고분화 화강암에서의 Eu 동위원소 분별작용

이승구(Seung-Gu Lee),Tsuyoshi Tanaka 대한지질학회 2021 대한지질학회 학술대회 Vol.2021 No.10

희토류원소중의 하나인 Eu은 자연계에서 2가, 3가와 같이 2개의 산화수를 갖고 있고, 아울러 두개의 동위원소(<SUP>151</SUP>Eu, <SUP>153</SUP>Eu)만을 갖고 있다. 그리고 운석으로 규격화한 암석내 희토류원소 분포도는 화성암의 진화사 즉 분화도를 이해하기위한 중요한 인자 중의 하나이다. 그리고 고분화 화강암 중 일부는 그 함량을 원시운석으로 규격화하였을 때 ‘희토류원소의 테트라드 효과’라 불리우는 독특한 희토류원소 분포도와 더불어 Eu의 부(-)의 이상이 매우 큰 지구화학적 특징을 보여준다. 최근 Lee and Tanaka (2019, 2021a)는 희토류원소 중의 하나인 Eu의 안정동위원소의 새로운 분석법의 개발과 더불어 토대로 분화된 화강암에서의 Eu 동위원소의 분별작용을 보고하였다(2021B). 이 발표에서는 고분화 화강암과 분화도가 크지 않은 화강암에서의 희토류원소 분포도의 특성과 Eu 동위원소비의 차이(즉 동위원소 분별작용)을 활용하여, 희토류원소 테트라드 효과의 발달정도-화강암질 마그마의 분화도-Eu의 이상의 크기 변화 그리고 Eu 동위원소 분별작용의 발생도를 비교함으로써 희토류원소의 테트라드 효과의 형성과정과 Eu의 부(-)의 이상의 형성과정의 선후관계에 대해 토의하고자 한다. Lee, S.-G. and Tanaka, T., 2019, Determination of Europium isotopic ratio by multi-collector inductively coupled plasma mass spectrometry using a Sm internal standard, Spectrochim. Acta Part B, 156, 42-50. Lee, S.-G. and Tanaka, T., 2021a, Gd matrix effects on Eu isotope fractionation using MC-ICP-MS: Optimizing Europium isotope ratio measurements in geological rock samples. Int. J. Mass. Spec., 116668. Lee, S.-G. and Tanaka, T., 2021b, Eu isotope fractionation in highly fractionated igneous rocks with large Eu negative anomaly Geochem. J., 55(4), e9-e17.

Molecula Aspects of GM2 Gangliosidosis Type B

Tanaka, Akemi The Korean Society of Inherited Metabolic Disease 2003 대한유전성대사질환학회지 Vol.3 No.1

對馬島と韓半島南海岸地域との海上交涉

( Tanaka Soichi ) 東亞大學校附設 石堂傳統文化硏究院 2013 石堂論叢 Vol.0 No.55

쓰시마는 한반도 남해안 지역과 일본열도 서북규슈지역 사이의 해협에 위치하고 있으며 한일 교섭에 있어서 중요한 역할을 해 왔다. 본고에서는 승문시대부터 고분시대에 걸쳐 쓰시마와 한반도 남해안 지역과의 교섭에 대해 통시적으로 개관하고 교섭에 관한 자료의 양상을 검토했다. 승문시대에는 조기부터 교류가 인정되며, 쓰시마와 한반도 남해안지역과는 계속적인 교섭관계를 유지한 것으로 보이는데 그 과정에서 어로활동의 전개와 식량이나 흑요석 등 생활물자의 입수를 목적으로 시기적인 교류의 강약이나 방향성이 존재한 것을 추측해 볼 수 있다. 미생시대에는 만을 중심으로 한 취락을 단위로 제각기 교섭이 이루어진 것으로 보인다. 풍부한 박재품들이 입수된 배경에는 한반도 남해안 지역과 북부구주지역 사이에 위치하고 있는 쓰시마의 지리적 이점을 살린 중계무역이 존재했다고 생각한다. 고분시대에도 섬의 대부분 지역에서는 아마도 미생시대와 크게 다르지 않은 형태로 교류·교역활동이 이루어졌을 것으로 생각된다. 한편 섬 남부의 일부 지역에서는 각 지역의 집단과 기나이정권이 관계를 맺고 교류·교역활동이 이루어지고 있었다고 생각된다. 즉 종래의 교류·교역관계를 계속한 집단과 기나이정권과 관계를 맺으면서 동시에 조직적인 교섭관계 속으로 편입된 집단이 병존한 사회적 이중구조가 존재했을 가능성을 추측해 볼 수 있다. 이처럼 쓰시마는 서북규슈지역과 한반도 남해안지역 사이에 위치해독자적인 위치를 유지하면서 아울러 주변 지역과의 교섭관계를 가지고 양 지역의 사회·경제적인 요구에 응하는 형태로 교섭활동에서 중요한 역할을 수행해 온 것을 알 수 있다. Tsushima Island is located in the Straits between Southern coastal area of Korean peninsula and Northwest Kyushu area of Japanese Islands, and has played an important role in the Korea-Japan exchanges. In this text, it took a diachronic general view of the exchanges on the Tsushima Island at Jomon-Kofun period with Southern coastal area of Korean peninsula, and examined regarding the material related to the exchanges. After the early Jomon period, Tsushima Island and Southern coastal area of Korean peninsula had been maintained continuous exchange relationships. In this progress, you can guess that strength or direction existence of exchanges, for the purpose of the deployment of fishing activity and the obtainment of everyday goods such as foods and obsidian. In Yayoi period, it seems that the exchange was done respectively with the settlement around the bay as a unit. The background of abundant imported goods is due to transit trade utilizing the geographical advantages of Tsushima Island, located between Southern coastal area of Korean peninsula and Northern Kyushu area of Japanese Islands. Also Kofun period, most parts of the island; it can suppose that exchange and trade activity has been engaged as Yayoi period. On the other hand, each group in some southern regions of the island made a relationship with Kinai regime, and conducted exchange and trade activities. It can guess that there is a possibility that social “dual structure” existed, because there were two groups, one is continued the conventional exchange/trade relation and the other is incorporated into systematic exchange-relationship connecting a relation to the Kinai regime. As a conclusion, Tsushima Island had kept the exchange relationship with the surrounding area while maintaining their own position between Northwest Kyushu area of Japanese Islands and Southern coastal area of Korean peninsula.

Influence of Robot-Assisted Gait Training on Lower-Limb Muscle Activity in Patients With Stroke: Comparison With Conventional Gait Training

Tanaka Naoki,Yano Hiroaki,Ebata Yasuhiko,Ebihara Kazuaki 대한재활의학회 2023 Annals of Rehabilitation Medicine Vol.47 No.3

Objective To measure muscle activity before and after robot-assisted gait training (RAGT) in patients with stroke and examine the differences in muscle activity changes compared with conventional gait training (CGT).Methods Thirty patients with stroke (RAGT group, n=17; CGT group, n=13) participated in the study. All patients underwent RAGT using a footpad locomotion interface or CGT for 20 minutes for a total of 20 sessions. Outcome measures were lower-limb muscle activity and gait speed. Measurements were performed before the start of the intervention and after the end of the 4-week intervention.Results The RAGT group showed increased muscle activity in the gastrocnemius, whereas the CGT group showed high muscle activity in the rectus femoris. In the terminal stance of the gait cycle, the gastrocnemius, the increase in muscle activity was significantly higher in the RAGT group than in the CGT group.Conclusion The results suggest that RAGT with end-effector type is more effective than CGT to increase the gastrocnemius muscle activity.

THE EFFECTS OF PROSTAGLANDINS AND INDOMETHACIN ON OVULATION IN THE PERFUSED FOWL OVARY

Tanaka, K.,Higuchi, T.,Tawarazumita, M.,Hertelendy, F. Asian Australasian Association of Animal Productio 1992 Animal Bioscience Vol.5 No.1

The effects of prostaglandins (PG) and indomethacin, a PG synthesis inhibitor, on ovulation in the perfused fowl ovary were studied. Laying hens were killed by cutting the jugular vein 18-19 h before expected ovulation of the second follicle of a clutch sequence. The cannulated ovary was dissected free and connected with a recycling perfusion apparatus. Agents to be studied for their effects on ovulation were added to the perfusion fluid. $PGF_{2{\alpha}}$ at 0.1 and 1 mg/l induced ovulation, with a success rate of 25% and 30%, respectively. The same doses of $PGE_2$ were effective at 60% and 63%, respectively. Indomethacin partially blocked gonadotrophin-induced ovulation. It is suggested that PGs may play a supportive role in the process of follicular rupture in the domestic fowl.

Selective substrate uptake: The role of ATP-binding cassette (ABC) importers in pathogenesis

Tanaka, Kari J.,Song, Saemee,Mason, Kevin,Pinkett, Heather W. Elsevier 2018 Biochimica et biophysica acta, Biomembranes Vol.1860 No.4

<P><B>Abstract</B></P> <P>The uptake of nutrients, including metals, amino acids and peptides are required for many biological processes. Pathogenic bacteria scavenge these essential nutrients from microenvironments to survive within the host. Pathogens must utilize a myriad of mechanisms to acquire these essential nutrients from the host while mediating the effects of toxicity. Bacteria utilize several transport proteins, including <U>A</U>TP-<U>b</U>inding <U>c</U>assette (ABC) transporters to import and expel substrates. ABC transporters, conserved across all organisms, are powered by the energy from ATP to move substrates across cellular membranes. In this review, we will focus on nutrient uptake, the role of ABC importers at the host–pathogen interface, and explore emerging therapies to combat pathogenesis. This article is part of a Special Issue entitled: Beyond the Structure-Function Horizon of Membrane Proteins edited by Ute Hellmich, Rupak Doshi and Benjamin McIlwain.</P>

Recent Studies on the Chemistry of Ginseng Saponins

Tanaka, Osamu The Korean Society of Ginseng 1977 Journal of Ginseng Research Vol.2 No.1

Influence of Distance from Home to Hospital on Survival among Lung Cancer Patients

Tanaka, Rina,Matsuzaka, Masashi,Nakaji, Shigeyuki,Sasaki, Yoshihiro Asian Pacific Journal of Cancer Prevention 2016 Asian Pacific journal of cancer prevention Vol.17 No.11

The objective of this study was to clarify how distance from place of residence to the nearest specialist cancer hospital affects the survival of lung cancer patients and the treatment received. For all patients diagnosed with lung cancer in the Aomori cancer registry database for the period from 2009 to 2011 (n=3,986). The distance to the treating hospital was measured as the straight line from a person's place of residence, and compared with findings from the Ederer II method for calculating relative survival. Information on treatments given was obtained by data extraction. We defined a hospital having respiratory medicine as specialist, while all private hospitals and clinics were included in the general category. Patients attending specialist hospitals numbered 2,548 (67.0%), and those treated at general institutions were 1,255 (33.0%). The patients who had the lowest relative survival with localized lesions lived <20 km from general hospitals and clinics. With more advanced stages, relative survival of those living <20 km from a specialist hospital was the lowest. Although the survival rate was not affected by the distance between place of residence and hospital, even when patients are diagnosed at a localized stage at a general hospital or clinic within 20 km from their home, they did survive longer in comparison with patients diagnosed at a specialist hospital.

초전도산업의 미래 전망

Tanaka, Shoji 한국분말야금학회 1995 한국분말재료학회지 (KPMI) Vol.2 No.1

Non-inductive initiation of closed flux surfaces by ECH/ECCD on KSTAR using an oblique fundamental O-mode injection from the low-field side

Tanaka, H.,Uchida, M.,Maekawa, T.,Bae, Y.-S.,Joung, M.,Jeong, J.H. IOP 2016 Nuclear fusion Vol.56 No.4

<P>An experiment on non-inductive plasma current start-up by electron cyclotron (EC) heating and current drive (ECH/ECCD) has been carried out on KSTAR by injecting the fundamental O-mode wave from the low-field side obliquely to the toroidal magnetic field. A plasma current up to 14.5 kA is generated by 180 kW of 84 GHz microwave power and the magnetic measurement shows the formation of a large last-closed flux surface with a diameter of 0.4 m. The soft x-ray emission profile and fast CCD images also support the existence of closed flux surfaces. The current of the cross-field-passing electrons (CFPEs) is calculated according to the paper <I>Nucl. Fusion</I> <B>52</B> 083008 in these experimental conditions, and it is shown that a CFPE current can produce the initial closed flux surfaces. The observed large increase of EC emission supports the generation of energetic electrons, like CFPEs. After the formation of the closed flux surfaces, the pressure-driven current and CFPE current do not flow in the closed flux surfaces. EC-driven current should flow in these surfaces and ramp up the plasma current. It is estimated that an EC-driven current of about one third of the total plasma current flows in the closed flux surface at the last stage.</P>