• Korean Journal of Fisheries and Aquatic Sciences
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• v.21 no.4
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• pp.195-205
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• 1988

Distribution of organic materials In the surface sediments was investigated in September 1983 in Chinhae Bay System. Bottom waters containing less than 1ml/l of dissolved oxygen were found in Masan Bay, and in part of Kohyonsong Bay and Wonmunpo Bay. Organic carbon content in the surface sediments of Masan Bay was about 25mg/g and it decreased with increasing distance from the inner Masan Bay. Mean organic carbon contents in Wonmunpo Bay and Kohyonsong Bay were 25.48 and 31.39mg/g, respectively, which are higher values than those in Masan Bay where large amount of domestic and industrial wastewaters art discharged into the surface water and extensive phytoplankton occurs almost year round. Mean organic nitrogen and pheophyton contents were also the highest in Kohyonsong Bay amont eight subareas. In Masan Bay, settling of organic materials on the surface sediments seemed to be not significant because of active tidal mixing and relatively small size of particulate materials. In Kohyonsong Bay and Wonmunpo Bay large fecal pellets produced in shellfish farms could be easily settled down on the sediment because of weak current regime. DO content in the bottom waters were low in the organic material rich areas, and that suggests biodegradation of organic materials in the surface sediments could be an important oxygen consuming process during the study period of September 1983.

• Korean Journal of Adult Nursing
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• v.20 no.1
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• pp.21-32
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• 2008

Purpose: This study was to identify the effects of the hand acupressure therapy on sleep quality and mood state of adults having insomnia. Methods: The study was a one group pretest-posttest design. The subjects for this study were 15 insomniac adults. All the subjects were assessed for their sleep quality and mood state using PSQI(Pittsburgh Sleep Quality Index) and POMS(Profile of Mood States). The pellet stimulating hand acupressure therapy was applied using New Seoam Press Pellets 1 Ho for 4 weeks. Data were analyzed by the SPSS 12.0 version program with descriptive statistics and wilcoxon signed-rank test. Results: The mean total score of PSQI was 6.67 and the POMS was 6.68. There were significant decreases in subject's total PSQI score(p=.000) and in total POMS score(p=.008) after the therapy. Conclusion: These results suggest that pellet stimulating hand acupressure therapy is effective for sleep quality and mood state of adults having insomnia.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.28 no.1
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• pp.144-149
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• 1983

Experiments were conducted to develop a pelletization method of minute tobacco seeds for easy handling at seeding by hand or for mechanical seeding. Serpentine, zeolite, and talc were tested as coating materials and the resulting pills were compared in size uniformity, hardness, length of time needed for coating, percentage of pills containing a single seed, and speed of disintegration when submerged in water. Talc was the poorest and zeolite was good only in hardness. On the other hand serpentine was good in most characters above, except for brittleness. This defect, however, was overcome by double coating, first with serpentine and followed by zeolite. This new pelletizing method results in optimum hardness, uniform size, and high ratio of pellets containing one tobacco seed. When compared to bare tobacco seeds, the double-coated seeds did not differ in germination test.

• Korean Journal of Fisheries and Aquatic Sciences
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• v.45 no.6
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• pp.679-685
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• 2012

A study was carried out to observe the effects of feed types on the growth, feed preference, and enteric feed transition rate of juvenile starry flounder, Platichthys stellatus for 45 days. Fifty fish (avg. 135 g) were stocked each in replication, and fed a commercial extruded pellet diet (EP, 45% protein) and a moist pellet diet (MP, 65% raw mackerel+35% feed powder in wet basis), respectively. The MP presented the higher performance than that of the EP on the feed efficiency ($68.3{\pm}0.9%$ for EP and $92.3{\pm}4.3%$ for MP) and the specific growth rate ($1.07{\pm}0.07$ for the EP and $1.20{\pm}0.05%$ for the MP). In contrast, the EP showed the higher feed preference in terms of the daily feed intake ($1.57{\pm}0.08%$ for the EP and $1.30{\pm}0.01$ for the MP) and the ad libitum feeding rate after a fast of 72 hours (1.73% for the EP and 1.35% for the MP). The feed transition rate through intestinal canals decreased exponentially in both the EP and the MP, showing the faster transition rate with the EP. In the result, starry flounder appeared to have the better feed preference to the EP, but have the higher feed efficiency and growth performance to the MP.

• Asian-Australasian Journal of Animal Sciences
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• v.15 no.6
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• pp.900-904
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• 2002

The duration of spatial memory in cattle is potentially important for grazing management. The ability of livestock to remember the location of food patches may lead to uneven range use. In this experiment, how long cattle are able to remember food locations was determined. Six steers were used to conduct this study in a pasture with an 8 row by 8 column grid of 64 plastic containers 5 meters apart. Four randomly chosen containers were loaded with feed pellets. All steers were trained to find the loaded locations until a minimum of empty containers were visited. After this initial training, each steer was tested at 5, 10, 20 and 48 days post-training. Total number of visits (TV), number of containers visited (NC), the ratio of loaded containers (LC) to NC were recorded. Once the steers learned the locations of loaded containers NC did not increase with time since last training up to 48 days (p>0.05). Logarithmic transformation of NC (LNC) was 0.70 and 0.80 for the control and 48 day treatments, respectively. Steers were equally efficient in locating containers with feed. The steers also showed that their ability in locating food was much better than expected by chance (Z>1.62). Findings of the present study do not suggest using spatial memory decay as a tool to promote better grazing distribution. Because steers remembered food locations accurately for at least 48 days.

• Environmental Engineering Research
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• v.25 no.4
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• pp.605-613
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• 2020

This study is to investigate the possibility of using activated carbon prepared from Iraqi date-pits (ADP) which are produced from palm trees (Phoenix dactylifera L.) as low-cost reactive material in the permeable reactive barrier (PRB) for treating lead (Pb⁺²) from the contaminated groundwater, and then compare the results experimentally with other common reactive materials such as commercial activated carbon (CAC), zeolite pellets (ZP). Factors influencing sorption such as contact time, initial pH of the solution, sorbent dosage, agitation speed, and initial lead concentration has been studied. Two isotherm models were used for the description of sorption data (Langmuir and Freundlich). The maximum lead sorption capacities were measured for ADP, CAC, and ZP and were found to be 24.5, 12.125, and 4.45 mg/g, respectively. The kinetic data were analyzed using various kinetic models particularly pseudo-first-order, pseudo-second-order, and intraparticle diffusion. COMSOL Multiphysics 3.5a depend on finite element procedure was applied to formulate transmit of lead (Pb⁺²) in the two-dimensional numerical (2D) model under an equilibrium condition. The numerical solution shows that the contaminant plume is hindered by PRB.

• Journal of Korean Society for Quality Management
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• v.44 no.4
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• pp.935-949
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• 2016

Purpose: This study attempts to find out the optimum condition of the rotary cutter making pellet in the footwear outsole process. The pellets are used in the process of outsole rubber fabrication to reduce cycle time and save raw material. Methods: Computer simulations are used to analyze the maximum stress in the rotary cutter after designing a variety of cutter shapes. Taguchi method is used to identify the robust condition of the cutter. In $L_{18}$ orthogonal array, the control factors such as knife width, twisted angle, number of knives, diameter, knife depth and supported angle are considered and noise factors like assembly tolerance and amount of antifriction are allocated. Results: It is found that the most important factors to reduce maximum stress in the cutter are supported angle and diameter. Using Tacuchi's results, we can reduce 70% cycle time and 9% raw material compared to the traditional method using cutting die. Conclusion: When designing the rotary cutter, the best conditions are the diameter at its maximum allowable value and supported angle in the boundary of machine inner space.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2006.05a
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• pp.369-370
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• 2006

During demonstrations of a process conditioning spent nuclear fuels, it is necessary to transport and handle Spent fuel road cuts from Post Irradiation Examination facility to Slitting device in The hot cell. the spent fuel pellets which are highly radioactive materials are separated with its clad and are fed into the next conditioning process. For this, a spent fuel rod, 3.5 m long, is cut by 25 cm long which is suitable length for the decladding process. These rod-cuts are packed into the capsule and are moved to the ACPF(Advanced spent nuclear fuel Conditioning Process Facility). In the ACPF, Once the capsule is unloaded in the ACPF, Capsule is taken out one-by-one and installed on the decladding device. In these processes, the crushed spent fuel pellet can be scattered inside the facilities and thus it contaminate the hot cell. In this paper, we developed the specially designed transportation and storage device for spent nuclear fuel capsules.

• Journal of the Korean Society of Tobacco Science
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• v.22 no.1
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• pp.45-50
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• 2000

In order to improve the sowing practice, pelleted seeds of tobacco NC 82(Nicotiana tobacco L.) were manufactured in use of binders at the different levels of viscosity, and their physical properties according to pellet size and biological activity in seed germination were investigated while storage time elapsed. Proper range of the binder viscosity for the pellet formation was 20.3-37.2 m.pas. At the high level of viscosity(45.7 m.pas) took longer time to form the pellet and pelleting was not easy. The high binder viscosity and large pellet size revealed higher level in hardness of the pelleted tobacco seeds, which caused the longer splitting time of pellets in water. High level of binder viscosity(37.2 m.pas) in pelleted seeds led to decrease the biological activity of tobacco seed germination by the storage at 4 t over 30 days. But at the level of 20.3m.pas in binder viscosity, the germination of pelleted seeds was little affected by the long storage time to 120 days.

• Journal of Society of Preventive Korean Medicine
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• v.1 no.1
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• pp.76-84
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• 1997

A study on the antitoxic effects of Herba Taraxaci extracts against Cadmium Chloride Toxicity in Rats. This study was performed to find out the effect of taraxacum platy carpum against Cadmium toxicity. The experimental rats were divided into 5 groups such as control group, Cadmium alone treatment group, three simultaneous treatment groups of taraxacum platy carpum and cadmium. Rat were given pellets administration with three dosage of taraxacum platy carpum such as 4 mg/kg body weight for four weeks. The results were summarized as follows on: 1. The simultaneously administration of taraxacum platy carpum and cadmium significantly more decreased cadmium concentration in liver and kidney tissues compared to the administration of cadmium alone. (p<0.05) 2. The simultaneously administration of taraxacum platy carpum and cadmium significantly more increased metallothionein concentration in liver and kidney tissues compared to administration alone. (p<0.05) 3. When liver and kidney tissues were observed with optical microscope obvious changes were visible in those tissue.