ZfN: Search Results

1	Author	Wolfgang Lohmann, Max Hillerbrand, Max Klenert	Requires cookie*
	Title	Charge-Transfer Interactions between Nucleobases and Metal Ions: ESR and Optical Absorption Studies
	Abstract	The charge-transfer interaction of different nucleobases with Cu2+ has been investigated by means of ESR and optical absorption studies. It could be shown that cytosine forms the strongest complex. The greatest reduction of Cu2+ (that is, spin concentration) was obtained, however, with adenine. Based on these results the following order for the electron donor strength of the nucleo bases has been obtained: Ade>Cyt!>Thy>Ura. In troduction
	Reference	(Z. Naturforsch. 29c, 667 [1974]; received March 18/June 15 1974)
	Published	1974
	Keywords	CT-Interactions, Electron Donor, Nucleobases, ESR, Metal Ions
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	TEI-XML for	default:Reihe_C/29/ZNC-1974-29c-0667.pdf
	Identifier	ZNC-1974-29c-0667
	Volume	29

2	Author	Manfred Schnarr, MichaelM. Atthies, Wolfgang Lohmann	Requires cookie*
	Title	The Influence of Different Solvents on the Interaction between Metal Ions and Tetracycline
	Abstract	The interaction o f the antibiotic tetracycline with a few metal ions, esp. Cu(II), in different so l vents has been investigated by means o f IR, ESR, and U V /V IS spectroscopy. It could be shown that the site o f com plexation depends on the solvent used. In DM SO the interaction occurs mainly via the A ring. In water (pH = 5.7) and octanol, the A chrom ophore as well as the BCD entity o f the m olecule are involved in com plexation. If the tetracycline concentration exceeds the Cu(II) concentration, a 2 : 1 (antibiotic : Cu(II)) com plex seems to be formed, at least in DM SO.
	Reference	Z. Naturforsch. 34c, 1156 (1979); received June 25 1979
	Published	1979
	Keywords	Tetracycline, Antibiotics, Metal Ions, Com plexation, O ptical Absorption
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	TEI-XML for	default:Reihe_C/34/ZNC-1979-34c-1156.pdf
	Identifier	ZNC-1979-34c-1156
	Volume	34