Materials Literature
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To characterize the sericin components of the cocoon of silkworm Bombyx mori, fresh cocoon shells were dissolved in saturated aqueous lithium thiocyanate containing 2-mercaptoethanol, and fractionated by ethanol precipitation. Cocoon sericin was found to mainly consist of three polypeptides having molecular masses of…
Electrical conductivities of Gd-doped (0.15 mol %) and nominally pure nanocrystalline CeO 2 − x ceramics (∼30 nm grain size) were measured by impedance spectroscopy in the temperature range of 673-773 K under various oxygen partial pressures (1- 10 5 Pa). The ionic and electronic contributions were separated using ele…
With an objective to develop inexpensive electrode materials for electrochemical redox capacitors, nanocrystalline manganese oxides have been synthesized by reducing aqueous KMnO 4 solution with various reducing agents such as potassium borohydride, sodium dithionite, sodium hypophosphite, and hydrochloric acid under…
The low rigidity type titanium alloy, Ti–29Nb–13Ta–4.6Zr was designed, and then the practical level ingot of the alloy was successfully fabricated by Levicast method. The mechanical and biological compatibilities of the alloys were investigated in this study. The following results were obtained. The mechanical perform…
ABSTRACT: Chitosan films were prepared using 3 chitosan molecular weights and 4 organic acid solvents without plasticizer. Tensile strength (TS) and elongation (E) ranged from 6.7 to 150.2 MPa, and from 4.1 to 117.8%, respectively. Water vapor permeability (WVP) and oxygen permeability (OP) ranged from 0.3 to 0.7 ng‐m…
This updated version of Practical Sonochemistry for advanced students and teachers in chemistry and chemical engineering conveys the increasing growth in applications and equipment to power ultrasound. Equipment now on the market offers a wider range of frequencies with more reproducible experimentation and a variety…
Fundamentals and applications of ultrasound emulsification are reviewed. The importance of cavitation is stressed, as also is power input to the multiphase fluid. The influence of surfactants, polymeric stabilizers, temperature, pressure, and ultrasonic parameters such as frequency, residence time, acoustic intensity,…
The alkali activation of metakaolin (MK) leads to the production of high‐mechanical‐performance network‐structure materials. Adding calcium hydroxide (Ca(OH) 2 ) to the raw MK produces a somewhat different reaction: a network structure and C‐S‐H gel form. In the present study, MK and (MK + Ca(OH) 2 ) mixes were activa…
We have examined the use of Cu-Ni alloys as anodes for the direct oxidation of methane in solid-oxide fuel cells (SOFC) at 1073 K. Ceramic-metal (cermet) composites having alloy compositions of 0, 10, 20, 50 and 100% Ni were exposed to dry methane at 1073 K for 1.5 h to demonstrate that carbon formation is greatly sup…
thin film electrodes were prepared for use in a supercapacitor by electrochemical precipitation of films followed by heat-treatment. The effect of electrodeposition conditions such as cathodic current density and concentration of solution on the surface morphology of were examined and found to have a significant effec…
This article mainly deals with the recent serendipity of novel porphyrin analogs such as N-confused porphyrin. The unique property of this ligand allows the formation of a variety of metal complexes. The important aspect of dynamic flipping (inversion), induced either by confusion or expansion of the macrocyclic core,…
This book explains the fundamentals of high temperature corrosion and oxidation. It will enable engineers and other technical personnel to understand: How quickly different metals react with different environments at high temperatures; The mechanisms of these reactions; The corrosivity of different environments; How t…
Using alkyl phosphates and a cyclophosphazene as cosolvents, the possibility of formulating a nonflammable electrolyte for lithium-ion batteries was explored. The emphasis was placed on determining the impact of these flame-retarding additives on the performance of the electrolyte. It was found that although the cosol…
Series Preface. Preface to Volume 2. 1. Introduction. 1.1 Scope and definitions. 1.2 Nomenclature. 1.3 Historical background. 1.4 Introduction to catalysis by polyoxometalates. References. 2. Properties of Polyoxometalates. 2.1 Structures of polyoxometalates. 2.2 Crystal structure of heteropoly compounds. 2.3 Thermal…
Automation and data processing are discussed, followed by a description of a software package ``XIA-DPA'' for automated data processing & analysis.
Photochromic reactivity of diarylethenes in the single-crystalline phase was found to be controlled by the distance between the reactive carbon atoms in the antiparallel conformation.
The density of sputtered Ge2Sb2.04Te4.74 thin films upon annealing has been precisely determined by x-ray reflection and compared to the values determined from x-ray diffraction (XRD) data. The film density increases in two steps around 130 and 280 °C upon annealing up to 400 °C. These increases are consequences of ph…
Shape- and dopant-controlled magnetic semiconductor nanocrystals have been achieved by the thermolysis of nonpyrophoric and less reactive single molecular precursors under a monosurfactant system. Reaction parameters governing both the intrinsic crystalline phase and the growth regime (kinetic vs thermodynamic) are fo…
Experiments were conducted to study the temporal evolution of feldspar crystallization kinetics during isothermal decompression. Pinatubo dacite was held at 780°C, 220 MPa, f O2 = NNO + 2, H 2 O‐saturated conditions for an equilibration period, decompressed to final pressures, P f , ranging from 175 to 5 MPa, and then…
Reversible addition fragmentation chain transfer (RAFT) has been used to synthesize polymer brushes. Styrene, methyl methacrylate, and N, N -dimethylacrylamide brushes were prepared under RAFT conditions using silicate surfaces that were modified with surface-immobilized azo initiators. Films with controlled thickness…