• 제목/요약/키워드: NPO

검색결과 108건 처리시간 0.024초

NPO 온도특성의 Ni-MLCC 응용을 위한 CaZrO3의 유전특성 및 미세구조 (Dielectric Properties and Microstructure of Modified $CaZrO_3$ for Application of Ni-MLCC with NPO Temperature Characteristics)

  • 전명표;명성재;한익현
    • 한국전기전자재료학회:학술대회논문집
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    • 한국전기전자재료학회 2005년도 추계학술대회 논문집 Vol.18
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    • pp.30-32
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    • 2005

  • The effects of mole ratio and Ti-ion on the dielectric properties and microstructure of modified $CaZrO_3$ composition such as $(Ca_{0.7}Sr_{0.3})_m(Ti_yZr_{1-y})O_3$ were investigated. Ti ions substituted on Zr-sites in these modified $CaZrO_3$ composition strongly affect the sintering density and microstructure of the fired ceramic body. With increasing the amount of Ti substituted on Zr-sites, the sintered density rapidly increased and the dense microstructures were obtained for the compositions having mole ratio of 1.01, whereas the sintered density and microstructures are nearly constant with the content of Ti-ion for the compositions having mole ratio of 0.99. With increasing the content of Ti ion, the curve of TCC (temperature coefficient of capacitance) as a function of temperature rotated clockwise and satisfied the COG characteristics for both of compositions with mole ratio of 0.99 and 1.01. The content of Ti ion seems to be more effective than mole with respect to the controlling of firing and TCC.

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향, 갈변 및 케이킹 억제 가공 처리된 양파의 섭취가 SHR 흰쥐의 혈압에 미치는 영향 (Effect of Raw versus Flavor, Browning and Caking reduced Onion (Allium cepa L.) on Blood Pressure of Spontaneously Hypertensive Rats)

  • 최복수;권지연;한명륜;김명환;김선희;장문정
    • 한국식생활문화학회지
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    • 제23권1호
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    • pp.55-61
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    • 2008

  • Non processed onion (Allium cepa L.) powder or onion powder processed with ${\beta}-cyclodextrin+1%$ calcium chloride+1% soluble starch solution was added to the diet of 16 week old Wistar and spontaneously hypertensive rats (SHR) for 5 weeks. 36 SHR and Wistar rats were randomly divided into 3 diet groups, each of six. They were named control, NPO (non processed onion), PO (processed onion). The rats of the control group were fed diet without onion powder. To NPO and PO groups were added 5% of non processed onion and processed onion, respectively. Body weight gain, food efficiency ratio (FER), blood pressure, angiotensin converting enzyme (ACE) activity and Na excretion of urine and feces were analyzed. The processed onion and non processed onion diet reduced body weight gain without affeting the total food intake in Wistar rats (p<0.05). The body weight gain was lowest in Wistar rats fed with a diet with processed onion powder. The rats fed with diet containing PO or NPO had lower blood systolic blood pressure in SHR (p<0.05). The effect of onion powder on decreasing the blood pressure was not significant in Wistar rats. The ACE activity in lung was lowered in the SHR fed with either PO or NPO (p<0.05) compared to those fed with control diet. The urinary Na excretion was significantly lower in SHR than Wistar rats. The effects of PO and NPO on increasing the urinary and fecal excretion of Na were significant (p<0.05). These results suggest that onion processed with ${\beta}-cyclodextrin+1%$+1% calcium chloride+1% soluble starch solution to reduce volatile flavor, browning and caking preserves an antihypertensive effect of non processed onion.

  • https://doi.org/10.7318/KJFC.2008.23.1.055 인용 PDF KSCI