Chemistry

The positive SIMS spectrum of poly(methyl methacrylate) (PMMA) has been obtained with a mass resolution in excess of 8000 and all the components assigned up to m/z 200 based on accurate mass measurements. Aspects of the interpretation of the spectrum, previously based on ...

8, 24, 1129 (1968); (j) K. Bowman and 2. Dori. Chem. Commun., 636 (1968). (22) (a) D. Hall, A. D. Rae, and T. N. Waters, Acta Crysfallogr., 20, 160 (1966); (b) Yu. N. Mikhailov, V. G. Kuznetsov, and E. S. Kovaleva. J. Sfrucf. Chem. (USSR), 6, 752 (1965). (23) (a) JL Hoard ...

The traditional view of atherosclerosis has recently been expanded from a predominantly lipid retentive disease to a coupling of inflammatory mechanisms and dyslipidemia. Studies have suggested a novel role for polymorphonuclear neutrophil (PMN)-dominant inflammation in the development of atherosclerosis. Human neutrophil peptides (HNPs), also known as α-defensins, are secreted and released from PMN granules upon activation and are conventionally involved in microbial killing. Current evidence suggests an important immunomodulative role for these peptides. HNP levels are markedly increased in inflammatory diseases including sepsis and acute coronary syndromes. They have been found within the intima of human atherosclerotic arteries, and their deposition in the skin correlates with the severity of coronary artery diseases. HNPs form complexes with LDL in solution and increase LDL binding to the endothelial surface. HNPs have also been shown to contribute to endothelial dysfunction, l...

The eye is a complex biological system, composed of different cell types, irrigated by several physiological solutions, subject to various mechanical stresses and which environment can also be affected by diurnal variations. As a biomaterial is placed into this environment, protein adsorption, cell adhesion or activation may occur. The exact molecular mechanisms involved in biocompatibility of ocular biomaterials have not yet been determined and this chapter highlights some of the current knowledge related to biological mechanisms and material properties that affect the ocular response. The effects of aging and disease on ocular biocompatibility are also discussed.

A compound of formula I ** (See formula) ** in which: R1 is (Ar1) alkyl, (Ar1) (CON (R8) (R9)) alkyl, (Ar1) (CO2R14) alkyl, (Ar1) hydroxyalkyl or (Ar1) oxyalkyl; R2 is hydrogen, alkyl, hydroxy or alkoxy; R3 is hydrogen, halo, hydroxy, cyano, alkyl, cycloalkyl, C5-7 cycloalkenyl, haloalkyl, alkoxy, alkylthio, haloalkoxy, N (R8) (R9), NHAr2, N (R6) SO2R7, N (R6) COR7, N (R6) CO2R7, OCOR 7, OCO2R7, OCON (R8) (R9), OCH2CO2R7, OCH2CON (R8) (R9), COR6, CO2R6, CON (R8) (R9), SOR7, S (= N) R7, SO2R7, SO2N (R6) (R6), PO (OR6) 2, C2-4 alkynyl (R12), R13, Ar2 or Ar3; R4 is hydrogen, halo, hydroxy, cyano, alkyl, alkoxy, haloalkyl, haloalkoxy or N (R6) (R6); R5 is hydrogen, halo, hydroxy, cyano, alkyl, alkoxy, haloalkyl, haloalkoxy or N (R6) (R6); R6 is hydrogen, alkyl or cycloalkyl; R7 is alkyl or cycloalkyl; R8 is hydrogen, alkyl, hydroxyalkyl, alkoxyalkyl or dialkylaminoalkyl; R9 is hydrogen, alkyl, hydroxyalkyl, alkoxyalkyl or dialkylaminoalkyl; or N (R8) (R9) taken together is azetidinyl, p...