3,010 research outputs found
''Menger Hotel,'' San Antonio, Texas
No full textThis view of the famous Menger Hotel in San Antonio was taken by A. F. Dignowity, the son of author, daguerreotypist, and physician Anthony Michael Dignowity. Dignowity operated for a relatively short period of time, and his work is uncommon. Source: Lawrence T. Jones III.Attributed to: Dignowity, A. F. (Anthony Francis), 1844-1921. Verso: [handwritten in ink] ''Menger Hotel'' San Antonio Texas
The impact of colonial taxation system in Chirumanzu district from 1900- 1980.
No full textThe period between 1900-1980 witnessed effective occupation by the colonialists administration in Rhodesia. The colonial regime imposed potentate rule through their introduction of the colonial taxation system on black people in Chirumanzu district. The plight of black people in Chirumanzu district towards the impact of colonial taxes has been largely ignored by post-colonial historians. In this study l take perspective to primarily focus on how black people were exposed to deplorable conditions coupled with their reactionary tendencies as an impact of the colonial taxation system mainly in Chirumanzu district and partially Zimbabwe. Generally this study argues that in Chirumanzu reserve the colonial taxation system infringed black people rights and further acted as a blockade to their economic development whilst favouring more profits towards the white community. Laws such as the Masters and Servants Ordinance of 1901 which made it a criminal offence to break a labour contract, and denying favourable markets for African produce among many others were imposed on Africans so as to secure cheap labour and achieve the settlers’ main goal of making immense profits in Rhodesia. The colonial taxation system in Chirumanzu district was “a great vampire squid, wrapped around the face of humanityâ€. This study also argues that colonial taxes were an emotional and sensitive issue to black people in Chirumanzu since they were taxed from domestic animals to property, personal belongings and almost everything. It cornered Africans to the point of formulating resistance. Methodologically this study depends on primary sources in form of oral testimonies and also written sources with original pictorial evidence
Photolysis of diazirines in the presence of C-60: A chemical probe for carbene
No full textPT: J; CR: AKASAKA T, 1999, J ORG CHEM, V64, P566 AKASAKA T, 1999, ORG LETT, V1, P1509 AN YZ, 1994, J ORG CHEM, V59, P2927 ANDERSON HL, 1994, ANGEW CHEM INT EDIT, V33, P1366 BINKLEY JS, 1980, J AM CHEM SOC, V102, P939 BONNEAU R, 1996, J AM CHEM SOC, V118, P7229 DIEDERICH F, 1994, CHEM SOC REV, P243 DIEDERICH F, 1994, NATURE, V369, P199 FRISCH MJ, 1988, PHYS REV A, V38, P3098 GANZER GA, 1986, J AM CHEM SOC, V108, P1517 GONZALEZ R, 1995, J ORG CHEM, V60, P2618 GRILLER D, 1982, J AM CHEM SOC, V104, P5549 GRILLER D, 1983, J ORG CHEM, V48, P1359 HIRSCH A, 1993, ANGEW CHEM INT EDIT, V32, P1138 HIRSCH A, 1993, CHEM BER, V126, P1061 HIRSCH A, 1994, CHEM FULLERENES HIRSCH A, 1999, FULLERENES RELATED S ISAACS L, 1993, HELV CHIM ACTA, V76, P2454 JANSSEN RAJ, 1995, J AM CHEM SOC, V117, P544 KOMATSU K, 1993, CHEM LETT, P2163 LEE C, 1988, PHYS REV B, V37, P785 LIU MTH, 1987, CHEM DIAZIRINES, V1 MARTIN N, 1998, CHEM REV, V98, P2527 SMITH AB, 1993, J AM CHEM SOC, V115, P5829 STEVENS IDR, 1990, J CHEM SOC P2, P661 SUZUKI T, 1991, SCIENCE, V254, P1186 SUZUKI T, 1992, J AM CHEM SOC, V114, P7301 SUZUKI T, 1994, J AM CHEM SOC, V116, P1359 TAYLOR R, 1993, NATURE, V363, P685 TAYLOR R, 1995, CHEM FULLERENES TOKUYAMA H, 1993, TETRAHEDRON LETT, V34, P7429 TSUDA M, 1993, TETRAHEDRON LETT, V34, P6911 TURRO NJ, 1980, J AM CHEM SOC, V102, P7576 TURRO NJ, 1982, J AM CHEM SOC, V104, P1754 VASELLA A, 1992, ANGEW CHEM INT EDIT, V31, P1388; NR: 35; TC: 8; J9: J AM CHEM SOC; PG: 2; GA: 340FPSource type: Electronic(1
Deformation density studies of ring systems. 2. The deformation density of the diazirine ring in the X-ray structure of 3-[(p-Nitrophenoxy) methyl]-3-chlorodiazirine
No full textThe crystal structure and electron density of 3-[(p-nitrophenoxy)methyl]-3-chlorodiazirine have been analyzed using single crystal X-ray diffraction at 208 K with Mo K alpha radiation to a resolution of sin(theta(max))/lambda = 1.126 Angstrom(-1). A total of 10 440 measured reflections gave 7742 unique reflections with R(m) = 0.026. A multipole atomic density model was fitted to these reflections to give an R(F) = 0.0311. The deformation density of the phenyl portion of the compound is as expected. The dynamic deformation density of the diazirine ring, however, suggests that the bonding in the three-membered ring is a combination of the classical severely-strained cr bonding system with a significant contribution of a a donation from the N=N to an sp(2) carbon. This observation is placed in the context of similar proposals for the bonding in cyclopropanes.PT: J; CR: ALLEN FH, 1987, J CHEM SOC PERK T 2, S1 BAERT F, 1982, ACTA CRYSTALLOGR A, V38, P143 BATTAGLIA R, 1980, Z NATURFORSCH B, V35, P719 BLESSING R, ACA T, P26 CAMERON TS, 1992, J AM CHEM SOC, V114, P1889 CAMERON TS, 1994, J AM CHEM SOC, V116, P1211 CREMER D, 1985, J AM CHEM SOC, V107, P3800 CREMER D, 1985, J AM CHEM SOC, V107, P3811 DEWAR MJS, 1979, J AM CHEM SOC, V101, P783 DOMENICANO A, 1975, ACTA CRYSTALLOGR B, V31, P221 DUNITZ JD, 1983, HELV CHIM ACTA, V66, P123 HANSEN NK, 1978, ACTA CRYSTALLOGR A, V34, P909 HIRSHFELD FL, 1991, CRYST REV, V2, P169 LINDEN A, 1988, J ORG CHEM, V53, P1085 LIU MTH, 1986, J CHEM SOC PERK T 2, P211 SCHMIDT MW, 1990, QCPE B, V10, P52 SEILER P, 1988, HELV CHIM ACTA, V71, P2100 SMITH VH, 1977, ISRAEL J CHEM, V16, P87 SOUHASSOU M, 1992, J AM CHEM SOC, V114, P2371 STEINER T, 1993, ACTA CRYSTALLOGR A, V49, P379 STEVENS IDR, 1990, J CHEM SOC P2, P661 STEWART RF, 1969, J CHEM PHYS, V51, P4569 WALSH AD, 1949, T FARADAY SOC, V45, P179 WIBERG KB, 1987, J AM CHEM SOC, V109, P985; NR: 24; TC: 4; J9: J AMER CHEM SOC; PG: 7; GA: NV421Source type: Electronic(1
Mass spectrometric identification of polycycloaddition of arylchlorocarbenes and fluorenylidene to buckministerfullerene
No full textPT: J; CR: ALLEMAND PM, 1991, J AM CHEM SOC, V113, P1050 DOYLE MP, 1986, TETRAHEDRON LETT, V27, P4395 DOYLE MP, 1987, CHEM DIAZIRINES, CH8 KOMATSU, 1993, CHEM LETT, P2163 KROTO HW, 1985, NATURE, V318, P162 KRUSIC PJ, 1991, SCIENCE, V254, P1183 MOSS RA, 1989, ACCOUNTS CHEM RES, V22, P15 SHI S, 1992, J AM CHEM SOC, V114, P10656 SOUNDARARAJAN N, 1988, J AM CHEM SOC, V110, P7143 SUZUKI T, 1991, SCIENCE, V254, P1186 VASELLA A, 1992, ANGEW CHEM INT EDIT, V31, P1338 WUDL F, 1992, ACCOUNTS CHEM RES, V25, P157 WUDL F, 1993, BUCKMINSTERFULLERENE, CH13 XIE QS, 1992, J AM CHEM SOC, V114, P3978; NR: 14; TC: 1; J9: ORG MASS SPECTROM; PG: 3; GA: NY268Source type: Electronic(1
A verification of the photolytic decomposition pathways of 3-tert-butyl-3-chlorodiazirine based on the application of the C-60 probe technique
No full textC-60 acts as a mechanistic probe for the formation of carbene and for the rearranged product via the excited state in the photolysis of 3-t-butyl-3-chlorodiazirine. (C) 2004 Published by Elsevier Ltd.PT: J; CR: AKASAKA T, 2000, J AM CHEM SOC, V122, P7134 BONNEAU R, 2000, J PHYS CHEM A, V104, P4115 DIEDERICH F, 1994, CHEM SOC REV, V1, P243 GRAHAM WH, 1965, J AM CHEM SOC, V87, P4396 HIRSH A, 1999, FULLERENES RELATED S KORSHUNOVA GA, 2000, MOL BIOL+, V34, P823 LIU MTH, 1996, J AM CHEM SOC, V118, P8098 MODARELLI DA, 1992, J AM CHEM SOC, V114, P7034 MODARELLI DA, 1993, J AM CHEM SOC, V115, P470 MOSS RA, 1990, J AM CHEM SOC, V112, P5642 MOSS RA, 1993, J CHEM SOC CHEM COMM, P1597 RICHARDS FM, 2000, PROTEIN SCI, V9, P2506 WAKAHARA T, 2002, J AM CHEM SOC, V124, P9465 WHITE WR, 1992, J ORG CHEM, V57, P2841; NR: 14; TC: 2; J9: TETRAHEDRON LETT; PG: 2; GA: 843UMSource type: Electronic(1
Pyrolysis of trifluoroacetaldehyde, initiated by di-tertiary-butyl peroxide decomposition
No full textPT: J; CR: ARTHUR NL, 1965, AUST J CHEM, V18, P1561 AYSCOUGH PB, 1956, J CHEM PHYS, V24, P994 BATT L, 1977, INT J CHEM KINET, V9, P141 COME GM, 1968, REV I R PETROLE, V23, P1365 COX DL, 1966, J CHEM SOC B, P245 DODD RE, 1957, J CHEM SOC, P1465 FERGUSON JM, 1965, J CHEM SOC, P4416 GRAY P, 1971, CHEM REV, V71, P247 HIATT R, 1972, INT J CHEM KINET, V4, P479 HIATT R, 1978, INT J CHEM KINET, V10, P185 HOOPER DG, 1975, J CHEM EDUC, V52, P131 LIU MH, 1973, CAN J CHEM, V51, P2292 LIU MTH, 1968, CAN J CHEM, V46, P479 LIU MTH, 1977, INT J CHEM KINET, V9, P589 MORRIS ER, 1967, T FARADAY SOC, V63, P2470 MORRIS ER, 1968, T FARADAY SOC, V64, P3027 PEARCE C, 1971, J CHEM SOC CHEM COMM, P1464 SHAW DH, 1968, CAN J CHEM, V46, P2721 SHEPP A, 1956, J CHEM PHYS, V24, P939 WIJNEN MHJ, 1960, J AM CHEM SOC, V82, P1847 YEEQUEE MJ, 1968, J PHYSICAL CHEMISTRY, V72, P2824 YEEQUEE MJ, 1968, T FARADAY SOC, V64, P1296; NR: 22; TC: 10; J9: CAN J CHEM; PG: 10; GA: HN360Source type: Electronic(1
A complex and punctate distribution of three eukaryotic genes derived by lateral gene transfer
No full textAbstract Background Lateral gene transfer is increasingly invoked to explain phylogenetic results that conflict with our understanding of organismal relationships. In eukaryotes, the most common observation interpreted in this way is the appearance of a bacterial gene (one that is not clearly derived from the mitochondrion or plastid) in a eukaryotic nuclear genome. Ideally such an observation would involve a single eukaryote or a small group of related eukaryotes encoding a gene from a specific bacterial lineage. Results Here we show that several apparently simple cases of lateral transfer are actually more complex than they originally appeared: in these instances we find that two or more distantly related eukaryotic groups share the same bacterial gene, resulting in a punctate distribution. Specifically, we describe phylogenies of three core carbon metabolic enzymes: transketolase, glyceraldehyde-3-phosphate dehydrogenase and ribulose-5-phosphate-3-epimerase. Phylogenetic trees of each of these enzymes includes a strongly-supported clade consisting of several eukaryotes that are distantly related at the organismal level, but whose enzymes are apparently all derived from the same lateral transfer. With less sampling any one of these examples would appear to be a simple case of bacterium-to-eukaryote lateral transfer; taken together, their evolutionary histories cannot be so simple. The distributions of these genes may represent ancient paralogy events or genes that have been transferred from bacteria to an ancient ancestor of the eukaryotes that retain them. They may alternatively have been transferred laterally from a bacterium to a single eukaryotic lineage and subsequently transferred between distantly related eukaryotes. Conclusion Determining how complex the distribution of a transferred gene is depends on the sampling available. These results show that seemingly simple cases may be revealed to be more complex with greater sampling, suggesting many bacterial genes found in eukaryotic genomes may have a punctate distribution.</p
Structural determination of metallofullerene SC3C82 revisited: A surprising finding
No full textPT: J; CR: AKASAKA T, 2000, J AM CHEM SOC, V122, P9316 AKASAKA T, 2001, J PHYS CHEM B, V105, P2971 AKASAKA T, 2002, ENDOFULLERENES NEW F BECKE AD, 1988, PHYS REV A, V38, P3098 BECKE AD, 1993, J CHEM PHYS, V98, P5648 CHAI Y, 1991, J PHYS CHEM-US, V95, P7564 FOWLER PW, 1995, ATLAS FULLERENES, P255 FRANCL MM, 1982, J CHEM PHYS, V77, P3654 HAY PJ, 1985, J CHEM PHYS, V82, P299 HEATH JR, 1985, J AM CHEM SOC, V107, P7779 KATO T, 1995, J PHYS CHEM-US, V99, P856 KOBAYASHI K, 1999, CHEM PHYS LETT, V313, P45 KOBAYASHI K, 2002, CHEM PHYS LETT, V362, P373 LEE C, 1988, PHYS REV B, V37, P785 NAGASE S, 1997, J MOL STRUC-THEOCHEM, V398, P221 NISHIBORI E, 1998, CHEM PHYS LETT, V298, P79 NISHIBORI E, 2000, CHEM PHYS LETT, V330, P497 NISHIBORI E, 2001, ANGEW CHEM INT EDIT, V40, P2998 NISHIBORI E, 2004, PHYS REV B, V69 SHINOHARA H, 1992, NATURE, V357, P52 SHINOHARA H, 1994, J PHYS CHEM-US, V98, P8597 STEVENSON S, 1999, NATURE, V401, P55 SUN BY, 2005, ANGEW CHEM INT EDIT, V44, P4568 TAKATA M, 1995, NATURE, V377, P46 TAKATA M, 1997, PHYS REV LETT, V78, P3330 TAKATA M, 1999, PHYS REV LETT, V83, P2214 TAKATA M, 2003, STRUCT CHEM, V14, P23 TAKATA M, 2004, STRUCT BOND, V109, P59 VANLOOSDRECHT PHM, 1994, PHYS REV LETT, V73, P3415 WAKAHARA T, 2002, CHEM PHYS LETT, V360, P235 WAKAHARA T, 2004, J AM CHEM SOC, V126, P4883 WANG CR, 2000, NATURE, V408, P426 WANG CR, 2001, ANGEW CHEM INT EDIT, V40, P397 YANNONI CS, 1992, SCIENCE, V256, P1191; NR: 34; TC: 6; J9: J AM CHEM SOC; PG: 2; GA: 966RQSource type: Electronic(1
Timor-Leste human development report 2011 : managing natural resources for human development : developing the non-oil economy to achieve the MDGs
No full textPrincipal Author John G Taylor, Coordinator Rui Gomes, Authors, Technical Background Papers Tobias N. Rasmussen, Andrew Rosser, Martin Sandbu, Michael Ross, Tibor van Staveren, Ricardo F. Neupert, Rui A. Gomes, John G Taylor, Sonny Harmadi, Hafiz Pash
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