effect Electron donor Effect of water cluster state influenced by the polarized properties on dielectric constant and loss. hydrogenbonding energy meV meV -CH3 toluene 9.04 7.82 -0CH3 anisole 11.42 13.13 * v 3 * V I function compound T. Iwasawa, K. Ohota, M. Sone Musashi Institute of Technology 1-28-1 Tamazutsumi Setagayaku Tokyo 158 JAPAN benzene AbstractIn order to describe the mechanisms of the effect of water on electrical properties, we scope the state of the dissolved water which can be analyzed by IR spectrum. In our studies, it has been investigated that the conduction current in a dielectric liquid relates with the structure of water clusters which are formed by hydrogen bonding. Confirming the formation of water cluster, the dielectric constant and loss of several kinds of aromatic hydrocarbons are measured in this report. The samples used can be classified to the two groups. One is the sample which has a electron donor functional group, and another is a electron donor functional group. As the results, the effect of water on the dielectric constant and loss in the electron donor functional group is not sensitive rather than that on the electron acceptor functional group. Because of the hydrogen bonding energy calculated from IR spectrum is not quite different in the donor group and acceptor group, the sensitivity of the effect of water on dielectric constant and loss would be caused by the polarization characteristics of benzene ring. 9.04 7.67
It has been understood that the deterioration of electrical properties was caused by the amount of dissolved water in liquid dielectrics. Moreover, it is believed that such dissolved water molecules diffuse into free space in liquid dielectrics uniformly, because the behavior of water molecule can not be observed by Karlfisher's method, though only the amount of water has been observed. But recently, by using FT-IR method, it is published that the almost dissolved water molecules behave as binding water bound by the polar bases of dielectrics. The binding force was caused by hydrogen bonds between
In the present study, we performed an experiment to clarify the possible effects of magnetic fields of up to 8 T on cell membrane fluidity by using red blood cell ghosts and a fluorescence dye, 1-aminonaphthalene-8-sulfonic acid (ANS). The time course of ANS emission at 480 nm under the influence of a magnetic field at 5 T was observed. The effects of multiple rapid temperature changes and magnetic fields were investigated. The emission intensity at 480 nm increased when the temperature of the cell holder was increased from 20 to 38–46 °C for 15 min. A change in temperature exhibited an increase in the fluidity of the lipid molecules in the cell membrane and increased the population of ANS molecules emitting light at 480 nm in the cell membrane, which is hydrophobic. A discontinuous change in fluorescence at 38–40 °C was exhibited under exposure to a magnetic field at 5 T, while the temperature dependency was continuous without exposure to the magnetic field. In addition, under exposure to the magnetic field, the fluorescence during a decrease in temperature from 38 to 20 °C remained at a level close to the fluorescence during an increase in temperature. The results indicated that the fluidity of the molecules in the cell membrane was decelerated by exposure to magnetic fields at 5 T. We speculated that the magnetic orientation in a part of the lipid membrane disturbed the release of ANS molecules from a hydrophobic region of the membrane.
Thermal dependence of Dielectric property and conductivity of dielectric liquid tlissolving bound waler were measured and the effect of hyclrogen bonded molecular orientation structure on contluctim mechanism was cliscusscd. In the free volume. water bincling wit,h clielect~ric does not changc its orientation structure so that dielectric consliint( E s) increase. Bound water were suggested to disperse homogeneously in the liquid mncroscopically. And It was appeared that tfhe more poliirizcrl liquid waler dissolve in, the more effective bound water i i d temperature increase conductivit.y.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.