Search Results - (Author, Cooperation:D. W. Griffith)

Showing 1 - 5 results of 5, query time: 0.24s Refine Results
  1. 1
    Staff View
    Publication Date:
    2014-11-07
    Publisher:
    Nature Publishing Group (NPG)
    Print ISSN:
    0028-0836
    Electronic ISSN:
    1476-4687
    Topics:
    Biology
    Chemistry and Pharmacology
    Medicine
    Natural Sciences in General
    Physics
    Published by:
    http://www.nature.com/

    Latest Papers from Table of Contents or Articles in Press
  2. 2
    Griffith, D. W. ; Stern, Seymour

    London : Periodicals Archive Online (PAO)
    Published 1947
    Staff View
    ISSN:
    0037-4806
    Topics:
    Media Resources and Communication Sciences, Journalism
    URL:
    http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&res_dat=xri:pao:&rft_dat=xri:pao:article:p209-1947-016-61-000016

    Articles: DFG German National Licenses
  3. 3
    Wilson, S. R. ; Crutzen, P. J. ; Schuster, G. ; Griffith, D. W. T. ; Helas, G.

    [s.l.] : Nature Publishing Group
    Published 1988
    Staff View
    ISSN:
    1476-4687
    Source:
    Nature Archives 1869 - 2009
    Topics:
    Biology
    Chemistry and Pharmacology
    Medicine
    Natural Sciences in General
    Physics
    Notes:
    [Auszug] Phosgene (COCI2) has been detected at the Earth's surface, in marine, continental and urban air masses in California1,2. Concentrations vary considerably, but show an average mixing ratio of ~25 p.p.t.v. (where p.p.t.v. is 1 in 1012 molecules). Its presence at ground level has been explained in ...
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1038/334689a0

    Articles: DFG German National Licenses
  4. 4
    Staff View
    ISSN:
    1573-1472
    Keywords:
    Mass balance ; Flux-gradient ; Boundary-layer budgeting ; Enteric fermentation
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Geosciences
    Physics
    Notes:
    Abstract The paper examines the strengths and weaknesses of a rangeof meteorological flux measurement techniques that mightbe used to verify predictions of greenhouse gas inventories.Recent research into emissions of methane (CH4)produced by enteric fermentation in grazing cattle and sheepis used to illustrate various methodologies. Quantifying thisimportant source presents special difficulties because the animalsconstitute moving, heterogeneously distributed, intermittent, pointsources. There are two general approaches: one, from the bottom up,involves direct measurements of emissions from a known number ofanimals, and the other, from the top down, infers areal emissions ofCH4 from its atmospheric signature. A mass-balance methodproved successful for bottom-up verification. It permits undisturbedgrazing, has a simple theoretical basis and is appropriate for fluxmeasurements on small plots and where there are scattered pointsources. The top-down methodologies include conventional flux-gradientapproaches and convective and nocturnal boundary-layer (CBL and NBL)budgeting schemes. Particular attention is given to CBL budget methods inboth differential and integral form. All top-down methodologies require ideal weather conditions for their application, and they suffer from the scattered nature of the source, varying wind directions and low instrument resolution. As for mass-balance, flux-gradient micrometeorological measurements were in good agreement with inventory predictions of CH4 production by livestock, but the standard errors associated with both methods were too large to permit detection of changes of a few per cent in emission rate, which might be important for inventory, regulatory or research purposes. Fluxes calculated by CBL and NBL methods were of the same order of magnitude as inventory predictions, but more improvement is needed before their use can be endorsed. Opportunities for improving the precision of both bottom-up and top-down methodologies are discussed.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1023/A:1002604505377

    Articles: DFG German National Licenses
  5. 5
    Staff View
    ISSN:
    1871-4528
    Keywords:
    low temperature sweetening ; reducing sugar
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes:
    Summary Several clones from a potato breeding programme at the Scottish Crop Research Institute (SCRI) produced acceptable (pale) coloured fry products after five months' storage at 4°C. Chemical analysis of tuber samples taken at five-week intervals during storage at 4°C and 10°C gave a substantial variation in glucose, fructose and sucrose concentrations among the 22 clones examined. Several unnamed SCRI clones showed little accumulation of reducing sugars when stored at 4°C. In marked contrast, the cultivars Record and Pentland Dell, currently the most widely used cultivars for fry processing in the UK, accumulated far greater levels of sugar during low temperature storage. Glucose concentration proved more important than fructose concentration in determining fry colour. Clones with the lowest concentrations of glucose after storage at 4°C also showed lowest concentrations when stored at 10°C. These results are in agreement with previous reports on the predictive value of glucose levels at harvest, but this is the first identification of such low temperature, low sweetening variants in agronomically adapted clones of the cultivated tetraploid potato.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1007/BF02358449

    Articles: DFG German National Licenses