17,034 research outputs found
H. J. Ward
No full textBook Review of H. J. Ward, by David Saunders. ISBN 9780982004135. Reviewed by Deirdre D. Spencer
Letter from David Babbitt to Ralph Cameron
No full textLetter from David Babbitt supporting the establishment of a post office in the Grand Canyon National Park
3,5,5-Trimethyl-2-[2-(phenylsulfonyl)ethyl]-2-cyclo-hexen-1-one
No full textThe structure of title compound, C₁₇H₂₂O₃S, reveals conjugation between the double bond within the cyclohexene ring and the exocyclic carbonyl, and, as a result, the three substituents at C1—C3 occupy equatorial positions.A. David Ward, Virginia R. Ward, Edward R. T. Tiekin
Chiral pyridyl phosphinite catalysts and the development of structure selectivity relationships in the asymmetric hydrogenation of trisubstituted alkenes
No full textThe current trend in developing asymmetric catalysts is towards creating specialized molecules with tailored functions for increased selectivity in classes of substrates rather than general catalysts capable of broad application. In addition, the capacity to generate groups of catalysts with incremental changes to overall structure allows for a more detailed analysis of contributions to the structure selectivity relationships for a variety of substrates. This information can then be used to identify ideal catalysts or improve selectivity and activity of for a particular system.
Asymmetric hydrogenation of substituted alkenes with chiral iridium N,P complexes that were developed from the achiral Crabtree Complex have proven to be extraordinary selective and active catalysts. Screening a series of trisubstituted alkenes on 1st and 2nd generation catalysts indicated a strong enantioselectivity dependence on the phosphorus and pyridine substituents. In particular, the substituents in the ortho position of the pyridine ring were found to have significant control over the catalyst.
The synthesis of the 3rd generation of chiral pyridyl phosphinite catalysts takes advantage of a flexible late phase incorporation of the functional groups which govern the selectivity of the asymmetric hydrogenation to span a range of steric and electronic properties. The screening of these catalysts in the asymmetric hydrogenation of several classes of trisubstituted alkenes provided clear insight to the factors controlling enantioselectivity which were proven to vary greatly with the nature of the substrate and catalyst. Several catalysts with exceptional selectivity were identified for multiple examples of trisubstituted alkenes which had proven difficult with previous system
Die nöthige und nützliche Wißenschaft der Anatomie als der erfreuliche Hochzeits-Tag Des Hoch-Edlen und Kunsterfahrnen Herrn, Herrn David Jacobsen Regiments-Feldscherer bey dem Jütisch geworbenen Infanterie Regiment mit der HochEdlen und Tugendsahmen Jungfer, Jungfer Anna Hedewig Kastroppen unter Priesterlicher Copulation den 11ten Novembr. 1745. feyerlich celebriret ward
No full textDIE NÖTHIGE UND NÜTZLICHE WISSENSCHAFT DER ANATOMIE ALS DER ERFREULICHE HOCHZEITS-TAG DES HOCH-EDLEN UND KUNSTERFAHRNEN HERRN, HERRN DAVID JACOBSEN REGIMENTS-FELDSCHERER BEY DEM JÜTISCH GEWORBENEN INFANTERIE REGIMENT MIT DER HOCHEDLEN UND TUGENDSAHMEN JUNGFER, JUNGFER ANNA HEDEWIG KASTROPPEN UNTER PRIESTERLICHER COPULATION DEN 11TEN NOVEMBR. 1745. FEYERLICH CELEBRIRET WARD
Die nöthige und nützliche Wißenschaft der Anatomie als der erfreuliche Hochzeits-Tag Des Hoch-Edlen und Kunsterfahrnen Herrn, Herrn David Jacobsen Regiments-Feldscherer bey dem Jütisch geworbenen Infanterie Regiment mit der HochEdlen und Tugendsahmen Jungfer, Jungfer Anna Hedewig Kastroppen unter Priesterlicher Copulation den 11ten Novembr. 1745. feyerlich celebriret ward ( - )
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Durch alle 9 Musen ließ bey der erfreulichen Ehe-Verbindung des Hoch-Edlen und Kunsterfahrnen Herrn, Herrn David Jacobsen, Regiments-Feldscherers bey dem hochlöblichen Jütisch geworbenen Infanterie-Regiment, mit der Hoch-Edlen und Tugendreichen Jungfer, Jungfer Anna Hedewig Kastroppen, als selbige den 11. Novembr. 1745. durch priesterliche Einsegnung vollzogen ward
No full textDURCH ALLE 9 MUSEN LIESS BEY DER ERFREULICHEN EHE-VERBINDUNG DES HOCH-EDLEN UND KUNSTERFAHRNEN HERRN, HERRN DAVID JACOBSEN, REGIMENTS-FELDSCHERERS BEY DEM HOCHLÖBLICHEN JÜTISCH GEWORBENEN INFANTERIE-REGIMENT, MIT DER HOCH-EDLEN UND TUGENDREICHEN JUNGFER, JUNGFER ANNA HEDEWIG KASTROPPEN, ALS SELBIGE DEN 11. NOVEMBR. 1745. DURCH PRIESTERLICHE EINSEGNUNG VOLLZOGEN WARD
Durch alle 9 Musen ließ bey der erfreulichen Ehe-Verbindung des Hoch-Edlen und Kunsterfahrnen Herrn, Herrn David Jacobsen, Regiments-Feldscherers bey dem hochlöblichen Jütisch geworbenen Infanterie-Regiment, mit der Hoch-Edlen und Tugendreichen Jungfer, Jungfer Anna Hedewig Kastroppen, als selbige den 11. Novembr. 1745. durch priesterliche Einsegnung vollzogen ward ( - )
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Letter from Rexford Newcomb to David H. Scott, January 23, 1937
No full textLetter from Rexford Newcomb, Dean of the College of Fine and Applied Arts at the University of Illinois to David H. Scott of Harper and Brothers commenting on Watkin's book, The Church of Tomorrow
Letter from Roy Jones to David H. Scott of Harper & Brothers, January 5, 1937
No full textLetter from Roy Jones, Professor in Charge of the School of Architecture at the University of Minnesota to David H. Scott of Harper & Brothers favorably commenting on Watkin's book, The Church of Tomorrow
A defence of Mr. Garrick, in answer to the letter-writer. With remarks upon plays and players, and the present state of the stage. By a dramatic author [electronic resource].
No full textThe letter-writer = H. W., i.e. Edward Purdon, author of 'A letter to David Garrick, Esq; on opening the Theatre' published 13 October, 1759.Price from imprint: price One-Shilling.Electronic reproduction.English Short Title Catalog,Reproduction of original from British Library
Cloning and analysis of the human complement factor H gene promoter
No full textThe 5' flanking region of human factor H was cloned using nested polymerase chain reaction (PCR) and the promoter finder method. A total of 1.2 kb has been sequenced and a number of putative regulatory elements identified including glucocorticoid response elements, cAMP responsive element, HTF-1, and acute phase signal sequences. A 717 b.p. fragment was cloned into a CAT reporter vector and transfected into HeLa cells. A series of truncations from the 5' end of this fragment were also cloned into the CAT vector. Analysis of CAT activity of the cell lysates showed that the region from -699 to +18 is likely to contain promoter elements for the factor H gene as it was able to drive transcription of the CAT gene.Helena M Ward, Naomi H Higgs, Timothy K Blackmore, Tania A Sadlon and David L Gordo
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