Materials Literature
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Pharmaceutical blends consist of several components each with its own unique characteristics, with different size, shape, density, and particle-particle interactions. With so many degrees of complexity, prediction of segregation behavior becomes intractable. The objective of this study was to develop a segregation tes…
Wetting of hydrophobic polymer surfaces commonly employed in electronic coatings and their interaction with surfactant-laden liquids and aqueous polymer solutions are analyzed using a contact angle hysteresis (CAH) approach developed by Chibowski and co-workers. In addition, a number of low surface tension acrylic mon…
A synthetic route to 3′-O-alkyl nucleotides is described that provides easy access to a series of nucleotide-based amphiphiles. Physicochemical experiments demonstrate that these nucleotide amphiphiles possess different aggregating properties compared to both their non-nucleotide analogues and simple nucleotides. The…
Biomimetic strategies to control mineral nucleation include the development of self-assembled monolayers with appropriate structural properties. We present a bis-urea based surfactant with variable structural adaptability, which induces habit modification in calcite crystals under optimal conditions. In situ surface-s…
With the aim of further developing the structure-activity relationship in biologically active half-sandwich Ru(ii)-[9]aneS(3) complexes ([9]aneS(3)=1,4,7-trithiacyclononane), a series of new mono- and dinuclear complexes bearing the chelating dicarboxylate ligands oxalate (ox), malonate (mal) and methylmalonate (mmal)…
Detailed information on corrosion processes provides the key to effective prediction and minimization of corrosion damage. The initiation stage of material decomposition plays a special role, since the corrosion starts mainly on weakest locations, such as surface defects, grain boundaries, segregations or inclusions.…
In order to obtain materials with a tailored thermal expansion, in particular zero-thermal-expansion between -50~100°C, the possibility of preparation, thermal expansion behavior and phase transition of Al2-xMx(WO4)3 (M: Y, Ga and Sc) have been examined. Y was not substituted for the Al site in Al2(WO4)3. Al2-xGax(WO4…
A comparative study at the ambient temperature of the ferromagnetic resonance (FMR) spectra of Ni/ZnO and<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" id="E3"><mml:mrow><mml:mtext>Ni/</mml:mtext><mml:mi>γ</mml:mi></mml:mrow></mml:math>-<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" id="E4"><mml:mr…
Superelasticity of β Ti-16 at%Nb-4.8 at%Sn alloy consisting of non- (or minimal-) cytotoxic elements was investigated for biomedical applications as functions of deformation temperature and aging heat treatment after quenching. As-quenched Ti-16Nb-4.8Sn having Af (the reverse martensitic transformation finish temperat…
Effects of Mn on the localized corrosion, repassivation kinetics, and stress corrosion cracking (SCC) of high Mn–N stainless steels (SSs) were examined in chloride solutions and compared with those of type 304 SS. The resistance to pitting corrosion of high Mn–N SSs decreased with an increase in Mn content at the expe…
前報に続いて塑性変形が関与する水素脆性機構として水素助長空孔理論を紹介した．塑性変形に伴って生成する格子欠陥の検出法と，水素が空孔生成とその凝集を助長することを示した．機構モデルの裏づけとして鉄鋼の水素脆化感受性の組織依存性が塑性変形誘起空孔密度と対応すること，疲労損傷と遅れ破壊との相互作用を述べた．また，水素脆性と水素量との関係についての問題点，遅れ破壊試験中の欠陥の経時変化を指摘した．
Bacterial cellulose is a biopolysaccharide produced from the bacteria, Acetobacter xylinum . Static batch fermentations for bacterial cellulose production were studied in coconut and pineapple juices under 30 °C in 5–1 fermenters by using three Acetobacter strains: A. xylinum TISTR 998, A. xylinum TISTR 975, and A. xy…
Un materiau est constitue d’atomes repartis suivant un reseau cristallin. Des forces interatomiques maintiennent les atomes aux nœuds de ce reseau. Ces forces provoquent la cohesion des particules de matieres entre elles et ainsi permettent au solide de conserver a peu pres sa forme initiale lorsqu’il est soumis a plu…
Vibration and acoustic requirements are becoming increasingly important in the design of mechanical \nstructures. The need to vary the structural behaviour to solve noise and vibration problems occurs at design or \nprototype stage, giving rise to the so-called structural modification problem. Structural dynam…
We give a goal-oriented a posteriori error estimator for the atomistic-continuum modeling error in the quasicontinuum method, and we use this estimator to design an adaptive algorithm to compute a quantity of interest to a given tolerance by using a nearly minimal number of atomistic degrees of freedom. We present com…
By the first principles plane-wave pseudopotential calculations based on the density functional theory, we studied the equations of states and structural properties of transition metal compounds OsB2 and OsO2 and the possible high pressure phase transitions of OsO2. Three (rutile, pyrite and fluorite) phases of OsO2 a…
Anisotropy in the pair potential primarily governs the mesomorphic behaviour of the liquid crystalline molecules. The intermolecular interactions between a pair of HBT molecules have been evaluated using modified second order perturbation treatment along with multicentred-multipole expansion technique. An all valence…
The biotin-terminated PAMAM dendron has been synthesized and the asymmetric dendron used to modify the protein avidin via non-covalent bioconjugation.
One of the avenues for the development of the analytical applications of surface enhanced spectroscopy is the engineering of enhancing substrates that would be selective and target specific. In the present report, the proof of this concept is demonstrated using the layer-by-layer (LbL) technique to fabricate portable…
One major pathogenesis in degenerative disorders of the central nervous system (CNS), including Alzheimer's disease, Parkinson's disease, amyotrophic lateral sclerosis, and ischemia, is the oxidative stress induced by reactive oxygen species (ROS). The present study investigated the protective effect of colloidal silv…