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Experimental coronary artery disease (CAD) was produced in dogs which had chronically implanted catheters for the measurement of mean arterial pressure (MAP) and coronary blood flow (CBF) using the 85Kr clearance technique. Resting CBF was determined in the conscious animal during intracoronary infusion of saline and the 'maximum' CBF was determined by infusion of ATP (0s·6 and 0·8 mg/min). Repeated observations revealed only small and variable changes in MAP and CBF of control dogs over a two-month period and of dogs fed an atherogenic diet containing thiouracil and cholesterol for 47 and 54 days. CAD was produced by intracoronary infusion of allylamine and intravenous infusion of egg yolk emulsion. This treatment results in arteritis, lipid deposition, and fibrosis. The disease was associated with a 37% decrease in maximum CBF within two to five days. Resting CBF decreased 16% and MAP was not altered significantly. After the initial decrease in maximum CBF, there is a stable period with decreased maximum CBF for at least six weeks. [ABSTRACT FROM PUBLISHER]

The mass spectra of the hops derived humulinic acids, isohumulones and hulupones are discussed. The fragmentations are in accordance with those found for model compounds. [ABSTRACT FROM AUTHOR]

The Mass spectra of some 1,3-cyclopentanediones and 1,2,4-cyclopentanetriones, related to compounds encountered in the chemistry of hops bitter constituents have been determined. Methyl substituted compounds mostly show ring degradation, while for longer alkyl groups and acyl groups, fragmentations in the side chain carry most of the total ionization. When both alkyl (> 2C) and acyl substituents are present, fragmentations in the alkyl group always occur before those in the acyl side chain. The observed degradation processes are useful for the interpretation of the spectra of hop bitter acids and derived products. [ABSTRACT FROM AUTHOR]

The mass spectra of 2- and 4-substituted 1,3-cyclopentanediones are discussed. Methyl substituted compounds display mostly ring degradation, while for longer alkyl groups fragmentations in the side chain are responsible for most of the total ionization. As was found for other 1,3-diketones the spectra of 1,3-cyclopentanediones show typical and separate fragmentations for both diketoand enol-molecular ions. [ABSTRACT FROM AUTHOR]

The development of combining a flexible polyurethane foam to textiles has given a new concept to clothing. This paper deals with the manufacture of polyurethane foam, the various techniques for combining, standards and testing, and applications. [ABSTRACT FROM AUTHOR]

The article examines the efficiency of teacher education programs in preparing people to teach in inner schools with foreign populations in the U.S. This program is being evaluated whether it could equip white teachers to teach black students or are blacks the only one capable to teach black. There are four premises being presented such as preservice programs offers the primary preparation for the beginning teacher, the application of basic principles will result in effective teaching, both in-service and preservice programs must be flexible and lastly, this program should provide techniques and principles of effective teaching.