高濕度下에 있어서의 마른김의 成分變化에 關한 硏究

朴榮浩 釜山水産大學校 1973 釜山水産大學 硏究報告 Vol.13 No.1

In the present study, the effect of storage condition, particularly, high humidity to the changes in chemical components of dried lavers was investigated and some characteristic patterns of the changes were discussed. Dried lavers, Porphyra yezoensis Ueda, were stored at 20� under two different levels of humidity, that were 78% and lower than 7% as relative humidity, respectively. And the content of pigments, organic acids, sugars, and fatty acids were analyzed at 10,25 and 45 day intervals during the storage. Total acidity was also determined. Degradation of chlorophyll a was faster than other pigments such as carotenoids and phycobilins under high humidity. For instance, after 45 day storage, more than two-fold of chlorophll a was retained in low humidified sample compared with that in the case of high humidity whereas a remarkable difference in retention rate of carotenoids or phycobilins was not detected. phycobilins showed high stability under the condition of high humidty, particularly, in phycoerythrin than in phycocyanin. Eight kinds of non-volatile organic acid namely pyruvic, lactic, malonic, fumaric, oxalic, malic, succinic, and citric acid were gas chromatographically identified. The stability of theses acids appeared quite differently by storage humidity. The acids like oxalic, malic, and succinic, did not show an outstanding change under low humidity even after 45 day storage while both oxalic and malic acids remarkably decrased under high humidity and succinic acid contrary increased under the same condition. Citric acid, however, decreased under both cases of humidity. The total amount of volatile acid tended to increase throughout the storage under both high and low humidity, but the rate of increase was relatively greater in case of high humidity than that of low humidity. On the other hand, the same tendedcy was observed in change of total acidity in which the value tended to increase under the high humidity while that remained steady under the low humidity. In the free amino acid composition of dried lavers, alanine,glutamic and aspartic acid were dominant in content whereas such amino acids as methionine, cystine, histididine, comparatively low. It is noteworthy that the content of taurine was tremendously high as an amino acid related compound. During the storage, a significant change in the total amino acid level and individual variation was not detected. In another aspect of storage stability of chemical components, glucose remained with negligible change under both storage conditions and galactose increased rapidly under the high humidity while maintained a steady level under the low humidity. On the contrary, the floridoside decreased rapidly under the high humidity whereas slowly under the low. In the tendecy of strorage stability of fatty acid, tended to decrease in the low humidified material. Under high humidity, ?? acid appeared stable while ?? acid considerably increased. The total fatty acid level which was consisted of 14 kinds of fatty acid seemed to increase in high humidified material and to decrease in the low humidified material.

폴리에스터 연속 중합 공정의 전산모사 연구

박융호,강우철 漢陽大學校 工學技術硏究所 1999 工學技術論文集 Vol.8 No.1

Process modeling, though a very useful tool in optimizing chemical processes, is not utilized very much in Korea due to lack of modeling techniques and application experiences. Modeling of the complicated processes haven't been attempted very much due to the difficulties in using the process simulator and the lack of actual experiences in optimization of large processes. In the case of continuous process of PET polymerization, the modeling of the entire process has never been reported due to secret of commercial processes. In this works, a model for PET process has been bullit with a commercial simulator(Aspen Plus) with a detailed consideration of undissolved TPA particles in esterification step and mass transfer of EG in polycondensation step. The model was used in investigating the effect of the changes in the operating conditions of the process on the properties of polymer product and in studying the interaction among the process equipments. And practical techniques for process modeling and optimization have been suggested through the example of PET process modeling.

Ethylene 중합용 Pentamethylene Bridged Dinuclear Zirconocene 합성에 관한 연구

박융호,임선화 漢陽大學校 工學技術硏究所 2001 工學技術論文集 Vol.10 No.-

본 연구는 메탈로센 신촉매 공정 개발을 위하여 진행되었으며, 하나의 촉매에 두 개의 활성점을 갖는 pentamethylene bridged dinuclear zirconocene을 Noh 등의 protocol을 활용하여 합성하였고, 상업화시 가장 중요한 변수인 반응 수율을 향상시키기 위하여 각 합성 단계의 개선을 시도하였다. Biscyclopentadienyl pentane 합성시 silica gel chromatography column을 이용하여 순수한 ligand를 제조하였고, trimethyltin compound 합성시 용매 변환과 TEA 주입을 통하여 수율을 향상시켰다. 최종 메탈레이션 반응시에는 반응 온도의 변화를 통하여 촉매의 활성을 향상시킬 수 있었다. This study was done for the development of a new metallocene catalyst process. The pentamethylene bridged dinuclear zirconocene which have two active sites in one catalyst had been synthesized using Noh et al's protocol and each synthetic step was modified for the improvement of reaction yield which was the most important variable in commercialization. Pure biscyclopentadienylpentane was obtained by passing through silica gel chromatography column and the reaction yield of trimethyltin compound was improved by solvent change and TEA injection. A change in the reaction temperature during the final metallation process also improved the catalytic activity.

명태 肉質의 冷凍變性 防止에 關한 硏究

朴榮浩,姜泳周 釜山水産大學校 1974 釜山水産大學 硏究報告 Vol.14 No.1

冷凍명태 fillet의 冷凍變性 防止에 미치는 各種 添加物處理의 效果를 試驗코져 fillet를 凍結前에 21種類의 處理液에 5分間 浸漬하여 凍結貯藏한 후 解凍하였 을때의 free drip, expressible drip의 發生量 및 drip中의 total solid, nitrogen, DNA의 含量을 定量하여 冷凍變性의 程度를 比較檢討하였다. 1. Free drip는 處理液의 種類 및 濃度에 따라 큰 差를 나타내었으나, expressible drip에 있어서는 그 差가 적었다. 2. Drip량의 減少에 있어 效果가 큰 處理液은 sodium polyphosphate 10%, sodium polyphosphate: sodium pyrophosphate(1:1) 10% 및 5%, sodium chloride 10%, sodium citrate 10%였다. Sodium metaphosphate, glucose, sucrose 및 sorbitol의 處理 效果는 그다지 크지 못하였고, malic acid 處理는 큰 逆效果를 나타내었다. 3. Drip中의 total solid 및 nitrogen은 大체的으로 drip量에 比例하는 結果를 보였으나, malic acid 處理區의 nitrogen量은 drip의 發生量에 비하여 相當히 적은 量을 나타내었다. 4. Drip中의 DNA量에 미치는 前處理의 效果는 drip發生量 및 drip中의 total solid, nitrogen의 경우 보다 현저하였고, 特히 重合燐酸鹽의 效果는 커서 sodium metaphosphate까지도 良好한 結果를 나타내었다. Malic acid 處理區는 drip量은 월등히 많은데도 DNA 含量은 微量에 지나지 않았다. The present study was conducted to evaluate the effect of prefreezing treatment, dipping the fillets into such solutions as condesed phosphate, sugars, and sodium chloride, upon the freezing denaturation of Alaska pollack muscle. The degree of freezing denaturation was estimated by measuring the amount of drip released, contents of total solid, total nitrogen, and DNA in the drip. Fillets were frozen at -27℃- -28℃ and stored for 20 and 40 days at -18℃- -20℃ . The amount of free drip was greatly dependent on treating solution although the expressible drip was not so much variable. Among the treating solutions examined, 10% sodium polyphosphate, 5% and 10% of the mixture of sodium polyphosphate and sodium pyrophosphate (1:1 w/w), 10% sodium chloride, and 10% sodium citrate appeared most effective ones to retard the releasing of drip. The effect of sodium metaphosphate, glucose, sucrose, and sorbitol was not so benefitable. On the contrary, malic acid showed a remarkable reverse effect. As a tendency, total solid, total nitrogen, and DNA in the drip varied proportionally to the amount of drip released. Releasing of DNA, however, was greatly affected by treating solutions comparing with that of total solid and total nitrogen. It was not the case in malic acid treated fillet particularly in DNA content, even though the amount of drip was greater than other cases, DNA content was far less.

에탄올 탈수 PSA 공정의 전산 모사 및 설계 최적화 연구

박융호,최재식 漢陽大學校 工學技術硏究所 1997 工學技術論文集 Vol.6 No.1

A model for scale-up of PSA process of ethanol dehydration was established using bench experimental data. LDF mass-transfer model, Langmuir adsorption isotherm and single-component adsorption were assumed in the model and the coefficients for heat and mass transfer in the beds were fitted against the experimental data. Model equations were solved using a DAE solver (Speed Up). The effects of cycle time, P/F ratio, adsorption pressure, bed length were examined, and the dimension and the operating condition which give optimum peformance for a commercial process were determined.

백일해 백신이 Streptozotocin 유발성 당뇨백서의 당대사에 미치는 영향

박상기,문경래,박춘호,김갑승,박영봉,이병래,양남웅 朝鮮大學校 附設 醫學硏究所 1991 The Medical Journal of Chosun University Vol.16 No.1

Streptozotocin(STZ) may produce a permanent form of insulin-dependent diabetes (IDD) in experimental animals. This STZ-induced diabetes has become an useful model to study the pathogenesis of IDD in man primarily because it approximate clinical findings and also because it lends itself easily to controlled manipulation. The diabetogenic activity of STZ, however, is known to be modified by several agents such as nicotinamide, diazoxide, adrenergic blockers and pertussis vaccine (PV). The present study was undertaken to observe the protective effect of PV or boiled pertussis vaccine(bPV; incubating the PV at 80℃ for 30 minutes) against the development of IDD induced by STZ in young rats, and also the effect of PV on the activities of glycolytic & gluconeogeneic enzymes in both liver and muscle of rat. PV at a dose of 1.2×10^(10) microorganism was administrated intrapntoneally on 3days before & 7days after a single injection of STZ (GO㎎/㎏ body wt). The blood glucose and insulin levels were measured at 1st wk, 2nd wk, 4th wk, 6th wk and 8th wk after STZ injection, and the enzyme activities were exemined at 8th wk. The following results were obtained. 1. No significant difference was noted in blood glucose levels between STZ group and STZ+PV or STZ+bPV groups (P>0.05). 2. Blood insulin levels in STZ group decreased significantly from 2nd wk(P<0.05). Compared with STZ group, blood insulin levels in STZ+PV & STZ+bPV groups were higher, but not a significant value except at 2nd wk in STZ+PV grouP (P<0.05). 3. Compared with STZ group, hepatic glycolytic enzyme activities were significantly increased in STZ+PV or STZ+bPV groups, and muscular glycolytic enzyme activities were significantly increased in STZ+PV or STZ+bPV groups. 4. Compared with STZ group, hepatic gluconeogeneic enzyme activities were significantly increased in STZ+PV or STZ+bPV groups. These results suggest that the PV has somewhat protective effects on blood insulin levels and tissue glycolytic enzyme activities in rats, but it could not reduced blood glucose levels significantly, probably because of excessive increase of hepatic gluconeogeneic enzymes.

Polyester 축중합 공정 회분식 반응기의 전산 모사 및 운전 최적화 연구

박융호,강우철 漢陽大學校 工學技術硏究所 1996 工學技術論文集 Vol.5 No.1

A batch polycondensation reactor for polyester manufacture has been modeled based on plant data using a process simulator (Aspen Plus). Model includes major aspects of polycondensation reactions, side reaction, vapor liquid equilibria, and mass transfer and predicted correctly the dependency of the process performance on the temperature and the pressure of the reaction. Various profiles of the temperature and the pressure were tested for its performance and the profiles which improves significantly the degree of polymerization of the final product were found. The individual and combined effects of the temperature profile and pressure profiles were examined and a way to shorten the batch time using optimized profiles has been discussed.

들깨잎의 품종에 따른 성분분석 및 생리활성물질 탐색

한호석,박정혜,최희진,손준호,김영활,김성,최청 한국식생활문화학회 2004 韓國食生活文化學會誌 Vol.19 No.1

The biochemical components of Namcheondlggae, Miryangdlkkae 25, Boradlggae and Ipdlkkae 1 were measured. The samples were extracted with hot water, 60% acetone or 80% ethanol for screening physiological activity. The crude protein content (4.36%) was found in the Miryangdlkkae 25 and calcium content (497.5 mg%) was found in the Namcheondlggae among the tested 4 perilla leaves. Fructose was 30.86 mg% in the Namcheondlggae and free amino acids at all perilla leaves was detected seventeen. In Boradlggae, glutamic acid and alanin were 25.37 and 11.91 mg%. Totally nine non-volatile organic acids were also detected and the contents of malic acid and glutaric acid were 28.34 and 14.57 mg% in Boradlggae. The Miryangdlkkae 25 had the highest vitamin C amount which was 113.24 mg%. Angiotensin converting enzyme (ACE) inhibition activity of 80% ethanol extract of Boradlggae was 46.71%. Electron donating activity of 60% acetone extract from Namcheondlggae was the strongest inhibition activity as 98.19% when 200ppm level of the sample extracts were added.

寒天의 agarose 및 agaropectin의 組成에 관한 硏究.I. 産地別에 따른 agarose 및 agaropectin 組成의 差異

尹亨殖,朴榮浩 釜山水産大學校 1984 釜山水産大學 硏究報告 Vol.24 No.2

寒天原藻의 産地別에 따른 寒天質의 agarose 및 agaropectin의 組成의 차이와 그것이 寒天의 物性에 미치는 영향을 밝히고자, 1982年 5月에 제주도 우도, 전남 여수, 경남 일광, 경북 울릉도 및 경남 거제 등 5개 지역에서 採取한 우뭇가사리를 試料로 하여 分析, 檢討하였다. 1. 寒天收率에 있어서는 우도産이 33%로 가장 높았고, 여수産이 28%로 가장 낮았다. 2. 寒天質의 agarose와 agaropectin의 組成은 産地에 따라 상당한 차이를 나타내었는데 우도産이 agarose含量이 가장 높았고, 여수産이 가장 낮았다. 3. Agarose와 agaropectin의 組成比가 寒天의 物性에 미치는 영향은 agarose含量이 높을 수록 gel化能과 jelly强度는 높은 값을 나타내었다. 4. 黃酸基 含量은 agarose含量과 逆相關關係를 나타내었는데, 우도産이 1.6%로서 가장 낮은 含量을 보였고, 여수産이 2.4%로서 가장 높은 含量을 나타내었다. The present investigation was carried out for the purpose of making clear the fundamental features of the compositional differences of agarose and agaropectin in agr prepared from Gellidium amansii collected at different places, and its effect of agar. The samples, Gellidium amansii collected in May, 1982, in Udo, Che-ju island, Yeosu, Cheon-Nam, Ilkwang, Kyeong-Nam, Geoje, Kyeong-Nam and Ulreungdo, Kyeong-Buk. In addition, ag-arose and agaropectin in agar were isolated by dimethylsulfoxide. The results obtained are summarized as follows: In collecting places, the maximum yield of agar occurred in Udo, 33%, and the minimum in Yeosu, 28%, The experiment showed that the agarose and agaropectin composition in agar is changed, even if the seaweeds collected from the same place is used as raw material. The agarose content of Gellidium amansii collected in Udo showed highest value, 77.3%, and in Yeosu the lowest value, 66.3%, respectively. Jelly strength, gelation ability of agar tended to increase as the agarose content are rose, butsulfate content has shown a decrease.

褐藻類의 알긴酸含量에 關한 硏究

金章亮,朴榮浩 釜山水産大學校 1975 釜山水産大學 硏究報告 Vol.15 No.1-2

釜山沿岸에서 採取한 지충이, 셀만모자반, 곰피, 미역 및 市販乾製品인 다시마, 곰피, 미역의 알긴酸含量과 藻體部位別에 따른 含量差異를 分析比較하였으며 그結果를 要約하면 다음과 같다. 供試한 試料의 알긴酸含量은 미역, 곰피, 다시마, 셀만모자반, 지충이의 順으로 높았다. 지충이 및 셀만모자반은 알긴酸含量이 적고 蛋白質含量이 높아 良質의 알긴酸原藻라고는 볼수 없었다. 藻體部位別에 따른 알긴酸含量의 差異는 곰피에 있어서는 줄기가 잎보다 若干 많은 傾向이 있었으나 큰 差異는 없었다. 미역에 있어서는 잎과 줄기에는 뚜렷한 含量差異를 볼수 없었고, 미역귀에 있어서는 잎과 줄기에 比하여 알긴酸含量이 적은 傾向을 볼수 있었다. Five species of samples, Ecklonia stolonifera, Sargassum thunbergii, Sargassum Kjellmanianum, Undaria pinnatifida, and Laminaria religiosa were analyzed for their contents of crude protein, crude fiber, total ash, and alginic acid. In addition, the comparative analyses were made on the fronds, stipes and sporophylls of the plant for their chemical composition. The content of alginic acid in the samples exhibited a remarkable difference according to the species, Undaria pinnatifida showed the highest content among the samples examined amounted to 36% and Sargassum thunbergii showed the lowest content amounted to 12% on a dry basis, respectively. No significant difference was observed in alginic acid contents between the stipe and the frond of the plant, but in the case of Undaria pinnatifida, the sporophyll of plant showed considerably lower contents than those of the stipes and the fronds.