Materials Literature
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Our early model for predicting nonwoven fabric stress-strain behavior by the finite element method is generalized to include the effects of fiber curl, which is shown to have a great effect on the tensile behavior of the fabric. A numerical method to characterize the lateral contraction of nonwovens during tensile def…
Two “self-complexing” macrocycles (22ab and 23ab) based on a methylthio-substituted derivative of the electron donor tetrathiafulvalene (TTF) and a cyclic bipyridinium acceptor have been prepared.[1] When “decomplexed” by fractional crystallization, the rigid compound 22b was not able to undergo “recomplexation” to an…
In a medium without serum, the initial adhesion of L1210 cells to nonsulfonated and sulfonated polymer surfaces was investigated. In the case of sulfonated polymer surfaces, the relative number of adhering cells strongly increases with an increase of the interfacial surface tension; that is, adhesion strongly depends…
Abstract The injection moldings of isotactic polypropylenes with various molecular weights were simulated using finite difference method. In the simulations, the unified crystallization model proposed in our previous paper was applied. The prediction of crystallinity and microstructure development in the moldings was…
Ultrastructural variation in valve morphology between members of Navicula “sensu stricto” is reviewed. Central and polar external raphe fissure paths, internal raphe features, the type and arrangement of the areolae, and girdle band morphology are documented and compared with these features in the generitype, Navicula…
We observe nonmetallic electronic states above the Fermi level in single-walled carbon nanotubes by measuring the energy distribution of thermal-field-emitted electrons. This measurement method examines electronic states associated with the nanotube cap or end termination, and with it, we resolve electronic states gre…
Both the large linewidth of optical transitions as well as the sizeable “Stokes” shift seem to suggest strong localization effects in nitride quantum wells. In contrast, we clearly show that the “Stokes” shift can be easily understood in terms of the huge piezoelectric fields present in such structures. At the same ti…
The Gilmore formulation for bubble dynamics coupled with zeroth-order gas diffusion were used to investigate theoretically the cavitation activity produced by a modified XL-1 lithotripter [J. Acoust. Soc. Am. 105, 1997-2009 (1999)]. The model calculation confirms many of the basic features in bubble dynamics observed…
The tetratricopeptide repeat (TPR) motif is a protein-protein interaction module found in multiple copies in a number of functionally different proteins that facilitates specific interactions with a partner protein(s). Three-dimensional structural data have shown that a TPR motif contains two antiparallel α-helices su…
A quantitative model for pore growth during initial‐stage sintering is proposed. During initial‐stage sintering, neck formation leads to surface rounding of the pores, thereby causing a decrease in the surface area of the system. The decrease in surface area, without a concomitant decrease in pore volume, leads to a s…
The sensitization of ethane oxidation by NO above 800 K and the oxidation of HCN-natural gas blend (CH4-C2H6, 10:1) mixtures at 1050 to 1450 K, with and without NO, have been studied in a fused silica jet-stirred reactor (JSR) at 1 atm. A detailed chemical kinetic model developed for NO-reburning by natural gas (754 r…
N-(2-Hydroxypropyl)methacrylamide (HPMA) copolymer-adriamycin (ADR) conjugate (P-aconityl-ADR) was synthesized by the attachment of cis-aconityl-ADR to an HPMA copolymer precursor using 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide (EDC) as the condensing agent. The ADR release from the HPMA copolymer conjugate was pH…
The extent to which calcium carbonate deposition in an anaerobic reactor can be reduced by adding inhibitors (phosphate and iron) of calcium carbonate crystal growth was investigated. At several concentrations of the additive, the extent of precipitation was assessed in continuous experiments with laboratory-scale rea…
The Streptomyces lividans KcsA potassium channel, a homotetramer of 17.6 kDa subunits, was found to contain two nonproteinaceous polymers, namely, poly-(R)-3-hydroxybutyrate (PHB) and inorganic polyphosphate (polyP). PHB and polyP are ubiquitous cellular constituents with a demonstrated capacity for cation selection a…
A working group composed of 30 scientists representing 12 countries and three international organisations have prepared a comprehensive status and assessment report on the Partitioning and Transmutation (P and T) of actinides and fission products in the frame work of an advanced fuel cycle option and as an alternative…
The ${}^{29}\mathrm{Si}$ magic angle spinning NMR spectrum of ${\mathrm{Na}}_{8}{\mathrm{Si}}_{46}$ exhibits three resonances with large positive Knight shifts assigned to the inequivalent $(16i,$ $6c,$ and $24k)$ Si sites in the structure. The integrated intensities are in the ratio $[15.7\ifmmode\pm\else\textpm\fi{}…
IMPACT is the name of a program and of specific simulation software, which will perform full-scope and detailed calculations of various phenomena in a nuclear power plant for a wide range of event scenarios. The four years of the IMPACT project Phase 1 have been completed, and each analysis module of the prototype ver…
Metal-doped diamond-like carbon films were produced for the purpose of an electrochemical nanoelectrode. In this study we use Z-contrast scanning transmission electron microscopy to directly observe metal cluster formation and distributions within the chromium-doped carbon films. At low doping (∼6 at. % Cr), Cr is uni…
We report magnetization and electron-spin-resonance (ESR) measurements around the Curie temperature on single-crystal and ceramic colossal magnetoresistance manganites. The temperature dependence of the ESR linewidth below $\ensuremath{\approx}{1.1T}_{C}$ is well described in terms of a two-magnon scattering relaxatio…
Results of the idealized mode-coupling theory for the structural relaxation in suspensions of hard-sphere colloidal particles are presented and discussed with regard to recent light scattering experiments. The structural relaxation becomes nondiffusive for long times, contrary to the expectation based on the de Gennes…