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PVA 섬유의 열처리에 따른 PVA/시멘트 복합재료의 계면접착 제어
장해진,김동은,육연수,윤현도,이승구,Jang, Hae-Jin,Kim, Dong-Eun,Yook, Yeon-Sue,Yoon, Hyun-Do,Lee, Seung-Goo 한국섬유공학회 2010 한국섬유공학회지 Vol.47 No.2
PVA fiber has been used as a cement reinforcement because of its good mechanical properties and outstand-ing chemical resistance. However, excessively high interfacial adhesion between PVA fiber and cement matrix induced the fast fiber failure by stress localization at the interface. In the study, thus, we tried to modify the surface of PVA fiber by heat treatment in order to decrease the interfacial adhesion strength. Heat treatment temperature and time were varied to obtain the optimum condition for the modification. To exemine the fiber surface and interfacial conditions, various analyses were carried out including SEM, TGA, ATR, XPS, tensile properties and contact angle measurement. The interfacial shear strength between fiber and cement matrix was measured by a fiber pull-out test. The results showed that the wettability of the PVA fiber was lowered and interfacial strength was decreased by heat treatment, because OH groups of the PVA fiber were reduced.
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주정과 구연산 및 식이성 칼슘소재를 처리한 멸치분말이 흰쥐의 칼슘대사에 미치는 영향
장해진(Hae-Jin Jang),정은봉(Eun-Bong Jung),성기승(Ki-Seung Seong),한찬규(Chan-Kyu Han),조진호(Jin-Ho Jo) 한국식품영양과학회 2006 한국식품영양과학회지 Vol.35 No.7
본 연구는 주정과 구연산을 처리한 대멸분말과 함께 식이성 칼슘소재가 SD계 흰쥐의 칼슘대사에 미치는 영향을 조사하기 위하여 수행되었다. 실험식이는 대멸분말의 칼슘함량을 고려하여 식이중의 칼슘함량이 0.1%가 되도록 semipurified diet(AIN-diet, 1977)에 건조대멸분말을 첨가한 대조군(C), 주정-구연산처리군(EC), 주정-구연산+CPPs처리군(ECC), 젖산칼슘첨가군(CL) 및 인산칼슘첨가군(CP)으로 처리하여 5주동안 실험한 결과는 다음과 같다. 증체량은 EC군이 ECC군과 일반적인 칼슘소재로 이용되는 젖산칼슘군 (CL)과 인산칼슘군(CP)에 비해 유의하게 높았고(p<0.05), 식이효율(FER)은 차이가 없었다. 생체내외(in vitro & invivo) 칼슘흡수율은 CPP를 처리한 ECC군이 각각 20.4%, 28.4%로 실험군중 가장 높았다(p<0.05). 혈당치는 CL군(105.7 mg/dL)이 대조군(89.5 mg/dL)보다 유의하게 높았고 (p<0.05), TC농도는 EC군(75.1 mg/dL)이 CP군(65.6 mg/dL)보다 높았으며, TG농도는 CP군(33.5 mg/dL)이 통계적으로 가장 낮았다(p<0.05). ALP활성과 OST농도는 실험군간 차이가 없이 CL군이 대조군보다 다소 높았다. 혈중 Ca농도는 칼슘흡수율이 가장 낮은 대조군(C)이 10.82 mg/dL로 유의하게 낮았고, EC군과 ECC군이 가장 높았다(p<0.05). 대퇴골무게는 CP군이 가장 낮았고(p<0.05), 길이는 ECC군이 가장 길었다(p<0.05). 골밀도는 CP군(0.1116 g/㎠)이 가장 낮았던 반면, ECC군(0.1149 g/㎠)이 가장 높았다. 이상의 결과에서 CPPs를 첨가한 ECC군이 생체내외 칼슘흡수율과 혈중 Ca농도 및 대퇴골의 길이와 밀도 등에 유의한 상승효과를 미친 것으로 나타났다. 향후 본 연구결과는 칼슘흡수율을 높이고 색택의 개선 및 관능이 향상된 기능성제품 개발의 기초자료로 활용될 수 있을 것으로 사료된다. This study was performed to investigate the effect of ethanol and citric acid?treated anchovy, caseino- phosphopeptides (CPPs), calcium lactate, and calcium phosphate as dietary calcium supplements on calcium metabolism in rats for 5 weeks. Experimental animals were randomly assigned to five treatments with 15 heads of SD male rats (mean body wt. of 100 g) in each group. The experimental diets were as follows; dried large anchovy powder (C) as control, ethanol+citric acid group (EC), ethanol+citric acid+CPPs group (ECC), calcium lactate group (CL) and calcium phosphate group (CP), which were formulated with commercial semi? purified Chow diet, while maintaining the same level of calcium in all diets (1%) groups. The weight gain of EC group was significantly higher than ECC, CL and CP groups (p<0.05), food efficiency (FER) was not different. In vitro and in vivo calcium absorption rates of ECC group treated with citric acid and CPPs were 20.4 and 28.4%, respectively, and the highest among the experimental groups (p<0.05). The blood glucose levels of CL group (105.7 mg/dL) was significantly higher than control group (98.5 mg/dL). In terms of serum lipids, total-cholesterol concentration of EC group (75.1 mg/dL) was significantly higher than CP group (65.6 mg/dL) and triglyceride concentration of CP group (33.5 mg/dL) was the lowest (p<0.05). ALP activity and OST level were not different among experimental groups. The serum calcium concentration of control group (C) was the lowest among groups (p<0.05). The femur weight of CP group was the lowest (p<0.05) and the femur length of ECC group is the longest (p<0.05). The bone density of CP group (0.1116 g/㎠) was the lowest while ECC group (0.1149 g/㎠) was the highest, and the bone density was increased by added CPPs. These data demonstrated that ECC group significantly increased in vitro and in vivo calcium absorption rate, serum Ca level, and the length and bone density of femur.
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자건대멸의 색택, 어취 및 in vitro 칼슘 흡수율에 미치는 주정과 유기산 처리의 효과
조진호(Jin-Ho Jo),장해진(Hae-Jin Jang),조승목(Seung-Mock Cho),이양봉(Yang-Bong Lee) 한국식품영양과학회 2005 한국식품영양과학회지 Vol.34 No.9
자건대멸분말의 색택 개선을 위한 주정 처리의 최적화를 ΔE값을 종속변수로 하여 반응표면분석법으로 알아본 결과, 멸치의 건조중량 대비 7배의 주정을 50℃에서 9시간동안 처리하는 것이 최적조건으로 설정되었고, 그 조건에서 제조되어진 자건대멸분말을 soxhlet법과 SPME와 GC로 지방과 TMA를 측정한 결과, 무처리구에 비해 각각 81.1, 77.4% 제거되었다. 자건대멸분말의 TMA에 유기산들을 1% 농도로 실온에서 20분간 처리한 결과, citric acid가 가장 효과가 높았다. 주정과 citric acid를 병행처리한 결과, 90%의 제거율을 보여 가장 좋은 효과를 나타내었다. In vitro 칼슘 흡수율에서는 병행처리구의 칼슘 흡수율이 12.3%로 무처리구 2.9%에 비해 흡수율이 많이 증가하는 것으로 나타났다. The optimization of ethanol treatment was carried out by response surface methodology (RSM) which was expressed through change of ΔE value for improvement of color of dried large anchovy. The optimum condition was shown as treatment with 7 volumes (v/m) of ethanol at 50℃ for 9 hrs. At this condition, the removal rates of trimethylamine (TMA) and fat considered as fishy odor-causing materials were 81.1 and 77.4%, respectively, when analyzed by solid phase microextraction (SPME)/gas chromatography and soxhlet method, respectively. The effect of citric acid on the removal rate of TMA was the highest one among organic acid treatments. The removal rate of TMA was affected greatly by the concentration of organic acid rather than the temperature and time of treatment. 73% of TMA was removed by treatment of 1% of citric acid at 20℃ for 20 min. Specially, above 90% of TMA could be removed by the combination of alcohol and citric acid treatment. In vitro absorption rate of calcium was also increased to 12.3% by the combination of alcohol and citric acid treatment compared with 2.9% of control.
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김선아(Seonah Kim),장해진(Hae-Jin Jang),유영근(Yung-Geun Yoo),추용식(Yong-Shik Chu),박양호(Yang-Ho Park),박준우(Jun-Woo Park) 대한구강악안면외과학회 2007 대한구강악안면외과학회지 Vol.33 No.6
The aim of this study was to evaluate the effect of mouthrinse products containing deep sea water. We used original deep sea water (DSW) and processed deep sea water desalinated by reverse osmosis at one time (DDW-1), by reverse osmosis at two times (DDW-2) and concentrated by reverse osmosis (CDW). We made 2 kinds of mouthrinse products containing CDW and other agents for smell and taste and one product without deep sea water. The negative control was distilled water. In vivo study, the dental plaque index scores and the gingival index scores were reduced after 4 weeks mouthrinsing three times daily with 4 kinds of deep sea water and 3 kinds of mouthrinse products(p<0.05). The pH of dental plaque in 1 minute after mouthrinsing was not higher than 5.5 in all solutions, but the pH in 20 minutes after mouthrinsing was higher than 5.7 in DSW, CDW and 3 kinds of products which had higher mineral contents. In vitro study, the mouthrinse solutions containing the higher mineral contents were also the more effective in reduction of methyl mercaptan which is one of the causes of halitosis. The 2 kinds of products containing deep sea water killed Streptococcus mutans (ATCC 25175) in culture plates in one minute. These results indicate the usability of deep sea water in mouthrinses for oral hygiene management.
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