• Korean Journal of Fisheries and Aquatic Sciences
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• v.50 no.6
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• pp.738-744
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• 2017

Effect of dietary inclusion of microalgae, diatom-dominant, oil extracts (MOE) on growth, body composition and shell color of juvenile abalone Haliotis discus was investigated. One thousand four hundred and seventy juvenile abalone were distributed into 21 plastic rectangular containers. Seven experimental diets were prepared: MOE0, MOE0.01, MOE0.05, MOE0.1, MOE0.5, MOE1 and MOE2 diets containing MOE at the concentrations of 0, 0.01, 0.05, 0.1, 0.5, 1 and 2% at the expense of mixture of squid liver and soybean oils, respectively. The experimental diets were fed to abalone in triplicate once a day with a little leftover for 16 weeks. Weight gain and specific growth rate of abalone fed the MOE1 and MOE2 diets were higher than those of abalone fed the all other diets. The shell length and soft body weight of abalone fed the MOE2 diet were longer and heavier than those of abalone fed the all other diets. Crude protein and ash content of the soft body of abalone were affected by dietary inclusion of MOE. The shell color of abalone fed the all experimental diets was different from that of wild abalone. In conclusion, dietary inclusion of MOE improved growth of abalone, but did not shell color of abalone.

• Journal of Ecology and Environment
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• v.30 no.2
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• pp.151-159
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• 2007

We studied the optimal ranges of water and soil characteristics for wetland plants, particularly Scirpus tabernaemontani (softstem bulrush) and Typha latifolia (broadleaf cattail), which are dominant species with potential for restoration of Korean wetlands. We observed vegetation in S. tabernaemontani and T. latifolia communities from the mid to late June, 2005, and measured characteristics of water environments such as water depth (WD), temperature (WT), conductivity (WC), and concentration of several ions $(NO_3{^-}-N,\;Ca^{2+},\;Na^+,\;Mg^{2+},\;and\;K^+)$, and characteristics of soil environments such as soil texture, organic matter (loss on ignition, LOI), conductivity, and pH. The S. tabernaemontani community was accompanied by Zizania latifolia (Manchurian wildrice), Persicaria thunbergii (Korean persicary), Actinostemma lobatum (lobed actinostemma), and Beckmannia syzigachne (American slough grass), while the T. latifolia community was accompanied by P. thunbergii, T. angustifolia (narrowleaf cattail), and Glycine soja (wild soybean). We defined the optimal range for distribution (ORD) as the range that each plant was crowded. The optimal range of water characteristics for the S. tabernaemontani community was a $WD\;10{\sim}50cm,\;WT\;24.0{\sim}32.0^{\circ}C,\;WC\;100{\sim}500{\mu}S/cm,\;{NO_3}{^-}-N\;0{\sim}60ppb,\;K^+\;0.00{\sim}1.50ppm,\;Ca^{2+}\;7.50{\sim}17.50ppm,\; Na^+\;2.50{\sim}12.50ppm,\;and\;Mg^{2+}\;3.00{\sim}7.00ppm$. In addition, the optimal range of soil characteristics for the S. tabernaemontani community was a soil texture of loam, silty loam, and loamy sand, $LOI\;8.0{\sim}16.0%,\;pH\;5.25{\sim}6.25$, and conductivity $10{\sim}70{\mu}S/cm$. The optimal range of water characteristics for the T. latifolia community was a $WD\;10{\sim}30cm,\;WT\;22.5{\sim}27.5^{\circ}C,\;WC\;100{\sim}400{\mu}S/cm,\;{NO_3}{^-}-N\;0{\sim}60ppb,\;K^+\;0.00{\sim}1.50ppm,\;Ca^{2+}\;0.00{\sim}17.50ppm,\;Na^+\;0.00{\sim}12.50ppm,\;and\;Mg^{2+}\;0.00{\sim}5.00ppm$, and the optimal range of soil characteristics for the T. fatifolia community was a soil texture of loam, sandy loam, and silty loam, LOI $3.0{\sim}9.0%,\;pH\;5.25{\sim}7.25$, and conductivity $0{\sim}70{\mu}S/cm$.

• Korean Journal of Weed Science
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• v.31 no.4
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• pp.375-383
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• 2011

This experiment was carried out to confirm characteristics of macro granule (GG) for herbicidal efficacy by using remote-controlled aerial application (RCAA) to control annual and perennial weeds in rice paddy field, and phytotoxicity to rice and non target plants of formulation types. Herbicidal efficacy of GG applied by using RCAA was 93.6~96.6% in flooded direct sowing cultivation. There was no difference in phytotoxicity between the hand and the power applicator methods in terms of height, number of tiller and yield component. Herbicidal efficacy of GG applied by using RCAA was 92.7~97.3% in machine transplanting rice field. There was no difference in phytotoxicity between the hand and RCAA methods in terms of height, number of tiller and yield component. When suspension concentrate (SC) and GG were applied directly on Chinese cabbage, lettuce, cucumber, pepper, soybean and wild sesame, several symptoms of injury such as, the inhibition of growth, yellowish, leaf fall and withering was observed.

• Korean Journal of Food Science and Technology
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• v.52 no.6
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• pp.641-648
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• 2020

The objective of this study was to optimize the mixing ratio of mixed bean protein concentrate (MBPC) and to improve the quality of sausage analogues. Soybean (Glycine max MERR), mung bean (Phaseolus radiatus L.), red bean [Vigna angularis (Wild.)], and pea (Pisum sativum L.) were mixed and processed to produce a MBPC, which was used to make a sausage analogue. The protein, moisture, and carbohydrate content were significantly (p<0.05) different among the samples. A significant (p<0.05) improvement was observed in textural properties (hardness, gumminess, and chewiness), cooking loss, frying loss, and emulsion stability of the sausage analogue. This study suggested the possibility of attaining high-quality sausage analogues and partial sausage analogues using MBPC, which could serve as a potential ingredient in meat analogues.