金鑛石中의 金分析

양재현,차기원,Yang Jae Hyun,Cha Kee Won 대한화학회 1967 대한화학회지 Vol.11 No.1

A method of determination of gold in ores has been established: Disolved ore solution is evaporated to dryness, redissolved with 0.1N HCl then chloroaurate formed is adsorbed on anion exchange resin, Dowex $1\;{\cdot}\;{\times}4$. The resin is ignited and the residue is dissolved with HCl-$HNO_3$. After evaporation of the acid, and then dilution with water, sodium azide is added. The gold is extracted with amyl alcohol from the solution buffered to pH 6. The gold is determined by measuring absorbancy of the alcohol layer spectrophotometricaly at $385m{\mu}$. Various factors, HCl concentration, amount of the resin rate, if adsorption, foreign ions, effecting to the method, have been examined. This method seems to be satisfactory for the determination of gold presented dawn to 1g per metric ton in ore.

제주지역(濟州地域) 도축우(屠畜牛)의 주육포자충(住肉胞子蟲) 감염실태조사(感染實態調査)

양재현,강영배,위성환,이승택,김공식,Yang, Jae-hyun,Kang, Young-bai,Wee, Sung-hwan,Lee, Seung-taek,Kim, Kong-sik 대한수의학회 1990 大韓獸醫學會誌 Vol.30 No.4

A preliminary survey of Sarcocystis species in the slaughtered cattle in Cheju was undertaken during May through October 1989, using digested diagnostic technique for the heart, the esophagus and the dorsal muscles of the neck specimens digested in 0.5% trypsin solution. The results obtained were summarized as follows. 1. The overall infection rate of Sarcocystis in a total of 218 slaughtered cattle was as high as 36.7% with the highest frequencies in the esophagus muscles(21. 6%), followed by in the dorsal muscles of the neck(19.1%) and in the heart rnuscles(17.9%). 2. Age difference was noticed as 64.3% in the cattle older than five years in comparison with 41.7%, 34.4%, in the group of two to four years and in the group of younger than two years respectively. 3. It was also noticed that the prevalence in the Brahman cross breed was higher(40.0%) than in any other breeds. 4. Regional distribution of Sarcocystis infections was observed as 75.0% in south-east area, 50.0% 44.7%, 35.0%, 32.0% and 20.6% in the areas of Seogwipo city, north-west, south-west, Cheju city and northeast area respectively. 5. According to the type of rearing the infection rate in the ranch type farm was noticed with and in the stock farms(36.2%).

더덕 유전자원의 사포닌 함량 차이

양재현(Jae-Hyun Yang),정한진(Han-Jin Jeong),정건(Gun Jeong),박시형(Si-Hyung Park),김관수(Kwan-Su Kim) 한국약용작물학회 2015 한국약용작물학회 학술대회논문집 Vol.2015 No.1

下顎片側骨折患者의 咬筋活性度에 對한 筋電圖學的 硏究

梁在鉉(Jae Hyun Yang),金周煥(Ju Whan Kim),黃聖明(Sung Myung Hwang) 대한치과의사협회 1974 대한치과의사협회지 Vol.12 No.2

Ni-Monoethanolamine 착염의 폴라로그라피-

손병영,양재현,Son, Byung-Yung,Yang, Jae-Hyun 대한화학회 1965 대한화학회지 Vol.9 No.3

Ni(II)-Monoethanolamine(MEA)錯鹽의 水銀電極表面에 있어서의 還元反應의 反應機構를 폴라로그라프법을 써서 解明하였다. 이 錯鹽의 電極環元의 可逆程度를 直流 및 交流 폴라로그람으로 檢討하였더니 pH가 9.0보다 낮은 範圍에서는 錯鹽의 反應電流로 推測되는 非可逆性波를 나타니고 pH $9.5{\sim}11.0$ 사이에서는 Cd(II)波에 相當하는 比較的 可逆的인 well defined wave를 얻었다. MEA의 濃度와 pH를 變함으로서 얻은 波를 檢討한 結果 還元波는 이를 ligands와 빠른 平衡에 있는 Ni錯鹽에 基因하고 이 錯鹽의 化學式은 $Ni(MEA)_3OH$이고 總安定度常數는 約 $10^{20}$임을 밝혀내었다. Polarographic studies of Ni(II) ion complexed with monoethanolamine, MEA, in aqueous solution have been carried out using sodium perchlorate as a supporting electrolyte. With use of D. C. and A. C. polarograms polarographic behaviors of the complex have been discussed. The wave obtained from basic solutions are found to be well defined and reversible, while reduction of the complex at pH smaller than 8.8 seems to be kinetic controlled with different complex species. Reducing species of the complex on the mercury electrode is determined to be $Ni(MEA)_3OH$ instead of $Ni(MEA)_2(OH)_2$ which is reported by other workers. Overall stability constant of $Ni(MEA)_3OH$ is obtained to be $10^{20}.$

불꽃 분광광도법에 의한 지르코늄 화합물 중의 나트륨 정량

최규원,양재현,이광우,Choe, Gyu-Won,Yang, Jae-Hyun,Lee, Kwang-Woo 대한화학회 1968 대한화학회지 Vol.12 No.2

Rapid flame spectrophotometric method is developed to determine a small amount of sodium in zircon frit and high purity zirconium compounds. The instrumental characteristics and the optimum conditions are studied and a comparison between calibration curve method and standard addition method is made.

자가 슬개건과 동종 슬개건을 이용한 전방 십자 인대 재건술의 비교

전철홍,김영진,양재현,Chun, Churl-Hong,Kim, Young-Jin,Yang, Jae-Hyun 대한관절경학회 2000 대한관절경학회지 Vol.4 No.1

목적 : 자가 골-슬개건-골 이식건과 동종 골-슬개건-골 이식건을 이용한 전방 십자 인대 재건의 효능을 주관적 및 객관적 기준을 이용하여 비교 조사하고자 하였다. 대상 및 방법 : 1993년 3월부터 1996년 6월까지 18례의 자가 골-슬개건-골 이식건과 24례의 동종 골-슬개건-골 이식건을 이용하여 한 명의 술자가 전방 십자 인대 재건술을 시행하고, 술 후 2년 이상 추시 되어진 두 그룹에서 증상, 이학적 검사 및 Telos stress arthrometer를 이용하여 비교하였다. 결과 : Modified Feagin Scoring System을 이용한 2년 이상 추시 만족도는 자가 건 이식 그룹과 동종건 이식 그룹이 각각 $88.9\%$와 $87.5\%$를 보였으며, Tegner activity score, 추시상 장력 검사, 관절 운동 범위, 대퇴 사두근부의 둘레 비교 등에는 큰 차이가 없었으나, 슬개-대퇴부 동통, 탄발음 및 이완 등의 슬개 대퇴부의 문제는 동종건 이식 그룹$(8.3\%)$보다 자가 건 이식 그룹$(33.3\%)$에서 더 많이 발생되어 통계학적으로 의미있는 차이를 보였다(p<0.05). 결론 : 동종 골-슬개건-골 이식건을 이용시에 슬개-대퇴부 동통 및 탄발음 등이 현저하게 적은 빈도를 보였으므로, 자가 이식건의 대용으로 사용이 가능할 것으로 사료된다. Purpose : The purpose of this study was to compare the efficacy of bone-patellar tendon-bone(B-PTB) allograft with autograft B-PTB reconstruction of anterior cruciate ligament(ACL) according to the subjective and objective criteria. Materials and Methods : 42 patients were treated for acute rupture or chronic insufficiency of the ACL between March 1993 and June 1996. There were 18 autografts and 24 allografts for ACL reconstruction. At 2 years of follow-up after operation, autograft and allograft groups were compared based on subjective, objective criteria and Telos stress arthrometer. Results : The modified Feagin Scoring System revealed 16 patients$(88.9\%)$ with a satisfactory result by autografts, but 21 patients$(87.5\%)$ with a satisfactory result by allografts after 2-years follow-lip. There was no statistically significant difference between the two groups. ACL reconstruction with B-PTB allograft did not produce a significant functional deficit. But patellofemoral pain and crepitus were more frequent in the autografts$(33.3\%)$ than allografts$(8.3\%)$ (p<0.05). Conclusion : The ACL deficient knees treated with allografts for ACL reconstruction tended to be better than those reconstructed with autografts fur the reduction of patellofemoral crepitus and pain. B-PTB allograft provides an acceptable alternative to autograft tissue for reconstruction of the ACL.

[단신] 뇨중 이소프레날린(Isoprenaline)의 분석방법에 관한 연구

박종세(Jong-Sei Park),양재현(Jae-Hyun Yang),노동석(Dong-Seok Lho),이정애(Jeong-Ai Lee) 한국분석과학회 1989 분석과학 Vol.2 No.1

증례 : 소화기 ; 담도암과 감별이 어려웠던 국소형 자가면역성 췌장염

장영주 ( Young Joo Jang ),양기영 ( Ki Young Yang ),김상범 ( Sang Bum Kim ),박선후 ( Sun Hoo Park ),안영 ( Young Ahn ),양재현 ( Jae Hyun Yang ),이종환 ( Jong Hwan Lee ) 대한내과학회 2011 대한내과학회지 Vol.80 No.2S

자가면역 췌장염은 전형적으로 췌장의 미만성 종대, 전반적인 주췌관의 협착 등의 소견을 보이며 담관의 협착 등의 소견을 보이지만 최근 들어 다양한 양상의 비전형적인 자가면역 췌장염의 보고가 늘고 있다. 자가면역 췌장염의 원위부 총담관의 침범은 흔히 관찰되며 가끔 담관암으로 오인되기도 하며 수술 후 진단되기도 한다. 저자들은 자가면역 췌장염의 국소적인 담관침범으로 담도암과의 감별이 어려웠던 증례를 경험하여 문헌고찰과 함께 보고한다. Autoimmune pancreatitis (AIP) is a rare pancreatic disorder of autoimmune etiology. It has characteristic clinical features, such as pancreatic parenchymal swelling and irregular narrowing of the main pancreatic duct due to plasma cell infiltration. It occurs mostly in Far East Asia. Although it generally involves whole pancreatic parenchyma, some cases demonstrate focal involvement of the pancreas or adjacent organs, which are often mistaken for cancer. We report a case of AIP that was confused with cholangiocarcinoma of the distal common bile duct (CBD). The patient experienced sudden development of jaundice with vague abdominal discomfort. Abdominal computed tomography revealed a well-enhanced lesion, and positron emission tomography showed high standard uptake value at the distal CBD, indicating malignant disease. However, pathological examination by surgical excision indicated focal-type AIP. This is believed to be the first case of focal-type AIP mimicking cholangiocarcinoma. (Korean J Med 2011;80:S121-S125)

TSN 206 SA형 질량분석기의 고유특성에 관한 연구

梁在炫,嚴泰允 단국대학교 1984 論文集 Vol.18 No.-

Some characteristics of Model TSN 206 SA Mass Spectrometer, especially, on the variation of ion population as a function of time at the ion source, response time of the magnetic field and stability of the field after step scanning at peaks have been investigated and the following results are obtained. 1) Magnetic field response is fast enough for a general experimental purpose so that waiting time longer than 50μsec. after step scanning at peaks gives sufficient accuracy. 2) Integration time is more important than waiting time and the former should be longer than 1sec. in order to have ordinary analytical accuracy. 3) Built-in clock system is designed such that it's increment is 0.2sec. For short integrating time experiment, it is very important that the integration should be set at duration of integar multiple of 0.2sec. 4) In order to obtain more accurate isotope ratio, data processing program must be modified considering the pattern of tatal ion population variation during a measurement in the ion source of the system.