• Title/Summary/Keyword: Hardness Control

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Analytical Electron Microscopy and Atomic Force Microscopy Reveal a Physical Mechanism of Silicon-Induced Rice Resistance to Blast

  • Kim Ki Woo;Han Seong Sook;Kim Byung Ryun;Park Eun Woo
    • Proceedings of the Korean Society of Plant Pathology Conference
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    • 2005.10a
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    • pp.15-20
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    • 2005
  • Locations of silicon accumulation in rice leaves and its possible association with resistance to rice blast were investigated by analytical electron microscopy and atomic force microscopy. A blast-susceptible cultivar, Jinmi, and partially resistant cultivars, Hwaseong and Suwon345, were grown under a hydroponic culture system with modified Yoshida's nutrient solution. Electron-dense silicon layers were frequently found beneath the cuticle in epidermal cell walls of silicon-treated plants. Increasing levels of silicon were detected in the outer regions of epidermal cell walls. Silicon was present mainly in epidermal cell walls, middle lamella, and Intercellular spaces within subepidermal tissues. Furthermore, silicon was prevalent throughout the leaf surface with relatively small deposition on stomatal guard cells in silicon-treated plants. Force-distance curve measurements revealed relative hardness and smaller adhesion force in silicon-treated plants (18.65 uN) than control plants (28.39 uN). Moreover, force modulation microscopy showed higher mean height values of elastic Images In silicon-treated plants(1.26 V) than in control plants (0.44 V), implying the increased leaf hardness by silicon treatment. These results strongly suggest that silicon-induced cell wall fortification of rice leaves may be closely associated with enhanced host resistance to blast.

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The effect of low energy laser irradiation on wound healing (저에너지 레이저 조사가 창상치유에 미치는 영향)

  • Han, Chang-su;Kim, Myung-cheol
    • Korean Journal of Veterinary Research
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    • v.37 no.3
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    • pp.629-637
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    • 1997
  • This study was performed to determine the optimal dose of laser energy for wound healing. The skin wound with 8mm diameter was induced over the lumbar vertebrae of the rats, and wound squares, scab hardness, hematologic findings and histopathlogic findings according to irradiation of laser energy were studied. 1. Wound square was significantly reduced at Day 1 (p<0.01), 2 (p<0.01), 3 (p<0.05), 7 (p<0.01) and 8 (p<0.05), respectively in experimental groups, especially group II, compared with control group. 2. Scab hardness was significantly increased at Day 1 (p<0.01), 2 (p<0.01), 3 (p<0.05), 5 (p<0.01) and 7 (p<0.01), respectively in experimental groups, especially group II, compared with control group. 3. In hematological findings, red blood cells and white blood cells in experimental group were increased according to the lapse of days, but they were not significant. 4. In histopathologic findings, experimental groups, especially group II, revealed early scab formation, early appearance of phagocytes and fibroblast, rapid growth of granulation tissue and collagen, and promotion of wound healing in the result.

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Quality Characteristics of Backsulgi with Germinated Brown Rice Flour (발아 현미를 첨가한 백설기의 품질 특성)

  • Cho, Kyung-Ryun
    • The Korean Journal of Food And Nutrition
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    • v.20 no.2
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    • pp.185-194
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    • 2007
  • This study was performed to evaluate the physicochemical, sensory evaluation of Backsulgi changed with germinated brown rice flour(GBRF) at different ratio. Moisture content decreased gently during storage and the decrease was less in GBRF-added groups than the control group. The color L value decreased significantly by with increasing the GBRF, wherease the redness(a) and yellowness(b) were both increased. As the result of measurement with texture analyzer, hardness, gumminess, chewiness, adhesiveness and fracturability of Backsulgi tended to decrease in proportion to the amount of GBRF in the formula. The thermal properties of Backsulgi were investigated by differential scanning calorimetry(DSC). Onset temperature and peak temperature of gelatinizatino in thermal characteristics showed low in case of addition of GBRF into Backsulgi. All samples changed with GBRF had low values in change of melting enthalphy. In the sensory evaluation, Backsulgi with GBRF were superior in flavor, cohesiveness, hardness, chewiness and moistureness than that of control. And Backsulgi with 20% GBRF showed the highest score in overall acceptability. Therefore we concluded that the addition of GBRF on Backsulgi improve the sensory characteristics as well as delay the retrogradation.

Effects of Soil Compaction and Artificial Pore Space on the Shoot Density of Tall Fescue (Tall fescue의 밀도변화에 미치는 토양경화와 공극률의 영향)

  • 이주삼;윤용재;김성규;윤익석
    • Journal of The Korean Society of Grassland and Forage Science
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    • v.7 no.2
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    • pp.109-112
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    • 1987
  • This experiment was to study the effects of soil compaction and artificial pore space on the shoot density of tall fescue (Festuca arundinacea Schreb.). Tall fescue subjected to compaction treatments with control, 10, 20 and 40 kg power roller, used for two times bi-weekly during six months. Artificial pore space treatments were control, 13.5, 37.5 and 84.5% at 0-lOcm depth, respectively. 1. Soil compaction increased soil hardness and soil bulk density.2. Compaction level of lOkg (soil hardness 2.5kg/$cm^3$) showed the highest shoot density than that of other treatments. 3. Artificial pore space was positive significant correlated (p<0.01) with shoot density. 4. When over the 37.5% of total pore space could be mainternance for high shoot density after the soil compacted.

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Effect of Chicory Fiber and Smoking on Quality Characteristics of Restructured Sausages

  • Choi, Hyun-Su;Choi, Hyung-Gyu;Choi, Yeong-Seok;Kim, Jong-Hee;Lee, Ju-Ho;Jung, Eun-Hee;Lee, Sang-Hwa;Choi, Yang-Il;Choi, Jung-Seok
    • Food Science of Animal Resources
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    • v.36 no.1
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    • pp.131-136
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    • 2016
  • This study was conducted to investigate the effects of chicory fiber for the replacement of fat and smoking on quality characteristics of restructured sausages. Treatments were as follows; Control: Pork backfat 20%, T1: Pork backfat 10% + Chicory fiber 10%, T2: Control + Smoking, T3: T1 + Smoking. The addition of chicory fiber significantly reduced the moisture, fat, hardness and pH values, whereas the smoking treatment increased the fat, redness and pH values of restructured sausages (p<0.01). Additionally, interaction of them significantly affected the ash, chewiness and hardness values of restructured sausages. As a result, although the addition of chicory fiber decreased the quality characteristics of sausage, smoking treatment improved the reduced quality. Therefore, the chicory fiber and smoking treatment is helpful to develop restructured sausage products with reduced fat and compensated quality.

Quality Characteristics of Muffins with Korean Whole Wheat Flour (국내산 전립분을 첨가한 머핀의 품질 특성)

  • An, Hyelyung
    • Culinary science and hospitality research
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    • v.23 no.4
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    • pp.125-134
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    • 2017
  • This study aimed to examine quality properties of muffin by the amount of addition of Korean whole wheat flour (0%, 25%, 50%, 75%, 100%) as there is increasingly higher interest in the healthy food. The effect of Korean whole wheat flour were evaluated in terms of height, volume, weight, specific volume, baking loss rate, colorimeter, and sensory evaluation. Texture and moisture contents of muffins when storage (1, 3, 5 days) was measured. As the ratio of Korean whole wheat flour increased, the baking loss rate and weight increased, whereas the volume and specific volume was not significant. During storage, moisture content of muffins decreased significantly. The addition of Korean whole wheat flour increased lightness (L value) of crust and crumb decreased, whereas redness (a value) and yellowness (b value) increased. The control group (CON) showed the highest springiness lowest hardness. The muffin with 25% of Korean whole wheat flour (WHF25) in test group showed the high springiness low hardness. According to the sensory evaluation, the control group showed the highest score in terms of taste, however WHF25 showed the highest score in appearance, color, flavor, texture and overall acceptance, WHF25 showed the best result and the optimum addition of Korean whole wheat flour. Furthermore, this study proposes the possibility of development of various confectionery with using Korean whole wheat flour.

Quality Characteristics of Muffins with Tagatose (타가토스를 첨가한 머핀의 품질 특성)

  • Hwang, Yoon-Kyung;Lee, Hee-Tae;An, Hye-Lyung
    • Journal of the East Asian Society of Dietary Life
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    • v.24 no.6
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    • pp.802-810
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    • 2014
  • This study investigated the quality characteristics of muffins prepared with tagatose. The effect of tagatose were evaluated in terms of height, volume, weight, specific volume, baking loss rate, moisture contents, colorimeter, sensory evaluation, and texture of muffins during storage (1, 3, 5 days) and texture was measured using a texture analyzer. As the ratio of tagatose increased, the volume, specific volume, baking loss rate, and height decreased, whereas moisture content increased. During storage, control without tagatose showed the highest springiness lowest hardness by TPA, whereas hardness of muffins increased and springiness decreased as the contents of tagatose increased. Lightness of crust and crumb decreased significantly as contents of tagatose increased. According to the sensory evaluation, the control group showed the highest score in terms of texture but was not significant with 2% tagatose (T2). For appearance, color, flavor, taste, and overall acceptance, T2 showed the best result.

Quality Characteristics of Riceyeotgangjung with Added Spirulina Powder (스피루리나 첨가 쌀엿강정의 품질 특성)

  • Shim, Eun-Kyoung;Kim, Hyo-Jin;Kim, Hye-Ran;Kim, Mee-Ree
    • Journal of the East Asian Society of Dietary Life
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    • v.20 no.6
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    • pp.888-895
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    • 2010
  • Riceyeotgangjung (RYG) with added spirulina was prepared with citron juice for masking of odor. Oil temperature for puffing was found to be $220^{\circ}C$ for frying dry rice based upon the results of expansion rate and color. RYGs with added spirulina (1, 2, and 3%) were prepared under the above conditions, and their physicochemical and sensory properties were examined under storage at $60^{\circ}C$ for 15 days. Moisture content of RYG decreased proportionally with the spirulina content and storage time. The hardness levels of the freshly made RYGs with spirulina were higher than that of control. During storage, the hardness of the control gradually increased, but those of the RYGs with spirulina gradually decreased, although no significant differences existed between the spirulina containing RYGs. Lightness and redness values in the Hunter color system decreased according to the spirulina content and storage time. Yellowness value also increased with the spirulina content and storage time. Phycocyanin and total phenolic content increased with spirulina content, but decreased with the storage period. Sensory evaluation results showed that RYG with 2% added spirulina received the highest scores for color, taste, overall acceptability, and intention of purchase. As a result, the optimal addition amount of spirulina to RYG is recommended to be 2%.

Quality Characteristics of Cookies Containing Yacon (Smallanthus sonchifolius) Leaf Powder (야콘잎 분말을 첨가한 쿠키의 품질특성)

  • Shim, Eun-Ah;Kwon, Yong-Min;Lee, Jin-Sil
    • Journal of the Korean Society of Food Culture
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    • v.27 no.1
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    • pp.82-88
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    • 2012
  • In this study, the effects of yacon (Smallanthus sonchifolius) leaf on the quality characteristics of cookies were examined. In order to investigate its effects, four different amounts (0%: Control, Y-0.5, Y-1.0, Y-1.5) of yacon leaf powder were added to the cookie dough. Among the physicochemical and sensory characteristics, the density and pH of the dough, spread factor, color value, firmness, consumer acceptability, and Pearson's correlation coefficients were measured. Although there was no significant difference in pH of the doughs among the groups, density significantly decreased with increasing amount of yacon leaf powder (p<0.05). While the L, a, b values, and hardness decreased significantly, DPPH free radical scavenging activity increased significantly as the content of yacon leaf powder increased (p<0.05). Overall acceptability, appearance, taste, and texture between the control and Y-0.5 groups showed no significant differences. This study suggests the possibility of yacon leaf as an ingredient that increases the functionality of cookies.

Quality Characteristics of Sulgidduk with added Soybean Curd Residue Powder (비지분말 첨가에 의한 설기떡의 품질특성)

  • Lim, Sung-Mee;Lee, Goon-Ja
    • Korean journal of food and cookery science
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    • v.22 no.5 s.95
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    • pp.583-590
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    • 2006
  • This study was carried out to investigate the acceptable ratio of Sulgidduk with added soybean curd residue powder. The moisture content of Sulgidduk with added soybean curd residue powder (0${\sim}$ 10%) ranged from 40.54 ${\sim}$41.38%, and there were no significant differences between the addition of soybean curd residue powder and control. There were also no significant differences in swelling power and pore ratio from control to the addition of 4% soybean curd residue powder. However, these decreased with increasing addition of soybean curd residue powder of more than 6%. The L (lightness) value decreased with increasing addition of soybean curd residue powder, but the a (redness) and b (yellowness) values increased significantly. As the amount of soybean curd residue powder increased, the hardness, cohesiveness, springiness and gumminess decreased, and, the decrease was especially significant with addition of more than 6%. With increases in the storage period, the hardness, springiness and gumminess increased, while cohesiveness decreased for all additions of soybean curd residue powder. In sensory evaluations, Sulgidduk with the addition of 4% soybean curd residue powder was the most preferred with regard to overall quality. These results indicated that the Sulgidduk with 2% and 4% added soybean curd residue powder exhibited the best quality.