Materials Literature
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A Fabry-Perot-type interferometer is described that permits the concurrent measurement of the coefficient of thermal expansion (alpha) and the thermooptic coefficient (dn/dT) of transparent materials. Measurements of the a and the dn/dT of vitreous silica and a heavy-metal fluoride glass show that the technique is acc…
The fate of the alpha-hydrogen of mandelate in the reaction catalyzed by mandelate racemase has been investigated by a mass spectroscopic method. The method entails the incubation of (R)- or (S)-[alpha-1H]mandelate in buffered D2O to a low extent of turnover (about 5-8%), esterification of the resulting mixture of man…
In a study of yam strength translation into woven fabric behavior, experiments were conducted to establish the effect of test gauge length on yarn properties. Yams produced on each of the three major spinning systems were tensile tested at varying gauge lengths. Yam strength data were fit to two-parameter Weibull dist…
Systemic administration of luteinizing hormone-releasing hormone (LHRH) in rats has been found to influence behavior independently of pituitary or ovarian function. A previous study has shown that LHRH can cross the blood-brain barrier in one direction, but it was not known whether this was due to a saturable transpor…
Charge‐discharge characteristics of electrochemically prepared V 2 O 5 ( e ‐ V 2 O 5 ) was studied as a cathode active material for lithium secondary batteries compared to cyrstalline V 2 O 5 ( c ‐ V 2 O 5 ) and amorphous V 2 O 5 ‐ P 2 O 5 ( a ‐ V 2 O 5 ‐ P 2 O 5 ) (1, 2). The e ‐ V 2 O 5 showed similar behavior to a…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTOrdered structures of block polymer/homopolymer mixtures. 3. Temperature dependenceHideaki Tanaka and Takeji HashimotoCite this: Macromolecules 1991, 24, 20, 5713–5720Publication Date (Print):September 1, 1991Publication History Published online1 May 2002Published inissue 1…
The structural properties of Sn at normal and high pressures are investigated using a self-consistent ab initio pseudopotential method. The structural stability of various phases including \ensuremath{\alpha}-Sn, \ensuremath{\beta}-Sn, simple hexagonal (sh), hexagonal close packed (hcp), body-centered tetragonal (bct)…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTExcited-state acid-base chemistry of (.alpha.-diimine)cyanotricarbonylrhenium(I) complexesR. M. Leasure, LouAnn Sacksteder, D. Nesselrodt, G. A. Reitz, J. N. Demas, and B. A. DeGraffCite this: Inorg. Chem. 1991, 30, 19, 3722–3728Publication Date (Print):September 18, 1991Pub…
Abstract— Recent observations of fatigue cracks bridged by continuous fibers in titanium alloy and titanium aluminide composites are compared to analogous observations in fiber‐reinforced ceramics under monotonic loading. Three failure modes have been identified under axial loading in each case: longitudinal failure (…
The single human tyrosine hydroxylase (TH) gene generates four different mRNA species through alternative splicing events. TH-1 and TH-2 mRNAs are expressed mostly in the brain. We have produced large amounts of the corresponding proteins in Escherichia coli to analyze their respective molecular characteristics. The p…
We investigate the texture which appears as parallel stripes perpendicular to the smectic layers in SSFLC cells. When the temperature approaches the smectic A to smectic C* transition from above in the smectic A phase, a DC field induces the chevron structure due to the electroclinic effect and then the stripe texture…
A series of polymers, bisphenol A-based poly(phosphoesters), were evaluated as degradable biomaterials. Degradation was observed for the four polymers studied under both in vitro and in vivo conditions. The rate of degradation was affected by polymer side-chain structure and correlated with the swelling behavior. The…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPicosecond and nanosecond studies of the photoreduction of benzophenone by N,N-diethylaniline and triethylamineC. Devadoss and Richard W. FessendenCite this: J. Phys. Chem. 1991, 95, 19, 7253–7260Publication Date (Print):September 1, 1991Publication History Published online1…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTQSAR (quantitative structure-activity relationship) studies on local anestheticsS. P. GuptaCite this: Chem. Rev. 1991, 91, 6, 1109–1119Publication Date (Print):September 1, 1991Publication History Published online1 May 2002Published inissue 1 September 1991https://pubs.acs.o…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTImpact improvement mechanism of HIPS with bimodal distribution of rubber particle sizeY. Okamoto, H. Miyagi, M. Kakugo, and K. TakahashiCite this: Macromolecules 1991, 24, 20, 5639–5644Publication Date (Print):September 1, 1991Publication History Published online1 May 2002Pu…
Tungsten trioxide is being developed as a electrochromic material for smart windows. However, the relatively high electrical resistivity and overpotential for hydrogen evolution and oxidation affect their response time and electrical power consumption. Previous work on indicated that admixing of Pt onto significantly…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTOrganic/inorganic-molecular beam epitaxy: formation of an ordered phthalocyanine/tin(IV) sulfide heterojunctionK. W. Nebesny, G. E. Collins, P. A. Lee, Lai Kwan Chau, Jamie Danziger, Elizabeth Osburn, and N. R. ArmstrongCite this: Chem. Mater. 1991, 3, 5, 829–838Publication…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStretching polymer brushes in poor solventsA. Halperin and E. B. ZhulinaCite this: Macromolecules 1991, 24, 19, 5393–5397Publication Date (Print):September 1, 1991Publication History Published online1 May 2002Published inissue 1 September 1991https://pubs.acs.org/doi/10.1021…
Abstract High density polyethylene (HDPE) was reinforced with 0‐40 wt% of wood flour (aspen). The effects of: stearic acid, mineral oil, maleated polyethylene wax, and sodium silicate on the tensile and impact strength of the composite were studied. The comparison of tensile properties of the composites showed that th…
Pt-Ti alloy films were studied for use as a lower electrode of the ferroelectric lead zirconate titanate (PZT) thin film capacitor. Pt-Ti alloy films with different Ti/Pt atomic ratios were first prepared by rf sputtering. Subsequently, PZT thin films were deposited also by rf magnetron sputtering on the Pt-Ti alloy m…