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  • 1
    Digitale Medien
    Digitale Medien
    Production and identification of new neutron-rich fragments from 33 MeV/u86Kr beam in the 18≦Z≦27 region (1985)
    Springer
    The European physical journal 322 (1985), S. 415-418 
    Details
    ISSN: 1434-601X
    Schlagwort(e): 21.10.−k ; 07.75.+h
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract The new nuclei47Ar,57Ti,59,60V,61,62Cr,64,65Mn,66,67,68Fe,68,69,70Co haye been produced by fragmentation of a86Kr beam and identified through time of flight andΔE×E measurements. The tentative observation of56Ti,57,58V,60Cr and65Fe by other groups is confirmed.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01412075
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  • 2
    Digitale Medien
    Digitale Medien
    Total cross sections of reactions induced by neutron-rich light nuclei (1989)
    Springer
    The European physical journal 332 (1989), S. 457-465 
    Details
    ISSN: 1434-601X
    Schlagwort(e): 21.10.-k ; 07.75.+h ; 21.10.Gv ; 25.70.Np ; 27.20.+n
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract Total nuclear reaction cross-sections are determined by means of a 4π-γ method. The results cover a wide span of targets for various stable beams. The validity of the method is shown in a combined systematics including also the results of transmission-type experiments. The data are very well described by the formula developed by Kox et al. The same method is applied to secondary fragment beams produced from a 44 MeV/u22Ne beam on a 332mg/cm2 181Ta target. Using the LISE spectrometer the fragments4, 6He,6–9, 11Li,7, 9–12, 14Be,10–15, 17B11–19C,13–19N,15–21O,18– 21F and20,21 Ne are analyzed and transported to interact with a 199.4 mg/cm2 Cu target surrounded by a 4π-γ counter. The measured total reaction cross-sectionsσ R are discussed in terms of the reduced strong absorption radiusr 0 and compared with other experimental results.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01292431
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  • 3
    Digitale Medien
    Digitale Medien
    Direct stereochemical assignment of sugar subunits in naturally occurring glycosides by low energy collision induced dissociation. Application to papulacandin antibiotics (1988)
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 15 (1988), S. 441-446 
    Details
    ISSN: 0887-6134
    Schlagwort(e): Chemistry ; Analytical Chemistry and Spectroscopy
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Notizen: A tandem mass spectrometric method is described which allows the assignment of stereochemistry to fragment ions comprising intact sugar subunits of larger glycosides without chemical degradation and product isolation by chromatography. The approach relies on the mass selection of the ‘sugar ion’ of interest followed by analysis of stereoselective fragmentation induced by low-energy collisional activation. The daughter ion spectra provide configurational fingerprints of the selected sugar ions which can be matched for identity with reference spectra obtained from suitable precursors of known stereochemistry. Glucose, mannose and galactose furnished the required set of the most important reference ions. By using peracetyl (and perdeuterioacetyl) derivatives, galactose was readily identified as the glycosidic sugar constituent of the (known) antibiotic papulacandin B and a further (unknown) congener.
    Zusätzliches Material: 5 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/bms.1200150805
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  • 4
    Digitale Medien
    Digitale Medien
    High temperature (GC)2 and (GC)2/CI-MS of nucleosides: Analysis of purinyl nucleoside isomer composition (1980)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 3 (1980), S. 161-165 
    Details
    ISSN: 0935-6304
    Schlagwort(e): GC, GC/MS ; Capillary, HMDS-deactivated ; On-column injection ; Nucleoside linkage isomers ; Separation, structural assignment feasibilities ; Chemistry ; Analytical Chemistry and Spectroscopy
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Notizen: The analysis of low-volatile polar nucleosides by (GC)2/FID and (GC)2/CI-MS, employing HMDS-deactivated glass capillary columns and on-column injection, is described. The four linkage isomers of a specific nucleoside, formed in the synthetic procedure, are in each case sufficiently well separated in the chromatogram; GC/CI-MS allows for a differentiation of N-7 and N-9 linkage isomers.
    Zusätzliches Material: 4 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/jhrc.1240030402
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  • 5
    Digitale Medien
    Digitale Medien
    All-glass capillary T-joints and manifolds (1980)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 3 (1980), S. 411-412 
    Details
    ISSN: 0935-6304
    Schlagwort(e): Gas chromatography ; Capillary, glass ; All-glass T-joints and manifolds with small dead volume, production of ; Up to five-channel outlet splitter ; Chemistry ; Analytical Chemistry and Spectroscopy
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Zusätzliches Material: 2 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/jhrc.1240030806
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  • 6
    Digitale Medien
    Digitale Medien
    Zur Korrosion verzinkter Eisenwerkstoffe durch natürliche Brauchwässer (1973)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 24 (1973), S. 282-286 
    Details
    ISSN: 0947-5117
    Schlagwort(e): Chemistry ; Polymer and Materials Science
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Maschinenbau
    Beschreibung / Inhaltsverzeichnis: Corrosion of galvanized ferrous materials by natural watersLaboratory and field test with galvanized irons do not reveal clear interrelations between water quality and corrosion. Likewise it is not possible on the basis of potential measurements to make any statement with respect to the formation of protective layers. It is for this reason that some doubt may be expressed as to the applicability of the test method according to DIN 50 930, the more so as the formation of ZnCO3 could be shown to take place in some few cases only.
    Notizen: Laboratoriums- und Feldversuche mit verzinktem Eisen zeigen keine eindeutigen Zusammenhänge zwischen Wasserbeschaffenheit und Korrosion. Ebenso ist es nicht möglich, aufgrund von Potentialmessungen Aussagen über die Schutzschichtbildung zu machen. Aus diesem Grunde kann auch die Anwendbarkeit der Untersuchungsmethode nach DIN 50 930 in Zweifel gezogen werden, zumal nur in Einzelfällen die Bildung von ZrCO3 eindeutig nachgewiesen werden konnte.
    Zusätzliches Material: 1 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/maco.19730240405
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  • 7
    Digitale Medien
    Digitale Medien
    Tandem mass spectrometric analysis of fixed-charge derivatized oligosaccharidesPresented at the 12th IMSC, Amsterdam, August 1991. (1994)
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 29 (1994), S. 713-719 
    Details
    ISSN: 0030-493X
    Schlagwort(e): Chemistry ; Analytical Chemistry and Spectroscopy
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Notizen: Various derivatives of a set of three isomeric (linear and branched) pentasaccharides (LNF-1, LNF-2 and LNF-3) were prepared and investigated by high-performance tandem mass spectrometry in order to compare their collision-induced dissociation (CID) behaviour. The fast atom bombardment tandem mass spectra of [M + H]+ ions of peracetylated derivatives mainly display fragments containing the non-reducing terminus (B-type ions) and allow a straightforward assignment of sugar sequence and branching together with the identification of some interglycosidic linkages. Permethylated derivatives, which better accommodate the mass range of tandem mass spectrometers in the case of larger oligosaccharides, yield similar results, i.e. predominance of B ions, but the necessary information has to be retrieved from incomplete Bi and Yi ion series. By contrast, CID of permethyl or peracetyl derivatives carrying a preformed charge due to prior reductive amination of the oligosaccharides with trimethyl(p-aminophenyl)ammonium chloride yields exclusively fragment ions comprising the reducing end. In this case, the four distinct series of fragments observed involve charge-remote fragmentation processes. As a consequence, the spectral patterns are not significantly affected by the nature of the sugar O-substituents additionally introduced (i.e. methyl or acetyl).
    Zusätzliches Material: 4 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/oms.1210291204
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  • 8
    Digitale Medien
    Digitale Medien
    High performance tandem mass spectrometry for sequence, branching and interglycosidic linkage analysis of peracetylated oligosaccharides (1990)
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 19 (1990), S. 390-392 
    Details
    ISSN: 1052-9306
    Schlagwort(e): Chemistry ; Analytical Chemistry and Spectroscopy
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Zusätzliches Material: 2 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/bms.1200190611
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  • 9
    Digitale Medien
    Digitale Medien
    Characterization and direct glycoform profiling of a hybrid plasminogen activator by matrix-assisted laser desorption and electrospray mass spectrometry: Correlation with high-performance liquid chromatographic and nuclear magnetic resonance analyses of the released glycansPresented in part at the Kyoto '92 International Conference on Biological Mass Spectrometry, September 20-24, 1992 (see ref. 2). (1994)
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 23 (1994), S. 330-338 
    Details
    ISSN: 1052-9306
    Schlagwort(e): Chemistry ; Analytical Chemistry and Spectroscopy
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Notizen: Mass spectrometric analysis of the recombinant hybrid plasminogen activator K2tu-PA at the native glycoprotein and corresponding protein level (high mass) is described. For gross structural characterization of the major glycotypes present, a combination of enzymatic degradation and matrix-assisted laser desorption mass spectrometric analysis of the products proved convenient. In this way, mono- and di-N-glycosylated one- and two-chain molecules, unresolved in the spectra of native material, were identified, with the one-chain type monoglycosylated at Asn247 representing the major component. Actual detection of resolved original glycoforms, or unresolved groups thereof when composed of isobaric species, and their assignments regarding antennicity and degree of sialylation were possible by electrospray mass spectrometry for the major monoglycosylated one-chain species. Desialation also allowed detection of the diglycosylated one-chain species as a minor constituent. The electrospray mass spectrometric results were correlated with structural and quantitative data available from a parallel high-performance liquid chromatographic and 1H nuclear magnetic resonance study performed at the glycan (low mass) level on liberated individual carbohydrate components. The results of the two studies showed full consistency in all respects amenable to evaluation, i.e. excellent agreement for the assignments of antennicity and degree of sialylation of the major glycan components, and good agreement for the determination of proportions in which these were present in the major monoglycosylated glycoprotein. This provided a sound basis for direct glycoform profiling by electrospray mass spectrometry. Typical applications to batch quality control and to structural characterization of nonstandard material are shown.
    Zusätzliches Material: 6 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/bms.1200230606
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  • 10
    Digitale Medien
    Digitale Medien
    A conductometric detector for capillary separations (1996)
    Weinheim : Wiley-Blackwell
    Electroanalysis 8 (1996), S. 722-725 
    Details
    ISSN: 1040-0397
    Schlagwort(e): Conductometry ; Detection ; Capillary electrophoresis ; Capillary HPLC ; Chemistry ; Polymer and Materials Science
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Notizen: A simple electrochemical cell has been constructed for conductometric detection in capillary electrophoresis or HPLC. A platinum ring electrode is chemically deposited at the capillary end and the other electrode, a platinum wire, is immersed, together with the capillary, in a vessel containing the running buffer or the mobile phase used. The cell has been tested on a model system and its operational parameters have been discussed. The measurement is very sensitive (a limit of determination of ca. 3 × 10-9 M for potassium ions) and the detector response is rapid, comparable with that of the UV photometric detector. The dynamic range is wide (at least five concentration decades) but is nonlinear at high concentrations.
    Zusätzliches Material: 3 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/elan.1140080804
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