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The binding sites for Escherichia coli RNA polymerase on lambda phage DNA: Characteristics of binding sites on sonicated lambda DNA.

FEBS letters

Nakano E, Sakaguchi K.
PMID: 11945740
FEBS Lett. 1971 Apr 30;14(3):139-142. doi: 10.1016/0014-5793(71)80088-1.

No abstract available.

Development of a new enzyme-linked immunosorbent assay for the detection of anti-M2 in primary biliary cirrhosis.

Hepatology research : the official journal of the Japan Society of Hepatology

Jong-Hon K, Yajima R, Karino Y, Yoshida J, Tsuji K, Watanabe S, Horada K, Itoh Y, Sekiguchi K, Toyoda S, Maekubo H.
PMID: 11470623
Hepatol Res. 2001 Sep;21(1):1-7. doi: 10.1016/s1386-6346(01)00075-4.

We developed a new enzyme-linked immunosorbent assay (ELISA) for the detection of antimitochondrial antibody (AMA)-M2 in sera from patients with primary biliary cirrhosis (PBC), using 2-oxo-acid dehydrogenase complex (2-OADC) purified from porcine myocardium as the antigen source. The immunoreactivity...

Collision-induced dissociation spectra versus collision energy (collision-induced dissociation curve) using a quadrupole ion trap mass spectrometer. II.(1) loss of CO from ionized o-, m- and p-anisoyl fluoride, CH(3)OC(6)H(4)COF(+.).

Journal of mass spectrometry : JMS

Tajima S, Siang LF, Fujishige M, Nakajima S, Sekiguchi O.
PMID: 11006609
J Mass Spectrom. 2000 Sep;35(9):1144-6. doi: 10.1002/1096-9888(200009)35:9<1144::AID-JMS43>3.0.CO;2-Q.

No abstract available.

Stepwise charge separation and charge recombination in ferrocene-meso,meso-linked porphyrin dimer-fullerene triad.

Journal of the American Chemical Society

Imahori H, Tamaki K, Araki Y, Sekiguchi Y, Ito O, Sakata Y, Fukuzumi S.
PMID: 11982381
J Am Chem Soc. 2002 May 08;124(18):5165-74. doi: 10.1021/ja016655x.

A meso,meso-linked porphyrin dimer [(ZnP)(2)] as a light-harvesting chromophore has been incorporated into a photosynthetic multistep electron-transfer model for the first time, including ferrocene (Fc), as an electron donor and fullerene (C(60)) as an electron acceptor to construct the...

Isolable silyl and germyl radicals lacking conjugation with pi-bonds: synthesis, characterization, and reactivity.

Journal of the American Chemical Society

Sekiguchi A, Fukawa T, Nakamoto M, Lee VY, Ichinohe M.
PMID: 12175246
J Am Chem Soc. 2002 Aug 21;124(33):9865-9. doi: 10.1021/ja0126780.

The one-electron oxidation reaction of tris[di-tert-butyl(methyl)silyl]silyl and -germyl anions with dichlorogermylene-dioxane complex results in the formation of stable tris[di-tert-butyl(methyl)silyl]silyl and -germyl radicals 1 and 2, representing the first isolable radical species of heavier Group 14 elements lacking stabilization by...

1,4,5-trigermabicyclo[2.1.0]pent-2-en-5-ylium: the isolable bishomocyclopropenylium ion containing a heavier group 14 element.

Journal of the American Chemical Society

Ishida Y, Sekiguchi A, Kabe Y.
PMID: 13129328
J Am Chem Soc. 2003 Sep 24;125(38):11468-9. doi: 10.1021/ja030327a.

The isolable bishomoaromatic cation containing a heavier Group 14 element, (2,3,5-deloc)-2-phenyl-1,4,5-tris(tri-tert-butylsilyl)-1,4,5-trigermabicyclo[2.1.0]pent-2-en-5-ylium TPFPB- (2+.TPFPB-; TPFPB- = tetrakis(pentafluorophenyl)borate) was synthesized by the reaction of 5-bromo-2-phenyl-1,4,5-tris(tri-tert-butylsilyl)-1,4,5-trigermabicyclo[2.1.0]pent-2-ene (1) with [Et3Si(benzene)]+.TPFPB- in benzene at room temperature. The characteristic bishomoaromatic structure was unambiguously determined by...

Observation of the predicted negative Faraday A MCD term in a cyclobutadiene dianion.

Journal of the American Chemical Society

Ishii K, Kobayashi N, Matsuo T, Tanaka M, Sekiguchi A.
PMID: 11457402
J Am Chem Soc. 2001 Jun 06;123(22):5356-7. doi: 10.1021/ja004285r.

No abstract available.

The first silastannene >si=sn<: a new doubly-bonded system of heavier group 14 elements.

Journal of the American Chemical Society

Sekiguchi A, Izumi R, Lee VY, Ichinohe M.
PMID: 12475304
J Am Chem Soc. 2002 Dec 18;124(50):14822-3. doi: 10.1021/ja021077l.

The reaction of bis[di-tert-butyl(methyl)silyl]dilithiosilane 1 with dichlorobis(2,4,6-triisopropylphenyl)stannane in THF at room temperature yielded highly air- and moisture-sensitive deep violet crystals of 1,1-bis[di-tert-butyl(methyl)silyl]-2,2-bis(2,4,6-triisopropylphenyl)-1-sila-2-stannaethene 2 with a Si=Sn double bond. The molecular structure of 2 was established by X-ray crystallography, which...

Tin-centered radical and cation: stable and free.

Journal of the American Chemical Society

Sekiguchi A, Fukawa T, Lee VY, Nakamoto M.
PMID: 12889927
J Am Chem Soc. 2003 Aug 06;125(31):9250-1. doi: 10.1021/ja030156+.

The first stable stannyl radical (tBu2MeSi)3Sn* (1) has been synthesized by the reaction of tBu2MeSiNa with SnCl2-dioxane in diethyl ether. The X-ray crystal structure and electron paramagnetic resonance (EPR) data of this radical show that 1 has a planar...

Radical cytoreductive surgery combined with platinums-carboplatin and cisplatin chemotherapy for advanced ovarian cancer.

International journal of gynecological cancer : official journal of the International Gynecological Cancer Society

Suzuki M, Ohwara M, Sekiguchi I, Sato I.
PMID: 11240743
Int J Gynecol Cancer. 1999 Jan;9(1):54-60. doi: 10.1046/j.1525-1438.1999.09890.x.

In an attempt to improve the therapeutic outcome for patients with advanced ovarian cancer, primary radical cytoreductive surgery consisting of hysterectomy, bilateral salpingo-oophorectomy, omentectomy and retroperitoneal lymph node resection, with optimal cytoreduction in case of metastatic lesions, was followed...

Unimolecular metastable decompositions of gem-dimethoxyalkanes (RR'C(OCH(3))(2)) upon electron impact. I. Dimethoxymethane and 1, 1-dimethoxyethane.

Rapid communications in mass spectrometry : RCM

Takahashi Y, Higuchi T, Sekiguchi O, Fujizuka A, Nakajima S, Tajima S.
PMID: 10623930
Rapid Commun Mass Spectrom. 2000;14(2):61-7. doi: 10.1002/(SICI)1097-0231(20000130)14:2<61::AID-RCM834>3.0.CO;2-J.

The unimolecular metastable decompositions of dimethoxymethane (CH(2)(OCH(3))(2), 1) and 1,1-dimethoxyethane (CH(3)CH(OCH(3))(2), 2) upon electron impact have been investigated by means of mass-analyzed ion kinetic energy (MIKE) spectrometry, collision-induced dissociation (CID) spectrometry and D-labeling techniques. Both molecular ions are formed...

Enantioselective ring cleavage of dioxane acetals mediated by a chiral Lewis acid: application to asymmetric desymmetrization of meso-1,3-diols.

Organic letters

Harada T, Sekiguchi K, Nakamura T, Suzuki J, Oku A.
PMID: 11594821
Org Lett. 2001 Oct 18;3(21):3309-12. doi: 10.1021/ol0165286.

[reaction: see text]. Phenylalanine-derived B-aryl-N-tosyloxazaborolidinones selectively activate one of two enantiotopic oxygen atoms in prochiral anti dioxane acetals derived from meso-1,3-diols, leading to enantioselective formation of ring-cleavage products. The reaction is utilized as a key step in asymmetric desymmetrization...

Showing 25 to 36 of 1097 entries