• 제목/요약/키워드: growth condition

검색결과 4,811건 처리시간 0.037초

진공포장한 육류제품의 열가공처리와 포장재질에 따른 저장중의 미생물성장 효과 (Effect of Thermal Processing and Packaging Materials on Microbial Growth of Vacuum Packaged a Meat Product during Storage)

  • 이종현
    • 한국포장학회지
    • /
    • 제4권1호
    • /
    • pp.33-40
    • /
    • 1997
  • The microbial growth of fresh, vacuum packaged, cook-in-bag uncured beef patties was determined in two film structures, a commercial (PE/EVOH), and super barrier ($SiO_2$ coated polyester) material. Packaged samples were cooked to internal temperature of 71 and $82^{\circ}C$ for 30 minutes, and stored in temperature abused ($23{\pm}2^{\circ}C$) and refrigerated storage ($4-6^{\circ}C$). Barrier properties had a significant effect (p<0.001) on aerobic and mesophilic growth in the abused condition. Cooking temperatures had a statistically significant effect (p<0.05) on aerobic growth in the refrigerated condition. The growth of anaerobes and psychrophiles were not significantly effected by either variables. Storage times had the most significant effect (p<0.001) for all groups of microorganisms. The physical properties of the commercial film (strength, thickness, and shrinkage) were changed after exposure to thermal treatment, while the super barrier package had actually no change.

  • PDF

Growth Simulation of Ilpumbyeo under Korean Environment Using ORYZA2000: I. Estimation of Genetic Coefficients

  • Lee Chung-Kuen;Shin Jae-Hoon;Shin Jin-Chul;Kim Duk-Su;Choi Kyung-Jin
    • 한국작물학회:학술대회논문집
    • /
    • 한국작물학회 2004년도 춘계 학술대회지
    • /
    • pp.100-101
    • /
    • 2004
  • [ $\bigcirc$ ] In the growth simulation using genetic coefficients calculated with fooled data under various condition, WAGT was not higher and LAI, WLVG, WSO were higher, but WST was similar before grain-filling stage after the became lower because of higher translocation of carbohydrates than in the growth simulation using genetic coefficients calculated with data under high nitrogen applicated condition. $\bigcirc$ Genetic coefficients should be calculated with data showing potential in ORYZA2000, but under 180 kg and 240 kg N condition in 2003, plants were infected by panicle blast and also yield was not higher than under 120 kg N condition showing not potential condition and therefore not appropriate for genetic coefficients estimation compared with pooled data from various condition.

  • PDF

청계천 이팝나무 가로수 생육환경이 성장에 미치는 영향 (Effect on the Growth Condition of Chionanthus retusa, Roadside Tree in Cheongyechon)

  • 윤소원
    • 한국환경복원기술학회지
    • /
    • 제11권3호
    • /
    • pp.129-138
    • /
    • 2008
  • This study was carried out to examine the growth condition of Chionanthus retusa, roadside tree in Cheongyechon (CGC) and to investigate the relationship soil characteristics and tree vitality and chlorophyll contents of it. Growth condition of tree (condition of flower, leaves and branch, % of flowering, height, diameter at breast height, width, vitality and chlorophyll contents) and physiochemical relation item (pH, organic matter, K, Mg, Na, Ca, P) were investigated. The result are as follows : 1. The growth condition of flower, leaves and branch in the left side of CGC is better than the right side since the quantity of sunshine of left side of CGC is much more than the right side. 2. The average pH was alkaline. P and organic contents were much lower than the standards. 3. Tree vitality and chlorophyll contents were bad where were high user density and high buildings, such as 1, 2 area near Jong-gak and jongro 3 ga. Among the physiochemical factors of soil which affect tree vitality, K and P were found to be the main factors. Therefore, in order to improve the growth environment of roadside tree in CGC, it is needed to do periodical soil fertilizing and improve physical characteristics of soil such as, permeability and porosity by soil conditioner.

광독립영양 기내 미세증식 시스템에서 생육단계별 환경조절을 통한 감자의 기내 및 기외 생육과 에너지 효율 향상 (Improvement of Growth of Potato (Solanum tuberosum L. cv. Dejima) Plants at In Vitro and Ex Vitro and Energy Efficiency by Environmental Control with Growth Stage in Photoautotrophic Micropropagation System)

  • 오명민;이훈;손정익
    • 생물환경조절학회지
    • /
    • 제18권1호
    • /
    • pp.23-28
    • /
    • 2009
  • 이전 실험에서 결정된 생육 단계별 최적 환경조건을 평가하기 위한 4가지 처리는 다음과 같았다: 생육 단계별 최적 환경 조건을 사용한 광독립 영양배양(photoautotrophic optimum condition with growth stage (POG)), 생육 단계별 평균 광합성 광량자속 밀도(photosynthetic photon flux density(PPFD))와 $CO_2$ 농도를 사용한 광독립 영양배양(photoautotrophic constant condition with average PPFD and $CO_2$ of POG(PCA)), 생육 단계별 최대 PPFD와 $CO_2$농도를 사용한 광독립 영양배양(photoautotrophic constant condition with maximum PPFD and $CO_2$ of POG(PCM)) 그리고 대조군으로 3%의 당을 포함한 광혼합 영양배양(photomixotrophic conventional condition with 3% sucrose(PMC)). 실험 결과 각 생육 단계별 환경제어(POG)는 기내에서 배양된 감자 소식물체의 모든 생육 관련 항목에서 유의적 증진을 유도하였다. 또한 단위 건물중 당 소비된 전력과 $CO_2$는 모든 처리 중 POG에서 가장 낮았다. 기외 이식 이후에도 POG에서 생산된 감자 묘는 PMC에서 자란 감자 묘와 전체적으로 큰 차이 없이 왕성한 생육을 유지하였다. 특히 POC는 기존 광혼합 영양방식(PCM)과 비교했을 때 기외 이식전과 이식 후 20일째 각각 4.7배와 3.8배 높은 건물중을 기록하였다. 따라서 POG와 같은 생육 단계별 환경 조절을 통한 광독립 영양 미세 증식 방법은 에너지 절감 효과와 함께 무균의 건강한 감자 묘의 생산에 효과적이었다.

Cymbidium goeringii 종자의 in vitro 에서의 발아에 관한 기초적 연구 (Study on Germination of Seed and Growth of Rhizome in Cymbidium goerinii in vitro)

  • 윤의수
    • 한국자원식물학회지
    • /
    • 제2권1호
    • /
    • pp.235-241
    • /
    • 1989
  • The study was conducted to determine the Ms orthogonaL modia and the concentration of plant growth regulator for seed matura-tion and growth of rhizome from Cymbidium goeringii Germination waswell in dark condition, but the growth of rhizome was better un-der dark than under light condition in MS orthoTonal . Sucrose con-centration( 3 %) gave better results than higher ones(6%), andthe use of NAA(0.1 PPm) effect significant difference of seed ge-rmination .But the growth of rhizome was best in medium Containingsucrose concentration(3%) Ippm NAA and 1 PPm BA.

  • PDF

Growth Simulation of Ilpumbyeo under Korean Environment Using ORYZA2000: II Growth Simulation by New Genetic Coefficients

  • Lee Chung-Kuen;Shin Jae-Hoon;Shin Jin-Chul;Kim Duk-Su;Choi Kyung-Jin
    • 한국작물학회:학술대회논문집
    • /
    • 한국작물학회 2004년도 춘계 학술대회지
    • /
    • pp.102-103
    • /
    • 2004
  • [ $\bigcirc$ ] In the growth simulation without changing of module with ORYZA2000, dry matter, LAI and leaf nitrogen content(FNLV) were estimated well under high nitrogen applicated condition, but overestimated under low nitrogen applicated condition. $\bigcirc$ Nitrogen stress factor on the SLA was introduced into ORYZA2000 because especially overestimated LAI under low nitrogen applicated condition was originated from SLA decrease with leaf nitrogen(FNLV) decrease. $\bigcirc$ In the growth simulation with modified SLA modified module, LAI was estimated well under even low nitrogen applicated condition, but dry matter was hardly changed compared with default. $\bigcirc$ Simulated plant nitrogen content and dry matter have no clear difference between modules, but compared with observed values, panicle weight(WSO) and rough rice yield(WRR14) were overestimated under high nitrogen applicated because of lodging, pest, disease and low nitrogen use efficiency.

  • PDF

Halobacterium halobium 의 생육조건 및 Protease 에 관한 연구 (A Study on Growth Condition and Proteolytic Enzyme of Halobacterium halobium)

  • 민윤식
    • 한국식품영양과학회지
    • /
    • 제23권5호
    • /
    • pp.856-862
    • /
    • 1994
  • In salt-preserved foods of every kinds, it was examined the growth condition of halophilic bacteria that induced a change of colour, taste, nutritive substance, a production condition of enzyme and a character of crude enzyme. Used bacteria is H. halobium a kind of extremely halophilic bacteria, and the required of optimum culture needed a quite long time of crude enzyme production is 168 hours. Optimum pH is about 7-7.5, so the traditional food of such neutrality pH as soybean paste and soy sauce particularly come into trouble because the growth can flourish in neutrality or alkaliescence, and the crude enzyme also appeared that best activation between pH 6 and pH 8. The optimum temperature is about 37$^{\circ}C$, the optimum temperature of enzyme is about 40 $^{\circ}C$ and the temperature stability is settled for 15 minutes and it is completely inactivated at 10 minutes. In the influence of each metal ion, Fe++ and Mn++ a stimulated the growth of H.halobium and the activation of enzyme, Cu++ and Zn++ were identified that made the growth and the activation of enzyme inhibit.

  • PDF

Effects of light and nutrient on flower formation and vegetative growth of Viola collina

  • Park, Hyekyung;Son, Ga-yeon;Kim, Jae Geun
    • Journal of Ecology and Environment
    • /
    • 제46권3호
    • /
    • pp.243-249
    • /
    • 2022
  • Background: Mixed breeding herb Viola collina Besser, which produces both chasmogamous and cleistogamous flower, has limited habitats under closed canopy and short and early flowering timing, making it relatively more vulnerable to climate change. To better understand the effect of light and nutrient on the flower formation and vegetative growth of V. collina, a mesocosm experiment was conducted. Two-by-two factorial treatments of two light conditions (100% and 60% of natural light) and two fertilizer treatment conditions (fertilized and not fertilized) were applied in the mesocosm experiment. Results: The number of flowers, including chamogamous and cleistogamous flowers, was highest (5.65/pot) under 60% light and fertilized condition and lowest (1.41/pot) under 100% light and not-fertilized condition. However, above ground vegetative growth was highest (2.89 g/pot) under 100% light and fertilized condition and lowest (2.38 g/pot) under 60% light and not-fertilized condition. Above ground biomass to belowground biomass ratio was highest (1.50) under 60% light and fertilized condition and lowest (1.26) under 100% light and fertilized condition. Conclusions: This study showed that high light and nutrient are responsible for the vegetative growth, though the effect of fertilizer was reduced due to allocation and retainment of nutrients. In addition, the low light is necessary to make flowers, especially chasmogamous flowers.

한약투여가 소아의 성장에 미치는 영향 (The Effect of Herbal Medicine Treatment on the Growth of Children)

  • 정성민;김덕곤;이진용;조형준
    • 대한한방소아과학회지
    • /
    • 제18권2호
    • /
    • pp.119-126
    • /
    • 2004
  • Objective : We used herbal medicine to treat various disease and also to keep good general condition of children. We aimed to evaluate the effect of herbal medicine on the growth of children treated with herbal medicine. Method: We studied 187 children who visited the department of Pediatrics, KyungHee Oriental Medical Hospital from March 2004 to August 2004. They meet condition as follows; they were treated for more than 6 months and they visited our clinic more than 3 times. Whenever patients visited our hospital, we measured their height, body weight and obesity degree using DS-102(dszenix, Seoul). We measured height percentile of first time visit, and that of last time visit. And we compared them using the Growth Statistics Curve made by the Korean Association of Pediatrics, 1998. Results : The mean growth of total children showed 4.04 percentile upwardly; the growth- up percentile of boys was 4.52 and that of girls was 3.26. Analysis according to disease resulted as follows; children with respiratory disease showed 10.29 percentile growth-up, digestive disease 4.21percentile, urinary disease 4 percentile, allergic disease 2.65 percentile, weak children 2.52 percentile and other disease 3.19 percentile. Conclusion : Herbal medical treatment helped growth not only in children who took medicine for growth retardation problem but children with various disease. Moreover herbal medical treatment applied to keep good general condition of children also gave positive effect on the growth of children.

  • PDF

고체의 전도를 포함한 기포성장의 복합적 해석 (Conjugate Analysis of Bubble Growth Involving Conduction in Solid)

  • 손기헌
    • 대한기계학회논문집B
    • /
    • 제27권2호
    • /
    • pp.265-273
    • /
    • 2003
  • Numerical analysis of bubble motion during nucleate boiling is performed by imposing a constant heat flux condition at the base of a heater which occurs in most of boiling experiments. The temporal and spatial variation of a solid surface temperature associated with the bubble growth and departure is investigated by solving a conjugate problem involving conduction in the solid. The vapor-liquid interface is tracked by a level set method which is modified to include the effects of phase change at the interface, contact angle at the wall and evaporative heat flux in a thin liquid micro-layer. Based on the numerical results, the bubble growth pattern and its interaction with the heating solid are discussed. Also, the effect of heating condition on the bubble growth under a micro-gravity condition is investigated.