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  • 1
    Electronic Resource
    Electronic Resource
    Peptide Aldehyde Inhibitors of Hepatitis A Virus 3C Proteinase (1995)
    s.l. : American Chemical Society
    Biochemistry 34 (1995), S. 8172-8179 
    Details
    ISSN: 1520-4995
    Source: ACS Legacy Archives
    Topics: Biology , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/bi00025a024
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  • 2
    Electronic Resource
    Electronic Resource
    XRD and Optical Characterisation of GaN and Associated Substrate Materials (2000)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 321-324 (Jan. 2000), p. 1056-1061 
    Details
    ISSN: 1662-9752
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/04/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.321-324.1056.pdf
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  • 3
    Electronic Resource
    Electronic Resource
    Agricultural drainage practices in Ireland (1986)
    Springer
    Environmental geology 9 (1986), S. 31-40 
    Details
    ISSN: 1432-0495
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract Agricultural drainage practices are reviewed under two main headings: arterial drainage of river catch-ments by developing main channels, and field drainage of smaller parcels of land using pipes and open trenches. The use of cost/benefit analysis on the arterial drainage program is considered and the inherent errors are discussed. Conservation of the environment is described as it applies to land-scaping, fisheries, and wildlife, and the drainage authorities are shown to have an enlightened attitude to proper preservation of the world around us.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02439884
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  • 4
    Electronic Resource
    Electronic Resource
    Resource allocation in Mytilus edulis on the shore and in suspended culture (1984)
    Springer
    Marine biology 84 (1984), S. 27-34 
    Details
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The annual cycle of carbon and nitrogen content of the flesh of wild and cultivated mussels (Mytilus edulis L.) in Killary Harbour, Ireland, was measured over two years, starting in February, 1980 and ending in November, 1981. The carbon and nitrogen contents of mussel gametes were determined and the allometry of growth of wild and cultured mussel shells was examined with respect to length, weight and organic content. The carbon and nitrogen contents of the organic fraction of the shell were determined. These data were combined with those we had previously published on growth rate, gametogenesis and the annual cycle of ash-free dry weight (AFDW) of mussels in the same locality. Estimates were made of fecundity, reproductive effort and the partitioning of carbon and nitrogen between soma, gametes and shell. In suspended culture, cumulative production after eighteen months is equal to cumulative production after six to seven years on the shore. For comparison, partitioning of carbon and nitrogen resources between soma, shell and gonad is estimated when total cumulative production by wild and cultivated mussels is approximately equal. Differences in resource allocation are considerable. Wild mussels allocate some 57% of their carbon budget and 52% of their nitrogen budget to gamete output. In culture, mussels allocate only 22% of their carbon budget and 19% of their nitrogen budget to gamete output. It is concluded that in response to a higher production rate, cultivated mussels increase allocation of resources to somatic growth.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00394523
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  • 5
    Electronic Resource
    Electronic Resource
    State-resolved translation energy distributions for NCO photodissociation (2001)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 114 (2001), S. 9020-9027 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The photodissociation dynamics of NCO have been examined using fast beam photofragment translational spectroscopy. Excitation of the 102, 301, and 102302 transitions of the B˜ 2Π←X˜ 2Π band produces N(4S)+CO photofragments exclusively, while excitation of the 103303 transition yields primarily N(2D)+CO photoproducts. The translational energy [P(ET)] distributions yield D0(N–CO)=2.34±0.03 eV, and ΔHf,00(NCO)=1.36±0.03 eV. The P(ET) distributions exhibit vibrationally resolved structure reflecting the vibrational and rotational distributions of the CO product. The N(2D)+CO distribution can be fit by phase space theory (PST), while the higher degree of CO rotational excitation for N(4S)+CO products implies that NCO passes through a bent geometry upon dissociation. The P(ET) distributions suggest that when the B˜ 2Π←X˜ 2Π band is excited, NCO undergoes internal conversion to its ground electronic state prior to dissociation. Excitation of NCO at 193 nm clearly leads to the production of N(2D)+CO fragments. While conclusive evidence for the higher energy O(3P)+CN(X 2Σ+) channel was not observed, the presence of this dissociation pathway could not be excluded. © 2001 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1369132
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  • 6
    Electronic Resource
    Electronic Resource
    Photodissociation dynamics of the triiodide anion (I3−) (2000)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 113 (2000), S. 2255-2262 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The spectroscopy and dissociation dynamics of I3− were investigated using fast beam photofragment translational spectroscopy. The photofragment yield of I3− from 420 to 240 nm was measured, yielding two broadbands at the same energies as in the absorption spectrum of I3− in solution. Photodissociation dynamics measurements performed with two-particle time-and-position sensitive detection revealed two product mass channels having photofragment mass ratios of 1:2 and 1:1. Both channels were seen at all photolysis wavelengths. Translational energy distributions show that the 1:2 products are from a combination of I(2P3/2)+I2− and I*(2P1/2)+I2−. The 1:1 mass channel is from symmetric three-body dissociation to I−+2I. © 2000 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.482040
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  • 7
    Electronic Resource
    Electronic Resource
    Photodissociation and photoisomerization pathways of the HNCN free radical (2001)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 114 (2001), S. 9000-9011 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The photodissociation spectroscopy and dynamics of the HNCN free radical have been investigated by fast beam photofragment translational spectroscopy. Predissociative transitions for both the B˜ 2A′←X˜ 2A″ band and a higher-energy band system assigned to the C˜ 2A″←X˜ 2A″ band were observed. Photofragment mass distributions indicate that N2 loss is the primary dissociation pathway. Translational energy distributions reveal a resolved vibrational structure of the N2 fragment, suggesting that the HNCN radical first isomerizes to a cyclic HCN2 intermediate. A dissociation mechanism is proposed in which electronically excited HNCN undergoes internal conversion to the ground state, followed by isomerization to cyclic HCN2 and dissociation through a tight three-center transition state. The HNCN bond dissociation energy D0 and heat of formation ΔfH0(HNCN) were determined to be 2.80±0.03 eV and 3.35±0.03 eV, respectively. © 2001 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1367411
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  • 8
    Electronic Resource
    Electronic Resource
    Photodissociation dynamics of the CNN free radical (2000)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 113 (2000), S. 4179-4189 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The spectroscopy and photodissociation dynamics of the A˜ 3Π and B˜ 3Σ− states of the CNN radical have been investigated by fast beam photofragment translational spectroscopy. Vibronic transitions located more than 1000 cm−1 above the A˜ 3Π←X˜ 3Σ− origin were found to predissociate. Photofragment yield spectra for the B˜ 3Σ−←X˜ 3Σ− band between 40 800 and 45 460 cm−1 display resolved vibrational progressions with peak spacing of (approximate)1000 cm−1 corresponding to symmetric stretch 10n and combination band 10n301 progressions. Ground state products C(3P)+N2 were found to be the major photodissociation channel for both the A˜ 3Π and B˜ 3Σ− states. The translational energy distributions for the A˜ 3Π state are bimodal with high and low translational energy components. The distributions for the B˜ 3Σ− state reveal partially resolved vibrational structure for the N2 photofragment and indicate extensive vibrational and rotational excitation of this fragment. These results suggest that bent geometries are involved in the dissociation mechanism and provide more accurate values: ΔfH0(CNN)=6.16±0.05 eV and ΔfH298(CNN)=6.15±0.05 eV. These values, coupled with recent D0(RH) and D298(RH) values from Clifford et al. [J. Phys. Chem. 102, 7100 (1998)], yield ΔfH0(HCNN)=5.02±0.18 eV, ΔfH298(HCNN)=4.98±0.18 eV, ΔfH0(H2CNN)=3.09±0.21 eV, and ΔfH0(H2CNN)=3.09±0.21 eV. © 2000 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1288267
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  • 9
    Electronic Resource
    Electronic Resource
    Homogeneity of graphite-monochromated X-ray beams (1988)
    [S.l.] : International Union of Crystallography (IUCr)
    Acta crystallographica 44 (1988), S. 623-627 
    Details
    ISSN: 1600-5724
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: The factors influencing the homogeneity of the incident X-ray beam when a graphite monochromator is applied are discussed, in particular the influence of the size and shape of the focal spot of the X-ray tube and the diffraction angle of the monochromator. Beam profiles have been measured for several commonly used X-ray tubes - with a fine or normal focus - and compared. It is shown that in certain cases the normal-focus X-ray tubes give a much broader high- intensity region of the incident beam than the fine- focus X-ray tubes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0108767388002417
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  • 10
    Electronic Resource
    Electronic Resource
    Distribution of Cholesterol in Fractionated Beef Tallow (1984)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 49 (1984), S. 0 
    Details
    ISSN: 1750-3841
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology
    Notes: The cholesterol contents of tallow and tallow fractions derived by aqueous detergent fractionation were determined by gas chromatography. Tallow was found to contain 0.14% cholesterol by weight. Liquid and solid fractions subsequently derived by temperature fractionation at 40, 33, 27, 22 and 18°C contained between 0.10 and 0.15% cholesterol by weight. The liquid fraction at each temperature had cholesterol contents 0.02 – 0.04% higher than the corresponding solid fractions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2621.1984.tb14997.x
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