m scans for diagnosing suspected Meckel's diverticula. Seventy-seven cases scanned between 1979 and 1994 were reviewed. Eighty per cent of the group presented with bleeding per rectum, 12% with pain, and 6.5% with anaemia. Ten scans were positive with 7 true-positive and 3 false-positive. Of the 67 negative scans, 3 were false-negatives. There were six Meckel's diverticuli and four duplication cysts between the true-positive and false-negative groups. All presented with major gastrointestinal (GI) bleeding and gastric mucosa was identified on histology. The three false-positive cases had inappropriate laparotomies on the basis of scan results. The test sensitivity was 70% with a specificity of 95%, giving an overall accuracy of 92%. The Meckel's scan is a useful investigation for GI bleeding in children. Surgical intervention should be guided by the full clinical picture and the scan, rather than the scan result alone.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00178427
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  • 8
    Electronic Resource
    Electronic Resource
    Investigation of two-wave mixing in arbitrary oriented sillenite crystals (1996)
    Springer
    Applied physics 64 (1996), S. 49-56 
    Details
    ISSN: 0340-3793
    Keywords: PACS: 42.40 ; 42.65 ; 42.70
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract.  A generalized systematic description of the Two-Wave Mixing (TWM) process in sillenite crystals allowing for arbitrary orientation of the grating vector is presented. An analytical expression for the TWM gain is obtained for the special case of plane waves in a thin crystal (∣g∣d≪1) with large optical activity (∣g∣/ϱ≪1, g is the coupling constant, ϱ the rotatory power, d the crystal thickness). Using a two-dimensional formulation the scope of the nonlinear equations describing TWM can be extended to finite beams in arbitrary geometries and to any crystal parameters. Two promising applications of this formulation are proposed. The polarization dependence of the TWM gain is used for the flattening of Gaussian beam profiles without expanding them. The dependence of the TWM gain on the interaction length is used for the determination of the crystal orientation. Experiments carried out on Bi12GeO20 crystals of a non-standard cut are in good agreement with the results of modelling.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003400050144
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  • 9
    Electronic Resource
    Electronic Resource
    Identification and characterization of PaMTH1, a putative O-methyltransferase accumulating during senescence of Podospora anserina cultures (2000)
    Springer
    Current genetics 37 (2000), S. 200-208 
    Details
    ISSN: 1432-0983
    Keywords: Key wordsPodospora anserina ; Age dependent ; Copper ; Methyltransferase
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract A differential protein display screen resulted in the identification of a 27-kDa protein which strongly accumulates during the senescence of Podospora anserina cultures grown under standard conditions. After partial determination of the amino-acid sequence by mass-spectrometry analysis of trypsin-generated fragments, pairs of degenerated primers were deduced and used to amplify parts of the sequence coding for the protein. These PCR products were utilized to select specific cDNA and genomic clones from DNA libraries of P. anserina. A subsequent DNA-sequence analysis revealed that the 27-kDa protein is encoded by a discontinuous gene, PaMth1, capable of coding for 240 amino acids. The first three amino-terminal residues appear to be removed post-translationally. The deduced amino-acid sequence shows significant homology to S-adenosylmethionine (SAM)-dependent methyltransferases. We hypothesize that the 27-kDa protein, PaMTH1, is involved in age-related methylation reactions protecting aging cultures against increasing oxidative stress.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002940050520
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  • 10
    Electronic Resource
    Electronic Resource
    Observed and simulated multidecadal variability in the Northern Hemisphere (2000)
    Springer
    Climate dynamics 16 (2000), S. 661-676 
    Details
    ISSN: 1432-0894
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract  Analyses of proxy based reconstructions of surface temperatures during the past 330 years show the existence of a distinct oscillatory mode of variability with an approximate time scale of 70 years. This variability is also seen in instrumental records, although the oscillatory nature of the variability is difficult to assess due to the short length of the instrumental record. The spatial pattern of this variability is hemispheric or perhaps even global in scale, but with particular emphasis on the Atlantic region. Independent analyses of multicentury integrations of two versions of the GFDL coupled atmosphere-ocean model also show the existence of distinct multidecadal variability in the North Atlantic region which resembles the observed pattern. The model variability involves fluctuations in the intensity of the thermohaline circulation in the North Atlantic. It is our intent here to provide a direct comparison of the observed variability to that simulated in a coupled ocean-atmosphere model, making use of both existing instrumental analyses and newly available proxy based multi-century surface temperature estimates. The analyses demonstrate a substantial agreement between the simulated and observed patterns of multidecadal variability in sea surface temperature (SST) over the North Atlantic. There is much less agreement between the model and observations for sea level pressure. Seasonal analyses of the variability demonstrate that for both the model and observations SST appears to be the primary carrier of the multidecadal signal.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003820000075
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