3D flexible Si based-composite (Si@Si₃N₄)/CNF electrode with enhanced cyclability and high rate capability for lithium-ion batteries

Kim, Si-Jin,Kim, Min-Cheol,Han, Sang-Beom,Lee, Gyu-Ho,Choe, Hui-Seon,Kwak, Da-Hee,Choi, Sun-Yong,Son, Byung-Goo,Shin, Myoung-Sun,Park, Kyung-Won Elsevier 2016 Nano energy Vol.27 No.-

<P><B>Abstract</B></P> <P>Despite extremely high capacity of Si-based anodes in lithium-ion batteries (LIB), Si-based materials have shown a structural collapse caused by a volumetric expansion/contraction during the cycling process. The conventional electrode structure, which consists of active materials, a current collector, a conducting agent, and a binder, actually showed a low loading of active material due to the other heavy components. In this study, we prepared a 3D flexible Si-composite electrode consisting of core (Si)-shell (Si<SUB>3</SUB>N<SUB>4</SUB>) NPs (Si@Si<SUB>3</SUB>N<SUB>4</SUB>) and carbon nanofibers (denoted as Si-composite/CNF). The Si-composite/CNF was directly utilized as an anode in the absence of the other components was electrochemically evaluated using a coin-type cell. The Si-composite/CNF showed a high capacity of 665mAhg<SUP>−1</SUP> at a fairly high current density of 10Ag<SUP>−1</SUP> and an extremely low capacity loss for 2000 cycles.</P> <P><B>Highlights</B></P> <P> <UL> <LI> We prepared Si-composite/CNF exhibits a 3D flexible Si-composite electrode. </LI> <LI> The electrode consists of core (Si)-shell (Si<SUB>3</SUB>N<SUB>4</SUB>) NPs (Si@Si<SUB>3</SUB>N<SUB>4</SUB>) and carbon nanofibers. </LI> <LI> The Si-composite/CNF was directly utilized as an anode. </LI> <LI> Si-composite /CNF exhibited high specific capacity and improved high rate cycling performance. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>

複合 韓藥劑 淸籬滋坎湯의 抗癌效果 및 作用機轉 糾明

Cho, Kyung-Sam,Kim, Si-Young,Park, Jai-Kyung,Choi, Seung-Hoon,Chung, Se-Young,Yoon, Hwi-Joong 경희대학교 동서의학연구소 1999 INTERNATIONAL SYMPOSIUM ON EAST-WEST MEDICINE Vol.1999 No.1

Kyung Sam Cho¹Si Young Kim¹, Jai Kyung Park²,Seung Hoon Choi³,Se Young Chung⁴, Hwi Joong Yoon¹¹College of Medicine, ²East-West Medical Research Institute, ³College of Oriental Medicine, ⁴College of Pharmacology, Kyung Hee University,Seoul, Korea. The Anti-cancer Effect of Oriental Medicine Chung-Ri-Ja-Gam-Tang in the Mouse with Metastatic Lung Cancer. Proceedings of International Symposium on East-West Medicine, Seoul. 231-243, 1999.-The oriental medicine Chung-Ri-Ja-Gam-Tang is an herbal medicine which has been used for pulmonary diseases and known as having immune stimulatory effects. It has been known effective in lung cancer. So we studied the effects and the mechanisms of this herbal medicine it the mouse with metastatic lung cancer. The metastatic lung cancer of the mouse was produced with melnoma cell line(B16BL/6).5×10□/mouse tumor cells were injected intravenously to the CDF1 mouse via tail vein. The mice were divided 4 groups. The first group was treated with 50mg/kg extract of Chung-Ri-Ja-Gam-Tang per oral for 10 days after cancer cell injection, second group treated with saline after cancer cell injection, the third group with medicine without cancer cell, and the last group with saline only. After 10 days treatments some of the mice were scarificed and the lung and spleen was removed. The survival duration, weight change, the number of metastatic cancer nodule of the lung, the NK cell activity, the capacity of cytokines(INF-γ,INF-α,IL-2) production and the proliferation activities of mouse lymphocytes were measured. The surival times of the group 1 mice were longer and the weight loss was less than the group 2 significantly. The number of the metastatic nodule of the lung were decresed in the group 1 than the group 2. The production of INF-γ,was increase in group 2 than group 3 and 4, IL-2 production was increased in group 1 than group 2,3,4 significantly. There was no difference in TNF- α production and proliferation activity of lymphocyte in each group. The NK cell activity was significantly increased in group 1 than group 2,3,4. We conclude that the Chung-Ri-Ja-Gam-Tang has the effect of increasing the NK cell activity of the CDF1 mouse with metastatic lung cancer(B16BL/6). And it is suggested that the increased production of the IL-2 is the mechanisms of enhanced NK cell activity.

燃料林造成에 關한 硏究 : 第2報 : 農山村農家一戶當 燃料林(아까시아나무)所要面積에 關한 調査硏究

金是璟,金在慶 진주산업대학교 1976 論文集 Vol.14 No.-

效果的인 燃料林造成을 爲한 適定燃料林 所要面積을 調査코자 1975年 2月∼1976年 5月까지 木校演習林(慶南 山淸郡 今西面)中 点生하고 있는 旣成燃料林分(아까시아)을 對象으로 하여 調査한바 그 結果를 要約하면 다음과 같다. 1). 8年生 根株에서 最大 및 最小萌芽本數는 各各 19本 및 5本이 發生되었으며, ha當 總本數는 28,280本으로 材積은 3.723㎥(2.98ton)로 調査되었다. 2). 5年生 根株에서 生立된 單幹狀의 本數는 ha當 2,890本으로 總材積은 15.895㎥(12.72ton)로서 年間 平均材積成長量은 3.974㎥(3.18ton)로 調査되었다. 3). 本調査에서는 燃料林(아까시아나무의 ha當 平均材積成長量이 3.974㎥(3.18ton)에 불과하나 合理的인 燃料林經營을 한다면 2∼3倍의 增收가 確實하며 또한 林産副産物 및 農業副産物을 燃料로 使用할 수 있으므로 農家一戶當 1ha의 燃料林을 造成하여 4年을 伐期로 連進帶狀皆伐法에 의해 萌芽更新을 實施한다면 農山村의 所要燃料量을 充當할 수 있을것으로 思料된다. This study was carried out to make the basic investigation fot the establishment of the fuel wood land from Feb. 1973 to May 1974. It was attempted to investigate the year fuel consumption for a standard farm house at the mountain village, farm land village, and the suburban farm village, and also to investigate the requirement of appropriate area of the fuel wood land, and it was investigated at the stand of Robinia pseudoacacia L. scattered in college forest located San Cheong, Kyung Nam. The results were summarized as follows. 1). The number of the maximum and minimum 8 year's sprouts which were grown at the root stock of Robinia pseudoacacia L. was 19 trees and 5 trees each. The number of the total tree per one hectare were 28,28O trees, and the volume of those were 3.723㎥(2.98tons). 2). The number of one stem form tree grown 5year's root stock of Robinia pseudoacacia L. was 2,980 trees, per one hectare. The total volume of the those was 15,895㎥(12.72tons), and the average year growth of volume was 3,974㎥(3.2tons). 3). The average year growth of Robinia pseudoacacia L. will be increased more than twice or three times comparing to the above through the more effective management of the fuel wood 1and, and when the four year term for final cutting are fol1owed the sprout reproduction by the progressive clear cutting in strip, and the by-products of agriculture and forest are used for the fuel, One hectare of the fuel wood land will be enough to the average year fuel consumption needed for the mountain and farm land village.

급성신부전을 동반한 알콜성 횡문근융해증 2례

김영민,오동렬,이원재,김형국,황두영,이환,최경호,정시경,김세경,김영옥 大韓應急醫學會 1998 대한응급의학회지 Vol.9 No.4

Rhabdomyolysis is a biochemical and clinical syndrome caused by lysis of skeletal muscle cell and release of muscle cell contents into the circulation. In addition to traumatic cause, various nontraumatic causes have been reported. Rhabdomyolysis has frequently been associated with seamy aspects of life and society: alcoholic abuse, drug addiction, sadistic drill exercise, war events and attempted suicide. The abuse of alcohol causes many hazards in many organs. One of these is acute alcoholic myopathy that may present as a fulminent syndrome of muscle pain and tenderness associated with rhabdomyolysis and acute renal failure. Because the prognosis of adequately treated rhabdomyolysis is excellent, early recognition and prompt management are essential in emergency situation. We experienced two typical cases of alcohol-induced rhabdomyolysis with acute renal failure and report these cases with literature review.

서울의 Penicillinase Producing Neisseria Gonorrhoeae 발생빈도(1994)

김재홍,안진균,정성재,김영태,김중환,김시영,이석종,이홍렬,서호석,김경훈,권혁진,정우권,고우석,이용석,안필수,오준규,오용섭 대한화학요법학회 1996 대한화학요법학회지 Vol.14 No.1

Background : In recent years gonorrhoea has been panendemic and remains one of the most common Sexually Transmitted Diseases in the world, especially in developing countries. Objective & Method : For the detection of a more effective therapeutic regimen and assessing the prevalence of Penicillinase Producing Neisseria Gonorrhoeae(PPNG), Ive have been trying to study the patients who have visited the VD Clinic of Choong-Ku Public Health Center in Seoul since 1980 by means of the chromogenic cephalosporin method. Results : In 1994, 168 strains of N. gonorrhoeae were isolated, among which 109 (64,9% ) were PPNG. Conclustion : Our results suggests that the prevalence of PPNG in Seoul is still increasing.

응급의료센터에서 신경색의 조기진단

최경호,오동렬,이원재,박규남,박승현,황두영,김형국,정시경,김영민,김세경 大韓應急醫學會 1998 대한응급의학회지 Vol.9 No.4

To evaluate appropriate diagnostic studies for renal infartion in emergency medical center, we analysed 33 patients of renal infarction treated in this hospital for last 8 years. Eleven patients, 4 trauma associated and 7 aortic disease associated patients were excluded. They are 11 males and 11 females with a mean age of 51 years. Fourteen came to the emergency medical center and seven came to the outpatient department, in the other one patient renal infarction was developed during hospitalization with other disease. On their past history they had hypertension in 9, valvular heart disease in 5, and diabetic mellitus in 4 patients. Abdominal or flank pain was noted in 17 of 22(77%). The other symptoms were vomiting, nausea, fever and so on. On microscopic examination of initial urine in hospital, 5 patients showed more than 10 red blood cells by high power field examination. The mean lactic dehydrogenase level was 1,239 I.U/L(normal range 218-472 I.U/L), while the mean aspartate aminotransferase and mean alanine aminotransferase were 51 I.U/L(normal range 13-36 I.U/L) and 44 I.U/L(normal range 5-33 I.U/L). Abdominal ultrasonography showed positive findings in 5 of 16(31%), of which 3 were confirmed by Doppler ultrasonography. In 18, computed tomography was done and all those showed positive findings of renal infarction(100%). In conclusion, it is important that identify the elevated lactic dehdrogenase level in case of any suspicion about renal infarction and confirm by computed tomography.

화백나무의 통나무直徑과 邊材率과의 關係에 關한 硏究

金是璟,黃震聲 진주산업대학교 1969 論文集 Vol.3 No.-

本校樹木園産의 화백나무에 關한 통나무直徑과 心材部直徑 및 邊材率과의 關係를 調査硏究한 結果를 要約하면 다음과같다. 1. 화백나무의 통나무直徑에서 心材部直徑을 求하는 實驗式 d=0.75698 D-0.12244를 決定하고 이 兩直徑間의 相關係數 r=+0.9901±0.0027이 計算되었으므로 高度의 有意性이 認定되었다. 2. 화백나무의 통나무直徑과 心材部直徑과의 關係는 大略直線的인 事實이라는 것을 알 수 있었다. 3. 화백나무의 통나무 直徑이 增大함에 따라 心材部直徑도 增大하며, 邊材部의 두께 亦是 점차 增大하다가 통나무直徑이 一定한 크기 以上으로 되면, 그 두께가 아주 微微하나마 減少되는 傾向이 있으며, 아울러 邊材率은 直徑이 增大할수록 減少되는 事實을 알 수 있었다. The results obtained from the investigation of the relations among the log-diameter, the heart wood-diameter, and the sap wood rate of Sawara-Cypress planted on the arboretum of our college are as follows: 1) Remarkable the significance of difference is admitted because the empirical formula d=0.75698 D-0.12244 which is used in finding the heart wood-diameter in the log-diameter of Sawara-Cypress is decided and correlation coefficient r=0.9901±0.0027 between the two diameters is calculated. 2) The relation between the log-diameter and the heart wood-diameter of Sawara-Cypress is understood as the almost straight line. 3) According as the log-diameter of Sawara-Cypress is enlarged the heart wood-diameter is enlarged and also the thickness of the sap wood is gradually enlarged, but according as the log-diameter reaches to a certain scope the thickness of the sap wood shows tendency to decrease slightly and the sap wood rate is decreased according as the log-diameter is enlarged.

유럽 通貨 統合(EMU)이 韓國 經濟에 미치는 영향과 그 대응 방안

김시경 한국EU학회 1998 EU학연구 Vol.3 No.1

The fall of the Soviet Union in 1990 and the sudden transformation of East European nations towards capitalism proves an absolute supremacy of United States In the international economic and political scene. This was represented by strong dollars. With the introduction of Euro, these situation are changing. The emergence of Euro as a serious competitor to dollar means the changing balance of international economic power which will contribute to the establishment of the new world economic order. EMU will not only be a good opportunity, but also implies a risk to Korean economy suffering from foreign exchange shortage and loss of competitiveness. To overcome the current economic difficulties and benefit from the new international currency, Euro, Korea needs to accelerate restructuring and promote the low-cost, high-efficiency and technology intensive industry.

韓·EC諸國間의 무역마찰과 韓國의 대응전략

金詩慶 단국대학교 경영대학원 1988 經院論叢(壇國大學校) Vol.8 No.-

生長錐에 의한 편백나무 直徑生長의 豫測에 關한 硏究

金是璟,權泳徹 진주산업대학교 1977 論文集 Vol.15 No.-

This study is carried out to investigate the prediction of the growth of diameter by the increment borer in hinoki cypress with an accurate formula. The data of this study are the data of 40 from the core in position of breast height of 20 pieces of hinoky cypress using the increment borer. The results are summarized as follows. 1. Let Y be the growth of semi-diameter for 5 years of the past from a certain moment, X be the growth of semi-diameter for 5 years before Y, and Z be the growth of semi-diameter for 5 years of the future from the moment, then we can obtain the following formula by the method of least squares using the data of 40 above mentioned, Z ㎝=0.1534+0.6754 Y ㎝…………(1) 2. As there is no rationality for current annual increment of trees between the formula(1) regarding as Y=O is Z=0.1534, therefore we can obtain the next formula using the method of least squares by formula of logarithm. log Z=0.0547+0.8816 log Y…………(2) 3. The prediction of the growth of diameter for comming 5 years (Z) regarding as equivalent to the growth of past 5 years (Y) is not correct. Using the data we can obtain the next formula, Y ㎝=0.0023+0.8041 X ㎝…………(3) and, as there is no significant difference between the formula (1) and (3), we can substitute (3) in place of (1). 4. We can easily obtain the formula (3) by measuring X and Y in the stand under investigation, and we can predict Z by Y of the formula (1) substituting Y by X of the formula (3) with no bias, accordingly it is good example to apply to the formula (2) with Y of the formula (3).