• Title/Summary/Keyword: 시험포

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Effects of Gamma Irradiation on Pigments of Beef (감마선 조사가 한우육의 색소에 미치는 영향)

  • Yook, Hong-Sun;Lee, Ju-Woon;Lee, Kyong-Haeng;Kim, Sung;Byun, Myung-Woo
    • Korean Journal of Food Science and Technology
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    • v.30 no.5
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    • pp.1184-1188
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    • 1998
  • Effects of gamma irradiation on pigments of beef was investigated by determination of the Hunter's color values and pigments such as myoglobin, metmyoglobin and oxymyoglobin after gamma irradiation up to 5 kGy in air or vacuum package for 7 days. 'L' and 'b' values increased but 'a' value decreased with the elapse of the storage period. But, 'L', 'a' and 'b' values of irradiated beef were lower than non-irradiated beef. Myoglobin decreased but oxymyoglobin and metmyoglobin increased with the elapse of the storage period. Myoglobin decreased but oxymyoglobin and metmyoglobin increased with gamma irradiation up to 5 kGy. In regard to packaging methods, vacuum package did not affect pigment of the beef as did air package.

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Tensile Adhesive Chracteristics of Waterproofing System for Concrete Bridge Decks (교량 바닥판 조건에 따른 교면방수 시스템의 인장접착 특성)

  • Lee, Byung-Duck;Shim, Jae-Won;Park, Sung-Ki;Kim, Kwang-Woo
    • International Journal of Highway Engineering
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    • v.4 no.3 s.13
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    • pp.15-23
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    • 2002
  • The waterproofing system's performance is known to show a determing by complex interaction of material factors, design details, and the quality of construction, and the waterproofing integrity of waterproofing membranes is determined by the bond to the deck and the amount of damage to the waterproofing membrane. In this research, the basic properties of waterproofing membranes on market and the tensile adhesive chracteristics of waterproofing systems of concrete bridge deck have also been investigated in the view of the damages frequently reported from job site. For the tensile adhesive strength of sheet waterproofing membranes, the results after asphalt concrete paving tends to increase more than before those. The results of the liquid waterproofing membranes are upside-down, and the more concrete has strength, the more strength of tensile adhesive increase. The ambient temperature of asphalt concrete when application of the waterproofing membrane has considerable influence on the performance of waterproofing system. As described above, waterproofing system can be influenced by several factors. If they are not considered under construction, the overlooking will cause the damages of pavement and waterproofing system after traffic opening.

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Screening and Utilization of Allelopathic Plants for the Cultural Practice Improvement in Ginseng(Panax ginseng C.A. Meyer) (인삼재배법(人蔘栽培法) 개선(改善)을 위한 알레로파시 식물(植物) 탐색(探索) 및 이용)

  • Yang, K.J.;Kim, K.H.;Chung, I.M.
    • Korean Journal of Weed Science
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    • v.18 no.3
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    • pp.214-224
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    • 1998
  • This study was conducted to develop labor and chemical cultural practice improvement for weed control in ginseng field. Five crop species were screened in vitro and three crop extracts were sprayed in the test allelopathic effect for weed species. Methyl alcohol extracts of rice, oat, rye and wheat straw showed inhibitory effect on the germination of six weed species, Amaranthus retroflexus, Chenopodium album, Arthraxon hispidus, Digitaria adscendens, Echinochloa crus-galli, and Setaria viridis. Especially, extract of oat straw was most effective to inhibit the germination of six weed species tested. Also, spraying the extract solution of rice, rye and wheat straw was effective to inhibit the growth of weeds in ginseng field. Ginseng root length, diameter, fresh and dry weight in extract spraying plot were higher than those of non-treatment plot.

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Optimized Design of Air Controlling System in Air Defense Gun Systems of Wheeled Vehicle (차륜형 대공포의 냉방기 최적화 설계)

  • Jeon, Ki-Hyun;Lee, Boo-Hwan;Lee, Dong-Hee
    • Transactions of the Korean Society of Mechanical Engineers B
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    • v.37 no.11
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    • pp.1047-1051
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    • 2013
  • A modern combat vehicle needs to have a separate air-conditioning unit, although new combat systems tend to employ an integrated heating, cooling, and ventilating system. In this study, we investigated an air conditioning unit for an armored combat wheeled vehicle as a special use and military specification and performed a case study of a unique military combat vehicle. By using Fluent software, we tried to determine a suitable air ducting method and its location in the armored combat vehicle. The results show that an air-conditioning unit is one of the best solutions for wheeled vehicles that are not equipped with a cooling unit for their crews, and it can be applied to similar types of armored vehicles.

Heat Transfer Equation and Finite Element Analysis Considering Frozen Ground Condition the Cyclic Loading (지반의 동결조건을 고려한 열전도 구성방정식과 유한요소해석)

  • Kim, Young-Seok;Kang, Jae-Mo;Hong, Seung-Seo;Kim, Kwang-Jin
    • Journal of the Korean Geosynthetics Society
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    • v.9 no.3
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    • pp.39-45
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    • 2010
  • When the ground temperature drops below $0^{\circ}C$, wet soils expand due to the ice formation in their porous space. This results in frost heave which causes structural stability problems. Frost heave is attributed by several factors such as physical soil properties and heat transfer including pore water phase change. Due to the complex physical phenomena, reliable and verified multi-dimensional numerical models for frost heave problems are still in a research stage. This study presents an efficient and simple method of overcoming numerical problems associated with sudden jump of heat capacity due to the phase change from water to ice in the pore space. This paper proposes heat transfer equation and finite element method when the saturated soils or porous rocks are subjected to freezing. Numerical analyses using the proposed method agree well with the known closed form solution and the laboratory test results.

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Studies on in Vitro Culture of Rabbit Ova in Peritoneal Fluids (복수(腹水)에 의(依)한 가토난자(家兎卵子)의 체외배양(體外培養)에 관(關)한 연구(硏究))

  • Jeon, C.G.;Isijima, Yosiro
    • Korean Journal of Agricultural Science
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    • v.1 no.1
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    • pp.35-39
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    • 1974
  • This experiment was studied on the peritoneal fluid wden it was used for nutrient solution of fertilized ova of rabbit when it was cultivated in vitro. The peritoneal fluid also can be gained much from the superovulated rabbits. The results was follow. 1. Wden 2. 4. 8. cell stage ova of rabbit were cultivated in peritoneal fluid in peritoneal fluid at 37'c for 48 Ths, each ova was developed by 78.1, 83.3, 91.7, and 93.6%, and these records were superior to when the blood serum was used. 2. When 2cell stage ova of rabbit was cultivated in peritoneal fluid 88% of Ova were repidly growth Far morula stage and 24 became blastocyst stage these records are nearly same to the records in morulel blood sevium. 3. At these ponts the rabbit peritoneal fluid can be used effectively for on culture fluid.

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Atypical Cushing's Syndrome Associated with Sex Steroids Excess in a Dog (개에서 발생한 성호르몬 과다 분비와 관련된 비정형 부신피질기능 항진증)

  • Kim, Jun-Hwan;Hong, Yeon-Jung;Lee, Hyeon-Seok;Park, Jin-Ho;Park, Chul
    • Journal of Veterinary Clinics
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    • v.29 no.5
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    • pp.400-403
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    • 2012
  • A 10-year-old, intact male, toy poodle was presented with abdominal distension, truncal alopecia, hepatomegaly, and sustained elevation of alkaline phosphatase. Vacuolar hepatopathy and glycogen deposition in hepatocytes were confirmed by liver biopsy and ultrasound-guided fine-needle aspiration with periodic acid-Schiff (PAS) staining of mass lesion respectively. Cortisol and some sex hormones associated with adrenal gland were analyzed at IDEXX Reference Laboratories before and 1 hour after ACTH stimulation. The results of analysis confirmed elevation of some sex hormones including androstenedione, progesterone and 17 hydroxyprogesterone, not cortisol concentration, before and 1 hour after ACTH stimulation. The dog was diagnosed as atypical form of hyperadrenocorticism associated with sex steroids excess. The treatment was initiated with trilostane (0.5 mg/kg, PO, q12hr) that is an adrenal steroid synthesis inhibitor. Trilostane was administered for 8 weeks and the clinical sign including truncal alopecia was improved.

Biological Characteristics of Microsporum canis isolated from canine dermatophytosis (개 피부병 유래의 Microsporum canis의 생물학적 성상)

  • Han, Ki-ok;Choi, Won-pil
    • Korean Journal of Veterinary Research
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    • v.41 no.2
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    • pp.167-172
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    • 2001
  • The present study was conducted to examine morphological and biological characteristics of 57 strains of Microsporum canis isolated from 110 dogs with dermatophytosis in Taegu, 1999. Isolated strains of M canis were classified into 4 types(A: white-yellow type, B: fluffy type, C: flat type, D: radial groove type) according to their pigmentation and morphology of colonies with typical conidia and hyphae. Some strains of A and B type happened variation by subculture for 6~8 months. The variation strains were classified into 3 types(E, F, G), E type had aberrant macroconidia with typical macroconidia, F type had aberrant hyphae(like dumb-bell) and macroconidia, and G type had no conidia and racket hyphae. All strains showed positive urease test, rice medium growth test and hair perforation test.

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Impact Assessment of Liquid Manure Application on Soil and Shallow Groundwater in Poplar Experimental Site (액비 시비에 따른 포플러시험포 토양수 및 천층지하수 수질 영향 평가)

  • Hong, Eun-Mi;Choi, Jin-Yong;Nam, Won-Ho;Lee, Sang-Hyun;Yoo, Seung-Hwan
    • Journal of The Korean Society of Agricultural Engineers
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    • v.57 no.1
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    • pp.25-35
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    • 2015
  • As livestock manure treatment is becoming a problem, manure application in forest plantation is recommended as an alternative. In this study, to investigate the impact due to liquid manure application in forest plantation, soil, soil water and shallow groundwater quality had been monitored in poplar experimental site where the liquid manure (LM) was applied. Water samples were collected weekly during growing season (April to October) from 2008 to 2011. From the monitoring results, phosphorus concentration in the soil and soil water had no significant difference between LM and control plots. $NO_3$-N concentration of soil water in LM, however, showed higher concentration (13.6 mg/l at 40 cm, 35.1 mg/l at 80 cm) than control plot (1.5 mg/l at 40 cm, 0.5 mg/l at 80 cm). In case of shallow groundwater quality, pH, heavy metal, etc. were satisfied to the national agricultural water quality standard of groundwater and there were no significant difference between upstream and downstream. The $NO_3$-N concentration of shallow groundwater was also not exceeded the national drinking water standard. However, $NO_3$-N concentration in soil water and downstream of shallow groundwater had increased in 2011 when non-composted LM was applied mostly in non-growing season of tree (September). From the results, it is important to control nitrogen source, application time and decomposed or not when LM is applied. In addition, to investigate nitrate source, further long-term monitoring and modelling could be necessary.

Tissue Concentrations of Quercetin and Its Metabolite Isorhamnetin Following Oral Administration of Quercetin in Mice (Mouse에서의 quercetin 경구투여 후의 체내 농도 및 대사체 isorhamnetin의 농도변화)

  • Park, Kwan-Ha;Choo, Jong-Jae;Choi, Sun-Nam
    • Korean Journal of Food Science and Technology
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    • v.37 no.1
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    • pp.90-94
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    • 2005
  • Absorption, metabolism, and tissue concentrations of quercetin were examined and compared in mice and rats after oral administration of quercetin at 50 or 100 mg/kg. Quercetin was absorbed quickly in mice and reached maximum plasma concentration in I hr post-administration, and declined sharply after 4 hr. Plasma concentration of isorhamnetin, a major metabolite, also increased sharply, indicating rapid metabolic conversion, but elevated level was maintained longer than that of quercetin. Quercetin and isorhamnetin were found predominantly in glucuronide/sulfate-conjugate forms in both mice and rats. Tissue concentrations of quercetin and isorhamnetin in mice and rats were in the order of liver>kidney>spleen>plasma both 1 and 6 hr postadministration. These results show that quercetin is absorbed in mice after oral feeding and quickly metabolized into isorhamnetin as demonstrated in humans and other animal species. The results also can be used to explain various pharmacological activities reported in mouse models.