Frequency Dependence of Initial Heat Generation in Granular Magnetite Nanoparticles

2020 ◽  
Vol 77 (4) ◽  
pp. 293-297
Author(s):  
Hyung Joon Kim ◽  
Sunghyun Yoon
Keyword(s):  
Frequency Dependence ◽  
Heat Generation ◽  
Magnetite Nanoparticles ◽  
Initial Heat

Metal-film thermopiles for use with rabbit right ventricular papillary muscles

1977 ◽  
Vol 233 (5) ◽  
pp. C146-C156 ◽  
Author(s):  
L. A. Mulieri ◽  
G. Luhr ◽  
J. Trefry ◽  
N. R. Alpert
Keyword(s):  
Right Ventricular ◽  
Heat Generation ◽  
Muscle Fibers ◽  
Conduction Delay ◽  
Papillary Muscles ◽  
Semitendinosus Muscle ◽  
Active Length ◽  
Deposition Techniques ◽  
Activation Heat ◽  
Initial Heat

A method of fabricating Hill-Downing type, planar thermopiles by vacuum-deposition techniques is described in detail. The present model was designed for initial heat measurements on rabbit papillary muscles as small as 1 mg blotted wt, but it is also suitable for small bundles of frog muscle fibers (30–75). The thermopile has 20 or 14 junctions, an active length of 5 or 3.5 mm, and an actual thickness of 20 micrometer. It has an effective heat capacity of about 0.3 mcal/degrees C, a heat loss coefficient of about 0.3 mcal/degrees C - s, a temperature sensitivity of 1.4 mV/degrees C (20 junctions), and an electrical resistance of 180–200 omega. Infrared-emitting diodes are used to heat the thermopile and muscle artificially for thermal time constant and conduction-delay measurements. Performance of the thermopiles is demonstrated with initial heat records from rabbit right ventricular papillary muscles and a bundle of frog semitendinosus muscle fibers. Results of preliminary experiments concerning latency for heat generation, initial rate of heat generation, and activation heat in both types of muscles are presented.

scholarly journals Frequency dependence of magnetothermal properties for magnetic fluid and magnetically functionalized implants

2018 ◽  
Vol 185 ◽  
pp. 09003
Author(s):  
R.T. Salakhova ◽  
A. G. Vylegzhanin ◽  
E.A. Kashtanov ◽  
V.I. Zverev ◽  
R. Müller ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Magnetic Nanoparticles ◽  
Frequency Dependence ◽  
Magnetic Fluid ◽  
Magnetite Nanoparticles ◽  
Polymer Coating ◽  
Experimental Setup ◽  
Ac Magnetic Field ◽  
Magnetic Heating ◽  
Magnetite Particles

Heating of the magnetic nanoparticles in AC magnetic field is the effect promising for application in medicine. The mechanisms of heating in AC-magnetic field implies nontrivial dependence of the power dissipated by magnetic nanoparticles on frequency. With the use of a reconfigurable experimental setup, this frequency-dependent magnetic heating was measured on two characteristic examples: the magnetite nanoparticles conventionally used in medicine and polymer coating with micrometer sized magnetite particles. The saturation of the heating power with frequency is shown that is more pronounced for the second case of microparticles.

scholarly journals Size dependent heat generation of magnetite nanoparticles under AC magnetic field for cancer therapy

2008 ◽  
Vol 6 (1) ◽  
pp. 4 ◽  
Author(s):  
Jun Motoyama ◽  
Toshiyuki Hakata ◽  
Ryuji Kato ◽  
Noriyuki Yamashita ◽  
Tomio Morino ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Cancer Therapy ◽  
Heat Generation ◽  
Magnetite Nanoparticles ◽  
Ac Magnetic Field ◽  
Size Dependent

scholarly journals Phase Structure and Heat Generation in the Co-Precipitated Magnetite Nanoparticles

2017 ◽  
Vol 131 (5) ◽  
pp. 1217-1221
Author(s):  
P. Pawlik ◽  
M. Pruba ◽  
K. Pawlik ◽  
K. Kotynia
Keyword(s):  
Heat Generation ◽  
Magnetite Nanoparticles ◽  
Phase Structure

Heat Generation and Transport in the Earth

2010 ◽  
Author(s):  
Claude Jaupart ◽  
Jean-Claude Mareschal
Keyword(s):  
Heat Generation ◽  
The Earth

On the Frequency-Dependence of the Chirality Pseudoscalar of a Chiral Medium

1995 ◽  
Vol 5 (7) ◽  
pp. 913-918 ◽  
Author(s):  
Frédéric Guérin ◽  
Akhlesh Lakhtakia
Keyword(s):  
Frequency Dependence ◽  
Chiral Medium

Frequency-dependence of the magnetic transverse relaxation in a random anisotropy system: a-DyNi

1989 ◽  
Vol 50 (1) ◽  
pp. 91-98 ◽  
Author(s):  
B. Dieny ◽  
X. Labouze ◽  
B. Barbara ◽  
G. Pillion ◽  
J. Filippi
Keyword(s):  
Frequency Dependence ◽  
Transverse Relaxation ◽  
System A ◽  
Random Anisotropy

FREQUENCY DEPENDENCE OF ACOUSTIC SATURATION IN SMOKY QUARTZ

1981 ◽  
Vol 42 (C6) ◽  
pp. C6-99-C6-101
Author(s):  
R. Nava ◽  
M. Rodríguez
Keyword(s):  
Frequency Dependence
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