BIFUZZY IDEALS OF PSEUDO MV-ALGEBRAS

Cho, Yong-Uk,Jun, Young-Bae,Song, Seok-Zun 한국전산응용수학회 2006 Journal of applied mathematics & informatics Vol.22 No.1

After the introduction of fuzzy sets by Zadeh [8], there have been a number of generalizations of fundamental concept. The notion of intuitionistic fuzzy sets introduced by Atanassov is one among them. An intuitionistic fuzzy set is also called a bifuzzy set according to [5]. In this paper, we apply the concept of a bifuzzy set to (implicative) ideals in pseudo MV-algebras. The notion of a bifuzzy (implicative) ideal of a pseudo MV-algebra is introduced, and some related properties are investigated. Conditions for a bifuzzy set to be a bifuzzy ideal are given, and characterizations of a bifuzzy (implicative) ideal are provided. Using a family of ideals, bifuzzy ideals are established.

Bifuzzy ideals of pseudo MV-algebras

Yong Uk Cho,Young Bae Jun,Seok Zun Song 한국전산응용수학회 2006 Journal of applied mathematics & informatics Vol.22 No.1-2

After the introduction of fuzzy sets by Zadeh [8], there have been a number of generalizations of fundamental concept. The notion of intuitionistic fuzzy sets introduced by Atanassov is one among them. An intuitionistic fuzzy set is also called a bifuzzy set according to [5]. In this paper, we apply the concept of a bifuzzy set to (implicative) ideals in pseudo MV-algebras. The notion of a bifuzzy (implicative) ideal of a pseudo MV-algebra is introduced, and some related properties are investigated. Conditions for a bifuzzy set to be a bifuzzy ideal are given, and characterizations of a bifuzzy (implicative) ideal are provided. Using a family of ideals, bifuzzy ideals are established.

Naphthazarin Derivatives (Ⅶ): Antitumor Action against ICR Mice Bearing Ascitic S-780 Cells

Song, Gyu-Yong,Kim, Yong,You, Young-Jae,Cho, Hoon,Ahn, Byung-Zun The Pharmaceutical Society of Korea 2001 Archives of Pharmacal Research Vol.24 No.3

Various analogues of 5,8-dimethoxy-1,4-naphthoquinone (DMNQ) such as 2- or 6-(1-hydroxyiminoalkyl)-DMNQs were prepared and evaluated for the antitumor action. (1 -Hydroxyiminoalkyl)-DMNQs derivatives expressed greater antitumor action than (1-hydroxyalkyl) - or acyl-DMNQ derivatives. Moreover, 6-(1-hydroxyiminoalkyl)-DMNQ derivatives expressed higher antitumor action than 2-substituted ones, suggestive of a steric effect. Some of 6-(1-propyloxyalkyl)-DMNQ derivatives with an alkyl group of butyl to octyl moiety showed T/C values of >400%

공기-탄산용융염 이상흐름계에서의 흐름영역전이

조용준 ( Yung Zun Cho ),양희철 ( Hee Chul Yang ),은희철 ( Hee Chul Eun ),강용 ( Yong Kang ) 한국화학공학회 2009 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.47 No.4

Stabilization/Solidification of Radioactive LiCl-KCl Waste Salt by Using SiO2-Al2O3-P2O5 (SAP) inorganic composite 1 : Dechlorination Behavior of LiCl-KCl and Characteristics of Consolidation

In Hak Cho,Hwan Seo Park,Soo Na Ahn,In Tae Kim,Yong Zun Cho 한국방사성폐기물학회 2012 방사성폐기물학회지 Vol.10 No.1

사용후 핵연료내 우라늄 및 초우란원소를 회수하는 파이로프로세싱 공정에서 배출되는 금속염화물계 방사성 폐기물은 높은 휘발특성과 붕규산계 유리와의 낮은 상용성으로 인해 고화처리가 쉽지 않은 폐기 물이다. 이를 위해, 본 연구에서는 고화처리의 한 방법으로 탈염화 반응을 통한 고화체제조 개념을 채택 하였다. 솔젤법을 이용하여 탈염화물질, SiO2-Al2O3-P2O5 (SAP)을 합성하였으며 이를 이용하여 탈염화 반 응거동 반응생성물의 고형화 특성을 조사하였다. LiCl계 폐기물과 달리, LiCl-KCl폐기물의 반응은 두 개 의 온도범위에서 반응이 진행되며, 400℃의 경우에는 LiCl이, 약 700℃에서는 KCl이 주로 반응하는 것으 로 확인되었다. 여러 가지 반응실험을 통하여 LiCl-KCl의 탈염화 반응에 가장 적합한 물질은 SAP 1071 (Si/Al/P=1/0.75/1 in molar)인 것으로 확인되었다. 4가지 종류의 고형화 실험을 통하여 고화체의 bulk shape과 densification은 SAP/Salt의 비에 영향 받는 것을 확인하였다. 제조된 고형화 시료는 Product Consistency Test-A법을 이용하여 기본적인 내구성을 평가하였다. 본 연구는 SiO2, Al2O3, P2O5 로 이루 어진 탈염화 물질을 이용하여 반응특성과 고형화 특성에 대한 기본적인 정보를 제공하였으며, 이와 같은 실험을 통하여, 본 연구에서 제안된 탈염화 고화처리방법이 휘발특성이 높고 기존 유리매질과 상용성이 낮은 금속염화물계 폐기물에 적용이 가능함을 확인하였다.

Serial Changes of MR Images Throughout the Stages of Infection of Spondylodiscitis

Kwon, Tae-Hyung,Shin, Zun-Zae,Kuh, Sung-Uk,Yoon, Young-Sul,Cho, Yong-Eun,Kim, Young-Soo The Korean Neurosurgical Society 2006 Journal of Korean neurosurgical society Vol.40 No.5

Objective : Spondylodiscitis has been diagnosed by clinical, radiological and laboratory methods. MR imaging is well known as an excellent diagnostic tool for spondylodiscitis. However, the changes in MR images throughout the treatment process has not been studied. Thus we have analyzed the serial changes of MR images throughout the stages of infection. Methods : Ten patients were selected for retrospective reviewed who had been treated at our institute for infectious spondylodiscitis between 2000 and 2005. These patients had been followed-up at least six months and had taken more than a couple of series of MR scans. We classified the MR images into four groups according to the stages of treatment for the infection and compared them to the clinical and laboratory findings. Results : MR image signals changed minimally or appeared to be normal in the early stages. The progression of spondylodiscitis was characterized by a low T1 WI signal and a high T2 WI signal in disc and vertebral body. The signal changes of the MR images were then propagated and the end plate was destructed. During the treatment, the destructed endplate became stabilized and the signal intensity of both T1 and T2 WI were fixed to low-or iso-intensity. Conclusion : We can determine the serial signal changes based on MR images according to the treatment of spondylodiscitis. We can therefore determine the status of the infection and the stage of treatment, as well as the diagnosis of spondylodiscitis using serial MR images.

The Effectiveness of Osteoplasty System (Vertebroplasty using Large Cannula-low Pressure Delivery System) in Compression Fracture and other Spinal Pathology

Kang, Jeong-Han,Kuh, Sung-Uk,Shin, Zun-Zae,Cho, Yong-Eun,Yoon, Young-Sul,Chin, Dong-Kyu The Korean Neurosurgical Society 2005 Journal of Korean neurosurgical society Vol.38 No.4

Objective : The vertebroplasty is an excellent procedure in spine compression fracture, but there are some problems such as cement leakage and difficulties in bone biopsy. Recently, the osteoplasty system is developed to solve these problems, so we will report the usefulness of the osteoplasty system. Methods : From January 2003 to November 2003, there are 9patients with simple osteoporotic spine compression fracture, 2 compression fracture patients combined with suspicious spinal metastasis, 1patient with suspicious primary bone tumor, and 2patient with infection on spine. All patients were treated using the osteoplasty system. Results : All 11 compression fracture patients were relived the back pain after the osteoplasty and there is no complication. The bone biopsies in 3 suspicious cancer patients were also effectively performed using the osteoplasty system; negative result in 2patients and positive result in 1patient. The culture result of spontaneous discitis was no growth for 48hours. The spine tuberculosis was confirm using the osteoplasty system. Conclusion : The osteoplasty system has distinguished advantages in comparison with the vertebroplasty. That is, the risk of cement leakage is lower than vertebroplasty because of low pressure delivery system. And we can obtain the specimen effectively in bone biopsy because of large cannula. In conclusion, we emphasize that the osteoplasty system is a more useful procedure in spine compression fracture especially in the patient needed bone biopsy for diagnosis.

할로아세틸시코닌 유도체의 합성 및 항암성 평가 : Synthesis and Evaluation of Antitumor Activity

鄭相國,金光洙,송규용,조훈,안병준 충남대학교 약학대학 의약품개발연구소 1998 藥學論文集 Vol.14 No.-

The secondary hydroxy group at side chain of shikonin structure was selectively acylated with various haloacetic acids in presence of dicyclohexylcarbodiimide and 4-dimethylaminopyridine to produce haloacetylshikonin derivatives. The cytotoxicity of monohaloacetylshikonin derivatives against L1210 cells increased in the following order: monochloroacetylshikonin (ED_50, 0.142 ㎍/㎖) nonobromoacetylshikonin (ED_50, 0.158㎍/㎖)>monoiodoacetylshikonin (ED_50, 0.173 ㎍/㎖). Introduction of larger halogen atoms decreased the cytotoxic activity, presumably due to steric hinderance. The cytotoxicity of chloroacetylshikonin derivatives was dependent on the number of chlorine atom, thus increasing in the following order : trichloroacetylshikonin (0.032 ㎍/㎖)>dichloroacetylshikonin (0.059 ㎍/㎖)> monochloroacetylshikonin (ED_50, 0.142 ㎍/㎖). Thus, the electron-withdrawing effect seems to be important for the cytotoxicity of chloracetylshikonin derivatives. Consistent with the above, dichloracetylshikonin (T/C, 182%) and trifluoroacetylshikonin (195%) showed higher T/C values than monochloroacetyl-(T/C, 122%), monobromoacetyl-(T/C, 154%) and monoiodoacetylshikonin (T/C, 117%) derivatives. Haloacetylshikonin derivatives showing lower cytotoxic activities against L1210 cells exhibited lower T/C values. It seems that there is a relationship between the cytotoxicity of haloacetylshikonin and their antitumor activity.

SiO₂-Al₂O₃-P₂O₅ 무기복합체를 이용한 LiCl-KCl 방사성 폐기물의 안정화/고형화: Part 1. LiCl-KCl의 탈염화 반응거동 및 고형화특성

조인학,박환서,안수나,김인태,조용준,Cho, In-Hak,Park, Hwan-Seo,Ahn, Soo-Na,Kim, In-Tae,Cho, Yong-Zun 한국방사성폐기물학회 2012 방사성폐기물학회지 Vol.10 No.1

The metal chloride wastes from a pyrochemical process to recover uranium and transuranic elements has been considered as a problematic waste difficult to apply to a conventional solidification method due to the high volatility and low compatibility with silicate glass. In this study, a dechlorination approach to treat LiCl-KCl waste for final disposal was adapted. In this study, a $SiO_2-Al_2O_3-P_2O_5$ (SAP) inorganic composite as a dechlorination agent was prepared by a conventional sol-gel process. By using a series of SAPs, the dechlorination behavior and consolidation of reaction products were investigated. Different from LiCl waste, the dechlorination reaction occurred mainly at two temperature ranges. The thermogravimetric test indicated that the first reaction range was about $400^{\circ}C$ for LiCl and the second was about $700^{\circ}C$ for KCl. The SAP 1071 (Si/Al/P=1/0.75/1 in molar) was found to be the most favorable SAP as a dechlorination agent under given conditions. The consolidation test revealed that the bulk shape and the densification of consolidated forms depended on the SAP/Salt ratios. The leaching test by PCT-A method was performed to evaluate the durability of consolidated forms. This study provided the basic information on the dechlorination approach. Based on the experimental results, the dechlorination method using a $SiO_2-Al_2O_3-P_2O_5$ (SAP) could be considered as one of alternatives for the immobilization of waste salt. 사용후 핵연료내 우라늄 및 초우란원소를 회수하는 파이로프로세싱 공정에서 배출되는 금속염화물계 방사성 폐기물은 높은 휘발특성과 붕규산계 유리와의 낮은 상용성으로 인해 고화처리가 쉽지 않은 폐기물이다. 이를 위해, 본 연구에서는 고화처리의 한 방법으로 탈염화 반응을 통한 고화체제조 개념을 채택하였다. 솔젤법을 이용하여 탈염화물질, $SiO_2-Al_2O_3-P_2O_5$ (SAP)을 합성하였으며 이를 이용하여 탈염화 반응거동 반응생성물의 고형화 특성을 조사하였다. LiCl계 폐기물과 달리, LiCl-KCl폐기물의 반응은 두 개의 온도범위에서 반응이 진행되며, $400^{\circ}C$의 경우에는 LiCl이, 약 $700^{\circ}C$에서는 KCl이 주로 반응하는 것으로 확인되었다. 여러 가지 반응실험을 통하여 LiCl-KCl의 탈염화 반응에 가장 적합한 물질은 SAP 1071 (Si/Al/P=1/0.75/1 in molar)인 것으로 확인되었다. 4가지 종류의 고형화 실험을 통하여 고화체의 bulk shape과 densification은 SAP/Salt의 비에 영향 받는 것을 확인하였다. 제조된 고형화 시료는 Product Consistency Test-A법을 이용하여 기본적인 내구성을 평가하였다. 본 연구는 $SiO_2$, $Al_2O_3$, $P_2O_5$로 이루어진 탈염화 물질을 이용하여 반응특성과 고형화 특성에 대한 기본적인 정보를 제공하였으며, 이와 같은 실험을 통하여, 본 연구에서 제안된 탈염화 고화처리방법이 휘발특성이 높고 기존 유리매질과 상용성이 낮은 금속염화물계 폐기물에 적용이 가능함을 확인하였다.

니켈(II)-거대고리 착물로 변성된 유리질 탄소 전극을 이용한 L-Dopa의 전기화학적 정량

이선용,조형화,김호식,배준웅,Yi, Seon-Yong,Cho, Hyung-Hwa,Kim, Ho-Sik,Bae, Zun-Ung 대한화학회 2005 대한화학회지 Vol.49 No.1