• 생물환경조절학회지
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• 제5권1호
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• pp.23-33
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• 1996

시설하우스에 이용되는 시설자재의 규격화와 품질개선을 유도하기 위하여 피복자재의 종류별, 두께별로 물리적 기계적 특성을 시험 분석하였다. 피복재의 물리적 기계적 특성은 충격강도, 인장 인열강도 및 파장별 투과율을 측정하였으며, 시험한 결과를 요약하면 다음과 같다. 1. 다트식 낙추시험에서 연질필름의 충격 강도는 피복재가 두꺼울수록 파괴하중이 증가하여 50% 파괴수준의 하중이 158-213g 범위에 있었으며, LDPE 필름이 대체로 높게 나타났다. 2. 충격파괴정도를 보면 전혀 파괴되지 않는 최대 충격하중이 62-192g 범위였으며, 0.05mm에 비해 0.1mm 두께의 필름이 충격에 견디는 힘이 1.8-3.2배 더 강한 것으로 나타났다. 3. 인장하중은 0.95-2.22kg 범위로 피복재 길이 방향이 높고, LDPE 필름이 높게 나타났으며, 신장율은 345-1020% 범위로 길이보다 폭방향이 1.4-2.7배 더 신장되는 것으로 나타났다. 4. 인열강도는 80.S-121.7kg/cm의 범위로 LDPE 필름이 높고 EVA가 낮은 것으로 나타났으며, 길이방향보다 폭방향이 더 큰 값으로 나타났다. 5. 연질필름의 종류별 광투과특성은 자외선 영역에서 87-92%로 큰 차이가 나타나지 않았으나 가시광선 영역에서 높은 투광율을 나타내었다.

• 한국어병학회지
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• 제25권2호
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• pp.95-101
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• 2012

설파디메톡신(sulfadimethoxine, SDM)을 넙치(평균 체중 $100{\pm}20$ g, $20{\pm}1.0^{\circ}C$)에 대하여 400 mg/kg의 농도로 1회 경구 투여한 다음, 혈장과 간에서 시간 경과에 따른 잔류량을 HPLC로써 분석하였다. SDM을 넙치의 조직에 2~50 ppm의 농도가 되도록 첨가한 결과, 평균 회수율은 혈장에서 92.24~93.62%, 간에서 88.34~91.90%의 범위로 나타났으며, 이 분석법의 검출한계는 0.05 ppm이었다. SDM은 투여한 후, 1시간 째에 혈액($402.64{\pm}59.66{\mu}g/ml$)과 간($238.18{\pm}54.00{\mu}g/ml$)에서 모두 최고농도로 분포하였다. 이후 SDM은 빠른 속도로 배설되었으며, 480시간째는 혈장과 간에서 검출되지 않았다.

• 한국식품위생안전성학회지
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• 제26권1호
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• pp.70-75
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• 2011

본 연구에서는 새로운 제형 클로렐라제품의 정확한 총 엽록소 정량시험법을 마련하기 위해 새로운 제형 중 Syrup과 Candy 두 가지 제형의 제품을 마련하여 현행 공전방법을 적용한 함량 비교시험을 하였고 보다 정확한 결과 값을 나타낸 제1법인 pyridine 추출법의 전 처리방법을 개선하기 위하여 alkari성 pyridine으로 시료에서 엽록소를 추출하기 위하여 30분간 방치하고, 15분간 가온 할 때 초음파 처리를 병행하는 방법을 개발하여 그 결과 값의 정확성, 정밀성을 검토하였고 또 matrix sparking에 의한 정밀성과 재현성을 검토하였다. 그 결과 액상제품의 경우 pyridin 추출법과 acetone 추출법의 결과 값 CV는 18.82와 40.00, 이론치에 대한 결과 값이 106.3%와 78.1%로 상당한 차이를 보였다. Pyridin 추출법과 pyridin 추출법에 초음파 전 처리를 추가한 결과는 $27.2{\pm}5.12\;mg$/100 g와 $25.0{\pm}2.84\;mg$/100 g로 표준편차가 상당히 줄어들었고 CV도 18.82에서 11.36으로 상당히 줄어들었다. 이론치 대비율도 106.3%와 97.7%로 pyridin-초음파 추출방법이 보다 이론치에 근접한 것으로 나타났으며 회수율 측정을 하기 위하여 pyridin-초음파 추출법에 matrix spiking 한 결과도 표준편차, CV값과 이론치 대비율이 모두 향상된 결과를 나타내었다. 고형제품의 경우도 pyridin 추출법과 acetone 추출법의 결과 값 CV는 7.05와 30.00, 이론치에 대한 결과 값이 62.7%와 40%로 상당한 차이를 보였다. Pyridin 추출법과 pyridin 추출법에 초음파 전처리를 추가한 결과는 $62.7{\pm}4.42\;mg$/100 g와 $99.4{\pm}4.06\;mg$/100 g로 표준편차가 상당히 줄어들었고 CV값도 7.05에서 4.08로 상당히 줄어들었다. 이론치 대비율도 62.7%에서 99.4%로 pyridin-초음파 추출법이 명확하게 이론치에 근접한 것으로 나타났으며 회수율 측정을 하기 위하여 pyridin-초음파 추출법에 matrix spiking 한 결과도 표준편차, CV값과 이론치 대비율 모두 향상된 결괴를 나타내었다.

• Nutrition Research and Practice
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• 제2권2호
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• pp.62-67
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• 2008

The present study was carried out to evaluate the physiological effects of seaweed supplementation on blood glucose levels, lipid profile, and antioxidant enzyme activities in subjects with type 2 diabetes mellitus. Subjects were randomized into either a control group or a seaweed supplementation group. Pills with equal parts of dry powdered sea tangle and sea mustard were provided to the seaweed supplementation group three times a day for 4 weeks. Total daily consumption of seaweed was 48 g. We found that total dietary fiber intake was 2.5 times higher in subjects receiving seaweed supplementation than in the control group. Accordingly, fasting blood glucose levels (p<0.01) and 2-hour postprandial blood glucose measurements (p<0.05) were decreased significantly in those ingesting seaweed. Furthermore, the serum concentrations of triglycerides were decreased and high-density lipoprotein cholesterol was increased significantly in seaweed supplement group (p<0.05). However, the concentrations of total cholesterol and low-density lipoprotein cholesterol were not affected by seaweed supplementation. The level of thiobarbituric acid reactive substances in erythrocytes was significantly lower with seaweed supplementation compared to controls (p<0.05). Catalase and glutathione peroxidase activities with seaweed supplementation were higher than the controls (p<0.05), but superoxide dismutase activity was not affected. We, therefore, conclude that ingestion of seaweed influences glycemic control, lowers blood lipids, and increases antioxidant enzyme activities.

• 대한치과보철학회지
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• 제29권3호
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• pp.33-41
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• 1991

Cermic has been widely used because of its excellent esthetics and strength. The recently introduced castable ceramic system is regarded as the more esthetic and biocompatible restorative material. The purpose of this study was to compare the shear bond strength of Dicer & G-Cera porcelain laminate veneer according to the type of cement and surface treatment and to observe the surface of bonding failure with SEM. Total forty disks(3.5mm $diam.\times2.0mm$ thickness) were prepared. Forty extracted human maxillary central incisor teeth were stored in saline solution. Ten teeth were bonded to Dicer specimen with Dicer ZPC cement and ten teeth were bonded with Dicer resin cement. Ten silicoated G-Cera specimen and ten non-silicoated G-Cera specimen were bonded to teeth with G-Cera resin cement. Bonded units were mounted in a plastic tube with hard stone and stored in a humidor at $37^{\circ}C$ for 24 hours. Shear bond strength was measured by Instron Universal Testing Machine (Model 1125) and all the specimen were observed with SEM(JEOL, JSM-T2000)and modes of failure were recorded. The obtained results were as follows: 1. The mean shear bond strength of Dicer bonded with Dicer resin cement was 11.62 MPa and that bonded with Dicor ZPC cement was 0.88 MPa : Shear bond strength of Dicer bonded with Dicer resin cement was significantly increased(P<0.05). 2. The mean shear bond strength of silicoated G-Cera was 13.10 MPa and that of non silicoated G-Cera was 10.93 MPa : Shear bond strength of silicoated G-Cera was not significantly increased (P>0.05). 3. Shear bond strength of Dicer and G-Cera porcelain laminate veneer was not significantly different (P>0.05). 4. In observation of bond failure with SEM, Dicer bonded with Dicer ZPC cement exhibited adhesive failure. Dicer bonded with Dicer resin cement and silicoated and non silicoated G-Cera exhibited cohesive failure.

• Journal of Nutrition and Health
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• 제26권8호
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• pp.974-981
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• 1993

The longitudinal changes on contents of calcium, phosphorous and magnesium of breast milk of 23 Korean lacto-ovo-vegetarians(primiparae=11, multiparae=12) at 0.5, 1, 2 and 3 months postpartum have been studied. The mean ash content of breast milk per 100ml was 0.21g in total lactating women(n=23), and it decreased significantly during lactation(p<0.05). The mean calcium, phosphorous and magnesium contents of breast milk per 100ml were 26.83mg, 14.01mg and 2.72mg, respectively. Body calcium and phosphorous contents decreased significantly during lactation(p<0.05), but magnesium content tended to increase during lactation. There were no significant differences in ash, calcium, phosphorous and magnesium contents between primiparae and multiparae. The ratio of calcium to phosphorus was about 1.95:1 in breast milk and 0.62 : 1 in maternal dietary intake. In calcium and phosphorous, no correlation was found between maternal dietary intake and the concentration in breast milk. This study suggests that the contents of calcium, phosphorous and magnesium in lacto-ovo-vegetarian breast milk are not different from the concentrations of those in non-vegetarian.

• Asian-Australasian Journal of Animal Sciences
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• 제8권5호
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• pp.443-447
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• 1995

Fifteen Karan-Swiss male calves of 9-12 months of age were divided into three groups of five each in a randomised block design. Animals in group I were fed wheat straw ad lib. and concentrate mixture according to their requirements, while in group II and III the animals were fed with 1/3 of the required concentrate mixture replaced by UMM licks 'Ex' and 'F', respectively. The DMI (kg/day as well as per 100 kg b.wt.) were similar (p > 0.05) among different groups of animals, however, the digestibility of DM as well as OM enhanced from $52.85{\pm}1.48$ to $58.36{\pm}1.89$ and $55.33{\pm}1.48$ to $60.12{\pm}1.75$, respectively. Growth rates of the calves were $533.8{\pm}27.25$, $532.3{\pm}42.24$ and $538.4{\pm}18.68$ g/d in groups I, II and ill (p > 0.05), respectively. Body composition and N balances of the animals were not affected by supplementation of UMM licks, however, protein retention efficiency was higher in group III ($82.57{\pm}2.54$) though nonsignificant. Feed cost/day was reduced from Rs. 7.92 (group I) to Rs. 4.62 (group II) and Rs. 3.44 (group III). Hence, partial replacement of concentrates by UMM licks reduced the cost of feeding of growing calves by 41.7 to 56.6% without affecting the growth performance.

• Asian-Australasian Journal of Animal Sciences
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• 제16권1호
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• pp.57-62
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• 2003

An effort was made to assess comparative production performance in broiler chickens fed diets containing solvent extracted cottonseed meal (CSM) processed from BT and Parental Non-BT lines. Processed meal of national check and commercial produce cottonseeds were also used for comparison. The free gossypol contents were 0.02, 0.02, 0.44 and 0.03% in meals of BT, Parental Non-BT, national check and commercial produce cottonseeds, respectively. Day-old broiler chicks (n=243) were divided to 27 groups of 9 each. Nine dietary treatments (iso-nitrogenous, 23% CP and iso-caloric, 2,800 kcal ME/kg) were formulated viz., D1 (control, soybean meal-SBM based), D2 and D3 (BT CSM at 10% of diet with and without additional iron), D4 and D5 (non-BT CSM with and without additional iron), D6 and D7 (national check CSM with or without additional iron), and D8 and D9 (commercial produce CSM with or without additional iron at 2 ppm for every 1 ppm of free gossypol, respectively). Each dietary treatment was offered to three replicated groups up to 6 weeks of age. At the end of 6 weeks of age, 10 birds were taken out randomly from each treatment and were sacrificed to study carcass traits, organs' yield and histo-pathological changes in vital organs. The broiler chickens received CSM processed from BT (D2, 1,753 g and D3, 1,638 g) and Parental Non-BT (D4, 1,653 g and D5, 1,687 g) with or without additional Fe grew at same rate as observed in soybean meal (solvent ext.) based diet (D1, 1,676 g). The feed intake and feed conversion efficiency (feed: gain) in these dietary treatments (BT, non-BT line based diets) also did not differ significantly (p>0.05) from control diet. Similar observation was also observed in dietary treatments (D8 and D9) containing solvent extracted cottonseed meal of commercial produce origin. However, a decrease (p<0.05) in body weight gain and feed intake was observed in D6 containing national check CSM with high gossypol content. Addition of Fe in the diet (D7) improved (p<0.05) feed intake and weight gain but not to the extent as observed in diets containing BT, parental non-BT, and commercial produce CSM or control. However, any type of CSM did not affect feed conversion efficiency when fed with or without additional iron. The carcass characteristics in terms of dressing percentage, liver weight and heart weight was not significantly (p>0.05) different between the treatments. The eviscerated yields emanated from diets containing either BT, non-BT or commercial produce were statistically similar to control. However, eviscerated yield of broilers fed national check CSM with or without iron supplementation was lower (p<0.05) than BT cotton with Fe supplementation and commercial produce CSM. The study envisaged that BT, parental non-BT and commercial produce solvent extracted cottonseed meal can be included at 10% in soybean meal based broiler diet replacing soybean meal and rice bran without additional iron.

• 한국산학기술학회논문지
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• 제15권11호
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• pp.6958-6965
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• 2014

인천항에서 선박평형수 배출수에 기인한 외래종을 고려한 항만환경 관리수준 설정을 위해 식물플랑크톤의 잠재적 위해종 출현 특성과 관련된 환경영향 요인을 2007년 2월부터 2009년 11월까지 인천항 내측 및 외측에서 계절조사를 수행하였다. 조사결과, 한국 주변해역에서 출현한 바 있는 식물플랑크톤 62종이 관찰되었고, 그 중에 적조원인종 13종과 독소생산종 7종의 잠재적 위해종이 관찰되었다. 잠재적 위해종은 여름철과 겨울철에 인천항 외측에서 더 다양하게 출현하였다. 봄과 겨울철에는 적조원인종인 Skeletonema spp., Thalassiosira nordenskioldii, Paralia sulcata가 항만 내측 (평균 72.4%) 및 외측(평균 77.6%)에서 모두 우점 하였고, 수소이온과 부유물질의 농도와 양의 상관관계를 나타냈다(p<0.05). 여름철에는 인천항 내측에서 적조원인종(Skeletonema spp.) 및 독소생산종(Alexandrium catanella, A. tamarense, Dinophysis acuminata, Pseudo-nitzschia spp.)이 혼합 우점 (평균 74.2%) 하였으나, 외측에서는 Skeletonema spp.와 P. sulcata가 우점 (평균 67.2%)하였다. 연구기간 동안 출현한 독소생산종 들은 용존 무기질산염, 규산염, 인산염 및 화학적 산소요구량과 양의 상관관계를 나타냈다(p<0.05). 식물플랑크톤 엽록소-a 농도는 봄과 여름 및 가을철에 인천항 외측에서 각각 평균 $3.05{\mu}g/L$, $1.49{\mu}g/L$, $5.46{\mu}g/L$로 내측보다 3-5배 높은 농도가 높았고, 겨울철에는 내측 (평균 $0.94{\mu}g/L$) 및 외측 (평균 $0.95{\mu}g/L$) 간 농도 차이가 없었다. 요약하면, 인천항 외측은 다양한 적조원인종이 우점하며 엽록소-a 농도가 높았으나, 항만 내측은 여름철 독소생산종의 출현 종수가 높게 나타났고, 외측에 비해 엽록소-a 농도가 낮았다. 각 위해종들의 대 발생 가능성은 영양염, 화학적 산소요구량 및 부유물질의 농도와 비례한 것으로 나타나, 항만 내, 외측의 환경특성을 고려한 잠재적 위해종 관리가 요구된다.

• Journal of Nutrition and Health
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• 제38권1호
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• pp.56-66
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• 2005

The purpose of this study was to assess the zinc and copper status of type 2 diabetic women and to analyse the relation-ship among zinc and copper status, and diabetic control indices of diabetes. The mean age of diabetes was 57.9 years old. The mean duration of diabetes was 8.0 $\pm$ 6.5 years. The mean daily energy intake of diabetes was 1562 kcal. There were no significant differences of age, BMI, %body fat, nutritional intakes, total energy intake, and energy composition from carbohydrate, protein, and fat between diabetes (n = 50) and control group (n = 68). However, both zinc intake density (4.15 mg/1000 kcal) and zinc %RDA (62.0%) of diabetes were significantly lower than control group (p <0.05, P < 0.01, respectively). The plasma zinc level was not significantly different between diabetes and control group (90$\mu$g/dl, 91$\mu$g/dl respectively). The proportion of diabetic women whose plasma zinc levels were lower than 76 $\mu$g/dl(borderline zinc deficiency) was 18.8%. This was about 38% higher than control group. It has been suggested that insulin secretion might decrease in borderline plasma zinc and copper deficiency and increase in normal plasma zinc and copper status. The urinary zinc excretion was twice higher in diabetes than in control group (p < 0.001). The urinary zinc loss was positively correlated with the duration of diabetes (p < 0.05), hyperglycemia (p < 0.001) and insulin resistance (p < 0.05). These results lead us to conclude that normal blood glucose level controlled by diet therapy could improve the hyperzincuria in diabetic women.