• Food Science and Preservation
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• v.13 no.1
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• pp.13-17
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• 2006

The strawberry was dipped into $1\%\;CaCl_2$ solution at $20^{\circ}C\;and\;45^{\circ}C$ for 15min. respectively, and then packaged with or without PE film (thickness: 0.011mm) before putting into the cold storage at $5^{\circ}C$. The results showed the lowest rate of rot incidence and the highest firmness with higher Vitamin C content and the best superficial appearance in the treatment of $CaCl_2$ dipping at $45^{\circ}C$ with packaging. It also showed lower pH and higher titratable acidity in the treatment However, no significant difference of SSC was found among various treatments. The results suggested that the combination of postharvest calcium dipping and packaging could result in more effective preservation for strawberry compared with the individual treatment.

• Food Science and Preservation
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• v.22 no.3
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• pp.314-321
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• 2015

This study was conducted to investigate the quality and characteristics of semi-dried persimmons soaked in different concentrations of sugar solution and stored at $7^{\circ}C$ for 20 days. The L value and chroma value were significantly higher in S5 and S10 compared to the other concentrations of sugar solution. The ${\Delta}E$ and browning degree were increased according to the increase in concentration of sugar solution. Total sugar, reducing sugar, and sugar free contents were higher in the control (semi-dried persimmon) than those in S0, but they increased according to the increase in concentration of sugar solution. Polyphenol oxidase and peroxidase activities were decreased according to the increase in sugar solution concentration, which were highest in S0 among other semi-dried persimmons soaked in sugar solutions. Total ascorbic acid content was highest in S10 (12.29 mg/g), followed by S0 (2.54 mg/g), S5 (7.76 mg/g), S15 (6.05 mg/g), and S20 (5.05 mg/g). Total polyphenols, flavonoids and proanthocyanidins contents were the highest in S10 compared to other semi-dried persimmons soaked in sugar solutions. Furthermore, the same tendency was observed with DPPH radical scavenging ability. These results showed that 10% sugar solution could be applied to semi-dried persimmons in order to achieve high quality, nutritional value, and browning inhibition.

• Reproductive and Developmental Biology
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• v.37 no.4
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• pp.213-217
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• 2013

The objective of this study was to investigate the effect of bacterial contamination on elapsed time after preservation on boar semen. Known numbers of Escherichia coli (E. coli) were inoculated to freshly ejaculated semen and sperm parameters such as viability, motility, agglutination, acrosome integrity and hypo-osmotic swelling test were performed during 7 days of liquid preservation. Semen samples were prepared using antibiotic free BTS extender and 4 different levels of E. coli were treated to semen with following concentrations; 3,000, 5,000, 7,000, 10,000 CFU/ml of sperms. Semen samples were preserved at $17^{\circ}C$ for 7 days in semen storage until analyzed. Aliquots were subjected to measure the sperm viability, motility and agglutination using computer assisted sperm analysis (CASA) system, acrosome integrity was performed using chlortetracycline (CTC) staining method and hypo-osmotic swelling test was performed using hypotonic solution from day 1 (day of semen collection) to 7. Detrimental effects on sperm motility and viability were observed 3 days after preservation at the level of 5,000 CFU/ml (p<0.05). Percentage of sperm abnormality was higher (p<0.05) in over 5,000 CFU/ml groups. Sperm agglutination rate was also significantly higher (p<0.05) in groups of 5,000 and 7,000 CFU/ml. The rate of acrosome reacted sperm was higher as preservation time goes in all the samples but the pattern was clearly higher among E. coli contaminated groups (p<0.05). The sperm membrane integrity in terms of hypo-osmotic test, E. coli affects little compared to other sperm parameters. The deleterious effects observed due to the bacterial contamination in semen suggest that importance of hygiene protocol to minimize the bacterial contamination during semen collection and processing.

• Tuberculosis and Respiratory Diseases
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• v.46 no.4
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• pp.512-522
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• 1999

Background: Due to the paucity of suitable donor organs for lung allotransplantation, a number of techniques have been developed to improve the lung preservation. Ultrastructural studies of the morphologic changes of the flushing, preservation and reperfusion injury in donor lungs have rarely been reported. Methods: Adult dogs (n=46) were matched as donors and recipients for the single lung transplantation. The donor lungs were preserved after flushing with preservation solution and transplanted after 20-hours of preservation at $10^{\circ}C$. Ultrastructural features of the lung were examined after flushing, preservation and 2 hours after lung transplantation (reperfusion) respectively. Results: Electron microscopy after flushing showed focal alveolar collapse and mild swelling of type I epithelial cells. After preservation both type I epithelial cells and endothelial cells were swollen and destroyed focally. The endothelial cells showed protrusion of tactile-like structures into the lumina, blebs or vacuoles of the cytoplasm After reperfusion the lung tissue showed fibrin material in the alveoli, prominent type I epithelial cell swelling with fragmented cytoplasmic debris and marked endothelial cell swelling with vacuoles or tactile-like projections. The alveolar macrophages showed active phagocytosis. Scanning electron microscopic examination of the pulmonary parenchyma showed focally alveolar collapse and focal consolidation after the preservation and more prominent changes after the reperfusion procedure. The lungs preserved with low potassium dextran glucose solution, with additional prostaglandin $E_1(PGE_1)$ and verapamil(VP) showed relatively well preserved ultrastructures compared with those which were preserved with modified Euro-Collins or University of Wisconsin, and with additional $PGE_1$ and/or VP. Conclusion: The ultrastructural changes associated with flushing were mild in severity, the donor lungs were injured during the preservation, and further damage was occurred during the reperfusion. The reperfusion injury resulted in prominent pulmonary parenchymal alterations with a pattern of acute lung injury.

• Tunnel and Underground Space
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• v.9 no.3
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• pp.230-237
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• 1999

Production of limestone for cement in Kangwon and Chungbuk areas reaches over 80 million tonnes per year. However, many regulatory activities for preservation of the environment against potential hazardous impacts from the open pit mining make it difficult for the industry. With recent improvement of the mining methods and working conditions, the regulations related to the quarrying of limestone may need to be revised. Methods for reducing environmental hazards are proposed in this paper, with some suggestions concerning the revision of related regulations. This study is expected to serve as a practical solution for the cement industry in balance of preservation and development.

• Journal of Chest Surgery
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• v.28 no.6
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• pp.549-556
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• 1995

We investigated the effects of aprotinin, a protease inhibitor, on isolated rat heart subjected to cardioplegia and global ischemia for 4 hours and then reperfused for 40 minutes. Before ischemia, hearts were perfused with either aprotinin 1x105KIU/L[Aprotinin group,n=8 or no aprotinin[control group,n=8 added to Krebs-Henseleite solution for 30 minutes. Hemodynamic and biochemical parameters such as heart rate, LVP, dP/dt, coronary flow and creatine kinase were measured before cardioplegia and after reperfusion 10,20,30,40 minutes. After completion of experiment, wet and dry heart weight were measured for tissue water and water content evaluation. On reperfusion, recovery of LVP of aprotinin group at each time point was significantly better than that of control group[p<0.05 , and of dP/dt at reperfusion 40 minutes[p=0.034 . No statistically significant differences in heart rate, coronary flow and CK were observed between the two groups, but aprotinin group seemed to have better recovery. No significant differences in tissue water and water content were observed between the two group.These results suggest that pretreatment of aprotinin is effective in myocardial preservation in prolonged hypothermic ischemia and reperfusion.

• Journal of The Korean Digital Architecture Interior Association
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• v.13 no.4
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• pp.95-108
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• 2013

The purpose of this study is to analyze and to grasp Peter Calthorpe's urbanism through the process that is compared with various developments of urban design field for the preservation of global environment. From this study, Peter Calthorpe's urbanism for global environment is comprehended according to design stages. As a design goal, He seeks a green urbanism that puts emphasis on land use and transportation. As a urban planning, he devises urban footprint for the tool of evaluation and urban planning, and proposes five place types toward mixed-use development, and advocates Transect for eco-friendly land use. As a urban design, he devises urban network model for transportation network based on accessibility, and devises TOD and TOC model for preventing urban sprawl and mitigating carbon emissions, and advocates TND model for pedestrian-friendly space and community life. He makes importance of urban design. Because he thinks that integrative solution is required to global environment and urban design of integrative characteristic is suitable to preserve global environment. The results of this study are summarized as the followings: First, type classification of urbanism for the preservation of global environment and grasping purposes, methods, characteristics according to the types. Second, grasping characteristics and location of Peter Calthorpe's urbanism as a green urbanism. Third, proposing the direction of improvement for our urban planning and design.

• Archives of design research
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• v.14
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• pp.21-31
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• 1996

Many companies in Korea have been suffered from grasping the very essence in designing products what the consumer want to use since rapid development and popularization of westem style have been underwent in all fields during last three decades. The paper introduces the integrate approach, Dogu environment, to find the design solution for this problem. Dogu environment can be envisaged a extension of product environment, which adopts the Gibsonian concepts to include all spaces to achieve the ends in human behavior in addition to the material with diverse concrete shapes and colors. Logic and structure of the approach will be discussed based on design methodology and other related fields, history, social psychology and human behavior science. The application of the integrate approach to adaptive design for the storage and preservation of food has been evaluated and the future system has been deduced using the integrate approach, so called Dogu environment.

• The Journal of Asian Finance, Economics and Business
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• v.8 no.5
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• pp.143-150
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• 2021

This study aims to determine (1) the inhibiting factors and solutions in the development of eco-tourism, and (2) how green entrepreneurship can be used for eco-tourism development. The increasing issue of global warming is pushing awareness of environmental preservation. This condition changes the people's paradigm in traveling from the concept of mass-tourism to the concept of eco-tourism. The development of eco-tourism has consequences for entrepreneurial activities which is known as green entrepreneurship. This study is applied research conducted in East Lombok, one of the regions in Indonesia. The sampling technique used is purposive sampling covering a total of 34 informants. Data collection methods are carried out through interviews, observation, and documentation studies. Based on the data analysis, the findings of this study show that (a) inhibiting factors of eco-tourism development are limitation of eco-tourism knowledge, lack of awareness in environmental preservation, and absence of supporting government policy; and (b) solution for eco-tourism development discovered in this research is divided into five factors i.e., condition, demand, related industry and support, strategy, government. Besides, for applying the green entrepreneurship model i.e., developing the spirit of green entrepreneurship, training in making products and services that are environmentally friendly is needed.

• International Journal of Computer Science & Network Security
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• v.23 no.2
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• pp.101-110
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• 2023

Vehicular Ad Hoc Network (VANET) is considered to be a subclass of Mobile Ad Hoc Networks (MANET). It has some challenges and issues of privacy which require to be solved before practical implementation of the system i.e., location preservation privacy. Many schemes have been proposed. The most prominent is pseudonym change based location preservation scheme. Safety message can be compromised when it sends via a wireless medium, consequently, an adversary can eavesdrop the communication to analyze and track targeted vehicle. The issue can be counter by use of pseudo identity instead of real and their change while communication proves to be a sufficient solution for such problems. In this context, a large amount of literature on pseudonym change strategies has been proposed to solve such problems in VANET. In this paper, we have given details on strategies proposed last two decades on pseudonym change based location preservation along with issues that they focus to resolve and try to give full understanding to readers.