Exploring Multi-Component Superconducting Compounds by a High-Pressure Method and Ceramic Combinatorial Chemistry

In this short review, we provide some new insights into the material synthesis and characterization of modern multi-component superconducting oxides. Two different approaches such as the high-pressure, high-temperature method and ceramic combinatorial chemistry will be reported with application to several typical examples. First, we highlight the key role of the extreme conditions in the growth of Fe-based superconductors, where a careful control of the composition-structure relation is vital for understanding the microscopic physics. The availability of high-quality LnFeAsO (Ln = lanthanide) single crystals with substitution of O by F, Sm by Th, Fe by Co, and As by P allowed us to measure intrinsic and anisotropic superconducting properties such as Hc2, Jc. Furthermore, we demonstrate that combinatorial ceramic chemistry is an efficient way to search for new superconducting compounds. A single-sample synthesis concept based on multi-element ceramic mixtures can produce a variety of local products. Such a system needs local probe analyses and separation techniques to identify compounds of interest. We present the results obtained from random mixtures of Ca, Sr, Ba, La, Zr, Pb, Tl, Y, Bi, and Cu oxides reacted at different conditions. By adding Zr but removing Tl, Y, and Bi, the bulk state superconductivity got enhanced up to about 122 K.

Description of, and 238U, 234U, 232Th and 230Th measurements on a nodule from R/V Sonne station SO79_62KD, Central East Pacific Ocean

Two diagenetic manganese nodules from the Peru Basin were investigated by thermal ionization mass spectrometry and high resolution alpha spectrometry for uranium and thorium. The TIMS concentrations for nodule 62KD (63KG) vary as follows: 0.12-1.01 ppb (0.06-0.59) 230Th, 0.51-1.98 ppm (0.43-1.40) 232Th, 0.13-0.80 ppb (0.09-0.49) 234U, and 1.95-13.47 ppm (1.66-8.24) 238U. Both nodules have average growth rates of ~110 mm per million years. However, from the variations of excess 230Th with depth we estimate partial accumulation rates which range from 50 to 400 mm per million years. The 234U dating method cannot be applied due to remobilization of U from the sediment and subsequent incorporation into the nodules' crystal lattice, reflected by decay corrected 234U values far above the ocean water value. Sections of fast nodule growth are related to those layers having high Mn/Fe ratios (up to 200) and higher densities. As a possible explanation we develop a scenario that describes similar glacial/interglacial trends in both nodules as a record of regional changes of sediment and/or deep water chemistry.

Proposed system for determining NPDES and NIPDWR method equivalency.

Mode of access: Internet.

To change procedure in the federal courts in certain cases : Hearings before the Committee on the judiciary, House of representatives, Seventieth Congress, first session, on H.R. 5608, H.R. 8230, H.R. 8555, H.R. 8556 ... January 17-Feb. 7 & 14, 1928. Part I-II.

"These bills relate to the same general subject. It involves the question of trying to devise some method of relieving the congestion of business in the United States District courts."--p.

Method development for determination of polychlorinated hydrocarbons in municipal sludge /

Mode of access: Internet.

The complete confectioner, or, Housekeeper's guide to a simple and speedy method of understanding the whole art of confectionary : the various ways of preserving and candying, dry and liquid, all kinds of fruit, nuts, flowers, herbs, &c. And the method of keeping them fresh and fine all the year round; the different ways of clarifying sugar; with directions for making fruit pastes, bomboons, pastils, compotes, fruit ices, cream ices, marmalades, jellies, jams, cakes, puffs, biscuits, tarts, custards, cheesecakes, sweetmeats, fritters, creams, syllabubs, blanc-mange, flummeries, ornaments for grand entertainments, dragees, syrups of all kinds, nicknacks and trifles for desserts, strong cordials, oils, simple waters, milk punch that will keep 20 years, and all sorts of English wines. Also, the art of making artificial fruit, with the stalks in it, so as to resemble the natural fruit. To which are added, some bills of fare for desserts for private families /

Originally published under title: The compleat confectioner. Cf. Bitting, K.G. Gastronomic bib., p. 190.

Drainage channel and waterway; a history of the effort to secure an effective and harmless method for the disposal of the sewage of the city of Chicago, and to create a navigable channel between Lake Michigan and the Missippi River,

Mode of access: Internet.

Guidelines for air sampling and analytical method development and evaluation /

Mode of access: Internet.

Background effects in the induced polarization method of geophysical exploration : annual progress report for 1956-57 /

"June 28, 1957."

The SPM energy flux method for predicting longshore transport rate /

"June 1980."

Novel duplex vapor-electrochemical method for silicon solar cells /

"Contract No. 954471 under NAS 7-100 SRI Project PYU 4980."

Novel duplex vapor-electrochemical method for silicon solar cells /

"Contract No. 954471 under NAS 7-100 SRI Project PYU 4980."

A method for censusing deer and its application in the Edwards Plateau of Texas.

Contribution of the Federal Aid in Wildlife Restoration Act, Final report for Texas Federal Aid project 25-R, July l, 1946, to March 30, 1948.

The method of characteristics in compressible flow.

Reproduced from typewritten copy.