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  • Polymer and Materials Science  (8)
  • Column liquid chromatography  (5)
  • (Human)  (3)
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  • 1
    Digitale Medien
    Digitale Medien
    Human α-galactosidase gene expression: significance of two peptide regions encoded by exons 1-2 and 6
    Amsterdam : Elsevier
    Biochimica et Biophysica Acta (BBA)/Protein Structure and Molecular 1204 (1994), S. 265-270 
    Details
    ISSN: 0167-4838
    Schlagwort(e): (Human) ; Galactosidase ; Gene expression ; α-Galactosidase
    Quelle: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Thema: Biologie , Chemie und Pharmazie , Medizin
    Materialart: Digitale Medien
    URL: http://linkinghub.elsevier.com/retrieve/pii/0167-4838(94)90017-5
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  • 2
    Digitale Medien
    Digitale Medien
    Isolation, structural determination and expression of a novel reg gene, human reg Iβ
    Amsterdam : Elsevier
    Biochimica et Biophysica Acta (BBA)/Gene Structure and Expression 1217 (1994), S. 199-202 
    Details
    ISSN: 0167-4781
    Schlagwort(e): (Human) ; Expression ; Gene structure ; Regenerating gene ; cDNA ; reg ; reg/PSP gene family
    Quelle: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Thema: Biologie , Chemie und Pharmazie , Medizin , Physik
    Materialart: Digitale Medien
    URL: http://linkinghub.elsevier.com/retrieve/pii/0167-4781(94)90035-3
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  • 3
    Digitale Medien
    Digitale Medien
    Cloning and sequence analysis of a full length cDNA encoding human mitochodrial 3-oxoacyl-CoA thiolase
    Amsterdam : Elsevier
    Biochimica et Biophysica Acta (BBA)/Gene Structure and Expression 1216 (1993), S. 304-306 
    Details
    ISSN: 0167-4781
    Schlagwort(e): (Human) ; Fatty acid oxidation ; Mitochondrial enzyme ; Non-cleavable signal ; Reye syndrome ; Sequence homology ; Sudden infant death
    Quelle: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Thema: Biologie , Chemie und Pharmazie , Medizin , Physik
    Materialart: Digitale Medien
    URL: http://linkinghub.elsevier.com/retrieve/pii/0167-4781(93)90160-F
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  • 4
    Digitale Medien
    Digitale Medien
    Evaluation of the influence of the base material loaded with hydrous zirconium oxide gel on the retention behavior of disubstituted benzoic acids (1996)
    Springer
    Chromatographia 43 (1996), S. 79-81 
    Details
    ISSN: 1612-1112
    Schlagwort(e): Column liquid chromatography ; Hydrous zirconium oxide ; Porous polymer resin ; Silica gel ; ortho-Benzoic acid derivatives
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie
    Notizen: Summary Silica gel loaded with hydrous zirconium oxide (Zr-gel-S) has been prepared and the influence of the base material on the retention behavior ofo-phthalic acid on the hydrous zirconium oxide was evaluated. The retention behavior of the acid on the Zr-gel-S was compared with that on Zr-gel-5, the polymer-based Zr-gel. Comparable retention behavior,i.e. maximum retention in the vicinity of pH 6, which has been regarded as the equal adsorbic point, was observed for both types of Zr-gel, although there was a large difference in the retention times. The difference in retention on the two types of Zr-gel could be ascribed to nature of the base material. The results in this experiments showed, however, that the specific behavior at pH 6 was an essential characteristic of hydrous zirconium oxide and was not related to the influence of the base materials.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02272826
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  • 5
    Digitale Medien
    Digitale Medien
    Comparison of surface states of chemically modified silicas in aqueous acetonitrile and methanol (1991)
    Springer
    Chromatographia 31 (1991), S. 347-350 
    Details
    ISSN: 1612-1112
    Schlagwort(e): Column liquid chromatography ; Chemically modified silicas ; Surface states ; n-alkylbenzenes
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie
    Notizen: Summary The thermodynamic behaviour of n-alkylbenzenes on chemically modified silicas in reversed-phase liquid chromatography has been examined in acetonitrile-water and methanol-water systems. Plots of the thermodynamic parameters obtained against the organic solvent compositions indicate an interesting trend which implies that the surface states of the chemically modified silicas under the two eluent systems are different.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02262190
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  • 6
    Digitale Medien
    Digitale Medien
    Syntheses of spherical silica and titania from alkoxides on a laboratory scale (1994)
    Springer
    Chromatographia 38 (1994), S. 291-294 
    Details
    ISSN: 1612-1112
    Schlagwort(e): Column liquid chromatography ; Column packings ; Silica and titania ; Sol-gel method
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie
    Notizen: Summary A process to synthesize silica and titania as spherical packing materials has been investigated on the laboratory scale by the sol-gel method. The silica and titania obtained were tested under normal-phase separation conditions for comparison of their retention characteristics silica witha a commercial. The silica was found to be similar in its retention behaviour to the commercial silica. The titania showed basic properties and strongly retained acidic compounds.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02269770
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  • 7
    Digitale Medien
    Digitale Medien
    Surface chlorination of polypropylene film by CHCI3 plasma (1994)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 51 (1994), S. 2131-2137 
    Details
    ISSN: 0021-8995
    Schlagwort(e): Chemistry ; Polymer and Materials Science
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie , Maschinenbau , Physik
    Notizen: Polypropylene films were treated with the CHCI3 plasma, and their chemical composition was analyzed with XPS and ART IR spectroscopy. The CHCI3 plasma irradiation made polypropylene films hydrophilic. The advancing contact angle decreases from 95° for the untreated to about 73° for the CHCI3 plasma-treated films. In the CHCI3 plasma irradiation, the chlorination occurs, and C—Cl, C—Cl2, and C—Cl3 units are formed in the polypropylene films. Simultaneously with the chlorination, unsaturated units (C=C and conjugated C=C units) are formed from dehydrogen chlorination of the chlorinated products, but the oxygen incorporation into the films is low. The CHCI3 plasma is preferred in chlorination of polypropylene films to the CCl4 plasma. © 1994 John Wiley & Sons, Inc.
    Zusätzliches Material: 4 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/app.1994.070511304
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  • 8
    Digitale Medien
    Digitale Medien
    Elution behaviour of anions and cations on a mixed-bed stationary phase of anion and cation exchange resins (1995)
    Springer
    Chromatographia 40 (1995), S. 539-544 
    Details
    ISSN: 1612-1112
    Schlagwort(e): Column liquid chromatography ; Mixed-bed stationary phase ; Anion and cation exchange resins ; Retention mechanism of anions and cations
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie
    Notizen: Summary The retention mechanism of anions and cations on a mixed-bed column packed with a mixture of strong anion and cation exchange resins has been studied. Organic acids and inorganic anions have showed the same elution behaviour on the mixed-bed column as on a single anion exchange column. In contrast, different elution behaviours for cations have been observed between the mixed-bed column and a single cation exchange column. On the mixed-bed column, cations would be eluted by a mixed retention mechanism. The primary retention mechanism is ion exchange with eluent cation (H+) for all cations. The ion exchange mechanism on the sites occupied by anion exchange groups makes a greater contribution for monovalent cations. A partition mechanism between the stationary phase and mobile phase contributes to the separation of Mg2+ and Ca2+ by forming neutral compounds.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02290265
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  • 9
    Digitale Medien
    Digitale Medien
    Determination of the specific interaction of disubstituted aromatic compounds on hydrous zirconium oxide-loaded porous polymer resin (1996)
    Springer
    Chromatographia 42 (1996), S. 396-400 
    Details
    ISSN: 1612-1112
    Schlagwort(e): Column liquid chromatography ; Hydrous zirconium oxide ; Porous polymer resin ; Disubstituted phenols ; ortho-Benzoic acid derivatives
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie
    Notizen: Summary A porous polymer resin loaded with hydrous zirconium oxide (Zr-gel) was evaluated as a stationary phase for the liquid chromatographic separation of disubstituted aromatic compounds. The prepared Zr-gel was used to separate disubstituted phenols andortho-substituted benzoic acid derivatives in reversed-phase mode. The retention time of catechol was greater than those of other disubstituted phenols; this implies that the Zr-gel has specificity for the phenolic hydroxyl group. The retention behavior ofortho-substituted benzoic acid derivatives on the Zr-gel was also evaluated in reversedphase mode using buffer. Phthalic acid was specifically retained in the vicinity of pH 6.0, which has been regarded as the equal adsorbic point. Similar behavior was also observed for salicylic acid, although the retention time of salicylic acid was less than that of phthalic acid. It seems that the specific retention behavior of hydrous zirconium oxide is a result of complexation with ligands such as hydroxyl and carboxyl groups. The results of this study have revealed that the retention mechanism of hydrous zirconium oxide is a combination of ion exchange and interaction based on complexation with ligands.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02272129
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  • 10
    Digitale Medien
    Digitale Medien
    XPS and SERS Studies of Cell Adhesion-controlled Polymer Modified by Ion Implantation (1996)
    Chichester [u.a.] : Wiley-Blackwell
    Surface and Interface Analysis 24 (1996), S. 252-256 
    Details
    ISSN: 0142-2421
    Schlagwort(e): Chemistry ; Polymer and Materials Science
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Physik
    Notizen: X-ray photoelectron spectroscopy (XPS) of Ne ion-bombarded polymer has been carried out in order to examine the cause of HeLa cell adhesion control on polymers. Substrates used were polystyrene (PS) and oxygen plasma-treated polystyrene (PS-O). Neon bombardments into the patterned region of PS and PS-O were performed at an energy of 150 keV with fluences of 1×1014 and 1×1015 ions cm-2. The surface chemical bonding states were investigated by XPS. In HeLa cell adhesion measurements, the Ne-bombarded region of PS with a fluence of 1×1015 ions cm-2 exhibits higher adhesion and spreading of HeLa cells than the unbombarded region. On the contrary, it is found that the Ne-bombarded region of PS-O inhibits HeLa cell adhesion. The XPS results show that Ne bombardment to PS or PS-O destroys the original chemical bonds and consequently produces new functional groups. It is considered that the drastic change of surface chemical bonding states from the pristine states induced by Ne bombardment leads to a clear distinction between increasing and inhibiting HeLa cell adhesion.
    Zusätzliches Material: 7 Ill.
    Materialart: Digitale Medien
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