• Journal of Life Science
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• v.14 no.1
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• pp.126-130
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• 2004

This study was carred out to get the basic conditions for the mycelial growth of Morchella esculenta in shaking flask culture. The optimal temperature and initial pH of mycelial growth of Morchella escuzenta were 25$\pm$1$^{\circ}C$ and 6.5, respectively. The optimal medium was BG medium. Among the carbon sources tested, fructose was favorable for the mycelial growth and optimal fructose concentration was 5.0% (w/v). As nitrogen sources, peptone and NH$_4$Cl appeared to be favorable and optimal concentration was 4.0% [(w/v), ratio of 1:1].

• Journal of Life Science
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• v.13 no.4
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• pp.492-497
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• 2003

This study was carried out to get the basic data for the mycelial growth of Lentinus lepideus in liquid culture. The optimal temperature and initial pH of mycelial growth of Lentinus lepideus were $25^{\circ}C$ and pH 5.5, respectively. The optimal medium was YMG medium. Among the carbon sources tested, glucose was effected to the mycelial growth and optimal glucose concentration was 4% (w/v). As nitrogen sources, malt extract and yeast extract appeared to be favorable and optimal malt extract and yeast extract [ratio (w/w) of 1:1] concentration was 1.5% (w/v).

• Korean Journal of Soil Science and Fertilizer
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• v.49 no.6
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• pp.699-704
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• 2016

An estimation of optimal requirement of additional N by cropping pattern and growth stage is very important for greenhouse watermelon. The objectives of this study were to estimate an amount of optimal additional N based on growth, N uptake and yield of watermelon. In order to achieve these goals, we performed the study at farmer's greenhouse with a fertigation system and watermelon was cultivated three times (spring, summer and autumn) in 2015. The levels of additional N were set up with x0.5, x0.75, x1.0 and x1.5 of the $NO_3$-N-based soil-testing N supply for watermelon cultivation. The trends of growth and N uptake of watermelon markedly differed from cropping pattern; spring (sigmoid), summer and autumn (linear). The yield of watermelon was the highest at summer season and followed by autumn and spring. Also, the x1.5N showed a significantly higher yield compared to other N treatments. On the basis of growth, N uptake and yield of watermelon, we estimated an optimal level of additional N by cropping pattern and growth stage as follows; 1) spring (transplanting ~ 6 WAT : 6 ~ 14 WAT : 14 ~ harvest = 5 : 90 : 5%), summer (transplanting ~ 4 WAT : 4 ~ 8 WAT : 8 ~ harvest = 25 : 50 : 25%) and autumn (transplanting ~ 4 WAT : 4 ~ harvesting : 50 : 50%). In conclusion, nutrient management, especially N, based on cropping pattern and growth stage was effective for favorable growth and yield of watermelon.

• Journal of Life Science
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• v.14 no.4
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• pp.560-566
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• 2004

Agrocybe aegerita is Hymenomycetes fungus belonging to the order Agaricales and family of Bolbitiaceae. Much less is known about liquid culture of Agrocybe aegerita. Thus, the present study was to investigate the liquid cultural characteristics of Agrocybe aegerita my-celium. The optimal medium for the mycelial growth and density was ME medium, optimal tem-perature and initial pH were 25$\pm$1$^{\circ}C$ and 5.5, respectively. And optimal culture time for mycelial growth was 12 days. The modified optimal medium compositions were dextrin 3% (w/v), yeast extract 2% (w/w), MgSO$_4$0.05% (w/v), and KH$_2$PO$_4$0.15% (w/v). Under optimal culture conditions, the mycelial growth of modified optimal medium was higher than that of ME medium.

• Journal of Environmental Science International
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• v.6 no.5
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• pp.481-488
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• 1997

Microorganisms capable of degrading trlchloroethylene(TCEI using phenol as a induction substrate were isolated from industrial effluents and soil. The strain MS-64K which had the highest blodegradablllty was identified as the genus Micrococcus. The optimal conditions of medium for the growth and blodegadatlon of trlchloroethylene were observed as follows; the initial pH 7.0, trlchloroethylene 1, 000ppm as the carbon source, 0.2% ${(NH_4)}_2SO_4$, as the nitrogen source. respectively. Lag period and degradation time on optimal medium were shorter than those on Isolation medium. Growth on the optimal medium was Increased. Addition of 0.1% Triton X-100 Increased the growth rate of Micrococcus sp. MS-64K, but degradation was equal to optimal medium. Trlchloroethylene degradation by Micrococcus sp. MS-64K was shown to fit logarithmic model when the compound was added at initial concentration of 1, 000ppm.

• Proceedings of the Korean Reliability Society Conference
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• 2002.06a
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• pp.273-273
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• 2002

In this paper, we investigate a software release policy with software reliability growth factor during the warranty period by assuming that the software reliability growth is assumed to occur after the testing phase with probability p and the software reliability growth is not assumed to occur after the testing phase with probability 1-p. The optimal release policy to minimize the expected total software cost is discussed. Numerical examples are shown to illustrate the results of the optimal policy. And we consider a Bayesian decision theoretic approach to determine an optimal software release policy. This approach enables us to update our uncertainty when determining optimal software release time, When the failure time is Weibull distribution with uncertain parameters, a bayesian approach is established. Finally, numerical examples are presented for illustrative propose.

• Journal of Mushroom
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• v.3 no.1
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• pp.40-44
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• 2005

The results of examining selection of optimal mycelial growth condition excellent strain for determining the condition of Pleurotus cornucopiae are as follows. 1) Mycelial growth and density of P. cornucopiae were the highest in the medium of MCM(87.8mm/10d) followed by the order of PDA, YM, MEA and Czapek. 2) Optimal temperature for the mycelial growth and density of P. cornucopiae was shown to be $25^{\circ}C$, but the hyphae were dead at $5^{\circ}C$. The mycelial growth and density of KNAC2003 strain was the highest at $25^{\circ}C$(87.8mm/10d) followed by the order of 25, 30, 20, 35, 10 and $5^{\circ}C$. 3) Optimal pH for the mycelial growth and density was revealed to be 6.0(88.3mm/10d), but the mycelial growth and density were shown to be retarded in above or below pH 6.0.

• Clinical and Experimental Pediatrics
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• v.59 no.12
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• pp.466-470
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• 2016

Early, aggressive nutrition is an important contributing factor of long-term neurodevelopmental outcomes. To ensure optimal growth in premature infants, adequate protein intake and optimal protein/energy ratio should be emphasized rather than the overall energy intake. Minimal enteral nutrition should be initiated as soon as possible in the first days of life, and feeding advancement should be individualized according to the clinical course of the infant. During hospitalization, enteral nutrition with preterm formula and fortified human milk represent the best feeding practices for facilitating growth. After discharge, the enteral nutrition strategy should be individualized according to the infant's weight at discharge. Infants with suboptimal weight for their postconceptional age at discharge should receive supplementation with human milk fortifiers or nutrient-enriched feeding, and the enteral nutrition strategy should be reviewed and modified continuously to achieve the target growth parameters.

• Korean Journal of Plant Resources
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• v.11 no.1
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• pp.15-21
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• 1998

This study was carried out to determine the effects of plant growth regulators on cell culture and organogenesis from Sicyos angulatus L. using explants of leaves, stems and cotyledons. Optimal callus induction for S. angulatus was obtained on MS medium with 0.1mg/$\ell$ BA and 2.0mg/$\ell$ 2,4 -D from cotyledons, 0.1mg/$\ell$ BA and 5.0mg/$\ell$ NAA from leaves explants, Optimal media for subculture and growth of S. angulatus callus were 1/2 MS medium with 0.1mg/$\ell$ BA and 1.0mg/$\ell$ 2,4 -D for solid culture, and 0.1mg/$\ell$ 2,4-D for suspension culture. Many adventitious roots with some shoots were formed were formed from leaf and cotyledon explants of S. angulatus during callus induction with optimal combinations of plants growth regulators.

• Journal of the Korean Society for Precision Engineering
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• v.18 no.10
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• pp.116-126
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• 2001

This paper suggests a numerical method to find optimal geometric path and minimum-time motion for a spatial 6-link manipulator arm (PUMA 560 type). To find a minimum-time motion, the optimal geometric paths minimizing 2 different dynamic performance indices are searched first, and the minimum-time motions are searched on these optimal paths. In the algorithm to find optimal geometric paths, the objective functions (performance indices) are selected to minimize joint velocities, actuator forces or the combinations of them as well as to avoid one static obstacle. In the minimum-time algorithm the traveling time is expressed by the power series including 21 terms. The coefficients of the series are obtained using nonlinear programming to minimize the total traveling time subject to the constraints of velocity-dependent actuator forces.