Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTBinding of methylmercury chloride to the model peptide, N-acetyl-L-cysteine. Proton magnetic resonance studyPaul G. Sumpson, Ted E. Hopkins, and Rizwanul HaqueCite this: J. Phys. Chem. 1973, 77, 19, 2282–2285Publication Date (Print):September 1, 1973Publication History Publi…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSolvent and cation dependence of the tetrahydroborate, BH4-, Raman spectrumA. E. Shirk and D. F. ShriverCite this: J. Am. Chem. Soc. 1973, 95, 18, 5901–5904Publication Date (Print):September 1, 1973Publication History Published online1 May 2002Published inissue 1 September 1…
The transmission spectrum of antiferromagnetic FeC${\mathrm{O}}_{3}$ has been investigated in the far-infrared region from 20 to 300 ${\mathrm{cm}}^{\ensuremath{-}1}$, for temperatures from 4.2 to 70 K and in applied fields up to 90 kOe. Spectra were obtained from natural single crystals and high-purity synthetic powd…
By using techniques developed by many workers to study streamer mechanism in air between metallic electrodes, the phenomena of partial discharges in insulating walls were studied. It is shown that the luminous evolution of partial discharges consisted of the development of a primary and a secondary streamer, for posit…
We have measured the fluorescent decay rates of the $^{3}P_{0}$ and $^{3}P_{1}$ states of the ${\mathrm{Pr}}^{3+}$ ion in Pr${\mathrm{Cl}}_{3}$ and La${\mathrm{Cl}}_{3}$ over a wide range of temperatures. At low temperatures the radiative lifetime of the $^{3}P_{0}$ state in La${\mathrm{Cl}}_{3}$:1-at.% Pr is 14.7 \if…
Abstract Metalation of diene polymers such as poly (butadiene) and poly(isoprene) with sec-butyllithium and tetramethylethylenediamine in cyclohexane at room temperature forms lithiated polydienes. Reaction of the polylithiodienes with styrene or α-methylstyrene forms graft copolymers. The extent of metalation is much…
Advances in diffraction grating ruling made in the past twenty-five years are reviewed, particularly demonstrating the application of interferometry and electronics to ruling engine control. Portions of this paper were presented at the Eighth Australian Spectroscopy Conference at Monash University in August 1971, unde…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTQuantun chain process in the sensitized cis-trans photoisomerization of 1,3-dienesJack. Saltiel, David E. Townsend, and Alan. SkyesCite this: J. Am. Chem. Soc. 1973, 95, 18, 5968–5973Publication Date (Print):September 1, 1973Publication History Published online1 May 2002Publ…
The preparation of nortropane N-oxyl (8-azabicyclo[3.2. 1]octane N-oxyl) and some homologs and derivatives is described. This radical oxidizes hydrogen peroxide and 2-propanol; labeling studies show that the bridgehead protons are not involved in these reactions. Nortropane N-oxyl dimerizes irreversibly in several sol…
Abstract The purpose of the work was to test existing theories of chain folded polymer crystallization over a supercooling range which is much is excess to what could be hitherto realized. This was made possible by the recognition that crystallization of isotactic polystyrene in solution could be conducted over an exc…
Abstract The magnetic transition from the ferro- to the para-magnetic state of manganese(II) phthalocyanine (C32H16N8Mn) has been observed by measurements of the magnetic susceptibility, the magnetization and the proton magnetic resonance in the low-temperature range. The positive Weiss constants were obtained from th…
The precipitates responsible for magnetic age hardening of a Co3.8Cu0.9Fe0.5Ce alloy have been directly observed by transmission electron microscopy. The precipitates are coherent, plate shaped disks which possess the rhombohedral Co17Ce2structure. They form in a [001] plate normal orientation and cluster in staggered…
The flashover performance of post-type support spacers for concentric compressed gas-insulated transmission lines was investigated. The experiments were made with SF6 gas at 4.4 atm. abs. and low frequency AC voltage in the EHV range. Nine cast epoxy spacers with metal inserts at each end shaped to produce different e…
Abstract The morphological character of uniaxially oriented poly(ethylene terephthalate) (PET) films was investigated as a function of draw ratio. Dynamic mechanical, infrared, and crystallite‐size measurements were made on the samples. In addition, selective degradation experiments and molecular weight determinations…
The modulation of guided optical waves has been accomplished using an integrated ferroelectric thin-film structure. LiTaO3 was rf sputtered onto 7059 glass in an argon-oxygen environment. Electrodes for applying the modulation signal were formed by chemically etching an interdigital pattern in gold which was rf sputte…
We have studied the ordering of Fe atoms and the magnetic properties of Th(Co1-xFex)5alloys with the CaCu5- type structure. From the neutron diffraction analysis it is concluded that the larger Fe atoms prefer to occupy the site3gwhereas the smaller Co prefer to occupy the site 2c. The ordering between Fe and Co in th…
Aggregates of polyethylene lamellae, whose average thickness can be increased progressively from about 200 to 2000 A and beyond have been produced by annealing drawn polymer hydrostatically. All lamellae share a common c axis orientation and have a surface free energy of 95 erg cm−2. The physical texture of the result…
SUMMARY A cluster analysis and a principal components analysis were performed to examine the degree to which the diatom flora of Yaquina estuary can be partitioned into discrete associations and to relate the composition of the flora to selected physical properties of the estuary. The species composition of the diatom…
Ultraviolet photosensitivity of the single-stranded forms of poly(A) and poly(dA) is compared. In contrast to poly(A), poly(dA) is rather sensitive to ultraviolet irradiation. Relatively low doses of ultraviolet light lead to characteristic changes of the ultraviolet and circular dichroism spectra of poly(dA), suggest…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMagnetic properties of low-symmetry d2 octahedral complexes. Synthesis and magnetic susceptibilities of some six-corrdinate tungsten(IV) halide complexesMargaret A. Schaefer King and R E. McCarleyCite this: Inorg. Chem. 1973, 12, 9, 1972–1979Publication Date (Print):Septembe…