Materials Literature
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The effects of dissolved impurities in simulated boiler water reactor (BWR) water on the intergranular stress corrosion cracking (IGSCC) of sensitized stainless steels (SSs) were studied by constant elongation rate tensile (CERT) tests with notched specimens. Impurities studied were sulfate, nitrate, chloride, and chl…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTUnidentate vs bidentate acyl coordination: reactions of high-spin iron(II) alkyls with carbon monoxide and the crystal structure of the bidentate acyl Fe(.eta.2-COC6H2Me3)Br(CO)(dippe)Ann R. Hermes and Gregory S. GirolamiCite this: Organometallics 1988, 7, 2, 394–401Publicat…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEffect of cross-links which occur during continuous chemical stress-relaxationKenneth T. GillenCite this: Macromolecules 1988, 21, 2, 442–446Publication Date (Print):February 1, 1988Publication History Published online1 May 2002Published inissue 1 February 1988https://pubs.a…
Abstract δ Valerolactone and ϵ‐caprolactone were reacted with BBr 3 , AIBr 3 , TiBr 4 , SnBr 4 or Bu 2 SnBr 2 in dichloromethane or chloroform in a 1 : 1 mole ratio. When these exothermic reactions were conducted with cooling, complexation of the lactones at the exocyclic oxygen was detectable by means of IR and 1 H N…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTElectron density studies of porphyrins and phthalocyanines. 7. Electronic ground state of bis(pyridine)(meso-tetraphenylporphinato)iron(II)Naiyin Li, Philip Coppens, and John LandrumCite this: Inorg. Chem. 1988, 27, 3, 482–488Publication Date (Print):February 1, 1988Publicat…
A study has been made of interfacial layers that form within cracks in mica and silicate glass. The layers are the result of interactions with environmental species behind the crack tip. Deposition processes are associated with precipitation from aqueous solutions and corrosion of the crack walls. The level of precipi…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTKinetics of the unfolding of collapsed polystyrene chains above the glass transition temperatureChun Yuan Liu and Herbert MorawetzCite this: Macromolecules 1988, 21, 2, 515–518Publication Date (Print):February 1, 1988Publication History Published online1 May 2002Published in…
Abstract The double bonds of natural rubber latex (stabilized by a nonionic surfactant) were reacted with an approximately equimolar amount of performic acid at room temperature with a limited amount of formic acid present. Product analysis by 1 H‐NMR during the course of the reaction showed that 69–90% epoxidation oc…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSilicon-functionalized silyl enol ethers. Part 2. Silyl enol ethers bearing stereogenic silicon atoms and chiral alkoxy groups: the effect of these groups upon the facial selectivity of the epoxidation of an enol double bondRobert D. Walkup and Nihal U. ObeyesekereCite this:…
Japanese nickel titanium (NiTi) alloy wire possesses excellent spring-back properties, shape memory and super-elasticity. In order to adapt this wire to clinical use, it is necessary to bend as well as to control its super-elastic force, and so a direct electric resistance heat treatment (DERHT) method was developed.…
Corrosion fatigue is considered to be one of the most important factors in determining the life of static offshore structures such as platforms for oil and gas production; the combination of corrosive environment and cyclic stress can produce failure of metals by the development and growth of cracks. Seawater provides…
Abstract The thermodynamic behavior of poly(bisphenol A carbonate) (PC) during uniaxial cold drawing and the properties of the drawn polymer were examined. Isothermal deformation calorimetric measurements were made during the drawing process. The deformation calorimeter measures heat, work, and internal energy changes…
Intracarotid artery infusions in animals are commonly performed in studies of the blood-brain barrier and in chemotherapy trials. Implicit in the analysis of these experiments is that the infusate will be distributed to the territory of the internal carotid artery in a manner that is proportional to blood flow. Fiftee…
The infrared-reflectivity spectra of ${\mathrm{KH}}_{2}$${\mathrm{PO}}_{4}$ (KDP) and its isomorphs ${\mathrm{RbH}}_{2}$${\mathrm{PO}}_{4}$ (RDP) and ${\mathrm{KH}}_{2}$${\mathrm{AsO}}_{4}$ (KDA) are reported in a wide spectral range (from 20 to 4000 ${\mathrm{cm}}^{\mathrm{\ensuremath{-}}1}$), in the paraelectric and…
Carbon-14 data on atmospheric CO2 as well as on plant material (tree leaves and wheat) from the vicinity of two German boiling water reactors (Philippsburg and Isar/Ohu) are reported. Atmospheric CO2 samples taken routinely with an integration time of one or two weeks 1.75 km downwind of the Philippsburg reactor (900…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEPR study of manganese(II) in two crystalline forms of bis(2,2'-bi-2-thiazoline)bis(thiocyanato)iron and the high-spin-low-spin transition that occurs in only one form. X-ray structure determination of both formsAndrzej Ozarowski, Bruce R. McGarvey, Anil B. Sarkar, and John…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHigh-resolution silicon-29 nuclear magnetic resonance in the Y-Si-O-N systemR. Dupree, M. H. Lewis, and M. E. SmithCite this: J. Am. Chem. Soc. 1988, 110, 4, 1083–1087Publication Date (Print):February 17, 1988Publication History Published online1 May 2002Published inissue 17…
The sp2 sites present in the various forms of amorphous carbon have been shown to form aromatic clusters whose size determines the width of the local band gap. A fluctuating band-edge model is developed to describe the effects of this clustering on the localization of states around the gap. It is shown how localized s…
In a posterior silk gland extract, covalently closed circular (ccc) DNA is in a superhelical state that supports more transcription of fibroin gene than does linear DNA. A HeLa cell extract showed neither the supercoiling activity nor the preference for the transcription of ccc DNA over linear DNA. These activities co…
Abstract This paper discusses the effect of varying cooling rates during crystallization on the spherulitic structure of poly(butalene terephthalate). Light microscopy, transmission electron microscopy, and differential scanning calorimetry were used to examine specimens. The mechanical properties of the polymers stud…