Mechanical and dielectric properties of bulky side chain poly(methacrylates). Analysis of the low frequency phenomena. 1: Poly(5-indanyl methacrylate)

1997 ◽  
Vol 37 (5) ◽  
pp. 882-887 ◽  
Author(s):  
Ricardo Diaz Calleja ◽  
Catherine Jaime's ◽  
M. J. Sanchis-Sanchez ◽  
Francisco Martinez-Piña ◽  
Ligia Gargallo ◽  
...  
Keyword(s):  
Dielectric Properties ◽  
Low Frequency ◽  
Side Chain ◽  
Bulky Side Chain

Low frequency dielectric properties in a ferromagnetic semiconductor (ED-TTFVO)2FeBr4with permanent electric dipoles

2004 ◽  
Vol 114 ◽  
pp. 125-126 ◽  
Author(s):  
E. Negishi ◽  
S. Yabuta ◽  
T. Matsumoto ◽  
T. Sugimoto ◽  
N. Toyota
Keyword(s):  
Dielectric Properties ◽  
Low Frequency ◽  
Ferromagnetic Semiconductor ◽  
Electric Dipoles

LOW-FREQUENCY DIELECTRIC PROPERTIES OF BIOLOGICAL TISSUES: A REVIEWWITH SOME NEW INSIGHTS

1998 ◽  
Vol 41 (1) ◽  
pp. 173-184 ◽  
Author(s):  
W. Kuang ◽  
S. O. Nelson
Keyword(s):  
Dielectric Properties ◽  
Low Frequency ◽  
Biological Tissues

Redesign of (R)-Omega-Transaminase and Its Application for Synthesizing Amino Acids with Bulky Side Chain

2021 ◽  
Author(s):  
Dong-Xu Jia ◽  
Chen Peng ◽  
Jun-Liang Li ◽  
Fan Wang ◽  
Zhi-Qiang Liu ◽  
...  
Keyword(s):  
Amino Acids ◽  
Side Chain ◽  
Bulky Side Chain

Low-Frequency Dielectric Properties of Acenaphtene

1993 ◽  
Vol 229 (1) ◽  
pp. 221-223
Author(s):  
B. Kucharska ◽  
J. Michalski ◽  
A. Szymaǹski ◽  
J. [sgrave]viatek
Keyword(s):  
Dielectric Properties ◽  
Low Frequency

scholarly journals Polytetrafluoroethylene Films in Rigid Polyurethane Foams’ Dielectric Permittivity Measurements with a One-Side Access Capacitive Sensor

Polymers ◽  
2021 ◽  
Vol 13 (7) ◽  
pp. 1173
Author(s):  
Ilze Beverte ◽  
Ugis Cabulis ◽  
Sergejs Gaidukovs
Keyword(s):  
Dielectric Properties ◽  
Dielectric Permittivity ◽  
Low Frequency ◽  
Capacitive Sensor ◽  
Polyurethane Foams ◽  
Active Area ◽  
Ptfe Film ◽  
Practical Applications ◽  
Permittivity Measurements ◽  
The Impact

As a non-metallic composite material, widely applied in industry, rigid polyurethane (PUR) foams require knowledge of their dielectric properties. In experimental determination of PUR foams’ dielectric properties protection of one-side capacitive sensor’s active area from adverse effects caused by the PUR foams’ test objects has to be ensured. In the given study, the impact of polytetrafluoroethylene (PTFE) films, thickness 0.20 mm and 0.04 mm, in covering or simulated coating the active area of one-side access capacitive sensor’ electrodes on the experimentally determined true dielectric permittivity spectra of rigid PUR foams is estimated. Penetration depth of the low frequency excitation field into PTFE and PUR foams is determined experimentally. Experiments are made in order to evaluate the difference between measurements on single PUR foams’ samples and on complex samples “PUR foams + PTFE film” with two calibration modes. A modification factor and a small modification criterion are defined and values of modifications are estimated in numerical calculations. Conclusions about possible practical applications of PTFE films in dielectric permittivity measurements of rigid PUR foams with one-side access capacitive sensor are made.

Interaction of Point Defects in Ice

1978 ◽  
Vol 21 (85) ◽  
pp. 115-122
Author(s):  
J. H. Bilgram ◽  
H. Gränicher
Keyword(s):  
Experimental Data ◽  
Dielectric Properties ◽  
Temperature Dependence ◽  
Point Defects ◽  
Low Frequency ◽  
Defect Concentration ◽  
Dielectric Measurements ◽  
Long Time ◽  
Nmr Techniques ◽  
Bjerrum Defect

AbstractThe interaction of point detects in ice has been neglected for a long time. Experimental data obtained from dielectric measurements on HF-doped crystals stimulated a new evaluation of the possibility of an interaction between Bjerrum defects and ions. In a previous paper it has been shown that this leads us to assume the existence of aggregates of Bjerrum defects and ions. In this paper these aggregates and Bjerrum defects are used to explain the dielectric properties of ice, especially the temperature dependence of the product of the high and low frequency conductivity σ0σ∞.The interaction of Bjerrum defects and impurity molecules leads to a dependence of the concentration of frenkel pairs on Bjerrum-defect concentration. At HF concentrations above the native Bjerrum-defect concentration the formation of a Frenkel pair is enhanced. This leads to the fast out-diffusion which has been studied in highly doped crystals by means of NMR techniques.

Dielectric properties of a hydrogen-bonded liquid-crystalline side-chain polymer

1995 ◽  
Vol 16 (10) ◽  
pp. 733-739 ◽  
Author(s):  
Kazuo Araki ◽  
Takashi Kato ◽  
Uday Kumar ◽  
Jean M. J. Fréchet
Keyword(s):  
Dielectric Properties ◽  
Liquid Crystalline ◽  
Side Chain ◽  
Chain Polymer ◽  
Hydrogen Bonded

scholarly journals Computation of currents induced by ELF electric fields in anisotropic human tissues using the Finite Integration Technique (FIT)

2005 ◽  
Vol 3 ◽  
pp. 227-231 ◽  
Author(s):  
V. C. Motrescu ◽  
U. van Rienen
Keyword(s):  
Dielectric Properties ◽  
Electromagnetic Fields ◽  
Electric Fields ◽  
Human Body ◽  
Low Frequency ◽  
Integration Technique ◽  
Human Body Model ◽  
Body Model ◽  
Finite Integration Technique ◽  
Muscle Tissues

Abstract. In the recent years, the task of estimating the currents induced within the human body by environmental electromagnetic fields has received increased attention from scientists around the world. While important progress was made in this direction, the unpredictable behaviour of living biological tissue made it difficult to quantify its reaction to electromagnetic fields and has kept the problem open. A successful alternative to the very difficult one of performing measurements is that of computing the fields within a human body model using numerical methods implemented in a software code. One of the difficulties is represented by the fact that some tissue types exhibit an anisotropic character with respect to their dielectric properties. Our work consists of computing currents induced by extremely low frequency (ELF) electric fields in anisotropic muscle tissues using in this respect, a human body model extended with muscle fibre orientations as well as an extended version of the Finite Integration Technique (FIT) able to compute fully anisotropic dielectric properties.

Low‐frequency dielectric properties of Co‐Al2O3composite films

1987 ◽  
Vol 50 (14) ◽  
pp. 937-939 ◽  
Author(s):  
G. A. Niklasson ◽  
K. Brantervik
Keyword(s):  
Dielectric Properties ◽  
Low Frequency

Pyroelectric and dielectric properties of side-chain liquid crystal polymers

1996 ◽  
Vol 36 (8) ◽  
pp. 1032-1037 ◽  
Author(s):  
Georg H. Mehl ◽  
Ina Nordmann ◽  
David Lacey ◽  
John W. Goodby ◽  
J. H. Christopher Hogg ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Dielectric Properties ◽  
Side Chain ◽  
Liquid Crystal Polymers
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