Materials Literature
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Stable nematic director fields of liquid crystals confined to cylindrical cavities which enforce homogeneous concentric anchoring depend on the competition between azimuthal and polar molecular anchoring strengths and the surface elastic constant ${\mathit{K}}_{24}$. Deuterium nuclear-magnetic-resonance line shapes of…
The soft potential model (an extension of the tunneling model to include soft localized vibrations) is shown to describe the anomalous features of the specific heat ${\mathit{C}}_{\mathit{P}}$ and the thermal conductivity of glasses over the entire low-temperature range, up to an including the peak in ${\mathit{C}}_{\…
Abstract Three‐ and four‐element mechanical analogues are commonly used to describe viscoelastic behavior in creep (deformation under constant force or stress) but not in stress relaxation (stress response after a suddenly imposed, constant strain). Mathematical models of the mechanical analogues in stress–relaxation…
Abstract Melt blends of ABS and PMMA were prepared using three types of ABS having different acrylonitrile (AN) content, and PMMAs with different MW. From TEM micrographs, it was found that ABSs containing 24 and 27 wt % AN were miscible, and the one containing 35 wt % AN was immiscible with PMMA. Morphologically misc…
Abstract The structures of various ordered, but non-periodic, systems have been investigated and exhibit features which can be directly described by means of a construction which the authors call the shift lattice, which is a simple generalization of the concept of the lattice. This paper is devoted to a description o…
Abstract Low‐density polyethylene (LDPE) films cografted with vinylene carbonate (VCA) and N ‐vinyl‐ N ‐methylacetamide (VIMA) were studied as a matrix for the immobilization of the enzyme alkaline phosphatase (ALP) either by direct fixation or by inserting spacers. When water‐soluble alkyldiamines such as diaminoethy…
Abstract Graft‐copolymerization of acrylamide (AAm) on poly(ethylene terephthalate) (PET) films using benzoyl peroxide (Bz 2 O 2 ) initiator has been studied. Four organic solvents, namely, pyridine (Py), 1,2‐dichloroethane (DCE), DEC/H 2 O (20/80, v/v), and dimethyl sulfoxide (DMSO), were used as swelling agents. DMS…
Abstract Melt rheological properties of the ternary blend of isotactic polypropylene (PP), styreneethylene–butylene–styrene terpolymer (SEBS), and polycarbonate (PC), PP/SEBS/PC, are studied in a wide range of composition, such that PP is the matrix and SEBS and PC are the minor components, with the proportion of one…
The theoretical yield of poly-D(-)-3-hydroxybutyrate (PHB) has been estimated from the biochemical pathway leading to PHB when a carbohydrate (glucose), a C(1) compound (methanol), a C(2) compound (acetic acid), or a C(4) compound (butyric acid) is used as a carbon source. In estimating the yield, recycling (or regene…
A method for preparing single-phase ingots of GeTe-rich solid solutions (x<or=0.20) in the system (GeTe) 1- x (AgBiTe 2 ) x is developed. The temperature dependence (77 to approximately=900 K) of the thermoelectric power is measured. The curves for GeTe and GeTe-rich solid solutions are of similar shape. Using convent…
The nucleation and growth of diamond on pretreated Si substrates were studied. The diamond films were produced by microwave plasma enhanced chemical vapor deposition (PECVD). The pretreatment consisted of an amorphous carbon film also deposited by microwave PECVD. The Si was previously scratched with 0.5 μm diamond pa…
Here we demonstrate that the phase separation of a binary mixture confined in a capillary is strongly affected by wetting phenomena for all the compositions. Near a symmetric composition, the hydrodynamics unique to a bicontinuous pattern leads to the extremely quick formation of a macroscopic wetting layer. Then this…
Geochemical characterization of organic matter and clay mineralogy of the Kimmeridgian of the Boulonnais (Northern France). Organic matter of Kimmeridgian formations of the Boulonnais is studied using Rock-Eval pyrolysis. The higher contents of organic matter are located in the Argiles de Châtillon and in the Argiles…
Five kinds of phases were detected in the liquidus phase diagram of the Fe-15%Cr-C-B alloy system. Two types of peritectic reactions {L+M2B→M3(C, B) and L+M7(C, B)3→M3(C, B)} and four types of eutectic reactions {L→γ+M2B, L→γ+M3(C, B), L→γ+M23(C, B)6, L→γ+M7(C, B)3} were also detected on each liquidus phase boundary.…
The paper presents the CC (Collect/Combine) Approach. It aims at enhancing speaking in language instruction. There is an emphasis on repetition of well-known linguistic material (texts, dialogues). This could be done in the form of chorus reading and individual "all-at-the-same-time" buzz reading to warming up at the…
Aromatic polyimides are of interest for integrated optics due to a combination of high thermal stability and easy processibility into planar structures. Polyimides can withstand chip attach and package assembly temperatures and are resistant to corrosive etchants and cleaning solvents making them compatible with a var…
Chemical reaction between SiC ceramics and Ni foil has been used for making grooves on the sliding face of SiC ceramics. The grooved face should be crack free, and then generation of cracks was already understood to be dependent on the size of deposited graphite in reaction product layer. To investigate the growth of…
As a means for improving the iron loss in grain oriented silicon steel sheets, a TiN ceramic film was formed by a CVD method on the polished silicon steel sheet. The following results were obtained.(1) The TiN ceramic film moderately increased the magnetic flux density B8 (T) of the silicon steel sheet by 0.009-0.012…
We employed the constant photo-conductivity method (CPM) to measure the optical absorption spectra of nano-crystalline siilicon films (nc-Si :H) in the energy range of 0. 9-2. 5eV. We analysed some possible major optical transition processes resulting from the photo-conductivity at different photon energy range and th…
To elucidate the effect of hardened depth on the fatigue strength of carbonitrided gears, gears with three kinds of hardened depths were fatigue-tested using a power circulating gear testing machine. In the case of gears with the shallowest and intermediate hardened depths, the failure mode was spalling. In the case o…