Materials Literature
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ABSTRACT AN experimental dryer was designed and fabricated for thin layer drying studies of pecans. Thin layer drying data were obtained for in-shell pecans for 16 drying conditions involving four dry bulb temperatures (29.4, 35.0, 40.5 and 46.1 C) and four dew point temperatures (8.9, 13.3, 17.8 and 22.2 C). Four mat…
Abstract The thermodynamic properties of isotactic polypropylene in the fully crystalline, glassy, and molten state are established from 0 to 500 K based on data bank heat capacities and the vibrational frequency spectrum. The seven skeletal vibrations are described by θ 3 and θ 1 of 91 and 714 K for crystalline polyp…
Abstract
The development of texture and plastic anisotropy (γ-value) during the annealing of low-carbon steel is described. The effects of various industrial processing parameters are considered as well as effects of steel chemistry and microstructure. Comparison is made of box-annealing and continuous annealing technologies.
Tribology in metalworking: friction, lubrication, and wear , Tribology in metalworking: friction, lubrication, and wear , مرکز فناوری اطلاعات و اطلاع رسانی کشاورزی
During the last few decades fluorescence spectroscopy has developed into an important and widely used technique in the physical, chemical, and biological sciences. The increasing sophistication of theory and methodology has permitted us to apply fluorescence techniques profitably to a variety of complex problems. A fu…
We have studied Raman scattering from 〈100〉 GaAs samples implanted with 270-keV As+ ions with various fluences up to 3.2×1014 cm−2. In addition to phonon density of states effects, we observe a softening and asymmetric broadening of the allowed LO phonon while the small symmetry forbidden TO phonon remains almost unch…
In any particular clay stratum the ratio of the plasticity index to the clay fraction content is approximately constant, and may be defined as the “activity” of the clay. Values of activity are given for many clays and also for the more common minerals. It is shown that activity is related to the mineralogy and geolog…
Pharmacokinetic studies of GdDTPA/dimeglumine in man show a rapid renal clearance and no evidence for dissociation or retention of the complex in the body. These features, in conjunction with its strong proton relaxation enhancement and its low toxicity suggest that this complex may be an excellent contrast medium for…
We have explored the hard magnetic properties of melt-spun Nd-Fe-B alloys. A maximum energy product of 14.1 MG Oe has been observed, the highest value ever reported for a light rare earth-iron material. X-ray analyses indicate that the alloys exhibiting optimum characteristics are comprised of roughly spherical crysta…
Band structure of the ferrimagnetic Fe 3 O 4 was calculated in the high temperature cubic phase by means of self-consistent APW method. Though the obtained band structure corresponds closely with the ionic Néel model, it was shown that the itinerant electron model is more adequate than the localized electron model. Th…
Prominent examples of inhibitors recommended to protect metallic materials, especially ferrous metals and alloys, from corrosion in hydrochloric, sulphuric, nitric, hydrofluoric, phosphoric, sulphamic, citric, acetic, hydroxyacetic or formic acid or ammonium bifluoride, during acid pickling, scale removal, acid cleani…
Random two-dimensional patterns crop up in a wide variety of scientific contexts. What do they have in common? How can they be classified or analysed? These questions are underlined, and partly answered, by a survey of such patterns, paying particular attention to soap cell networks, metallurgical grain structures and…
"The Sulphate-Reducing Bacteria." British Corrosion Journal, 19(2), p. 55
Part 1 Preparation: definitions preparation of amorphous materials. Part 2 the glass transition theories for the glass transition factors that determine the glass-transition temperature glass-forming systems and ease of glass formation. Part 3 Structure: microscopic structure - experimental techniques, short-range ord…
An Arabian Gulf well with a history of SrSO4 scale making 2,300 bopd and 1,200 bwpd from a zone 150 ft thick was squeeze-treated with 8 drums of scale inhibitor. Fifteen months later, gage rings showed no scale formation down hole, and inhibitor concentration in the produced water continued at an acceptable level. A w…
A band structure calculation using well localised orbitals obtained in a self-consistent manner has been performed on NiO. The localisation of the orbitals allows the treatment of both the valence and the lowest conduction bands by the tight-binding method. The details of the crystal potential are presented. The charg…
Considers the effect of long-range Coulomb interactions on the properties of a model quasi-one-dimensional conductor. Use of the bosonisation method allows the author to obtain an essentially exact solution of the problem. Most spectacularly, for g 1 >0(g 1 is the intrachain backward scattering constant) there is a me…
The Hall effect and the magnetoresistance of ${(\mathrm{TMTSF})}_{2}$Cl${\mathrm{O}}_{4}$ have been measured at temperatures from 0.08 to 10 K and in magnetic fields to 22 T. The low-temperature data suggest a series of transitions induced by an orbital effect from the magnetic field which progressively reduce the car…
Holes are produced inside a thin layer of magnetic fluid with use of monodisperse polystyrene spheres with diameters in the micrometer range. With an external magnetic field an apparent magnetic dipole will be associated with each hole as a result of the displaced fluid. The apparent dipolar interactions between the s…