Materials Literature
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The different kinds of crystalline orientations which can occur in industrially relevant isotactic polypropylene (i-PP) films are compared with those generally observed for other semicrystalline polymers. The peculiar bimodality typical of the uniplanar-axial orientation which is present in two-step biaxially stretche…
The gene of chitinase in the silkworm, Bombyx mori, generates four mRNA products by alternative splicing. Nucleotide sequences of the entire gene for chitinase and respective cDNAs demonstrate that the pre-mRNA undergoes alternative splicing at both the 5' and 3' regions. At the 5' region, the pre-mRNA experienced dif…
UNLABELLED: The aim of the present study was to verify the effect of chitosan as a possible adjuvant in the complex management of obesity. METHOD: Fifty obese women (22-59 years, BMI > 30) participated in the study. A six months program consisted of 2-hour meetings with a physician, psychologist and dietitian, in a gr…
Abstract Metal arachidate Langmuir–Blodgett (LB) films with Pb 2+ and Cd 2+ cations and varying numbers of monomolecular layers (2 and 4 monolayers, ML) were deposited on trimethylsilylated glass substrates. The arachidate salt formation was commenced during the film deposition from a water‐based solution. The extent…
The transformation of 2/1-mullite single crystals into stable 3/2-mullite was investigated using reaction couples of 2/1-mullite cut parallel to (001) and silica glass at 1650 °C. A thin layer of 3/2- mullite formed at the surface of the parent 2/1-mullite crystal. Between 3/2- and 2/1-mullite a gradual transition lay…
Abstract Tin samples have been exposed in industrial, rural and urban outdoor atmospheres. Corroded surfaces were studied with Fourier transform infrared reflection absorption spectroscopy (FTIRAS), x‐ray diffraction (XRD), SEM, energy‐dispersive spectroscopy (EDS) analysis and Mössbauer spectroscopy. Corrosion is con…
Ferroelectric 0.7Pb(Mg 1/3 Nb 2/3 )O 3 –0.3PbTiO 3 (PMN‐PT) thin films were deposited on ZrO 2 /SiO 2 /silicon substrates using a chemical‐solution‐deposition method. Using a thin PZT film as a seed layer for the PMN‐PT films, phase‐pure perovskite PMN‐PT could be obtained via rapid thermal annealing at 750°C for 60 s…
Abstract The flammability of polypropylene (PP) and recycled PP composite systems was thoroughly investigated by using cone calorimetry and thermogravimetry techniques in order to quantify the effect of brominated and chlorinated fire‐retardant systems. In this study, the efficiency of the fire‐retarding systems was d…
This paper reports the studies conducted on removal of oxides of nitrogen (NOx) from diesel engine exhaust using electrical discharge plasma combined with adsorbing materials such as molecular sieves. This study is being reported for the first time. The exhaust is taken from a diesel engine of 6 kW under no load condi…
Raman mapping images have been obtained for compatibilized and uncompatibilized polymer blends in films of Nylon 12 and high density polyethylene (HDPE) (blend ratios were 20/80, 50/50, and 80/20). A total of 400 Raman spectra were measured for each sample with areas of 100 μm 2 and in step sizes of 0.5 μm (for 20 × 2…
The effect of sodium N,N‐diethyl dithiocarbamate (SDEDTC) on the corrosion of carbon steel in 0.5mol/L hydrochloric acid (HCl) solution was studied using weight loss, potentiodynamic polarisation curves and impedance measurement methods. Experimental results revealed that SDEDTC acted as an inhibitor in acid environme…
Magnetic susceptibilities (χ M ) of three kinds of 3-(aryl-substituted)-1,5-diphenyl-verdazyl radical crystals (aryl: 4-fluorophenyl ( p -FPDV), 4-pyridyl ( p -PyDV), and 3-pyridyl ( m -PyDV)) have been measured between 1.8 and 300 K, showing a broad maximum T max at 200, 272, and 157 K, respectively. The values of T…
Cyclic deformation behaviour of Ti-5at.%Al single crystals oriented for [21 10] was investigated in the total (i.e. elastic + plastic) axial strain amplitude from 0.195% to 0.798% at room temperature in air. The crystals displayed an initial cyclic hardening followed by a striking softening period, and then a saturati…
Abstract Condensation reaction of 3,6-diphenylphthalonitrile and 2,3-dicyano-5,6-diethyl-1,4-pyrazine employing the modified lithium method has efficiently produced the novel donor-acceptor phthalocyanine derivatives having adjacently-fused pyrazine rings.
Perovskite lead hafnate (PbHfO 3 , PH) nanoparticles that were free from halides and organics were synthesized via the oxidant peroxo method. Stoichiometric amounts of hafnium nitrate (HfO(NO 3 ) 2 ) and lead nitrate (PbHfO 3 ) were dissolved in a diluted hydrogen peroxide (H 2 O 2 ) aqueous solution, which was slowly…
Abstract Fluoropolymer thin films have been deposited on (100)‐oriented single‐crystal silicon substrates via argon plasma sputtering of a poly(tetrafluoroethylene) (PTFE) target and plasma polymerization of 1H, 1H, 2H‐heptadecafluoro‐1‐decene (HDFD). The surface composition and molecular structure of the deposited fl…
This paper presents the results of a project aimed at the development of reliable corona-suppression systems for high voltage rotating machines. These systems are based on both conducting and semi-conducting dry and B-stage tapes as well as paints of different resistivity. Three groups of anti-corona systems were deve…
A series of aliphatic polyacetamidines (1) with the common structure [(CH2)mNC(CH3)NH]n was synthesized by the phenol-catalyzed melt polycondensation reaction of various aliphatic diamines with triethyl orthoacetate. The resulting polyacetamidines were characterized by 1H and 13C NMR spectroscopy. It could be sho…
ADVERTISEMENT RETURN TO ISSUEPREVCommunication to the...Communication to the EditorNEXTCylindrical Lamellar Habits in Monodisperse Centrally Branched AlkanesH. M. White, I. L. Hosier, and D. C. BassettView Author Information J.J. Thomson Physical Laboratory, University of Reading, Reading RG6 6AF, UK Cite this: Macrom…
Abstract It is now well established that protein adsorption constitutes the first step of the mechanism leading to biofilm formation, which is a precursor of the biofouling. Biofouling is a major problem for any activity in seawater. In order to improve our basic knowledge of the biofilm formation mechanism, the role…