Materials Literature
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Abstract Protokeelia is described as a new and rare pennate diatom genus in China. Its valve includes two parts: ventral valve and dorsal valve. The ventral valve is more or less convex or concave. The raphe runs in a distinct elevated and thickened siliceous ridge. In the internal valve, beneath the raphe are fibulae…
The aim of this research was to compare two standardized soil extraction methods [electroultrafiltration (EUF) and ammonium acetate–lactate (AL)] regarding potassium (K) and phosphorus (P) availability in pseudogley soils. In total, 60 pseudogley soil samples from 12 agricultural sites in eastern Croatia (each represe…
The products and kinetics of the thermolysis of 1,2-dioxaspiro[2,5]octane in cyclohexanone and cyclohexanone-CCl 4 mixtures are studied. 1,2-Dioxaspiro[2,5]octane is consumed via two parallel routes: isomerization to oxepan-2-one and solvent (cyclohexanone) oxidation with the partial escape of radicals from the cage (…
Peroxide-containing supramolecular structures prepared by reacting lithium aluminum layered double hydroxides (Li-Al LDHs) with concentrated hydrogen peroxide solutions were characterized by Raman spectroscopy. These compounds were formulated as [LiAl 2 (OH) 6 ](OH) · H 2 O 2 · H 2 O(I) and [LiAl 2 (OH) 6 ](OOH) · H 2…
We have performed thermal studies of a charge disproportionation induced metal-insulator transition in θ-(BEDT-TTF) 2 RbZn(SCN) 4 system. We have detected a sharp peak in a heating process and a broad hump in a cooling process with a remarkable hysteresis. This peculiar transition could be easily suppressed by a rapid…
Ca-Ti-O films were prepared on quartz substrates by MOCVD using the precursors of Ti(O-i-Pr) 2 (dpm) 2 and Ca(dpm) 2 . The effects of deposition conditions on the crystal structure and microstructure of Ca-Ti-O films were investigated. The deposition temperatures (T dep ) were changed from 787 to 1187 K and the total…
The results of ab-initio calculation of frequency dependent linear polarizability α and first hyperpolarizability β of para-nitroaniline (p-NA) in the presence of different solvents are presented using polarizable continuum model (PCM). Geometry of p-NA in different solvents was optimized using HF/6-31 + G(d,p). Both…
The microscopic structures and the bonding properties of Y-doped and undoped (01 8)/[04 1]/180° (Σ37) grain boundaries in alumina are investigated by using ab initio method. The formation energy of grain boundary and the segregation energy of Y to grain boundary are acquired. Electronic structures, potential distribut…
The effect of electron-beam irradiation on the surface properties and the parameters of the semicrystalline structure of biaxially oriented poly(ethylene terephthalate) (PET) films was studied. It was shown that the crystallinity and the surface tension of the irradiated films at the interfaces with isooctane and wate…
Dy 3+ , Al 3+ codoping ZnNb 2 O 6 phosphors were synthesized by solid state reaction. The luminescence intensity of ZnNb 2 O 6 : x Dy 3+ (0.02⩽ x ⩽0.13) can be enhanced by codoping with Al 3+ under 365 nm excitation, but weakened under 254 nm excitation, because energy can be tranferred from CTS to the excitation stat…
Bur-like microspheres and microwires of CuS/pyridine composites were synthesized by a solvothermal method. The spheres or wires composed of a large number of nanoflakes with thickness of 10-20 nm and length of hundreds nanometers. Sub-nanostructures can be observed in the nanoflakes by the high-resolution transmission…
The influence of polyester/functional fibre blends on the drape properties of knitted fabrics for sport clothing application has been studied. Several knitted fabrics have been produced using polyester fibre blended, in different percentages, with functional fibres like Outlast, Dry release, Aquator, Polybutylene tere…
Pilocarpine is a natural substance with potential application in the treatment of several diseases. In this work Fourier Transform (FT)-Raman spectrum and the Fourier Transform infra red (FT-IR) spectrum of pilocarpine hydrochloride C11H17N2O2+.Cl- were investigated at 300 K. Vibrational wavenumber and wave vector hav…
The single electron transistor (SET) fabrication process on the individual single-walled carbon nanotubes (SWCNTs) using low energy Ar ion irradiation technique has been demonstrated. The individual SWCNT was partly irradiated through the protection resist with the two opening windows, whose width was 50 nm, fabricate…
Structure of fibrous chelate ion exchangers FIBAN X-1 and FIBAN X-2 prepared by a two-step synthesis was studied by IR Fourier spectroscopy. The first step of the ion exchanger preparation consists in the production of an aminated fiber (AF). The process can be carried out in different phases: either vapor, or aqueous…
Owing to the relevance of plasticized PVC in the industrial plastic transformation sector, mainly in such sectors as interior decoration (furniture, wood) toys, household goods, shoes, auxiliary sectors, etc., this material makes an interesting study subject from the perspective of quality improvement, benefits, and v…
We have performed the specific heat and the electrical resistivity measurements under high magnetic fields for Heusler compounds Ru 2 CrGe and Ru 2 CrSn. We found that the electrical resistivity for Ru 2 CrGe shows an upturn in the vicinity of 130 K and changes a metallic to a semiconducting-like behavior with decreas…
Raman scattering spectra of RbOs 2 O 6 and CsOs 2 O 6 have been measured from 4 K to 300 K. Among six Raman active modes, we focus on T 2g mode of alkaline atoms and E g mode of oxygen. Width of the T 2g mode becomes quite large in KOs 2 O 6 . This is caused by very lower-frequency fluctuation and a candidate of the f…
This work is the second part of an investigation dedicated to produce a Ni–Co nanostructured alloy. The route begins with the coprecipitation of the NiO–Co3O4 from dissociation of the respective nitrates followed by a hydrogen reduction of these oxides. Preliminary thermodynamic studies have been carried out in order…
The reaction of N,N,N′,N′-tetramethylmethanediamine with pheophorbide a methyl ester gave the corresponding 13″-dimethylaminomethyl derivative and 13-N,N-dimethylamide derivative of chlorin e 6 having a methyl acrylate moiety in the 15-position. Conditions were found for the synthesis of the latter both directly from…