제올라이트 A 내의 은의 화학 및 결정학적 연구 (Ⅱ)

김양,한영욱,허남호 부산대학교 1988 자연과학논문집 Vol.45 No.-

Metal clusters, (invloving metal-metal bond) can be prepared intrazeolitically and studied crystallographically. Metal clusters are an important current topic in chemistry partly because of their catalytic properties. In this work, structure of partly Ag^(+) exchanged zeolite A, Ag_(x)Na_(12-x) (x=4.6) treated with H_(2) at 350℃ was determined crystallographically. Ag_(6)^(3+) was found in the large cavity. This cluster may be viewed as nearly linear trisilver molecule (Ag_(3))^(0) (Ag-Ag bond length=2.92 and 2.94 Å) stabilized by the coordination of each atom to an Ag^(+) ion at 3.30 to 3.40 Å. Ag_(8.65)Cs_(3.35)-A, Ag_(9)Cs_(3)-A and Ag_(10)Cs_(2)-A were prepared with ion exchange by a flow method using mixed solution of AgNO_(3) and CsNO_(3) whose mole ratios were 1: 5, 1 : 3, and 1 : 1, respectively. These crystal structures were determined and it was found that Cs^(+) ions occupy preferably at the center of 8-ring position. In the crystal structures of Ag_(9)Cs_(3)-A treated with _(2) at 23 and 310℃ and that of Ag_(4.6)Cs_(6.4)H-A treated with H_(2) at 350℃, H_(2) can not enter to react the Ag^(+) ions because Cs^(+) ions block 8-ring so well. However in the structure of Ag_(9)Cs_(3)-A treated with H_(2) at 470℃, H_(2) can diffuse into the zeolite and reduce 3.5 out of 8.5 Ag^(+) ions. Unfortunately the reduced Ag^(0) atoms migrate out of zeolite framework because of their high thermal vibrations. Na^(+) ions prefer to occupy at the sites of 8-oxygen rings and Ag^(+) ions at the sites of 6-oxygen rings in the structure of dehydrated Ag_(7.6)Na_(4.4)-A.

중국에서의 한국 의병ㆍ독립운동가들에 대한 선양

김양 의암학회 2006 의암학연구 Vol.3 No.-

방향족 탄화수소의 발암성에 관한 분자궤도론적 연구

김양,황인철,김은식 부산대학교 1983 자연과학논문집 Vol.35 No.-

The carcinogenicity of PAH (Polycyclic Aromatic Hydrocarbon) was studied with the molecular orbital method in this paper. The theoretical calculations of molecular orbitals are based on the simple Huckel method. The model of carcinogenicity of PAH was followed by the "bay region" model. This model shows that K region binds with enzymes, and that epoxidations occur A and B region. As reactivity indices, frontier electron density, superdelocalizability and approximate superdelocalizability are calculated. Thirty-nine compounds were tested in this paper. The results are as follows: 1. The frontier electron density and approximate superdelocalizability do not show good correlations with carcinogenicity of PAH in this paper. 2. A to B ratios of the approximate superdelocalizability were located between values of 0.9960 and 1.0070 in carcinogenic compounds. (K+A+B) values of carcinogenic compounds were generally larger than 5.7. 3. Theoretically, it is not easy to estimate the strength of carcinogenicity. However, the superdelocalizability of (K+A+B) region gives a good correlation with the carcinogenicity of PAH studied. Therefore, K, A, and B regions of those compounds are all related to the carcinogenicity.

금속 착물에서 스핀교차

김양 고신대학교 자연과학연구소 2010 고신대학교 자연과학연구소 논문집 Vol.18 No.-

색깔 변화를 수반하는 스핀교차 물질은 디스플레이 장치 개발에 특히 적당하다 광유발 변화 현상은 홀로그래피 장치에 응용할 수 있다. 스핀 교차와 결합시킨 가역적 열변색 현상은 온도문턱을 나타내는 표지(예를 들면, 식품 안전) 로 사용할 수 있다. 적용시킨 압력 하에서 스핀교차 물질의 색깔 변화는 압력의 원격 센서 작용이 색깔 변화의 관찰에 의하여 도달될 수 있는 응용을 위한 압력 센서로 이용할 수 있다. 금속 원자와 관련된 성질(자성, 광학, 전도도, 색깔)과 액정의 성질을 결합시킨 물질(금속메조젠)은 실질적인 응용에 많은 이점을 이끌 수 있다. 예를 들면, 스핀교차 물질을 이용한 앓은 막의 제작, 서로 다른 온도 체제에서 스위치 빚 센서 작용, 혹은 액정을 포함하는 금속에서 광변색 현상과 열변색 현상 등이다. Pin crossover materials accompanying color change are particularly suitable for the development of display devices. The light-induced switching phenomena can be applied in holographic devices. The irreversible thermochroism, which in associated with the spin-crossover, can be employed as tag to indicate a temperature threshold e.g. in food safety. Color change of spin crossover materials under applied pressure may be exploited in pressure sensors for applications where remote sensing of pressure could be achieved by observation of a colour changes. The materials combining properties of liquid crystals with properties associated with metal atoms (magnetism, optics, conductivity, colour, metallomesogens, may lead to a number of advantages in practical applications, for example, the production of thin films with spin crossover materials, switching and sensing in different temperature regimes, or achievement of photo- and thermochroism in metal-containing-liquid crystals.

중국 요동 오도구와 팔왕동 재조명

김양 의암학회 2008 의암학연구 Vol.6 No.-

윤희순의사의 중국 환인현 무순지역 항일독립운동 근거지 재조명

김양 의암학회 2008 의암학연구 Vol.6 No.-

금강용수 혼화공정 개선연구

김양,안창진,전항배,Kim, Yang,An, Chang-Jin,Jeon, Hang-Bae 한국상하수도협회 1995 水道 Vol.22 No.4

정수처리기술 현황 및 전망

김양,Kim, Yang 한국상하수도협회 1993 水道 Vol.63 No.-

조기이민사

김양 의암학회 2007 의암학연구 Vol.4 No.-

Vero E6 조직배양세포에서의 한탄바이러스 증식

김양 고려대학교 의과대학 1987 고려대 의대 잡지 Vol.24 No.1

Korean hemorrhagic fever (KHF) was recognized in Korea for the first time in 1951 during Korean War among United Nations troops although similar diseases to KHF had been reported as Hemorrhagic nephroso-nephritis in Russia, as Epidemic hemorrhagic fever in China, as Nephropathia epidemica in Scandinavia and as Epidemic hemorrhagic fever in Eastern Europe and in Japan. The etiologic agent of Korean hemorrhagic fever was first discovered from lung tissue of Apodemus agrarius by Lee and Lee in 1976 and they had isolated the same agent from KHF patient's sera and had succeeded the propagation of the virus in Apodemus agrarius and the virus was named Hantaan virus after Hantaan river. The etiological relationship had been shown by serologic means among above mentioned similar diseases, and the working group on Hemorrhagic fever with renal syndrome at a WHO meeting in 1982 recommended the above mentioned diseases with different names should be referred to as "Hemorrhagic fever with renal syndrome (HFRS)." In 1981, Hantaan virus was successfully propagated in an in vitro system in A549 cells originated from alveolar epithelial cells of human lung cancer, and later in Vero E6 cells originated from African green monkey renal epithelial cells. With the aid of this in vitro growth, the study of virus isolation and morphological and physico-chemical Properties of the virus became easier. This report describes the growth curve of Vero E6 cells and the growth curve of Hantaan virus in Vero E6 cells. The data obtained from tissue culture flasks made in Korea was compared with the data obtained from tissue culture flasks made in U.S.A. The results are summarized as follows. 1. There were no differences in durability and in stability of pH of culture media in tissue culture flasks between U.S. Costar flask and Korean GCMEC flask. The pH of culture media was maintained between 7.1 and 7.6 for 14 days at 5 % CO₂ incubator. 2. Vero E6 cells were propagated well both in Costar and GCMEC tissue culture flasks, and the propagation reached peak level on 3rd day after inoculation. 3. Hantaan virus were propagated well in Vero E6 cells and the maximum yield of virus were on 8th day after inoculation of virus. The maximum infectious unit of virus in tissue culture flask containing media with 5% fetal calf serum was 10^(7-8)/ml, and that in flask containing 5% of 0.4% bovine albumin was 10^(6-7)/ml. There was no difference between the value obtained in Costar and GCMEC flask. 4. 50% of the Vero E6 cells were infected on 3rd day after inoculation of Hantaan virus, and 95% on 5th day.