고등어 및 정어리 선어의 휘발성성분

조우진,김훈,정연정,이영미,정은정,차용준 창원대학교 생활과학연구소 2002 생활과학연구 Vol.- No.6

This study was conducted to identify volatile compounds, associating with quality deterioration, which may play roles as indicators for quality assessment in fresh mackerel and sardine. Volatile compounds were analyzed by liquid liquid continuous extraction(LLCE)/GC/MSD methods. A total of 83 and 81 volatile compounds were detected in fresh mackerel and sardine, respectively, and these compounds were mainly composed of aldehydes(12 in raw mackerel, 11 in raw sardine), ketones(7, 4), alcohols(15, 14), esters(1, 3), aromatic compounds(13, 15), terpenes(5, 7), S-containing compounds(2, 2), hydrocarbons(13, 11) and miscellaneous compounds(2, 1). Most of compounds including carbonyls, alcohols, aromatic compounds and hydrocarbons were derived from lipid oxidation, and some compounds were detected from microbial degradation. It was supposed that LLCE method was proper to seek indicators for quality assessment in fresh mackerel and sardine, because of various volatile compounds derived from nonthermal lipid oxidation.

개에서 발생한 이혈종의 임상적 관리

이우철,윤기영,서경원,최호정,정성목,송근호,조종기,박성준 忠南大學校 獸醫科大學 附設 動物醫科學硏究所 2012 動物醫科學硏究誌 Vol.19 No.1

A 14-year-old male pomeranian was present with swollen left ear. The swelling occurred from base to apex of pinna. Otitis externa persisted for two years. Hematological and serum biochemistry values were not remarkable. The surgery treatment was the most appropriate method among indwelling drain, surgical, and steroid treatment in the aural hematoma because the dog was very sensitive to touching pinna and the size of aural hematoma. Longitudinal incision was applied after general anesthesia. Cefovecin was injected to prevent secondary infection. The outcome of surgery was good. There was no evidence of recurrence for one year.

Homomorphic Encryptions at a Long Distance Through Quantum Key Distribution Protocols

JEONG*, Kabgyun,KIM, Yong Jin,YOON, Jong Beom,KIM, Geon Woo,CHO, Gueha,KIM, Suntaek Korean Physical Society 2019 새물리 Vol.69 No.2

단위계 변화에 따른 차원과 수치 전환

조창범,강동식,강정우 濟州大學校 師範大學 科學敎育硏究所 1994 科學敎育 Vol.11 No.1

We extended the matrix method and the factor method which are used to convert unit systems and found the method which is useful to convert dimensions, numerical values the other unit system. The conversion method of dimension converts dimensions of the known unit system to those of the unit system which we wish to know by means of doing the product of the conversion matrix which is found out the corresponding relations of the fundamental quantity by the column matrix of dimension of the known unit systems. Using this method, the SI units are converted to Gaussian, esu, emu units and conversely esu, emu units are converted to SI units. However, the matrix method could not convert dimensions from Gaus-sian units to SI units. The conversion matrix of numerical value which is used to change numerical values from SI units to Gaussian units is found out from the corresponding relation of basic units. Besides some exceptional cases, we knew the relation of numerical values of the various units system.

Helicobacter pylori와 대장균의 Shuttle Vector 개발

조명제,이우곤,이상룡,김경희,안영숙,김성희,김현주,류복덕,최여정,윤영혜,백승철,전영석,이광호 경상대학교 유전공학연구소 1997 遺傳工學硏究所報 Vol.16 No.-

In this study, a vehicle vector using cryptic plasmids was constructed for gene transfer in Helicobacter pylori. pHP51(3.9 kb) and pHP489(1.2 kb) were selected for constructing vectors from cryptic plasmid of H. pylori isolates in Korea. The HindⅢ-digestedDNA fragment(1.2kb) of pHP489 and 1.6kb DNA fragment of pHP51 were ligated with a kanamycin resistance gene(aph3'-Ⅲ) from C. jejuni to produce the recombinant plasmids pHP489K and pHP51K, respectively. Transformation frequency of pHP51K by electroporation was low. But pHP489K could be effectively transformed into various H. pylori strains. In order to design an intermdiate vehicle vector for gene transfer into H. pylori, pBlueHP489K was prepared by recloning pHP489K DNA into pBluescript and pTZ19R vector. This vector permitted the DNA fragment containing pHP489 sequence, aph3'-Ⅲ, and cloned DNA to be cut and self-ligated in the SacⅠ site after cloning. ureA and ureB gene were inserted into pBlueHP489K, resulting in pBlueHP489K/AB. The DNA fragment containing pHP489, kanamycin resistance gene(aph3'-Ⅲ), and urease structural gene was cut away from pBlueHP489K/AB and self-ligated to generate pBlueHP489K/AB. pBlueHP489K/AB made urease-negative H. pylori strains restore their urease activity. By this experiment, pBlueHP489K was confirmed to be the vehicle system for transferring H. pylori genes.

중질유 탈황공정 폐촉매로부터 유가금속의 회수에 관한 연구

조정우,이정희,구덕모,김기석 嶺南大學校 工業技術硏究所 1995 工業技術硏究所論文集 Vol.23 No.1

In order to selectively recover by the extractive separation the value metals including V, Mo, Ni, Co, and Al from the spent catalysts removed from the resid desulfurization processes, we investigated the following: how to efficiently remove the nonmetallic impurities from the spent catalyst by roasting how to optimize the pore structure of roasted spent catalyst, how to select the suitable leachants and extractants, how to optimize the conditions of leaching/extraction, and how to determine the effective sequence of selectively recovering the value metals. With regard to roasting of spent catalyst, 550℃ was found to be the optimal roasting temperature in terms of sulfur removal and solubility of roasted catalyst in the sulfuric acid leaching solution as the specific surface area, porosity, and residual sulfur content were measured for the spent catalysts roasted at various temperatures in the tubular furnace. For the spent catalysts roasted at temperatures above 650℃, the efficiency of selectively recovering the value metals was diminished due to the decreased surface area and porosity, thereby the lowered solubility of roasted catalyst in the sulfuric acid leaching solution. In the case of roasting at 550℃, the ratio of (oxygen flow rate)/(volume of spent catalyst sample) equal to 30min?? was optimal for the efficient removal of sulfur from the spent catalyst. With regard to the selective recovery of value metals by leaching/extraction operations, two spent catalysts of different metal compositions as well as two model oxide mixtures simulating the metal compositions of those catalysts were experimented to determine the suited leachants/extractants and search for the effective sequences of selective recovery. The sequential recovery operation consisting of the solid-liquid separation via leaching and the liquid-liquid separation via extraction made it possible to selectively recover the value metals from both the model oxide mixtures and the spent catalysts. The differences in particle structure and component distribution between the model oxide mixture and the spent catalyst accounted for the differences in leaching, leaching conditions, and recovery sequences between the two. The sequences of selectively recovering the value metals which are relatively simple and of good potential to be applied in commercial scale were developed for the spent catalyst of two different metal compositions

자색고구마가 사염화탄소 투여에 의한 흰쥐의 간손상 보호에 미치는 영향

조영자,김현아,방미애,오용비,정병춘,문윤호,정우진 한국식생활문화학회 2003 韓國食生活文化學會誌 Vol.18 No.3

The purpose of this study was to investigate the effects of dietary purple sweet potato(lpomoea batatas) powder on serum lipid levels and antioxidative enzymes in normal and pretective effect on hepatotoxicity rats induced by carbon tetrachlolide. Four groups of rats (3-week-old inbred Sprague-Dawley male rats) were normal rats fed control diet(C)_(1) induced hepatotoxicity rats fed control diet(EC)_(1) normal rats fed purple sweet potato diet(P), and induced hepatotoxicity rats fed purple potato sweet diet(EP). Rats were induced by single injection of 50% carbon tetrachloide(0.1 mL/100 g B.W., i.p.). The rats were fed ad libitum each of the experimental diet for 5 weeks. After 5 weeks the rats were sacrificed and activities of antioxidant enzymes and lipid peroxidation products were determined in their liver homogenates. But serum concentrations of lipid was not significant in all groups. Serum alanine aminotransferase(ALT/GPT) and aspartate aminotransferase(ALT/GPT)of the EC and EP groups were heigher than the C and P groups. The hepatic glucose 6-phosphatase(G9Pase) activity of the group fed purple potato diet(P) was lower than the other groups(p<0.05). However, The glutathione peroxidase(GPx) activities was not statistically different between the groups. Renal glutathione S-transferase(GST) activity of the EC and EP groups were lower than the C and P groups(p<0.05). In conclusion, these results suggest that purple sweet potato is believed to be possible protective effect on hepatotoxicity rats induced by carbon tetrachlolide.

상이한 악궁처치방법에 따라 채득한 인상체의 보철학적 평가

정우인,조인호 단국대학교 치의학연구소 1996 논문집 Vol.8 No.1

The antagonisitic cast must accurately reproduce the occlusal morphologic features to simulate the actual clinical occlusoarticular situation in the articulator. Various preimpression preparation procedures have been used for obtaining the accurate quality of occlusal reproduction in taking irreversible hydrocolloid impressions. This study evaluated and determined how different procedures for preimpression preparation of the oral cavity influence the quality of the occlusal reproduction of teeth on the casts. In this study, bubble counts on the casts according to preimpression preparation or alginate types (normal set and fast set) were compared and analyzed. The results were as follows; 1. The bubble count on casts was increased in GroupⅠ, GroupⅢ, GroupⅣ and GroupⅡ, GroupⅤ in that order, and the quality of occlusal reproduction according to preimpression procedures showed GroupⅠ to be excellent. There was no significant difference between bubble counts according to alginate types. 2. There was significantly difference between bubble counts according to preimpression procedures in each of three bubble sizes(p<0.05). GroupⅠ in case of Type Ⅰ and Type Ⅱ bubbles, GroupⅠ and Group Ⅲ in the case of Type Ⅲ bubbles showed the lowest bubble count with stastically significant difference(p<0.05). 3. There was no significant difference between bubble counts according to alginate types in each of three bubble sizes(p>0.05). According to the results of this study, it was considered that the quality of occlusal reproduction was the most excellent when fluid hydrocolloid was finger -painted onto the occlusal surfaces in taking hydrocolloid impressions after the oral cavity and occlusal surfaces were dried by a vacuum suction and jet of air.

나노크리스탈 약물 전달 기술

황우신,황성주,박정숙,조정원 충남대학교 약학대학 의약품개발연구소 2012 藥學論文集 Vol.27 No.-

Nanotechnology affects on various aspects including medicine and pharmaceutics. This nanocrystal technology which transforms to nano-sized material is able to develop the innovational formulation strategy for poorly water-soluble drugs due to the change of physicochemical properties of drug. Scale-up methods using pearl milling or high pressure homogenizer was described and commercialized products based on nanotechnology were introduced in this manuscript.

Thermocouple을 이용한 Buchanan Plugger 표면의 온도상승 분석

조진숙,황윤찬,김선호,황인남,최보영,정영진,정우남,오원만 전남대학교 치의학연구소 2003 구강과학 Vol.15 No.4

This study was performed to confirm the actual temperature rise on the surface of Buchanan plugger by evaluating the temperature rise on the surface of it, the peak temperature of pluggers of various size using thermocouple. The heat carrier system 'System B Heatsource' (Model 1005, Analytic Technologies, USA) and the Buchanan pluggers of F, FM, M and ML sizes are used for this study. The temperature was set to 200 which Dr. Buchanan's "Continuous wave of condensation" technique recommended on digital display and the power level on it was set to 10. The touch mode was used. Five thermocouples were placed in direct contact with the surface of each size of Buchanan's pluggers at 1 ㎜ increments from the tip to the 4 ㎜ length of shank. Each thermocouple was secured with cyanoacrylate adhesive and orthodontic resin block. The two wire leads of each thermocouple were connected to the appropriate channels of Data Logger. This was configured to simultaneously record input from the five thermocouples. The heat control spring was touched for 1, 2, 3, 4 and 5 seconds, and the temperature rise on the surface of the pluggers were measured at 1 sec intervals for more than 5 seconds with an accuracy of 0.01. Ten trials was determined for each plugger. The average of temperature rise and standard deviation was calculated for each size of plugger. The data were statistically analyzed by one-way ANOVA to determine their significance. The results as follows. 1. The position at which the temperature peaked was approximately at 1∼2㎜ far from the tip of Buchanan plugger (p<0.01). 2. The peak temperature was 215.25±2.28℃ in F plugger, 185.94±2.19℃ in FM plugger, 169.51±9.12℃ in M plugger, and 160.79±1.27℃ in ML plugger and the peak temperature was highest in F type and followed by, in descending order, FM type, M type. ML type showed the lowest peak temperature (p<0.01). This results suggest that the actual temperature on the surface of the pluggers does not correlate well with the temperature set on digital display. Heat concentrates around the tip. The larger plugger reveals lower temperature rise relatively.