Materials Literature
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gamma-Irradiation was used to produce free-standing sterilized edible films based on caseinate. The effects of calcium ions (Ca(2+)) and two plasticizers, namely propylene glycol (PG) and triethylene glycol (TEG), were investigated, as was the effect of the irradiation on both the gel formation and mechanical properti…
Two new sampling and analysis techniques for assessing the condition of EPDM (ethylene-propylene diene monomer) composite insulators are presented. Polymer oxidation is assessed by removing small amounts of surface polymer by swabbing with xylene and analyzing this material by FTIR (Fourier transform infrared) emissio…
The cation radical states of novel TTF vinylogues with o-substituted phenyl groups at the vinyl positions are thermodynamically stable, and X-ray analyses of the cation radical salts have revealed the planar structures of the TTF vinylogue parts and unique crystal structures.
Calix[4]resorcinarenes are phenolic macrocyclic compounds, and readily available from resorcinols and aldehydes. We were interested in calix[4]resorcinarenes as highly functionalized core molecules for the rapid synthesis of dendrimers because of their ease of synthesis and because they are less affected by steric con…
The critical molecular structure change from columnar to lamellar mesophases in bis(diphenylglyoximato)nickel(ii)-based complexes has been investigated. When the number of the long chains surrounding the core complex part was reduced from eight to four, the mesophase changes its structure from columnar Colhd to novel…
Computational methods based on the density functional theory have been employed in the search for new ferromagnetic molecules and several compounds are predicted to exhibit stronger ferromagnetic coupling than the known hydroxo-bridged complexes, especially remarkable is the very strong coupling predicted for oxo-brid…
The molecular chaperone ClpX of Escherichia coli plays two distinct functions for bacteriophage Mu DNA replication by transposition. As specificity component of a chaperone-linked protease, it recognizes the Mu immunity repressor for degradation by the peptidase component ClpP, thus derepressing Mu transposition funct…
Conoscopic studies reveal that the nematic phase of 4,4-(p-terphenyl)-bis\[2,3,4-tri(dodecyloxy)benzal]imine is biaxial, the biaxial angle increasing with schlieren textures exhibited by the nematic phase have been between glass plates, as well as free-standing consisting entirely of s or 2-brush disclinations, confir…
Crystals of E. coli cytochrome b1, alias bacterioferritin, were grown fr om a low ionic strength solution. The resulting monoclniic P21 structure was solved by molecular replacement and refined using noncrystallographi c symmetries applied to the fundamental unit, consisting of two protein subunits and a single haem.…
Two new chromium(III)-containing complexes of formula AsPh4[Cr(bipy)(ox)2]·H2O 1 and [NaCr(bipy)(ox)2(H2O)]· 2H2O 2 (bipy = 2,2′-bipyridine and ox = oxalate dianion) have been synthesized and characterized by single-crystal X-ray diffraction. The structure of 1 consists of discrete [Cr(bipy)(ox)2]– mononuclear anions,…
The analogy with the liquid-gas critical point is analyzed to clarify the nature of the pretransitional behavior of physical properties in the vicinity of the Blue-Phase-III--isotropic transition in chiral liquid crystalline systems. The analogy is unusual: temperature serves as the ordering field and entropy plays th…
The states and roles of vanadium of 11-molybdo-1-vanadophosphoric acid (H4PMo11VO40, PMo11V) catalyst in the partial oxidation of isobutane (2-methylpropane) were analysed by EPR, 51V and 31P NMR, IR spectroscopy, and redox titration, and compared with dodecamolybdophosphoric acid (H3PMo12O40, PMo12) catalyst. Thermal…
The effect of alkaline hydrolysis on several surface properties of poly(hydroxybutyrate-hydroxyvalerate) (92/8) (PHB/HV) and poly(epsilon-caprolactone) (PCL) films and of poly(ethylene terephtalate) (PET) track-etched membranes have been characterized, as well as the adsorption of three proteins normally encountered b…
Amorphous tin-doped indium oxide (ITO) was deposited to a thickness of 110 nm on 〈100〉-oriented Si substrates at ∼40–60 °C by dc-magnetron sputtering under a total Ar pressure of 2 Pa. The kinetics of crystallization of the a-ITO films in flowing N2 were investigated by in situ time-resolved reflectivity. The microstr…
1. The basis of the method 2. The method step by step 3. The method illustrated by edxamples 4. Further topics Appendix (Answers to problems)
The introduction of long-circulating liposomes sterically stabilized by surface coating with polyethylene glycol has expanded the potential for drug targeting to tumors. In recent clinical studies, evidence of significant antitumor activity has been obtained with the industrially prepared formulation of long-circulati…
Electrostatic interaction is introduced between the host and guest in the synthesis of faujasite-Y confined metallotetrakis(N,N,N-trimethylanilinium) porphyrin cations (MTMAnP4+); the synthesized composites display high catalytic activity in the oxidation of cyclohexene.
Photosensitive copper phthalocyanine-(CuPc) doped silica mesoporous materials (in powder) have been directly synthesized by a self-organizing coassembly process using a functional surfactant, 11-ferrocenyltrimethylundecylammonium (ferrocenyl TMA) molecules. This simple method shows that it is not necessary to dope mol…
A new method of measuring the layer charge of smectites by IR spectroscopy is proposed based on the integrated intensity measurement of the band assigned to the ammonium fundamental upsilon 4 mode of NH (super +) 4 -exchanged clays. Measurements are made before and after Li fixation (Hofman & Klemen effect). These all…
An analysis of the urea method as a way to synthesize uniform colloidal particles is presented. Various selected cases of precipitation and coprecipitation are reviewed to illustrate the inherent complexities of the method. The importance of the kinetics of urea hydrolysis is recognized. The concept of trajectory is u…