• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 2006년도 추계 학술발표회 논문집
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• pp.561-564
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• 2006

This study is aimed for investigating the engineering properties of concrete containing fly ash, slag powder and limestone powder. The results of this study are as follows; As limestone powder is incresed, slump, air loss and strength is reduced, variation ratio of length is reduced, dynamic modulus of elasticity and neutralization depth is incresed.

• 대한금속재료학회지
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• 제46권1호
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• pp.44-51
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• 2008

The effects of magnetic powder size on electromagnetic wave absorption characteristics in Fe-6.5Si-0.9Cr(wt%) alloy flakes/polymer composite sheets available for quasi-microwave band have been investigated. The composite sheet including small magnetic flakes with the size less than $26{\mu}m$ exhibited high power loss in the GHz frequency range as compared with the sheets having large alloy flakes of $45{\sim}75{\mu}m$. Moreover, both the complex permeability and the loss factor increased with the decrease in size of the alloy flakes. The large power loss of the sheets containing small magnetic flakes was attributed to the high complex permeability, especially their imaginary part. The high complex permeability of the sheets composed of small flakes was considered to be due to the highly thin shape of the flakes inducing low eddy-current loss.

• 한국식생활문화학회지
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• 제27권2호
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• pp.225-232
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• 2012

This study was conducted to investigate the effects of acorn ($Quercus$ autissima carruther) powder on the antioxidant activity and quality characteristics of cookies. Cookies were prepared with different amounts of acorn powder (at ratios of 0, 0.5, 1, 3 and 5% to total flour quantity). Antioxidant activity was estimated based on DPPH free radical scavenging activity and total phenol content in acorn powder and cookies. To analyze quality characteristics, bulk density, pH of the dough, spread factor, loss rate, leavening rate, color, texture profile analysis, and sensory evaluations were measured. Loss rate, a values, total polyphenol contents and DPPH free radical scavenging activity of cookies significantly increased with increasing acorn powder content (p<0.01), whereas pH of the dough, L values and b values of the cookies significantly decreased with increasing acorn powder content (p<0.01). The results of sensory evaluation (appearance, taste, flavor, texture and overall preference) demonstrate that the 3% acorn cookie group showed the highest degree of preference among all items of added acorn powder. From these results, we suggest that acorn is a good ingredient for increasing the consumer acceptability and functionality of cookies.

• 한국분말야금학회:학술대회논문집
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• 한국분말야금학회 1995년도 춘계학술강연 및 발표대회 강연 및 발표논문 초록집
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• pp.31-31
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• 1995

• 한국분말재료학회지
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• 제13권4호
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• pp.256-262
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• 2006

The amorphous $Fe_{73}Si_{16}B_7Nb_3Cu_1$ alloy strip was pulverized to get a flake-shaped powder after annealing at $425^{\circ}C$ for 90 min and subsequently ground to obtain finer flake-shaped powder by using a ball mill. The powder was mixed with polyimide-based binder of $0.5{\sim}3wt%$, and then the mixture was cold compacted to make a toroidal powder core. After crystallization treatment for 1 hour at $380{\sim}600^{\circ}C$, the powder was transformed from amorphous to nanocrystalline with the grain size of $10{\sim}15nm$. Soft magnetic characteristics of the powder core was optimized at $550{\sim}600^{\circ}C$ with the insulating binder of 3wt%. As a result, the powder core showed the outstanding magnetic properties in terms of core loss and permeability, which were originated from the optimization of the grain size and distribution of the insulating binder.

• 한국식품조리과학회지
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• 제32권4호
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• pp.441-448
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• 2016

Purpose: This study was conducted to investigate the effect of cabbage powder on the quality characteristics of rice nutritional bars. Methods: In order to analyze quality characteristics, total phenolic content, DPPH free radical scavenging activity, baking loss rate, leavening rate, specific volume, moisture content, color, texture analysis, and sensory evaluations were assessed. Results: The total phenolic content and DPPH free radical scavenging activity of rice nutritional bars significantly increased with an increase in the content of cabbage powder (p<0.05). The baking loss rate, leavening rate, specific volume, and moisture content of the rice nutritional bars were significantly reduced as the amount of added cabbage powder increased (p<0.05). As the concentration of cabbage powder increased, the lightness and redness of the bars' crust and crumbs decreased, while yellowness increased (p<0.05). In texture analysis, the control bars showed the highest hardness values. Adhesiveness, springiness, and cohesiveness values slightly decreased with higher cabbage powder content in the groups with added cabbage powder (p<0.05). When consumer acceptability was measured, rice nutritional bars prepared with 15% cabbage powder showed the highest scores in color, whereas the rice nutritional bars prepared with 20% cabbage powder showed the lowest scores in flavor (p<0.05). In characteristic intensity rating, the taste and off-flavor of rice nutritional bars significantly increased with increasing amounts of cabbage powder (p<0.05). Conclusion: Judging from our results, it can be concluded that the addition of cabbage powder to rice nutritional bars during processing can enhance consumer preference for the bars, total phenolic content, and DPPH free radical scavenging activity.

• 한국콘텐츠학회논문지
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• 제21권1호
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• pp.203-209
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• 2021

메밀가루의 첨가량(0, 10, 20, 30, 40)을 다르게 제조한 옐로우 레이어 케이크의 품질 특성을 조사하였다. 반죽의 비중은 메밀가루 첨가량이 증가할수록 증가하였다. 케이크 단면의 색도는 메밀가루 첨가량이 증가함에 따라 L값과 b값(황색도)은 낮았으나, a값(적색도)은 증가하였다. 케이크 부피는 메밀가루 첨가량이 많을수록 부피가 작아지는 경향이었다. 케이크 대칭성 및 균일성지수는 대조구와 비교하여 유의적인 차이가 없었으나, 굽기손실률은 메밀가루 첨가 시 다소 낮게 나타났다. 경도는 대조구 보다 메밀가루 첨가량이 증가할수록 유의적으로 높게 나타났다. 관능검사에서 맛은 메밀가루 20% 첨가 시 높은 점수를 얻었으며, 조직감과 종합적기호는 메밀가루 20% 첨가 시까지는 대조구와 유의적 차이가 없었다. 따라서, 밀가루의 일부를 메밀가루로 대체하여 옐로우레이어케이크를 제조하는 경우에는 메밀가루 20% 수준 첨가 시 케이크의 품질이나 기호적 특성이 향상된 제품으로 제조 가능할 것으로 기대된다.

• 한국조리학회지
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• 제22권1호
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• pp.42-51
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• 2016

This study investigated the quality characteristics of sponge cake added with pine leaf powder. The pine leaf powder sponge cake was prepared with different ration of pine leaf powder(0, 10, 20, 30, 40%). The specific gravity, baking loss rate and cake weight increased significantly with increasing the levels of pine leaf powder. In terms of color, lightness and yellowness increased with increasing levels of pine leaf powder. The sponge cake added with ratio of 40% pine leaf powder appeared to be the highest. In terms of textual property evaluation, sponge cake were increased by the level of pine leaf powder. The substance's level of springiness, and cohesiveness decreased by increasing of the level of pine leaf powder. In sensory evaluation, 10% pine leaf e sponge cake was better on taste, overall acceptability, and flavor. The results showed that sponge cake quality with 10% pine leaf powder was considered the best.

• 동아시아식생활학회지
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• 제20권2호
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• pp.299-306
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• 2010

선식의 농도를 달리하여 제조한 식빵의 일반 성분 분석결과, 수분 함량은 대조구가 가장 높게 나타났고, 선식을 첨가한 식빵은 대조구에 비해 낮게 나타났다. 조회분의 경우, 대조구가 1.34%로 가장 낮게 나타났고, 선식의 첨가량이 증가할수록 증가하였다. 조단백칠 함량은 대조구가 가장 높게 나타났고, 선식을 첨가한 식빵이 낮게 나타났으나 유의적인 차이는 없었다. 조지방의 경우, 선식의 첨가량에 따라 증가하였다. 식빵의 무게는 대조군이 가장 낮았다. 높이는 선식의 첨가량이 증가할수록 낮아졌다. 반죽의 발효 시간은 대조구가 가장 짧았고 선식을 첨가한 식빵의 발효 시간이 길게 나타났다. 굽기 손실률은 대조구가 가장 높게 나타났고, 선식의 첨가량이 증가할수록 감소하였다. 견고성은 선식을 15% 첨가한 식빵이 가장 높았고, 대조구가 가장 낮게 나타났다. 응집성은 선식 5% 첨가 식빵이 가장 높게 나타났고, 선식 15% 첨가 식빵이 가장 낮게 나타났다. 검성과 씹힘성은 선식 15% 첨가 식빵이 가장 높게 나타났고, 대조구가 가장 낮게 나타났다. 부착성은 선식 5% 첨가 식빵이 가장 높게 나타났으나, 선식 15% 첨가 식빵과 유의적인 차이는 없었다. 탄력성 측정 결과, 모든 시료간의 유의적인 차이는 나타나지 않았다. 관능 검사 결과, 색은 대조구와 선식 5%, 10% 첨가 식빵이 높게 나타났고, 선식 15% 첨가 식빵의 기호도가 가장 낮게 나타났다. 향미는 선식 5% 첨가 식빵이 가장 높게 나타냈고, 선식 15% 첨가 식빵이 가장 낮게 나타났다. 부드러움은 선식 5%와 10% 첨가 식빵이 가장 높게 나타났고, 전체적인 기호도의 결과는 선식 10% 첨가구가 가장 높게 나타났다. 맛과 조직감은 모든 시료에서 유의적인 차이가 없었다. 이상의 결과에서 선삭 5%와 10% 첨가구가 품질 특성이 높은 것으로 나타났다.

• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 1999년도 학회창립 10주년 기념 1999년도 가을 학술발표회 논문집
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• pp.267-270
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• 1999

In this paper, the application of limestone powder, which produced by being gathered electrically in the process of manufacturing of cement, to high fluidity concrete are investigated. According to the experimental results, especially, high viscosity and the loss of air content are accomplished by applying limestone powder as the partial substitution of fine aggregates. In case of hardened concrete, high compressive strength can be achieved by using limestone powder.