Nitrogenated derivatives of cellulose, and namely chitin and chitosan, are of commercial interest because of their antibacterial activity, biocompatibility, biodegradability and sorption ability. Structure and some physicochemical properties of these derivatives have been studied by methods of wide-angle X-ray scattering (WAXS), microcalorimetry and sorption. To determine the crystallinity degr...

objective: an association between poor oral health and chronic lung disease has recently been reported. the purpose of this study was to explore this potential association between asthma and periodontal disease. materials and methods: this is a descriptive case controlled study. the samples were selected from patients referred to respiratory disease clinic in a hospital in tehran, iran. the stu...

The friction and wear properties of poly(ethylene) terephthalate (PET) filled with alumina nanoparticles were studied. The test matrix varied article size, loading and crystallinity to study the coupled effects on the tribological properties of PET-based nanocomposites. The nanocomposite amples were tested in dry sliding against a steel counterface. The wear rate ranged from 2× 10−6 to 53× 10−6...

Being able to predict products’ degrees of crystallinity, and thereby optimize their crystallization processes, is of great significance for producing high quality polymeric products in injection molding. Injection molding simulation software can simulate polymers’ density results during the packing stage, and these predicted density results can be used to calculate polymers’ crystallinity resu...

Given that terahertz (THz) radiation responds to intermolecular forces such as hydrogen bonds, THz time-domain spectroscopy (THz-TDS) has expanded possibilities in cellulose research. In this study, THz-TDS was used investigate the crystallinity of three types cellulose-based materials. Microcrystalline (MCC) and wood were ball milled at different times, pseudo-wood a mixture MCC lignin mass fr...

Károly Mirnics,1,2* Zeljka Korade,3* Dominique Arion,1 Orly Lazarov,4 Travis Unger,1 Melissa Macioce,1 Michael Sabatini,1,2 David Terrano,4 Katherine C. Douglass,1 Nina F. Schor,3 and Sangram S. Sisodia4 Departments of 1Psychiatry, 2Neurobiology, and 3Pediatrics, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania 15261, and 4Center for Molecular Neurobiology, University of Ch...

This paper presents TrAVis (Tracking Data Analysis and Visualization Tools), a Web-based system, implemented to assist the participants in the learning process in analyzing the tracking data of ComputerMediated Communication activities. While most of the existing systems in the same genre are exclusively dedicated to the teachers and only a few are accessible by students, TrAVis is objectively ...

Hedgehog (Hh) proteins signal by inhibiting the proteolytic processing of Ci/Gli family transcription factors and by increasing Ci/Gli-specific activity. When Hh is absent, phosphorylation of Ci/Gli triggers binding to SCF ubiquitin ligase complexes and consequent proteolysis. Here we show that multiple successively phosphorylated CK1 sites on Ci create an atypical extended binding site for the...

ess the relationship between umbilical cord blood gases at birth and morphology of umbilical cord, in a prospective study of 200 consecutive term delivery, we investigated the relationship between umbilical cord morphology characteristics (umbilical crd length, number of vascular coil, coiling index) and color of amniotic fluid and umbilical vessel blood gases. statistically significant linear ...