the effects of solvent, temperature, time, weight percent of catalyst on the rate and mechanism of cyclization of natural rubber (nr) was studied in toluene and xylene solutions having tin tetra chloride catalyst (sncl4). iodometric titration show, with 8% sncl4 (based on polymer weight) cyclization occurs, leaving 27.4% of the total unsaturation. infrared spectra of cyclized nr show decreased ...

This review shows the equal or greater importance of leaded gasoline-contaminated dust compared to lead-based paint to the child lead problem, and that soil lead, resulting from leaded gasoline and pulverized lead-based paint, is at least or more important than lead-based paint (intact and not pulverized) as a pathway of human lead exposure. Because lead-based paint is a high-dose source, the b...

This study assessed public acceptance for two new vectorial control techniques for Chagas' disease: insecticidal paint and fumigant canisters. The study compared the two with traditional fenitrothion insecticide spraying. An experimental field study was performed in an endemic area of central Honduras from August to November 1992, a year after the initial application of the treatments. The obje...

Common Names/Other names Canadische, Eye Balm, Eyebalm, Eye Root, Eyeroot, Gelbwurzel, Golden seal, Goldenroot, Goldenseal, Goldsiegel, Ground Raspberry, Hidraste, Hydrastis, Idraste, Indian Dye, Indian Paint, Indian Plant, Indian Tumeric, Indian Turmeric Jaundice Root, Orange Root, Sceau D’Or, Tumeric Root, Turmeric Root, Warnera, Wild Curcuma, Yellow Indian Paint, Yellow Paint, Yellow Paint R...

A single point viscosity measurement has been proven meaningless in determining the rheological and application properties of a paint. Paints having the same “one point“ viscosity can hove different settling, sag, and leveling properties. These rheological differences are graphically depicted by means of viscosity profiles obtained through the use of low and high shear rate viscometers. A metho...

A computer graphic system has been developed that permits the interactive design of new automotive finishes. The software makes use of a reflection model for car paint that is based on industry standards for measuring the appearance characteristics of the paint. These measurements include gloss for the clearcoat and three aspecular measurements for the metallic basecoat. The program interface p...

An acute confusional state was observed to follow heavy exposure to polyurethane gloss paint fumes in a previously healthy 60 year old man. This state remitted over a 3-day period, but was followed by transient bone marrow suppression and evidence of liver cell damage. The corroborated absence of other toxins and the temporal association of exposure to paint fumes suggest that a volatile paint ...