Takafumi Ogawa, T. Shimayoshi, N. Kida, T. Adachi, T. Matsuda
{"title":"An effect of meshing on coupling simulation of left ventricular wall motion","authors":"Takafumi Ogawa, T. Shimayoshi, N. Kida, T. Adachi, T. Matsuda","doi":"10.11239/JSMBE.52.O-186","DOIUrl":"https://doi.org/10.11239/JSMBE.52.O-186","url":null,"abstract":"","PeriodicalId":39233,"journal":{"name":"Transactions of Japanese Society for Medical and Biological Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2014-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81561482","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Takahiro Enomoto, M. Kitama, Hisae O. Shimizu, Masaji Yamashita, Junji Arisawa, Yoshinori Tanaka, K. Shimizu
{"title":"内シャント光イメージングのための基礎的検討：2 －点拡がり関数を利用した血管内径変化の検出－","authors":"Takahiro Enomoto, M. Kitama, Hisae O. Shimizu, Masaji Yamashita, Junji Arisawa, Yoshinori Tanaka, K. Shimizu","doi":"10.11239/JSMBE.52.O-121","DOIUrl":"https://doi.org/10.11239/JSMBE.52.O-121","url":null,"abstract":"","PeriodicalId":39233,"journal":{"name":"Transactions of Japanese Society for Medical and Biological Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2014-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88050169","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
We have been studying usefulness of image subtraction Schlieren technique that visualizes ultrasound fields. Also, in studies of the adverse effect of ultrasound exposure on cells, a culture dish is used as an exposure chamber with an ultrasound transducer placed beneath the dish. In this exposure setup, a standing wave field is produced inside the chamber, and change in shape of the chamber causes change in the standing wave fields. In this study, standing wave fields generated inside small chambers with different shapes were visualized using our technique, and the relation between acoustic fields and production of free radicals that cause cell damage was investigated.
{"title":"Visualization of ultrasound standing wave fields generated inside small chamber for study on adverse effect of ultrasound exposure on cells","authors":"Koki Sumiyoshi, Daiki Sekine, N. Kudo, K. Shimizu","doi":"10.11239/JSMBE.52.O-343","DOIUrl":"https://doi.org/10.11239/JSMBE.52.O-343","url":null,"abstract":"We have been studying usefulness of image subtraction Schlieren technique that visualizes ultrasound fields. Also, in studies of the adverse effect of ultrasound exposure on cells, a culture dish is used as an exposure chamber with an ultrasound transducer placed beneath the dish. In this exposure setup, a standing wave field is produced inside the chamber, and change in shape of the chamber causes change in the standing wave fields. In this study, standing wave fields generated inside small chambers with different shapes were visualized using our technique, and the relation between acoustic fields and production of free radicals that cause cell damage was investigated.","PeriodicalId":39233,"journal":{"name":"Transactions of Japanese Society for Medical and Biological Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2014-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83234607","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Myocardium contracts against ventricular wall stretch that comes along with ventricular filling. Mitochondria generate required ATP for the myocardial contraction. It is well known that mitochondrial ATP production process is one of the sources of reactive oxygen species (ROS). ROS are known as toxic molecules, but also important physiological regulators of intracellular signaling pathways. In the present study, we investigate the relation between myocardial stretch and mitochondrial ROS production, and discuss the role of mitochondria on myocardial response to stretch. Isolated mouse ventricular myocytes were exposed to 10% axial stretch using carbon fiber technique. ROS production was studied using DCF-loaded cells. Axial stretch significantly increased ROS production. Applying , indicating mitochondrial ROS production is stretch-sensitive. The present results suggest that stretch enhances electron transport chain to prepare for the more ATP production for the more preloaded, namely, the more energy-consuming contraction.
{"title":"Effects of axial stretch on mitochondrial reactive oxygen species in cardiac myocytes","authors":"G. Iribe, K. Kaihara, Y. Yamaguchi, K. Naruse","doi":"10.11239/JSMBE.52.SY-44","DOIUrl":"https://doi.org/10.11239/JSMBE.52.SY-44","url":null,"abstract":"Myocardium contracts against ventricular wall stretch that comes along with ventricular filling. Mitochondria generate required ATP for the myocardial contraction. It is well known that mitochondrial ATP production process is one of the sources of reactive oxygen species (ROS). ROS are known as toxic molecules, but also important physiological regulators of intracellular signaling pathways. In the present study, we investigate the relation between myocardial stretch and mitochondrial ROS production, and discuss the role of mitochondria on myocardial response to stretch. Isolated mouse ventricular myocytes were exposed to 10% axial stretch using carbon fiber technique. ROS production was studied using DCF-loaded cells. Axial stretch significantly increased ROS production. Applying , indicating mitochondrial ROS production is stretch-sensitive. The present results suggest that stretch enhances electron transport chain to prepare for the more ATP production for the more preloaded, namely, the more energy-consuming contraction.","PeriodicalId":39233,"journal":{"name":"Transactions of Japanese Society for Medical and Biological Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2014-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91341212","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Koki Yoshida, Rami Abuhabsah, D. Pawlicki, Joe Shikama, Ryo Nagaoka, M. Arakawa, Kazuto Kobayashi, Y. Saijo, D. O'brien
{"title":"Measurement of acoustic parameters of single cell by ultrasound microscope","authors":"Koki Yoshida, Rami Abuhabsah, D. Pawlicki, Joe Shikama, Ryo Nagaoka, M. Arakawa, Kazuto Kobayashi, Y. Saijo, D. O'brien","doi":"10.11239/JSMBE.52.O-341","DOIUrl":"https://doi.org/10.11239/JSMBE.52.O-341","url":null,"abstract":"","PeriodicalId":39233,"journal":{"name":"Transactions of Japanese Society for Medical and Biological Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2014-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89613253","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Effects of physiological environment on tribological behavior of prosthetic joint materials","authors":"Y. Sawae, T. Murakami, S. Yarimitsu, K. Nakashima","doi":"10.11239/JSMBE.52.PD-5","DOIUrl":"https://doi.org/10.11239/JSMBE.52.PD-5","url":null,"abstract":"","PeriodicalId":39233,"journal":{"name":"Transactions of Japanese Society for Medical and Biological Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2014-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74580825","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Muscle contraction evaluation by the simultaneous measurement of MMG and EMG","authors":"H. Oka, Y. Konishi","doi":"10.11239/JSMBE.52.O-235","DOIUrl":"https://doi.org/10.11239/JSMBE.52.O-235","url":null,"abstract":"","PeriodicalId":39233,"journal":{"name":"Transactions of Japanese Society for Medical and Biological Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2014-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79696408","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"System Identification of Evoked Mechanomyogram in Isometric Contraction","authors":"Yasuhiro Shinada, T. Uchiyama","doi":"10.11239/JSMBE.52.O-162","DOIUrl":"https://doi.org/10.11239/JSMBE.52.O-162","url":null,"abstract":"","PeriodicalId":39233,"journal":{"name":"Transactions of Japanese Society for Medical and Biological Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2014-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84386606","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"細胞親和性を有するa-C:H被膜の血液適合性評価","authors":"大越 康晴, 白石 泰之, 三浦 英和, 平栗 健二, 昭夫 舟久保, 山家 智之, 福井 康裕","doi":"10.11239/JSMBE.52.O-204","DOIUrl":"https://doi.org/10.11239/JSMBE.52.O-204","url":null,"abstract":"","PeriodicalId":39233,"journal":{"name":"Transactions of Japanese Society for Medical and Biological Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2014-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81335838","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The purpose of this study is to investigate the relation between stiffness and the elbow joint angle. A mechanomyogram (MMG) was recorded from biceps brachii muscle at three different elbow angles: 90, 120, and 150 degrees. The biceps brachii muscle was electrically stimulated and its mechanomyogram was measured with an acceleration sensor attached to the skin of the belly of the biceps brachii muscle. The transfer functions from the stimulation to the MMG were identified by the singular value decomposition method, and the natural frequency was derived from the transfer function. As a result, the MMG was approximated with a fourth-order model. The lowest natural frequency increased as the elbow joint angle increased. It was concluded that biceps brachii muscle stiffness increased as the elbow joint angle increased.
{"title":"Elbow joint angle dependency of biceps brachii muscle stiffness with an aid of system identification of mechanomyogram","authors":"Y. Itabashi, T. Uchiyama","doi":"10.11239/jsmbe.52.O-164","DOIUrl":"https://doi.org/10.11239/jsmbe.52.O-164","url":null,"abstract":"The purpose of this study is to investigate the relation between stiffness and the elbow joint angle. A mechanomyogram (MMG) was recorded from biceps brachii muscle at three different elbow angles: 90, 120, and 150 degrees. The biceps brachii muscle was electrically stimulated and its mechanomyogram was measured with an acceleration sensor attached to the skin of the belly of the biceps brachii muscle. The transfer functions from the stimulation to the MMG were identified by the singular value decomposition method, and the natural frequency was derived from the transfer function. As a result, the MMG was approximated with a fourth-order model. The lowest natural frequency increased as the elbow joint angle increased. It was concluded that biceps brachii muscle stiffness increased as the elbow joint angle increased.","PeriodicalId":39233,"journal":{"name":"Transactions of Japanese Society for Medical and Biological Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2014-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89654457","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：