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Ohara, M.,Cho, Y.B.,Ahn, K.J. Korean Biodiversity Information Facility 2016 Journal of Asia-Pacific biodiversity(Online) Vol.9 No.4
A total of 25 species in 13 genera of the family Histeridae is identified from the collection of the Natural History Museum, Hannam University. Margarinotus (Paralister) koreanus sp. nov. is described with illustrations of the diagnostic characters. Margarinotus (Ptomister) reichardti is newly recorded in South Korea and the South Korean record of Platysoma deplanatum is confirmed.
Serotonin regulates glucose-stimulated insulin secretion from pancreatic β cells during pregnancy
Ohara-Imaizumi, Mica,Kim, Hail,Yoshida, Masashi,Fujiwara, Tomonori,Aoyagi, Kyota,Toyofuku, Yukiko,Nakamichi, Yoko,Nishiwaki, Chiyono,Okamura, Tadashi,Uchida, Toyoyoshi,Fujitani, Yoshio,Akagawa, Kimio National Academy of Sciences 2013 PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF Vol.110 No.48
<P>In preparation for the metabolic demands of pregnancy, beta cells in the maternal pancreatic islets increase both in number and in glucose-stimulated insulin secretion (GSIS) per cell. Mechanisms have been proposed for the increased beta cell mass, but not for the increased GSIS. Because serotonin production increases dramatically during pregnancy, we tested whether flux through the ionotropic 5-HT3 receptor (Htr3) affects GSIS during pregnancy. Pregnant Htr3a(-/-) mice exhibited impaired glucose tolerance despite normally increased cell mass, and their islets lacked the increase in GSIS seen in islets from pregnant wild-type mice. Electrophysiological studies showed that activation of Htr3 decreased the resting membrane potential in beta cells, which increased Ca2+ uptake and insulin exocytosis in response to glucose. Thus, our data indicate that serotonin, acting in a paracrine/autocrine manner through Htr3, lowers the beta cell threshold for glucose and plays an essential role in the increased GSIS of pregnancy.</P>
Ohara, Sayaka,Nishimura, Akiko,Tachikawa, Satoshi,Iijima, Takehiko The Korean Dental Society of Anesthsiology 2020 Journal of Dental Anesthesia and Pain Medicine Vol.20 No.3
Background: Postoperative fluid retention is a factor that causes delay in recovery and unexpected adverse events. It is important to prevent intraoperative fluid retention, which is putatively caused by intraoperative release of stress hormones, such as ADH (anti-diuretic hormone) or others. We hypothesized that intraoperative analgesia may prevent pathological fluid retention. We retrospectively explored the relationship between analgesics and in-out balance in surgical patients from anesthesia records. Methods: Anesthetic records of 80 patients who had undergone orthognathic surgery were checked in this study. Patients were anesthetized with either TIVA (propofol and remifentanil) or inhalational anesthesia (sevoflurane and remifentanil). During surgery, acetated Ringer's solution was infused for maintenance at a rate of 3-5 ml/kg/h at the discretion of the anesthetist. The perioperative parameters, including the amount of crystalloid and colloid infused, and the amount of urine and bleeding were checked. Furthermore, we checked the amount and administration rate of remifentanil during the surgical procedure. The correlation coefficient between the remifentanil dose and the in-out balance or the urinary output was analyzed using the Pearson correlation coefficient. The contributing factor to fluid retention, including urinary output, was statistically examined by means of multivariate logistic regression analysis. Results: A significant positive correlation was found between remifentanil dose and urinary output. Urinary output less than 0.04 ml/kg/min was suggested to cause positive fluid balance. Although in-out balance approaches zero balance with increase in remifentanil administration rate, no contributing factor for near-zero fluid balance was statistically picked up. The remifentanil administration rate was statistically picked up as the significant factor for higher urinary output (> 0.04 ml/kg/min) (OR, 2,644; 95% CI, 3.2-2.2 × 10<SUP>6</SUP>) among perioperative parameters. Conclusions: In conclusion, remifentanil contributes in maintaining the urinary output during general anesthesia. Although further prospective study is needed to confirm this hypothesis, it was suggested that fluid retention could be avoided through suppressing intraoperative stress response by means of appropriate maintenance of remifentanil infusion rate.
MOLECULAR-SCALE VIEW OF HEAT CONDUCTION IN LIQUIDES, SOFT MATTERS, AND THEIR INTERFACES
Taku Ohara 대한기계학회 2019 대한기계학회 춘추학술대회 Vol.2019 No.5
Thermal energy transfer in liquids and soft matters, which is recognized as heat conduction in case of macroscopic bulk materials, is discussed utilizing molecular dynamics (MD) simulations. An analytical approach based on the concept of the decomposition of heat flux was applied to several typical liquids and soft matters, where each contribution of molecular=scale energy transfer mechanisms to heat conduction flux was evaluated. The paths that transfer thermal energy between and within molecules due to interatomic forces, such as van der Waals force, Coulomb force and covalent bond force, were identified as the atomistic heat path (AHP), and their performance to transfer thermal energy with their number density in space was evaluated. Analysis based on this concept is also applied to thermal energy transfer over the solid-liquid interfaces, aiming at reduction of thermal resistance in solid-liquid/soft matter complex systems.
Masahiro Ohara,조영복,안기정 국립중앙과학관 2016 Journal of Asia-Pacific Biodiversity Vol.9 No.4
A total of 25 species in 13 genera of the family Histeridae is identified from the collection of the Natural History Museum, Hannam University. Margarinotus (Paralister) koreanus sp. nov. is described with illustrations of the diagnostic characters. Margarinotus (Ptomister) reichardti is newly recorded in South Korea and the South Korean record of Platysoma deplanatum is confirmed