한우 성별에 따른 등심의 육질특성 비교

최정석, 정동순, 최석현, 이상화, 김종희, 최양일 忠北大學校 農業科學硏究所 2011 農業科學硏究 Vol.27 No.4

-본문참고-

Cr, Co, Cu, Ni와 Ca의 첨가에 따른 지하매설배관의 전기화학적 특성에 관한 연구

최윤석,신동호,심재주,김정구 대한금속재료학회 2005 대한금속·재료학회지 Vol.43 No.1

Aqueous corrosion characteristics of low carbon steel with small amounts of Cr, Co, Cu, Ni and Ca, in synthetic groundwater was studied by electrochemical corrosion tests (potentiodynamic test and electrochemical impedance spectroscopy (EIS) measurements) and analytical techniques. Neither carbon steel nor newly alloyed steels showed passive behavior in this synthetic groundwater. Newly alloyed steels, containing Cr-Co, Cr-Cu-Ni and Cr-Cu-Ni-Ca showed higher corrosion resistance than carbon steel in the potentiodynamic tests. EIS measurements showed that the Nyquist plot presented two time constants. The high frequency resistance component (R_(rsut)) and low frequency resistance component (R_(et)) were affected by the alloying elements. The polarization resistance (RP= R_(et) +Ra) of steels could be clearly ranked as Cr-Cu-Ni-Ca steel >> Cr-Cu-Ni steel > Cr-Co steel > carbon steel. Results of surface analyses (XPS and EPMA) showed that Cr and Cu were concentrated in the inner region of rust. However, Co and Ni were uniformly distributed all over the rust layer. These alloying elements improved corrosion resistance of low alloy steel in synthetic groundwater. Especially, Cr-Cu-Ni-Ca steel had the lowest corrosion rate due to the inner rust film formation during the initial stage of corrosion, which suggested a potential for substituting carbon steel in soil environment (Received October 29, 2004)

蔘茸扶正湯의 放射線 照射로 損傷된 組織 恢復 및 造血促進 效果

崔昇勳,安圭錫,金正洙 대한동의병리학회 1997 동의생리병리학회지 Vol.11 No.2

현재 서양의학에서 활용되고 있는 항암 요법으로는 外科處置, 化學療法, 放射線療法 및 免疫療法 等이 있으며, 그 중에서는 抗癌劑에 의한 화학요법과 방사선요법이 가장 많이 응용되고 있다. 그런데 이들은 癌細胞뿐만 아니라 正常細胞까지도 殺傷함으로써 腫瘍細胞를 억제하는 동시에 骨髓造血器, 消化系統 및 免疫機能을 포함하는 인체의 정상적인 기능을 손상시키는 문제점으로 그 사용에 제한을 받고 있다. 따라서, 본 연구는 蔘茸扶正湯의 항암요법으로 손상된 조직의 회복 및 조혈촉진 효과를 규명하기 위해 생쥐를 대상으로 하여 실험하였다. 그 결과, 생쥐 비장세포에 대한 增殖效果, 造血促進因子의 分泌能, 방사선에 대한 임파구의 防禦效果, 방사선에 대한 조혈세포 防禦效果, 방사선(9Gy)을 조사받은 생쥐의 生存率 등에서 유의성있는 결과를 얻어내어 아래와 같이 보고하는 바이다. Radiotherapy is an irreplaceable method of cancer treatment. But it has several side effects, especially damages to the hemopoietic and Immune system. Therefore radioprotectors are required to treat cancer successfully. A lot of Herbs and Herbal prescriptions are reported to have radioprotective effects. Above all, those to support the healthy energy and strengthen the body resistance are found more effective. This study was performed to evaluate the radioprotective effects of prescription Shenrong Fuzheng Tang(S. F. T), which consists of 16 kinds of herbs. We investigated proliferation of murine splenocytes, secretion of colony-stimulating-factors(CSFs), immunocompetence after irradiation in-vitro, and Endogenous spleen colony assay, survival assay in-vivo. When splenocytes were cultured with Shenrong Fuzheng Tang (S.F.T) (500㎍/㎖), proliferation was enhanced 5.7 times compared to control cultured with medium alone(P〈0.05) and, showed highest proliferation at 4th day after incubation. In order to evaluate stimulation of hemopoiesis of Shenrong Fuzheng Tang(S.F.T), the supernatant of splenocytes cultured with optimal concentration of Shenrong Fuzheng Tang(S.F.T) was used to measure CSFs secretion. The result showed enhanced secretion of colony-stimulating-factors(CSFs) compared to control(P〈0.05). To evaluate the protective effect of lymphocytes from irradiation, proliferation of splenocytes stimulated by LPS and ConA after incubation with Shenrong Fuzheng Tang(S.F.T) for 24h Prior to Irradiation(1∼3 Gy) was measured. The results showed higher proliferation of Shenrong Fuzheng Tang(S.F.T.) treated cells than that of non-treated cells. And percentage increases of irradiated splenocytes per non-irradiated splenocytes were also higher in Shenrong Fuzheng Tang(S. F. T)-treated cells than control. Endogenous spleen colony assay, to evaluate the protection of hemopoietic cells form irradiation, showed increased number of colonies(p=0.03) in Shenrong Fuzheng Tang(S.F.T) treated murine spleen(10.3±1.9) compared to non-treated murine spleen(3.4±0.8). Survival time of mice irradiated with lethal dose of γ-ray(9Gy) was prolonged in Shenrong Fuzheng Tang(S.F.T) treated group prior to irradiation as compared to non-treated group. According to these results we can suggest that prescription Shenrong Fuzheng Tang(S.F.T) has radioprotective effects and be used to protect the hemopoietic and immune system from damages of anti-cancer radiotherapy.

피부색을 이용한 얼굴 특징 성분의 실시간 검출

최찬석,이정문 강원대학교 정보통신연구소 2004 정보통신논문지 Vol.8 No.-

Face region detection is a very important step in the face recognition process for real-time applications. This paper presents a method to detect a face region using skin color information in Y·Cb·Cr color space. We propose a simple and highly applicable method of extracting facial features in the selected region. capturing a still image by a PC camera, we search a skin-like region using skin color filtering. Then we decide the face region by cropping the skin-like region. Finally, we extract each facial feature(eye, nose, mouth, and eyebrows) from the cropped region using histogram projection methods.

넙치의 백화현상 규명에 관한 연구 : Ⅰ. 멜라닌 색소 생성에 미치는 효소와 기질의 영향 Ⅰ. Effects of Enzyme Activities and Substrates on Melanin Formation

최영준,강석중,조창환,명정구,김종현 國立統營水産專門大學 附設 水産科學硏究所 1990 수산과학연구소보고 Vol.2 No.-

멜라닌 색소의 생합성 과정에 관여하는 것으로 알려져 있는 효소 및 관련 인자와의 상관성을 검토하기 위하여 자연산 정상넙치와 양식산 백화넙치의 肉質과 表皮, 미립자 사료와 생물먹이인 Artemia 및 Rotifer에 대하여 단백질의 함량, 멜라닌 색소생성에 고나여하는 효소의 활성, 아미노산 조성 및 비타민A와 C의 함량을 비교하였다. 정상넙치表皮는 肉質에 비하여 단백질의 함량이 높았으나, 백화넙치인 경우는 대체로 비슷한 값이었다. 사료중의 단백질 함량은 미립자 사료 중 C1이 가장 높았다. catechal oxidase의 활성은 기질과 조효소 농도의 증가와 더불러 증가하였으며, 백화 유무에 관계없이 거의유사한 값으로 나타났다. 그리고 L-dopa oxidase활성도 동일한 결과였다. 정상넙치의 유리아미노산 함량은 백화개체에 비하여 높았으며, 表皮의 경우는 정상넙치가 백화너치에 비하여 7.5배 가량 높은 값을 나타내었다. 필수아미노산의 조성으로 비교했을 때, 미립자 사료는 Artemia와 Rotifer보다 우수한 단백질원이었다. 그리고 정상넙치의 함활아미노산의 함유량은 백화넙치의 6.3배에 달하였다. 비타민A는 정상 및 백화넙치의 肉質과 表皮에서 검출되지 않았으나 비타민C는 정상인 접치表皮가 백화넙치 表皮에 비해 약 7.8배였으며, 미립자 사료는 100.83mg/100ㅎ으로서 사료 중 가장 높았다. 따라서 넙치表皮의 멜라닌색소의 생성에는 기질인 방향족 아미노산과 함황아미노산이 큰 영향을 미치는 것으로 판단되었다. The albinic phenomenon of flat-fish (Paralichthys olivaceus) was investigated by measuring protein content, tyrosinase activity, amino acid composition, and contents of vitamin A and C. These materials in the flat-fish feed-stuff were also tested. The amount of skin protein was higher than that of muscle in normal flat-fish. Catechol and L-dopa oxidase activity did not differ between normal and albinic flat-fish. The free amino acid of skin in normal flat-fish was 7.5 times that in albinic one. Sulfur-containing amino acid in normal flat-fish was also 6.3 times that in albinic ones. Vitamin A was not detected in both of flat-fish. The content of vitamin C in normal flat-fish was 7.8 times that in albinic one. The contents of protein, sulfur-containing amino acid and Vitamin C in micro-encapsulated feed (one commercial feed in Japan) were the highest among the feed-stuff used in this experiment. The melanin formation of flat-fish skin was affected by substrates such as aromatic amino acid and cofactor such as sulfur amino acid.

로드셀을 이용한 직물의 신축성 측정에 관한 연구

최정수,김은석,주기세,왕지남 한국경영과학회 2002 한국경영과학회 학술대회논문집 Vol.- No.1(1)

So far, the common elasticity data of textile fabrics has not been present because the method depends on the knowledge of measurement operators. In this paper, the new measurement equipment using road cell is presented to measure the coefficient of textile fabrics in real time. The measurement method is based on the volt: among textile fabrics. The textiles with strong elasticity are high voltage produced from others are low. The presented method can be applied to visualize the textile, sew the cloth, contrc textile fabrics. Also, these measurement datum are used to B2B electronic trading system.

직업적 디메틸아세트아미드(Dimethylacetamide) 노출에 의해 집단적으로 발생한 독성간염

최태성,우극현,김진석,박완섭,함정오,정상재,유재영 대한산업의학회 2001 대한직업환경의학회지 Vol.13 No.2

목적 : DMAC에 노출된 후 집단적으로 발생한 독성 간염 7례보고. 방법 : 2000년 2월 신설된 스판덱스 섬유제조 공장에 근무하는 생산직 근로자 178명중 2000년 2월 부터 8월까지 7명이 간장질환이 발생하였다. 환례들의 나이는 23∼47세였고, 남자 5명, 여자 2명이었다. 이들에 대해 혈액검사, 간 초음파 검사 등의 임상검사와 작업장 조사를 실시하였다. 결과 : 근무 부서는 중합 1명, 방사 1명, 권취 4명, 그리고 포장 1명이며 평균근무기간은 10주였다. 주 호소 증상은 심한 피로감, 어지럼증 및 황달이었고, 검사실 소견상 독성간염의 소견을 보였다. A, B 및 C형 간염 표지자 검사는 모두 음성이었고, 간초음파 소견상 특이 소견이 없었다. 문진 상 알코올 성 간염을 일으킬 정도의 음주력이나 최근 약물 복용력을 가지고 있는 환례는 없었다. 입원 후 보존적인 치료로 모두 급속히 호전되었다. 초기에 발생했던 환례에서 퇴원후 DMAC에 재 노출되어 독성 간염이 재발되었다. 이후 모든 환례들은 퇴원 후 DMAC 비노출 부서로 전환하였고, 퇴원후 지속적인 추적검사에서 간 효소 수치가 완전히 정상화되었고, 정상화되는 기간은 1∼2개월 정도 소요되었다. 결론 : 환례들의 임상증상, 검사결파, 노출력 및 과거력상 DMAC에 의한 독성간염으로 추정된다. Dimethylacetamide is widely used in the production of plasics, resins, synthetic fibers, and gums and in purification and crystallization processes. Inhalation of the vapor or skin absorption of the liquid of dimethylacetamide (DMAC) can cause liver damage. Toxic hepatitis possibly attributable to DMAC exposure occurred in seven works among 178 employees who had worked on a new spandex-fiber production line. A large amount of DMAC is used as a spinning solvent for synthetic fibers in the factory. The patients were aged 23-47 years old and composed of five males and two females. They were involved in the process of polymerization(1 patient), spinning(1), take-up(4) and packaging(1). The mean duration of exposure was 10 weeks. They experienced fatigue, dizziness and jaundice. The patients showed elavated total bilirubln, alanlne aminotransferase (ALT), and aspartate aminotransferase (AST) levels. The serologic test for viral hepatitis A, B and C were negative, as were the abdominal ultrasonographic scans. Based on the presumptive diagnosis of DMAC-induced toxic hepatitis, they were removed from the workplaces. One or two months after removal from the work, the transaminase levels returned to normal. The patients had no history of significant alcohol use, blood transfusion, recent medication, and drug abuse. As a result, authors could not find any attributable cause of toxic hepatitis but the toxicity by DMAC exposure.

건강인에서 결핵균 30-kDa항원이 말초혈액 임파구증식에 미치는 영향

최대경,고석신,김화중,조은경,백태현,신철식 충남대학교 의과대학 지역사회의학연구소 1991 충남의대잡지 Vol.18 No.1

T lymphocytes are thought to play a central role in cell mediated immune response. To Study the T lymphocyte proliferative response to 30-kDa antigen purified from Mycobacterium tuberculosis H37Rv, peripheral blood lymphocytes isolated from healthy subjects were stimulated with the 30kDa antigen, crude antigen or PHA. Healthy subjects were divided into three groups so that PPD(+), PPD(±) and PPD(-). The proliferations of lymphocytes were measured by the incroporation of ^3H-thyrnidine. The results were summarized as follows: 1. For the PPD(+) person, at concentration of < 1 ㎍/ml, the proliferative response to 30-kDa antigen resulted in a mild reduction but crude antigen showed relatively rapid reduction. For the PPD(-) person, decreasing the concentration of the both antigens showed rapid reduction of proliferation 2. The lymphocytes proliferations to 30-kDa antigen and crude antigen were significantly increased in PPD(+) group when compared to those in PPD(-) group, but PHA response was no significant difference. 3. The sensitivity and specificity of lymphocyte proliferation assay to 30-kDa antigen and crude antigen when compared with skin test results were 92.3%, 100% and 76.9%, 50%, respectively.

수평절골술에 의한 턱 성형술

정영하,최기영,김석권 대한성형외과학회 1992 Archives of Plastic Surgery Vol.19 No.3

Many methods are used for genioplasty, such as alloplastic implants, horizontal osteotomy, bone or cartilarge graft and so on. Among these methods, alloplastic implants and horizontal osteotomy are most frequently used. Augmentation of chin with a silastic rubber implant is the procedure of choice for mild form of microgenia. But this technique has disadvantages of possible malposition or bone erosion and is contraindicated in the patients with a moderate to severe degree of microgenia, which are apparent in both sagittal(anteroposterior) and horizontal dimensions. The preferred technique is the horizontal osteotomy, which yields excellent results, even in the difficult cases such as implant failure, asymmetry, or vertical mandibular disproportion. It is a safe, reliable, and simple procedure that is relatively free of either significant side effects or complications. We performed 6 cases of horizontal osteotomy and concluded as follows., 1. The procedure is relatively simple 2. This method is widely applicable to various conditions of chin deformity, and especially more natural degree of microgenia. 3. It effectively influences soft tissue in submental region as well as bone contour with a more natural aesthetic results. 4. The osteotomy line should be placed at least 2mm inferiorly to mental formen. 5. It is safe and relatively free of complications with maximal aesthetic results.

정신분열병 고위험군에서의 뇌영상 연구

최정석,권준수 大韓神經精神醫學會 2008 신경정신의학 Vol.47 No.5

The pafhophysiology of schizophrenia may be influenced by interaction of genetic, neurodevelopmental, environmental and/or psychological factors, which make it difficult to elucidate the etiology of the disorders through clinical phenomenology. Therefore it needs to find out endophenotypes specific to schizophrenia before onset of clinical expressions. Recently, many researchers have been concerned about subjects at high risk for schizophrenia genetically or clinically using neuroimaging techniques. In this review, we summarized neuroimaging findings performed on subjects at high risk for schizophrenia. In genetic high risk subjects, fronto-temporal abnormalities were observed, while clinical high risk subjects showed frontal abnormalities, suggestive of susceptibility markers to schizophrenia.