• 제목/요약/키워드: Head rice

검색결과 346건 처리시간 0.026초

Effect of Chitosan Solution on the Inhibition of Pseudomonas fluorescens Causing Bacterial Head Rot of Broccoli

  • Li, Bin;Liu, Baoping;Su, Ting;Fang, Yuan;Xie, Guanlin;Wang, Guofen;Wang, Yanli;Sun, Guochang
    • The Plant Pathology Journal
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    • 제26권2호
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    • pp.189-193
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    • 2010
  • The in vitro antibacterial properties of two kinds of chitosan solutions and their effect in protection of broccoli from bacterial head rot disease were evaluated. Results showed that the two kinds of chitosan solution at different concentrations exhibited strong antibacterial activity against Pseudomonas fluorescens. However, the antibacterial activity of chitosan A solution increased with the increase of chitosan concentration up to 0.10 mg/ml while the antibacterial activity of chitosan B solution increased with the increase of chitosan concentration up to 0.05 mg/ml. In addition, the antibacterial activity of chitosan A and chitosan B solution of 0.10 mg/ml increased with the incubation time within 12 h and 24 h, respectively. The disease incidence and the lesion diameter of broccoli inoculated with P. fluorescens were significantly reduced when plants were either pretreated or post-treated with six different combinations of chitosan solutions. Overall, the results indicated that the two kinds of chitosan solutions had a potential in controlling bacterial head rot of broccoli.

Major Characteristics Affecting the Sensory Quality of Rice Marketed in Korea

  • Jang, Eun-Hee;Kim, Qui-Woung;Kim, Hoon;Kim, Dong-Chul;Lee, Se-Eun;Kim, Sang-Sook
    • Food Science and Biotechnology
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    • 제17권1호
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    • pp.66-71
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    • 2008
  • A total of 284 milled rice (MR) marketed in Korea were analyzed for grading characteristics (head rice, broken kernels, chalky kernels, and damaged kernels%), color characteristics (L-, a-, b-values, and whiteness), protein content (%), and the cooked rice (CR) sensory quality to investigate the key characteristics affecting the overall sensory quality of rice marketed in Korea. Relatively high correlation with the overall sensory quality of the CR was found in color characteristics such b-value of the CR (r=-0.779) and MR (r=-0.545), the a-value of the CR (r=0.513), and the whiteness (r=0.298) of the MR, compared to protein (r=-0.150), and the moisture (r=0.158) contents of the MR and the percentage of head rice (r=0.195). Partial least squares (PLS) regression of the CR b-value with various characteristics of the MR showed that CR b-value was increased with MR b-value effectively, followed by protein content, damaged kernels, chalky kernels, and colored kernels of MR while it was decreased with whiteness and moisture content for the MR.

콤바인의 자동제어(自動制御)에 관한 연구(硏究)(III) -자탈형(自脱型) 콤바인의 탈곡(脱穀)깊이 자동제어(自動制御)- (Automatic Control of the Combine(III) -Automatic Feeding Depth Control of the Head-feed Combine-)

  • 정창주;김상천;남광희
    • Journal of Biosystems Engineering
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    • 제14권2호
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    • pp.94-103
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    • 1989
  • This study was intended to develop the automatic feeding depth control system of the head-feed combine which could feed the rice head into threshing unit at the optimal depth regardless of plant height and uneven ground surface. In the control system, one-board microcomputer was used for the controller instead of conventional electric circuits. Field test of the combine equipped with the control system was conducted to evaluate its overall performance. It was also investigated how the location and time delay of rice head sensor affect the system performance.

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벼의 순환병류건조기(循環竝流乾操機)의 시뮬레이션 (Simulation of Rice Circulating Concurrent-flow Dryer)

  • 금동혁;이왕석
    • Journal of Biosystems Engineering
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    • 제13권3호
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    • pp.59-70
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    • 1988
  • A computer simulation model for rice circulating concurrent-flow dryer was developed and verified by conduction a series of pilot-scale experiment. The effects of design parameter and operating conditions on dryer performance were analyzed by using simulation. The results indicated that the developed model was found suitable for analyzing operating characteristics. The other results from simulation also showed that; 1) an increse in the initial moisture content resulted in an increase in the drying rate and a reduction in the grain temperature and total energy requirements. 2) an increase in the drying air temperature resulted in an increase in the drying rate and grain temperature. 3) an increase in air flow rate resulted in an radical increase in drying rate, fan power requirements and total energy requirements but an radical decrease in final head rice yield. 4) an increase in the bed depth resulted in an increase in fan power requirements and a lowering of the final head rice yield.

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쌀의 품질평가 현황과 금후 연구방향 (Trend and Further Research of Rice Quality Evaluation)

  • 손종록;김재현;이정일;윤영환;김제규;황흥구;문헌팔
    • 한국작물학회지
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    • 제47권
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    • pp.33-54
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    • 2002
  • Rice quality is much dependent on the pre-and post harvest management. There are many parameters which influence rice or cooked rice qualitys such as cultivars, climate, soil, harvest time, drying, milling, storage, safety, nutritive value, taste, marketing, eating, cooking conditions, and each nations' food culture. Thus, vice evaluation might not be carried out by only some parameters. Physicochemical evaluation of rice deals with amy-lose content, gelatinizing property, and its relation with taste. The amylose content of good vice in Korea is defined at 17 to 20%. Other parameters considered are as follows; ratio of protein body-1 per total protein amount in relation to taste, and oleic/linoleic acid ratio in relation to storage safety. The rice higher Mg/K ratio is considered as high quality. The optimum value is over 1.5 to 1.6. It was reported that the contents of oligosaccharide, glutamic acid or its derivatives and its proportionalities have high corelation with the taste of rice. Major aromatic compounds in rice have been known as hexanal, acetone, pentanal, butanal, octanal, and heptanal. Recently, it was found that muco-polysaccharides are solubilized during cooking. Cooked rice surface is coated by the muco-polysaccharide. The muco-polysaccharide aye contributing to the consistency and collecting free amino acids and vitamins. Thus, these parameters might be regarded as important items for quality and taste evaluation of rice. Ingredients of rice related with the taste are not confined to the total rice grain. In the internal kernel, starch is main component but nitrogen and mineral compounds are localized at the external kernel. The ingredients related with taste are contained in 91 to 86% part of the outside kernel. For safety that is considered an important evaluation item of rice quality, each residual tolerance limit for agricultural chemicals must be adopted in our country. During drying, rice quality can decline by the reasons of high drying temperature, overdrying, and rapid drying. These result in cracked grain or decolored kernel. Intrinsic enzymes react partially during the rice storage. Because of these enzymes, starch, lipid, or protein can be slowly degraded, resulting in the decline of appearance quality, occurrence of aging aroma, and increased hardness of cooked rice. Milling conditions concerned with quality are paddy quality, milling method, and milling machines. To produce high quality rice, head rice must contain over three fourths of the normal rice kernels, and broken, damaged, colored, and immature kernels must be eliminated. In addition to milling equipment, color sorter and length grader must be installed for the production of such rice. Head rice was examined using the 45 brand rices circulating in Korea, Japan, America, Australia, and China. It was found that the head rice rate of brand rice in our country was approximately 57.4% and 80-86% in foreign countries. In order to develop a rice quality evaluation system, evaluation of technics must be further developed : more detailed measure of qualities, search for taste-related components, creation and grade classification of quality evaluation factors at each management stage of treatment after harvest, evaluation of rice as food material as well as for rice cooking, and method development for simple evaluation and establishment of equation for palatability. On policy concerns, the following must be conducted : development of price discrimination in conformity to rice cultivar and grade under the basis of quality evaluation method, fixation of head rice branding, and introduction of low temperature circulation.

자탈형 콤바인 탈곡부 설계요인(設計要因)의 적정화(適正化)를 위한 연구(硏究)(II) -탈곡치의 탈곡특성- (Optimizing the design factors of the head-feed type combine(II) -Threshing characteristics of the head-feed threshing teeth-)

  • 남상일;정창주
    • Journal of Biosystems Engineering
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    • 제13권4호
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    • pp.9-19
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    • 1988
  • The threshing of head-feed combine may be accomplished mainly by the action of impact between threshing teeth and rice. In this study, it was attempted to assess threshing performance characteristics of head-feed threshing teeth. And the characteristics of threshing teeth will be applied to the method which could analyze the time and order of impact between teeth and the rice, which was used as a basis for predicting the threshing performance and determining the optimum design parameters. The results of the study are summarized as follows: 1. About 50% of threshed material were threshed by the beginning 7 impacts on the rice bundle. Threshing torque decreased until 25 impacts and did not change thereafter. 2. There was significant difference in the threshability according to the shape of threshing teeth. The triangular-shaped tooth was the most efficient in threshability ratio and the semicircle-shaped tooth was the lowest. There was no significant difference in specific energy requirement for the varied teeth design. Torn-head ratio being generated by the semicircle-shaped and the triangular-shaped teeth in series was less than that by a single tooth with the triangular-shaped and the double setting of the triangular-shaped. Chaff generation ratio by the triangular-shaped and the semicircle-shaped teeth was less than the others tried. 3. The triangular-shaped teeth in series, which was newly designed for this study, showed an intermediate characteristics between the double setting of the triangular-shaped and the semicircle- shaped teeth. Threshability ratio of the triangular-shaped teeth in series was higher than that of the semicircle and lower than the double setting of the triangular-shaped tooth. Torn-head generation ratio for it was about same as that of the semicircle. Chaff being generated by the triangular-shaped teeth in series was about same as the double setting of the triangular-shaped teeth. 4. About 40% of threshed grains which passed through concave were concentrated under the threshing tooth and the rest of grains displayed a skew distribution toward the inlet of threshing chamber.

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전라북도 브랜드 쌀과 국내 및 수입 유통쌀의 품질 특성 비교 (Quality of Jeonbuk-originated Brand Rice Compared with Other Domestic Brands and Imported Market Rice)

  • 송영은;조승현;권영립;최동칠
    • 한국작물학회지
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    • 제53권4호
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    • pp.347-352
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    • 2008
  • 전북 유통브랜드 쌀과 국내 및 수입쌀과의 품질특성을 비교한 결과를 요약하면 다음과 같다. 1. 전북유통브랜드 쌀의 품종은 일미가 대부분을 차지하였고 그 외 신동진, 일본계 품종, 여러 품종이 섞인 일반계 품종이었다. 2. 전북우수브랜드와 전북 외 우수브랜드 쌀의 시기별 품질변화에서 완전미율과 맛에 영향을 주는 수분함량, 식미값 등은 큰 차이가 없었으나 평균 완전미율은 전북 우수브랜드 쌀 95.3%, 전북 외 우수브랜드 쌀 94.2% 전북일반브랜드 쌀 89.1%였으며 전북우수브랜드 쌀과 전북 외 우수 브랜드 쌀은 동등한 품질을 나타내었다. 3. 국내쌀과 수입쌀의 외관특성 비교에서 국내쌀의 장폭 비는 1.87로 미국산 수입쌀이나 태국산 수입쌀의 2.24, 3.33 보다 작았으며 수입(중국)쌀 장폭비는 1.84로 국내쌀과 같은 단립종의 특성을 나타내었다. 4. 국내쌀의 단백질함량은 6.2%로 미국산 수입쌀 6.1%와 비슷한 함량을 나타내었고 완전미 함량도 90%이상이었다. 5. 전분호화 특성을 알아 본 결과 최고점도는 중국산 찐 쌀이 가장 낮았고 치반점도, 최종점도 등은 태국산 수입쌀이 가장 높았다. 6. 국내쌀과 수입쌀을 비교한 취반특성은 취반미의 식미를 결정짓는 요인 중의 하나인 부착성(Ad)/경도(H)의 비가 국내쌀과 미국산 수입쌀이 높았으며 태국산 수입쌀이 가장 낮았다. 7. 국내쌀과 밥쌀용으로 국내에 유통된 수입쌀 비교에서 외형적 형태는 미국산 수입쌀과 차이가 났지만 품질은 동등하였고 중국산 수입쌀과 찐쌀의 품질과는 차이를 나타내었다.

월동 끝동매미충(Nephotettix cincticeps)의 약충태별 두폭크기 및 밀도변화 (Head Capsule Width and Population Densities of Overwintering Nymphal Stages of the Green Rice Leafhopper, Nephotettix cincticeps Uhler (Hemiptera: Cicadellidae))

  • 강석민;백채훈;이건휘;최만영;;황창연
    • 한국응용곤충학회지
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    • 제48권2호
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    • pp.165-170
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    • 2009
  • 본 연구는 월동하는 끝동매미충의 충태별 분포를 두폭측정법을 활용하여 분석하였다. 끝동매미충 1령, 2령, 3령, 4령 및 5령 약충에 대한 두폭크기는 각각 0.381, 0.502, 0.673, 0.879 및 1.128mm였으며, 변이계수는 5.3, 4.0, 3.0, 4.5 및 5.3%였다. 성장률은 2령, 3령, 4령 약충에서는 1.31${\sim}$1.34로 큰 차이가 없었지만 5령에서 1.28로 약간 감소하였다. 두폭측정값의 회귀식을 구한 결과, LogY = 1.4627+0.1192X($r^2=0.9993$)으로 고도의 유의성이 인정되었고, Dyar 공식에 의한 적합도는 98% 이상으로 매우 적합하였으며, Dyar 계수(K)는 1.316이었다. 월동하는 끝동매미충의 밀도 및 충태 변화를 조사한 결과, 2006년 1월 하순에 0.25 $m^2$ 당 195마리가 채집되어 밀도가 가장 높았고, 월동 충태 조사에서는 90% 이상이 4령 약충이었다. 3월 중순부터 5령 약충의 발생량이 증가하였고, 월동 후 첫 성충발생은 4월 상순이었다.

종가(宗家)의 고조리서를 통해본 병과류 연구 (A Study on the Recipe of Byung-Kwa-Ryu (Korean rice cake and cookie) in the Old Cookbooks of Jong-Ga (Head & Noble Family))

  • 권용석;김영;최정숙;이진영
    • 한국식생활문화학회지
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    • 제29권1호
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    • pp.61-83
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    • 2014
  • The aim of this study was to review Byung-Kwa-Ryu recipes in old cookbooks of the head & noble family (Jong-Ga). As for details and classification, we examined the materials and recipes of Byung-Kwa-Ryu. To accomplish this, old cookbooks of the head & noble family ("Soowoonjabbang", "Eumsikdimibang", "Onjubub", and "Jusiksiui") were reviewed. The introduced Byung-Kwa-Ryu recipes numbered 47 total; four from "Soowoonjabbang", 18 from "Eumsikdimibang", nine from "Onjubub", and 16 from "Jusiksiui". We classified the foods (Byung-Kwa_Ryu) into two categories, Tteok-Ryu (Korean rice cake) and Kwa-Jung-Ryu (Korean traditional cookie), on the basis of previous studies. These were further classified into 11 categories: Tteok-Ryu (Jjin-tteok, Salmeun-tteok, Chin-tteok, Jijin-tteok), Kwa-Jung-Ryu (Yumilkwa, Yukwa, Jeongkwa, Dasik, Kwapyun, Dang (Yeot), and others. The most common Byung-Kwa-Ryu type was Jjin-tteok in Tteok-Ryu (14). The next most common Byung-Kwa-Ryu types were Yukwa in Kwa-Jung-Ryu (6) and Yumilkwa in Kwa-Jung-Ryu (5).

경북산 유통 브랜드 쌀의 연차간 품질 변이 분석 (Annual Variation of Quality in Commercial Rice Produced in Gyeongbuk)

  • 원종건;박상구;안덕종;박소득
    • 한국작물학회지
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    • 제51권3호
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    • pp.227-232
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    • 2006
  • 본 시험은 브랜드 쌀의 연차가 변이와 품질 수준을 점검하고 지속적인 품질 평가를 통한 브랜드 쌀의 인지도를 높여 소비자의 신뢰를 확보하고자 시험을 실시하였으며 그 결과는 다음과 같다. 1. 본 시험기간중 기상은 2002년 9월 중순부터 기온이 많이 낮아졌으며, 2003년은 7월과 8월의 기상이 상대적으로 낮게 경과하였고, 일조시수 또한 적어 벼의 생육에 많은 영 향을 미쳤으나 2004년은 벼가 생육하기에 가장 적당한 기온을 보였다. 2. 도내 브랜드 쌀의 3개년간 분석 성적에서 완전미율이 CV가 1.9%로 브랜드간 변이가 가장 작았으며, 식미치 또한 4.2%로 변이는 적은 편이었다. 3. 완전미의 최하위와 최상위의 범위는 2003년도에서 가장 넓게 나타났으며 그에 따라 평균 완전미율 또한 가장 낮게 나타났다. 4. 평균 단백질 함량이 2003년에 8.0%으로 2004년에 7.0%에 비해 약 1.0%정도 높았으며, 특히 2004년의 경우 단백질 함량이 7.0% 이하인 브랜드가 65.4%를 차지하고 있어 감비재배의 효과와 등숙에 알맞은 기상의 영향을 많이 받았던 것으로 사료된다. 5. 기상이 양호했던 2004년에는 심복백미 비율이 $0.3{\sim}5.9%$였고 평균 2.8%로 이상 기온 현상이 있었던 2003년의 절반 정도로 감소되었다. 심복백미 비율이 3% 이상 되는 브랜드 수 또한 2003년에 73.6%를 차지해, 2002년의 53.2%와 2004년의 46.2%에 비해 높아서 외관상 품위를 떨어뜨리는 가장 큰 요인으로 작용하였다. 6. 연도별 식미치는 완전미 비율이 가장 높았고, 단백질 함량이 가장 낮았던 2004년도에서 평균 77.0으로 가장 높았고, 그와 반대로 완전미 비율도 낮았고, 단백질 함량이 가장 높게 나타났던 2003년도에 71.0으로 낮았다.