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치환 Terpyridine 리간드를 가진 옥소루테늄 착물에 의한 알켄산화반응의 반응속도론적 연구
임종완,여환진 慶北大學校 師範大學 科學敎育硏究所 1998 科學敎育硏究誌 Vol.22 No.-
The 4'-substituted terpyridines(Xtpy; Phtpy, EtOtpy, Cltpy, Me_(2)Ntpy) were synthesized. Their spectral properties have been investigated by means of ^(1)H-NMR and mass spectrometer. Also, a series of new aqua- of oxo-ruthenium complexes containing the tridentate meridonal ligand Xtpy ligand substituted in the 4' positions with electron-donating and electron withdrawing groups of general formula [Ru(Y)(Xtpy)(bpy)]^(2+)(X = ph, EtO, Cl, Me_(2)N ; Y = H_(2)O, O) have been prepared and characterized. Their specral properties have been investigated by means of UV-Vis, ^(1)H-NMR and FT-IR spectrometer. The kinetics of styrene oxidation by [RuO(Xtpy)(bpy)]^(2+) complexes were studied spectrophotometrically by monitoring the increasing of the 400-500nm of oxo ruthenium complexes in acetonitrile. The results of the oxidation reaction clearly demonstrate that the rate of oxidation is dependent on the electronic properties of the oxoruthenium complexes. The oxidation reactions were studied at three different temperatures(15, 25, 35℃). The experimental data support the operation of an associative interchange mechanism in which cleavage of the Ru=O bond and formation of an O-styrene bond have equal importance.
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유한 요소 법을 이용한 노화에 따른 요추의 피질 골과 해면 골 간의 하중 분담 비율
임종완,Lim, JongWan 대한의용생체공학회 2016 의공학회지 Vol.37 No.2
본 연구는 유한 요소 법을 이용한 노화되어 강성/강도가 저하되는 요추 체의 얇은 피질과 해면 골의 하중 분담 비율 분석과 사용된 탄성계수들의 평가가 목적이다. 해면 골의 나은 해석을 위하여, 20년마다 압축 시험에서 얻은 탄성계수를 체적 공극 비율로 나눈 유효 탄성계수를 사용하였다. 이와 상응하는 피질 쉘도 공극 비율을 포함한 빔 이론의 수식들로부터 유효 탄성계수를 구한 후에 적용하였다. 또한 p-요소를 사용하여 수치 오차를 최소화하였다. 보고된 논문들을 참고하여 후관절 부분이 제거된 매개 변수적인 퇴행된 L3 척추 형상을 만들어 유한 요소 모델링 하였다. 일정 변위의 압축 조건을 가한 후에 여덟 조각의 부피 별로 각 뼈에서 탄성 변형률 에너지와 수직 하중의 비율을 사용하여 하중 분담 비율을 계산하였다. 결과로는 1) 20대에서 80대까지 해면 골의 하중 비율은 55%에서 49%로 감소하였다; 2) 피질 쉘은 중간 면에서 최고 비율을, 해면 골은 종판에서 최고 비율을 나타냈다; 3) 다공성 얇은 피질과 해면 골을 위한 유효 탄성계수의 사용은 적절하였다; 4) 두 방법을 이용하여 얻은 하중 분담 비율의 차이는, 전체 비율은 1% 미만 내에서 같지만 각 위치에서의 비율 값들은 약간 달랐다. This research was aimed to analyze load sharing ratios between cortical shell and trabecular bone of a degraded lumbar vertebra with aging, and also evaluate elastic moduli assigned into an FE model, using finite element method. For the better analysis of trabecular bone, effective elastic moduli, that is, nominal elastic moduli divided by the volumetric porosities was used. The elastic moduli of the cortical shell suitable for the trabecular bone were obtained from the equations on the basis of idealized stress-strain relations, including areal porosities. To minimize numerical errors, p-element was used. Using eight parameters that refer to some published papers, the geometry of L3 with a removed posterior part. After the constant compressive displacement was applied, the load sharing ratios were obtained by using both every elastic strain energy and every vertical force between two bones in each 8-volume. As results, 1) according to an increase in age from 20-year to 80-year, load sharing ratios of trabecular bone decreased from 55% to 49%; 2) the maximal ratios of each bone were occurred in the mid-plane of centrums and the endplate of cortical shells, respectively; 3) effective elastic moduli assigned into a porous centrum/cortex were found to be adequate; 4) for load sharing ratios, the difference of two methods showed that the total ratios were almost same within less than 1% but the partial ratios at every depth were more or less different each other.
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초음파로 측정한 한국 젊은 남성의 고환용적: 체질량지수와의 상관관계
임종완,박종윤,민승기 대한비뇨의학회 2009 Investigative and Clinical Urology Vol.50 No.6
Purpose: Testicular volume is one of the important indices that represent the reproductive ability of adult males. In previous studies, however, testicular volume was measured by manual palpation or orchidometer, resulting in inaccuracy or subjectivity. Accordingly, the need for accurate data on the size of the testes is increasing, and we conducted testicular volume measurements by using scrotal ultrasonography. We investigated the relationship between testicular volume and body weight, height, and body mass index (BMI). Materials and Methods: The testicular volumes of 1,002 young adult Korean men were measured for length, width, and thickness with ultrasonography, and data on BMI were collected conventionally. The correlation between testicular volume and BMI was analyzed with one-way ANOVA and Student's t-test. Results: The mean age of the young men was 23.02±2.53 years. The mean testicular volume was 18.09±3.79 cc on the left and 18.26±3.21 cc on the right. Testicular volume was directly proportional to body weight, height, and body mass index. Conclusions: The testicular volume of Korean young adult men was about 18.17 cc. Testicular volume has a weak direct correlation with body weight, height, and body mass index. Purpose: Testicular volume is one of the important indices that represent the reproductive ability of adult males. In previous studies, however, testicular volume was measured by manual palpation or orchidometer, resulting in inaccuracy or subjectivity. Accordingly, the need for accurate data on the size of the testes is increasing, and we conducted testicular volume measurements by using scrotal ultrasonography. We investigated the relationship between testicular volume and body weight, height, and body mass index (BMI). Materials and Methods: The testicular volumes of 1,002 young adult Korean men were measured for length, width, and thickness with ultrasonography, and data on BMI were collected conventionally. The correlation between testicular volume and BMI was analyzed with one-way ANOVA and Student's t-test. Results: The mean age of the young men was 23.02±2.53 years. The mean testicular volume was 18.09±3.79 cc on the left and 18.26±3.21 cc on the right. Testicular volume was directly proportional to body weight, height, and body mass index. Conclusions: The testicular volume of Korean young adult men was about 18.17 cc. Testicular volume has a weak direct correlation with body weight, height, and body mass index.
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고진공내의 데칸용매하에서 요오드화 n-프로필이 피리딘 및 α-피콜린과의 착물형성에 관한 연구
김영철,경진범,김세경,임종완 漢陽大學校 基礎科學硏究所 1992 基礎科學論文集 Vol.11 No.-
고진공내의 데칸용매하에서 요오도드화 n-프로필의 융해도를 5,15 그리고 25℃에서 피리딘과 α-피콜린이 존재할 때와 존재하지 않을 때의 두 경우에 대하여 각각 측정하였다. 데칸용매내에 요오드화 n-프로필의 용해도는 피리딘과 α-피콜린이 존재할 때가 존재하지 않을때 보다 더 크고, α-피콜린과 요오드화 n-프로필과의 상호작용이 피리딘과의 상호작용보다 더 강하게 작용한다는 것을 알 수 있었다. 그리고 피리딘과 α-피콜린이 데칸용매내에 존재할 때 요오드화 n-프로필과 피리딘 및 α-피콜린이 각각 불안정한 complex를 형성한다고 생각되어 이 complex를 여러 경우의 비율로 가정하여 계산해 본 결과 1:1 complex를 형성한다고 보는 경우의 평형상수 K값이 비교적 일정한 값을 나타내었다. 그러므로 1:1 complex즉 n-C₃3H?I·C?H?N과 n-C₃H?I·α-C?H?N이 용액속에 형성됨을 알았다. 또한 이 complex의 생성에 대한 엔탈피, 자유에너지 및 엔트로피의 변화도 산출하였다. The solubilities of n-propyl iodide in decane on high vacuum were measured at 5℃,15℃ and 25℃ in the presence and absence of pyridine and α-picoline. When pyridine and α-picoline exist in system respectively, the solubilities of n-propyl iodide in the presence and α-picoline are greater than in the absence, and the interaction of n-propyl iodide with α-picoline is stronger than with pyridine. In the presence of pyridine and α-picoline, it could be thought that n-propyl iodide forms unstable complex with pyridine and α-picoline. The complex was assumed in various ways and it was evaluated that the equilibrium constant K value was relatively constant under the assumption of 1:1 complexes. Thus, 1:1 complexes, n-C₃H?I·C?H?N and n-C₃H?I·α-C?H?N, are formed in the solution. Also, the changes of enthalpy, free energy and entropy for the formation of the complexes were calculated.
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