• Title/Summary/Keyword: Rapid growth

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중국 수산물 소비구조와 전망 (Consumption Structure and Prospects of Seafood in China)

  • 구 특력근백을
    • 수산경영론집
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    • 제37권3호
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    • pp.109-130
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    • 2006
  • Rapid economic development has led seafood consumption to its quality - oriented pattern as well as consumer's in China. This study concerns about The First, China is Seafood development background. The Second, China become emboldened seafood causes. The third, seafood consumption has characteristic. The fourth, seafood consumption has the organization of society. The study shows that there are economic developmental periods Chinas has three time. The First time$(1961\sim1983)$ is rapid growth. The Second time$(1984\sim1998)$ is growth accumulate. The third time$(1999\sim)$ is changing on seafood consumption as the consumption of seafood is changed according to economic variables changes in income, price, tastes and population. This changing pattern of seafood consumption is based on economic variables appears toward luxury and convenience seafoods. Consumption of food is also affected by non - economic variables. The most typical non - economic variables leading to changes of seafood consumption is local, seafood culture, $et{\ldots}$ Recently seafood consumption pattern shows that consumers paying more money to get their seafood preference for pursuing its hight growth and varienty.

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An advanced single-particle model for C3S hydration - validating the statistical independence of model parameters

  • Biernacki, Joseph J.;Gottapu, Manohar
    • Computers and Concrete
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    • 제15권6호
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    • pp.989-999
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    • 2015
  • An advanced continuum-based multi-physical single particle model was recently introduce for the hydration of tricalcium silicate ($C_3S$). In this model, the dissolution and the precipitation events are modeled as two different yet simultaneous chemical reactions. Product precipitation involves a nucleation and growth mechanism wherein nucleation is assumed to happen only at the surface of the unreacted core and product growth is characterized via a two-step densification mechanism having rapid growth of a low density initial product followed by slow densification. Although this modeling strategy has been shown to nicely mimic all stages of $C_3S$ hydration - dissolution, dormancy (induction), the onset of rapid hydration, the transition to slow hydration and prolonged reaction - the major criticism is that many adjustable parameters are required. If formulated correctly, however, the model parameters are shown here to be statistically independent and significant.

RTA를 이용한 Cobalt Silicide의 형성 및 Growth Rate d에 관한 연구 ("A Study on the formation of Cobalt Silicide and its Growth Rate by Rapid Thermal Annealing(RTA)")

  • 강유석;김효완;황호정
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 1988년도 전기.전자공학 학술대회 논문집
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    • pp.387-390
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    • 1988
  • The increases in the packing density and the resulting shrinkage of silicon integrated circuit dimensions led to the investigation and successful of the deposited silicide layers as the gate and interconnection and contact metallization. In this paper evaporated Co films on n-Si have been rapid thermal annealed in $N_2$ambient at temperature of $400^{\circ}C-1000^{\circ}C$. The Co silicide formation is characterized by sheet resistance (4PP). Also, silicide growth rate and its reproductivity has been examined by SEM.

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실리콘과 카본을 이용한 다공질 탄화규소의 제조와 기계적 특성 (Fabrication and Mechanical Properties of Porous Silicon Carbide Ceramics from Silicon and Carbon Mixture)

  • 김종찬;이은주;김득중
    • 한국세라믹학회지
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    • 제50권6호
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    • pp.429-433
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    • 2013
  • Silicon, carbon, and B4C powders were used as raw materials for the fabrication of porous SiC. ${\beta}$-SiC was synthesized at $1500^{\circ}C$ in an Ar atmosphere from a silicon and carbon mixture. The synthesized powders were pressed into disk shapes and then heated at $2100^{\circ}C$. ${\beta}$-SiC particles transformed to ${\alpha}$-SiC at over $1900^{\circ}C$, and rapid grain growth of ${\alpha}$-SiC subsequently occurred and a porous structure with elongated plate-type grains was formed. The mechanism of this rapid grain growth is thought to be an evaporation-condensation reaction. The mechanical properties of the fabricated porous SiC were investigated and discussed.

실리콘을 함유한 미니밀 소재의 용융아연도금성에 미치는 니켈첨가의 영향 (Effect of Nickel Addition in Hot Dip Galvanizing of Mini-mill Steels Containing Silicon)

  • 이호종;김종상;정진환
    • 한국표면공학회지
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    • 제32권2호
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    • pp.157-164
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    • 1999
  • In this study the effect of nickel addition on the coating weight of mini-mill steels containing silicon has been studied. It is shown that the pure zinc accelerated growth of the alloy layers occurred by a rapid growth of the zeta phase at 0.06%Si. The addition of 0.06%Ni to a pure zinc bath was found to be very effective in reducing the coating weight and promoting preferential development of the delta phase. The coating obtained by immersion in the Zn-Ni bath shows the presence of a nickel-rich region between the zeta phase and the eta phase. It is suggested that nickel prevents the rapid growth of the zeta phase due to the formation of the Zn-Ni-Fe ternary compound, which may act as a barrier to inward diffusion of zinc or iron at the zeta-eta boundary.

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Leuconostoc oenos의 생장률에 대한 사과산의 촉진 작용 (Malate Stimulation on Growth Rate of Leuconostoc oenos)

  • 이수오;박무영
    • 한국미생물·생명공학회지
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    • 제8권4호
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    • pp.221-227
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    • 1980
  • 포도당을 포함한 생장 배지속에 L-사과산을 첨가하면 Leuconostoc oenos균들의 생장률을 크게 촉진 시켰다. L-사과산은 동시에 C-젖산탈수소 효소(D-LDH)의 합성과 활성도를 촉진시켜 포도당에서 D-젖산의 생산을 빠르게 하였다. L-사과산 존재 하에서 이렇게 빨라진 포도당의 이용이 leuconostoc 균들의 생장률을 촉진시키는 것 같다.

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강화 남부 조간대에 서식하는 칠면초(Suaeda japonica)의 연간 생장 및 생산 양상 (Growth Rate and Annual Production of Halo-phyte (Suaeda japonica) on Tidal Mud-flat, Southern Part of Ganghwa-Isl, Korea)

  • 황지원;이균우;박흥식
    • Ocean and Polar Research
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    • 제44권2호
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    • pp.127-137
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    • 2022
  • This study examined the growth pattern and environmental factors affecting the growth of the halophyte, Suaeda japonica, which is prevalent on tidal flats in the west coast of Korea in order to calculate annual carbon production. Quantitative sampling was conducted every month for three years from 2018 to 2020 on salt marshes located on the southern coast of Ganghwa Island. In terms of annual density affected by the germination rate at first period, especially when air temperature for winter time was constantly below 0℃ for long periods of time, germination decreased and precipitation in summer also exerted an influence. In terms of annual growth with regard to length, the part below the ground grew rapidly in the beginning after budding, while the part above ground grew at a relatively steady rate at all times. With regard to biomass, the part below the ground also increased from April in a manner similar to length growth, but decreased drastically from September with leaves falling off and water loss occurring. The part above ground showed a rapid increase from the beginning of the rainy season. Size-frequency distribution revealed broader patterns after the rainy season as individual growth varied, but from September, it stopped at all year. High growth rates were recorded in the initial phase of growth after budding and growth was rapid, but growth declined in summer when biomass increased. The annual mean production based on growth rate was calculated at 352 gDWt/m2/yr, and the highest production was 519 gDWt/m2/yr in 2018, but it has decreased since 2019. Annual carbon production was at calculated 143.41 gC/m2/yr for Suaeda japonica in the vicinity of the southern coast of Ganghwa Island.

농촌지역 국민학교 아동들의 체격측정치 (A study on physical growth of primary school student in the rural area)

  • 사공준;김석범;강복수;정종학
    • Journal of Yeungnam Medical Science
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    • 제7권1호
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    • pp.51-60
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    • 1990
  • 농촌지역의 학령기 아동들의 체격 발달현황을 파악하기 위하여 안강읍내 1개 국민학교의 남자 469명, 여자 454명을 대상으로 신장, 체중, 흉위 및 좌고의 4개 항목을 계측하여 집계하고 R$\ddot{o}$hrer지수를 산출하였다. 신장은 남녀 모두 직선상의 증가를 보였으며 연간 최대 성장연령은 남녀 모두 10~11세, 남녀의 교차연령은 9~11세였다. 체중의 최대 발육연령은 남녀 모두 10~11세로 나타났으며 남녀교차연령은 신장과 같은 9~11세였다. 흉위는 남학생의 경우 전 연령에 걸쳐 비교적 완만하고 직선적인 증가를 보이는 반면 여학생의 경우 10~11세 사이에서 급격한 발육증가를 나타내면서 남학생과 교차하여 상회하였다. 좌고의 경우 연간 최대 성장연령은 역시 10~11세였으며 9~10세 사이에 남녀가 교차하였다. R$\ddot{o}$hrer지수는 남자 1.17~1.30, 여학생이 1.15~1.29로 나타났으며 대체로 남학생이 여학생보다 높았고 남녀 모두 연령의 증가와 함께 지수의 감소를 나타내었다.

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급속광조형 마스터 모델을 이용한 제품 및 간이 금형 제작 (Fabrication of Mold and Part by Using SLA Master Models)

  • 박문선;김대환;강범수
    • 한국정밀공학회지
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    • 제16권12호
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    • pp.7-13
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    • 1999
  • The potential for growth and the future impact of Rapid Prototyping that it will have on the product development cycle are enormous. Since making tools, precedes making parts, Rapid Tooling becomes widely used in automobile, aerospace, electronic, and other industries. In this study, master models formed by Rapid Prototyping of Stereolithography have been applied for vacuum casting to obtain silicone patterns which have transformed into epoxy models. The epoxy models have been measured to check dimension errors, and tested their functions. These checking and measurement have provided information on plastic injection possibilities and data for die design, Temporary die making with the materials of Aluminum/Epoxy and powder injection metal (PIM) has also been discussed in terms of hardness, surface roughness, and SEM microstructures.

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Development of Predictive Growth Models for Staphylococcus aureus and Bacillus cereus on Various Food Matrices Consisting of Ready-to-Eat (RTE) Foods

  • Kang, Kyung-Ah;Kim, Yoo-Won;Yoon, Ki-Sun
    • 한국축산식품학회지
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    • 제30권5호
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    • pp.730-738
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    • 2010
  • We developed predictive growth models for Staphylococcus aureus and Bacillus cereus on various food matrices consisting primarily of ready-to-eat (RTE) foods. A cocktail of three S. aureus strains, producing enterotoxins A, C, and D, or a B. cereus strain, were inoculated on sliced bread, cooked rice, boiled Chinese noodles, boiled bean sprouts, tofu, baked fish, smoked chicken, and baked hamburger patties at an initial concentration of 3 log CFU/g and stored at 8, 10, 13, 17, 24, and $30^{\circ}C$. Growth kinetic parameters were determined by the Gompertz equation. The square-root and Davey models were used to determine specific growth rate and lag time values, respectively, as a function of temperature. Model performance was evaluated based on bias and accuracy factors. S. aureus and B. cereus growth were most delayed on sliced bread. Overall, S. aureus growth was significantly (p<0.05) more rapid on animal protein foods than carbohydrate-based foods and vegetable protein foods. The fastest growth of S. aureus was observed on smoked chicken. B. cereus growth was not observed at 8 and $10^{\circ}C$. B. cereus growth was significantly (p<0.05) more rapid on vegetable protein foods than on carbohydrate-based foods. The secondary models developed in this study showed suitable performance for predicting the growth of S. aureus and B. cereus on various food matrices consisting of RTE foods.