• 한국식품영양학회지
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• 제25권3호
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• pp.637-643
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• 2012

This study was performed to increase the utilization of rice and improve the productivity of jochung, traditional food in Korea. Two kinds of jochung products were prepared from steamed rice(SR) and wet-milled rice flour(WRF) by rice cultivated from 2006 to 2010. It is common to add a liquefying enzyme for rice liquefaction(4 $m{\ell}$/1,000 g rice, at $90{\sim}95^{\circ}C$, 3 h) and saccharogenic enzyme with malt(45 g/1,000 g rice, at $55{\sim}57^{\circ}C$, 6 h). In order to evaluate the quality characteristics of jochung, producing rate, pH, solidity, reducing sugar, dextrose equivalence(D.E.), viscosity, total phenolic compound, color value and sensory evaluation were carried out. In terms of the producing rate of jochung, WRF jochung was produced about 7.4% much more than SR jochung. There was no difference in producing rate between the jochung cultivated from 2006 to 2010 rice. The pH varied from 4.86~5.66, solidity was 79.48~82.28%. Color L value was 25.82~27.92, a value of 1.28~2.81, b value were 2.98~4.33. The results of sensory evaluation for jochung, as a whole, received higher score than for the commercial product(Daesang Co., Ltd, Seoul, Korea), overall acceptability score was the highest in the 2008SR. Reducing sugar, dextrose equivalence(D.E.) and total phenolic compounds were determined to be higher WRF jochung than SR jochung, while viscosity was lower WRF jochung than SR jochung. These results are thought to be due to increased surface area of rice by milling. SR jochung manufacturd by wet-milled rice flour will increase the producing rate for jochung, thereby saving manufacturing time and costs.

• 한국식생활문화학회지
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• 제33권6호
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• pp.588-596
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• 2018

In this study, dry-milled rice flour from different varieties (Samgwang, Boranchan, Hanareum, Dasan, Hangaru) and different particle sizes were used to manufacture Jeung-pyun and the quality characteristics were analyzed. The Jeung-pyun produced from Samgwang, Dasan and Hangaru milled rice flour showed highly dense pores. The Jeung-pyun produced from Hanareum only showed a significant difference according to the particle size. Samgwang, Boranchan and Dasan varieties with a particle size of 150 m showed a significant decrease in volume (p<0.05). Samgwang showed the lowest pH at all particle sizes (p<0.05). The sweetness of Samgwang varieties was the highest at $3.27-3.63^{\circ}Brix$ (p<0.05). The hardness of Jeung-pyun increased with increasing particle size (p<0.05). The highest acceptance of Jeung-pyun in terms of volume and bitter taste was observed with Hanareum at a particle size of 50 m. When the particle size was 50 m, the overall acceptance was highest for Jeung-pyun made from Samgwang followed by Hanareum. The acceptance of all the sensory characteristics was high when the particle size of rice flour was 50 m. When the appearance of Jeung-pyun was measured, Samgwang showed a dense structure and low hardness. Hanareum showed an increasing volume and springiness. Overall Samgwang and Hanareum were found to be the most suitable varieties for the production of Jeung-pyun.

• 한국식품조리과학회지
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• 제25권4호
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• pp.427-434
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• 2009

To increase rice consumption and substitute rice flour for wheat flour to make gluten-free bakery products, the physicochemical and pasting properties of rice flours prepared from raw and soaked rices passed through different size screens were investigated. The quality properties of manju dough and preparation of rice manju were also measured. Dry milled flour with soaked rice (DMFSR) were decreased in ash and crude lipid contents compared to dry milled flour with raw rice (DMFRR). Water binding capacity, damaged starch content, and L value of rice flour increased with decreasing particle size, but the b value decreased. Peak, cold, and breakdown viscosities of DMFSR were higher than those of DMFRR by RVA. Hardness of manju dough with DMFSR was lower than that with DMFRR, but that of manju shell exhibited a reverse trend. Sensory difference testing revealed the smoothness of surface, hardness, roughness, and overall quality were significantly different (p<0.05). The smoothness of the surface of manju with DMFRR-200 and all DMFSR were better than that of manju prepared with wheat flour. Hardness showed lower values in DMFRR-200, and all DMFSR as well as wheat flour and roughness decreased with decreasing particle size. Rice manju with wheat flour, DMFRR-200, DMFSR-120, and DMFSR-170 ranked above 5 points and were not significantly different (p<0.05).

• 한국식생활문화학회지
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• 제1권4호
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• pp.321-333
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• 1986

This study was designed to establish Korean food culture by analizing in sets of Jinyounuigue, Jinchanuigue, and Jinjarkuigue which were the records of royal party procedures in Yi-dynasty. Korean rice cakes were classified into 13 groups in this study; mesirudock 15, chasirudock 12, hapbyung 1, hybyung 1, japkwabyung 1, joak 7, danja 4, sansam 3, jeoungbyung 1, hybyung 1, japkwabyung 1, joak 7, danja 4, sansam 3, jeoungbyung 1, julbyung 5, gapibyung 1, hwajun 1, sanbyung 1 etc. all of 53 different kinds of Korean rice cakes. Food materials were highly milled rice, milled glutinous rice, small red beans, soybeans, chestnuts, jujube, pinenuts, jinkgonut, powder of shingamcho, manna lichen, laver, cinnamon, starch, mugwore, honey, sesamoil, pepper, wine, natural red color, natural yellow color etc.

• 미생물학회지
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• 제26권3호
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• pp.278-282
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• 1988

볏짚을 이용하여 acetone-butanol을 생산하기 위해 전처리한 볏짚을 C. acetobutylicum KCTC 1037(ATCC 4259)과 Trichoderma viride로부터 얻은 섬유소 분해효소를 이용하여 동시당화 발효법 (SSF)으로 발효하였다. Ball-mill로 처리한 볏짚을 SSF로 발효한 결과 acetate와 butyrate안을 생산하였으나, alkali로 전처리한 기질은 230 mM 이상의 solvent를 생산하였다. 이와 같은 발효의 차이는 볏짚에는 alkali 처리로 분해되는 물질이 있으며, 이 물질이 solvent 생산을 저해하기 때문인 것으로 판단된다. 이러한 solvent 생산 저해물질은 물이나 유기용매에 불용성으로 lignin 유도체 혹은 잔류농약으로 추측된다.

• Journal of Biosystems Engineering
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• 제3권2호
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• pp.88-99
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• 1978

In this study, rice harvesting systems suitable to Korean situations and the optimum timing of these systems were determined, respectively, based on experimentally determined factors such as filed yield and the milling quantity and quality measured at various levels of the grain moisture content at harvest. Rice varieties used for the experiment were the AKIBARE (Japonica-type) and the SUWEON 251 (high yielding TONGIL sister-line variety), The harvesting systems studied by the experimental work of this study were traditional system with both the wet material and dry-material threshing system by use of binder with both the dry-material and wet-material threshings, and system by use of combine. Grain samples were taken from final products of the paddy rice harvested from the experiment a fields for each system to measure the recovery rates of the milled rice. The results may be summarized as follows; 1. The milling recovery rate of the AKIBARE variety had highest value within the range of the grain moisture at harvest, showing from 21 to 26 percent. The head-rice recovery for the same variety was a little greater in the wet-material threshing than in the dry-material threshing , higher values of which , were 20 to 25 percent , seen within the range of grain moisture at harvest regardless of the harvesting systems tested. 2. The milling recovery of the SUWEON 251 , when tested for different harvesting systems and harvesting grain moisture, did not show a statistically significant different. In contrast , head-rice recovery for the systems operated by the wet-material threshing was much greater than that by the -material threshing. The difference of the recoveries between these systems range from 2.6 to 4.7 percent. 3. An assessment of the optimum period of -harvest timing for each of the harve\ulcornersting systems tested were made bJ.sed on (a) the maximum total milled-rise yield and (b) the percentage reduction in the total milled-rice yield due to untimely harvest operations. The optimum period determined are: 23-19% for the ATD, AC, STD, SBW, STW systems, 25-21% for the ATW ani ABW systems, and 27-18% for the ABD, SBD, and SC systems, respectively.

• 한국작물학회지
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• 제56권4호
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• pp.342-348
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• 2011

본 연구는 쌀의 생산년도별(2005년, 2006년, 2009년) 품질변이 양상을 구명하기 위하여 남평벼와 동진벼에 대한 다양한 이화학적 특성 및 품질특성을 조사하였다. 저장기간이 길수록 단백질 함량은 증가하였으며, amylose 함량 및 Toyo 윤기치는 감소하는 경향을 보여주었다. 또한 지방산도(KOH mg/100 g)는 2006년산 남평벼와 동진벼가 각각 7.79와 4.79를 나타내었고 2005년산 남평벼와 동진벼가 각각 15.95와 15.68를 나타내어 저장기간이 길수록 2009년산에 비하여 지방산도가 월등히 증가되어 고미취 발생과 산패가 진전된 것으로 보여주었다. 또한 색도는 저장기간이 증가할수록 L값, a값, b값 모두에서 증가하는 경향을 보였다. 아밀로그래프에 의한 호화점도 측정 결과에서는 저장 기간이 증가함에 따라 최저점도, 최종점도 및 치반점도 값은 감소하는 경향을 보였지만 강하점도는 증가하는 경향을 보였다. 경도는 저장기간이 증가할수록 잘 부숴지는 경향을 보였고 식미관능평가 결과에서는 일반적으로 저장기간이 증가할수록 선호도가 매우 낮음을 알 수 있었다. 이상의 결과로부터 쌀은 수확 후 저장기간이 5년이상 경과되면 신선도와 품질이 저하되고 지방산도가 증가되어 고미취 및 이취가 발생하고 쌀자체의 호화 및 취반특성에 많은 변화가 나타나 밥맛과 관련하여 품질이 저하될 뿐만아니라 식품원료로서의 가치가 떨어지는 것으로 확인 할 수 있었다.

• 한국작물학회지
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• 제38권6호
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• pp.524-530
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• 1993

양곡창고에 정조상태로 장기저장한 벼 종실의 이화학적특성 변화를 검토하기 위하여 1987년부터 1992년까지 해마다 생산되어 64개월부터 4개월까지 저장되어 있던 통일형품종 삼강벼를 시험재료로 하여 저장기간이 다른 쌀의 식미관련 이화학적 특성을 조사, 비교한 결과를 요약하면 다음과 같다. 1. 쌀의 지방산도는 저장기간이 길어질수록 증가하였는데 16개월 저장시까지 급격하게 증가하였고 그 이후는 완만한 증가추세를 보였다. 2. 백미의 아밀로스, 마그네슘 및 칼륨함량과 K/Mg 비율은 저장기간의 장단에 따른 변화가 없었고 단백질함량은 저장기간이 길어짐에 따라 감소하였다. 3. 상온 및 가열흡수율은 저장기간이 길어짐에 따라 증가하였는데 상온흡수율은 침지초기에 그리고 가열흡수율은 침지시간이 경과할수록 고미와 신미간 차이가 컸다. 4. 저장기간이 연장됨에 따라 쌀의 알칼리붕괴도는 높아졌으며 호응집성은 감소하는 경향이었다. 5. 쌀가루의 아밀로그램특성 중 최고점도, 최저점도, 냉각점도, breakdown 및 setback은 저장기간이 길어짐에 따라 증가하는 경향이었다. 6. 취반후 팽창용적은 저장기간이 긴 쌀이 짧은 쌀에 비하여 상대적으로 컸으며 용출고형물질과 요드정색도를 나타내는 흡광율은 저장기간이 길어질수록 감소하였다.

• 한국식품과학회지
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• 제38권4호
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• pp.495-500
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• 2006

본 연구에서는 제분기, 건조방법별 등 다양한 조건별로 현미쌀가루 제조하여 각 쌀가루별 품질특성을 조사하였다. 건조조건에 따른 roll mill 제분한 현미쌀가루의 수분함량은 열풍건조 10.7% 마이크로파건조 13.7%로 측정되었다. 대조구인 백미쌀가루의 수분함량은 10.0%였다. Zet mill 분쇄 후 쌀가루의 수분함량은 8.0-8.6%로 측정되었다. WAI는 전분손상도가 높을수록 흡수되는 수분의 양이 증가하여 전분손상도가 가장 높은 Zet mill로 분쇄한 현미쌀가루가 0.58-0.79g/g으로 높았고, 전분손상도가 낮은 roll mill 분쇄한 대조구와 BrWRH 쌀가루가 각각 0.45, 0.40g/g으로 낮은 값을 나타내었다. WSI 역시 WAI와 같이 전분손상도가 증가할수록 증가하는 경향을 나타내었고 입자크기가 감소함에 따라 증가하였다. 대조구 백미 쌀가루 L, a, b는 97.1, -0.4, 4.2로 측정되었고, 현미쌀가루는 분쇄과정에서 생성된 미강층 때문에 L값은 대조구보다 낮고 반면에 b값은 높은 결과를 나타내었다. 제분방법에 따른 L값, b값은 roll mill로 분쇄한 현미쌀가루의 L, b값은 각각 91.3-91.9, 9.2-10.1이었고, zet mill로 제분한 현미쌀가루의 L, b값은 각각 94.1-96.8, 5.8-6.8로 측정되어 입자크기가 작을수록 L값은 증가하였고, b값은 감소하였다. 전분손상도는 대조구가 8.2%로 가장 낮았고, 마이크로파 건조 시 열품건조보다 4-10%정도 높은 전분손상도 값을 보였다. 제분기 종류에 따른 전분손상도는 roll mill 15.5%, zet mill 28.2% 그리고 micro mill 51.9%로 입자크기가 작을수록 전분손상도는 증가하였다. RVA 측정결과 대조구 호화개시온도는 $65.4^{\circ}C$로 가장 낮은 값을 나타내었다. 제분방법에 따른 대조구, BrWRH, BrWZH, HBrZMU 쌀가루의 호화특성 측정결과 최고점도(peak), 최저점도(trough)는 각각 321, 255, 221, 162 RVU와 217, 185, 175, 113 RVU로 측정되어 입자크기가 작아질수록 감소하였다 또한 호화액의 안전성을 나타내는 breakdown 값은 대조구가 105 RVU, 현미 쌀가루가 37-96 RVU로 측정되어다 DSC 분석결과 호화엔탈피$({\Delta}H)$는 대조구가 10.4 J/g으로 가장 높은 값이었고, 가장 작은 입도분포를 나타낸 HBrZMU가 6.1 J/g으로 가장 낮은 값을 보였다. 본 연구결과 가공제품으로 현미쌀가루 이용 시 침지, 건조방법 보다는 제분방법 즉 입도분포가 현미쌀가루의 품질특성에 않은 영향을 미치는 것을 알 수 있었다.

• 한국가정과학회지
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• 제6권2호
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• pp.49-56
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• 2003

The effects of cooking methods on the total dietary fiber(TDF) and enzyme-resistant starch(RS) contents of nonwaxy and waxy milled and brown rices were investigated. The TDF contents of raw rices were 3.77% for nonwaxy brown, 3.41% for waxy brown, 1.37% for nonwaxy milled and 1.14% for waxy milled rices. The TDF contents were higher in brown rices than milled ones and slightly higher in nonwaxy than waxy ones. However, there were no significant differences among raw and cooked rices with. automatic electric cooker and automatic pressure cooker. The TDF contents of cooked rices did not show any increase, but that of waxy milled ones rather slightly decreased by cooking. The RS contents analysed were not significantly different between automatic electric cooking and automatic pressure cooking. The RS contents of cooked rices were 0.05∼0.06% for nonwaxy milled, 0.09∼0.12% for nonwaxy brown, 0.07∼0.08% for waxy milled, 0.11∼0.13% for waxy brown, which showed higher RS content in brown than milled ones, and in waxy than nonwaxy ones. The ratios of RS/TDF were 4.1∼4.2% for nonwaxy milled, 2.8% for nonwaxy brown, 7.5∼8.9% for waxy milled, 3.6∼3.7% for waxy brown, which showed that the higher the TDF contents, the less the contribution of RS to the TDF.