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Study on Dry Matter Yields and Persistence of Forage Plants Using Swine Slurry in Fallow Paddy Land Located in the Mid-mountain Area (돈분액비를 시용한 중산간지 휴경답에서 다년생 목초의 초종별 영속성 및 건물생산성에 관한 연구)

  • Yoon, Sei Hyung;Kim, Sang Woo;Lim, Young Chul;Jung, Min Woong
    • Journal of The Korean Society of Grassland and Forage Science
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    • v.32 no.4
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    • pp.411-418
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    • 2012
  • This study was conducted to develop the technique for cultivation of forage crops using swine slurry in fallow paddy land located in the mid-mountain area (FPL). The field experiments were carried out from 2007 to 2009 on FPL at Kumsan, Chungbuk province in Korea. Swine slurry was prepared which decayed for 6 months. The experimental plots were consisted of seven treatments; tall fescue-based mixed pasture applied with chemical fertilizer (Control), mono-tall fescue pasture (MTF), tall fescue-based mixed pasture (TFBM), mono-Perennial ryegrass (MPR), mono-Italian ryegrass (MIR), mono-Red clover (MRC and mono), Reed canarygrass (MRCG) applied with swine slurry. The field of tall fescue-based pasture had been sown with a grasses mixture containing 'Fawn' tall fescue, 'potomac' orchardgrass, 'Reveille' Perennial ryegrass, and 'kenblue' Kentuky bluegrass, 'Kenland' Red clover. Seeding rates were 16, 6, 4, 2 and 2 (kg) per ha, respectively. DM yields of forages and rates of grass coverage were higher in MTF, TFBM and MRCG as compared with control treatment. This result means that FPL has contained with favorable conditions for growing grass, because forage productivity is more than 14.5 tons per ha per year in fallow paddy land. In addition, the farmer can save the trouble of repeated plowing and sowing every year, with the introduction of perennial grasses. The farmer must conduct the re-seeding and induce the improvement of management methods for the elevation of the persistence of red clover and perennial ryegrass, because both red clover and perennial ryegrass having high nutritive value and palatability was less persistent. Therefore, we suggest that FPL may be the good land for forage production utilizing swine slurry and swine slurry can be applied on FPL without any negative effects on DM production and the property of soil. FPL of Korea can be better utilized by applying swine slurry to the mono and/or mixed swards.

Nutrient Composition and Physicochemical Properties of Korean Taro Flours According to Cultivars (품종별 국내산 토란 분말의 영양성분 및 이화학적 특성)

  • Moon, Ji-Hye;Kim, Ro-Sa;Choi, Hee-Don;Kim, Yoon-Sook
    • Korean Journal of Food Science and Technology
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    • v.42 no.5
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    • pp.613-619
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    • 2010
  • Three varieties of taro flours (Altoran, Josaengjong, and Jaeraejong) were analyzed to evaluate their nutrient composition and physicochemical properties. Moisture contents of the three taro cultivars varied from 5.74-10.30%. Among the three cultivars, Altoran flour had higher protein and fat contents than other cultivars. There were 17 kinds of amino acids in the three taro flours. The major fatty acids in the three taro flours were linoleic acid (46.5-51.4%), palmitic acid (21.7-25.8%), and oleic acid (12.3-18.7%), and two thirds of the total fatty acids were unsaturated fatty acids. Potassium, phosphorus, magnesium, and calcium were the most plentiful minerals in the three taro flours, and the free sugars were glucose, fructose, and sucrose. The total dietary fiber contents of the three taro flours ranged from 12.97 to 17.60%. From these results, Altoran contained a high level of dietary fiber, minerals, essential amino acids, and free sugars. Jaeraejong showed the highest water absorption index. The water soluble index of Altoran was higher than that of the other cultivars. From the differential scanning calorimeter results, the gelatinization temperatures of the three taro flours were $84.98-89.91^{\circ}C$. The pasting temperature of the three taro flours was from 46.77 to $49.30^{\circ}C$ by rapid visco-analyzer. Among these varieties, Josaengjong had the highest peak viscosity and final viscosity, whereas Altoran had the lowest. These taro cultivars are expected to be potential material for application in taro processed foods, due to their gelatination and pasting properties.

Evaluation of time-dependent antimicrobial effect of sodium dichloroisocyanurate (NaDCC) on Enterococcus faecalis in the root canal (이염화이소시아뉼산나트륨 제재의 근관 내 사용 시 시간에 따른 E. faecalis에 대한 항균성 평가)

  • Kim, Hye-Jeong;Park, Se-Hee;Cho, Kyung-Mo;Kim, Jin-Woo
    • Restorative Dentistry and Endodontics
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    • v.32 no.2
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    • pp.121-129
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    • 2007
  • The purpose of this study was to assess the antibacterial effect of sodium dichloroisocyanurate (NaDCC), sodium hypochlorite (NaOCl), and chlorhexidine (CHX) on Enterococcus faecalis and to evaluate and to compare the time-dependant antimicrobial effect of NaDCC with NaOCl and CHX in the root canal in vitro before and after instrumentation. Extracted Human single teeth were prepared by serial instrumentation technique. The samples were autoclaved and contaminated for 3 days with E. faecalis monocultures. The teeth were then divided into 4 groups Each group was irrigated and inserted with 2% NaOCl, 2% NaDCC, 2% CHX and steri)ized saline. After 6, 12, 24, 72h, and 1 week incubation, sterilized paper point was inserted into the root canal. Paper points containing root canal contents were then placed on the agar plate. And then each root cana) was prepared with #4 and #5 GG (Gates-Glidden) drill. The debris were collected in the sterilized microtube and the plates were incubated at $37^{\circ}C$ in an increased $CO_2$ atmosphere. After 24h incubation the growth of bacteria around the paper points were measured. NaOCl and NaDCC solution shows similar antimicrobial effect for E. faecalis at 6, 12, 24, 72h and 1 week. In centrol group, irrigated with sterilized saline, no antimicrobial effect was observed. The results are in agreement with other investigators, who have shown the bactericidal property and possibility of NaDCC as a root canal irrigation solution. Thus it seems that NaDCC solutions can be clinically applied into the root canal within 1 week after dilution.

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

  • Son, Jong-Rok;Kim, Jae-Hyun;Lee, Jung-Il;Youn, Young-Hwan;Kim, Jae-Kyu;Hwang, Hung-Goo;Moon, Hun-Pal
    • KOREAN JOURNAL OF CROP SCIENCE
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    • v.47
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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.

Amount and Chemical Characteristics of the Epicuticular Waxes on Leaves at Active Tillering and Heading Stages of Rice Varieties (벼 품종들의 분얼성기 및 출수기의 엽표면Wax의 양 및 화학적 조성)

  • Yong Woong, Kwon;Bong Jin, Chung
    • KOREAN JOURNAL OF CROP SCIENCE
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    • v.37 no.2
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    • pp.185-197
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    • 1992
  • Differences in the amount and chemical characteristics of the epicuticular waxes on rice leaves were studied for the active tillering and heading stages of rice varieties differing widely in gross leaf-surface property and genetics. The amount of waxes on surfaces of rice leaf-blades was determined by extraction with chloroform and chemical composition of the waxes was characterized by thin layer chromatography, gas liquid chromatography and infrared spectrophotometry. The amount of waxes varied by variety and significantly with growth stage. The amount at the heading stage was 1.7 to 3.6 mg/g fresh weight of leaves, which was two to three times as much as that at the tillering stage of 0.8 to 1.8 mg/g fresh weight. The waxes consisted of seven chemical classes, namely diols, fatty acids, fatty alcohols, fatty aldehydes, fatty esters, saturated and unsaturated hydrocarbons. Diols and unsaturated hydrocarbons were identified as new chemical classes of the rice epicuticular waxes. The polar constituents such as dials, fatty acids and fatty alcohols and the non-polars such as fatty aldehydes, fatty esters, and saturated and unsaturated hydrocarbons were identified at the heading stage, but at the tillering stage only the non-polar compounds were identified. In the carbon numbers (C) of the chemical classes, diols were composed entirely of C30 and acids were mainly of C30 and C31. In alcohols, primary alcohols were composed of C13 and C32, and the secondary alcohols were of C14, C16 and / or C30 regardless of the rice varieties. The acid portion of fatty esters, mainly composed of C22 and C23, showed low cabon numbers compared with the aldehydes. The alcohol portion of them showed a wide distribution in carbon numbers from C13 to C26 depending on the rice varieties. Hydrocarbons had odd carbon numbers, consisting mainly of C29 and C31.

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A study on measures for the mitigation of fire damage in Korea super high-rise building through the improvement of domestic·foreign standards (국·내외 기준개선을 통한 국내 초고층 건축물의 화재피해경감 대책에 관한 연구)

  • Ko, Jaesun
    • Journal of the Society of Disaster Information
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    • v.13 no.2
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    • pp.233-248
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    • 2017
  • Uniform laws and regulations and reasonable design is necessary for the prevention of possible fire in super high-rise building. To this end, this study focused on super high-rise and massive building-related architectural review performance-based design (PBD) evaluation disaster impact assessment (DIA), and provided fire engineering measures for improving fire prevention on the basis of performance-based design by analyzing the buildings subject to these systems and problems in terms of contents. Above all, in the aspect of law and standard improvement, first, with regard to dual parts of two statutes though significant portion of them has the same contents in performance-based design (PBD) evaluation and disaster impact assessment (DIA), it is necessary to operate the systems after making them conform with each other and consolidating or abolishing them. Second, if it is impossible to consolidate or abolish performance-based design (PBD) evaluation and disaster impact assessment (DIA), the areas of contents of performance-based design (PBD) evaluation and disaster impact assessment (DIA) should be precisely classified and established. Next, engineering improvement measures against fire hazard in super high-rise building are as follows. First, it is necessary to revise the provisions of straight-run stairs in special escape stairs. And in case of installing a mechanical smoke exhaust system instead of smoke vent, sandwich pressurization used in the United Stated should be permitted. Second, with regard to smoke control system for special escape stairs, it was shown that there was necessity for revising the standards in order to enable air to be supplied according to section in case of fire, carrying out performance-based design, and the like from the early design stages to the completion stages. In the future, it is expected that an epoch-making contribution will be made to a decrease in casualties and property damage due to fire in case of super high-rise building where the results can be reflected after carrying out a study on maintenance and carrying out an additional study on other considerations of super high-rise building together with reflecting the improvement measures provided in the above-mentioned study.

Comparison of Chemical Composition, Physico-chemical Properties and Fatty Acid Composition of Horse Meat by Different Grade and Cuts (말고기의 육질 등급에 따른 부위별 일반성분, 이화학적 특성 및 지방산 성분 비교)

  • Cheong, Jin-Hyung;Sun, Chang-Wan;Hwang, Do-Yon;Kwon, Ki-Mun;Lee, Jae-Cheong;Kim, Hyo-Sun;Kim, Young-Jun;Lee, Sang-Kun;Ryu, Youn-Chul
    • Journal of Animal Science and Technology
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    • v.55 no.3
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    • pp.211-217
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    • 2013
  • The objective of this study was to investigate the physical and chemical composition, fatty acid profile and sensory property of horse meat according to meat quality grade (1 and 2) and cuts (loin, chuck roll and top round). The lipid content of loin was significantly higher (p<0.05) in grade 1 (4.65%) compared with grade 2 (2.31%), whereas moisture content was lower (p<0.05) in grade 1 than in grade 2. The pH value was significantly lower (p<0.05) in loin than in other cuts regardless of meat quality grade. Shear force value of loin was significantly different (p<0.05) between grades 1 (5.87 $kg/cm^2$) and 2 (10.86 $kg/cm^2$). Water-holding capacity values of loin, chuck roll and top round were not different (p>0.05) between grades 1 and 2. Meat color values ($L^*$, $a^*$ and $b^*$) of loin, chuck roll and top round were not different (p>0.05) between grades 1 and 2. Palmitoleic acid of loin in grade 1 (11.39%) was higher (p<0.05) than that in grade 2 (5.36%). Stearic acid of loin in grade 1(3.58%) was lower (p<0.05) than that in grade 2 (7.02%). Overall palatability of loin, chuck roll and top round did not differ (p>0.05) between grades 1 and 2. Therefore, meat quality grade had mainly affected lipid and moisture contents, shear force, palmitoleic acid and stearic acid of horse loin; and horse loin of grade 2 had lower pH and higher $L^*$, $a^*$ and $b^*$ than the other cuts.

Dry Matter Yield of Japanese Millet (Echinochloa crusgalli var. Frumentacea 〈Roxb.〉 Wight), Chemical Properties and Microbial Population of Soil as Affected by the Application of Fermented Sawdust Swine Manure in Cheju Volcanic Ash Soil Area (제주화산회토양에서 발효 톱밥 돈분 시용이 피의 건물수량, 토양의 이화학적 성질 및 토양 미생물에 미치는 영향)

  • Kim M. C.;Kim T. G.;Lee J. E.;Moon B. C.
    • Journal of The Korean Society of Grassland and Forage Science
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    • v.25 no.3
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    • pp.159-168
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    • 2005
  • This experiment was carried out during the period from May to October 1998 to determine the effect of fermented sawdust swine manure application (SSM) on the herbage production of Japanese millet and soil properties in the Cheju brown volcanic ash soil. The randomized block design (T1 : basic chemical fertilizer, N 200 kg/ha + $P_2O_5\;300 kg/ha+K_2O$ 200kg/ha ; T2 : 1/2 basic chemical fertilizer, N $100+P_2O_5\;150+K_2O$ 100kg/ha; T3 : 1/2 basic SSM, N 100kg/ha, T4:basic SSM, N 200kg/ha; T5:2 times basic SSM, N 400 kg/ha ; T6:4 times basic SSM, N 800 kg/ha) was used. At the same application level of nitrogen 200kg/ha, the application of $100\%$ chemical fertilizer (T1) had significantly lower dry matter yield than that of $50\%$ chemical fertilizer and $50\%$ SSM (T2) or $100\%$ SSM (T4)(p<0.01). Dry matter yield increased with an increase of SSM application to N 400kg/ha level but decreased at N 800 kg/ha level. P, K and Ca contents of Japanese millet tended towards to decrease with an increase of SSM level. The application of chemical fertilizer lowered P and K content of Japanese millet in comparison with that of SSM (p<0.05). pH, available phosphorus. exchangeable potassium, Ca and Mg content of soil studied showed a significant increase with an increase of SSM application level (p<0.05). However, at the same application level of N 200kg/ha, there was statistically no significant difference between chemical fertilizer and SSM in those contents of soil after experiment. The bacterial number of soil among microbial population increased with an increase of SSM level, in June, 1998 (p<0.05), but there was no regular tendency, in October. The rate of bacteria to fungus in soil had a tendency to decrease with an increase of SSM level. In conclusion, it is recommended to use N 400kg/ha of SSM or N 100 kg/ha of chemical fertilizer+N 100 kg/ha of SSM for Japanese millet.

Changes in the Physicochemical Properties and Sensory Characteristics of Burdock (Arctium lappa) During Repeated Steaming and Drying Procedures (증건 횟수에 따른 우엉의 이화학적 변화 및 관능적 특성 연구)

  • Lee, GeumYang;Son, YangJu;Jeon, YuHo;Kang, HeeJin;Hwang, InKyeoung
    • Korean Journal of Food Science and Technology
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    • v.47 no.3
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    • pp.336-344
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    • 2015
  • This study was conducted to investigate changes in the physicochemical, antioxidant, and sensory properties of burdock during 9 repeated rounds of steaming ($90^{\circ}C$, 3 h) and drying ($60^{\circ}C$, 20 h) procedures. The moisture content decreased from 81.95% to 7.64% as the process was repeated. Fresh burdock showed the highest total sugar content, with 518.35 mg/g of soluble sugar, 86% being inulin. The reducing sugar content was the greatest (377.00 mg/g) in burdock that had been processed 3 times. The brown color continuously intensified, reaching its peak at 7 rounds of processing, and then weakened. Crude saponin content was the highest (6.17%) after the 5th processing. Polyphenol content and antioxidant activity (DPPH, ABTS, FRAP) were the highest at the 3rd and 5th procedures, respectively. Repeated processing weakened the grass and root odors and the bitter, astringent, and metallic tastes, whereas it strengthened the sweet and savory odors, caramel flavor, and richness.

Evaluation of the Efficiency of E. coli O157: H7 Rapid Detection Kit using Immunochromatography (면역크로마토그래피를 이용한 E. coli O157: H7 신속검출 키트의 유효성 평가)

  • Kwak, Hyo-Sun;Lee, Dong-Ha;Moon, Hee-Sook;Park, Jong-Seok;Woo, Gun-Jo;Kim, Chang-Min
    • Journal of Food Hygiene and Safety
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    • v.18 no.3
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    • pp.118-124
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    • 2003
  • For the rapid detection of various pathogenic microorganisms from food sample, various kinds of kits have been developed and commercially available in the markets. With the advantages of speed, accuracy and easiness, the market of these kits has gradually increased for the QC and QA field of food company as well as testing facilities or laboratories. In this study, the characteristics such as the detection limit and the sensitivity of immunochromatographic type of rapid detection kit (Donga Co, Korea, D-kit) for E. coli 0157:H7 developed by monoclonal antibody were examined and also the possibility of application of the kit to food samples was evaluated. The reference kits used for comparison study were Reveal E. coli 0157:H7 (Neogen Co., USA, R-kit) and VIP EHEC kit (Biocontrol Inc., USA, V-kit) occupying major market share. In the detection limit test with the E. coli 0157:H7 reference, both R-kit and D-kit showed a distinct positive reaction in $10^4$/ml and weak positive reaction in $10^3$/ml, whereas V-kit showed a same reaction in 105/ml. Also, it was identified that the culture treated with heat showed more sensitivity than no heat treated culture. The sensitivity test was conducted against 22 isolates of E. coli 0157:H7, 7 strains of non-O157:H7 verotoxin-producing E. coli, 40 strains of E. coli with different O and H antigen type, and 38 strains of non-E. coli Enterobacteriaceae, and all of the test strains except three were showed exactly three were showed exactly the same reaction against three kinds of the tested kits. All the three kinds of kits showed a positive reaction against E. coli O157:H19, E. coli O148:H18 and Salmonella galinarium. We suppose that there might be a similarity in serological property between these three strains and O157:H7. From the test results, it can be concluded that there is (was) no difference between the D-kit developed in this study and R-kit or V-kit based on the detection limit and sensitivity.