ZfN: Search Results

1	Author	S. Scheller, M. Czauderna, W. Krol, J Z Konecki+, Czuba, J. Gabrys+, M. Glowacka+, J. Shani+	Requires cookie*
	Title	Trace Elements in Propolis and in its Ethanolic Extract (E E P ) as Determined by Neutron Activation Analysis
	Abstract	Propolis is a natural composite balsam, manufactured by honey bees, and active biochemically. Some of its biologi cal effects are attributed to its ability to stimulate enzymatic systems, which in many instances involve trace elements. In the present study we assayed propolis and its ethanolic ex tract (EEP) for trace elements, and quantified them with the aid of neutron activation analysis. Four elements that have been detected in propolis and EEP for the first time are Na. Cr, Co (ppm) and Ag (ppb). The wide concentra tion range of the inorganic components in various batches of propolis and EEP is due to the difference in their extrac tion capacities, and to the variability in the environmental pollutants and the flora at the beehive sites.
	Reference	Z. Naturforsch. 44c, 170—172 (1989); received September 28 1988
	Published	1989
	Keywords	Propolis, Trace Elements, Neutron Activation Honey Bee
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	TEI-XML for	default:Reihe_C/44/ZNC-1989-44c-0170_n.pdf
	Identifier	ZNC-1989-44c-0170_n
	Volume	44

2	Author	H. Feuerstein, J. Oschinski	Requires cookie*
	Title	Bestimmung von Spurenelementen in menschlicher Haut Determination of Trace Elements in Human Skin
	Abstract	The elements Cu, Ag, Au, Cr, Fe, Zn, As, Mo and W have been determined in human skin using the neutron activation technique. The values are compared to values published in the litera ture. The values are scattering over a wide range, leading to the assumption of an uneven distribu tion of the trace elements in human skin. From the results of a special sample it is concluded that carrying a golden ring over a longer period of time will not contaminate the skin by gold or copper. The investigation of a skin sample where gold has been plated out showed a maximum of the gold concentration beneath the skin surface.
	Reference	(Z. Naturforsch. 29c, 414—416 [1974]; eingegangen am 25. April 1974)
	Published	1974
	Keywords	Neutron Activation Analysis, Trace Elements, Human Skin, Gold Distribution
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	TEI-XML for	default:Reihe_C/29/ZNC-1974-29c-0414.pdf
	Identifier	ZNC-1974-29c-0414
	Volume	29

3	Author	H. Wesch, R. Jonak, H. Nemetschek-Gansler, H. Riedl, Th Nemetschek	Requires cookie*
	Title	Der Einfluß von D-Penicillamin auf den Gehalt einiger Organe an Spurenelementen sowie auf die mechanischen Eigenschaften von Kollagen Trace Elements in Several Organs and Mechanical Properties of Collagen under the Influence of D-Penicillamin
	Abstract	The content of trace elements in several organs of rats under the influence of D-penicillamine (D-PA) was investigated by the neutronactivation-analysis. It could be shown an diminution of Cu, and Co under D-PA-treatment, the content of Fe, Mn, Rb and Zn was not influenced. The investigat ed organs didn't show any submicroscopic alterations under D-PA. On isolated collagen fibrils of tail tendon was seen a significantly diminuition of E-moduls. In accordance with Siegel the principal effect of D-PA is thought to block the synthesis of functional groups from Schiff-base crosslink precursors but not to inhibit lysyloxidase by loss of Cu-ions of connective tissue. The thermostability of D-PA influenced fibrils is changed in stretched state only and will be due to the lack of crosslink Schiff-bases; where as the shrinking point of not stretched fibrils shows only aging dependent changes.
	Reference	Z. Naturforsch. 33c, 346 (1978); eingegangen am 17. März 1978
	Published	1978
	Keywords	D-Penicillamin, Trace Elements, Electron Microscopy, Biosynthesis, Cross-Links, Mechanical Properties of Collagen
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	TEI-XML for	default:Reihe_C/33/ZNC-1978-33c-0346.pdf
	Identifier	ZNC-1978-33c-0346
	Volume	33