Results show that BCE/HBPPO has significantly lower curing temperature than BCE owing to the different curing mechanisms between the two systems, the difference also brings different crosslinked networks and thus dielectric properties. The dielectric properties are https://www.selleckchem.com/products/ulixertinib-bvd-523-vrt752271.html frequency and temperature dependence, which
are closely related with the content of HBPPO in the BCE/HBPPO system. BCE/2.5 HBPPO and BCE/5 HBPPO resins have lower dielectric constant than BCE resin over the whole frequency range tested, while BCE/10 HBPPO resin exhibits higher dielectric constant than BCE resin in the low frequency range (<10(4) Hz) at 200 degrees C. At 150 degrees C or higher temperature, the dielectric loss at the frequency lower than 10 2 Hz becomes sensitive to the content of HBPPO. These phenomena can be attributed to the molecular relaxation. Two relaxation processes (alpha- and beta-relaxation processes) LY2157299 order are observed. The beta-relaxation process shifts toward higher frequency with the increase of temperature because of the polymer structure and chain flexibility; the alpha-relaxation process appears at high temperature resulting from the chain-mobility effects. (C) 2011 Wiley Periodicals, Inc. J Appl Polym Sci 121: 2113-2122,
“The continuing advances in computed tomographic (CT) technology in the past decades have provided ongoing opportunities to improve CT image quality and clinical practice and discover
new clinical CT imaging applications. New CT technology, however, has introduced new selleck compound challenges in clinical radiology practice. One of the challenges is with intravenous contrast medium administration and scan timing. In this article, contrast medium pharmacokinetics and patient, contrast medium, and CT scanning factors associated with contrast enhancement and scan timing are presented and discussed. Published data from clinical studies of contrast medium and physiology are reviewed and interpreted. Computer simulation data are analyzed to provide an in-depth analysis of various factors associated with contrast enhancement and scan timing. On the basis of basic principles and analysis of the factors, clinical considerations and modifications to protocol design that are necessary to optimize contrast enhancement for common clinical CT applications are proposed. (C) RSNA, 2010″
“The impact of soaking, cooking, and industrial dehydration on the phenolic profile, antioxidant activity, and functional properties of two bean varieties (Cannellini and Pinta) was investigated.