SVIBOR - Papers quoted in CC - project code: 1-03-018
MINISTRY OF SCIENCE AND TECHNOLOGY
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SVIBOR - Collecting Data on Projects in Croatia
Papers quoted in Current Contents on project 1-03-018
Quoted papers: 12
Other papers: 6
Total: 18
Title: Thiocysine as a radiation energy trap in a single
crystalof cytosine hydrochloride
- Authors:
- Herak, Janko N. (15541)
- Sanković, Krešimir (28635)
- Huttermann, Jurgen
Journal: Int. J. Radiat. Biol.
Number: 1
Volume: 66
Year: 1994
Pages: from 3 to 9
Number of references: 17
Language: engleski
Summary: Single crystals of cytosine hydrochloride with thiocytosine
as an impurity were found suitable for the study of a possible new
mechanism of long-range migration of energy deposited by ionizing
radiation. In a crystal containing thiocytosine, two kinds of
chlorine-containing paramagnetic centers are present that are completely
absent in the pure cytosine.HCl crystals irradiated under the same
condition. The thiocytosine molecules in conjunction with Cl(-) ions behave
as hole traps. The centers have been characterized by EPR spectroscopy. One
of the centers is derived from the cationic thiocytosine radical by
interaction of a Cl(-) ion, and the other center is formed by interaction
of a Cl atom with a thiocytosine molecule. It is suggested that the
transfer of an electron-loss site (a hole) in the Cl(-) network is the
actual mechanism of the long-range energy transfer.
Keywords: cytosine, EPR, free radicals, radiation energy transfer, radiation energy trapping
Title: Formation of free radicals in oxidation of human
low-density lipoprotein. An EPR spin trapping study
- Authors:
- Herak-Kramberger, Carol Mirna (149081)
- Ukrainczyk, Tatjana
- Herak, Janko N. (15541)
- Krilov, Dubravka (23525)
Journal: Croat. Chem. Acta
Number: 2
ISSN: 0011-1643
Volume: 68
Year: 1995
Pages: from 409 to 415
Number of references: 21
Language: engleski
Summary: The EPR spin trapping method with PBN as a spin trap was
used to study the formation of free radicals in human low-density
lipoprotein (LDL) upon aging at 37 C. The PBN associated radicals could be
observed after 10-20 hours of incubation , depending on the pretreatment of
LDL and the individual donor. The radicals observed in the first period of
time (until about 20-25 hours of incubation) are related to the degradation
products of PBN. After that, additional radicals associated with lipids are
observed. The presence of EDTA does not prevent the process. The present
experiments prove that some. relatively fast oxidation process takes place
in LDL incubated at physiological temperature. The process is mild, as
judged from the essentially unchanged concentration of thiobarbituric
acid-reactive substances (TBARS). An active role of the spin trap is not
excluded.
Keywords: EPR, free radicals, lipoprotein oxidation, low-density lipoprotein
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