Materials Literature
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The use of pyridine-2-amidoxime in reaction with NiCl2.6H2O in the presence of NaOMe has led to a cationic NiII 12 cluster with novel structural features; each cluster molecule is a ferromagnet with a spin ground state of S = 6 arising from ferromagnetic exchange between the six octahedral NiII ions, but with intercat…
The present study investigated the amylose content and the gelatinization properties of various potato starches extracted from different potato cultivars. These potato starches were used to prepare edible films. Physical and mechanical properties of the films were investigated. The crystallinity of selected native sta…
Doped ice V samples made from solutions containing 0.01 M HCl (DCl), HF (DF), or KOH (KOD) in H(2)O (D(2)O) were slow-cooled from 250 to 77 K at 0.5 GPa. The effect of the dopant on the hydrogen disorder --> order transition and formation of hydrogen ordered ice XIII was studied by differential scanning calorimetry (D…
Shape memory is extremely useful in minimally-invasive deployment of medical devices, particularly stents used in the cardiovascular system. Current stents employ Nitinol, which exhibits shape memory on the basis of a phase transformation. Cross-linked polymers may also be made to exhibit shape-memory effects, but are…
SUMMARY: Currently implanted prosthetic heart valves, both mechanical or biological ones, are used to restore the proper blood hemodynamics when the native valves fail. However, these medical devices are not free from drawbacks, such as hemolysis or calcification, also presenting the relevant disadvantage of being una…
ABSTRACT: The alternate current (ac) electrical conductivity of poly(vinyl alcohol)-polypyrrole-ferric chloride (PVA-PPy-FeCl3) composite films has been investigated at different temperatures at a frequency ranging from 20 Hz to 1 MHz. The electrical conductivity of the composite increased with increasing temperature…
Glass sponges, as examples of natural biocomposites, inspire investigations aiming at both a better understanding of biomineralization mechanisms and novel developments in the synthesis of nanostructured biomimetic materials. Different representatives of marine glass sponges of the class Hexactinellida (Porifera) are…
This paper reports a simple, inexpensive, and efficient synthetic route to -based yellow phosphors for white light-emitting diodes. Through direct gas reduction and nitridation of the homogeneous oxide precursor of , fine phosphors were obtained by one-step firing at for 4 h in the flowing and mixture gas. The depende…
We have identified a pair of structurally similar iron complexes in the oxidation state II that exist in a low-spin and a high-spin electronic spin state in aqueous media, respectively. The low-spin, diamagnetic complex (LS, 1) is mute in MRI while the high-spin, paramagnetic complex (HS, 2) generates considerable con…
The aim of this study was to characterize synthetic poly-(L-lactic acid) (PLLA) nanofibers concerning their ability to promote growth and osteogenic differentiation of stem cells in vitro, as well as to test their suitability as a carrier system for growth factors. Fiber matrices composed of PLLA or BMP-2-incorporated…
Low levels of cobalt doping (1 wt%) of copper manganese oxide enhances its activity for carbon monoxide oxidation under ambient conditions and the doped catalyst can display higher activity than current commercial catalysts.
Silver nanoparticles within the pore channels of selectively grafted mesoporous silica SBA‐15 were synthesized. Silanols on the external surface of as‐SBA‐15 were first capped by – groups. After removal of the template of capped SBA‐15 by calcination, silanols on the internal surface of SBA‐15 were modified by 3‐amino…
Small particles adsorbed to gas-liquid interfaces are widely observed and utilized in many products and various industrial sections, such as flotation, washing, food, water treatment, treatment of radioactive wastes, and distillation in the petroleum industry. After a dormant period of nearly half a century, there is…
Four new diacid amides of dicholesteryl L-phenylalaninate were designed and prepared. The compounds with spacers containing three, four, five, or six carbon atoms are denoted as 1–4, respectively. Gelation tests showed that the four compounds are versatile organogelators, and a subtle change in the length of the space…
To investigate anti-inflammatory effects of carotenoids from Halocynthia roretzi, gene expression levels were measured for pro-inflammatory cytokines and enzymes in the murine macrophage-like cell line, RAW264.7, stimulated with lipopolysaccharide (LPS). All-trans alloxanthin, all-trans diatoxanthin, and their 9-cis i…
This study provides further tests of the validity of the triple network structure of the body-centred Imm (I) cubic phase in polycatenar (phasmidic) liquid crystals, proposed by Zeng et al., Nat. Mater., 2005, 4, 562. New hemiphasmid compounds were synthesised, two of which (6 and 7) display the above phase, while 8 s…
The attachment of CMC to pulp is known to have a strong impact on the tensile strength properties. The mechanisms behind the strength-enhancing ability of the CMC have been investigated by studying the effect of surface carboxymethylation on some basic fibre and sheet properties. Standard methods were used for the str…
A series of ionic bis(pyrazole)-silver(I) and -gold(I) complexes [ML(2)][A] (M = Ag, Au; A = BF(4)(-), PF(6)(-), NO(3)(-)), prepared by coordination of the mesomorphic L = Hpz(2R(n)) or non-mesomorphic L = Hpz(R(n)) pyrazole ligands (Hpz(2R(n)) = 3,5-bis(4-alkyloxyphenyl)pyrazole; Hpz(R(n)) = 3-(4-alkyloxyphenyl)pyraz…
We successfully developed an elasticoluminescent (EML) material with water resistance, (CASE). The crystal structure, photoluminescence (PL), and EML properties were characterized for both CASE and the typical EML material (SAOE). Contrary to SAOE, CASE showed superior water resistance property. No changes were found…
A model for tunable thin film bulk acoustic resonators (TFBARs) based on ferroelectric films is proposed. The model is based on electromechanical equations taking into account piezoelectric effect and electrostriction effect induced by the dc electric field. The dc field induced shift of the resonant frequency is expl…