Thermogravimetric analysis revealed that the maximum degradation temperature has been shifted to higher region for in situ composites compared to PMMA itself-and the ex situ composites indicated better thermal stability. X-ray diffraction study of composites also indicates that in situ composites functionalization incorporated MWCNT particles in the polymer chain. (C) 2011 Wiley Periodicals, Inc. J Appl Polym Sci 120: 2954-2961, 2011″
“PURPOSE: To develop a method to process
Scheimpflug images to estimate higher-order variations in ocular surfaces.
SETTING: New England College of Optometry, Boston, Massachusetts, USA.
METHODS: Zernike polynomial functions were used rather than lower-order surface functions to fit the ocular surfaces to evaluate higher-order variations. selleck compound A related buy IPI-549 ray-tracing method was developed to correct optical
distortion of the Scheimpflug image.
RESULTS: The new method to process Scheimpflug images showed higher-order variations in the posterior corneal surface. In a simulation, ignoring higher-order variations in the anterior corneal surface, as in previous studies, produced an error as high as 202% for some estimated Zernike coefficients of the posterior corneal surface.
CONCLUSION: The results indicate that it is necessary to correct refractive distortion in Scheimpflug images using higher-order surface functions and that the method developed in this study can be used to process scheimpflug images for measurement of ocular wavefront 7-Cl-O-Nec1 mouse aberrations.”
“P>The regulation of pollen tube growth by the phospholipid phosphatidylinositol-4,5-bisphosphate (PtdIns(4,5)P(2)) is not
well understood. The Arabidopsis genome encodes two type A phosphatidylinositol-4-phosphate (PI4P) 5-kinases, PIP5K10 and PIP5K11, which are exclusively expressed in pollen and produce PtdIns(4,5)P(2)in vitro. Fluorescence-tagged PIP5K10 and PIP5K11 localized to lateral subapical plasma membrane microdomains in tobacco pollen tubes in a pattern closely resembling the distribution of PtdIns(4,5)P(2,) with the exception of notably weaker association at the extreme apex. Overexpression of PIP5K10 or PIP5K11 in tobacco pollen tubes resulted in severe tip swelling and altered actin fine structure similar to that reported for overexpression of tobacco Nt-Rac5, a monomeric GTPase known to regulate the actin cytoskeleton. Increased sensitivity of Arabidopsis pip5k10 pip5k11 double mutant pollen tubes to Latrunculin B (LatB) further supports a role for type A PI4P 5-kinases in controlling the actin cytoskeleton. Despite the disruption of both its type A PI4P 5-kinases, the pip5k10 pip5k11 double mutant was fertile, indicating that one of the remaining type B PI4P 5-kinase isoforms might be functionally redundant with PIP5K10 and PIP5K11.