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Abstract Esterification rates of eight commonly occurring fatty acids were studied at 180C using equivalent and equimolar amounts of glycerol with and without a cosolvent. The esterification with equivalent amounts of glycerol without cosolvent followed second order kinetics and proceeded at a similar rate for all aci…
These papers describe electric circuit analogs for the 2-dimensional magnetic fields of synchronous machines. Although finite difference solutions of the differential equations are introduced to establish the mathematics, equivalent circuits are also deduced from elementary field and circuit theory familiar to electri…
Absorption and emission optical spectra are reported for Cm3+ in LaCl3 between 3000 and 8000 Å. These data are explained in terms of the Racah, spin—orbit, and configuration-interaction parameters: E0=4939.29 E1=4621.47, E2=17.70, E3=399.42, ζ=2841.66, α=57.08, β=−4761.60 cm−1, respectively. Crystal-field splitting of…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis and Vibrational Spectra of [Co(N3)4]2-,[Zn(N3)4]2-, and [Sn(N3)6]2-Denis Forster and William DeW. Horrocks Jr.Cite this: Inorg. Chem. 1966, 5, 9, 1510–1514Publication Date (Print):September 1, 1966Publication History Published online1 May 2002Published inissue 1 Se…
The elastic field of an edge dislocation is found in a simple manner by making use of the relation between an edge dislocation and a `wedge' dislocation made by inserting or removing a narrow wedge of material.
The ferromagnetic phase of MnAl alloy exists at a position slightly different from that of Mn:Al = 1:1 toward the Mn rich side. The single crystal of MnAl alloy was prepared by the horizontal type zone melting process. Domain patterns of that single crystal were observed microscopically with or without applying the ma…
Oscillation and amplification have been observed in a fiber in which the core is passive glass and the cladding is neodymium-doped glass. As in conventional fiber optics, the refractive index of the core is greater than that of the cladding, so that light is carried in the core by total internal reflection. The result…
ADVERTISEMENT RETURN TO ISSUEPREVArticleTreatise on Electrochemistry.R. H. StokesCite this: J. Am. Chem. Soc. 1966, 88, 18, 4310Publication Date (Print):September 1, 1966Publication History Published online1 May 2002Published inissue 1 September 1966https://pubs.acs.org/doi/10.1021/ja00970a071https://doi.org/10.1021/j…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe Direct Synthesis of Na3AlH6E. C. Ashby and P. KobetzCite this: Inorg. Chem. 1966, 5, 9, 1615–1617Publication Date (Print):September 1, 1966Publication History Published online1 May 2002Published inissue 1 September 1966https://pubs.acs.org/doi/10.1021/ic50043a034https://…
Experimental data on the physical solubility of gases in fused silica are presented. A “free” volume for fused silica was calculated from these solubilities and was compared to the free volume calculated by other methods. The relation of this free volume to the molecular structure of fused silica is also discussed.
Curie points, the temperature dependence of the high-field magnetization below room temperature, saturation moments, and densities are reported for the most iron-rich compounds in the rare earth-iron systems. The heavy rare earth compounds have the composition A2Fe14and the hexagonal Th2Ni17-type structure, while the…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe Crystal Structure of Neodymium TritellurideB. K. Norling and H. SteinfinkCite this: Inorg. Chem. 1966, 5, 9, 1488–1491Publication Date (Print):September 1, 1966Publication History Published online1 May 2002Published inissue 1 September 1966https://doi.org/10.1021/ic50043…
Characteristic flow properties for each of the three nominal mesophase types have been empirically established. Results are given for the nematic, smectic, and cholesteric types of mesophase. Discussion is centered on mesophases or liquid crystals exhibited by pure compounds within defined temperature intervals betwee…
The results of compressive strain-rate tests on 6061-T6 aluminum, 7075-T6 aluminum, 6Al-4V titanium fully annealed, pyrolytic graphite, lucite, and micarta for rates of loading of 10−3 to 104 in/in/sec are presented. A medium strain-rate machine and a split Hopkinson bar apparatus used to conduct these tests are descr…
Diffusion measurements in pure iron have been made in the temperature ranges 683 to 884°c and 1428 to 1521°c. The following expressions for diffusion coefficients, D, are deduced from least mean squares analyses of the results: A single Arrhenius equation describes the diffusion data obtained above the Curie temperatu…
The free radicals CH3, SiH3, GeH3, and SnH3 have been produced in a krypton matrix at 4.2°K by γ irradiation of the matrix containing dilute concentrations of CH4, SiH4, GeH4, and SnH4. The electron spin resonances indicate free or restricted rotation for all the radicals in the matrix. Observed anisotropies in g show…
Values for the physical solubility of nitrogen as well as for the content of chemically dissolved nitrogen in glass melts are given. The form in which the nitrogen is present in the glass melts is discussed and an attempt is made to explain chemical interaction between nitrogen and the glass melt. The dependence of th…
Abstract Soluble collagen from guinea pig skin has been subjected to sequential digestion with purified collagenase and trypsin. The small quantity of hexose present in the collagen can be detected in the digest largely as relatively basic glycopeptides. One of these glycopeptides has been obtained in pure form and ac…
Abstract The following model conception describing heat transfer in amorphous materials, especially in high polymers, is derived. An “elementary” thermal resistance is assigned to each bond between adjacent atoms. The thermal resistance of a macroscopic amorphous specimen is that of a three-dimensional network consist…
Abstract Considerable stress softening occurs in both gum and filler-loaded vulcanizates and when compared at the same stress the extent of softening is similar in both gum and filled vulcanizates. It thus appears that the softening process is mainly due to the rubber phase alone. Apparent differences between the stre…