Materials Literature
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This chapter discusses the underlying principles X-ray scattering by a distribution of electrons. The theory is then extended to the diffraction of X-rays by an infinite lattice of molecular motifs and the concept of the structure factor, which describes the diffraction pattern, is introduced. The theory of calculatin…
This chapter covers methods of structure solution which are used when molecular replacement is impossible, usually due to the lack of a suitable search model. These methods require that additional atoms are introduced into the protein, either by soaking the crystal or by special expression methods. These atoms are cho…
Background This study was undertaken to evaluate the influence of the expression of osteolytic cytokines induced by micrometer-diameter wear particles [titanium alloy (Ti-6Al-4 V) and ultra high molecular weight polyethylene (UHMWPE)]. Methods Filtration air was injected subcutaneously into rats' backs six times (3 ml…
It is an ongoing challenge to realize the use of selective gas-sensing devices in harsh environments where remote sensing is desirable, such as for monitoring toxic flare or fugitive gas emissions in off-shore settings. Zinc oxide, synthesized by a solid state chemical reaction technique, is a promising gas-sensing ma…
Polymer solar cells based on conjugated polymer/fullerene to form a bulk heterojunction have received considerable attention recently. In this study, we carry out systematic study on a promising material system employing poly [(2-methoxy-5-ethylhexyloxy)-1, 4-phenylenevinylene] (MEH-PPV) and [6,6]-phenyl-C61-butyric a…
T he new recruits of the Magazine who were added to the strength of the regiment in Mr Blackwood's last years were not many. But two at least whom we may pick out in the first place from the records of a very voluminous correspondence, and in the other from a few very careless and hurried letters, were after his own h…
Evitar o uso de materiais de construção tóxicos é um dos princípios da construção sustentável. Este artigo constituído por 3 partes discute vários casos de toxicidade de materiais de construção pela revisão da literatura nessa área. A parte 3 do presente artigo aborda os casos dos materiais plásticos, colas sintéticas…
Textile dermatitis results from exposure to a variety of agents, including dyes and fabric finishes. Patch testing with a specialized series of allergens is often used for diagnosis. To examine the results of patch testing with the textile components on a standard screening tray, and to compare them with the results o…
Abstract Thin protective zirconium oxide coatings prepared via sol-gel with zirconium propoxide and acetyl acetone (acac) or hydroxypropyl cellulose as stabilizers have been successfully deposited onto iron substrates at low temperature. Electrochemical current density vs. potential scans showed a reduction of the iro…
L’objectif de cette thèse est de développer un concept inédit permettant l’utilisation de silices mésoporeuses pour encapsuler des principes actifs cosmétiques de façon permanente, ce qui permet d’améliorer leur tolérance cutanée, d’optimiser leur stabilité à la lumière tout en préservant leur efficacité et de facilit…
Abstract Phospho‐L‐glutamic acid was successfully prepared by the phosphorylation of glutamic acid, and its adsorption on synthetic hydroxyapatite (HAP) was studied together with glutamic. The adsorption behaviors of both adsorbates were adequately described by a Langmuirian model. From the comparison between two diff…
Abstract Review: ca. 50 refs.
Platzwechsel mit Folgen: Experimentelle und computergestützte Analysen eines Peptid-Substrat-Hybridsystems ergaben, dass der Positionswechsel eines Prolinrests in synthetischen Peptiden deren Adsorptionseigenschaften auf Halbleitern deutlich und vorhersagbar ändert (im Bild für Si(100)-Oberflächen als Substrat gezeigt…
Abstract Review: 32 refs.
Chemistry Although many transition metals readily form stable complexes with multiple carbonyl (CO) groups, uranium carbonyls have proven to be exceptionally difficult to synthesize and characterize. Ricks et al. studied the coordination of CO to U+ and UO2+ cations generated in the gas phase by
The synthesis of simple single source molecular precursor based on metal alkoxides of the type,[(MMPEP)Al(μ-OBnCH2Cl)]2 (1),[(MMPEP-H)Li·(BnOH)]2 (2) and[(MMPEP-H)Li·(HOB-nCH2Cl)]2 (3) has been reported herein. Complex 1 was prepared by the reaction of[(MMPEP)Al(CH3)(Et2O)] with p-(chloromethyl)benzyl alcohol. The rea…
Abstract KCu3S2 is synthesized in the absence of any organic surfactant from a 3:2 mixture of elemental sulfur and CuCl2 in a 51.5:48.5 mixture of NaOH and KOH.
Abstract The phase transformations of La2Ni7 during hydrogenation are characterized by in situ XRD.
Stuck Li-ke glue: Oligo(ethylene oxide)-bridged bis(cyclodipeptides) exhibited remarkable enhancement of gelation ability by the addition of Li+ (see figure). By coordination of metal ions to the oligo(ethylene oxide) chain, terminal cyclodipeptides may move closer and more easily form the hydrogen-bonded-sheet struct…
Abstract Review: 44 refs.