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강동수(Dong Soo Kang),최상용(Sang Yong Choi),이광찬(Kwang Chan Lee),김진승(Chin Seung Kim) 대한소화기학회 1993 대한소화기학회지 Vol.25 No.5
N/A The 19 months clinical experiences about 634 cases of laparoscpic surgery were reviewed at Sung-Ae General Hospital from July 1991 to Jan. 1993 The results were as follows; Among 168 cases of laparoscopic cholecystectomy and 5 cases of laparoscopic CBD exploration, we obtained better results with advantages of laparoscopic surgery including few complications, less morbidity and early return to work. In series of 361 cases of laparoscopic appendectomy, we obtained superior results especially in the cases of 1) uncertainty of clinically suspected appendicitis, 2) right lower quadrant pelvic pain without other pathology and 3) patients who wanted early return to work. In series of spontaneous pneumothorax with bullae and recurrent pneumothorax, the thoracoscopic bullectomy was much superior than open bullectomy. The laparoscopic Taylor procedures and laparoscopic bandlysis will be better choice in the management of intractable pain in duodenal ulcer and postoperative adhesion. The diagnostic laparoscopy will be much useful in the blunt and penetrating abdominal trauma.
실용음악 전공 학생들의 발성치료 전후 성대 및 음성 특성 비교
황연신,심미란,김철준,최용석,김상연,최찬호,선동일,Hwang, Yeon Shin,Shim, Mi Ran,Kim, Chul Jun,Choi, Yong Suk,Kim, Sang Yeon,Choi, Chan Ho,Sun, Dong Il 대한후두음성언어의학회 2016 대한후두음성언어의학회지 Vol.27 No.2
Background and Objectives : Many students major in applied music singing have various difficulties in phonation when they sing or perform. But the studies about this cause are lack. The purpose of this study is whether singing voice therapy based on vocal music is effective or not to applied music singing students that have difficulties in phonation. Materials and Methods : Singing voice therapy program had been done to 8 students major in applied music singing during 7 weeks. We did laryngeal stroboscope, perceptual, acoustic and aerodynamic examination before and after singing voice therapy to this students. And we studied post examination results have differences or improvements compared to pre examination results. Results : Four male students don't have effective improvement after singing voice therapy but they shows slight improvement in aerodynamic examination values compared to pre examination values. Four female students shows improvement in aerodynamic examination values and pitch range increasing. Above all, one student's vocal nodules disappeared after singing voice therapy. Conclusion : Singing voice therapy based on music singing is very effective to the students major in applied music singing. Above all, their curriculum in applied music singing should include phonation training based on music singing before training perform and technic practices.
Choi, Sang-Hoon,Oh, Chan-Ho The Korean Society for Integrative Biology 2000 Korean journal of biological sciences Vol.4 No.3
In the present paper, the immunostimulatory effects of the extracellular products (ECP) from Mycobacterium spp. and various adjuvants on the non-specific immune responses of Nile tilapia, Oreochromis nilotica, were examined. Nile tilapia were immunized by injecting ECP of Mycobacterium spp. (strain TB40, TB267 or the type strain Mycobacterium marinum) into their swim bladders. A variety of adjuvants like as Freund s complete adjuvant (FCA), Freund's incomplete adjuvant (FIA) and Titremax were similarly injected into additional groups of tilapia. The number of nitroblue tetrazolium (NBT)-positive cells observed in the swim bladder of the immunized fish was signigicantly increased by the fourth day post-immunization. By day 8, the numbers of NBT-positive cells were fewer in fish immunized with ECP from mycobacteria strains TB40 or TB267 than those immunized with ECP from M. marinum or fish injected with FCA or FIA. The level of Iysozyme activity detected in the serum of fish 40 alter immunization with ECP from various Mycobacterium spp. was also significantly higher than that found in the serum of the control fish. Head kidney macrophages showed enhanced reduction of NBT when cultured in vitro with 1 $\mu$ g/ml of ECP. Concentrations greater than this (10 or 100 $\mu$g/ml) were found to suppress the reduction of NBT by the macrophages. ECP from Mycobacterium spp. and the various adjuvants used in the study all appear to be good activators of the non-specific immune responses of Nile tilapia.
Nanopore Domain Growth Behavior by Nanopore Changes Near Domain Boundaries in Porous Anodic Alumina
Choi, Yong Chan,Bu, Sang Don American Scientific Publishers 2011 Journal of Nanoscience and Nanotechnology Vol.11 No.2
<P>We investigate the nanopore changes near domain boundaries during the nanopore growth in porous anodic alumina (PAA) to understand the domain growth behavior with the anodization time. In order to observe the pore changes with the time, we analyze cleavage planes of PAA according to the nanopore length using a field emission scanning electron microscopy. The domain growth can be explained with three kinds of nanopore changes observed near domain boundaries: a change of pore diameter, a pore-branching, and a pore-movement.</P>
Red ginseng extract promotes the hair growth in cultured human hair follicles
( Sang Hyung Lee ),( Gyeong Hun Park ),( Hong Il Cho ),( Sang Min Lee ),( Ji Su Han ),( Chong Hyun Won ),( Sung Eun Chang ),( Mi Woo Lee ),( Jee Ho Choi ),( Kee Chan Moon ),( Hyoseung Shin ) 대한피부과학회 2015 대한피부과학회 학술발표대회집 Vol.67 No.2
Background: Ginseng has been shown to promote hair growth in several recent studies. However, its effects on human hair follicles and its mechanisms of action have not been sufficiently elucidated. Objectives: This study aimed to investigate the hair growth promoting effects of red ginseng extract (RGE) and its ginsenosides. Methods: The proliferative activities of cultured humanhair follicles treated with RGE and ginsenoside-Rb1 were assessed using Ki-67 immunostaining. Their effects on isolated human dermal papilla cells (hDPCs) were evaluated using cytotoxicity assays and immunoblot analysis. We examined the ability of RGE and ginsenosides to protect hair matrix keratinocyte proliferation against dihydrotestosterone (DHT)-induced suppression and their effects on the expression of androgen receptor. The in vivo hair growth-promotingeffect of RGE was also investigated in C57BL/6 mice. Results: Both RGE and ginsenoside-Rb1 enhanced the proliferation of hair matrix keratinocytes. hDPCs treated with RGE or ginsenoside-Rb1 exhibited substantial cell proliferation. Moreover, RGE, ginsenoside-Rb1, and ginsenoside-Rg3 abrogated the DHT-induced suppression of hair matrix keratinocyte proliferation and the DHT-induced upregulation of the mRNA expression of androgen receptor in hDPCs. Murine experiments revealed that the subcutaneous injection of 3% RGE resulted in more rapid hair growth than the negative control. Conclusion: These results suggest that red ginseng may promote hair growth in humans.
A Clinico-Epidemiological Study of Acute Hepatitis in Korea: A Prospective Multicenter Study
( Chan Young Jeong ),( Gwang Hyeon Choi ),( Byung Seok Lee ),( Young Seok Kim ),( Youn Jae Lee ),( In Hee Kim ),( Sung Bum Cho ),( Jae Hyun Yoon ),( Kyung-ah Kim ),( Choi Dae Hee ),( Woo Jin Chung ),( 대한간학회 2021 춘·추계 학술대회 (KASL) Vol.2021 No.1