Showing papers by "Pacific Northwest National Laboratory published in 1979"
TL;DR: In this paper, a generalized non-Gaussian diffusion model for turbulent shear flow is developed on the basis of statistical theory and K-theory, which is a special case of the conventional Guassian diffusion model.
138 citations
TL;DR: In this paper, the formation of submicron particles from pulverized coal combustion in coal-fired steam plants has been analyzed using XRF, AA, and INAA techniques.
96 citations
TL;DR: In this paper, the authors investigated the relationship between the transport of dissolved organic carbon (DOC) in four river systems in different physiographic regions of the United States was related to link magnitude by a power function, log Y = −0.84 + 1.24 log X.
78 citations
TL;DR: In this article, a high-temperature Knudsen cell equipped with a gas inlet and modulated molecular-beam mass-spectrometric detection has been constructed to study the high temperature pyrolysis of model fuel compounds.
62 citations
TL;DR: Amorphous intertransition metal alloys may be a special class of the glassy state whose short-range structure is random tetrahedral close packing of soft atoms similar to those in the crystalline counterparts.
Abstract: Amorphous intertransition metal alloys may be a special class of the glassy state whose short-range structure is random tetrahedral close packing of soft atoms similar to those in the crystalline counterparts. A short-range structure is described based on random stacking of Kasper poly hedra and atomic disorder at the stacking misfit, and has tetrahedral sites, high atomic coordination numbers and asymmetric shapes of atoms.
57 citations
TL;DR: In this paper, a study of reactive sputtered oxide optical coatings is presented for use in the NOVA Terawatt neodymium glass laser under development at Lawrence Livermore Laboratory, Livermore, California.
48 citations
TL;DR: Amorphous and crystaline Mo-Ni formed by sputter deposition was bombarded with high energy nickel ion to test for response to irradiation as mentioned in this paper, and no effects were shown in amorphous MoNi at low temperature (570/sup 0/K).
42 citations
TL;DR: In this paper, the authors presented an ab initio calculation for three possible conformations of the n-propyl radical and found the completely optimized geometry and total energy for each conformation by using the gradient method.
Abstract: Ab initio calculations are presented for three possible conformations of the n‐propyl radical. The completely optimized geometry and total energy for each conformation is found by using the gradient method. The theoretical results show that the conformations are energetically very close to each other. This agrees with experimental studies on the n‐propyl radical in rare gas matrices but disagrees with experiments performed in solutions.
35 citations
TL;DR: In this paper, a steam gasification of wood in the presence of catalysis was investigated and two methods for wood/catalyst contacting were used: dry mixing of wood and solid catalyst and impregnation of the wood with catalyst.
34 citations
TL;DR: In this article, property composition relationships in a-Si:H have been determined for films made over a wide range of sputter deposition conditions, including rf-induced dc bias to the substrate.
27 citations
TL;DR: In this paper, the predicted creep response at 200°C of both cyclic and steady-state deuteron irradiated nickel is analyzed and compared with experiment, and it is shown that the radiation induced creep mechanism is enhanced climb-glide creep and not stress induced preferential absorption (SIPA).
TL;DR: Rats exposed to an aerosol of cadmium oxide for up to 1 year postexposure exhibited a statistically significant increase in blood pressure, blood glucose levels, urinary protein, and in the incidence of seminiferous tubule degeneration, suggesting that chronic toxicity of inhaled cadMium oxide may be manifest in organ systems other than the lung.
TL;DR: Low-molecular-weight products from the degradation of pure cellulose in 0.3-0.65 M sodium carbonate or hydrogen carbonate at 300° have been identified by g.l.c-m.s. as mentioned in this paper.
TL;DR: In this article, combined mode d.c.-r.f. sputtering was used to make deposits consiting of alternate layers of Ni/ZrO2 + Y or Ni-50 Cr/ZRO2+Y with layer thicknesses ranging from 0.0048 to 0.25 cm.
TL;DR: In this article, the mobility of interstitial helium in Nb and Nb-O alloys was studied in the temperature range of 10−383 K using resistivity measurements, and the results suggest that helium is mobile at temperatures above 295 K and that the precipitation of large helium bubbles occurs along grain boundaries.
TL;DR: In this paper, the systematics of differential ionization cross sections for incident charged particles which possess atomic structure are explored for the intermediate and high energy projectiles where the applicability of high energy approximations can be tested and the dramatic changes in emission spectra observed as the projectile energies decrease.
Abstract: The systematics of differential ionization cross sections are explored for incident charged particles which possess atomic structure. Although little has been published regarding outer shell ionization by structured projectiles, sufficient data are becoming available to provide some insight into the collision process. This discussion concentrates on systematics of emission cross sections for the intermediate and high energy projectiles where the applicability of high energy approximations can be tested and the dramatic changes in emission spectra observed as the projectile energies decrease. Since heavy ion interactions are important in many research fields, it is particularly useful to determine where simple methods of cross section scaling may be appropriate.
TL;DR: In this paper, an experimental technique developed to measure the irradiation creep of metallic specimens subjected to light ion bombardment is described, where the experimental apparatus has the capability to remotely set and control ion flux, stress and temperature.
TL;DR: In this paper, X-ray photoelectron spectroscopy has been used to identify and determine the concentrations and oxidation states for a number of major and minor elements present on the surface of micron-size fly-ash particles.
TL;DR: A morphological defect to one eye was observed in 17 of 20 young shiner perch exposed to chlorinated sea water, and it was absent in the 5 controls, apparently related to the concentration of total residual oxidants.
Abstract: 1)
A morphological defect to one eye was observed in 17 of 20 young shiner perch exposed to chlorinated sea water, and it was absent in the 5 controls. The occurrence of the defect was apparently related to the concentration of total residual oxidants.
2)
Behavioral aberrations appeared to be associated with the morphological defect in exposed fish. Fish with severe cases were observed to be unsuccessful at feeding and at avoiding capture by dip-net.
3)
Fish which died during the experiment varied in the degree of severity of the observable morphological aspects of the defect.
TL;DR: In this article, the radiation damage induced in nickel, niobium and 316SS by T (d,n) and Be (d-n) neutrons was evaluated by microstructural analysis and mechanical property measurements.
TL;DR: In this article, a dual beam accelerator facility was used to simulate the helium generation and displacement damage expected in a fusion reactor first wall and the results suggest continuous void nucleation due to the helium.
25 Dec 1979
TL;DR: In this paper, the use of the Nomarski differential interference contrast (DIC) microscopy has been extended to provide nondestructive, quantitative analysis of a sample's surface topography.
Abstract: The use of Nomarski differential interference contrast (DIC) microscopy has been extended to provide nondestructive, quantitative analysis of a sample's surface topography. Theoretical modeling has determined the dependence of the image intensity on the microscope's optical components, the sample's optical properties, and the sample's surface orientation relative to the microscope. Results include expressions to allow the inversion of image intensity data to determine sample surface slopes. A commercial Nomarski system has been modified and characterized to allow the evaluation of the optical model. Data have been recorded with smooth, planar samples that verify the theoretical predictions.
TL;DR: A column chromatographic method using a polyamide support has been developed which allows rapid isolation of catechol-type siderophores directly from culture supernatants and is superior to presently used methods with regard to speed, convenience, and lack of degradation products.
TL;DR: In this paper, single-crystal rods of high-purity Mo were prepared by zone refining and irradiated at 40/sup 0/C in the Hanford reactor.
TL;DR: The electropolishing technique can be used to increase the critical flow of a capillary tube in a controllable way.
Abstract: A technique has been developed for electropolishing the bore of metal capillary tubes. Although developed specifically for stainless‐steel tubes, the technique should be directly applicable to other metals. Tubes with inside diameter as small as 0.20 mm and 110 mm long have been successfully electropolished. The electropolishing technique can be used to increase the critical flow of a capillary tube in a controllable way.