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The phase analysis of spark plasma sintered MgB2 after ball milling.
Kang, Deuk-Kyun,Kim, Dong-Woong,Kim, Cheol-Jin,Ahn, In-Shup American Scientific Publishers 2010 Journal of nanoscience and nanotechnology Vol.10 No.1
<P>Mg and amorphous B powders below 10 and 3 micro meter were used as raw materials, and mixed by planetary-mill for 9 hours at argon atmosphere. MgB2 bulk was fabricated at the various temperatures by Spark Plasma Sintering. In the sintering process, mixed powders were sintered in graphite mold, at the pressure of 55 Mpa. The fabricated MgB2 samples were evaluated with XRD, EDS, FE-SEM, PPMS. MgB2, MgO and Fe phases were observed from XRD result. In the results, MgO and Fe were impurity which may affect superconducting properties of MgB2 samples, and it's distribution could be confirmed from EDS mapping result. In order to confirm the formation of MgB2 phase, DTA was used as heating rate of 10 degrees C/min at Ar atmosphere from room temperature to 1200 degrees C. In the PPMS result, the Tc (critical temperature) was about 21 K, and the density of spark plasma sintered samples increased to 1.87 g/cm3 by increasing sintering temperature.</P>
Oral Leiomyosarcoma in a Woodchuck (<i>Marmota monax</i>)
KANG, Byeong-Cheol,JANG, Dong-Deuk,LEE, Sang-Koo Japanese Society of Veterinary Science 2005 The Journal of veterinary medical science Vol.67 No.3
<P>We report the case of a 4-year-old female woodchuck (<I>Marmota monax</I>) which presented with a white, firm and discrete mass in the hard palate. The mass extended into the oral cavity but it was well separated from the surrounding tissues. Histology of the tumor showed a malignant mesenchymal tumor with pleomorphic spindle cells varying in degrees of differentiation and density. The neoplastic cells had moderate amounts of granular or fibrillar eosinophilic cytoplasm with indistinct cell margins. Nuclei were oval to elongated and frequently blunt-ended with vesicular chromatin. Immunohistochemical study showed that the neoplastic cells expressed vimentin and alpha-smooth muscle actin but did not express desmin, pan-cytokeratin, and S-100. Therefore, histology and immunohistochemistry revealed that the tumor was oral leiomyosarcoma. Oral cavity is an extremely rare site for leiomyosarcoma and the present case is the first report of spontaneous oral leiomyosarcoma in animals.</P>
이철,이우천,라종득,고한석,남기헌,고강훈 대한골절학회 2001 대한골절학회지 Vol.14 No.4
Purpose: To investigate the indication of transfixation of distal tibiofibular syndesmosis. Materials and Methods: Twenty-two patients were surgically treated for diastasis of the distal tibiofibular syndesmosis and followed for more than one year. The decision to transfix the syndesmosis was made according to the result of intraoperative stress test. Results: In patients with bimalleolar fracture, good or excellent clinical results were obtained in all patients, and no widening of the medial clear space and 1㎜ or no widening of the tibiofibular clear space was observed. In patients with deltoid ligament tear, good or excellent results were obtained in five patients, and the medial clear space was widened more than 1㎜ in three patients and tibiofibular clear space was widened 2㎜ or more in four patients. Conclusion: We be1ieve that transyndesmotic fixation is not required if anatomical bimalleolar fracture fixation is achieved, and in patients who have deltoid ligament rupture, it may be better to transfix the syndesmosis regardless of the level of fibular fracture.
대퇴 비구 충돌 진단에서 양측 고관절 단순 전후방 방사선 사진의 유용성
황득수 ( Deuk Soo Hwang ),남대철 ( Dae Cheol Nam ),양재훈 ( Jae Hoon Yang ),강태환 ( Tae Hwan Kang ) 대한고관절학회 2007 Hip and Pelvis Vol.19 No.2
목적: 대퇴 비구 충돌을 일으키는 대퇴 경부의 pistol grip 변형을 확인하는데 이용되는 다양한 방사선 촬영 중 양측 고관절 단순 전후방 방사선 사진을 이용한 일차적인 감별진단 및 유용성에 대해 알아보고자 하였다. 대상 및 방법: 2004년 3월부터 2006년 3월까지 대퇴 비구 충돌증후군으로 관절경적 치료를 시행받은 20세에서 50세까지의 27명의 환자(양측 대퇴 비구 충돌군 5예)를 대상으로 시행한 수술전 단순 방사선 촬영(Both Hip AP, Frog leg lateral, Groin lateral, False profile)중 일차적으로 양측 고관절 단순 전후방 방사선 사진에서 대퇴골 경부의 가장 협소한 부위와 대퇴골 두 지름, 그리고 두 선사이의 이분점 (이 부위는 대퇴경부 전상방 융기 부위로 추정)에서의 대퇴골 두 길이를 측정하였다. 대조군으로는 고관절 동통을 호소하지 않는 동일 연령군의 15명의 정상인(30예)에서 양측 고관절 단순 전후방 방사선 사진에서 실험군과 같은 방법으로 측정한 3 가지의 길이의 비를 각각 서로 비교 하였다. 결과: 실험군에서의 대퇴골 두 지름은 평균 53.45 mm, 최소 경부 길이는 37.58 mm, 두 선의 중간점의 대퇴골 두 길이는 41.52 mm였으며, 대조군에서의 대퇴골 두 지름은 53.38 mm, 최소 경부 길이는 35.43 mm, 그리고 두선의 중간의 대퇴골 두 길이는 39.03 mm였다. 대퇴골 두 지름과 최소 경부 길이의 비는 실험군 0.67, 대조군 0.65로 비슷하였으나, 대퇴골 두 지름과 중간점의 대퇴골 두 길이비는 실험군 0.84, 대조군 0.75이었다(p=0.01). 결론: 고관절의 동통을 주소로 내원한 환자에서 단순 전후방 방사선 사진 상 pistol grip 변형을 의심 할 수 있는 실질적인 수치를 확인코자 하였으며, 대퇴골 두 직경과 골두와 경부 중간부위 직경 비율이 0.8이상인 경우 비구 충돌증후군을 진단하는데 일차적인 지표로 유용할 수 있었다. Purpose: We wanted to report the usefulness of both hip AP views, which are some of the various radiographs that are used as a primary diagnostic method for identifying the pistol grip deformity of the femur. Materials and Methods: There were 27 cases in patients who were from 20 to 50 years old and who had undergone arthroscopic treatment for femoroacetabular impingement (5 cases of both femoroacetabular impingement) from March 2004 to March 2006, Their preoperative radiographs (both hip APs, the frog leg lateral, the groin lateral and the false profile) were investigated; the most narrow point of the femoral neck, the diameter of the femoral head, the length of the femoral head at the midpoint of these two lines (which is assumed to be the anterosuperior prominence of the femoral neck) were measured on both hip AP views. 15 persons of the same age and who didn`t have hip joint pain were chosen as the control group (30 cases) and the same measures was performed and then retrospectively compared with the FAI group. Results: In the FAI group, the femoral head diameter was 53.45 mm, the minimal femoral neck length was 37.58mm and the femoral head length at the midpoint was 41.52 mm. In the control group, the femoral head diameter was 53.38 mm, the minimal femoral neck length was 35.43 mm and the femoral head length at the midpoint was 39.03mm. The ratio of the femoral head diameter to the minimal femoral neck length was 0.67 in the FAI group and it was 0.65 in the control group; this was similar in both groups. Yet the ratio of the femoral head diameter to the femoral head length at the midpoint was 0.84 in the FAI group and this was 0.75 in the control group (p=0.01). Conclusion: We tried to define the actual value that allows physicians to estimate the pistol grip deformity on both hip AP view of the patients who have hip joint pain, and the ratio of the femoral head diameter to the minimal femoral neck length can be a useful primary indicator for diagnosing femoroactabular impingement when this is over 0.8.
이송득,강신정,이종필,박상용,정영자,성락선,고재철,원도희 식품의약품안전청 1997 식품의약품안전청 연보 Vol.1 No.-
모려71루는 Osfreafigas말Itunberg의 껄질로 대한약전, 일본약국방 및 신농본초경의 상품으로 수재되어 았으며,진경안신 (뜰론촌혀), 평갈잠얄(꾸쁠탄), 수렴고삽(찬찮르ie), 연견산결 (3k몰곰) 등의 약리작용을 나타내며, 쬐근에는 칼슘보급제로 널리 사용피고 있다. 따라서 모려가루의 칼슘함쟌을 0.051w-EDTA로 적정하여 측정한 결과 칼슘으로써 11.I~34.6%였고, 개별 중금속 둥의 오염을 파악하고자 As, Cd, Cu, Mg, Mn, Pb, Sb, Sn, Zn둥 금속함량을 ICPS로 분석한 결자 As, Cd, Cu, Pb, Sb, Sn, Zn 은 검출되지 않았고, Mg은 0.es~e.707ppm을, Mn은 0.OO3~0.296ppm을 함유하고 있는 겄으로 나타났다. 또한 모려가루의 품질을 평가하고자 대한약전에 따라 화인시칩 , 순도신험, 건조감량 등을 실시하였으며, 그 결과 순도시험항의 산불용물의 경우 기준치에서 상당히 벗어났으며, 칼슘함량이 갇소할수록 산불용물은 증가하는 경향을 보였으므로 원료의 전처리과정에 대한 규제가 필요하며 , 표준 모려가루의 확보가 시급하며 표준 모려가루애 따라 전반적으로 규격기준이 재설정되어야 할 것으로 사료된다. According to the monograph of powdered Oyster shell in the Korea Pharmacopoeia, we carried out the quality evaluation in 13 samples. All of them were passed on identification except for color change. The impurity test on acid insoluble residues was difficult to determine because of the vague test method. So we established new test method which decreases the sample size and modifies the procedure. Contents( % ) of Calcium in powdered Oyster shell were from 11.1 to 34.6% with 0.05M-EDTA titration. And the levels of trace metals were determinated using inductively coupled plasma spectrometer. The metals of As, Cd, Cu, Pb, Sb, Sn and Zn were not detected but the levels of Mg were from 0.05 to 0.707ppm and Mn were from O.003 to 0.296ppm.