176
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Sulik B, Ricz S, Kádár I, Xiao G, Schiwietz G, Sommer K, Grande P, Köhrbrück R, Grether M, Stolterfoht N. Dominant two-center electron-electron interactions in collisions of 120-MeV Ne6+ ions with gas targets. PHYSICAL REVIEW. A, ATOMIC, MOLECULAR, AND OPTICAL PHYSICS 1995; 52:387-391. [PMID: 9912259 DOI: 10.1103/physreva.52.387] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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177
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Wang JQ, Xiao G. Large finite-size effect of giant magnetoresistance in magnetic granular thin films. PHYSICAL REVIEW. B, CONDENSED MATTER 1995; 51:5863-5867. [PMID: 9979498 DOI: 10.1103/physrevb.51.5863] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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178
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Fu W, Xiao G, Yu P. [Establishment of hybridoma lines and protective study of monoclonal antibodies against lipid A of endotoxins]. ZHONGHUA YI XUE ZA ZHI 1995; 75:159-60, 190-1. [PMID: 7780823] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
For developing monoclonal antibodies (MAb) that bound to lipid A of the LPS molecule, we established several hybridomas cell lines by fusion of SP2/0 and spleen cells from BALB/c mice immunized by J5 mutant strain of E. coli 0111:B4. Each MAb exhibited a high titer by ELISA assay. Six of MAb were of immunoglobulin G isotype and another one immunoglobulin M. All of these MAb demonstrated different capacity to cross-react with several gram-negative bacteria and their endotoxins. Among them, 9G6 MAb improved the survival rate of mice significantly when administered 2 hours before the challenge by pseudomonas A and E. coli. These findings suggest that MAb will probably be useful in the treatment of sepsis caused by a wide variety of gram-negative bacteria.
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179
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Aldaz CM, Yeung RS, Latif F, Lerman MI, Xiao G, Trono D, Walker CL. Colocalization of the rat homolog of the von Hippel Lindau (Vhl) gene and the plasma membrane Ca++ transporting ATPase isoform 2 (Atp2b2) gene to rat chromosome bands 4q41.3-->42.1. CYTOGENETICS AND CELL GENETICS 1995; 71:253-6. [PMID: 7587388 DOI: 10.1159/000134121] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Using fluorescence in situ hybridization, we localized the rat homolog of the von Hippel-Lindau gene (Vhl) to rat chromosome band 4q41.3-->q42.1. We also mapped the gene encoding the plasma membrane Ca(++)-transporting ATPase isoform 2(Atp2b2) to the same chromosome subregion. These two genes together with Raf1 appear to be members of a large syntenic gene cluster that maps to human chromosome bands 3p25-->p26, mouse chromosome bands 6 C3-->E, and rat chromosome bands 4q41-->q42. Cytogenetic analysis of NRK 52E cells derived from immortalized normal rat kidney epithelial cells revealed an inverted duplication of the region containing this gene cluster.
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180
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Chen W, Lu Y, Maris HJ, Xiao G. Picosecond ultrasonic study of localized phonon surface modes in Al/Ag superlattices. PHYSICAL REVIEW. B, CONDENSED MATTER 1994; 50:14506-14515. [PMID: 9975673 DOI: 10.1103/physrevb.50.14506] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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181
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Zong G, Xiao G, Zhang Y. [Prophylactic effect of systemic ceftazidime on bacterial translocation in scalded rats]. ZHONGHUA ZHENG XING SHAO SHANG WAI KE ZA ZHI = ZHONGHUA ZHENG XING SHAO SHANG WAIKF [I.E. WAIKE] ZAZHI = CHINESE JOURNAL OF PLASTIC SURGERY AND BURNS 1994; 10:456-458. [PMID: 7720006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
In this study, we evaluated the prophylactic effect of Ceftazidime on bacterial translocation (BT) of Pseudomonas aeruginosa in scalded rat by qualitative and quantitative bacterial cultures of blood, organs and mesenteric lymph nodes (MLN). Ceftazidi-me was administered systemically at 3 h, 6 h and 12 h post injury respectively. The dynamic changes in levels of Ceftazidime in blood and organ tissues were also determined. The results showed that effective levels of Ceftazidime in blood, liver and mucosa of the small intestine were rapidly reached and maintained for more than 4 h, but no drug was found in MLN. The prophylactic effect on BT was significant when systemic administration started at 3 h post injury (P < 0.001) and 6 h post injury (P < 0.05). Although the incidence of BT was unchanged (P > 0.05) when systemic administration started at 12 h, the number of organisms present in livers and kidneys, except MLN, was dramatically reduced (P < 0.01).
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182
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Wang JQ, Xiao G. Erratum: Transition-metal granular solids: Microstructure, magnetic properties, and giant magnetoresistance. PHYSICAL REVIEW. B, CONDENSED MATTER 1994; 50:9692. [PMID: 9975045 DOI: 10.1103/physrevb.50.9692] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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183
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Zong G, Xiao G, Zhang Y. [The pharmacokinetics of ceftazidime in the burned patients]. ZHONGHUA ZHENG XING SHAO SHANG WAI KE ZA ZHI = ZHONGHUA ZHENG XING SHAO SHANG WAIKF [I.E. WAIKE] ZAZHI = CHINESE JOURNAL OF PLASTIC SURGERY AND BURNS 1994; 10:385-388. [PMID: 7712387] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Pharmacokinetic studies were carried out following systemic administration of ceftazidime in ten burn patients (TBSA 30%-60% and with full-thickness burn) and six healthy volunteers. Dynamic ceftazidime concentrations in blood, urine and blister fluid were analysed by HPLC. The results showed that the burned patients, especially during their shock phase, some pharmacokinetics parameters differed from that of normal volunteers, in that the volume of distribution (0.45 +/- 0.06 L/kg vs. 0.23 +/- 0.05 L/kg) and non-renal clearance of drug (30.54 +/- 21.97ml.min-1 vs. 11.08 +/- 4.91 ml.min-1) increased, but the elimination of half-life was prolonged. The result indicated that it was not necessary to increase the dosage of ceftazidime in extensive burns in the early period. Burn blister fluid concentrations were higher than MIC. Ranging from 1.004-21.62 micrograms/ml, indicating that systemic ceftazidime could penetrate second-degree burn tissue in the early postburn stage.
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184
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Wang JQ, Xiao G. Origin of the temperature dependence of the giant magnetoresistance in magnetic granular solids. PHYSICAL REVIEW. B, CONDENSED MATTER 1994; 50:3423-3426. [PMID: 9976602 DOI: 10.1103/physrevb.50.3423] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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185
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Tang H, Hicken RJ, Walker JC, Xiao G. Intrinsic magnetic properties of ultrathin amorphous Fe70B30/Ag multilayers. PHYSICAL REVIEW. B, CONDENSED MATTER 1994; 49:3625-3628. [PMID: 10011241 DOI: 10.1103/physrevb.49.3625] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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186
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Wang JQ, Xiao G. Transition-metal granular solids: Microstructure, magnetic properties, and giant magnetoresistance. PHYSICAL REVIEW. B, CONDENSED MATTER 1994; 49:3982-3996. [PMID: 10011294 DOI: 10.1103/physrevb.49.3982] [Citation(s) in RCA: 76] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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187
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Xiao G, Hua BJ, Yang JS, Wang JM. Environmental effects on the bondability of O2 plasma treated polyolefins. ACTA ACUST UNITED AC 1994. [DOI: 10.1007/bf00571776] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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188
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Xiong P, Xiao G, Laibowitz RB. Subgap and above-gap differential resistance anomalies in superconductor-normal-metal microjunctions. PHYSICAL REVIEW LETTERS 1993; 71:1907-1910. [PMID: 10054530 DOI: 10.1103/physrevlett.71.1907] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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189
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Xiao G, van der Helm D, Goerlitz FH, Hider RC, Dobbin PS. Structures of 3-hydroxy-1-(2-methoxyethyl)-2-methyl-4-pyridinone, its hydrochloride and 1-ethyl-3-hydroxy-2-methyl-4-pyridinone hydrochloride hydrate. Acta Crystallogr C 1993; 49 ( Pt 9):1646-9. [PMID: 8217022 DOI: 10.1107/s0108270193001313] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023] Open
Abstract
3-Hydroxy-1-(2-methoxyethyl)-2-methyl-4(1H)-pyridinone (1) exists mainly in the quinoid form with a small contribution from the aromatic zwitterion form, while 3-hydroxy-1-(2-methoxyethyl)-2-methyl-4(1H)-pyridinone hydrochloride (2) and 1-ethyl-3-hydroxy-2-methyl-4(1H)-pyridinone hydrochloride hydrate (3) are observed to occur in the aromatic form with a minor contribution from the quinoid resonance form. Different substituents at the ring N position do not have significant geometric effects in either the neutral molecules, as a group, or in the hydrochloride salts.
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190
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Dobbin PS, Hider RC, Hall AD, Taylor PD, Sarpong P, Porter JB, Xiao G, van der Helm D. Synthesis, physicochemical properties, and biological evaluation of N-substituted 2-alkyl-3-hydroxy-4(1H)-pyridinones: orally active iron chelators with clinical potential. J Med Chem 1993; 36:2448-58. [PMID: 8355246 DOI: 10.1021/jm00069a002] [Citation(s) in RCA: 188] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
The synthesis of a range of novel bidentate ligands containing the chelating moiety 3-hydroxy-4(1H)-pyridinone is described. The pKa values of the ligands and the stability constants of their iron(III) complexes have been determined. The crystal structures of one of the ligands and one of the iron(III) complexes are presented. The distribution coefficients of the ligands are reported and are related to the ability of the ligands to remove iron from hepatocytes. The influence of 3-hydroxy-4(1H)-pyridinones on oxidative damage to cells is described. In contrast to the iron chelator in current therapeutic use, desferrioxamine-B, many of the bidentate ligands described in this study are orally active in iron-overloaded mice.
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191
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Cieplak MZ, Sienkiewicz A, Mila F, Guha S, Xiao G, Xiao JQ, Chien CL. Spin dynamics in the La1.85Sr0.15Cu1-xFexO4 system probed by ESR. PHYSICAL REVIEW. B, CONDENSED MATTER 1993; 48:4019-4029. [PMID: 10008852 DOI: 10.1103/physrevb.48.4019] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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192
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Xiao G, Van Der Helm D, Hider RC, Dobbin PS. 3-[1-(Ethylamino)ethylidene]-6-methyl-3H-pyran-2,4-dione. Acta Crystallogr C 1993; 49 ( Pt 5):980-2. [PMID: 8347307 DOI: 10.1107/s0108270192010928] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023] Open
Abstract
The structural results clearly indicate that 3-[1-(ethylamino)ethylidene]-6-methyl-3H-pyran-2,4-dione exists as a keto-enamine tautomer in the solid state. The H atom bonded to N(9) refines with a normal temperature factor and the bond distance of the keto group [C(4)--O(13)] of 1.263 (1) A is elongated due to resonance. This resonance is also indicated by an averaging of the single bonds [C(2)--C(3), C(3)--C(4), C(4)--C(5) and C(8)--N(9)] and double bonds [C(3)--C(8) and C(4)--O(13)] in the crystal structure and by the fact that not only is the pyran ring planar [r.m.s. deviation 0.0212 (9) A] but also there is planarity for the whole molecule [r.m.s. deviation 0.074 (1) A]. A strong intramolecular hydrogen bond is found between the 4-oxo group and the amine H atom.
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193
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Wang JQ, Xiong P, Xiao G. Investigation of giant magnetoresistance in magnetic, concentrated, nanostructured alloys. PHYSICAL REVIEW. B, CONDENSED MATTER 1993; 47:8341-8344. [PMID: 10004862 DOI: 10.1103/physrevb.47.8341] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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194
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Xiong P, Xiao G, Wu XD. Hall angle in YBa2Cu3O7- delta epitaxial films: Comparison between oxygen reduction and Pr doping. PHYSICAL REVIEW. B, CONDENSED MATTER 1993; 47:5516-5519. [PMID: 10006734 DOI: 10.1103/physrevb.47.5516] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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195
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Xiong P, Xiao G, Wang JQ, Xiao JQ, Jiang JS, Chien CL. Extraordinary Hall effect and giant magnetoresistance in the granular Co-Ag system. PHYSICAL REVIEW LETTERS 1992; 69:3220-3223. [PMID: 10046761 DOI: 10.1103/physrevlett.69.3220] [Citation(s) in RCA: 28] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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196
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Xiao G, Xiong P, Cieplak MZ. Universal Hall effect in La1.85Sr0.15Cu1-xAxO4 systems (A=Fe,Co,Ni,Zn,Ga). PHYSICAL REVIEW. B, CONDENSED MATTER 1992; 46:8687-8690. [PMID: 10002654 DOI: 10.1103/physrevb.46.8687] [Citation(s) in RCA: 25] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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197
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Cieplak MZ, Guha S, Kojima H, Lindenfeld P, Xiao G, Xiao JQ, Chien CL. Metal-insulator transition in La1.85Sr0.15CuO4 with various substitutions for Cu. PHYSICAL REVIEW. B, CONDENSED MATTER 1992; 46:5536-5547. [PMID: 10004340 DOI: 10.1103/physrevb.46.5536] [Citation(s) in RCA: 28] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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198
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Xue DP, Xiao G. Magnetotransport properties of two-dimensional electron gases under a periodic magnetic field. PHYSICAL REVIEW. B, CONDENSED MATTER 1992; 45:5986-5990. [PMID: 10000340 DOI: 10.1103/physrevb.45.5986] [Citation(s) in RCA: 42] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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199
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Singh A, Teanovic Z, Tang H, Xiao G, Chien CL, Walker JC. Singh et al. reply. PHYSICAL REVIEW LETTERS 1991; 67:1939. [PMID: 10044293 DOI: 10.1103/physrevlett.67.1939] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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200
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Zhu C, Xiao G. An analysis of the life cycle of Chinese women. CHINESE JOURNAL OF POPULATION SCIENCE 1991; 3:247-57. [PMID: 12285526] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/19/2023]
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