Experimental comparison of the tuberculostatic activities of INH, INHG and INHG-Na (author''s transl)

A sample of 42 case notes of alcoholic patients were abstracted for 17 items by three different raters. Interrater agreement was generally rather low. Research based on case-note abstraction which does not report on abstraction reliabilities must therefore be viewed with some suspicion. It would be helpful if clinical material could more often be collected in a standardized manner.     

Probability Distributions for Noise Plus Several Sine Waves--The Problem of Computation

The problem of computing the distributions of the envelope and instantaneous value of the sum of several sine waves plus Gaussian noise is reviewed. It is pointed out that the associated integrals can be efficiently evaluated by the trapezoidal rule except when the noise is small. Approximations which hold when the noise is small are given.     

Long-term responses of rats to heat-treated dietary fats: IV. Weight gains,food and energy efficiencies,longevity and histopathology

Representative cottonseed salad oils, corn oils, lards and hydrogenated vegetable shortenings, and portions of the same fats heated at 182 C for 120 hr were fed as 20% of nutritionally adequate diets to weanling albino rats in longevity studies. Differences in the responses of rats fed diets containing the unheated and heated fats were generally small with respect to rates of gain, 12 th week and adult weights, efficiencies of utilization of absorbed energy, incidences of grossly detectable diseases and longevities. There were no indications that the feeding of the heated fats had shortened survival times in comparison with the comparable unheated fat. Animals fed hydrogenated vegetable shortening, heated or unheated, survived the longest. However, gains were slightly slower with the heated cotton-seed oil diets, and food efficiencies were slightly lower with the heated cottonseed oil and heated lard diets because of decreased digestibilities of these fats. The usual disabilities of old age such as nephritis, respiratory disease and periarteritis were present in all groups. The incidence of mammary tumors was high but did not differ significantly with the kind of fat, heaated or unheated. Tumor incidence other than mammary was similar in both sexes and there was no significant difference between fresh and heated fats. Absence of adverse effects attributable to the heated fats during the life span of the rats in further evidence of the safety of these fats of the quality customarily consumed by the human population.     

Sulfide and sulfate solid solubility in lime,magnesia, and calcined dolomite: Part I. CaS and CaSO4 solubility in CaO

In the present work the solid solubilities of CaS and CaSQ, in burnt lime were investigated by equilibrating lime with CO-CO₂-SO₂ mixtures at temperatures from 950 to 1300°C. Also, the equilibrium constants for the formation of CaS and CaSO₄ were determined. At high oxy-gen activities, corresponding to a CO₂/CO ratio >100 in the gas, the sulfur dissolves in lime primarily as sulfate ions. At lower oxygen activities (CO₂/CO <30), the sulfur goes into so-lution in lime essentially as sulfide ions. Over the temperature range investigated the limit-ing sulfide solubility is within 0.01 to 0.03 pct S, whereas the sulfate solubility is within 0.03 to 0.1 pct S, increasing with increasing temperature. An erratum to this article is available at .     

Cuprates and Ruthenates: Similarities and Differences

There is growing evidence that the p-wave superconductivity of Sr₂RuO₄ occurs primarily in the planar -band. Thus the minimum model for both cuprates and ruthenates is a single active band with onsite Coulomb interactions. Recent renormalization group analysis shows that such a model can show singlet d-wave or triplet p-wave pairing. The energy of the van Hove singularity in the band and the shape of the Fermi surface are the decisive factors at weak to moderate interaction strengths.     

A suggested energy-savings evaluation method for ACadjustable-speed drive applications

A procedure is offered for the evaluation of the energy savings obtained by the use of AC adjustable-speed drives on pumps, fans, and other types of driven equipment such as compressors or extruders and mixers. A method for the economic evaluation of the energy savings is also offered. The method that best insures that all the required factors will be considered is to calculate separately the energy usage by the adjustable-speed drive system and the base comparison system, and then evaluate the energy savings as the difference between the two usage figures. These procedures and the necessary databases have been incorporated into a user-friendly computer program that can be operated on any IBM PC or compatible computer