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Chen X, Gao XP, Zhang H, Zhou Z, Hu WK, Pan GL, Zhu HY, Yan TY, Song DY. Preparation and Electrochemical Hydrogen Storage of Boron Nitride Nanotubes. J Phys Chem B 2005; 109:11525-9. [PMID: 16852412 DOI: 10.1021/jp050105u] [Citation(s) in RCA: 105] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Boron nitride (BN) nanotubes were synthesized through chemical vapor deposition over a wafer made by a LaNi5/B mixture and nickel powder at 1473 K. Scanning electron microscopy, transmission electron microscopy, energy-dispersive spectroscopy, X-ray diffraction, and X-ray photoelectron spectroscopy were performed to characterize the microstructure and composition of BN nanotubes. It was found that the obtained BN nanotubes were straight with a diameter of 30-50 nm and a length of up to several microns. We first verify that the BN nanotubes can storage hydrogen by means of an electrochemical method, though its capacity is low at present. The hydrogen desorption of nonelectrochemical recombination in cyclic voltammograms, which is considered as the slow reaction at BN nanotubes, suggests the possible existence of strong chemisorption of hydrogen, and it may lead to the lower discharge capacity of BN nanotubes. It is tentatively concluded that the improvement of the electrocatalytic activity by surface modification with metal or alloy would enhance the electrochemical hydrogen storage capacity of BN nanotubes.
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Affiliation(s)
- X Chen
- Institute of New Energy Material Chemistry, Department of Materials Chemistry, N & T Joint Academy, Nankai University, Tianjin 300071, China
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Gao XP, Bao JL, Pan GL, Zhu HY, Huang PX, Wu F, Song DY. Preparation and Electrochemical Performance of Polycrystalline and Single Crystalline CuO Nanorods as Anode Materials for Li Ion Battery. J Phys Chem B 2004. [DOI: 10.1021/jp037075k] [Citation(s) in RCA: 517] [Impact Index Per Article: 25.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- X. P. Gao
- Institute of New Energy Chemistry Material, Nankai University, Tianjin 300071, China, State Key Laboratory of Functional Polymer Materials for Adsorption and Separation, Nankai University, Tianjin 300071, China, Electron Microscope Unit and School of Chemistry, The University of Sydney, NSW 2006, Australia, and School of Chemical Engineering and Environmental, Beijing Institute of Technology, Beijing 100081, China
| | - J. L. Bao
- Institute of New Energy Chemistry Material, Nankai University, Tianjin 300071, China, State Key Laboratory of Functional Polymer Materials for Adsorption and Separation, Nankai University, Tianjin 300071, China, Electron Microscope Unit and School of Chemistry, The University of Sydney, NSW 2006, Australia, and School of Chemical Engineering and Environmental, Beijing Institute of Technology, Beijing 100081, China
| | - G. L. Pan
- Institute of New Energy Chemistry Material, Nankai University, Tianjin 300071, China, State Key Laboratory of Functional Polymer Materials for Adsorption and Separation, Nankai University, Tianjin 300071, China, Electron Microscope Unit and School of Chemistry, The University of Sydney, NSW 2006, Australia, and School of Chemical Engineering and Environmental, Beijing Institute of Technology, Beijing 100081, China
| | - H. Y. Zhu
- Institute of New Energy Chemistry Material, Nankai University, Tianjin 300071, China, State Key Laboratory of Functional Polymer Materials for Adsorption and Separation, Nankai University, Tianjin 300071, China, Electron Microscope Unit and School of Chemistry, The University of Sydney, NSW 2006, Australia, and School of Chemical Engineering and Environmental, Beijing Institute of Technology, Beijing 100081, China
| | - P. X. Huang
- Institute of New Energy Chemistry Material, Nankai University, Tianjin 300071, China, State Key Laboratory of Functional Polymer Materials for Adsorption and Separation, Nankai University, Tianjin 300071, China, Electron Microscope Unit and School of Chemistry, The University of Sydney, NSW 2006, Australia, and School of Chemical Engineering and Environmental, Beijing Institute of Technology, Beijing 100081, China
| | - F. Wu
- Institute of New Energy Chemistry Material, Nankai University, Tianjin 300071, China, State Key Laboratory of Functional Polymer Materials for Adsorption and Separation, Nankai University, Tianjin 300071, China, Electron Microscope Unit and School of Chemistry, The University of Sydney, NSW 2006, Australia, and School of Chemical Engineering and Environmental, Beijing Institute of Technology, Beijing 100081, China
| | - D. Y. Song
- Institute of New Energy Chemistry Material, Nankai University, Tianjin 300071, China, State Key Laboratory of Functional Polymer Materials for Adsorption and Separation, Nankai University, Tianjin 300071, China, Electron Microscope Unit and School of Chemistry, The University of Sydney, NSW 2006, Australia, and School of Chemical Engineering and Environmental, Beijing Institute of Technology, Beijing 100081, China
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Gao XP, Zheng ZF, Zhu HY, Pan GL, Bao JL, Wu F, Song DY. Rotor-like ZnO by epitaxial growth under hydrothermal conditionsElectronic supplementary information (ESI) available: TEM images of the rod-like and rotor-like ZnO in the bright field and dark field. See http://www.rsc.org/suppdata/cc/b4/b403252g/. Chem Commun (Camb) 2004:1428-9. [PMID: 15179498 DOI: 10.1039/b403252g] [Citation(s) in RCA: 100] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Rotor-like ZnO was grown from a mixture of rod-like ZnO powder and a saturated Zn(OH)(4)(2-) solution under moderate hydrothermal conditions at 100 degree C, in which the precursor rod-like ZnO crystal plane acts as a matrix core, and the branched nanorods showed fast epitaxial growth on the six directions around the prism core.
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Affiliation(s)
- X P Gao
- Institute of New Energy Material Chemistry, Nankai University, Tianjin 300071, China.
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Pan GL, Fan MG, Fan P, Wang HZ, Wei ZC. Enhancement of a two-photon absorption cross section (TPACS)--design and synthesis of a novel class of photochromic molecules with large TPACS. Chem Commun (Camb) 2001:1744-5. [PMID: 12240294 DOI: 10.1039/b102876f] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Two novel photochromic compounds were designed and synthesized; the two-photon absorption (TPA) cross section of both were measured with a nanosecond laser pulse; their TPACS (delta) values are around 25 x 10(-46) cm4 s photon-1 molecule-1 in acetonitrile; the molecular structure of the target compounds have a 3-methyl-1-benzothiophen-2-yl moiety, which can greatly enhance the two-photon absorption cross section.
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Affiliation(s)
- G L Pan
- Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100101, People's Republic of China
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Niles JL, Pan GL, Collins AB, Shannon T, Skates S, Fienberg R, Arnaout MA, McCluskey RT. Antigen-specific radioimmunoassays for anti-neutrophil cytoplasmic antibodies in the diagnosis of rapidly progressive glomerulonephritis. J Am Soc Nephrol 1991; 2:27-36. [PMID: 1655091 DOI: 10.1681/asn.v2127] [Citation(s) in RCA: 69] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
Circulating anti-neutrophil cytoplasmic antibodies (ANCA) have been described in most patients with "pauci-immune" necrotizing and crescentic glomerulonephritis. A 29-kDa serine protease (p29 or proteinase 3) and myeloperoxidase are the two best characterized antigens recognized by ANCA. The study presented here was conducted to define the diagnostic value of assays for antibodies against these two antigens in rapidly progressive glomerulonephritis. Radioimmunoassays were developed for anti-p29 and anti-myeloperoxidase antibodies, with purified antigens, and the results of the radioimmunoassays were compared with those obtained by immunofluorescence tests for ANCA. We performed assays on serum samples from 123 patients with the syndrome of rapidly progressive glomerulonephritis, as well as from 200 blood bank donors and from 717 additional control patients. Without knowledge of the results of ANCA tests, the renal pathologic findings in the 123 patients with rapidly progressive glomerulonephritis were analyzed, and 42 were classified as pauci-immune necrotizing and crescentic glomerulonephritis, 18 were classified as anti-glomerular basement membrane nephritis and 63 were classified as other forms of renal disease. We found radioimmunoassays to be more reliable in the diagnosis of pauci-immune necrotizing and crescentic glomerulonephritis than immunofluorescence testing. By radioimmunoassay, ANCA were found in 40 of 42 patients (95% sensitivity) with pauci-immune necrotizing and crescentic glomerulonephritis (14 with anti-p29 and 26 with anti-myeloperoxidase antibodies). The tests for antibodies to p29 and myeloperoxidase were 99.9 and 99.5% specific for pauci-immune necrotizing and crescentic glomerulonephritis, respectively. In the setting of rapidly progressive glomerulonephritis, a positive radioimmunoassay for anti-p29 or anti-myeloperoxidase antibodies (together with a negative test for anti-GBM antibodies) gives a probability of pauci-immune necrotizing and crescentic glomerulonephritis of over 99%.
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Affiliation(s)
- J L Niles
- Department of Medicine, Massachusetts General Hospital, Boston 02114
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Shao YF, Pan GL, Zhou CN, Yu HT. [Squamous cell carcinoma of the ascending colon--a case report and review of literature]. Zhonghua Zhong Liu Za Zhi 1987; 9:315-6. [PMID: 3315530] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
One case of squamous cell carcinoma of the ascending colon is reported. The patient, a sixty two year old woman, was admitted because of right abdominal pain for three months. A mass, 6 X 5 cm in size, was palpated. 13 cm colonic mucosa destruction was shown by barium enema. Right hemicolectomy was done. A squamous cell carcinoma of the ascending colon was diagnosed by light and electron microscope. Squamous cell carcinoma of the colon is rare. Squamous cell carcinoma and adenoacanthoma, occurring in the colon and upper rectum, comprise 0.5% of all colonic malignancies. 18 cases have been collected in the literature and this case is the first one reported in China. Etiology of squamous cell carcinoma of the large bowel is reviewed.
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Affiliation(s)
- Y F Shao
- Cancer Institute, Chinese Academy of Medical Sciences, Beijing
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