Materials Literature
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The efficiency of the H2O2 oxidation of 2,4,6-trichlorophenol (TCP) catalyzed by iron tetrasulfophthalocyanine (FePcS) is highly dependent on the pH value of the reaction mixture, the local hydrogen peroxide concentration and the organization of FePcS molecules in solution. Among the several forms of FePcS in aqueous…
The properties of complexes of five spiropyran-derived merocyanines with MgII, PbII, transition and rare-earth metal ions (Mn+, n = 2, 3) have been studied in acetone by steady-state and time-resolved techniques. Within nanoseconds, excitation of the spiropyran (Sp) form of 1′,3′,3′-trimethyl-6-nitro-8-methoxy-spiro[2…
The heat capacity of poly-p-dioxanone (PPDX), (CH2‒CH2‒O‒CH2‒COO‒)x, was determined using both differential scanning calorimetry (DSC) and temperature-modulated DSC (TMDSC) from 200 K to 430 K. Based on the new data and literature data, the heat capacity of the solid state was analyzed using an approximate group vibra…
We discuss the method for measuring surface charge density accumulated on the surface of a solid dielectric (insulating specimen) such as a supporting spacer in gas and vacuum insulated equipment. For such thick specimens, the probe response does not correspond to the charge density directly below the probe, so the me…
This paper presents a review of the theories based on wetting measurements/interfacial thermodynamics most frequently used to explain bacterial adhesion to solid surfaces. The physical meaning of data stemming from the application of the different theories is discussed and compared with current knowledge on interactio…
Local spin-density calculations are used to investigate the relationship between lattice distortions, magnetic ordering, and electronic properties in manganite perovskites. Lattice distortions are found to open pseudogaps at the middle of the majority spin ${e}_{g}$ manifold, which are more directly related to rotatio…
Calmodulin (CaM) is a primary Ca2+-binding protein found in all eukaryotic cells. It couples the intracellular Ca2+ signal to many essential cellular events by binding and regulating the activities of more than 40 different proteins and enzymes in a Ca2+-dependent manner. CaM contains two structurally similar domains…
Mesoporous aluminosilicate molecular sieves with the MCM-48 structure and atomic Si/Al ratios of 15−40 have been synthesized using aluminum chloride hexahydrate and aluminum sulfate as the sources of aluminum. The products were characterized by powder X-ray diffraction (XRD), thermal analysis (TG/DTA), diffuse reflect…
Transmission Fourier transform infrared spectroscopy has been used to identify gas-phase and surface-bound products and intermediates formed during the gas-phase photooxidation of trichloroethylene (TCE) on TiO 2 and ZnO. Several factors are found to influence the gas-phase product distribution for this reaction. On c…
Charge-transfer salts between BDNT and M(mnt)2 (M=Ni, Pd, Pt, and Au) have been prepared by mixing BDNT–(SbCl6)2 and (TBA)2 –[M(mnt)2 ] and by electrochemical oxidation of BDNT in TBA–[M(mnt)2 ] solution. Almost all powdery samples of (1:1) salts show high electrical conductivity. The valence of M(mnt)2 was determined…
A comparative study of Cu/Al 2 O 3 (CuA) and Cu/CeO 2 /Al 2 O 3 (CuCA) catalysts, examining the redox processes induced by thermal treatments in CO on preoxidized samples, has been performed by means of temperature-programmed techniques (TPR, TPO, and TPD) and FTIR and EPR spectroscopies. The results evidence differen…
Two kinds of twinning morphologies of ZnO crystallites prepared under hydrothermal conditions were obtained. The twin relations of the crystallites could be influenced by additives. The twinned crystallites in the pure H2O or weak basic solutions (1 N KOH) are bipyramidal and take (0001-) as the twin and composition p…
A summary of selected thermophysical properties of refractory metallic carbides is reported with a critical evaluation of the data. A target of this work was to collect a wide and selected set of data spanning from physical and physico-chemical parameters to more specialistic physico-mechanical items of informations,…
An inclusion compound [Fe(dpp)2(NCS)2]·py has been prepared and characterized by magnetic and Mössbauer spectral measurements (dpp = dipyrido[3,2-a∶2′3′-c]phenazine and py = pyridine); it shows a spin-crossover behavior with a large hysteresis (ΔTc = 40 K).
Spectrophotometric absorption and fluorescence measurements of spiropyrans 2 and 3 modified with chelating functionalities, in the presence of Ca2+ and Zn2+, provide evidence of a thermally stable spiropyran–merocyanine photoswitch that is modulated by the metal cations.
Sorption of CO 2 in poly(methyl methacrylate) at 35−200 °C and concurrent dilation of the polymer at 35−85 °C over a pressure range up to 50 atm were studied. Dissolution and Flory−Huggins interaction parameters for the gas in the polymer, not only in the rubbery state but also in the glassy state, were estimated by a…
Three viable technologies for storing hydrogen fuel on cars are currently available: compressed gas, metal hydride adsorption, and cryogenic liquid. However, each of these has significant disadvantages: volume, weight, boiling losses, or energy to compress or liquefy the hydrogen. Two alternative approaches are analyz…
In this paper, Brunomer–Emmett–Teller (BET) surface area, X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and temperature programmed reduction (TPR) are used to investigate the interactions between CuO and the TiO2 (anatase) support, in samples prepared by impregnating the TiO2 support with an aqueous…
Chitosan has potential biomedical applications that may require the final products to be sterilized before use. The gamma irradiation of purified and highly deacetylated chitosan fibers and films at sterilizing doses (up to 25 kGy) caused main chain scissions. The viscosity average molecular weight of the polymer decr…
We investigate the relationship between the fabric drape coefficient from the Cusick drapemeter and mechanical properties tested on the Kawabata Evaluation System for Fabrics (KES-F) for woven fabrics. This is the first attempt at determining a compre hensive relationship between the fabric drape coefficient and mecha…