• 제목/요약/키워드: dry milling

검색결과 139건 처리시간 0.027초

쌀가루 제분방법 및 입자크기에 따른 백설기 품질특성 (Quality Characteristics of Rice Cake(Backsulki) According to Millling Type and Particle Size)

  • 최봉규;금준석;이현유;박종대
    • 한국식품저장유통학회지
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    • 제12권3호
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    • pp.230-234
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    • 2005
  • 백설기 제조시 쌀가루 제분방법 및 입자크기가 백설기 관능특성과 품질특성에 미치는 영향을 조사하였다. 품질특성 측정결과 수분함량은 제분방법에 따라 $31.9{\sim}34.8\%$로 나타났다. L value는 W80(more than $180\;{\mu}m$ rice flour using wet milling)이 가장 높은 값인 92.5를 나타냈고, D80(more than $180\;{\mu}m$ rice flour using dry milling)이 가장 낮은 값인 79.0을 나타냈다. 호화도 측정결과 제분방법에 따른 유의적인 차이가 나타나지 않았다. 조직감 측정결과 탄력성(springiness), 응집성(cohesiveness), 씹힘성(chewiness), 껌성(gumminess)은 입자크기에 따른 유의적인 차이를 나타내지 않았고, 경도(hardness) 측정결과 입자크기가 작아질수록 낮은 수치를 나타내었다. 관능검사 측정결과에서는 W80으로 만든 백설기가 강도 및 기호도 검사에서 가장 높은 점수를 나타내었다.

Influence of Frit Surface on the Transmittance of Transparent Dielectric in PDP

  • Kim, Hyung-Sun;Cha, Myung-Lyoung
    • 한국정보디스플레이학회:학술대회논문집
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    • 한국정보디스플레이학회 2005년도 International Meeting on Information Displayvol.II
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    • pp.828-831
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    • 2005
  • Producing high transparency dielectric is still one of the most important subjects in the PDP process for improving luminous efficiency. It has been reported by many workers that transparency is improved by controlling the composition of the frit, the frit size and distribution, and the firing atmosphere. To understand the mechanism of discoloration of frit, $Bi_2O_3$ and $B_2O_3$ glasses were used for a leaching test using water and alcohol solution in milling. As a result, the frit prepared by wet milling had lower chemical durability than that prepared by dry milling. The leached layer around the frit showed high stability for heat treatment because the frit surface was covered with hydroxides or hydrates which was resulted from a reaction between the frit and the solution during milling.

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탄소 및 탄소화합물이 도핑된 $MgB_2$ 초전도체의 볼밀링 효과 (Effect of Ball-Milling on the Superconducting Properties of C and C-Based Compound Doped $MgB_2$)

  • 안중호;장민규;오상준
    • Progress in Superconductivity
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    • 제10권1호
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    • pp.17-22
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    • 2008
  • We have examined the effect of ball-milling on the superconducting properties of $MgB_2$ doped with C. The ball-milling of pre-reacted $MgB_2$ powder was carried out in dry or wet state using C or diethylenetriamine ($C_{4}H_{13}N_3$) as additives. The diethylenetriamine, whose chemical formula contains no oxygen, was chosen to avoid an excess oxidation during doping. The superconducting transition temperature (Tc) of the ball-milled or doped $MgB_2$ powders was only slightly smaller than that of undoped $MgB_2$. The critical current density (Jc) of the highly ball-milled $MgB_2$ was higher than that of C-doped $MgB_2$. The addition of diethylenetriamine was detrimental to Jc, although Tc was almost unchanged.

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제분방법을 달리한 찹쌀가루로 만든 인절미의 텍스처 특성에 물 첨가량이 미치는 효과 (The Effect of Added Water Volume on the Textural Properties of Injulmi made from Waxy Rice Flours using Different Milling Methods)

  • 김정옥;신말식
    • 한국가정과학회지
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    • 제5권2호
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    • pp.33-43
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    • 2002
  • This study was investigated textural properties of Injulmi affected by milling methods, varieties and added water volume. Sinsunchalbyeo and Hwasunchalbyeo flours were made using Rin-dry milling(PDM) and roll-wet milling(RWM) methods. The proximate composition of waxy rice starches and waxy rice flours were similar. Water binding capacity, soluble carbohydrate and damaged starch of waxy rice flour by RWM: were higher than those of waxy rice flours by PDM. By increasing added water volume, hardness and adhesiveness of Injulmi were decreased. By increasing storage time, hardness of Injulmi was increased, but adhesiveness was decreased. The hardness of Injulmi made from waxy rice flours by PDM was higher than by RDW.

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알루미늄 호일 스크랩 재활용에 의한 플레이크 분말 제조 (Preparation of Aluminum Flake Powder by Recycling of Foil Scrap)

  • 홍성현;김병기
    • 자원리싸이클링
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    • 제9권4호
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    • pp.50-55
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    • 2000
  • 알루미늄 호일 스크랩의 건식 및 습식 볼밀링에 의하여 알루미늄 플레이크 분말을 체조하는 재활용 기술에 대해 여 연구하였다. 볼밀링시 알루미늄 호일 스크랩들은 볼에 의한 미소 단조에 의하여 서로 층상으로 겹쳐지고 연산되면서 작은 호일로 쪼개진 후 플레이크 분말로 변하였다. 이러한 스크랩중에 $60\mu\textrm{m}$ 이하의 호일 스크랩은 볼밀링에 의하여 알루미늄 페이스트로 재활용이 가능하였고 초기 호일의 두께가 작을수록 쉽게 플레이크 분말화가 가능 하였다. 알루미늄 호일 스크랩의 봉밀링에 의하여 얻은 풀레이크 분말을 함유하는 알루미늄 페이스트와 가스 분사된 분말을 초기원료로 사용하여 불밀링한 플레이크 분말을 함유하는 페]이스트를 유리관위에 폐인팅한 후 외관 및 광택도를 비교한 결과, 그 특성은 유사하였다.

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제분방법을 달리한 분질미, 연질미 및 경질미를 이용한 잉글리쉬 머핀의 품질특성 (Quality Characteristics of English Muffin with Powdered, Soft and Hard Type Rice Flour by Different Grinding Methods)

  • 최옥자;심기훈;마은빛;이슬;손경숙;정희남
    • 한국식품조리과학회지
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    • 제31권5호
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    • pp.544-550
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    • 2015
  • 분질미, 연질미 및 경질미 쌀 품종을 건식제분과 습식제분 방법으로 제조한 쌀가루의 bakery 제품 활용도를 알아보기 위해서 제조한 잉글리쉬 머핀의 품질특성을 비교한 결과는 다음과 같다. 각각의 쌀가루로 제조한 잉글리쉬 머핀의 무게는 시료간에 유의한 차이가 없었고, 부피, 부피팽창율 및 비용적은 습식제분 분질미 쌀가루를 이용한 잉글리쉬 머핀에서 가장 높았으며, 건식제분 경질미 쌀가루로 제조한 잉글리쉬 머핀에서 가장 낮았다. 외관과 단면 형태를 살펴본 결과, 습식제분 분질미와 연질미 그리고 건식제분 분질미를 이용한 잉글리쉬 머핀이 가장 좋게 나타났다. 색도 측정 결과, L값은 건식제분 경질미를 이용한 잉글리쉬 머핀이 가장 높았고, b값은 건식제분 분질미를 이용한 잉글리쉬 머핀이 가장 높았다. 경도, 점착성 및 씹힘성은 습식제분 분질미를 이용한 잉글리쉬 머핀에서 가장 낮아 부드러웠고, 건식제분 경질미 쌀가루를 이용한 잉글리쉬 머핀에서 가장 높아 단단하게 나타났다. 관능검사 측정 결과, 색, 향미, 외형, 질감 및 전체적인 기호도는 습식제분 분질미 쌀가루를 이용한 잉글리쉬 머핀이 가장 높게 나타났고, 맛에 대한 기호도는 습식제분 연질미 쌀가루를 이용한 잉글리쉬 머핀이 가장 높게 나타났다.

Statistical analysis and modelization of tool life and vibration in dry face milling of AISI 52100 STEEL in annealed and hardened conditions

  • Benghersallah, Mohieddine;Medjber, Ali;Zahaf, Mohamed Zakaria;Tibakh, Idriss;Amirat, Abdelaziz
    • Advances in materials Research
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    • 제9권3호
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    • pp.189-202
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    • 2020
  • The objective of the present work is to investigate the effect of cutting parameters (Vc, fz and ap) on tool life and the level of vibrations velocity in the machined part during face milling operation of hardened AISI 52100 steel. Dry-face milling has been achieved in the annealed (28 HRc) and quenched (55 HRc) conditions using multi-layer coating micro-grain carbide inserts. Statistical analysis based on the Response surface methodology (RSM) and ANOVA analysis have been conducted through a plan of experiments methodology using a reduced Taguchi table (L9) in order to obtain engineering models for tool life and vibration velocity in the workpiece for both heat treatment conditions. The results show that the cutting speed has a dominant influence on tool life for both soft and hard part. Cutting speed and feed per tooth is the most significant parameters for vibration levels. Comparing the experimental values with those predicted by the developed engineering models of tool life and levels of vibrations velocity, a good correlation has been obtained (between 97% and 99%) in annealed and hard conditions.

볼엔드밀을 이용한 고속가공에서 가공환경 변화에 따른 열특성 평가 (Evaluation of thermal characteristics by cutting environments in high speed ball end-milling)

  • 이채문
    • 한국공작기계학회:학술대회논문집
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    • 한국공작기계학회 2000년도 춘계학술대회논문집 - 한국공작기계학회
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    • pp.34-38
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    • 2000
  • The trend of cutting process today goes toward higher precision and higher efficiency. Many thermal/frictional troubles occur in high-speed machining of die and mold steels.In this paper, the thermal characteristics are evaluated in high sped ball end-milling of hardened steel(HRc42). Experimental work is performed on the effect of cutting environments on tool life and cutting temperature. Cutting environments involve dry, wet(20bar), compressed chilly air at -9$^{\circ}C$, compressed chilly air at -35$^{\circ}C$. The measuring technique of cutting temperature using implanted thermocouple is used. The cutting temperature is about 79$0^{\circ}C$, 35$0^{\circ}C$ and 54$0^{\circ}C$ in dry, wet and compressed chilly air at +9$^{\circ}C$, respectively. The tool life for compressed chilly air at -9$^{\circ}C$ is longer than all other cutting environments in experiment.

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