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정자 준비에서의 Wang's Tube 효과에 관한 연구
김영태,김용욱,김해중,김선행,나중열,구병삼,Kim, Young-Tae,Kim, Yong-Ook,Kim, Hae-Jung,Kim, Sun-Haeng,Rha, Joong-Yol,Ku, Pyong-Sahm 대한생식의학회 1991 Clinical and Experimental Reproductive Medicine Vol.18 No.1
Swim-up and Wang's tube system are known methods of motile sperm selection and aerobic bacterial removal from the raw semen. This study was designed to evaluate the recovery rate of motile sperm, % normal morphology of sperm, the efficiency of bacterial removal after sperm preparation by the above two methods. The results were as follows. 1. There was more significant increase of sperm concentration in preparation by swim-up than Wang's tube (p<0.05). The concentration of sperm by swim up was changed from $82.5{\times}10^6/ml$ to $6836{\times}10^6/ml$, and Wang's tube was changed from $82.5{\times}10^6/ml$ to $36.0{\times}10^6/ml$. 2. There was significant increase in sperm motility after preparation by two methods in comparison with initial sperm motility (p<0.05), but no statistical difference between two methods was noted. The % motility of sperm by swim-up was increased from 66.1% to 95.7% and Wang's tube from 66.1% to 98.1%. 3. There was significant increase of % normal morphology of sperm in the samples prepared by two methods (p<0.05), from 49.2% to 85.3% in swim-up and from 49.2% to 92.1% in Wang's tube, but there was no statistical significance between them. 4. There was no bacterial growth in aerobic culture after preparation by two methods.
"전분으로부터 D-Glucuronic acid의 제조"
김용욱,서정선 명지대학교 1972 明大論文集 Vol.5 No.-
An oxidized starch solution (800ml), prepd. by oxidation of 100g starch with HNO_3, in 1,000ml, 0.4N H_2SO_4, and 20ml 2% C_0SO_4 solution refluxed 55 min at 150±2℃, the soln. filtered with 3% carbon by oxidized starch, the filtrate coned, and the residue recrysta lized from methanol gave 23.5∼25.7 g/starch. The m.p. of glucuronolactone was 170∼2℃
金容旭,洪性善,柳萬聲 명지대학교 1971 明大論文集 Vol.4 No.-
This research was investigated the optimum conditions for the manufacturing monchlorobenzene by the chlorination of benzene. The results are as follows: 1. The highest yield of monochlorobenzene is 74% 2. The highest yield is acquired when chlorine gas is used 1.12 times of theoretical amount. 3. When the flow rate of chlorine gas is 30gr. per hour per one mole of benzene, the yield is maximum. 4. The optimum reaction temperature in about 30℃. 5. The optimum amount of catalyst (iron powder) is 0.007 mole per one mole of benzene.
Histoacryl을 이용한 분쇄 골절된 안면골 골편들의 재조합
조동환,김용욱,김경목 大韓成形外科學會 1997 Archives of Plastic Surgery Vol.24 No.5
It is not uncommon to encounter multiple bone fragments during open reduction of facial bone fractures. When these fragments are few and their sizes large, there is no problem. But multiple, small, and thin bone fragments are difficult to handle, making accurate reduction with interfragmentary wires very difficult. This is frequently encountered in fractures of the anterior maxillary wall, orbital floor, orbital roof, and frontal sinus. In this study, 10 patients who sustained facial fractures with multiple, small, and thin fragments were treated with tissue adhesive(N-butyl-2-cyanoacrylate). Post-operative 3 dimensional computer assisted tomography(CT) scans demonstrated an excellent reconstruction following this technique.
두개골의 3차원 영상 분석을 위한 전산화단층촬영 방법의 비교 : 상층 두께가 3차원 영상의 계측에 미치는 영향
정호걸,김기덕,박혁,김동욱,정해조,김희중,유선국,김용욱,박창서 대한구강악안면방사선학회 2004 Imaging Science in Dentistry Vol.34 No.3
Purpose : To evaluate the quantitative accuracy of three-dimensional (3D) images by means of comparing distance measurements on the 3D images with direct measurements of dry human skull according to slice thickness and scanning modes. Materials and Mathods : An observer directly measured the distance of 21 line items between 12 orthodontic landmarks on the skull surface using a digital vernier caliper and each was repeated five times. The dry human skull was scanned with a Helical CT with various slice thickness (3, 5, 7 mm) and acquisition modes (Conventional and Helical). The same observer measured corresponding distance of the same items on reconstructed 3D images with the internal program of V-works 4.0 (Cybermed Inc., Seoul, Korea). The quantitative accuracy of distance measurements were statistically evaluated with Wilcoxons’ two-sample test. Results : 11 line items in Conventional 3 mm, 8 in Helical 3mm, 11 in Conventional 5 mm, 10 in Helical 5 mm, 5 in Conventional 7 mm and 9 in Helical 7 mm showed no statistically significant difference. Average difference between direct measurements and measurements on 3D CT images was within 2 mm in 19 line items of Conventional 3 mm, 20 of Helical 3 mm, 15 of Conventional 5 mm, 18 of Helical 5 mm, 11 of Conventional 7mm and 16 of Helical 7 mm. Conclusion : Considering image quality and patient’s exposure time, scanning protocol of Helical 5 mm is recommended for 3D image analysis of the skull in CT.