51
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Masunaga H, Sasaki K, Akiba I. Convenient method for removing and concentrating hydrophobic organic compounds from water with amphiphilic polymers. J Appl Polym Sci 2006. [DOI: 10.1002/app.23871] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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52
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Yamada M, Yokota M, Kaya M, Satoh S, Jonganurakkun B, Nomizu M, Nishi N. Preparation of novel bio-matrix by the complexation of DNA and metal ions. POLYMER 2005. [DOI: 10.1016/j.polymer.2005.07.086] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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53
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Yang K, Liu Z, Mao M, Zhang X, Zhao C, Nishi N. Molecularly imprinted polyethersulfone microspheres for the binding and recognition of bisphenol A. Anal Chim Acta 2005; 546:30-36. [DOI: 10.1016/j.aca.2005.05.008] [Citation(s) in RCA: 64] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2005] [Revised: 04/27/2005] [Accepted: 05/03/2005] [Indexed: 11/29/2022]
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54
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Liu XD, Murayama Y, Matsunaga M, Nomizu M, Nishi N. Preparation and characterization of DNA hydrogel bead as selective adsorbent of dioxins. Int J Biol Macromol 2005; 35:193-9. [PMID: 15811474 DOI: 10.1016/j.ijbiomac.2005.01.008] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2004] [Revised: 12/07/2004] [Accepted: 01/31/2005] [Indexed: 10/25/2022]
Abstract
Salmon milt DNA hydrogel beads were synthesized by an inverse suspension polymerization of acrylamide in the continuous phase of cyclohexane. These DNA hydrogel beads in water medium are stable, more than 82% (w/w) of the DNA can be retained in the hydrogel after a sufficient soaking in water. Comparing with normal adsorbents such as activated carbon and alumina, this DNA matrix showed a selective adsorptivity for the dioxin derivatives with planar structure such as dibenzo-p-dioxin (DD), dibenzofuran (DF) and biphenyl (BP). Rinsing with hexane can regenerate the DNA beads after adsorption by the dioxin derivatives, even the adsorption-regeneration process repeated four times, no significant decrease in the dioxin removal capacity was observed.
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Affiliation(s)
- Xiang Dong Liu
- Graduate School of Environmental Earth Science, Hokkaido University, Sapporo 060-0810, Japan.
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55
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Satoh S, Fugetsu B, Nomizu M, Nishi N. Functional DNA–Silica Composite Prepared by Sol–Gel Method. Polym J 2005. [DOI: 10.1295/polymj.37.94] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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56
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Zhao C, Yang K, Wen X, Li F, Zheng B, Nomizu M, Nishi N. DNA-loaded porous polyethersulfone particles for environmental applications II. Utilization. J Appl Polym Sci 2005. [DOI: 10.1002/app.22336] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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57
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Zhao C, Sun S, Yang K, Nomizu M, Nishi N. DNA-loaded porous polyethersulfone particles for environmental applications I. preparation. J Appl Polym Sci 2005. [DOI: 10.1002/app.22335] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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58
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Zhao C, Wei Q, Yang K, Liu X, Nomizu M, Nishi N. Preparation of porous polysulfone beads for selective removal of endocrine disruptors. Sep Purif Technol 2004. [DOI: 10.1016/j.seppur.2004.03.007] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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59
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Fugetsu B, Satoh S, Shiba T, Mizutani T, Nodasaka Y, Yamazaki K, Shimizu K, Shindoh M, Shibata KI, Nishi N, Sato Y, Tohji K, Watari F. Large-Scale Production of Ba2+–Alginate-Coated Vesicles of Carbon Nanofibers for DNA-Interactive Pollutant Elimination. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2004. [DOI: 10.1246/bcsj.77.1945] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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60
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61
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Satoh S, Yamada M, Nomizu M, Nishi N. Accumulation-Exclusion Combined System for the DNA-Binding Harmful Chemicals with Insolubilized DNA. Polym J 2003. [DOI: 10.1295/polymj.35.872] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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62
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Zhao C, Liu X, Nomizu M, Nishi N. Blood compatible aspects of DNA-modified polysulfone membrane-protein adsorption and platelet adhesion. Biomaterials 2003; 24:3747-55. [PMID: 12818547 DOI: 10.1016/s0142-9612(03)00250-3] [Citation(s) in RCA: 88] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
DNA was used as a biomaterial to modify the polysulfone (PSf) membrane by blending it with PSf. The blood compatibility of the membranes was then investigated. The water contact angle decreased, and the hydrophilicity increased when a single strand DNA was blended with PSf. Because of the hydrophilic surface, the DNA-blended PSf membranes had a lower protein adsorption than the PSf membrane, but it was not significantly decreased due to the interaction between the DNA and proteins. Circular dichroism (CD) spectroscopy was used to examine the changes in the secondary structure of the proteins after adsorption onto the polymer surface and desorption from the polymer surface into the SDS solution. The conformation of the proteins adsorbed onto the PSf membrane and desorbed from the PSf membrane significantly changed, but that of the proteins for the DNA-blended PSf membranes differed only slightly from the native one. The number of platelets that adhered on the surface of the DNA-blended PSf membranes was reduced compared to that on the PSf membrane. This suggested that DNA can be regarded as a biopolymer to modify PSf, and contributes to the hydrophilic and hemocompatible wipers on the surface of the hydrophobic PSf membranes.
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Affiliation(s)
- Changsheng Zhao
- Division of Bioscience, Graduate School of Environmental Earth Science, Hokkaido University, Kita-ku, 060-0810, Sapporo, Japan
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63
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Liu XD, Murayama Y, Yamada M, Nomizu M, Matsunaga M, Nishi N. DNA aqueous solution used for dialytical removal and enrichment of dioxin derivatives. Int J Biol Macromol 2003; 32:121-7. [PMID: 12957308 DOI: 10.1016/s0141-8130(03)00045-x] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In the present study, a dialytic method that uses a DNA aqueous solution to remove and enrich dioxins from polluted water was proposed. Circular dichroism (CD) and fluorescent spectra indicated that dibenzo-p-dioxin (DD), dibenzofuran (DF) and biphenyl (BP), which are dioxin derivatives, form complexes with DNA. Their experimental dialytic sorption coefficients were measured by quantifying the concentrations of DD, DF, and BP in aqueous solutions before and after dialysis of the DNA solution, and the values were 2.1x10(5), 1.3x10(5), and 1.5x10(7), respectively. As a simulated water treatment model, DNA solution was dialyzed in an aqueous mixture of DD, DF, and BP for 96h, the HPLC studies showed that the dioxin derivatives have been concentrated in the DNA solution about 200 times. The dialyzed DNA solution was reusable by an extraction with hexane.
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Affiliation(s)
- Xiang Dong Liu
- Division of Bioscience, Graduate School of Environmental Earth Science, Hokkaido University, Sapporo, Japan
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64
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Douki T, Laporte G, Cadet J. Inter-strand photoproducts are produced in high yield within A-DNA exposed to UVC radiation. Nucleic Acids Res 2003; 31:3134-42. [PMID: 12799441 PMCID: PMC162242 DOI: 10.1093/nar/gkg408] [Citation(s) in RCA: 67] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Far-UV irradiation of DNA leads to the dimerization of pyrimidine bases, resulting in the formation of cyclobutane type dimers and (6-4) photoproducts. In the dry state, an additional thymine dimeric photolesion, the spore photoproduct, is also generated. While most photoproducts are expected to be produced between adjacent pyrimidines, little attention has been paid to lesions involving bases located on different DNA strands. Using HPLC- mass spectrometry analysis of enzymatically digested DNA, we observed that, in the dry state, inter-strand dimeric photoproducts represented 30% of the total yield of dimeric thymine lesions. The major inter-strand damage was found to be the spore photoproduct. Formation of inter-strand lesions in significant yield could be obtained in solution upon modification of the DNA conformation as the result of the addition of large amounts of ethanol. In both cases, DNA is in the A-form, which is characterized by a high compaction, likely to favor inter-strand photoreactions. Since the latter DNA conformation is also predominant in bacterial spores, the formation and repair of dimeric photoproducts involving thymine bases located on different DNA strands may thus be relevant in terms of deleterious effects of UV radiation to the latter microorganisms.
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Affiliation(s)
- Thierry Douki
- Laboratoire 'Lésions des Acides Nucléiques', Service de Chimie Inorganique et Biologique, FRE 2600, CEA/DSM/Département de Recherche Fondamentale sur la Matière Condensée, CEA-Grenoble, 17 Avenue des Martyrs, 38054 Grenoble Cedex 9, France.
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65
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Zhao C, Liu X, Rikimaru S, Nomizu M, Nishi N. Surface characterization of polysulfone membranes modified by DNA immobilization. J Memb Sci 2003. [DOI: 10.1016/s0376-7388(02)00524-0] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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66
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Yamada M, Nomizu M, Satoh S, Ohkawa K, Yamamoto H, Nishi N. DNA with gamma-aminopropyltriethoxysilane switches between B- and C-form structures under thermal control. Chembiochem 2003; 4:232-4. [PMID: 12616640 DOI: 10.1002/cbic.200390038] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Masanori Yamada
- Laboratory of Bio-Material Chemistry, Division of Bioscience, Graduate School of Environmental Earth Science, Hokkaido University, Kita-10, Nishi-5 Kita-ku, Sapporo 060-0810, Japan
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67
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Rikimaru S, Wakabayashi Y, Nomizu M, Nishi N. DNA-Chitosan Bilayer Membrane as a Bi-functional Biomedical Adhesive. Polym J 2003. [DOI: 10.1295/polymj.35.255] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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68
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Jonganurakkun B, Liu XD, Nodasaka Y, Nomizu M, Nishi N. Survival of lactic acid bacteria in simulated gastrointestinal juice protected by a DNA-based complex gel. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2003; 14:1269-81. [PMID: 14768913 DOI: 10.1163/156856203322553482] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Salmon milt DNA was utilized in the approach to protect functional materials, proteins, microorganisms, drugs, etc., by forming a DNA-based complex gel with gelatin and kappa-carrageenan. The multiplier effect of the combination of DNA, gelatin and kappa-carrageenan was examined by measuring the release of methyl orange from the gel after being incubated in simulated gastric juice. The results indicated that the hydrogel made of DNA, gelatin and kappa-carrageenan can efficiently maintain the functional materials. Furthermore, a complex gel was developed and optimized by applying an emulsion of lactic acid bacteria and cacao oil onto the already prepared hydrogel. The existence of the lactic acid bacteria in the oil emulsion particles was confirmed by scanning electron microscopy. The protection capabilities in the simulated gastrointestinal juice, which had a viability of 1.50 x 10(6) CFU/g gel after 2 h incubation in the simulated gastric juice and 2.53 x 10(7) CFU/g gel after 6 h continued incubation in the simulated intestinal juice, were measured, in contrast to 2.58 x 10(7) CPU/g in the original gel before treatment.
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Affiliation(s)
- Benjamas Jonganurakkun
- Division of Bioscience, Graduate School of Environmental Earth Science, Hokkaido University, Sapporo 060-08110, Japan
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69
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Yamada M, Kato K, Nomizu M, Haruki M, Ohkawa K, Yamamoto H, Nishi N. UV-Irradiated DNA Matrix Selectively Accumulates Heavy Metal Ions. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2002. [DOI: 10.1246/bcsj.75.1627] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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