The combustion properties and thermal stability of PLA/APP/TT23 and PLA/APP/TT4 composites were evaluated by UL-94 burning tests, limiting oxygen index (LOI), cone calorimeter tests and TGA, the chemical structure of char residues were analyzed by FTIR and XPS. It can be concluded that PLA with JQ-EZ-05 30 wt % of APP/TT4 (weight ratio 5 : 1) achieved the greatest flame retardancy. Moreover, the continuous and expansionary char layer observed from SEM images proved better char forming ability of TT4 than that of TT23. (c)
2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015, 132, 42086.”
“Twenty-two compounds of substituted benzoylguanidine derivatives were designed and synthesized as potent NHE1 inhibitors. Twelve compounds showed more potent NHE1 inhibitory activity than cariporide. The activities of compounds 7e, 7h and 7j (IC50 = 0.073
+/- 0.021, 0.084 +/- 0.012 and 0.068 +/- 0.021 nmol/L, respectively) were two orders of magnitude higher than that of cariporide (30.7 +/- 2.5 nmol/L). Myocardial cells in vitro screening showed 7j had highlighted protective effect on cardiomyocytes subjected to hypoxia/reoxygenation. Thus it is valuable for further investigation. (C) 2011 Elsevier Masson SAS. LY2157299 molecular weight All rights reserved.”
“Protein kinase C (PKC) has been widely implicated in positive and negative control of cell proliferation. We have recently shown that treatment of non-small cell lung cancer (NSCLC) cells with phorbol 12-myristate 13-acetate (PMA) during G(1) phase inhibits the progression into S phase, an effect mediated by PKC delta-induced up-regulation of the cell cycle inhibitor p21(Cip1). However, PMA treatment in asynchronously growing NSCLC cells leads to accumulation of cells in G(2)/M. Studies in post-G(1) phases revealed that PMA induced an irreversible G(2)/M cell cycle arrest in NSCLC cells and conferred morphological and biochemical features of senescence, including elevated
SA-beta-Gal activity and reduced telomerase activity. Remarkably, this effect see more was phase-specific, as it occurred only when PKC was activated in S, but not in G(1) phase. Mechanistic analysis revealed a crucial role for the classical PKC alpha isozyme as mediator of the G(2)/M arrest and senescence, as well as for inducing p21(Cip1) an obligatory event for conferring the senescence phenotype. In addition to the unappreciated role of PKC isozymes, and specifically PKC alpha, in senescence, our data introduce the paradigm that discrete PKCs trigger distinctive responses when activated in different phases of the cell cycle via a common mechanism that involves p21(Cip1) up-regulation.”
“Objectives Previous studies in HIV-infected populations have yielded conflicting results on the effect of antiretroviral therapy (ART) on cognition.