Materials Literature
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The characterization of several isolates of a new lactic acid bacterium which produces a malty aroma is presented. Strains MX5R, MX5S, 674S, and 628S were asporogenous, catalase-negative, gram-positive, aciduric rods of varying length which did not reduce nitrate. The above strains also formed L(+)-lactic acid, produc…
A model is developed to describe the kinetics of swelling in nuclear fuels during irradiation, when tunnels formed along grain edges by the coalescence of fission gas bubbles interlink with one another to form a network through which the entrained gas can escape to the surroundings. The predicted dependence of swellin…
The sinking rates of living and heat‐killed cells of Asterionella formosa and Tabellaria flocculosa and after treatment with CuSO 4 , NaHClO 3 , Formalin, Lugol’s solution, butanol, and isopropanol at 15°C are reported. Dead cells sank faster than living cells, particularly those of Tabellaria. Some interspecific diff…
High-pressure studies to 150 kbar have been made on four orthoferrites, on Ni${\mathrm{Fe}}_{2}$${\mathrm{O}}_{4}$, and on ${\mathrm{Fe}}_{3}$${\mathrm{O}}_{4}$ using M\"ossbauer resonance. For the last two compounds data were obtained at both 22 and 147 \ifmmode^\circ\else\textdegree\fi{}C. The major features observe…
Values of the first four ionization potentials of the lanthanides (Z=57–71) and of Hf have been compiled. All except the value for neutral Hf are based on spectroscopic data. The spectroscopic designations of the ground levels of the neutral through triply ionized atoms (Z=57–72) are also tabulated. A similar compilat…
Monte Carlo simulation procedure is developed for kilovolt electron beam scattering and energy loss in targets consisting of thin films on thick substrates. Such calculations have direct application to the nondestructive quantitative chemical analysis of ultra-thin films in the electron microprobe (an electron probe x…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTNonstoichiometric compositions of cobaltous oxideJae Shi. Choi and Chul Hyun. YoCite this: Inorg. Chem. 1974, 13, 7, 1720–1724Publication Date (Print):July 1, 1974Publication History Published online1 May 2002Published inissue 1 July 1974https://pubs.acs.org/doi/10.1021/ic50…
Abstract The purpose of this study was to investigate the influence of seed crystal size on the rate of nucleation in batch stirred‐tank crystallizers. Experimental results confirm the existence of such an effect. Nucleation rate data are correlated with a second‐order polynomial in seed crystal size; coefficients of…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTGas phase thermal decomposition of tert-butyl alcoholDavid Lewis, Mark Keil, and Michael SarrCite this: J. Am. Chem. Soc. 1974, 96, 14, 4398–4404Publication Date (Print):July 1, 1974Publication History Published online1 May 2002Published inissue 1 July 1974https://pubs.acs.o…
The behavior of coat-substrate systems subjected to repeated impingements of liquid droplets was investigated. The systems studied consisted of a thick homogeneous substrate covered by a single layer of homogeneous coating of arbitrary thickness. Based on the uniaxial stress wave model, the variations of the stresses…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStereochemistry of cobalt porphyrins. II. Characterization and structure of meso-tetraphenylporphinatobis(imidazole)cobalt(III) acetate monohydrate monochloroformate, [Co(Im)2(TPP)][OAc].H2O.CHCl3Joseph W. Lauher and James A. IbersCite this: J. Am. Chem. Soc. 1974, 96, 14, 4…
With the homeotropic boundary condition, the field-induced cholesteric-to-nematic texture transition can show a large hysteresis effect such that at the same field strength either the cholesteric or the nematic texture is stable.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSpinodal Phase Separation in a Macromolecular Sol → Gel TransitionG. T. Feke and W. PrinsCite this: Macromolecules 1974, 7, 4, 527–530Publication Date (Print):July 1, 1974Publication History Published online1 May 2002Published inissue 1 July 1974https://pubs.acs.org/doi/10.1…
Abstract The conformation and crystalline packing of V‐anhydrous amylose has been investigated by a combination of linked atom model building and X‐ray diffraction analysis. The unit cell, the P2 1 2 1 2 1 space group, the left‐handed sixfold helical conformation with all O(6) in gt rotational positions, and the intra…
A translucent polycrystalline MgAl 2 O 4 ceramic was prepared from finely divided coprecipitated spinel in which a small amount of CaO added as a sintering aid was uniformly distributed. The CaO promotes densification through the formation of a liquid phase at the sintering temperatures. Depending on the sintering tre…
A theory is presented for the ion depletion of glass beneath a blocking anode. The theoretical model is based on the assumption that the alkali ions in an alkali silicate glass have a much greater mobility than the nonbridging oxygen ions in the alkali‐depleted region. In this case, the dc conduction properties of the…
Abstract K 4 W(CN) 8 · 2 H 2 O was prepared by the reduction of WO (in potassium cyanide medium) by KBH 4 . The reduction proceeds on the slow, drop‐by‐drop addition of concentrated acetic acid. The synthesis is simple and efficient because the reduction and complexation are accomplished at the same time.
The critical resolved shear stress (C.R.S.S.) for (010) [001] slip in oriented high- density polyethylene (HDPE) has been measured as a function of temperature between 0° and 100°C. The variation of the C.R.S.S. with temperature has been interpreted in terms of yield by means of the thermal activation of dislocations…
In thermoplastic urethane elastomers, phase separation between hard and soft segments resulting in a domain structure is an essential condition for a sufficiently high heat distortion temperature. The state of segregation, i.e., the domain structure, is characterized by the following aspects: 1) the size distribution,…
The optical absorption of 3d transition elements in fused silica was studied. A series of high‐quality silica glasses doped with 0.01 to 0.1 wt% of each transition element (V through Cu) was prepared by a vapor hydrolysis technique. Their optical spectra were measured, and their practical absorptivities were calculate…