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제 3형 급성 견봉-쇄골 관절 분리 환자의 수술적 치료 결과
한성호,양보규,이승림,정선욱,이동호,김민석 대한골절학회 2003 대한골절학회지 Vol.16 No.2
목적 : 본 연구를 통하여 Rockwood 제 3형 급성 견봉-쇄골 관절 분리 환자에서 Phemister 술식과 modified Phemister 술식의 치료 결과를 비교하고자 한다. 대상 및 방법 : 1992년 2월부터 2001년 8월까지 제 3형 급성 견봉-쇄골 관절 분리로 수술적 치료를 받고 1년 이상 추시 가능하였던 45명, 45예의 환자를 대상으로 하였다. 평균 연령은 28.1세였으며, 남자가 42명, 여자가 3명이었다. 진단은 이학적 검사와 단순 방사선 부하 촬영법을 이용하였으며, 수상일로부터 수술적 치료까지의 평균 기간은 7.8일이었다. 술장 소견상 오구-쇄골인대 봉합술이 어려운 15예에서는 Phemister 술식을 시행하였고 (Ⅰ군), 인대 봉합이 가능한 30예에서는 modified Phemister 술식을 시행하였다(Ⅱ군). 수술 후 추시 기간은 평균 16.2개월이었고, 결과 판정은 최종 추시 때의 임상 소견과 이학적 검사 및 방사선 촬영을 통해 UCLA shoulder scoring system과 acromio-clavicular separation scoring system을 이용하였다. 결과 : 술후 합병증은 Ⅱ군에만 표재성 감염이 2예, K-강선 이주가 1예에서 발생하였다. 최종 추시상 전예에서 동통, 관절 운동 범위의 제한은 없었고 , Ⅱ군에서만 방사선 촬영상 2예에서 아탈구가 관찰되었다. UCLA shoulder scoring system은 Ⅱ군에서 우수 93.3%, 양호 6.7%였고, acromio-clavicular shoulder scoring system은 Ⅱ군에서 우수 90%, 양호 10%였다. 결론 : 활동적인 연령에서 발생한 제 3형 급성 견봉-쇄골 관절 손상의 환자에서 Phemister 술식만으로도 좋은 결과를 보일 수 있을 것으로 사료된다. Purpose : The purpose of this study is to compare the Phemister technique with the modified Phemister technique for the patients with Rockwood type 3, acromio-clavicular separation. Materials and Methods : The 45 cases of 45 patients received surgical treatment for Rockwood type 3, acute acromio-clavicular separation in our hospital from Feb. 1992 to Aug. 2001 later with the follow-up study were selected as subjects. The average ages were 28.1 years old, male and female were 42, 3 persons, respectively. Physical examination and plain radiography were used for their diagnosis and the intervals between injury and surgical treatment were 7.8 days. In intraoperative finding, we performed Phemister technique in 15 cases according not to be able to repair coraco-clavicular ligament (groupⅠ), modified Phemister technique in 30 cases according to be able to repair that (groupⅡ). The average follow up period was 16.2 months, and the UCLA shoulder scoring system and the acromio-clavicular separation scoring system were used to obtain clinical results. Results : Only in Group Ⅱ, the complication after surgery were associated with superficial infection in two cases and K-wire migration in one case. At last follow up, there were no pain and limitation of range of motion in all cases, and two cases in Group Ⅱ were found to be subluxation in radiography. Clinical results revealed excellent was 93.3%, good was 6.7% in UCLA shoulder scoring system in both groups, and excellent was 90%, good was 10% for group Ⅱ in acromio-clavicular separation scoring system. Conclusion : The results are considered to be food with only Phemister technique in type 3, acute injury occurred in working ages.
Ho-Sung Yoon,Seung-Joon Yoo,Chul-Joo Kim,Kyung Woo Chung,Jin Young Lee,Shun-Myung Shin,Su-Jeong Lee,A-Ram Joe,Se-Il Lee 한국화학공학회 2014 Korean Journal of Chemical Engineering Vol.31 No.10
We studied the leaching kinetics of recovering neodymium in sulfuric acid from the rare earth elements(REE) slag concentrated by smelting reduction from a magnetite ore containing monazite. The leaching kinetics onneodymium was conducted at a reactant concentration of 1.5 g REE slag per L of 0.3 M H2SO4, agitation of 750 rpmand temperature ranging from 30 to 80 oC. Neodymium oxide included in the REE slag was completely converted intoneodymium sulfate phase (Nd2(SO4)3) in H2SO4 after the leaching of 5 h, 80 oC. As a result, the leaching mechanismwas determined in a two-stage model based on the shrinking core model with spherical particles. The first step wasdetermined by chemical reaction, and the second step was determined by ash layer diffusion because the leaching ofREEs by the first chemical reaction increases the formation of the ash layer affecting as a resistance against the leaching. By using the Arrhenius expression, the apparent activation energy of the first chemical reaction step was found to be9kJmol−1. After the first chemical reaction, leaching reaction rate was determined by the ash layer diffusion. The apparentactivation energy of ash layer diffusion was found to be 32 kJmol−1.
PGE1의 국소 도포가 백서의 임의형 피부판 및 혈압에 미치는 영향
신극선,정섬,정재호 大韓成形外科學會 1996 Archives of Plastic Surgery Vol.23 No.4
Salvaging the compromised random pattern flap remains a challenge for plastic surgeons. For the purpose of augmenting blood flow, vasodilators have previously been used in an attempt to improve survival of ischemic skin flaps. One such agent, prostaglandin, a vascular smooth muscle relaxant and a inhibitor of platelet aggregation, has been widely used clinically to improve peripheral circulation. But when used intraarterially of intravenously, systemic side effects such as hypotension, nausea, dizziness, and diarrhea were frequent. This study was designed to investigate the survival of random skin flaps and blood pressure when prostaglandin E1 was applied topically. Sprague-Dawley rats (N=30) were divided into control group (N=10); hydrogen base ointemnt only aplied, intraperitoneal group (N=10); PGE1 1㎍/kg injected intraperitoneally, and topical group (N=10); PGE1 powder mixed in hydrogen-base ointment (1㎍/kg) applied topically (N=10). A classic Mcfarlane random type flap (10 ×4cm) was elevated on the dorsum of rats. Blood pressure was measured by indirect tail plethsmography every 5 minutes until normalization. After seven days each animal was evaluated for percentage area of flap survival and the following results were obtained; 1. Flap survival areas in the PGE1 intraperitoneal injected group (65.2%) and topically applied group (82.9%) were greater than the control group (55.5%). 2. Blood pressure decrease of an average of 7mmHg was seen in the PGE1 intraperitonel injected grop. 3. No blood pressure change was in the control and topical appled groups. These experimental data suggested that topical application of PGE1 increased random flap survival without lowering blood pressure and thus may offer the same benefit of increasing area of survival in the compromised random flap but without the common side effects.
Kun-Che Ho,Cheng-Chung Lin,F. Selin Bagci,Shun-Chung Wang,Yi-Hua Liu,Yu-Shan Cheng 전력전자학회 2019 ICPE(ISPE)논문집 Vol.2019 No.5
In this study, three swarm intelligence (SI)-based maximum power point tracking (MPPT) techniques for photovoltaic generation systems (PGSs) operating under partially shaded conditions (PSCs) are investigated. The compared methods include particle swarm optimization (PSO), firefly algorithm (FA) and cuckoo search (CS). Simulated results for 252 different shading patterns will be provided and some conclusion will be made. This study presents reference information for scholars planning to carry out research in this field.
( Chul Joo Kim ),( Ho Sung Yoon ),( Kyung Woo Chung ),( Jin Young Lee ),( Sung Don Kim ),( Shun Myung Shin ),( Hyung Seop Kim ),( Jong Tae Cho ),( Ji Hye Kim ),( Eun Ji Lee ),( Se Il Lee ),( Seung Joo 한국화학공학회 2015 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.53 No.1
A leaching kinetics was conducted for the purpose of recovery of praseodymium in sulfuric acid (H2SO4) from REE slag concentrated by the smelting reduction process in an arc furnace as a reactant. The concentration of H2SO4 was fixed at an excess ratio under the condition of slurry density of 1.500 g slag/L, 0.3 mol H2SO4, and the effect of temperatures was investigated under the condition of 30 to 80 oC. As a result, praseodymium oxide (Pr6O11) existing in the slag was completely converted into praseodymium sulfate (Pr2(SO4)3o8H2O) after the leaching of 5 h. On the basis of the shrinking core model with a shape of sphere, the first leaching reaction was determined by chemical reaction mechanism. Generally, the solubility of pure REEs decreases with the increase of leaching temperatures in sulfuric acid, but REE slag was oppositely increased with increasing temperatures. It occurs because the ash layer included in the slag is affected as a resistance against the leaching. By using the Arrhenius expression, the apparent activation energy of the first chemical reaction was determined to be 9.195 kJmol-1. In the second stage, the leaching rate is determined by the ash layer diffusion mechanism. The apparent activation energy of the second ash layer diffusion was determined to be 19.106 kJmol-1. These relative low activation energy values were obtained by the existence of unreacted ash layer in the REE slag.