47,893 research outputs found
Personal Papers (MS 80-0002)
No full textLetter from Isaac H. Kempner to H. Y. Cartwright and M. J. Gaido discussing the cost of the golf wagon for Mr. Aicklen
Cartwright on wholism
No full textThis paper proposes a critical examination of the wholism that Cartwright contemplates. The first part spells out the consequences of this position – notably our principled ignorance of nature as a whole. The second part considers that physical theory which is widely claimed to exhibit some sort of wholism, namely quantum physics. I sketch a wholistic model of quantum physics and compare this model to the wholism that Cartwright considers. The result is that – contrary to what Cartwright suggests – we do not have to see ourselves as being ignorant of nature as such and our scientific view of nature can be quite systematic instead of being a patchwork. Finally, Cartwright’s wholism is confronted with confirmation wholism and semantic wholism. The result is again that these sorts of wholism speak against a patchwork view of our knowledge
Application of fast fourier transform cross-correlation for the alignment of large chromatographic and spectral datasets
No full textPreprocessing of Chromatographic and spectral data is an important aspect of analytical sciences. In particular, recent advances in proteomics have resulted in the generation of large data sets that require analysis. To assist accurate comparison of chemical signals, we propose two methods for the alignment of multiple spectral data sets. Based on methods previously described, each Chromatograph or spectrum to be aligned is divided and aligned as individual segments to a reference. However, our methods make use of fast Fourier transform for the rapid computation of a cross-correlation function that enables alignments between samples to be optimized. The proposed methods are demonstrated in comparison with an existing method on a chromatographic and a mass spectral data set. It is shown that our methods provide an advantage of speed and a reduction of the number of input parameters required. The software implementations for the proposed alignment methods are available under the downloads section at http://ptcl.chem.ox.ac.uk/~jwong/specalign. © 2005 American Chemical Society
Letter from John Cartwright, Redding, Alabama, to J. H. Woodward, Birmingham, Alabama, February 25, 1892
No full textThis item is from the Woodward Family Papers, an extensive collection, including business and personal correspondence, financial records, photographs, and other materials of this Birmingham, Alabama family which operated the Woodward Iron Company
Longitudinal Variation of HO Ice Absorption on Miranda
No full textMany tidally locked icy satellites in the outer Solar System show
leading/trailing hemispherical asymmetries in the strength of near-infrared
(NIR) HO ice absorption bands, in which the absorption bands are stronger
on the leading hemisphere. This is often attributed to a combination of
magnetospheric irradiation effects and impact gardening, which can modify grain
size, expose fresh ice, and produce dark contaminating compounds that reduce
the strength of absorption features. Previous research identified this
leading/trailing asymmetry on the four largest classical Uranian satellites but
did not find a clear leading/trailing asymmetry on Miranda, the smallest and
innermost classical moon. We undertook an extensive observational campaign to
investigate variations of the NIR spectral signature of HO ice with
longitude on Miranda's northern hemisphere. We acquired 22 new spectra with the
TripleSpec spectrograph on the ARC 3.5m telescope and 4 new spectra with GNIRS
on Gemini North. Our analysis also includes 3 unpublished and 7 previously
published spectra taken with SpeX on the 3m IRTF. We confirm that Miranda has
no substantial leading/trailing hemispherical asymmetry in the strength of its
HO ice absorption features. We additionally find evidence for an
anti-Uranus/sub-Uranus asymmetry in the strength of the 1.5-m HO ice
band that is not seen on the other Uranian satellites, suggesting that
additional endogenic or exogenic processes influence the longitudinal
distribution of HO ice band strengths on Miranda.Comment: 40 pages, 19 figures. Accepted for publication in PS
A 2 h periodic variation in the low-mass X-ray binary Ser X-1
No full textSpectroscopy of the low-mass X-ray binary Ser X-1 using the Gran Telescopio Canarias have revealed a ?2 h periodic variability that is present in the three strongest emission lines. We tentatively interpret this variability as due to orbital motion, making it the first indication of the orbital period of Ser X-1. Together with the fact that the emission lines are remarkably narrow, but still resolved, we show that a main-sequence K dwarf together with a canonical 1.4 M? neutron star gives a good description of the system. In this scenario, the most likely place for the emission lines to arise is the accretion disc, instead of a localized region in the binary (such as the irradiated surface or the stream-impact point), and their narrowness is due instead to the low inclination (?10°) of Ser X-1
Chimarra milneana Cartwright 2020, sp. nov.
No full text<i>Chimarra milneana</i> sp. nov. <p>Figures 41–43</p> <p>Holotype. Male (specimen in alcohol, CT-390 figured), PNG, Milne Bay Province, Milne Bay, about 10° 22' S, 150° 30' E, 14–23 February 1969, J. and M. Sedlacek (BPBM).</p> <p> <i>Diagnosis.</i> The male of <i>C. milneana</i> aligns vaguely with the <i>C. papuana</i> group in possessing a filiform dorsoapical process on the inferior appendages but lacking an elongate ventral process on segment IX (after Mey, 2006) and is most similar to <i>C. bobita</i> Oláh, 2012. <i>Chimarra milneana</i> can be separated from <i>C. bobita</i> and other members of the group by the relatively short ventral process on segment IX and the sharply and complexly angled ventral margin of the inferior appendages.</p> <p> <i>Description.</i> General body colour and wings light brownish. Wings similar to those of <i>C. ukarumpana</i> (fig. 7). Length of forewing: male 4.3 mm. Forewing with forks 1, 2, 3 and 5 present, Rs moderately sinuous or curved, moderately thickened, basad of discoidal cell.</p> <p> <i>Male</i>. Segment IX anterior margin in lateral view, with narrowly rounded extension ventrally (fig. 41); ventral process short, tapered and acute distally (fig. 42), almost reaching distal margin of segment IX (figs 41, 42), in lateral view length about 2.5 times width (fig. 41); preanal appendages sub-rectangular with rounded apices (figs 41, 43). Segment X mesal lobe with dorsally directed, dorso-ventrally flattened projection, lateral lobes elongate, laterally compressed distally, with sensilla not discerned (fig. 43), in lateral view lateral lobes appear robust, with slightly downturned apices (fig. 41), in dorsal view lateral lobes tapered near middle, appear very slender in distal half (fig. 43). Phallus with two slender spines included subapically (fig. 43). Inferior appendages robust in basal two thirds, narrowed in distal third, with dorso-subapical projection bearing three hairs apically, directed posteromesally (figs 41– 43), in lateral view inferior appendages angled at about 45° to horizontal, length about 1.6 times width, ventral margin angled at about 90° both near distal two thirds and distally (fig. 41), in ventral view mesal margin angled at about 90° distally, with projection on the mesal surface (fig. 42).</p> <p> <i>Female.</i> Unknown.</p> <p> <i>Etymology. Milneana</i> – named after the type locality (Milne Bay).</p> <p> <i>Remarks. Chimarra milneana</i> is known only from the type locality in south-east PNG.</p>Published as part of <i>Cartwright, David, 2020, A review of the New Guinea species of Chimarra Stephens (Trichoptera: Philopotamidae), pp. 1-49 in Memoirs of Museum Victoria 79</i> on page 16, DOI: 10.24199/j.mmv.2020.79.01, <a href="http://zenodo.org/record/8065297">http://zenodo.org/record/8065297</a>
Daternomina loowa Cartwright 2008, sp. nov.
No full textDaternomina loowa sp. nov. Figures 25–27, 58 Diagnosis. Daternomina loowa can be distinguished from closely related Daternomina species, D. trulla and D. quasitrulla, by having truncate superior appendages and fused, short inferior appendages with relatively shallow notch apically, dividing at most the distal third. Description. Head, body and wings brown; wings similar to D. irrorata (Fig. 1). Forewing length about 2.8–3.0 times width: male 4.4 mm, female 4.6 mm. Forewing fork 2 relatively long, sessile, length about 1.7 times length of fork 3, nygma present; fork 3 relatively long, length about 2.3–2.5 times length footstalk, footstalk length about 1.5–1.7 times length cross-vein m; r-m and m displaced at fork 3 by about 1.8 times length cross-vein m; fork 4 length similar to fork 3; fork 5 long, length about 1.8 times length of fork 4. Hindwing length about 3 times width, fork 2 sessile, length about 1.5 times length of fork 3. Male. Tergum X membranous with a pair of small disto-mesal processes (Fig. 27). Superior appendages strongly laterally compressed; in lateral view, broad, truncate distally, length about 2.5 times width (Fig. 25); in dorsal view, relatively slender, length about 5 times width, with a group of spines on inner surface (Fig. 27). Phallus generally tube-like, with a pair of long embedded spines; with a pair of slender, curved processes (phallic guides) arising from near the base of the inferior appendages (Fig. 25). Inferior appendages small, fused, strongly dorso-ventrally compressed; in ventral view, short, rounded laterally, with a shallow, wide Vshaped notch distally (Fig. 26); in lateral view, relatively short and robust (Fig. 25). Female. Genitalia with a pair of large, narrowly separated 'tongue-shaped' lobes on sternite VIII, with characteristic 'small dark triangle' visible mesally (Fig. 58). Holotype male: Queensland, Seary's Ck, Rainbow Beach, 25º58'S, 153º04'E, 9 Jan 1986, G. Theischinger (NMV, T-19572, specimen CT-457 figured). Paratypes: Queensland. 4 females (specimen CT-493 figured), collected with holotype; 7 females, same loc. and coll., 6 Dec 1984 (NMV). Other material examined: Queensland. 3 females, same loc. and coll. as holotype, 9 Feb 1987; 1 female, Blue Lake, N Stradbroke Isl., 27 May 1973, H. Burton; 1 female, Myora Springs, N Stradbroke Isl., 3 Sep 1974, A. Bensink; 1 female, same loc., 22 Mar 1969, J. Attwood; 1 female, Dunwich (N Stradbroke Isl.), 4 May 1969, lt tr., M. Cox. Etymology. Loowa - northern Australian Aboriginal word for rainbow (type locality-Rainbow Beach). Remarks. One male of Daternomina loowa has been collected from the type locality in south-eastern Queensland, plus females from several localities including North Stradbroke Island (latitudinal range 25º58'- 27º32'S).Published as part of Cartwright, David I., 2008, A review of the Australian species of Ecnomina Kimmins and Daternomina Neboiss (Trichoptera: Ecnomidae), pp. 1-76 in Zootaxa 1774 (1) on pages 17-18, DOI: 10.11646/zootaxa.1774.1.1, http://zenodo.org/record/512413
Rearrangement of alkylchlorocarbenes: 1,2-H shift in free carbene, carbene-olefin complex, and excited states of carbene precursors
No full textPhotolysis of alkylchlorodiazirines (1) in the presence of olefins gives a cyclopropane (3) by addition of the generated carbene to the olefin and a vinyl chloride derivative (2) resulting from a 1,2-H shift rearrangement. This rearrangement may occur either in the carbene or in some excited state, precursor of the carbene (RIES mechanism), or in a ''carbene + olefin complex'' on the way to the formation of 3 (COC mechanism). Results obtained by time-resolved photoacoustic calorimetry as well as by thermolysis and photolysis of ClCH2C(N-2)Cl and CH3(CH2)(2)C(N-2)Cl in the presence of tetramethylethylene clearly indicate that both the RIES and COC mechanisms play a role but with efficiencies which greatly depend on the nature of the diazirine. Reexamination of the results previously obtained with benzylchlorodiazirines indicates that, for this class of diazirines, the RIES mechanism is temperature dependent and has a very low efficiency at room temperature and below, whereas the nonlinearity of the plots [3]/[2] vs [olefin] is mainly due to the COC mechanism.PT: J; CR: BIGOT B, 1978, J AM CHEM SOC, V100, P8575 CHANG KT, 1979, J AM CHEM SOC, V101, P5082 FREY HM, 1966, ADV PHOTOCHEM, V4, P225 GANZER GA, 1986, J AM CHEM SOC, V108, P1517 GRAHAM WH, 1965, J AM CHEM SOC, V87, P4396 HEIHOFF K, 1987, BIOCHEMISTRY-US, V22, P1422 HOUK KN, 1984, J AM CHEM SOC, V106, P4291 HOUK KN, 1984, J AM CHEM SOC, V106, P4293 JACKSON JE, 1994, ADV CARBENE CHEM, V1 KANABUSKAMINSKA JM, 1987, J AM CHEM SOC, V109, P5267 LAVILLA JA, 1989, J AM CHEM SOC, V111, P6877 LAVILLA JA, 1989, J AM CHEM SOC, V111, P712 LAVILLA JA, 1990, TETRAHEDRON LETT, V31, P5109 LIU MTH, 1987, J ORG CHEM, V52, P4223 LIU MTH, 1989, J CHEM SOC CHEM COMM, P12 LIU MTH, 1990, J AM CHEM SOC, V112, P3915 MODARELLI DA, 1991, J AM CHEM SOC, V113, P8985 MODARELLI DA, 1992, J AM CHEM SOC, V114, P7034 MOSS RA, 1993, J CHEM SOC CHEM COMM, P1597 MOSS RA, 1994, ADV CARBENE CHEM, V1 MULDER P, 1988, J AM CHEM SOC, V110, P4090 MULLERREMMERS PL, 1985, J AM CHEM SOC, V107, P7275 NI T, 1989, J AM CHEM SOC, V111, P457 NICKON A, 1993, ACCOUNTS CHEM RES, V26, P84 RUDZKI JE, 1985, J AM CHEM SOC, V107, P7849 SKELL PS, 1969, J AM CHEM SOC, V91, P7131 TOMIOKA H, 1984, J AM CHEM SOC, V106, P454 TURRO NJ, 1982, J AM CHEM SOC, V104, P1754 WARNER PM, 1984, TETRAHEDRON LETT, V25, P4211 WESTRICK JA, 1987, BIOCHEMISTRY-US, V26, P8313 WHITE WR, 1992, J ORG CHEM, V57, P2841 WIERLACHER S, 1993, J AM CHEM SOC, V115, P8943 YAMAMOTO N, 1994, J AM CHEM SOC, V116, P2064; NR: 33; TC: 30; J9: J AMER CHEM SOC; PG: 9; GA: UG695Source type: Electronic(1
Catalytic P-H activation by Ti and Zr catalysts
No full textCatalytic dehydrocoupling of phosphines was investigated using the anionic zirconocene trihydride salts [Cp*Zr-2(mu-H)(3)Li](3) (1a) or [Cp*Zr-2(mu-H)(3)K(thf)(4)] (1b), and the metallocycles [CpTi(NPtBu3)(CH2)(4)] (6) and [Cp*M(NPtBu3)(CH2)(4)] (M = Ti 20, Zr 21) as catalyst precursors. Dehydrocoupling of primary phosphines RPH2 (R = Ph, C6H2Me3, Cy, C10H7) gave both dehydrocoupled dimers RP(H)P(H)R or cyclic oligophosphines (RP)(n) (n = 4, 5) while reaction of tBu(3)C(6)H(2)PH(2) gave the phosphaindoline tBu(2)(Me2CCH2)C6H2PH (9). Stoichiometric reactions of these catalyst precursors with primary phosphines afforded [Cp*Zr-2((PR)(2))H][K(thf)(4)] (R = Ph 2, Cy 3, C6H2Me3 4), [Cp*Zr-2((PPh)(3))H] [K(thf)(4)] (5), [CpTi(NPtBu3)(PPh)(3)] (7) and [CpTi(NPtBu3)(mu-PHPh)](2) (8), while reaction of 6 with (C(6)H(2)tBu3)PH2 in the presence of PMe3 afforded [CpTi(NPtBu3)(PMe3)(p(C(6)H(2)tBu(3))] (10). The secondary phosphines Ph2PH and (PhHPCH2)(2)CH2 also undergo dehydrocoupling affording (Ph2P)(2) and (PhPCH2)(2)CH2. The bisphosphines (CH2PH2)(2) and C6H4(PH2)(2) are dehydrocoupled to give (PCH2CH2PH)(2) (12) and (C6H4P(PH))(2) (13) while prolonged reaction of 13 gave (C6H4P2)(8) (14). The analogous bisphosphine Me2C6H4(PH)(2) (17) was prepared and dehydrocoupling catalysis afforded (Me2C6H2P(PH))(2) (18) and subsequently [(Me2C6H2P2)(2)(mu-Me2C6H2P2)](2) (19). Stoichiometric reactions with these bisphosphines gave [Cp*Zr-2(H)(PH)(2)C6H4] [Li(thf)(4)] (22), [Cp*Ti(NPtBu3)(PH)(2)C6H4](2) (23) and [Cp*Ti(NPtBu3)(PH)(2)C6H4] (24). Mechanistic implications are discussed.PT: J; CR: ALBRAND JP, 1976, J CHEM SOC CHEM COMM, P876 ANSELME JP, 1969, TETRAHEDRON, V25, P855 BASULI F, 2003, J AM CHEM SOC, V125, P10170 BAUDLER M, 1976, Z NATURFORSCH B, V31, P558 BAUDLER M, 1978, CHEM BER, V111, P1210 BAUDLER M, 1978, CHEM BER, V111, P1217 BAUDLER M, 1983, CHEM BER, V116, P2711 BAUDLER M, 1984, Z NATURFORSCH B, V39, P438 BAZAN GC, 1991, J AM CHEM SOC, V113, P6899 BOHM VPW, 2001, ANGEW CHEM, V113, P4832 CHAUVIN Y, 1971, MAKROMOL CHEM, V141, P161 COREY JY, 2004, ADV ORGANOMET CHEM, V51, P1 COURET C, 1986, ORGANOMETALLICS, V5, P113 COWLEY AH, 1984, TETRAHEDRON LETT, V25, P2125 COWLEY AH, 1990, INORG SYNTH, V27, P235 CROMER DT, 1974, INT TABLES CRYSTALLO, V4, P71 ETKIN N, 1997, J AM CHEM SOC, V119, P11420 ETKIN N, 1997, J AM CHEM SOC, V119, P2954 ETKIN N, 1997, ORGANOMETALLICS, V16, P3504 FEHLNER TP, 1992, INORGANOMETALLLICS FERMIN MC, 1995, J AM CHEM SOC, V117, P12645 FERMIN MC, 1995, ORGANOMETALLICS, V14, P4247 FU GC, 1993, J AM CHEM SOC, V115, P9856 GAUVIN F, 1998, ADV ORGANOMET CHEM, V42, P363 GRAHAM TW, 2004, ORGANOMETALLICS, V23, P3309 GRUBBS RH, 1972, J AM CHEM SOC, V94, P2538 GRUBBS RH, 2003, HDB METATHESIS HEY E, 1988, CHEM BER, V121, P561 HEY E, 1989, J ORGANOMET CHEM, V378, P375 HO JW, 1991, ORGANOMETALLICS, V10, P3001 HO JW, 1994, INORG CHEM, V33, P865 HOFFMAN PR, 1975, INORG CHEM, V14, P1997 HOSKIN AJ, 2001, ANGEW CHEM, V113, P1917 HOU ZM, 1993, ORGANOMETALLICS, V12, P3158 INAGAKI Y, 1980, B CHEM SOC JPN, V53, P205 ISSLEIB K, 1972, ANGEW CHEM, V84, P582 ISSLEIB K, 1987, J ORGANOMET CHEM, V330, P17 JACOBSEN EN, 1988, J AM CHEM SOC, V110, P1968 KATSUKI T, 1980, J AM CHEM SOC, V102, P5974 KAUFFMANN T, 1984, TETRAHEDRON LETT, V25, P1963 KAUFFMANN T, 1985, CHEM BER, V118, P1022 KITAMURA M, 1988, J AM CHEM SOC, V110, P629 KNOWLES WS, 1983, ACCOUNTS CHEM RES, V16, P106 KOEPF H, 1981, CHEM BER, V114, P2731 KOHLER EP, 1935, J AM CHEM SOC, V57, P367 KYBA EP, 1983, ORGANOMETALLICS, V2, P1877 MILLER AR, 1976, J AM CHEM SOC, V98, P1860 MILLER SJ, 1996, J AM CHEM SOC, V118, P9606 MIYASHITA A, 1980, J AM CHEM SOC, V102, P7932 MURDZEK JS, 1987, ORGANOMETALLICS, V6, P1373 NGUYEN ST, 1992, J AM CHEM SOC, V114, P3974 NGUYEN ST, 1993, J AM CHEM SOC, V115, P9858 NOVAK BM, 1988, J AM CHEM SOC, V110, P960 OHKUMA T, 1995, J AM CHEM SOC, V117, P2675 OHTA T, 1988, INORG CHEM, V27, P566 OSHIKAWA T, 1985, CHEM IND-LONDON, P126 ROCKLAGE SM, 1981, J AM CHEM SOC, V103, P1440 SCHOLL M, 1999, TETRAHEDRON LETT, V40, P2247 SCHROCK RR, 1974, J AM CHEM SOC, V96, P6796 SCHROCK RR, 1980, J MOL CATAL, V8, P73 SCHROCK RR, 1988, J MOL CATAL, V46, P243 SCHROCK RR, 1990, J AM CHEM SOC, V112, P3875 SCHWAB P, 1995, ANGEW CHEM INT EDIT, V34, P2039 SCHWAB P, 1995, ANGEW CHEM, V107, P2179 SCHWAB P, 1996, J AM CHEM SOC, V118, P100 SENDERIKHIN AI, 1988, ZH OBSHCH KHIM+, V58, P1662 SENDERIKHIN AI, 1989, ZH OBSHCH KHIM+, V59, P2141 SEYFERTH D, 1969, J ORG CHEM, V34, P1483 SHELDRICK GM, 2000, SHELXTL SHU RH, 1998, J AM CHEM SOC, V120, P12988 SMIT CN, 1983, TETRAHEDRON LETT, V24, P2031 SOUFFLET JP, 1973, CR ACAD SCI C CHIM, V276, P169 STEPHAN DW, 2000, ANGEW CHEM, V112, P322 STEPHAN DW, 2005, ORGANOMETALLICS, V24, P2548 STRADIOTTO M, 2001, HELV CHIM ACTA, V84, P2958 TILLEY TD, 1990, COMMENTS INORG CHEM, V10, P37 TILLEY TD, 1993, ACCOUNTS CHEM RES, V26, P22 TVERDOMED SN, 2003, RUSS J GEN CHEM+, V73, P319 VANDENWINKEL Y, 1991, J ORGANOMET CHEM, V405, P183 WATERMAN R, 2006, ANGEW CHEM INT EDIT, V45, P2926 WATERMAN R, 2006, ANGEW CHEM, V118, P2992 WEAST RC, 1974, HDB CHEM PHYS, P2436 WOOD CD, 1979, J AM CHEM SOC, V101, P3210 WU Z, 1995, J AM CHEM SOC, V117, P5503 XIN SX, 1997, J AM CHEM SOC, V119, P5307; NR: 85; TC: 0; J9: CHEM-EUR J; PG: 12; GA: 113PJSource type: Electronic(1
- …
