In this work we study the effect of some electrical prosperities on synthetic rubber reinforced with carbon black diluted in heptanes with concentrations from 0.2% gm/mole to 2.0% gm/ mole in temperatures range (100, 150, 200, 250, 300) C associated with amount weight of black carbon 5wt% added to the diluted rubber. The results of electrical properties measurement of Buna rubber reinforced wit...

Background: The extent to which polymorphonuclear leukocytes and monocytes/macrophages contribute to the pathobiology of cerebral ischemia and stroke is an issue of long-standing contradiction and controversy. Recent developments in the ability to selectively modify leukocyte adhesion with antiadhesion antibodies and the potential clinical application of this therapeutic approach have spurred a...

Z. Naturforsch. 53 b, 1379-1385 (1998); received June 26, 1998 Mononuclear Complexes, Nickel, Amine-Thiolate Ligands, Solid-State Structures, SolutionState Structures The syntheses of N-alkylated derivatives of the arenethiol 4-terf-butyl-2,6-(diaminomethyl)thiophenol and their coordination properties are reported. Compounds 4-terf-butyl-2,6-di(/V-isopropyl-aminomethyl)thiophenol (3) and 4-terf...

K-ras point mutations are often detected in part of the lung carcinomas. For the validation of a highly sensitive and rapid assay for known point mutations, Point-EXACCT (Biochim Biophys Acta 1998; 1379:42-52), we analyzed 89 non-small cell lung carcinomas and compared the results with two sequencing methods. No point mutations were found with double-stranded sequencing. Single-stranded sequenc...

Background. Invasive differentiated thyroid cancer (DTC) is relatively frequent, yet there is a paucity of specific guidelines devoted to its management. The Endocrine Committee of the American Head and Neck Society (AHNS) convened a panel to provide clinical consensus statements based on review of the literature, synthesized with the expert opinion of the group. Methods. An expert panel, selec...

Held et al. (1979) Vision Res. 19, 1377-1379, reported that infants' psychometric functions in preferential looking experiments exhibit a region of below chance performance or "negative preference". They argued from this that previous preferential looking experiments may have systematically underestimated acuity because they ignored this negative preference. We present data from an experiment d...