• Korean Journal of Agricultural Science
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• v.44 no.2
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• pp.244-253
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• 2017

This study was conducted to investigate the growth performance indices among male commercial crossbred Korean native chickens from hatch to twelve weeks of age. A total of 312 one-day-old male birds were used for 6 groups of the commercial crossbred Korean native chicken within 1 paternal line and 6 maternal lines (1A, 2A, 3A, 4A, 5A, and 6A). The chickens were allocated to 24 battery cages to give 4 replicates per each crossbreed with 13 chickens per cage. Ad-libitum feeding was practiced throughout the experimental period and fresh water was available via nipple drinkers at all times. Body weight and feed intake were measured at two-week interval. Among six crossbreeds, the 2A group had the greatest (p < 0.05) body weight at week 8 and the greatest average daily weight gain in week 6 - 8. However, crossbreed 2A had the lowest viability (p < 0.05) at week 8 of all crossbreed groups as well as higher uniformity (p > 0.05) at week 2 than the others. No difference (p < 0.05) was found in any crossbreed Korean native chicken's growth performance indices including body weight, average daily gain, average daily feed intake, feed efficiency, uniformity, and viability after week 8. With this in mind, crossbreed 2A had greater bodyweight, average daily gain, average feed intake, and feed efficiency than the other Korean native chickens 84 days after hatch, although they had lower uniformity and viability than the others.

• Journal of Digital Convergence
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• v.18 no.6
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• pp.197-208
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• 2020

Social enterprises are entities to pursue solving societal problems with maintaining commercial viability. In order for a social enterprise to achieve commercial viability, it must be able to provide products that consumers can satisfy, to make social enterprise trustable, and to establish a lasting relationship with customers. This study suggests that perception of value congruence, price fairness and service quality will affect customer performance such as trust, satisfaction and customer loyalty. And this structural relationship was confirmed through structural equation modelling. The empirical results show that customer trust and satisfaction can be improved when the value congruence is high and service quality is high. Meanwhile, the perception of price fairness has a negative effect on customer trust. However, considering the influence of price fairness on customer satisfaction, the total effect of price fairness on trust is not significant. This result implies that customers are less sensitive to social enterprise product prices than general companies. And customer satisfaction for the social enterprise is positively affecting trust and loyalty, and customer trust is also positively affecting customer loyalty. After the empirical analysis, this study suggests implications for social enterprises to improve customer performance and secure commercial viability.

• Korean Journal of Agricultural Science
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• v.44 no.4
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• pp.531-540
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• 2017

A study was conducted to compare growth performance of six female commercial Korean native chicken (KNC) crossbreeds from hatching to twelve weeks of age. Three hundred and twelve, 1-day-old female commercial KNC were used within 1 paternal line and 6 maternal lines. The chickens were allocated to 24 battery cages to give 4 replicates per strain with 13 chickens per cage. The chickens were reared under continuous lighting (24 h) and water was available at all times. Ad-libitum feeding was practiced throughout the experimental period. Among the six different strains, 2A had the greatest bodyweight (BW) at 42 days after hatching (p < 0.05). No BW difference between six crossbreed strains (p > 0.05) was found thereafter. Crossbreed 1A had the higher average daily gain (ADG) than crossbreed 2A and 3A chickens (p < 0.05), whereas crossbreed 4A, 5A, and 6A had similar ADGs to that of crossbreed 1A (p > 0.05) at 84 days after hatching. Furthermore, crossbreed 4A had a great average daily feed intake (ADFI) from hatching to 84 days (p < 0.05). Nonetheless, there was no difference in the feed conversion ratio (FCR) and uniformity between six crossbreed strains for the experimental period (p > 0.05). Despite that 1A, 4A, and 6A had the higher viability (p < 0.05) than crossbreed 2A and 5A, they had a similar viability than crossbreed 3A (p > 0.05). With this in mind, crossbreed 2A had greater BW, ADG, and FCR than other chicken crossbreeds from hatching to 84 days, although they had a lower viability than others.

• Journal of Life Science
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• v.31 no.10
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• pp.929-936
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• 2021

In the present study, we screened candidate natural compounds which possess the strong anti-proliferative effects on human colorectal HCT116 cells using the commercial natural product library (Selleckchem, L1400) based on cell viability assay. Human colorectal cancer HCT116 cells were incubated with 50 μM of each compound from the natural product library, and then cell viability was measured by MTT assay. From the first screening, five different kinds of natural products (chrysin, diosmetin, emodin, piperlongumine, and tanshinone I) were selected based on cell viability assay in HCT116 cells and commercial availability. All selected natural products significantly decreased cell viabilities in HCT116 cells, whereas pro-apoptotic protein NAG-1 is strongly induced by chrysin or emodin treatment. Chrysin and emodin decreased cell viability in a dose-dependent manner. Moreover, chrysin and emodin increased the expression of pro-apoptotic NAG-1 protein in a dose- and time-dependent manner. In addition, PARP cleavage induced by chrysin or emodin was recovered in part by the transfection of NAG-1 siRNA indicating that NAG-1 may be one of the genes responsible for apoptosis induced by chrysin or emodin. Overall, our findings may provide basic screening data on natural products which possess anti-proliferative activities and may help to understand the molecular mechanisms of anti-proliferative and pro-apoptotic activities mediated by chrysin and emodin.

• Journal of Environmental Science International
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• v.25 no.4
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• pp.557-566
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• 2016

In nine commercial watermelon cultivars, the effects of osmotic seed priming were evaluated for seed viability and seedling growth at different germination temperatures and field conditions. Generally, primed seeds showed improved germination rate and reduced time for emergence at different germination temperatures, as compared to untreated seeds. In particular, priming effect on seed germination was significantly high at $15^{\circ}C$, which is an environment normally resulting in poor germination. Depending on the watermelon cultivar, germination rate under low temperature ($15^{\circ}C$) was improved by up to 15~66% in primed seeds, as compared to untreated seeds. However, priming effect on germination was gradually reduced as the temperature reached to its optimum level for seed germination. Seed priming tended to improve the viability, fresh weight, and dry weight of watermelon seedlings, but its effect on seedling stage was not large, as compared to untreated seeds. Primed watermelon seeds showed improved emergence rate and facilitated germination in the field, but their seedling growth after 30 days from germination was not significantly affected. Our results indicated that seed priming can greatly improve the seed germination at poor temperature conditions in the watermelon.

• Archives of Plastic Surgery
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• v.36 no.2
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• pp.135-139
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• 2009

Purpose: The use of an autogenous fat graft has become a common procedure in plastic surgery. However, questions remain concerning on the viability of fat cells and preservation method of aspirated fat. The purpose of this study was to examine the viability of fat cells stored at $-20^{\circ}C$ in the freeze for 1 year after harvest from abdominal liposuction. Methods: Eighteen adults (aged 24 to 65 years old, 16 female and 2 male) were recruited for this study. Harvested aspirated fat tissues were obtained by suction - assisted lipectomy and frozen at $-20^{\circ}C$ commercial refrigerator for one year (average 12.5 months). The viability off at cells in specimens were measured after thawing. The numbers of viable cells were measured on a fluorescence microscope after staining with fluorescein diacetate and propidium iodide. GPDH (Glycerol - 3 - phosphate dehydrogenase) activity was measured. Cell culture was done for 3 weeks. Results: There were no viable cells under the fluorescence microscope, no detectable GPDH activity, and no cultured cells. Conclusion: These findings suggest that aspirated fat after frozen storage for one year at $-20^{\circ}C$ freezer is inadequate to reuse.

• Animal Bioscience
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• v.37 no.2
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• pp.203-209
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• 2024

Objective: This study aimed to assess the impact of the dilution ratio of Tris diluent, storage at 0℃, and long-distance transportation on the spermatozoa of Simmental cattle. It also validated the feasibility of the regional distribution of fresh semen. Methods: In experiment 1, semen was diluted at four dilution ratios (1:6, 1:9, 1:12, and 1:15) to determine the optimal dilution ratio of Tris diluent. In experiment 2, we assessed sperm viability, progressive motility (objectively assessed by computer-assisted sperm analyzer), and acrosome intactness in Tris dilutions kept at constant 0℃ for 1, 3, 6, 9, and 12 days. We compared them to Tianshan livestock dilutions (Commercial diluent). In experiment 3, semen was diluted using Tris diluent, and sperm quality was measured before and after long-distance transport. Artificial insemination of 177 Simmental heifers compared to 156 using Tianshan Livestock dilution. Results: The outcomes demonstrated that 1:9 was the ideal Tris diluent dilution ratio. The sperm viability, Progressive Motility, and acrosome integrity of both Tris and Tianshan dilutions preserved at 0℃ gradually decreased over time. sperm viability was above 50% for both dilutions on d 9, with a flat rate of decline. The decrease in acrosome integrity rate was faster for Tianshan livestock dilutions than for Tris dilutions when stored at 0℃ for 1 to 6 days. There was no significant difference (p>0.05) in sperm viability between semen preserved in Tris diluent after long-distance transportation and semen preserved in resting condition. The conception rates for Tris dilution and Tianshan livestock dilution were 49.15% and 46.15% respectively, with no significant difference (p>0.05). Conclusion: This shows that Tris diluent is a good long-term protectant. It has been observed that fresh semen can be successfully preserved for long-distance transport when stored under 0℃ conditions. Additionally, it is feasible to distribute semen regionally.

• Nuclear Engineering and Technology
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• v.43 no.4
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• pp.329-334
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• 2011

Two conceptual flowsheets were developed for recycling used nuclear fuel. One flowsheet was developed for recycling used oxide nuclear fuel from light water reactors while the other was developed for recycling used metal fuel from fast spectrum reactors. Both flowsheets were developed from a set of design principles including efficient actinide recovery, nonproliferation, waste minimization and commercial viability. Process chemistry is discussed for each unit operation in the flowsheet.

• Journal of Industrial Technology
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• v.32 no.A
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• pp.29-33
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• 2012

We demonstrated the viability of fully microfabricating SWCNT(single-wall carbon nanotube) film strain sensors for force and weight sensing. Our spray-deposited SWCNT film strain sensors showed good linearity over a range from 0 to 400 microstrain, and much higher sensitivity compared to commercial metal foil-type gauges. The number of grids and the thickness of the SWCNT film were found to have a significant effect on the strain sensing properties of the SWCNT film gauges. A strain sensing methode for the CNT-based strain gauges was also investigated using a binocular type beam load cells. Preliminary results indicate that the microfabrication method shown here is promising for developing a commercial strain gauge using a spray-coated SWCNT thin film. In the near future, various studies will be performed to further enhance the properties of the spray-coated SWCNT film strain sensors.

• KSII Transactions on Internet and Information Systems (TIIS)
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• v.10 no.2
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• pp.807-824
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• 2016

In this paper, a method of mood classification based on user brainwaves is proposed for real-time application in commercial services. Unlike conventional mood analyzing systems, the proposed method focuses on classifying real-time user moods by analyzing the user's brainwaves. Applying brainwave-related research in commercial services requires two elements - robust performance and comfortable fit of. This paper proposes a filter based on Regularized Common Spatial Patterns (RCSP) and presents its use in the implementation of mood classification for a music service via a wireless consumer electroencephalography (EEG) device that has only 14 pins. Despite the use of fewer pins, the proposed system demonstrates approximately 10% point higher accuracy in mood classification, using the same dataset, compared to one of the best EEG-based mood-classification systems using a skullcap with 32 pins (EU FP7 PetaMedia project). This paper confirms the commercial viability of brainwave-based mood-classification technology. To analyze the improvements of the system, the changes of feature variations after applying RCSP filters and performance variations between users are also investigated. Furthermore, as a prototype service, this paper introduces a mood-based music list management system called MyMusicShuffler based on the proposed mood-classification method.