• Title/Summary/Keyword: Gelatinization properties

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Pasting and Texture Properties of Rice Blends Formulated with Three Rice Cultivars

  • Choi, In-Duck;Kim, Deog-Su;Son, Jong-Rok;Yang, Chang-Inn;Choi, Im-Su;Kim, Kee-Jong
    • KOREAN JOURNAL OF CROP SCIENCE
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    • v.51 no.spc1
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    • pp.292-296
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    • 2006
  • Three rice cultivars of Goami2 (G2), Ilpumbyeo (IP), and Baegjinju (BJJ) of which physicochemical properties are significantly different, were blended by a simplex-lattice mixture design. The effect of blending those rice cultivars on pasting and texture properties were observed. Rapid Visco Analysis (RVA) indicated that the onset gelatinization temperature of pure blend of G2 rice $(83.80{\pm}0.07^{\circ}C)$ was higher than that of IP $(68.08{\pm}0.01^{\circ}C)$ and BJJ $(68.08{\pm}0.04^{\circ}C)$. Increasing G2 rice resulted in lower peak and breakdown viscosity, and adhesiveness and cohesiveness, whereas higher setback viscosity and hardness. Pasting and texture properties of IP and BJJ indicated that G2 rice has quite different physical characteristics compared to IP and BJJ. Thus, it is expected that blending those three rice cultivars can be used to formulate a desirable rice blend on purpose, furthermore to promote the consumption of G2 rice, which has higher indigestible carbohydrate contents.

Effects of Ginseng on Textural and Sensory Properties of Long Life Noodles (인삼첨가 Long Life 면의 조직감과 관능적 특성)

  • 심창주
    • The Korean Journal of Food And Nutrition
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    • v.12 no.5
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    • pp.523-528
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    • 1999
  • The influence of ginseng on the paste or gelatinization properties by amylograph and mixing properties by farinograph of wheat flour and on quality properties color cooking quality textural and sensory properties and reducing microbial population of LL(Long Life) noodles was studied. The contents of ginseng used were from 5% to 10% based on flour weight. The viscosity property of wheat flour with ginseng was increased the initial pasting temperature but the amylograph peak viscosity were decreased in vice versa. The farinograph absorption stability and breakdown were increased by ginseng. The whiteness of Ll nodles manufactured with ginseng was lower than that of control The shear extrusion force and hardness of LL noodles manufactured with ginseng were shown much higher value than those of control. At cooking quality examination of LL noodles manufactured with ginseng weight of cooked LL noodles was decreased but volum was appeared in ice versa,. Extraction amounts of LL noodles manufactured with ginseng during cooking were much smaller than those of control Total count of microorganism of Ll noodles manufactured with ginseng were decreased during storage at 3$0^{\circ}C$ Sensory properties of cooked LL noodles which was manufactured with ginseng showed quite acceptable. Based on the cooking and sensory evaluation test addition of 7.0% ginseng to wheat flour may be suitable for processing LL noodles.

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Effects of Different Milling Methodes on Physico-chemical Properties & Products (제분방법이 쌀가루 및 제품의 특성에 미치는 영향)

  • Kum, Jun-Seok;Lee, Sang-Hyo;Lee, Hyun-Yu;Kim, Kil-Hwan;Kim, Young-In
    • Korean Journal of Food Science and Technology
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    • v.25 no.5
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    • pp.546-551
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    • 1993
  • Rice flour obtained by four different milling methods, Pin mill. Colloid mill, Micro mill, and Jet mill, were used to investigate physico-chemical properties and product. Crude fat, ash, and protein contents of rice flours between different milling methods were similar. Blue value, amylose content, and damaged starch which related to properties of rice flour were reduced in the order that of Jet mill, Micro mill, Colloid mill, and Pin mill. Water absorption index, water solubility index, and water retention capacity increased as damaged starch increased. Hardness of gel(15%) is the highest value for Pin mill. The finer granules (Jet mill) had lower gelatinization onset(To) and peak(Tp) than any other rice flours. Those result are simillar with amylogram properties. Enthalpy of gelatinization increased as damaged starch increased. Jet mill had the highest score (p<0.05) of overall test in sensory evaluation and good paste properties.

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Physicochemical and textural properties of germinated brown rice according to rice varieties

  • Oh, Sea-Kwan;Cho, Dong-Hwa;Park, Hye-Young;Lee, Seuk-Ki;Choi, Hye-Sun;Park, Jiyoung
    • Proceedings of the Korean Society of Crop Science Conference
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    • 2017.06a
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    • pp.269-269
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    • 2017
  • Germination is one of the techniques used to enhance the texture properties and nutritional value of the brown rice (BR). Therefore, germinated BR (GBR) has received significant attention during the last decade. Physicochemical and cooking properties of brown rice were examined before and after germination. Germination raised the cooking properties, such as water absorption, expanded volume and soluble solid of cooked BR (brown rice). The texture, measured using tensipresser, was significantly improved by germination. The hardness of cooked BR was decreased by germination, but the GBR was sticker. In RVA, all viscosity value (peak viscosity, break down, set back, and final viscosity) of germinated rice flour was also reduced while gelatinization temperature did not change. Amylose content and amylopectin chain length distribution of BR starch were slightly changed by germination. Overall results revealed that germination was an effective tool to improve texture and cooking properties of BR.

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Effects of Calcium on Textural and Sensory Properties of Ramyon (칼슘의 첨가에 따른 라면의 조직감과 관능적 특성)

  • 정재홍
    • The Korean Journal of Food And Nutrition
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    • v.12 no.3
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    • pp.252-257
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    • 1999
  • In an attempt to evaluate the effects of calcium on paste or gelatinization properties by amylograph and mixing properties by farinograph of wheat flour and on viscosity property cooking quality textural and sensory properties of Ramyon were examined. The contents of calcium used were from 1.0% to 3.0% based on flour weight. The viscosity property of wheat flour with calcium was increased the initial past-ing temperature but the amylograph peak viscosity were decreased in vice versa. The farinograph absorp-tion stability and breakdown were increased by calcium. The shear extrusion force and hardness of Ram-yon manufactured with calcium were shown much higher value than those of control. At cooking quality examination of Ramyon manufactured with calcium weight of cooked Ramyon was increased by volume was decreased. Extraction amounts of Ramyon manufactured with calcium during cooking were much smaller than those of control. These changes will provided many advantages in the preparation of Ram-yon. The I2 reaction value of Ramyon manufactured with calcium and control were shown to almost same values. Sensory properties of cooked Ramyon which was manufactured with calcium showed quite acceptable. Based on the cooking and sensory evaluation test addition of 0.3% calcim to wheat flour may be suitable for processing Ramyon.

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A comparative study on cooking qualities of imported and domestic rices(Chuchung byeo) (수입 쌀과 국산 쌀(추청벼)의 취반 특성 비교)

  • 한승희;최은정;오명숙
    • Korean journal of food and cookery science
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    • v.16 no.1
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    • pp.91-97
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    • 2000
  • The cooking properties of imported rice (Thai and Chinese rice, harvested in 1998) were compared with those of domestic rice(Chuchung byeo, harvested in 1998 and 1997). The morphology, general composition, color value, RVA viscosities, cooking properties, texture and sensory properties of raw or cooked rice were measured. Thai rice showed lower water absorption rate than others, however its amylose content and gelatinization temperature were higher. While the cooked Thai rice showed the least preference due to its hard and nonsticky properties, Korean rice harvested in 1998 showed the greatest cooking quality in stickiness and softness. Although Chinese rice was inferior to Korean rice harvested in 1998, there were no significant difference between Chinese rice harvested in 1998 and Korean rice harvested in 1997.

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Rheological Properties of Dried Noodles with Added Enteromorpha intenstinalis Powder (파래 분말을 이용한 국수의 이화학적 물성에 관한 연구)

  • Cho, Hee-Sook
    • Journal of the East Asian Society of Dietary Life
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    • v.20 no.4
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    • pp.567-574
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    • 2010
  • This study was performed to evaluate the physicochemical and quality characteristics of dried noodles when different concentrations of Enteromorpha intenstinalis powder (EIP) were added to the wheat flour, thereby determining which noodle recipe was preferred. The cooking quality, mechanical texture properties, and viscosity of the prepared with noodles were measured, and then a sensory evaluation was conducted on them. The gelatinization points of the composite Enteromorpha intenstinalis powder-wheat flour were shown to have an increased viscosity at $95^{\circ}C$ after 15 minutes. As measured via amylograph, the maximum viscosity values of those samples decreased with increasing EIP content. Also, when increased amounts of EIP were added, both the L and b values were reduced, whereas the a value was increased. The color values, weight and volume of the cooked noodles increased, as did the turbidity of the soup. With regard to the textural characteristics, the EIP additive increased hardness and reduced adhesiveness, cohesiveness and springiness. Overall, according to the results of our sensory evaluations, the noodles prepared with 5% EIP were preferred over other noodles.

Changes of Textural and Organoleptic Properties as Influenced by Preparation Conditions of Buckwheat Mook (메밀묵의 제조조건에 따른 텍스쳐 및 관능적 특성 변화)

  • 정용진;이명희;서지형;이기동
    • Journal of the East Asian Society of Dietary Life
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    • v.8 no.2
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    • pp.155-161
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    • 1998
  • Response surface methodology (RSM) was used for optimizing preparation conditions and monitoring the quality of buckwheat mook prepared using buckwheat starch. The textures(hardness, adhesiveness, cohesiveness and gumminess) of buckwheat mook were decreased in inverse proportion to the increase of water content. the L and b values of Hunter color parameters in buckwheat mook were increased in proportion to the increase of water content. However, The a value of Hunter color parameters of buckwheat mook were decreased in inverse proportion to the increase of water content. Organoleptic properties(color, form, taste and mouth-feel) of buckwheat mook showed a maximum score in 700ml(water content), 14min(gelatinization time)

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The Physicochemical Properties and Cooking Qualities of Barley (보리의 이화학적 특성과 취반성에 관한 연구)

  • 장학길;정일희
    • Journal of the Korean Society of Food Science and Nutrition
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    • v.23 no.5
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    • pp.816-821
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    • 1994
  • The physicochemical properties and cooking qualities of six cultivars of covered barley, four malting barley and six naked barley were investigated. The 1, 000 kernel weight was heavier in the malting barley and ash content was the highest in covered barley. The varietal variation of amylose content was 17.7 to 20.2%. $\beta$-Glucan viscosity was generally lower in the malting barely, and varied greatly among barley cutivars with 2.16 to 8.47 cSt. The pearling rate was highest in naked barley with a mean of 75.5% and protein content of aw and pearled barely was significantly different with cultivars. In the cultivars tested, Doosan 8, Youngsan and Iri 5 showed the higher milling rate. Amylose patterns showed that the covered barley cultivars has lower gelatinization temperature and higher peak height and height at 50 $^{\circ}C$ than the malting and naked barley. The water absorptions were highest in covered barley cultivars , and lowest in naked barley cultivars. The soluble solid was highest in naked barley cultivars.

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Quality Characteristics of Seolgiddeok added with Broccoli(Brassica oleracea var. italica Plen.) Powder (브로콜리 분말을 첨가한 설기떡의 품질 특성)

  • Cho, Kyung-Ryun
    • The Korean Journal of Food And Nutrition
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    • v.22 no.2
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    • pp.229-237
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    • 2009
  • Physical, textural and sensory properties of Seolgiddeok prepared with different amounts of broccoli(Brassica oleracea var. italica Plen.) powder were investigated during 3 days of storage. Moisture content decreased gradually during storage and was less in broccoli powder-amended samples. The color L value decreased significantly with increasing broccoli powder, whereas both redness and yellowness increased. Texture analyses revealed that hardness, chewiness, gumminess, adhesiveness and fracturability of Seolgiddeok tended to decrease in proportion to the amount of broccoli powder in the formula. Seolgiddeok gelatinization was investigated using amylographing. Break down and setback were low in broccoli powder Seolgiddeok. Sensory evaluations revealed that, Seolgiddeok prepared with broccoli powder was superior in flavor, chewiness, softness to unamended samples. Seolgiddeok prepared with 3% broccoli powder showed the highest overall acceptability score. Use of broccoli powder in Seolgiddeok preparation improves sensory characteristics and delays retrogradation.