The use of computer graphics in the evaluation of sanitary landfill sites

For decision-makers, the contour map is not always the best communication device when evaluating the impact of a sanitary landfill on the visual aspects of the landscape. A better alternative is the method of showing the shape of the topography by using computer graphics to produce three-dimensional block diagrams. The Monroe County, Indiana sanitary landfill was used as a case study.     

Phase equilibria in a ternary system saponin-sunflower oil monoglycerides-water; interactions between aliphatic and alicyclic amphiphiles

The ternary phase diagram of saponin-sunflower oil monoglycerides-water is dominated by an extensive region consisting of a liquid phase. in this micellar solution there seems to be a gradual change from an aqueous to a hydrocarbon type of continuous medium. a lamellar liquid crystalline phase separates these two liquid structures at high water content. a viscous isotropic cubic phase is also observed in this phase diagram which according to its x-ray diffraction is the same phase as occurring in simple monoglyceride-water systems.     

A potentiostatic transient study of the passivation of carbon steel in 1 M NaOH

The potentiostatic transient behaviour of carbon steel in 1 M NaOH at 20 ± 2°C is described. The data suggest that the initial film on the metal surface forms by a nucleation and lateral growth mechanism. Film thickening and reduction transients were found to obey the empirical relationship i = kt^?n. Both the exponent, n, and the growth constant, k, are potential dependent. However, the observed potential dependencies for these constants suggest that none of the current growth theories are capable of describing quantitatively the formation of oxide—hydroxide films on carbon steel in 1 M NaOH at ambient temperature.     

An epidermal papilloma of the Atlantic salmon I: Epizootiology, pathology and immunology

Papillomatosis of Atlantic Salmon (Salmo salar) was studied with regard to epizootiology, gross and histologic pathology, and host response. It was found to be a condition of parr in their second summer, but also occasionally of young adult fish (smolts and grilse) which have adapted to salt water. The lesion was plaque-like to papillomatous and consisted of stratified squamous epithelium with supporting stroma. Immunologic findings tended to support histologic observations that the lesion was ultimately sloughed as a result of a cell mediate immune response.     

WATER-SENSITIVITY IN BARLEY SEEDS II. ASSOCIATION WITH MICRO-ORGANISM ACTIVITY

The inhibitory effect of excess water on the germination of water-sensitive seeds can be overcome by adding mixtures of antibiotics. A single antibiotic has no effect: a mixture of at least one fungal and one bacterial antibiotic is essential, and on freshly harvested seed an even more complex mixture may be necessary. Measurements of the gas exchange of the seeds in the presence and absence of antibiotics suggest that micro-organisms are relatively more active when seeds are placed in excess water. About 80% of the seeds which fail to germinate as a result of excess water lose viability within 6 days. It is suggested that water-sensitive seeds contain large mixed populations of micro-organisms. When set to germinate in excess water the entry of oxygen is physically impeded and also competed for by the microflora. Consequently the rate of germination is decreased; some micro-organisms may attack the embryos so that most of the seeds lose viability.     

Purification and characterization of an abnormal factor IX (Christmas factor) molecule. Factor IX Chapel Hill

Human Factor IX (Christmas factor) was isolated from the plasma of a patient with mild hemophilia B. The patient's plasma contained 5% Factor IX clotting activity but 100% Factor IX antigenic activity as determined by immunological assays, which included inhibitor neutralization and a radioimmunoassay for Factor IX. This abnormal Factor IX is called Factor IX Chapel Hill (Factor IXCH). Both normal Factor IX and Factor IXCH have tyrosine as the NH2-terminal amino acid. The two proteins have a similar molecular weight, a similar amino acid analysis, the same number of gamma-carboxyglutamic acid residues (10 gamma-carboxyglutamic acid residues), and a similar carbohydrate content. Both exist as a single-chain glycoprotein in plasma. The major difference between normal Factor IX and Factor IXCH is that the latter exhibits delayed activation to Factor IXa in the presence of Factor XIa and Ca2+. Thus, Factor IXCH differs from other previously described abnormal Factor IX molecules.