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.

Annotated record of the detailed examination of Mn deposits from the SO 79 (SEDIPERU - TUSCH) expedition from R/V Sonne

The research cruise SO79 with RV SONNE (April 18 to June 09 1992) aimed to assess the impact of a potential mining activity on the sensitive deep-sea ecosystem of the Peru Basin. Up to now only results of reconnaissance surveys of the extended manganese nodule field discovered in 1978 in the Peru Basin are available. The hydroacoustic, sedimentological, and geochemical studies on data and sample material of SO79 came to the following results: a small-scaled variation in thickness respectively type of surface sediments shown by the sediment echosounder respectively the side-scan-sonar is assumably due to variations in deposition or erosion. The composition of sediments is controlled by climatic cycles of different length which were caused by the variable influence of glaciation of the northern hemisphere. We think that during the quaternary a deep-water circulation reduced in intensity and O2-content may have produced a suboxic diagenetic environment which led to a remobilization and redeposition of Mn forming manganese nodules in the oxic surface sediments. Near the distinct redox boundary at about 10 cm depth the growth conditions for nodules are extremely favourable. Due to the great variability of sediments the impact of deep-sea mining will be highly variable and the disturbance of the seafloor will change the ecosystem considerably.

Boiling water reactor technology status of the art report / [edited by C. Victor Pearson].

"Reactor technology."

Metropolitan Los Angeles, a study in integration.

Includes bibliographies.

Relief work among the villages of Mount Pangaeon, by First-Lieutenant G. C. Barry. Athens, June 1, 1919.

Mode of access: Internet.

A new royal French grammar : containing, I. Easy and plain rules to attain to the thorough understanding, pronouncing, speaking and writing of the French tongue ; II. Familiar phrases and dialogues, fables by Mr. de Fenelon, maxims and various reflections, [etc] ; III. Three vocabularies, the first of words plainly shewing teh nearness, or affinity betwixt the English and French, the second of nouns substantives shewing their genders ; the third of words the same, or nearly alike in sound, but spelt differently and of a different signication.

Mode of access: Internet.

Fables by John Gay in two parts : to which are added Fables by Edward Moore.

Mode of access: Internet.

Free and candid reflections occasioned by the late additional duties on sugars and on rum; submitted to the consideration of the British ministry, the members of both houses of Parliament, and the proprietors of sugar estates in the West-India colonies.

Mode of access: Internet.

In honor of the ninetieth birthday of Charles Frederick Johnson, professor of English in Trinity college, 1883-1906; papers, essays, and stories by his former students,

CONTENTS. (cont.) --The Christianity of the fourth Gospel, by the Rev. C. B. Hedrick.--Correctness, by the Rev. M. B. Stewart.--An optimistic realist, Ernst Zahn, by B. Q. Morgan.--The hermit story, as used by Voltaire and Mark Twain, by F. A. G. Cowper.--Thumbnail classics. Jack Harker at Yalevard, by P. Curtiss.--The man who heard everything, by W. Trumbull.--"Whiskey, bullets, and..."--The novelist takes to real estate, by R. Wright.

Stories by American authors.

v. 6. The village convict, by C. H. White. The Denver express, by A. A. Hayes. The misfortunes of Bro' Thomas Wheatley, by Lina R. Fairfax. The heartbreak cameo, by L. W. Champney. Miss Eunice's glove, by A. Webster. Brother Sebastian's friendship, by H. Frederic.--v. 7. The bishop's vagabond, by Octave Thanet. Lost, by E. Bellamy. Kirby's coals of fire, by Louise Stockton. Passages from the journal of a social wreck, by Margaret Floyd. Stella Grayland, by J. T. McKay. The image of San Donato, by Virginia W. Johnson.--v. 8. The brigade commander, by J. W. De Forest. Split zephyr, by H. A. Beers. Zerviah Hope, by Elizabeth S. Phelps. The life-magnet, by A. A. Adee. Osgood's predicament, by Elizabeth D. B. Stoddard.--v. 9. Marse Chan, by T. N. Page. Mr. Bixby's Christmas visitor, by C. S. Gage. Eli, by C. H. White. Young Strong of "The Clarion," by Milicent W. Shinn. How old Wiggins wore ship, by Captain R. T. Coffin. "--mas has come," by L. Kip.--v. 10. Pancha, by T. A. Janvier. The ablest man in the world, by E. P. Mitchell. Young Moll's peevy, by C. A. Stephens. Manmat'ha, by C. De Kay. A daring fiction, by H. H. Boyesen. The story of two lives, by Julia Schayer.

Public opinion on environmental issues : results of a national public opinion survey /

Item 856-E

Effects of chemical variations in aquatic environments.

Project 18050 DYC.

Reconstruction & social service; being the report of a conference called by the National council of social service.

Mode of access: Internet.

Mr. William Shakespeare, his comedies, histories, and tragedies, set out by himself in quarto, or by the players his fellows in folio, and now faithfully republish'd from those editions in ten volumes octavo; with an introduction ...

Vols. 2-10 have title: The works of Shakespeare. An added t.p. with this title appears also in v. 1, following the "Table of his editions."

RCI update.

Description based on: Winter 1995.