Materials Literature
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THE EFFECT OF NEGATIVE ADSORPTION ON THE FILTRATE COMPOSITION OF CLAY SUSPENSIONS AND PASTES WAS STUDIED. A DRYING-OUT HOMOIONIC MONTMORILLONITIC SUSPENSION WAS STUDIED THEORETICALLY AND EXPERIMENTALLY. THE RELATIONSHIPS BETWEEN THE WATER CONTENT OF THE SUSPENSION AND THE COMPOSITION OF THE FILTRATE WERE STUDIED BY US…
The absorption due to F centers in x-irradiated KBr and NaBr has been measured over a wide range of temperatures from 4 to 370°K. In NaBr (which is exceedingly difficult to color) there is also formed a well-isolated M band without the usual difficulty of overlapping R bands and so the temperature dependence of the sh…
In order to determine the conditions under which core spray cooling can be effective after loss of coolant accident, spray cooling experiments have been conducted on a heater assembly at low heat fluxes corresponding to the decay heat following a reactor shut-down. A series of tests have been made at atmospheric press…
A study of the mode of inhibition of RNase by bentonite showed that the inactivation of the enzyme could not be attributed solely to an ion-exchange effect as previously postulated. Vermiculite, which is a clay with higher cation capacity than bentonite, showed very little inactivation of RNase. The spatial arrangemen…
This study was designed to determine if the skinfold measurements on an exercised arm would decrease as a result of regular weight training with that arm. Thirty-two subjects completed three sets of 7-RM curls and three sets of 7-RM triceps extensions on either a daily or an alternate day schedule for a period of 6 we…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEnthalpy of formation of neptunium dioxideElmer J. Huber and Charles E. HolleyCite this: J. Chem. Eng. Data 1968, 13, 4, 545–546Publication Date (Print):October 1, 1968Publication History Published online1 May 2002Published inissue 1 October 1968https://pubs.acs.org/doi/10.1…
Cottrell atmospheres modulate the solute concentration of alloys and lead to fluctuations in phonon velocity essentially proportional to the dislocation strain field. Normally one regards point defects as ineffective in scattering phonons at the very low temperatures when the thermal resistance due to dislocations is…
Rates of K absorption by young barley plants grown for 20 days in flowing nutrient solutions have been studied at 3 solution K concentrations (20, 200, and 2000 mum) and at 2 Ca concentrations (250 and 2500 mum). Increasing solution K increased plant K content, concentration, and rate of absorption: solution Ca concen…
Measurements of the specific heats of NaF and CsBr between 20 and 300 °K are reported. The results are believed to be accurate to within 0.5% down to 60 °K, falling to 2% at 25 °K. The Grüneisen parameters γ = β V/C V χ T = β V/C P χ S of NaF and CsBr have been calculated from the present heat capacity measurements in…
Magnetocrystalline anisotropy in gadolinium has been studied utilizing a spin-wave model in which a crystal field of hexagonal close-packed symmetry and magnetic dipole-dipole interactions are treated as a first-order perturbation to isotropic exchange. Corrections to the temperature dependence of K 1 , due to normal…
The denaturation of enzymes in solution by cavitating ultrasound has been reported previously. This report presents the results of an extensive study of the effects of noncavitating ultrasound on solutions of α-chymotrypsin, trypsin, aldolase, lactate dehydrogenase, and ribonuclease. In one set of experiments, the sol…
Data on the electrical, optical, magnetic, and structural properties of ${\mathrm{Ti}}_{2}$${\mathrm{O}}_{3}$ are reviewed; the differences between the transition encountered in ${\mathrm{Ti}}_{2}$${\mathrm{O}}_{3}$ and ${\mathrm{V}}_{2}$${\mathrm{O}}_{3}$ are particularly stressed. Perusal of the available experiment…
Liquidus phase equilibrium data are presented for the system Al 2 O 3 ‐Cr 2 O 3 ‐SiO 2 . The liquidus diagram is dominated by a large, high‐temperature, two‐liquid region overlying the primary phase field of corundum solid solution. Other important features are a narrow field for mullite solid solution, a very small c…
The irradiation damage configuration and yield stress response obtained in the c.p.h. α’and α phases in a Zr-2·7% Nb alloy after fast neutron irradiation have been studied as a function of pre-irradiation solute distribution. Largest yield stress increments were obtained for specimens irradiated with the solute initia…
Single crystals of yttrium phosphate doped with Eu3+ were investigated by means of polarized emission and absorption spectroscopy. The spectra are consistent with the known D2d site symmetry of the Eu3+ ion, and most of the observed transitions have been assigned. The energy-level structure of the 7F multiplet and the…
Increasing concentrations of K (20, 200, 2000 mum) in the nutrient solution depressed Ca content and concentration in barley plants growing in nutrient solutions of low Ca concentrations (250 and 2500 mum). Increasing K from 20 to 200 mum depressed Ca absorption more than increasing K from 200 to 2000 mum K.The strong…
The optical absorption associated with charge carriers in NiO and CoO has been obtained from transmission measurements on pure and Li-doped crystals in the wavelength region 0·5 to 700 μm, at temperatures between 100 and 500°K. The absorption increases smoothly with frequency to a maximum near 1 ev and then shows a fu…
Machine learning (ML) is transforming all areas of science. The complex and time-consuming calculations in molecular simulations are particularly suitable for an ML revolution and have already been profoundly affected by the application of existing ML ...Read More
Abstract The surface properties of a range of aluminas, obtained by calcination of crystalline and gelatinous aluminium hydroxides at temperatures from 300° to 1000° and characterised by X ‐ray powder diffractometry, have been examined by nitrogen adsorption. On calcination the hydroxides exhibited two distinct types…
The ferromagnetic Curie temperature of EuO films has been increased by selective doping with trivalent rare-earth oxides. The electrical resistivity, which depends upon the temperature and has a broad peak at ≈100°K, decreases markedly to ≈10−1 Ω·cm with doping. A typical ferromagnetic Curie temperature, determined fr…