감자의 熱風乾燥

崔鍾旭,鄭信敎,黃鉉周 경북대학교 산업기술연구소 1987 産業技術硏究誌 Vol.15 No.-

This study was performed to examine the drying characteristics of the potato at various drying conditions. The eqilibrium moisture content was in the range of 0.058-0.207 g/g. The critical moisture content and diffusion coefficient were in the range of 3.151-4.210 g/g, 0.622 × 10 exp (-5)㎝/sec respectively. Comparing with other food stuffs, the activation energy (6.0 ㎉/㏖) of the potato appeared low. The drying curve equation and the drying rate equation were obtained as follows: Y=4.34×e^-0.553t dy/dt= -2.40×e^-0.553t When the initial moisture content of the potato is known, this equation can be used to predict the drying rate of the potato.

21C 신지식인 양성을 위한 EQM 시스템 구축

최병태,이형민,전상봉,서승교,이우언,백종현 대구산업정보대학 2001 논문집 Vol.15 No.-

The aim of this paper is to form and to operate EQM, to say education quality management. In order to achieve the above stated purpose, the paper hypothesizes that there are similarities between enterprises and colleges in quality management. The basic method of the paper is systematic approach, modifies TQM, which is total quality management. The result is that EQM program must form and operate the feedback system for teaching and learning effect, the PSMT(project, self-study, media, team unit style teaching and learning) as a new teaching and learning method, and the digital system as an advanced mechanism, in education quality management.

감의 脫澁處理中 Pectin 含量과 Texture의 變化

崔鍾旭,孫泰華,鄭信敎,李吉雨,姜峻洙 慶北大學校 1989 論文集 Vol.47 No.-

This experiment was made to investigate the changes of the contents of acetaldehyde, alcohol, tannin, and to study the texture changes of persimmon in relation to the contents of pection during the removal of astringency by CO_2. 1. During the removal of astringency of persimmon fruits, the contents of soluble tannin showed the rapid decrease in high concentration of CO_2, but the contents of ethanol and acetaldehyde showed the rapid increase in all treatments. 2. The contents of W.S.P. increased, but H.S.P. decreased in all treatments. 3. All texture paramenters of persimmon fruits except springness and adhesiveness were decreased druing the removal of astringency. 4. The contents of W.S.P. were good correlated with the changes of hardness in all treatments.

切斷菜蔬의 短期貯藏시 包裝條件이 品質에 미치는 影響

崔鍾旭,鄭信敎,金由美 慶北大學校 1991 論文集 Vol.51 No.-

To study the optimum packing conditions of shredded vegetables, we investigated the changes of gas contents and nutritional components of the PK film packed shredded pimentoes (Capsicum annum L.). 1. The contents of CO_2 in LDPE 0.04 ㎜ was more higher than any other treatments. In the relationship of the contents of CO_2 and the storaging days, we obtained the following regression model equation of predicting the CO_2 contents. CO_2(%)=a+bW+cY^2+d log Y+e log X …… (1) CO_2(%)=a+bW+cY^2+d Y+eW^2+fX …… (2) Where. W : Thickness of shredded Pimentoes Y : Day of storage X : Weight of shredded Pimentoes 2. The rate of weight loss was observed just slightly during storage, but the contents of Vitamin C and reducing sugar were reduced sharply after 2 days storage. On the appearance test. the shredded pimentoes packed HDPK 0.02 ㎜ were comparatively better than any other treatments. 3. The Correlation between volume and weight of shredded pimentoes packed PK film were explained as follow; Vs=0.26 × Vm …… (3) X=(1/1.08) × Vs …… (4) Where. Vs : Volume of shredded Pimentoes Vm : Total volume X : Weight of shredded Pimentoes

온도; pH, 염분 내성 및 충격이 개불, Urechis unicinctus 유생에 미치는 영향

최상덕,김호진,라성주,정형택,윤호섭,신종암,이원교 國立 麗水大學校 環境問題硏究所 1999 環境硏究論文集 Vol.2 No.-

The effect of different temperature, salinity and pH on survival rate of Urechis unicinctus's swimming embryo was examined to develop the method for the efficient seed production. In addition to, this study was designed to investigate the possibility of pollutant marker diagnosis of marine pollutions by the change in different temperature, salinity and pH. Treatment was carried out whit different temperature (5˚C, 10˚C, 17˚C, 20˚C, 25˚C,), salinity(0‰, 10‰, 20‰, 30‰, 34‰, 40‰) and pH(4, 6, 7.2, 8.2, 9.2, 10). All the swimming embryo of the temperature experiment was survived within all experiment section, but the others experiment were not. At the temperature-shock and tolerance experiment ranging from 5˚C to 25˚C the survival rate was occurred: 75%, 95%, 100%, 100%, 50%, at the ph-Shock experiment ranging from 4 to 10, the survival rate was occurred: 0%, 50%, 85%, 100%, 60%, 0%, at the pH-tolerance experiment ranging 4 to 10 the survival rate was occurred : 0%, 75% 90%, 100%, 80%, 0%, and at the salinity-shock experiment ranging from 0% to 40% the survival rate was occurred : 0% 10% 90% 95% 100% 0% , at the salinity-tolerance experiment ranging from 0% to 40% , the survival rate was occurred : 0% 0% 90% 100% 100% 0%. These results suggest, that the survival rate of larvae of Urechis unicinctus was the highest at 17˚C, 34%. pH8.2 and this Urechis unicinctus could be live at the zone of euryceious and zone of euryhalines

?茶의 吸濕特性

李周伯,鄭信敎,孫泰華,崔鍾旭 慶北大農學誌編輯委員 1986 慶北大農學誌 Vol.4 No.-

市販 ?茶를 20℃에서 相對濕度를 달리하여 저장하면서 吸濕特性을 조사하였다. ?茶의 吸濕速度는 貯藏相對濕度가 높을수록 컸으며 貯藏時間이 경과함에 따라 점차 감소하였다. ?茶의 等溫吸濕曲?은 전형적인 Sigmoid 형태를 나타내었으며 相對濕度가 일정할 때 저장시간과 흡습속도와의 관계에서 다음과 같은 式을 구할 수 있었다. ln(dw/dt)=nln(t) + ln c B.E.T. 式에 의해 구한 ?茶의 單分子層水分含量은 7.01~7.87%로 나타났다. 貯藏時間과 吸濕速度關係式에서 구한 계산치 수분함량과 실측치수분함량을 비교한 결과 거의 유사한 경향이었다. The sorption characteristics of green tea were investigated at 20℃ with various relative humidities. Particle size showed little effect on the sorption behavior of green tea. At low relative humidities below 57%, the sorption equilibrium were easily attained, but a high relative humidities above 75%, the sorption equilibrium were not reached after 10 days. From the estimation of sorption rate at arbitrary humidities an empirical equation was obtained; Ln(dw/dt)=nLn(t) + Ln c The monolayer moisture contents of green tea obtained by B.E.T. equation were found to be 7.87%(powder) and 7.01%(whole), respectively.

식용 및 약용식물 추출물과 화합물이 흰쥐의 간장조직에서 과산화지질 생성에 미치는 영향

박종철(Jong-Cheol Park),정신교(Shin-Kyo Chung),이종호(Jong-Moon Hur),허종문(Jong-Ho Lee),최명락(Myeong-Rak Choi),송상호(Sang-Ho Song),최종원(Jong-Won Choi) 한국식품영양과학회 1997 한국식품영양과학회지 Vol.26 No.6

31종의 식물추출물과 10종의 화합물들을 대상으로, 흰쥐의 간장조직 중 과산화지질 생성 효과를 시험관내에서 살펴보았다. 추출물 중 달래의 70% 아세톤 추출물은 10^(-2), 10^(-1), 1㎎/ml 농도에서 각각 3%, 17%, 33%, 동일한 농도에서 근대 아세톤 추출물은 27%, 46%, 58%, 갓의 아세톤 추출물은 38%, 49%, 62% 그리고 고추잎의 메타놀 추출물은 30%, 45%, 56% 과산화지질 억제작용을 나타내었다. 10종의 화합물에 대한 과산화지질생성에 미치는 영향으로서, quercetin, quercitrin 및 isorhamnetin은 10^(-6)㎎/ml에서 각각 21%, 4%와 14% 그리고 10^(-2)㎎/ml 농도에서는 각각 45%, 16% 및 28%의 지질과산화 억제작용이 관찰되었다. We have studied the effect of 31 extracts and 10 components from some edible and medicinal plants on the formation of lipid peroxide in the liver homogenate of rat in vitro. The 70% acetone extracts of Allium tuberosum, Beta vulgaris var. cicla and Brassica juncea var. integrifolia, and methanol extract of Capsicum annuum decreased the formation of lipid peroxide by 33%, 58%, 62% and 56% at the concentration of 1㎎/ml, respectively. And these four extracts inhibited the lipid peroxidation at the concentration of 10^(-1)㎎/ml by 17%, 46%, 49% and 45% respectively. Among the component tested, quercetin, quercitrin and isorhamnetin reduced the formation of lipid peroxide by 45%, 15% and 28% respectively at the concentration of 10^(-2)㎎/ml.

서양고추냉이 추출물과 분리한 Kaempferol 배당체들의 브로모벤젠 처리 흰쥐에서 in Vitro 지질과산화억제효과

허종문,이종호,최종원,황기욱,정신교,김문성,박종철,Hur, Jong-Moon,Lee, Jong-Ho,Choi, Jong-Won,Hwang, Gi-WUk,Chung, Shin-Kyo,Kim, Moon-Sung,Park, Jong-Cheol 한국생약학회 1998 생약학회지 Vol.29 No.3

Three flavonoid glycosides have been isolated from the aerial part of Armoracia rusticana P. (Cruciferae) in Korea and identified by means of spectral analysis as $kaempferol-3-O-{\beta}-D-xylofuranoside(l)$, $kaempferol-3-O-{\beta}-D-galactopyranoside(2)$ and $kaempferol-3-O-{\beta}-D-xylofuranosyl(1\rightarrow2)-b{\beta}-D-galactopyranoside(3)$. When 1 mg/ml of the methanol extract from the aerial part of this plant was added, lipid peroxide formation in the bromobenzene-treated rat liver decreased by 64%. Among the components isolated from title plant, compounds 2 and 3 reduced the formation of lipid peroxide by 16% and 39% respectively at the concentration of ${10}^{-1}$ mg/ml.

Rearing Temperature and Density Effects on the Number of Bacterial and Fungal Colonies in Metamorphosed Dybowski’s Frogs (Rana dybowskii)

Jong-Sun Kim,Woo-Jin Choi,Il-Kook Park,Kyo-Soung Koo,Hui-Beom Kang,Oh-Sung Kwon,Seung-Hyeon Lee,Hye-Ji Choi,Jung-Hyun Lee,Jin-Gu Lee,Dae-Sik Park 강원대학교 산림과학연구소 2018 Journal of Forest Science Vol.34 No.1

To know if small changes in rearing water temperature and density affect the number of bacterial and fungal colonies in metamorphosed frogs, Dybowski’s frog tadpoles were reared from Gosner 25-26 stages at either low (1°C low to ambient water temperature), ambient, or high (1°C high) water temperature (each 15 tadpoles in 20 L water) condition and at either low (10 tadpoles/20 L water), medium (20 tadpoles), or high (30 tadpoles) density condition. Immediately after metamorphosis, we sampled bacteria and fungi from skin, liver, and heart of six metamorphosed frogs, randomly selected for each treatment group. After separate incubation of bacteria and fungi on 3M Petrifilm plates, we counted the number of bacterial and fungal colonies appeared on the plates and compared the numbers among the temperature and density treatment groups. For temperature treatment, high-temperature group had fewer bacterial colonies, while low-temperature group had more fungal colonies than the other two groups. For density treatment, low-density group had fewer bacterial colonies than the other two groups, but the number of fungal colonies were not different among the groups. Our results suggest that small increased rearing water temperature and lowered rearing density could potentially reduce pathogens in farming frogs.

Effects of Deforestation Practice on the Distribution and Abundance of Herpetofauna in Mt. Gariwang, South Korea

Choi, Woo-Jin,Park, Il-Kook,Kim, Jong-Sun,Koo, Kyo-Soung,Lee, Jung-Hyun,Park, Chan-Woo,Yang, Hee-Moon,Park, Dae-Sik Institute of Forest Science 2018 Journal of forest and environmental science Vol.34 No.2

To know if deforestation practice affects the distribution and abundance of herpetofauna in Mt. Gariwang, South Korea, we conducted field surveys over 12 times both at deforested (n=9 sites) and un-touched (control, n=12 sites) forest areas from March to October, 2017. Each survey site was approximately $100m\;long{\times}20m$ wide area, which in the middle of the site, mountain road presented. During each survey, we recorded the species and the number of amphibians and reptiles which identified. To compare environments between the two areas, we analyzed eight environmental variables, extracted from digital sources. Overall, we found one amphibian and four reptile species at deforested area, while each five amphibian and reptile species at un-touched area. The number of amphibian species significantly tended to be smaller at deforested area. The number of the survey sites where amphibians found and the number of amphibian individuals showed the same trend. For reptiles, although the number of reptile individuals showed some increases, all variables investigated were not significantly changed by deforestation practice. Our results imply that deforestation practice negatively affects amphibians, but effects of that on reptiles are not evident.