Materials Literature
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AlCl 3 crystallizes as an ionic solid but melts to form a molecular liquid consisting of Al 2 Cl 6 units. In order to see if this transition involves a major change in electronic structure, the dimer and crystal of AlCl 3 are examined with the aid of generalized gradient corrected density functional theory (GGC-DFT) c…
A new hydride in the MgH2–YH3 system was found by using a high pressure of 5 GPa, and their crystal structure, thermal stability and hydrogen content were studied. The high-pressure synthesis was carried out at 1073 K for 2 h under 5 GPa by using an anvil-type apparatus. In the MgH2–xat%YH3 system (x=33–100), novel hy…
Expressions are presented for the analytical energy derivatives of the ligand field stabilisation energy (LFSE) within the angular overlap model formalism. In addition to the σ-bonding contributions already incorporated in the ligand field molecular mechanics (LFMM) code, explicit contributions from π-bonding and d–s…
The use of SiC/SiC composites for nuclear application has recently been considered because of intrinsic low activation and superior high temperature mechanical properties of SiC. The property of SiC fiber is a key issue in order to improve mechanical properties of SiC/SiC composites following irradiation. SiC/SiC comp…
Poly3-(4-fluorophenylthiophene), which can be both n- and p-doped, has been chemically synthesized by using as an oxidant and is used as an electrode-active material in composite electrodes. To fabricate an all-solid-state electrochemical capacitor, a liquid electrolyte solution was replaced by a gel polymer electroly…
The magnetic properties and their correlation with the microstructure and electrical transport are investigated in ${\mathrm{La}}_{0.88}{\mathrm{Sr}}_{0.1}{\mathrm{MnO}}_{3}$ films grown on $(100){\mathrm{SrTiO}}_{3}$ single crystal substrates with thickness ranging from 100 to 2500 \AA{}. The ultrathin film $(t=100 \…
In the present study, an attempt has been made to enhance the corrosion resistance of a Mg alloy (MEZ) by laser surface alloying with Al + Mn. Laser surface alloying has been carried out with a 10 kW continuous wave CO 2 laser by melting and simultaneous feeding of a powder mixture of Al and Mn in the ratio of 3 : 1 a…
The synthesis, x-ray crystal structures and magnetic susceptibilities for two tetrahalocuprate salts are reported. Bis(2-amino-5-nitropyridinium) tetrabromocuprate monohydrate [(5-NAP) 2 CuBr 4 ·H 2 O], 1 is triclinic, P-1. The tetrabromocuprate ions pack to form quasi-Heisenberg, S=½ quantum antiferromagnetic ladders…
In the cooling type batch crystallization, the influence of undersaturation operation on crystal size distribution was investigated, and the effectiveness of this operation was discussed. In batch crystallization with seeding, it was clear that undersaturation operations in the early stages of the cooling operation wa…
Full characterization of the crystal structures of the racemate, nonracemate (20% ee), and pure enantiomer of [2-[4-(3-ethoxy-2-hydroxypropoxy)phenylcarbamoyl]ethyl]trimethylammonium p-bromobenzenesulfonate (NBMe3), which has successfully shown an unusual enantiomeric resolution phenomenon, "preferential enrichment,"…
The hydriding/dehydriding characteristics, pressure-composition isotherms and X-ray diffractographs of Mg-rich Mg–Ni–Nd alloys fabricated by different solidifying processes (mold-casting, water-quenching, or melt-spinning) are compared and discussed in relation with their microstructures observed by SEM . Among them,…
Exceptionally large complexation constants for oxalate encapsulated within azacryptand hosts are partly explained by pi-stacking interactions between C=O and aromatic rings.
SUMMARIES A view on the kinetics of cellulose ageing is given, oriented particularly on the problem of stability and the degradation of paper, for which cellulose can be considered as a model compound. Reservations concerning the conditions of cellulose degradation are exposed, e.g. that the research efforts are focus…
Differently from magnetoelectric (ME) crystal families (e.g., Cr 2 O 3 and phosphates) to which the ME effect is intrinsic, multiferroic composites such as ferrite/piezoelectric ceramic composites exhibit extrinsic ME effect which is known as a "product property" resulted from the interaction between the ferrite and p…
In this study, we concentrated on improving the vortex flow uniformity, which was considered as a key factor for our new ICP torch design. To obtain a uniform vortex flow with lower plasma gas consumption, our new ICP torch had a dual gas inlet, and convertibility for helium and argon ICP. With this modification, heli…
Flax (Linum usitatissimum L., Linaceae), which has been grown throughout the world for millennia, is the source of products for existing, high-value markets in the textile, composites, paper/pulp, and industrial/ nutritional oil sectors (Hamilton 1986; Sharma and Van Sumere 1992b). Flax is the source of industrial fib…
The diametral expansion of pressure tubes in CANDU™ reactors due to irradiation creep and growth is an important property that may limit the useful life of the tubes. Measurements accumulated over many years have shown that there is considerable variability in diametral strain rates between tubes. There is also consid…
The new lower rim functionalised macrocycle 5,11,17,23,29,35-hexa-tert-butyl-37,38,39,40,41,42-hexakis(dimethylphosphinoylmethoxy)calix[6]arene (B6bL6) has been synthesised. Temperature dependent 1H and 31P NMR studies indicate a mixture of conformers with a time-averaged C6v symmetry at 405 K in dmso-d6; ΔG≠ values f…
The liposomal phase transition temperature was monitored in unstirred suspensions using a differential scanning calorimeter. The main and pre-transition temperatures under conditions of stirring were measured by the change in 90 degrees light scattering using a fluorescence spectrophotometer. Both methods show the sam…
Low-pressure hydrogen gas plasma reduction has been used at the Swiss National Museum in metals conservation since 1990. After a critical re-evaluation of the method in 1994, major changes were introduced. Today, it has become an integral part of the conservation procedures for archaeological iron. Its major advantage…