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  • 2000-2004  (6)
  • 1960-1964  (5)
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  • 1
    Electronic Resource
    Electronic Resource
    Additions and Corrections - Inherently Dissymetric Chromphores. Optical Activity Associated with a Homoconjugated Diene. (1962)
    s.l. : American Chemical Society
    Journal of the American Chemical Society 84 (1962), S. 5003-5003 
    Details
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ja00883a639
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  • 2
    Electronic Resource
    Electronic Resource
    Current density functional theory for optical spectra: A polarization functional (2001)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 115 (2001), S. 1995-1999 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: In this paper we present a new approach to calculate optical spectra, which for the first time uses a polarization dependent functional within current density functional theory (CDFT), which was proposed by Vignale and Kohn [Phys. Rev. Lett. 77, 2037 (1996)]. This polarization dependent functional includes exchange-correlation (xc) contributions in the effective macroscopic electric field. This functional is used to calculate the optical absorption spectrum of several common semiconductors. We achieved in all cases good agreement with experiment. © 2001 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1385370
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  • 3
    Electronic Resource
    Electronic Resource
    Specific Incorporation of Precursors into DNA by Feeding Labeled Bacteria to Paramecium aurelia (1964)
    Oxford, UK : Blackwell Publishing Ltd
    The @journal of eukaryotic microbiology 11 (1964), S. 0 
    Details
    ISSN: 1550-7408
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: SYNOPSIS. Studies were carried out on the introduction of labeled precursors into the DNA of Paramecium aurelia (syngen 4, stock 51) by way of the bacteria that are used for food. A thymine-requiring strain of Escherichia coli (15 T−) was labeled by growth in either H3-methyl thymidine or 2-C14 bromouracil, washed free of the exogenous label, and fed to the paramecia. The tritium label from the bacteria was incorporated almost exclusively into the DNA of the paramecia, whereas it was much less specifically incorporated when introduced directly from the medium. The Cu label from bromouracil was also incorporated mainly into the DNA of the paramecia although a small amount appeared in RNA. The formation of labeled food vacuoles was followed. Food vacuoles were formed at a nearly constant rate, with the total number of vacuoles increasing throughout the cycle. The lifetime of the vacuoles was about 2.5 hours. Incorporation of the label into the DXA of the paramecia begins within a few minutes of the formation of the first labeled vacuole. DNA synthesis begins about 1.5 hr after the previous fission (total cell cycle about 5.8 hr) and progresses at a nearly constant rate throughout the remainder of the cycle.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1550-7408.1964.tb01794.x
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  • 4
    Electronic Resource
    Electronic Resource
    SOLVENTS HAVING HIGH DIELECTRIC CONSTANTS. XIV. SOLUBILITIES AND REACTIONS OF SEVERAL TYPICAL INORGANIC AND ORGANIC COMPOUNDS IN N-METHYLACETAMIDE1 (1963)
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 67 (1963), S. 281-283 
    Details
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/j100796a015
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  • 5
    Electronic Resource
    Electronic Resource
    Epidemiology of acne in the general population: the risk of smoking (2001)
    Oxford, UK : Blackwell Science Ltd
    British journal of dermatology 145 (2001), S. 0 
    Details
    ISSN: 1365-2133
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Background Acne is a common skin disorder, but epidemiological data from the general population obtained by examination are scarce. Clinical experience suggests an association between smoking and acne, although confirmatory evidence from appropriate studies is lacking.Objectives To determine the prevalence and demographic factors of acne in a general population sample and to investigate the association of smoking and acne on a qualitative and quantitative level.Methods In a cross-sectional study, 896 citizens (aged 1–87 years, median 42) of the City of Hamburg were dermatologically examined. The prevalence and severity of acne were recorded and further information on demographic variables, medical history, and alcohol and cigarette consumption were obtained by a standardized interview.Results According to the clinical examination, acne was present in 26·8% overall, and was more prevalent in men (29·9%) than women (23·7%) (odds ratio, OR 1·37, 95% confidence interval, CI 1·01–1·87). Prevalence followed a significant linear trend over age with peak prevalence between 14 and 29 years (P 〈 0·001). The reported age at onset was significantly lower in women than men (P = 0·015). According to multiple logistic regression analyses acne prevalence was significantly higher in active smokers (40·8%, OR 2·04, 95% CI 1·40–2·99) as compared with non-smokers (25·2%). A significant linear relationship between acne prevalence and number of cigarettes smoked daily was obtained (trend test: P 〈 0·0001). In addition, a significant dose-dependent relationship between acne severity and daily cigarette consumption was shown by linear regression analysis (P = 0·001).Conclusions Smoking is a clinically important contributory factor to acne prevalence and severity.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1365-2133.2001.04290.x
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  • 6
    Electronic Resource
    Electronic Resource
    Early selection for extreme resistance to potato virus Y and tobacco etch virus in potato using a β-glucuronidase-tagged virus (2000)
    Oxford, UK : Blackwell Publishing Ltd
    Plant breeding 119 (2000), S. 0 
    Details
    ISSN: 1439-0523
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: The Rysto gene from Solanum stoloniferum introduced into potato cultivars (Solanum tuberosum L. ssp. tuberosum) confers resistance to potato virus A, potato virus V and potato virus Y (PVY). In addition to PVY, tobacco etch virus (TEV) and a TEV construct that encodes β-glucuronidase (TEV-GUS) were inoculated to determine the inheritance of resistance to these viruses in progenies obtained from potato cultivars containing the Rysto gene. While cultivars ‘Karlena’ and ‘Delikat’ were susceptible, ‘Bettina’ and clone 927eY were resistant to PVY, TEV and TEV-GUS, as determined by enzyme linked immunosorbent assay, biotest and GUS assay, respectively. The segregation ratios obtained from the progenies of ‘Bettina’בDelikat’ and 816eY בKarlena’ indicate that resistances to PVY and TEV are governed by one dominant gene or two genes tightly linked in coupling phase. Evidently, Rysto confers broad spectrum resistance to potyviruses. TEV resistance could be reliably detected 4 days after inoculation with the TEV-GUS construct by GUS assay. Therefore, the GUS-tagged TEV construct can be used for early selection for resistances based on the gene Rysto or closely linked genes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1439-0523.2000.00485.x
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  • 7
    Electronic Resource
    Electronic Resource
    Insulin: preliminary X-ray studies of citrate crystals (1961)
    Copenhagen : International Union of Crystallography (IUCr)
    Acta crystallographica 14 (1961), S. 82-82 
    Details
    ISSN: 0001-5520
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Geosciences
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0365110X61000310
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  • 8
    Electronic Resource
    Electronic Resource
    Host defense against Pseudomonas aeruginosa requires ceramide-rich membrane rafts (2003)
    [s.l.] : Nature Publishing Group
    Nature medicine 9 (2003), S. 322-330 
    Details
    ISSN: 1546-170X
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Medicine
    Notes: [Auszug] Pseudomonas aeruginosa infection is a serious complication in patients with cystic fibrosis and in immunocompromised individuals. Here we show that P. aeruginosa infection triggers activation of the acid sphingomyelinase and the release of ceramide in sphingolipid-rich rafts. Ceramide reorganizes ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/nm823
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  • 9
    Electronic Resource
    Electronic Resource
    Decomposition Pressure Hysteresis in the Zirconium-Hafnium-Hydrogen System (1964)
    [s.l.] : Nature Publishing Group
    Nature 203 (1964), S. 1163-1165 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Hysteresis in metal-hydrogen systems has been found by a number of workers as far back as the early 1900's, and the subject has been reviewed in recent publications3-7. Most explanations involved internal solid-state properties of the hydrided alloys. On a pressure-composition plot different paths ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/2031163b0
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  • 10
    Electronic Resource
    Electronic Resource
    Green's function for steady-state heat conduction in a bimaterial composite solid (2000)
    Springer
    Computational mechanics 25 (2000), S. 627-634 
    Details
    ISSN: 1432-0924
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract The derivation of a Green's function for steady-state heat conduction in anisotropic bimaterials is presented. The Green's function is obtained through a Fourier representation to obtain both free-space, singular parts and region-dependent, regular parts. To obtain the region-dependent parts of the Green's function, the homogeneous solution is written using the virtual force method. Full details of the necessary inversion integrals are provided. The Green's function is shown to degenerate to the usual logarithmic potential for steady-state heat conduction in isotropic solids. The normal derivatives necessary for implementation of the Green's function in boundary integral equations are provided, and an example calculation of the Green's function in a quartz-copper material system is presented.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s004660050509
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