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  • 1
    Electronic Resource
    Electronic Resource
    Soot formation in binary hydrocarbon mixtures (1988)
    s.l. : American Chemical Society
    Energy & fuels 2 (1988), S. 462-480 
    Details
    ISSN: 1520-5029
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ef00010a013
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  • 2
    Electronic Resource
    Electronic Resource
    Aluminum Determination, Aluminum Studies. Soil and Plant Analysis of Aluminum by Modification of the Aluminon Method (1959)
    s.l. : American Chemical Society
    Journal of agricultural and food chemistry 7 (1959), S. 115-117 
    Details
    ISSN: 1520-5118
    Source: ACS Legacy Archives
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/jf60096a005
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  • 3
    Electronic Resource
    Electronic Resource
    Infrared spectroscopy of the pentacoordinated carbonium ion C2H7+ (1989)
    s.l. : American Chemical Society
    Journal of the American Chemical Society 111 (1989), S. 5597-5604 
    Details
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ja00197a015
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  • 4
    Electronic Resource
    Electronic Resource
    A Comparative Study of Porous Titanium with Different Surface Modification Implanted in Dogs (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 342-343 (July 2007), p. 561-564 
    Details
    ISSN: 1013-9826
    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
    Notes: This study was carried out to investigate the effect of acid-alkali treatment and alkaliheattreatment on the push-out strength and tissue response of the porous titanium in vivo. Poroustitanium with different treatment was implanted in dog bony site for 2 months and 5 months and thepush-out strength was tested. At 2 months, the mean push-out strengths of the acid-alkali treatedand alkali-heat treated porous titanium were 11.3 and 15 MPa, respectively. At 5 months, the valuesreached 29.8 and 35 MPa, respectively. Histological observation showed a close contact betweenimplants and bone, and more bone tissue filled inside the pores of porous titanium increasing withimplantation time. The results indicated higher bonding strength between bone and porous titaniumin alkali-heat treated samples. Therefore, alkali-heat treatment can provide porous titanium implantswith better fixation as a bone substitute for clinical use under load-bearing conditions
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/54/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.342-343.561.pdf
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  • 5
    Electronic Resource
    Electronic Resource
    Lessening Hydroxyapatite Ceramics Particles Adverse Effects by Serum Modification: A Preliminary In Vitro Study and Mechanism Analysis (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 330-332 (Feb. 2007), p. 127-130 
    Details
    ISSN: 1013-9826
    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
    Notes: Serum immersion, a new method of pre-treated HA ceramics, has been compared withSBF immersion and untreated HA particles in cell culture condition. MTT assay indicates thatserum-immersion lessens particles cytotoxity of HA particles in cultured L929 mouse fibroblast cell(p〈0.05). Neither immersion nor traditional physical factors such as particle size, shape should beresponsible for these because SBF immersion with the similar factors results in no significantimprovement. The reason might be serum proteins adsorption and biommetic microstructureformation on the ceramics surface, which affect cellular membrane behaviors, phagosomemetabolization and cellular protein secretion. Otherwise, cells with particles degraded earlyapparently, which indicated that particles influence the cell cycle. The whole processes must becorrelated intensively with cytokine, protease and intracellular ion concentration, which would bediscussed in our follow-up studies
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/52/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.330-332.127.pdf
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  • 6
    Electronic Resource
    Electronic Resource
    The translational energy dependence of the F+C2H4 →H+C2H3F reaction cross section near threshold (1990)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 92 (1990), S. 275-284 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: We have carried out crossed molecular beam studies of the substitution reaction F+C2 H4 →H+C2 H3 F in the collision energy range 0.8–2.5 kcal/mol using a velocity selected F atom beam. The relative substitution cross section is found to decrease with increasing collision energy indicating that if there is a potential energy barrier to F atom addition to C2 H4 it is much less than 0.8 kcal/mol and that the transition state for addition occurs early along the reaction coordinate. These results agree well with ab initio calculations. Although the product translational energy distributions are similar to those obtained from earlier work at higher collision energies, the C2 H3 F angular distributions suggest that a wider range of reactant approach geometries lead to products at lower energies.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.458474
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  • 7
    Electronic Resource
    Electronic Resource
    Dynamics of endoergic substitution reactions. I. Br+chlorinated aromatic compounds (1988)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 89 (1988), S. 6226-6237 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The endoergic substitution reactions Br+R–Cl→Cl+R–Br (R=o-, m-, and p-CH3C6H4, C6H5, C6F5; ΔH°(approximately-equal-to)15 kcal/mol) have been studied using the crossed molecular beams method in the collision energy (Ec ) range 20–35 kcal/mol. The CH3C6H4Br and C6F5Br products were found to be mostly forward scattered with respect to the incident Br beam indicating that the lifetimes of the Br–R–Cl collision complexes are short compared to their rotational periods. The product translational energy distributions and excitation functions for these reactions are well reproduced by statistical calculations that assume that only a few vibrational modes in the collision complexes participate in intramolecular energy redistribution prior to Cl elimination. Ring substituents are found to affect both the extent of energy redistribution in the complexes and the probability of Br addition. For example, no substitution product was observed with m-CH3C6H4Cl or C6H5Cl. The relative magnitudes of the cross sections are explained in terms of possible features of the potential energy surfaces along their reaction coordinates.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.455439
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  • 8
    Electronic Resource
    Electronic Resource
    Dynamics of H2 elimination from 1,4-cyclohexadiene (1990)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 92 (1990), S. 3230-3231 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The dynamics of H2 elimination from 1,4-cyclohexadiene (CHDN), dissociated with 212 nm light, have been studied by state specific probing of the H2 product via (1+1) REMPI using a transform limited vacuum ultraviolet laser system. The quantum state distributions, the translational energy distribution and the Doppler profiles were measured giving a "rotational temperature'' of (approximately-equal-to)1600 K, a "vibrational temperature'' of (approximately-equal-to)4000 K, and a translational energy of (approximately-equal-to)30 kcal/mol for H2. Anisotropy in the Doppler profiles indicates that the H2's velocity vector is aligned parallel to its rotational angular momentum vector.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.457873
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  • 9
    Electronic Resource
    Electronic Resource
    Ultraviolet photodissociation and thermochemistry of CH2BrCH2I, CF2BrCF2I, and CF2ICF2I (1989)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 90 (1989), S. 6157-6170 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Using photofragment translational spectroscopy, we have monitored the dissociation of CH2BrCH2I at 248, 266, and 308 nm, and CF2BrCF2I and CF2ICF2I at 308 nm. The primary fragments are I(2P3/2) and I(2P1/2) and the corresponding haloethyl radicals. The I(2P3/2) contribution decreases upon fluorination, but it is dominant for CH2BrCH2I at 308 nm. The electronic absorption dipole lies roughly along the C–I bond axis in every case. Stable CF2CF2Br and CF2CF2I radicals can be readily generated through photodissociation of the parent compounds, while stable CH2CH2Br could not be unambiguously observed. Upper limits to the reaction enthalpy at 0 K for CF2ICF2Br(I)→C2F4+I+Br(I) are 75±1(59±1) kcal/mol. The TOF spectra and related data suggest that there is a barrier to decomposition for CF2CF2I→C2F4+I that exceeds the C–I bond energy in the radical.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.456332
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  • 10
    Electronic Resource
    Electronic Resource
    Infrared multiphoton dissociation of RDX in a molecular beam (1988)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 88 (1988), S. 801-810 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Infrared multiphoton dissociation (IRMPD) of hexahydro-1,3,5-trinitro-1,3,5-triazine (RDX) in a molecular beam has been performed in order to investigate the mechanism of RDX thermal decomposition. A beam of molecules was crossed by a pulsed TEA CO2 laser and velocity distributions of the various products were measured by the time-of-flight (TOF) technique as a function of the laboratory angle using a mass spectrometric detector. The dissociation channels, their branching ratios, and the translational energy distributions of the products were determined. In contrast to the conventional view of simple bond rupture through loss of NO2 as the dominant primary channel in RDX decomposition, it was found that the dominant primary channel is concerted symmetric triple fission to produce three CH2N2O2 fragments which subsequently undergo secondary concerted dissociation to produce HCN, H2CO, HONO (or HNO2), and N2O. A total of two primary and four secondary dissociation channels were observed. Concerted reactions predominate over simple bond rupture not only in the number of channels (four vs two) but also in the amount of products. A fair amount of translational energy release through concerted reaction channels was observed, which is significant for an explanation of the energies of RDX decomposition.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.454158
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