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  • 1
    Electronic Resource
    Electronic Resource
    Neutron profile refinement of the structure of FeOCl and FeOCl(TTF)1/8.5 (1986)
    s.l. : American Chemical Society
    Journal of the American Chemical Society 108 (1986), S. 7946-7951 
    Details
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ja00285a011
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  • 2
    Electronic Resource
    Electronic Resource
    Formation of interstitial palladium-carbon phase by interaction of ethylene, acetylene, and carbon monoxide with palladium (1985)
    s.l. : American Chemical Society
    Journal of the American Chemical Society 107 (1985), S. 4547-4548 
    Details
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ja00301a031
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  • 3
    Electronic Resource
    Electronic Resource
    Crystal structure of low cristobalite at 10, 293, and 473 K: Variation of framework geometry with temperature (1985)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 57 (1985), S. 1045-1049 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The crystal structure of low cristobalite (SiO2) was refined at 10, 293, and 473 K from time-of-flight neutron powder diffraction data. One of the Si-O distances and one Si-O-Si angle change considerably: 10 K, 1.602(1) and 1.617(1) A(ring), 144.7(1)°; 473 K, 1.605(2) and 1.590(2) A(ring), 148.4(1)°. The angular distortion of the SiO4 tetrahedron is greater at 473 K than at the lower temperatures. Root-mean-square displacements of Si and O are greater for cristobalite than for quartz and coesite at room temperature. The negative correlation between Si-O distance and Si-O-Si angle for cristobalite is similar to that for quartz held at a higher temperature (∼350 K). Any adjustment of the Si-O distance for riding motion between Si and O atoms would reduce the variation of Si-O distance with temperature and with Si-O-Si angle. Furthermore, adjustment of the Si-O-Si angle for rocking of the oxygen atom out of the Si-O-Si plane could improve the correlation between secant (Si-O-Si) and the isotropic chemical shift for 29Si nuclear magnetic resonance in silica polymorphs. The temperature variation of the crystal structure of low cristobalite cannot be modeled by simple tilting of rigid tetrahedra.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.334545
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  • 4
    Electronic Resource
    Electronic Resource
    Neutron diffraction and transmission electron microscopy study of hydrogen-induced phase transformations in Zr3Al (1990)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 67 (1990), S. 1312-1319 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Hydrogen-induced phase transformations of the equilibrium intermetallic compound Zr3 Al have been studied by in situ elastic neutron scattering, x-ray diffraction, and transmission electron microscopy (TEM). TEM observations reveal two distinct modes of amorphous phase formation in Zr3 Al upon hydrogenation, namely, heterogeneous nucleation at preexisting grain boundaries, and homogeneous nucleation within single-crystal grains. In situ neutron diffraction reveals a phase separation between a hydrogen (deuterium) poor and a hydrogen (deuterium) rich crystalline phase. Rietveld profile refinement of the neutron diffraction data indicates predominant hydrogen (deuterium) occupation of the octahedral interstitial sites in the crystalline matrix that have only Zr nearest-neighbor atoms. The two different modes of amorphous phase nucleation are directly related to the degree of hydrogen dissolution in the host crystalline matrix.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.345683
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  • 5
    Electronic Resource
    Electronic Resource
    Application of neutron diffraction to the characterization of residual thermal strains in YBa2Cu3O7−δ/Ag (1989)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 66 (1989), S. 3396-3398 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Additions of silver (Ag) have been reported to improve the mechanical properties of high-temperature superconductor by YBa2Cu3O7−δ (abbreviated YBCO). However, during fabrication of YBCO/Ag composites, differential thermal expansion upon cooling can lead to potentially troublesome residual stresses. The Intense Pulsed Neutron Source and General Purpose Powder Diffractometer at Argonne National Laboratory were used to show that neutron diffraction techniques can be applied to YBCO/Ag composites to measure bulk residual strains in the constituent parts, and to determine the effect of Ag on stoichiometry (and thus on the critical current density). We have observed residual tensile strains in Ag as a function of crystallographic direction; three strains range from as high as 0.085% in 15% Ag samples to as low as about 0.02% in a 30% Ag sample. Compressive strains in the YBCO (111) crystallographic direction were approximated by correcting for the diffraction peak shift due to changes in stoichiometry with varying Ag content. The estimated compressive-strain values vary from 0.04% (15% Ag) to 0.09% (20% Ag) to 0.01% (30% Ag), with an uncertainty of about 0.03%. The presence of significant average tensile strain in the Ag, particularly for 15% and 20% Ag samples, indicates good interface bonding between YBCO and Ag.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.344088
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  • 6
    Electronic Resource
    Electronic Resource
    The effect of patient-associated factors on the reproducibility of the mouth bleeding score (1988)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of periodontal research 23 (1988), S. 0 
    Details
    ISSN: 1600-0765
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Patient effects on the reproducibility of dichotomous measures of bleeding tendency after probing were investigated. Large variations in this reproducibility were observed between patients. Therefore the accuracy of the mouth bleeding score, a gingival index system, also depended on the type of patient. To illustrate the effects on the prediction intervals of the mouth bleeding score, the patients were divided into two groups using cluster analysis. The prediction intervals of the mouth bleeding scores determined for each group differed considerably from one another. Categorizing patients by the average probing depth and the average chance of bleeding, measured over all sites within a patient, provided a statistical evaluation of differences between successive mouth bleeding scores while considering the effect of the patient.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1600-0765.1988.tb01424.x
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  • 7
    Electronic Resource
    Electronic Resource
    Comparison of gene flow estimates between species of darters in different streams (2000)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of fish biology 57 (2000), S. 0 
    Details
    ISSN: 1095-8649
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Allozyme variation was assessed at two localities for 38 loci in Etheostoma blennioides and 43 loci in E. flabellare. Percent polymorphism (P) ranged from 18·4 to 31·6 and average heterozygosity (H) ranged from 0·026 to 0·079. Estimates of gene flow indicated panmictic populations of E. blennioides and sub-divided populations of E. flabellare, with significantly more substructuring of E. flabellare from one population. Population structuring of E. flabellare and no structuring of E. blennioides is consistent with predictions based on life history data. Significantly different gene flow estimates for E. flabellare between streams imply that each stream environment induced different population structures. Reduced heterozygosity for both species and significantly less population structuring in one population are consistent with drought-induced extinction and recolonization that probably occurs in the smaller stream.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1095-8649.2000.tb02225.x
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  • 8
    Electronic Resource
    Electronic Resource
    Reproducibility of bleeding tendency measurements and the reproducibility of mouth bleeding scores for the individual patient (1986)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of periodontal research 21 (1986), S. 0 
    Details
    ISSN: 1600-0765
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: The aim of this study was to determine the accuray of bleeding tendency measurements in order to assess the probability values of differences in number of bleeding sites at successive examinations in the individual patient. Duplicate bleeding tendency measurements were performed in patients who had received initial treatment. Measurements in deep and shallow pockets showed different reproducibility values. The proportion of agreement on lack of bleeding was relatively high (86%) in shallow-pockets (≤4 mm) and decreased significantly in deep pockets (〉 4 mm). The proportion of agreement on bleeding was relatively low (36%) in shallow pockets and increased significantly in deep pockets. Chance distributions were calculated on basis of the reproducibility values of bleeding and non-bleeding on probing. It was found that only large differences in the number of bleeding sites between two examinations can indicate a possible change in the periodontal condition of the individual patient. The sensitivity of the individual mouth bleeding score can be increased by recording as many sites as possible.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1600-0765.1986.tb01502.x
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  • 9
    Electronic Resource
    Electronic Resource
    Symptoms of the stomatognathic system in temporomandibular and cervical spine disorders (1996)
    Oxford BSL : Blackwell Science Ltd
    Journal of oral rehabilitation 23 (1996), S. 0 
    Details
    ISSN: 1365-2842
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: This study was performed to assess the prevalance of signs and symptoms of temporomandibular disorders (TMD) in patients with cervical spine disorders (CSD) and to compare patients with CSD and subgroups of patients with TMD with regard to the results of orthopaedic tests of the stomatognathic system. A group of 103 consecutive patients with signs and symptoms of CSD and a group of 111 consecutive patients with TMD were examined. All subgroups of TMD patients showed a significantly smaller range of motion than the CSD patients. Patients with TMD had limited mouth opening (〈40 mm) on active and passive mouth opening more often than CSD patients. TMD patients with myogenous problems reported oral habits more often than CSD patients, although no objective differences between CSD and TMD patients were found. Subgroups of TMD patients reported joint sounds, and pain on palpation and joint play tests of the temporomandibular joint (TMJ) more frequently than CSD patients. Joint sounds on active movements, pain on palpation of the TMJ, and pain on joint play tests correctly classified 82% of the patients with TMD and 72% of the patients with CSD. In spite of the biomechanical and anatomical relationship between the neck and the stomatognathic system, the results of the study show that CSD patients have signs and symptoms of TMD comparable with those of the adult Dutch population. It was concluded that the function of the masticatory system should be evaluated in patients with neck complaints in order to rule out a possible involvement of the masticatory system.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1365-2842.1996.00427.x
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  • 10
    Electronic Resource
    Electronic Resource
    Design study of a time-of-flight small-angle diffractometer for a pulsed neutron source (1978)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 11 (1978), S. 464-465 
    Details
    ISSN: 1600-5767
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Geosciences , Physics
    Notes: A design study was made of a neutron small-angle scattering (SAS) instrument for use at Argonne National Laboratory's proposed Intense Pulsed Neutron Source, IPNS-II (Carpenter & Werner, 1976; Werner, 1977; Carpenter, 1977). The instrument design incorporates several features: a converging-slit collimator, wavelength band-limiting choppers, capacity for large samples, and a two-dimensional detector. Machine design-dependent parameters are considered in a Monte-Carlo code that produces estimates of the instrumental resolution function and available flux at the sample. It was found that the calculated flux on sample exceeds that at steady-state reactor instruments of comparable resolution.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S002188987801359X
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