Bifidobacterium angulatum으로부터 α-galactosidase의 정제 및 특성

강대중,민해기,강국희 成均館大學校 科學技術硏究所 1993 論文集 Vol.44 No.1

α-galactosidase는 (α-D-galactoside galactohydrolase: EC 3.2.1.22)는 다당류나 올리고당인 melibiose, raffinose, stachyose와 guar gum 등의 α-galactosidic 결합을 하고 있는 당을 분해하는 효소이다. 장내세균중 우익균이며 우세균주인 Bifidobacteria로부터 α-galactosidase의 효소학적 특성을 알아보기 위하여 배양여액으로부터 ammonium sulfate분획, 핵산의 제거, Sephadex G-200 gel filtration 및 DEAE-Sephadex A-50 ion exchange chromatography 등의 4단계 정제과정을 거쳐 정제한 결과 약 8배로 정제되어 단일 단백질로 분리하였다. 또한, 효소분해산물을 알아보기 위하여 TLC에 의하여 당분해 및 올리고당의 생성을 알아보았다. 정제효소의 활성 최적온도는 37℃, 최적 pH는 7.0이었다. 효소활성이 K^+, Zn^2+과 같은 금속이온과 8-Hydroxyquinoline, Sodium Bisulfite 등에 의해선 그다지 저해되지 않았으나, Hg^+, Cu^2+과 p-Chloromercuribenzoic acid에 의해선 저해되었다. 효소의 분자량이 301, 995, 합성기질인 PNPG에 대한 K_m은 0.069mM, V_max는 347.22μmol/min.mg protein이었다. To elucidate enzymatic properties of α-galactosidase (EC 3.2.1.22) from Bif.angulatum. α-galactosidase was purified to homogeneity by ammonium sulfate fractionation, protamine sulfate precipitation, sephadex G-200 gel filtration, and DEAE-sephadex A-50 ion exchange chromatography. The purified α-galactosidase was found tobbe homogeneous by SDSpolyacrylamide gel electrophoresis. The molecular weight of this enzyme, estimated by sepadex G-200 gel filtration, was about 301,995. The optimum conditions for the enzyme reaction was pH 6.5 to 7.0 at 37℃. The purified enzyme was stable at 45℃ or below and in buffer at pH 6 to 7.0. The activity was inhibited by mercury, copper ion, and p-chloromercuribenzoic acid. The kinetics of this enzyme, with p-nitrophenyl-α-D-galactoside as substrate, was determined : K_m was about 0.069mM and V_mas was 347.22 μmoles/min mg protein.

단신 : 실리콘의 염소화반응에 의한 사염화규소 제조

박균영 ( Kyun Young Park ),이미선 ( Mi Sun Lee ),김민철 ( Min Cheol Kim ),이찬희 ( Chan Hee Lee ),박회경 ( Hoey Kyung Park ),강태원 ( Tae Won Kang ),정해성 ( Hae Seong Jeong ),한경아 ( Kyoung Ah Han ),허원회 ( Weon Hoe Huh ),유지 한국화학공학회 2013 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.51 No.3

직경 25 mm의 파이렉스 튜브 내에서 실리콘의 유동층 염소화 반응이 수행되었다. 반응기에 공급되는 질소 유량0.8~1.0 L/min, 염소 유량 0.2 L/min, 반응온도 450℃, SiCl4 응축기의 냉매온도는 -5℃로 설정하였다. 반응기에 도입되는 가스 내 염소의 몰분율이 증가하면 SiCl4의 수율이 증가하였다. 반응가스 중 염소의 몰분율 0.2의 조건에서 SiCl4의 수율은 28% 이었다. 염소의 몰분율 증가는 반응열 상승에 의해 반응온도 상승을 가져옴으로써 안전을 고려하여 염소의 몰분율을 0.2 이상으로 올리지 못했다. 실리콘의 유동층 염소화 반응에 의한 사염화실리콘의 제조 가능성이 입증되 었으며, 향후 보다 가혹한 조건에서의 실용화 연구를 위한 기초로 활용될 수 있을 것으로 기대된다. The chlorination of a metallurgical-grade silicon was carried out in a fluidized bed reactor, 25 mm in diameter. The flow rate of the chlorine admitted into the reactor was 0.2 L/min and that of the carrier nitrogen was 0.8~1.0 L/ min. The reactor temperature was maintained at 450℃ and the temperature of the coolant at the SiCl4 condenser was at -5℃. The SiCl4 yield increased with increasing the mole fraction of chlorine in the feed gas, exhibiting 28% at the mole fraction of 0.2. Further increase of the chlorine mole fraction was not attempted in a worry that the reactor might be failed due to the high exothermicity of the reaction. The production of SiCl4 from silicon by fluidized bed chlorination was demonstrated on a laboratory scale, which is a stepping stone for future studies under more severe conditions toward industrial application.

로스팅 서리태를 이용한 음료 제조 및 품질 평가

정수옥,김혜연,한정순,김민주,강미숙,김애정,Jeong, Soo-ok,Kim, Hae-yean,Han, Jung-soon,Kim, Min-ju,Kang, Mi-sook,Kim, Ae-Jung 한국식품영양학회 2016 韓國食品營養學會誌 Vol.29 No.4

This study was performed to develop and evaluate beverage prepared with optimally roasted seoritae to maximize the isoflavone content and antioxidant activities of the beverage. Isoflavone content was maximized at the roasting temperature of $110^{\circ}C$ for 20 min. Both DPPH radical scavenging activity and ABTS radical scavenging activity along with total polyphenol content were highest when seoritae was roasted at $110^{\circ}C$ for 20 min. Western blotting was used to determine the level of nuclear factor of activated T-cells 1(NFATc1) involved in controlling osteoclast differentiation. The results showed that NFATc1 had a concentration-dependent inhibitory effect when the RoS110 (roasted seoritae at $110^{\circ}C$ for 20 min) samples were processed at varying concentrations (10, 50, and $100{\mu}g/mL$). Tea samples were prepared from optimally roasted seoritae by varying brewing times (5~90 min) at $65^{\circ}C$, and tea brewed for 60 min had the highest preference with $65^{\circ}C$ as the preferred temperature for drinking.

윤상 다륜형 아급성 피부 홍반성 루푸스 1예

강민정,박혜진,조소연,이미애,황규광,함정희 대한피부과학회 1999 대한피부과학회지 Vol.37 No.6

We report an annular type of subacute cutaneous lupus erythematosus(SCLE) which is rare in Korea, A 23-year-old female had erythematous annular rashes with a mild itching sensation on the face, trunk and both extremities. She also had painless oral mucosal ulceration, diffuse hair loss and mild arthralgia. Serologic abnormalities of the patient were positive anti-Ro Ab, ANA and Anti-ds-DNA Ab. The histopathologic findings showed vacuolar degenerations in the basal cell layer, mononuclear cell infiltrate in the upper dermis, and dermal edema. Direct IF revealed granular deposition of IgG and IgA at the dermo-epidennal junction.

α-Galactosidase 에 의한 Bifidobacteria 균수 측정에 관한 연구

강국희,이시경,백운화,민해기 成均館大學校 科學技術硏究所 1992 論文集 Vol.43 No.2

This method using the synthesis substrate of 5-bromo-4-chloro-3 indolyl-galactoside (X-a -Gal) was examined for the differential enumeration of Bifidobacteria and lactic acid producing bacteria. Bifidobacteria possess a high level of a-galactosidase activity. Bifidobacterium longum KCTC 3215 exhibited the highest a- galactosidase specific activity (8.57 units/mg protein). Determination of a -galactosidase activity using the PNPG procedure showed that Lactobacillus, Streptococcus, Pediococcus, and Leuconostoc strain had lower a-galactosidase activity as compared to Bifidobacteria. The X-a- Gal based medium is useful to identify Bifidobacteria among lactic acid producing bacteria since the enzyme action of a-galactosidase hydrolysis X-a-Gal substrate and releases indol which impacts a blue color to Bifidobacterial colonies on agar plates. All strains of Bifidobacteria appeared blue colonies on MRS agar medium supplemented with 100 uM X- a - Gal while colonies of other lactic acid producing bacteria appeared white or light blue.

Bifidobacterium의 成長促進物質에 관한 硏究

姜國熙,張永斅,閔海基 成均館大學校 科學技術硏究所 1992 論文集 Vol.42 No.2

The objective of this study wsa to improve the usability of Bifidobacterium for the fermantation milk products. Thus, various biological materials were tested for the growth enhancing effects of Bifidobacterium in a synthetic medium. The organism used to conduct this study was Bifidobacterium bifidum SKD-2001, originationg from the feces of a breast-fed infant. Lactose, sucrose, peptone, L-cysteine HCI+vitamine K_1, tomato extract, and yeaset extract enhanced the growth of the test organism. The mixture consist of these materials as mentioned previously. This mixtute added in 12% reconstituted skim milk. The total viable counts of the test organism were 4.3 X 10^9/ml at 37℃, 48 hrs incubation anaerobically.

염산 Bleomycin 병변내 주입을 이용한 사마귀 치료

강민정,임연순,최혜영,명기범 梨花女子大學校 醫科大學 醫科學硏究所 1999 EMJ (Ewha medical journal) Vol.22 No.2

연구목적 : 지금까지 난치성을 보이는 사마귀의 치료로 Bleomycin 행변내 주사의 효과가 많은 연구에서 보고된 바 있다. 이에 저자들은 본 치료방법의 효과를 사마귀의 크기, 숫자, 위치 및 유병기간에 따라 판정하여 보다 효과적인 적응 대상을 알아보고자 했다. 방법 : 1995년 3월부터 1998년 2월까지 이화여자대학교 목동병원 피부과에 비성기성 사마귀로 내원한 환자중 다른 치료에 반응하지 않았거나, 재발한 경우, 크기가 0.5㎝ 이상이거나 7개 이상의 다발성 병변 , 혹은 조감 주위 병변을 보인 133명의 환자를 대상으로 Bleomycin 병변내 주사로 치료하였다. 1회 치료후 효과와 치료 종결후 완치율을 병변은 크기, 숫자, 위치, 유병기간에 따라 비교하였다. 결과 : 1) 환자의 연령 분포는 4세에서 45세였고, 남자 59명 여자 74명으로 1:1.24 비율이었다. 2) 첫 주사 치료후 96명의 환자에서 50% 이상의 병변의 수나 크기의 감소를 보였다. 크기별로는 0.5~0.9㎝의 87.5%에서, 병소의 수별로는 단일 병소의 76.9%에서 50% 이상의 병변의 크기나 수의 감소를 보여 가장 좋은 효과를 보였으나 통계적 유의성은 없었다. 또한 조갑주의 병변은 79.1%에서, 수부는 75.8%, 족부는 72.9%에서 50% 이상의 호전을 보였으나 족서부 병변은 53.4%로 가장 낮은 낮은 효과를 보였다. 유행병 기간은 6개월 이하인 31명(86.2%)에서 50% 이상의 효과를 보여 유병기간이 짧을수록 치료효과가 유의하게 증가하였다(p<0.05) 3) 치료 종결시 3개월 이후까지 재발없이 완치된 경우는 총 93명으로 69.9%였고 치료받은 병변의 수가 증가할 수록 완치율이 감소하였다, 부위별로는 조감주위가 77.1%로 가장 높았으며, 병변의 크기에 따른 일괄된 완치율의 차이는 없었다. 병변의 기간에 따른 완치율은 6개월 이하에서 80.6%로 가장 높았으며, 유병기간이 길수록 완치율은 감소하는 양상을 보였다. 4) 부작용은 환자 중 18.4%인 24명의 환자에서 발생하였으며, 유형별로는 3일 이상 지속된 동통과 홍반, 색소 침착 및 감염이 관찰되었으나, 모두 이후 호전되었으며, 1명에서 경한 조갑 능선을 동반한 변형이 관찰되었다. 결론 : 본 연구에서 사마귀에 대한 Bleomycin 병변내 주사효과가 병변의 크기에 따라 뚜렷한 차이를 보이지 않았으며, 심한 부작용이나 전신적인 독작용없이 조감주위병변 및 급성기 병변에서 높은 완치율을 보여 좋은 적응증이 됨을 확인하였다. 아울러 Bleomycin 병변내 주사의 효과 및 안정성에 있어서 시술자가 적당한 양의 약물을 주변부위로 부터 과도한 침습없이 정확히 병변의 기저부에 도달시키는 기술이 또하나의 중요한 변수가 됨을 반영하는 결과라 사료된다. Purpose:This study was to designed to evaluate the efficacy of intralesional injection of bleomycin for common warts and plantar warts according to size, number, location, and duration and to determine the appropriate indication of this treatment for warts. Materials & Methods : The objective patients had warts being refractory to previous treatment or large than 0.5cm in size or 7 or more lesions or periungal lesions. The intralesional injection with bleomycin hydrochloride 1㎎/㎖ had been performed single to six times at 3 week interval until complete resolution. Age of the patients ranged from 4 to 45 years, and male to female ratio was 1 : 1.25(59 : 74). Results : After first treatment of bleomycin intralesional injection, a reduction of 50% or more of the primary wart area was observed in 96(72.2%) of 133 patients. 93(69.9%) of 133 treated patients experienced complete cure after 1 to 7 injections. The efficacy of intralesional bleomycin injection for warts was not closely associated with the size of warts. However the duration and number of warts was inversely correlated with the efficacy of treatment. The highest cure rate was shown in patients with periungal warts(77.1%), and lowest in patients with plantar warts(53.3%). The side effects were observed in 18.4%(24 of 133) including persistent pain(17.3%), pigmentation(3.0%), erythema(1.5%), and mild nail dystrophy(0.8%), but no evidence of systemic toxicity was found. Conclusions : The efficacy of intralesional injection of bleomycin was not significantly related to the size, but closely related to the duration, number and site of the lesion. These results partly suggest that there is some important factors affecting the efficacy of treatment of bleomycin such as duration of the lesion and skillful injection of the agent into the wart tissue.

김치로부터 분리한 Pediococcus halophilus에 의한 α-Glucosidase의 생산

강국희,민해기,홍승표 成均館大學校 科學技術硏究所 1992 論文集 Vol.42 No.2

Six strains able to efficiently produce α-glucosidase were isolated from kimchi by enrichment culture in APT medium. Among them, Strain No.2 was found to have levels of α-glucosidase activity. The morphological, physiological and biochemical characteristics of the strain No.2 were studied according to the methods of Bergey's manual. Based on the results obtained in these experiments, Stain No.2 was identified to be a similar species to Pediococcus halophilus. The optima conditions for α-glucosidase production were cultured 0.5% starch, 0.4% yeast extract, 0.4% trypticase peptone, initial pH 7.5 at 37℃ and 24 hours cultivation.

철결핍성빈혈 진단과 RDW, MCV

민해연,강연주,조경진,남영미 THE KOREAN SOCIETY FOR BIOMEDICAL LABORATORY SCINE 1995 Journal of biomedical laboratory sciences Vol.1 No.1

자동혈구계산기에서 산출되는 RDW나 MCV가 철결핍성빈혈의 구분진단에 어떠한 도움이 되는지를 보기 위하여 어는 대학병원의 최근 5년 동안의 의무기록과 건강진단결과를 이용하여 227명의 빈혈환자와 143명의 건강인을 선정하고 그들의 혈액검사 결과를 비교분석해 보았다. 분석결과 빈혈환자로서는 철결핍성빈혈과 재생불량성빈혈 환자가 많았으며, 그 외에 만성질환과 관련된 빈혈환자도 많은 것으로 나타났다. 정상인 들에 비하여 빈혈환자에서 RDW는 높게, 그리고 MCV는 낮게 나타났는데 특히 철겹핍성빈혈에서는 다른 빈혈에 비하여 19.3±4.8로 현저하게 높게 나타난 반면, MCV는 62.9±13.7fl로 현저하게 낮게 나타났으며, 그 빈혈의 정도에 따라 그 변화가 크게 나타났다. 빈혈관련수들을 이용하여 D.F.=0.26-0.012MCV-0.130MCH+0.073MCHC+0.052RDW+0.003PLT와 같은 판별함수가 도출되었고, 이를 토대로 철결핍성빈혈과 다른 빈혈을 구분하는데 있어서는 MCV, MCH, MCHC, RDW등이 판별력이 있다는 것을 확인 할수 있었다. RDW and MCV are thought to be the highly sensitive blood cell parameters in the differentiation of iron deficiency anemias. Through the medical records of 227 anemic patients and the physical checking results of 143 healthy persons in a General Hospital during the recent five years, the authors evaluated various blood cell parameters including RDW and MCV. Iron deficiency anemia, aplastic anemia and other anemias associated with chronic discase were shown as the three major causes of anemias in Korea. In the patients of iron deficiency anemia MCV was very low(62.9±13.7fL), while RDW was very high(19.3±4.8) showing much lower MCV and much higher RDW in severe IDA compared with in mild IDA. To differentiate iron deficiency anemias form other anemias, a discriminant function was developed from some blood cell parameters like MCV, MCH, MCHC, RDW and platelets(D.F.=0.26 -0.012MCV -0.130MCH+ 0.073MCHC +0.052RDW +0.003PLT).

Bifidobacterium longum KCTC 3215의 β-Galactosidase 유전자의 Cloning 및 대장균에의 발현

민해기,강국희,성문희 成均館大學校 科學技術硏究所 1992 論文集 Vol.43 No.2

The β-D-galactosidase(β-gal) gene from Bifidobacterium longum KCTC 3215 was cloned to isolate and characterize it for potential use as a selection marker in food-grade cloning vector. Chromosomal DNA from Bif. longum KCTC 3215 was cleaved with the restriction enzyme Sau3AI and ligated to pBR 322 for transformation into E. coli JM109. A β-galactosidase positive clone was detected by its blue color on a medium supplemented with 5-bromo-4-chloro-3-indolyl-β-D-galactoside. This transformant possessed a single plasmid, designated pSK 100, which contained, in addition to the vector DNA, a 5.2 Kilobase(Kb) Sau3A1 insertion fragment coding for β-gal activity. An extract from JM 109(pSK100) contained a β-gal protein with the same electrophoretic mobility as the β-gal from Bif. longum KCTC 3215. A restriction enzyme map of pSK 100 was consisted of PvuII, HincII, PstI,AccI, EcoRI, etc.