• Title/Summary/Keyword: Seed growth

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Antimicrobial Activity of Trifoliate Orange (Poncirus trifoliate) Seed Extracts on Gram-Negative Food-borne Pathogens

  • Kim, Seong-Yeong;Shin, Kwang-Soon
    • Preventive Nutrition and Food Science
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    • v.17 no.3
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    • pp.228-233
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    • 2012
  • Trifoliate orange seed extracts (TSEs) were prepared from different solvents, water (TW), ethanol (TE), and n-hexane (TH), and assessed for their antimicrobial activities against six gram-negative food-borne pathogens (Escherichia coli KCTC 1039, Escherichia coli O157:H7 ATCC 43895, Salmonella Enteritidis ATCC 3311, Salmonella Typhimurium KCCM 11862, Shigella sonnei KCTC 2518, and Vibrio parahaemolyticus ATCC 17802). Among the tested TSEs, TE and TH showed a slight inhibition activity on V. parahaemolyticus ATCC 17802, but a good growth inhibition activity on Sal. Typhimurium KCCM 11862. TH and TE showed steady growth inhibition activity with increasing growth time after 6 hr when compared to the control (p<0.05). From these results, we confirmed the possibility of TH and TE as antimicrobial materials.

Effect of $\alpha-SiC $seed on microstructure and fracture toughness of pressureless-sintered $\beta-SiC$ ($\alpha-SiC $seed의 첨가가 상압소결된 $\beta-SiC$의 미세구조와 파괴인성에 미치는 영향)

  • Young-Wook Kim;Won-Joong Kim;Kyeong-Sik Cho;Heon -Jin Choi
    • Journal of the Korean Crystal Growth and Crystal Technology
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    • v.7 no.1
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    • pp.18-26
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    • 1997
  • $\beta-SiC $powder with or without the addition of 1 wt% of $\alpha-SiC$ particles (seeds) was pressureless-sintered at $1950^{\circ}C$ for 0.5, 2 and 4 h using $Y_3Al_5O_{12}$ (yttrium aluminum garnet, YAG) as a sintering aid. The introduction of $\alpha-SiC$ seeds into $\beta-SiC$ accelerated :he grain growth of elongated large grains during sintering, resulting in the coarser microstructure. The fracture toughnesses of materials with $\alpha$-SiC seeds and without $\alpha-SiC$ seeds sintered for 4 h were 7.5 and 6.1 $MPa\cdot \textrm m^{1/2}$, respectively. Higher fracture toughness of the material with seeds was due to the enhanced bridging by elongated grains, resulting from coarser microstructure.

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The Effects of the Seed Inoculation, Pelleting, and Liming on the Nodulation and Growth of Lucerne(Medicago sativa L.) (황갈색 고원 토양에 있어 근류균 접종, pellleting 및 석회시용이 Lucerne(Medicago sativa L.)의 근류형성 및 생육에 미치는 영향)

  • 임병기
    • KOREAN JOURNAL OF CROP SCIENCE
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    • v.10
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    • pp.79-83
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    • 1971
  • To investigate the effects of seed treatments and liming on nodulation and growth of lucerne(Medicago sativa L.) in an upland yellow-brown earth in N.Z. the five levels of seed treatments(Uninoculated, Inoculated, Inoculated plus lime pelleted, Inoculated plus 50/50 phosphate/dolmite pelleted, Inoculated plus ta1c pelleted), and 2 levels of lime applications (0, 25kg/10a) were compared and their interactions were observed, and then the following results were obtained. 1. In oder to obtain the effective nodulation of lucerne on acid soil it is usually necessary to apply lime and inoculate the seed. 2. The coating of inoculated lucerne seed with adequate materials will promote the nodulation. 3. The pelleting of lucerne seed may be a of reducing the need for the heavy liming. 4. The finely grounded lime was the best to use origin upland yellow-brown earth. 5. When the seed were not inoculated or pelleted with inferior material, liming is very effective for the nodulation and growth of lucerne. 6. The pelleting seed will reduce the laborious work and expenditure.

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Effect of Gibberellin Seed-Spray on Seedling Emergence and Growth in Dry-Seeded Rice (벼 건답직파재배에서 Gibbrellin의 종자분무처리가 출아 및 초장신장에 미치는 영향)

  • Kim, Je-Kyu;Lee, Moon-Hee;Oh, Yun-Jin
    • KOREAN JOURNAL OF CROP SCIENCE
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    • v.38 no.4
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    • pp.297-303
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    • 1993
  • Seedling emergence and .stand establishment in dry-seeded rice is unstable at present due to deep seeding, low temperature at seeding time, excessive drought or raining etc. This experiment was conducted to elucidate the effect of gibberellic acid(GA$_3$) on the seedling emergence and growth in dry-seeded rice. GA$_3$, IBA and Metalaxyl were treated by seed-soaking or-spray. Hwaseongbyeo, a japonica rice, was used. The seed-soaking treatment with GA$_3$ significantly increased the seedling emergence and plant height as compared with untreated seed. However, no difference was observed in IBA and Metalaxyl treatment. The optimum concentration of GA$_3$ to promote the seedling emergence and growth in dry-seeded rice was about 100ppm for seed-soaking and about 200ppm for seed-spray treatment. The seed-spray treatment of GA$_3$ with 200ppm promoted earlier and faster seedling emergence and elongated seedling height as compared with untreated seed.

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Seed Dormancy and Germination Characteristics of Annual Bluegrass (Poa annua L.) (새포아풀(Poa annua sp.)의 종자휴면과 발아특성)

  • 김태준;송재은;최정섭;조광연
    • Asian Journal of Turfgrass Science
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    • v.15 no.1
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    • pp.15-20
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    • 2001
  • Two types of annual bluegrass have been reported, and those consist of annual type (Poa annua ssp. annua) and perennial type (Poa annua ssp. reptans). As a weed, annual bluegrasses are commonly found in putting greens and fairways in many golf courses. Due to its strong competitiveness such as tremendous seed reproduction rate a year, prostrate growth habit, and no herbicide availability, annual bluegrasses have been considered as one of the most hard-to-control weeds in turf management systems. A growth chamber study was conducted to determine seed dormancy and to understand seed germination characteristics of annual bluegrass (Poa annua ssp. annua). Freshly harvested seeds showed 80 and 55% germination at 30 and $35^{\circ}C$, respectively, indicating that the optimum temperature of annual bluegrass is $30^{\circ}C$. However, the seed germination occurred only under light condition at any given temperature. This result demonstrated that light is prerequisite for the seed germination, and no primary dormancy of annual bluegrass seed exists. Secondary seed dormancy induced by unfavorable temperatures and dark condition was broken through 4 to 6 wk-storage at $4^{\circ}C$ with moisture, and the stored seeds germinated at $20^{\circ}C$ even under the dark. In red and far-red light trial, fresh seeds resulted in 40% germination under red while no seed germination occurred under far-red light condition, indicating that phytochrome Pr and Pfr could be related to annual bluegrass seed germination. When the far-red light replaced the red the germination was recovered, but this reversibility did not reach to the germination level under the red light only. This result implied that other lights than red and far-red would play an important role on seed germination of annual bluegrass.

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The effect of seeding on crystal growth of NaX zeolite (NaX zeolite의 결정성장에서 seed 첨가에 따른 영향)

  • 하종필;김익진
    • Journal of the Korean Crystal Growth and Crystal Technology
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    • v.9 no.1
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    • pp.6-13
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    • 1999
  • NaX zeolite crystal were grown from seed elements of synthetic NaX(2~3$\mu\textrm{m}$) Powder in a mother liquor having an approximate reactant composition ${4.12{Na}_{2}O{\cdot}{Al}_{2}{O}_{3}{\cdot}3.5{SiO}_{2}{\cdot}593{H}_{2}O$.The result was that crystallization time of NaX zeolite was reduced with adding seed materials to the initial mixture and crystal size was reduced . but with increasing crystallization time, NaX zeolite. In this study, We investigated detailed factors which NaX crystal has been determined by a combination of SEM, XRD, FT-IR, and BET.

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Crystal growing of NaX type zeolite

  • Ha, Jong-Pil;Seo, Dong-Nam;Jung, Mi-Jeong;Moon, In-Ho;Cho, Sang-Joon;Park, Hyun-Min;Kim, Ik-Jin
    • Journal of the Korean Crystal Growth and Crystal Technology
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    • v.9 no.4
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    • pp.371-376
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    • 1999
  • A large NaX type zeolite crystal of a uniform particle size of 20$\mu\textrm{m}$ are grown with various {{{{{H}_{2}O}}}} content by hydrothermal reaction and added seed crystal (2~3$\mu\textrm{m}$) to reactant solution as a function of different adding seed levels from 3 to 15%. The result that increased purity of NaX zeolite above 95% and homogeneity of crystal size by increasing adding seed levels, also decreased crystallization time. It was explained that adding seed to synthesis solution leaded out increase of surface area for physical contact reaction and directed growth of seed crystal, so more rapid consumption of reaction gel as increase seeding levels.

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Y2BaCuO4 Segregarion , a Possibility of Multi-Seeding and the Origin of Diagonal Line in YBa2Cu3O7-$\delta$ Superconductor Single Crystal (YBa_{2}Cu_{3}O_{7-\delta} 고온초전도체 단결정에서의 Y_{2}BaCuO_{5} 편석과 Multi-Seeding의 가능성, 대각선 흔적의 형성 원인)

  • 성현태
    • Progress in Superconductivity and Cryogenics
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    • v.1 no.1
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    • pp.1-6
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    • 1999
  • The microstructures of top seed mult processde $\textrm{YBa}_2\textrm{Cu}_3\textrm{O}_7$.$\delta$ single crystal were studied. Although shape of the seed was not faceted. the growth shape of Y123 single crystal was faceted. It was observed that Y211 phases were trapped in specific spaces of the faceted region. From the microstructural investigation. it was suggested that the segregation of Y211 is due to the difference of growth rates in crystal direction. When a single crystal was grown by the single seed with stepped multi surfaces. a microstrue was grown from multi-seed. The microstructure show the possibility of multi-seed growth. Corn kernel like structure without Y211 phase was observed and seemed to be formed by the diffusion reaction between Y211 phase in crystal and liquid wetted on the crystal. the diagonal line on Y123 crystal was observed that it was formed by the corn kernel like structure.

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Effect of Deep Sea Water Seed Priming on the Growth of Rice (Oryza sativa L.) Seedlings

  • Yoon Byeong-Sung;Shrestha Surendra Lal;Kang Won-Hee
    • Korean Journal of Plant Resources
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    • v.19 no.6
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    • pp.687-691
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    • 2006
  • This experiment was conducted on rice (cv. 2005 Thaoi) seeds to study whether priming with deep sea water (DSW) results in enhancement of seed emergence and seedling growth and to identify the optimum concentration of Deep Sea Water (DSW) for priming. Two experiments were conducted subsequently. In experiment 1, four concentrations of the DSW (10%, 20%, 30% and 40%), and in experiment 2, five concentrations of DSW (10%, 15%, 20%, 25% and 30%) were prepared and seeds were primed for 24 hours duration at $25^{\circ}C$. Beside this, hydro priming with plain water was also included as a control. Experiments were laid out in Completely Randomized Design (CRD) with three replications. Result showed that 20% DSW seed priming treatment had improved the emergence, seedling height, number of roots and root length as compare to other with DSW or without DSW treatments. Beyond 20% DSW priming (i.e. 25%, 30% and 40%) were not suitable for priming the seed. On the basis of seedlings growth parameters; emergence, seedling height, root number and length, and shoot root ratio, 20% DSW priming was the best priming treatment.

Modified Cultivation Methods Improve Shelf-life and Quality of Soybean Sprouts, Effects of Treatment with Oak Charcoal and Citrus sunki Seed Extract

  • Oh, Young-Ju;Kim, Soo-Hyun
    • Preventive Nutrition and Food Science
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    • v.8 no.4
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    • pp.336-342
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    • 2003
  • The effects of cultivation methods (cultivation of curled-shaped type, M-1; conventional cultivation, M-2; growing after treatment with a growth regulator, M-3; cultivation by the combination of M-1 and treatment with oak charcoal, M-4) on the quality characteristics of soybean sprouts were studied by the measurement of growth characteristics. This study also investigated the changes in shelf-life stability of the new soybean sprouts (NSB) using M-4, which was cultivated with oak charcoal and treated with antimicrobial Citrus sunki seed extract. Among the soybean sprouts grown for six days at the high temperature and humidity environment (90$\pm$5% RH, 25$\pm$1$^{\circ}C$), M-1 revealed no significant difference in terms of quality, such as the harvest yield, the rot rate and the growth characteristics when compared with M-2. M-3 showed no significant difference in growth characteristics, of hardness, and sensory evaluation scores when compared with the soybean sprouts grown by conventional methods. NSB had a low number of total microorganisms and had a better appearance after five days of storage than did the control group (M-2). These findings demonstrate that chemical-free and clean soybean sprouts can be grown by combining oak charcoal and antimicrobial Citrus sunki seed extract, thereby meeting the consumer demand for safe, chemical free sprouts.