• Korean journal of food and cookery science
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• v.24 no.5
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• pp.691-698
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• 2008

In this study, we assessed the quality characteristics of soybean curds (tofu) prepared with Mesangi (Capsosiphon fulvescens) powder (0, 2, 4, 6%, w/w) were investigated. The yields of the curds containing Mesangi were higher than those of the control, and the yield increased with increasing quantities of Mesangi powder. The most abundant mineral in Mesangi tofu was calcium, followed by magnesium. The Mesangi tofu had a slightly lower pH than the control. The addition of Mesangi powder to curd evidenced a significantly lower L value (lightness) and a value (redness) than was detected in the control (p<0.05). The hardness level was highest in the tofu to which 2% Mesangi powder was added. However, this level decreased with increasing concentrations of Mesangi powder. Although the 4% Mesangi tofu evidenced higher adhesiveness than was detected in the control, we noted no significant differences among the Mesangi-treated curds. The soybean curds added to which 2% Mesangi powder was added had evidenced the highest level of cohesiveness, but the tofu containing 4 and 6% Mesangi powder was significantly reduced as compared with the control and 2% Mesangi tofu. Springiness, gumminess, and brittleness were higher in the 2% Mesangi tofu than in the others (p<0.05). The soybean curds prepared with Mesangi powder evidenced a lower total plate count than the controls during over 12 days of storage.

• Journal of the Korean Geotechnical Society
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• v.18 no.4
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• pp.33-43
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• 2002

Recently, as large constructions on the coast increase, an application of a surface layer stabilization method which is one of the improvement methods for dredged soft clay has increased. However, there are few studies about this. The purpose of this study is clarifying characteristics of ultra-soft marine clay and hardening agent. Also, it is verifying an optimal mixture ratio of hardening agent through the laboratory tests according to designed experiments and proving by statistical analysis and pilot tests. Laboratory tests were performed with proper hardening agent and test soil in accordance with the design of experiments. Regression equations between hardening agents materials and unconfined compressive strength were derived from the tests. The applicability of regression equations were also verified by pilot tests. From the test results, it was found that hardening agent materials(cement, slag, fly-ash, inorganic salts, arwin, gypsum etc.) have some effect upon compressive strength. The optimal mixture ratio which satisfies the required compressive strength was derived from the statistical analysis. The effect of ground improvement by cements and hardening agents was confirmed through the pilot tests. This study will suggest data for design or construction criteria of stabilization of surface layer on ultra-soft marine clay.

• Korean Journal of Soil Science and Fertilizer
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• v.23 no.3
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• pp.199-203
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• 1990

Effect of a trial compound fertilizer for raising rice seedling in tray, was tested on varieties of Chucheongbyeo and Taebekbyeo and on soil media pH of 6.4 and 5.4. The trial product increased dry weight, number of leaves, and ratio of dry weight to plant height and decreased damping-off incidence. The soil media pH of 6.4. applied trial product, maintained pH 4.0 to 5.4 for seedling period, but the soil media pH of 5.4 was too lower. The nitrogen uptake by rice seedling in the trial product plot was lower at 15 days after seeding compared to the control of straight fertilizer application, but it was higher and 35 days after seeding, resulting in optimum rice seedlings.

• Proceedings of the Korean Society of Postharvest Science and Technology of Agricultural Products Conference
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• 2003.04a
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• pp.121.2-122
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• 2003

다슬기분말(PSB)과 그 회분(ASB)으로 제조한 칼슘락테이트(PCaL 및 ACaL)를 0.5%씩 첨가한 반죽의 발효와 빵의 품질 및 저장성에 미치는 영향을 조사하였다. 반죽의 pH는 4.85~4.98로 ACaL.PCaL.대조군의 순으로 나타났다. 반죽의 부피와 빵의 loaf volume index는 대조군이 높았고 ACaL 첨가군이 낮았으며, pH를 5.50으로 조정하여 제조한 반죽의 부피와 빵의 loaf volume은 대조군과 큰 차이를 보이지 않았다. PCaL 및 ACaL을 첨가한 빵의 Ca함량은 29.4~29.7 mg/100 g-f.w로 대조군의 13.0 mg/100 g-f.w에 비하여 높았으며, 첨가군의 미량 무기질로 Mg, Fe, Zn이 0.03~0.98 mg/100 g-f.w 범위로 검출되었다. 빵의 L$^{*}$ 값은 대조군과 실험군의 유의적인 차이가 없었으며, a＊값, b＊값은 PCaL 첨가군이 가장 높아 황갈색을 띄었다. 빵의 hardness, gumminess는 대조군$^{\circ}C$ 실온에 두면서 저장한 결과 대조군은 3일째부터, ACaL 첨가군은 5일째부터, PCaL 첨가군은 6일째부터 곰팡이가 번식하였다.

• Food Science and Preservation
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• v.5 no.3
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• pp.262-269
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• 1998

In order to promote the applications of Korean loquat leaf as food, loquat leaf tea was manufactured and its physicochemical characteristics were examined. The contents of moisture, crude fat and ash of loquat leaf collected in the middle of February were lower than those collected in October. Mineral contents after 4 times of roasting loquat leaf between February and October were higher 39,916.8 ppm and 23,950.0 ppm of K, respectively. The contents of ascorbic acid(2.33%), free sugar(fructose 1.01%), tannin(1.63%) and caffein(113 mg%) were higher in October than those February. The chromaticity and absorbance of loquat leaf tea percolate were higher in 2 times of roasting but were lower 4 times of roasting in October than those in February. In free amino acid of its percolate and volatile component of 4 times of roasting leaf tea collected in October, DL-allohydroxylysine and nerolidol were higher, respectively.

• Food Science and Preservation
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• v.15 no.2
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• pp.214-218
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• 2008

In order to improve the quality of kochujang, sea tangle was added to deep sea water kochujang and their effects on component analysis and sensory evaluation were investigated for 90 days of fermentation. Crude protein, crude lipid and carbohydrate of deep sea water kochujang was higher than general kochujang. The content of potassium among the mineral in deep sea water kochujang was also presented higher than the general kochujang. Total amino acid contents were 16,608.8 ng/mg in deep sea water kochujang and 14,943.2 ng/mg in general kochujang. Content of oleic acid had the highest value at deep sea water kochujang. Sensory evaluation of showed that deep sea water kochujang were more aceeptable than general kochujang in the taste and overall acceptability.

• Journal of Soil and Groundwater Environment
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• v.12 no.5
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• pp.54-63
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• 2007

To examine the effects of amendments on heavy mineral oil degradation, a pilot scale experiment was conducted for over 105days. During the experiment, soil samples were collected and analyzed periodically for the determination of residual hydrocarbon and microbial activities. At the end of the experiment, the initial level of contamination ($6,205{\pm}173mgkg^{-1}$) was reduced by $33{\sim}45%$ in the amendment amended soil; whereas only 8% of the hydrocarbon was eliminated in the non-amended soil. Heavy mineral oil degradation was much faster and more complete in compost amended soils. Enhanced dissipation of heavy mineral oil in compost amended soil might be derived from increased microbial activities (respiration, microbial biomass-C) and soil enzyme activity(lipase, dehydrogenase, and FDA hydrolase) were strongly correlated with heavy mineral oil biodegradaton (P < 0.01).

• Journal of the Korea Academia-Industrial cooperation Society
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• v.17 no.2
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• pp.265-271
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• 2016

DEA is a typical method that allows measurements and evaluations of the efficiency. This study examined the management efficiency of bean farm households to suggest factors that influence the management efficiency. The results showed that a larger cultivation area has more positive effects on the scale efficiency of beans farm households. When summing up farmer's family labor, lease fee, hired labor cost, which are strongly related to the workforce, it reached up to 54.6%. This means that they all occupy more than half of the production cost and they show an increasing trend. Moreover, although the hired labor rate is higher, it has more positive influences on the gross efficiency, technical efficiency and scale efficiency. In addition, the results showed that environmentally-friendly agriculture decreases the efficiency.

• Applied Biological Chemistry
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• v.6
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• pp.45-50
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• 1965

To confirm the increase effect of $MNH_4$ which has been compounded as a result of two years' potted rice experiments, we have established simple experiment areas in the paddy field of Kyung-Puk, Kyung-Nam and Chon-Puk Provinces and have done the completely randomized design experiments with the following results. 1. Comparison of the gross weight of the harvested rice (Straw included) : The $MNH_4$ 1-area has produced 10-28% more harvest than that of control-area. 2. Comparison of the weight of the Unpolished Rice: The $MNH_4$ 1-area has shown 10-23% increase compared with the control-area. 3. In the comparison of the nutrients of the rice from the $MNH_4-area$ with those of the rice from the control area, $MNH_4-area$ showed increase of $N_2$, $P_{2}O_5$ and $SiO_2$ but a slight decrease of $K_2O$.

• Journal of the Institute of Electronics Engineers of Korea SC
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• v.44 no.3
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• pp.9-13
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• 2007

This Paper deals with the synthesis of absolutely stabilizing fixed order controllers for Lure-Postnikov systems. Lure-Postnikov systems are frequently encountered in mechanical engineering applications. Analytical tools for synthesizing stabilizing fixed structure controllers, such as the PID controllers examining the absolute stability of Lure-Postnikov systems, have recently been studied in the literature. However, tools for synthesizing controllers of arbitrary order have not been studied yet. We propose a systematic method for synthesizing absolutely stabilizing controllers of arbitrary order for the Lure-Postnikov systems. Our approach is based on recent results in the literature on approximation of the set of stabilizing controller parameters that render a family of real and complex polynomials Hurwitz. We provide an example of a robotic system to illustrate the procedure developed.