PMID- 12872934
OWN - NLM
STAT- MEDLINE
DCOM- 20031021
LR  - 20231213
IS  - 0939-5075 (Print)
IS  - 0341-0382 (Linking)
VI  - 58
IP  - 5-6
DP  - 2003 May-Jun
TI  - Effects of a switched weak magnetic field on lecithin liposomes, investigated by 
      nonlinear dielectric spectroscopy.
PG  - 386-94
AB  - Three types of liposomes in aqueous solution were subjected to a low frequency 
      switched weak magnetic field. A differential non-linear dielectric spectroscopy 
      (DNLDS) was performed at 40 degrees C with two planar orthogonal electrodes, 
      positioned parallel and vertical to the earth surface. The difference of the free 
      voltage release (FVR) signals for the two orthogonal directions following 
      electric pulses with an amplitude of 1.0 V and a duration of 25 ms, were 
      Fourier-transformed. An additional magnetic field was switched with a period of 
      400 ms and a variable amplitude from 0 to 100 G, whose direction was parallel to 
      the vertical electrode plane. With two of the liposomes (egg yolk lecithin (EY), 
      asolectin doped with cholesterol (ASCO)) a decrease of the signal amplitude with 
      increasing magnetic fields could be seen in most of the 25 observed harmonic 
      frequencies (relative to the electric pulse frequency f(0) = 40 Hz). For EY 
      liposomes this decrease was highly significant and not linear for the 1.-5., and 
      above the 20. harmonic frequency, ASCO liposomes showed a similar effect. 
      Asolectin liposomes showed the reverse response. Quantum mechanical conditions of 
      charges on the liposome surface are discussed as a possible origin of these 
      effects
FAU - Pazur, Alexander
AU  - Pazur A
AD  - Department Biologie 1 Universitat Munchen-Bereich Botanik, Menzingerstr. 67, 
      D-80638 Munchen. pazur@botanik.biologie.uni-muenchen.de
LA  - eng
PT  - Comparative Study
PT  - Journal Article
PL  - Germany
TA  - Z Naturforsch C J Biosci
JT  - Zeitschrift fur Naturforschung. C, Journal of biosciences
JID - 8912155
RN  - 0 (Liposomes)
RN  - 0 (Phosphatidylcholines)
RN  - 0 (Phospholipids)
RN  - 69279-91-0 (asolectin)
SB  - IM
MH  - Animals
MH  - Egg Yolk/chemistry
MH  - Electrochemistry/methods
MH  - Kinetics
MH  - Liposomes/chemistry/*radiation effects
MH  - *Magnetics
MH  - Phosphatidylcholines/chemistry/*radiation effects
MH  - Phospholipids/chemistry
MH  - Glycine max/chemistry
MH  - Spectrum Analysis/methods
EDAT- 2003/07/23 05:00
MHDA- 2003/10/22 05:00
CRDT- 2003/07/23 05:00
PHST- 2003/07/23 05:00 [pubmed]
PHST- 2003/10/22 05:00 [medline]
PHST- 2003/07/23 05:00 [entrez]
AID - 10.1515/znc-2003-5-617 [doi]
PST - ppublish
SO  - Z Naturforsch C J Biosci. 2003 May-Jun;58(5-6):386-94. doi: 
      10.1515/znc-2003-5-617.