솔잎 첨가김치의 관능적 품질

오영애,서기용,김순동 대구효성가톨릭대학교 식품과학연구소 1997 식품과학지 Vol.9 No.-

솔잎물추출물(WEPN)이 김치의 보존성과 품질에 미치는 영향을 조사한 결과는 다음과 같다. WEPN의 첨가가 김치의 품질에 미치는 영향은 WEPN을 1~3%범위로 첨가하여 관능검사를 실시해 본 결과 2%되게 첨가하는 것이 종합적인 맛과 색상면에서 양호하였으며 3%를 첨가한 경우는 색상면에서 좋지 않았다. WEPN을 2% 첨가한 김치의 숙성중 신맛, 아삭아삭한 맛, 김치냄새 및 종합적인 맛을 측정한 결과 신맛은 무첨가 보다 낮았으며, 아삭아삭한 맛은 숙성전반에 걸쳐 무첨가보다 높았다. WEPN의 첨가는 숙성김치에서 발생하는 불쾌취를 줄임으로서 김치의 냄새가 상당히 개선되었으며 숙성초기에는 큰 차이를 보이지 않았으나 숙성이 진행될수록 종합적인 품질이 향상되었다. WEPN의 첨가가 김치의 보존성에 미치는 영향은 WEPN의 첨가김치는 pH 저하가 현저히 둔화되었으며 산도의 측정결과도 pH 측정결과와 일치하였다. 10℃에서 가식기간은 무첨가의 경우 15일, 1%첨가 경우는 17일, 2%첨가 경우는 20일로 첨가농도가 증가에 함에 따라 연장되었다. This study was carried out to improve shelf-life and quality of kimchi through controlled fermentation by using pine needle extract. Sensory tests of odor and overall taste revealed the kimchi containing 2% pine needle extracts was better than control products during fermentation. Especially, crisp taste was higher in pine needle treatment than in control during the entire fermentation periods of kimchi. The decrease in pH and increase in acidity were significantly lower in pine needle-added kimchi than control during the entire fermentation periods, thus increasing the period during which is eatable. The shelf-life of kimchi by using 0, 1, 2, and 3% water extracts of pine needle prolonged approximately 15 days, 18 days, 20~21 days and 25~26 days, respectively. The decrease in sour taste of kimchi after 15th days of fermentation showed higher in high concentration of pine needle.

암환자의 삶의 질과 건강증진행위 및 가족지지와의 관계

오기원 가톨릭대학교 가톨릭대학교 간호대학 호스피스 교육연구소 1998 호스피스논집 Vol.3 No.-

This study was designed to identify the relationship between Quality of Life, Health Promotion Behavior and Family Support of cancer patients to provide the basic data of effective cancer patients' nursing interventions. The subjects for this study were 129 patients receiving chemotherapy at Samsung Medical Center and Saint Mary's Hospital. Data were collected from May 19 to July 31, 1998 through interviews by questionnaires. The results of this study were summarized as follows : 1) The quality of life of cancer patients had a significant and positive correlation with health promotion behavior, and a negative correlation with pain. The quality of life of cancer patients turned out to be higher in case of no recurrence, no pain and the lower level of physical discomfort. 2) The health promotion behavior was significantly correlated with family support and the period of post-recurrence. 3) The family support was higher in the group whose period of post -diagnosis was below 11 months than 2-5 years. In conclusion, the quality of life in cancer patients was significant correlation with health promotion behavior. The health promotion behavior was significantly correlated with family support and the period of post-recurrence.

불소의 농도와 Seed Material이 Crystal Growth에 미치는 영향

오승연,정일영,금기연,이찬영 大韓齒科保存學會 1997 Restorative Dentistry & Endodontics Vol.22 No.2

The present study was undertaken to investigate the crystal growth onto human enamel mineral and synthetic hydroxyapatite(HA) seeds in media resembling the enamel fluid composition. Effects of fluoride at high concentrations on the precipitation were also examined in a bench-top crystal growth model adopting a miniaturized reaction column. The Ca, P and F concentrations and pH values of the inlet and outlet solutions were determined. The recovered solid samples were weighed to assess the amount of minerals precipitated during the experimental period, and finally viewed under a scanning electron microscope. Remarkable findings were that 1) both biological and synthetic seeds with the same total surface areas yielded similar amounts of crystal growth, 2) the amount of crystal growth was accelerated in a manner depending of fluoride concentrations in the media, 3) SEM observations disclosed that without the addition of fluoride, precipitation of thin, plate-like OCP crystals became prominent, but by increasing the fluoride concentration(beyond 1ppm F), rod-like crystals having a pointed edge were most frequently observed, without and evidence for precipitation of the plate-like crystals. Furthermore, the dimension of rod-like crystals was increased in proportion of fluoride concentrations, 4) there was no difference in the morphological feature of precipitated mineral phase upon seeding between human enamel seed and synthetic HA seed. The overall results support the view that the seeded crystal growth model is of value to gain insight into the mechanism of enamel crystal growth under fluoride regimens.

한국 자생란에서 난 균근균의 분리와 유묘난에 접종

오창호,이태수,이상선,백기엽 충북대학교 한국과학재단 지정 첨단원예기술개발 연구센터 1998 연구보고서 Vol.3 No.-

한국의 춘란 자생지의 춘란(Cymbidium goeringii) 뿌리에서 공생하는 10개의 균근균을 분리하였다. 분리된 난 균근균을 PDA에서 배양한 결과 균총은 다양한 색깔을 나타내었으며, 생장 속도도 달랐다. 분리된 난 균근균을 현미경으로 관찰한 결과 Rhizoctonia repens 또는 R. endophytica var endophytica로 동정되었다. R. repens는 자생란인 춘란의 뿌리에서 많이 분리되었으며, R. endophytica var endophytica는 상업적으로 재배되는 외국산의 난 뿌리에서 분리되었다. 분리된 균들 중에 R. repens와 유사한 5개의 분리균을 oatmeal agar에 접종하고 배양한 후 여러종의 난 유묘를 이식하여 난의 생장을 관찰하였다. 그 결과 난의 생장은 분리 균에 따라서 다양하였으나 대부분의 난은 생장촉진 반응을 나타내서, 분리균과 각각의 난과의 공생 관계를 관찰할 수 있었다. Ten isolates of the orchid mycorrhizal fungi were isolated from the roots of Korean native orchid plants (cymbidium goeringii) which inhabitate mainly in southern and western areas of Korea. The growth rates and color of the isolates in potato dextrose agar (PDA) were various. Microscopic observations of the hyphae isolated were identified as Rhizoctonia repens and R. endophytica var endophytica or their related species. R. repens was isolated from the roots of the Korean native orchids, but R. endophytica var endophytica was only isolated from the roots of the commercial orchids introduced from foreign countries. Also, the polymorphic patterns of genomic DNA extracted from selected isolates were compared with those of DNA extracted from the orchid mycorrhizal fungi isolated previously and similar band patterns were observed among those isolates. Five isolates of R. repens were selected and cultured at the oatmeal agar for investigating their symbiosis with orchid plants. The symbiotic specificity between orchid plants and isolated orchid mycorrhizal fungi was observed by growing orchids about six months in the greenhouse. The symbiotic responses of the commercial orchid plants with selected isolates were quite different from different isolates due to the genetic variations.

MnO₂를 촉매로 사용한 SnO₂계 CO센서의 특성

오태영,한상도,이상호,명광식,박기배 경북대학교 센서기술연구소 1998 센서技術學術大會論文集 Vol.9 No.1

CO sensors were fabricated with SnO_(2) thick-films using MnO_(2) or V_(2)O_(5) catalysts. The SnO_(2) thick-films doped with MnO_(2) or V_(2)O_(5) showed better selectivities to CH_(4), NO_(x) than the pure SnO_(2) film material in air at operating temperature of 450°C, 500°C respectively. In addition, MS2-2[(3wt%)MnO_(2)+SnO_(2)] showed better selectivity than SVS[(3wt%)V_(2)O_(5)+Pd+SnO_(2)]. MS2-3[(6wt%)MnO_(2)+SnO_(2)] showed the highest selectivity for 420ppm-NO_(x), 3500ppm-CH_(4) at 450°C

國産스테인레스鋼線系 矯正用線材의 開發과 物理的 性質에 關한 硏究

권오원,성재현,이기대,경희문 대한치과교정학회 1989 대한치과교정학회지 Vol.19 No.2

The physical properties of seven sizes of control groups and experimental group in stainless steel orthodontic wires were studied in tension, hardness, bending, torsion and observation of microstructure. The wires (0.40 - 0.90mm dia.) of round type were tested in the as-received condition. The wires of control groups were TRU-CHROME and REMANIUM, and experimental group was SK wire which was developed by ourselves and made in Korea. The results were as follows: 1. The chemical compositions of control groups and experimental group were austentie stainless steel wires of SOS 304. 2. Higher values of tensile and yield strength in tension were control group I, experimental group, control group II. Maximum tensile and yield strength of experimental group were 203.63 ±1.41kg/mm²in 0.70mm diameter and 148.96 ± 4.88kg/mm² in 0.60mm diameter, and maximum elongation was 5.20 ± 0.57% in 0.45mm diameter. 3. Hardness values of experimental group were similar to control groups. Maximum hardness values were 596.2 ± 13.66 Hv in 0.45mm diameter wire of control group I, 590.5 ± 20.08Hv in 0.50 mm diameter wire of control group II, and 563.6 ± 5.35 Hv in 0.70mm diameter wire of experimental group. 4. Torsion properties of experimental group were similar to control group I and more than control group II. Maximum torsion cycles were 31.8 ± 2.48 in 0.45mm diameter of control group I,17.4 ± 4.84 in 0.60mm diameter of control group II, and 24.6 ± 3.04 in 0.45mm diameter of experimental group. 5. Maximum bending cycles of experimental group were smaller than control groups. Maximum bending cycles were 9.00 ± 0.00 in 0.50mm diameter wire of control group I, 10.0 ± 0.82 in 0.40mm diameter wire of control group II, and 8.0 ± 1.26 in 0.50 mm diameter wire of experimental group. 6. Microstructures of experimental and control groups co-existed with martensited austenite structure and elongated austenite structure. 7. The direction of wire fracture was propagated parallel to torsion direction typically and there was no probability showing wire fracture at inclusions and surface scratches. 8. The type of wire fracture was brittle fracture at initiation site and ductile fracture at core.

수정체의 노화에 따른 단백성분의 산화 : 수정체의 Nucleoschlerosis에 따른 변화

최기오,정영도,양성렬,황태익,안봉한,이민화 한국노화학회 1991 한국노화학회지 Vol.1 No.1

Ni-Ti矯正用線材의 超彈性에 관한 硏究

權五源,徐惠敬,李基大 慶北大學校 齒科大學 1987 慶北齒大論文集 Vol.4 No.1

According to the development of the techniques for tooth movement, the research on the orthodontic wires has advanced and the Ni-Ti wire is highlighted these days. The Superelasticity of Ni-Ti wires was studied in tension. The wires were tested by universal testing machine. The elastic modulus was 20×10 exp (3)kg/㎟ in Cr-Ni wires, 21∼25×10(3)kg/㎟ in Co-Cr wires and 5∼6×10 exp (3)kg/㎟ in Ni-Ti wires. The elastic modulus of Ni-Ti wires was opproximately 1/4 of Cr-Ni wires and Co-Cr wires, and the elastic limit of Ni-Ti wires was approximately 4 times of Cr-Ni wires and Co-Cr wires. The permanent strain was approximately 0.5% in stress-strain curve of Ni-Ti wires.

齒科嬌正用線材의 物理的 性質에 미치는 熱處理의 影響

李基大,權五源,成材鉉 慶北大學校 齒科大學 1985 慶北齒大論文集 Vol.2 No.1

The physical properties of .016" orthodontic wires by heat treatment were studied in tension, bending, hardness and microstructures. The wires were tested in the as-manufactured and heat-treated conditions. The results were as follows: Ultimate tensile strength and yield strength were slightly increased by heat treatment, but Elgiloy was the most effective by geat treatment. The strength of Elgiloy showed the highest value after heat treatment above 6 minutes at 500, 600℃. Also, bending fluxure modulus of elasticity were progressively increased by heat treatment. the hardness number of Australian of as-manufactured wires showed the highest value, and Elgiloy showed the highest value by heat treatment. Microstructure of as-manufactured wires showed fibrous interlocking grains, and a coarse grains after heat treatment and an austenite structure after solution heat treatment.

Al-8Ti-1B 합금의 응력부식에 관한 연구

김기주,오택열,박경석,백영남 慶熙大學校 材料科學技術硏究所 1994 材料科學技術硏究論集 Vol.7 No.-

The Mechanical Alloying(MA) process with high mechanical properties of dispersion strengthened MA Al-Ti-B alloys were invested in order to evaluate their Stress Corrosion Cracking(SCC) applications. The experimental apparatus of SCC test was slow strain rate test facility. Al-Ti-B alloys had better SCC susceptibility in pH=2.01 or pH=13.2 solution than pH=6.81 solution. In this study Al-Ti-B alloys by MA had more SCC resistance than Al-Ti alloys Al 7075-T73 alloys. But, in addition of B to Al-Ti alloys had the characteristics of brittle, in binary Al-Ti alloys was ductile.