• Title, Summary, Keyword: mixing ratio

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A Study on the Recipe for Yackwa by the mixing ratio of flour (밀가루의 배합비율에 따른 약과 조리에 관한 연구)

  • 홍진숙
    • Korean journal of food and cookery science
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    • v.14 no.3
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    • pp.241-249
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    • 1998
  • The purpose of this study was to develop a recipe for high quality Yackwa (fried cake made of wheat flour) by adjusting the mixing ratio of flours, frying temperature and time. Yackwas were prepared by using 3 kinds of flour mix (3:7, 4:6, and 2:8 of weak to medium ratio), fried at various temperatures and times, and evaluated by mechanical characteristics and sensory evaluation. It was found that Yackwa prepared with 3:7 mixing ratio of flour and fried at 160$^{\circ}C$ for 9 min was most preferred. Yackwas with the same flour mixing ratio and fried at 150-155$^{\circ}C$ for 12∼16 min were also within the range of acceptance. The characteristics of desirable Yackwa were suggested to be soft, crispy, and to have little taste of oil.

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Color Changes in Clarified Fruit and Vegetable Juices by Mixing Ratios

  • Lee, Jun-Ho;Park, Yong-Hee
    • Preventive Nutrition and Food Science
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    • v.5 no.4
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    • pp.197-199
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    • 2000
  • Clarified fruit and vegetable juices (apple, carrot and tangerine) were produced using ultrafiltration and their color change due to the mixing ratio were evaluated. clarification was carried out by passing he supernatant of extracted juice through a filter and also by using a membrane of molecular weight cut-off 10,000 Daltons to obtain the juice ultrafiltrates. The mixing ratio between apple and carrot juices was kept constant at 1:1 while increasing the amount of tangerine juice according to 10, 20, 30, 40 and 50% an stored at 4$^{\circ}C$ prior to the color measurement. Hue angle ({TEX}$h_{ab}${/TEX}) and {TEX}$L^{*}${/TEX}-value increased as the tangerine mixing ratio increased. The color difference indicated by ΔE-value also increased as the amount of tangerine increased indicating that the color of the mixed juice became pale and the changes were slight but distinctive. On the other hand, chroma ({TEX}$C^{*}${/TEX}), {TEX}$La{*}${/TEX}- and {TEX}$b^{*}${/TEX}-values decreased as the tangerine mixing ratio increased indicating that the color of the mixed juice became slightly more grayish and the samples were becoming les yellow. A simple mathematical model to predict each color characteristic is proposed.

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Flow visualization Study on the Turbulent Mixing of Two Fluid Streams(I) (분지관 혼합기의 난류 혼합에 대한 유동 가시화 연구(I))

  • Kim, Gyeong-Cheon;Sin, Dae-Sik;Lee, Bu-Hwan
    • Transactions of the Korean Society of Mechanical Engineers B
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    • v.22 no.1
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    • pp.25-33
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    • 1998
  • An experimental study has been carried out to obtain optimal conditions for turbulent mixing of two fluid streams at various angle branches by a flow visualization method. The main purpose of this study is the utilization of flow visualization method as a fast and efficient way to find the optimal mixing conditions when several flow control parameters are superimposed. It is verified that the optimal conditions estimated by flow visualization method have good agreement with the concentration field measurements. The results demonstrate that the diameter ratio is mainly attributed to the mixing phenomena than the branch pipe angle and the Reynolds number. The most striking fact is that there exists the best diameter ratio, d/D.ident. O.17, which requires the minimum momentum ratio in the range of the present experiment. The velocity ratio for the optimal mixing condition has a value within 2 to 16 according to the different flow parameters.

Co-digestion of Thermophilic Acid-fermented Food Wastes and Sewage Sludge (음식물찌꺼기 고온산발효산물과 하수슬러지의 혼합처리)

  • Ahn, Chul-Woo;Jang, Seong-Ho;Park, Jin-Sik
    • Journal of Environmental Science International
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    • v.15 no.9
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    • pp.897-905
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    • 2006
  • This study has been conducted to investigate biodegradation characteristics and optimum mixing ratio for co-digestion with thermophilic acid-fermented food waste and sewage sludge using batch anaerobic digester. As the basis operating conditions for anaerobic digestion, the reaction temperature was controlled $35{\pm}1^{\circ}C$ and stirrer was set 70rpm. Thermophilic acid-fermented food waste and sewage sludge were mixed at the ratio of 10:0, 7:3, 5:5, 3:7, 0:10 and 5;5(food waste : sewage sludge) as the influent substrates. In results of co-digestion according to mixing ratio of thermophilic fermented food wastes and sewage sludge in batch mesophilic anaerobic digestion reactor, $385mL\;CH_4/g\;VS_{added}$ of methane production rate at 1:1 mixing ratio was more than that of any other mixing ratios. Compared with $293mL\;CH_4/g\;VS_{added}$ of methane production rate at 1:1 mixing ratio of food wastes and sewage sludge, pretreatment of food wastes by thermophilic acid fermentation was more effective in co-digestion with sewage sludge.

A Study on the Variation of Physical Properties by the Water to Cement Ratio and the Mixing Speed for Grout Materials (그라우트재의 물시멘트비 및 혼합속도에 의한 물성변화에 관한 연구)

  • 천병식;김진춘;장의웅;송성호;이준우
    • Proceedings of the Korean Geotechical Society Conference
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    • pp.445-452
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    • 2001
  • Generally, OPC(ordinary portland cement) is used for grouting in Korea, and bentonite has usually been added to prevent the deposition of cement particles. The dispersion of CB(cement bentonite) grout is influenced by variable factors i.e. water to cement ratio, particle size of cement, kind of bentonite, adding volume, methods of adding, viscosity of CB grout materials and curdling time. Among variable factors, the viscosity of CB grout materials is influenced by the dispersion, and dispersion is improved as increasing the mixing speed. In this paper, described a suitable mixing speed of the High Speed Mixer in field, engineering characteristics of CB grout materials vary with the water to cement ratio and the mixing speed as well as confirming the state of dispersion.

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The comparison research of the setting expansion and surface condition by using method of dental stone (치과용 경석고의 사용방법에 따른 경화팽창과 표면상태 비교연구)

  • Park, Soo-chul;Nam, Sang-young;Jung, In-ho
    • Journal of Technologic Dentistry
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    • v.38 no.4
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    • pp.263-272
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    • 2016
  • Purpose: The purpose of this study is to measure and compare a degree of setting expansion of dental stone by time depending on the mixing methods and mixing ratios of dental stone, to compare the surface state of each specimen with the use of an optical camera with microscope, and thereby to provide a fundamental material for making dental prostheses. Methods: The test on setting expansion of dental stone is based on ISO 6873. With two different mixing ratios and three kinds of stone mixing methods, test groups were created, and a total of six types of specimens (N=30) were made. Based on the specimens, the setting expansion rate of each one was measured in each time slot of 24 hours, and the surface of the set stone was measured. Results: According to the analysis on setting expansion rate of stone, the setting expansion of the specimen that was created in the way of vacuum mixing at normal mixing ratio was 0.1944% at 120 minutes; the setting expansion of the specimen that was created in the way of vacuum mixing at the mixing ratio which was 40% higher than normal mixing ratio was 0.195% at 120 minutes; the setting expansion of the specimen that was created in the way of mixing with hands at normal mixing ratio and then removing bubbles in vacuum mixer was 0.196% at 120 minutes. Conclusion: The setting expansion rate of each dental stone specimen was significantly different with the lapse of time up to 24 hours(p<.001).

The mixing characteristics of Unlike Split Triplet(F-O-O-F) Impinging-Jet Injector Elements (F-O-O-F 인젝터의 혼합 특성)

  • Lim Byoungjik;Jung Kihoon;Yoon Youngbin
    • Proceedings of the KSME Conference
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    • pp.283-286
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    • 2002
  • The mixing of fuel and oxidizer and each mass distribution of unlike split triplet(F-O-O-F) injector for liquid rocket which are known to affect the combustion efficiency significantly, has been investigated using PLLIF technique. Experiment is conducted to investigate the effect of mixture ratio(MiR), momentum ratio(MoR) and impinging angle on mixing efficiency. The mixing efficiency, which is introduced by Rupe, gives the global chracteristic of spray mixing. Experiment far comparison with triplet injector(F-O-F), which has same momentum ratio and impinging angle with split triplet injector is conducted.

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A Study on the Shear Charactersitics for Synthetics Fiber Reinformcements Soils (섬유보강토의 전단특성에 관한 연구)

  • 송창섭;임성윤;이용범
    • Proceedings of the Korean Society of Agricultural Engineers Conference
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    • pp.582-587
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    • 1999
  • This study has been done to investigate the characteristics of synthetic fiber reinforcement sol with fully satruated . To this end, consolidated undrained triaxial test was performed on synthetic fiber reinforcement soil using the soft clay and plypropylene fiber . From the results of test, it was formed that the mixing ratio for weight and the aspect ratio of synthetic fiber have an effect on the shear characteristic of synthetic fiber rinforcement soil. Especially shear paramter C has line relationship for mixing ratio of fiber, and øhas parabolic relationship for mixing ratio of fiber.

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Effects of Mixing Ratio of ONP and OCC on Physical Properties of Pulp Molds for Cushion Packaging Materials (완충포장소재를 위한 고지배합비율에 따른 펄프몰드의 물성 변화 연구)

  • Park, In-Sik;Kim, Jai-Neung;Kim, Dae-Yong;Lee, Youn-Suk
    • Journal of Korea Technical Association of The Pulp and Paper Industry
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    • v.40 no.1
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    • pp.47-54
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    • 2008
  • As the demands of environment protection increases, the pulp mold container is developed to substitute for EPS (expanded polystyrene) as a shock absorbing packaging material. The water-absorbing ratio and mechanical properties such as tensile strength and compressive strength of pulp mold are important factors to evaluate its shock absorbing characteristics. Influences of mixing ratios of ONP (old newspaper) and OCC (old corrugated container) on physical properties of pulp mold were investigated at various conditions of temperature and relative humidity. The optimum mixing ratio of ONP and OCC was also searched based on physical properties. The results showed that when relative humidity was increased from 60% to 90%, the water absorption ratio of pulp mold increased significantly, tensile strength decreased 20$\sim$30%, and compressive strength decreased 10$\sim$20%. In addition, the optimum mixing ratio of ONP and OCC was found to be 50%:50%.

A Study on the Desulfurization Efficiency as a Variation of Flow Field Applyed a Mixing Enhancement Apparatus (혼합촉진장치 적용시 유동장 변화에 의한 탈황효율 연구)

  • Chung, J.D.;Kim, J.W.;SeomMun, J.
    • Journal of ILASS-Korea
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    • v.15 no.4
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    • pp.177-181
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    • 2010
  • This paper has designed a mixing enhancement apparatus called Lobed-plate and Step-plate and comparatively calculated desulfurization efficiency of when its shape was changed. The parameters used at this time were the shape, SR ratio and the number of nozzles of the mixing enhancement apparatus and comparatively analyzed desulfurization efficiency according to these parameters. As a result, the Step-plate appeared as more highly by around 4% than Lobed-plate in desulfurization efficiency according to the shape of the mixing promotion apparatus, and when the desulfurization efficiency as a SR ratio is considered, it appeared highly by an average of 5% when the SR ratio is 3 rather than 2. As a result of comparing desulfurization efficiency by fixing the SR ratio and setting the number of nozzles as 4 pieces and 6 pieces, there was no big change in desulfurization efficiency when the SR ratio is 2, but it could be confirmed to improve by around 5% when the SR ratio is 3 when time passed 8 seconds.