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Volume 20, Issue 4
Displaying 1-11 of 11 articles from this issue
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Shunichi SATO, Tomoaki SHIMADA, Miya ISHIHARA, Tsunenori ARAI, Takemi ...1999 Volume 20 Issue 4 Pages 323-332
Published: 1999
Released on J-STAGE: September 24, 2012
JOURNAL FREE ACCESSWith an OPO (optical parametric oscillator), ablation characteristics have been investigated in vitro for the porcine myocardium tissue in the spectral range 230-400nm. It was found that the ablation efficiency abruptly increased in the spectral range shorter than 300nm and the thermal damage was minimized at the shortest wavelength tested, i. e., 230nm. Based on the absorption characteristics of the tissue, qualitative discussion was given on the experimental results. Tissue fragmentation was also observed near the ablation walls, which suggested the photo-acoustic effect in the ablation mechanism.View full abstractDownload PDF (1298K) -
Yasuhide NAKAYAMA, Takehisa MATSUDA1999 Volume 20 Issue 4 Pages 333-344
Published: 1999
Released on J-STAGE: September 24, 2012
JOURNAL FREE ACCESSDownload PDF (3204K) -
[in Japanese]1999 Volume 20 Issue 4 Pages 345
Published: 1999
Released on J-STAGE: September 24, 2012
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Yasumitsu MIYAZAKI, Hideki SASAKI1999 Volume 20 Issue 4 Pages 347-355
Published: 1999
Released on J-STAGE: September 24, 2012
JOURNAL FREE ACCESSOptical measurement of biological tissue has the advantages such as noninvasiveness, ability of simultaneous recording from multiple sites. In this paper, results based on fluorescence measurement of carp's cardiac muscle cells using laser light are presented. These include the following; studies on the removal of motion artifact from fluorescent signal by simultaneous recording of two wavelength (fluorescence and reflection), multi-site recording of transmembrane potential using Acousto-Optical modulator and optical fiber bundle, simultaneous recording of transmembrane potential and Ca2+ density, and numerical analysis of optical microprobe for near-field microscope.View full abstractDownload PDF (901K) -
Hideo KOJIMA, Masahiro TAWATA, Hiroshi SHIMOYAMA, Masaya HARADA, Takes ...1999 Volume 20 Issue 4 Pages 357-366
Published: 1999
Released on J-STAGE: September 24, 2012
JOURNAL FREE ACCESSThis paper gives a review of several novel microscopes utilizing laser beam, such as confocal laser-scanning microscope, scanning near-field optical microscope and photo-acoustic microscope. The physical principles and remarkable features of these microscopes are described together with some typical applications.View full abstractDownload PDF (1766K) -
Takashi TSUBOI, Susumu TERAKAWA1999 Volume 20 Issue 4 Pages 367-372
Published: 1999
Released on J-STAGE: September 24, 2012
JOURNAL FREE ACCESSOptical trapping of dielectric particles with a single laser beam is called “optical tweezers”. This technique is based on the concept of negative light pressure due to a gradient force. Trapping in water has been observed for macromolecules, colloids, biological particles and cells over the entire range of particle size from 10 p m to 20nm.Application of this trapping method to cell physiology and cell biology is described.View full abstractDownload PDF (721K) -
Eiji TOBA1999 Volume 20 Issue 4 Pages 373-379
Published: 1999
Released on J-STAGE: September 24, 2012
JOURNAL FREE ACCESSThe main aim of this paper is to present a new sensing method of vital sign for simultaneously monitoring heart and respiratory rates. A new method, which uses a fiber-optic probe to monitor heart and respiratory rates simultaneously, has been developed and discussed. As a result, measurement accuracy of this sensor is ± 1.50 bpm in heart rates and ± 0.93bpm in respiratory rates. A new type of health monitoring vital sign sensor can be used at hospital as well as in other environments, and the method is convenient to use.View full abstractDownload PDF (717K) -
Jun INOUCHI1999 Volume 20 Issue 4 Pages 381-389
Published: 1999
Released on J-STAGE: September 24, 2012
JOURNAL FREE ACCESSRecently various and new research methods in addition to the technique of the neurobiology using conventional micro-electrode have been introduced into the research of the brain science field. The imaging of the neural activity by optical measurement method with high spatial and temporal resolution is also the one. This technique is useful for studying the mechanisms of synaptic integration in the dendrite of neuron, the functional organization and the correlate activity between different regions in the brain. Recent progress in understanding the principles and mechanisms of brain function is provided important contributions by optical imaging of naturally evoked dynamic response patterns in the intact brain in vivo.View full abstractDownload PDF (1048K) -
Kohtaro Kamino, Yoko Momose-Sato, Katsushige Sato1999 Volume 20 Issue 4 Pages 391-403
Published: 1999
Released on J-STAGE: September 24, 2012
JOURNAL FREE ACCESSOptical techniques using voltage-sensitive dyes and photodiode arrays have made it possible to monitor electrical/voltage-activity simultaneously from multiple-site in living systems such as central nervous and other systems. In this article, we review recent advances of optical recording-/imaging-studies of transmembrane voltage activity in neural systems.View full abstractDownload PDF (1857K) -
Tetsuo UDAGAWA, Susumu OSHIRO1999 Volume 20 Issue 4 Pages 405-416
Published: 1999
Released on J-STAGE: September 24, 2012
JOURNAL FREE ACCESS -
1999 Volume 20 Issue 4 Pages 417-423
Published: 1999
Released on J-STAGE: September 24, 2012
JOURNAL FREE ACCESSDownload PDF (930K)
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