Role of Interfacial Interaction in Orientation of Poly(N-isopropylacrylamide) Chains on Silicon Substrate.
Studies of self-assembled PNIPAM films on hydrophilic and hydrophobic substrates that are grown below and above lower critical solution temperature (LCST) have been performed to understand the role of intramolecular and polymer–substrate interactions in self-assembly using near edge X-ray absorption fine structure (NEXAFS) spectroscopy, atomic-force microscopic (AFM) and density functional theory (DFT). The NEXAFS spectra suggest that the polymer chains are oriented similarly on hydrophilic as well as hydrophobic substrate although the chains were having different morphologies in the solution, whereas, AFM studies shows that the morphology of the polymer chains on the two substrates are widely different. NEXAFS absorption spectra for free molecule and that with effects of substrate were calculated using DFT. The results show that on hydrophobic substrate polymer–substrate interaction is stronger as compared to that with hydrophilic one, however, for both cases this interaction plays dominant role over the...
C.-H. Wang; S. Mukherjee; A. K. M. Maidul Islam; Y.-W. Yang; M. Mukherjee
We recently generalized the formerly alignment-dependent multivariate image analysis applied to quantitative structure–activity relationships (MIA-QSAR) method through the application of the discrete Fourier transform (DFT), allowing for its application to noncongruent and structurally dive ... more
Poly-ADP-ribosylation (PARylation) is a protein posttranslational modification (PTM) that is critically involved in many biological processes that are linked to cell stress responses. It is catalyzed by a class of enzymes known as poly-ADP-ribose polymerases (PARPs). In particular, PARP1 is ... more
This review focuses on the type A cytochrome c oxidases (CcO), which are found in all mitochondria and also in several aerobic bacteria. CcO catalyzes the respiratory reduction of dioxygen (O2) to water by an intriguing mechanism, the details of which are fairly well understood today as a r ... more
Rohm and Haas Powder Coatings is delighted to announce that its Reading, Pennsylvania, facility is the first site in the world to receive the RCMS® Site Certification awarded by the American Chemical Council (ACC).
When Raj Gupta, Chairman and CEO of Rohm and Haas Company, became Chairman ... more