• Korean Journal of Food Science and Technology
• /
• v.42 no.3
• /
• pp.277-280
• /
• 2010

Bisphenol A (BPA) is an endocrine disruptor frequently used in food containers, including epoxy resin and polycarbonates. BPA concentrations were monitored by high performance liquid chromatography (HPLC) under photosensitization of riboflavin (RF), methylene blue (MB), rose bengal (RB), or titanium dioxide ($TiO_2$) and the involvement of singlet oxygen was determined using sodium azide ($NaN_3$). The stability of BPA decreased significantly in the order of RF, RB, and MB photosensitization (p<0.05), while the concentration of BPA in samples with $TiO_2$ was not significantly different from that of control samples without photosensitizers under light (p>0.05). The stability of BPA decreased in an MB concentration-dependent manner and increased as the concentration of added $NaN_3$ increased, implying that singlet oxygen was involved in the photodegradation of BPA during MB photosensitization. The results of this study may help control the BPA content in foods or the environments using photosensitized oxidation and visible light irradiation.

• Journal of Pharmacopuncture
• /
• v.11 no.2
• /
• pp.5-12
• /
• 2008

Objective In this article, we report on the intradermal Alcian blue staining method for tracing the meridians of acupuncture. Methods 1% Alcian blue solution was injected into acupoints by using a 0.5mL insulin syringe with a 31-gauge needle, then the skin was incised and was observed under a stereoscopic microscope. The specimens were examined by using immunohistochemical methods and were observed under a confocal laser scanning microscope. Results A threadlike structure, which was visualized with Alcian blue, existed in dermis layer and proceeded to hypodermis. In this structure, characteristic alignments of rod- shaped nuclei and $1-2{\mu}m$ sized DNA granules were observed. Furthermore, abundant blood capillary plexuses, peripheral nerve endings, and a corpuscle-like structure(about $300{\mu}m$ in diameter) were visualized in the skin tissues of acupoints. Conclusion It was concluded that the specific threadlike and corpuscle-like structures corresponded to superficial Bonghan duct and corpuscle, respectively.

• The Journal of the Korea Contents Association
• /
• v.11 no.1
• /
• pp.123-133
• /
• 2011

Rapid development of life sciences about human cloning in real world is reflected alternately ahead and behind in the movies and it brings up the conversation topics about the scenario of diverse human life in the near future. This study is the consideration of the characteristic of the human cloning motif in movies, focused on the feature film which consider human cloning a philosophical point of view. The emergence and evolution of somatic cell cloning conclude the problem of philosophical anthropology. And identity and un-naturality of human clone boils down to desire and dilemma of character in . The dramatize to the exclusion of genre's attribution and the setting of twofold relationship between original and clone as well as real mother and daughter prove the critical mind of as stated above. This study also reported it reinforces the characteristic of the human cloning motif in movies that plotting with parallel narrative and the consistent attitudes with various cinematic expression and techniques.

• Journal of the Korea Society for Simulation
• /
• v.23 no.4
• /
• pp.121-129
• /
• 2014

The importance of evaluation of farming performance has been increasing with the progress of farm size and capitalization, and with the introduction of the concept of the 6th industry to agriculture. In this research, ROIC(Return on Invested Capital) tree technique was examined as a new method for analyzing operations performance of supply chain for farm produce. Current practices of production and distribution of blueberry, model crop, were investigated and ROIC tree for blueberry has been set up from the survey of the supply chain. Then, it was simulated with real values collected from the participants in the supply chain and the previous studies using a spreadsheet program. The resulting ROIC value was compared with those of other industries and the conventional performance analysis method. Features of the evaluation technique were identified and it was proposed how to apply it to agricultural field in the future.

• Korean Journal of Optics and Photonics
• /
• v.14 no.1
• /
• pp.1-7
• /
• 2003

We determined the optical constants of organic light emitting material of Alq$_3$ in a spectral range between 1.5 and 6 eV using the physical model introduced by Forouhi and Bloomer［Phys. Rev. B 34, pp. 7018-7026, 1986.］. The initial parameters of $A_i,\;B_i,\;C_i$ of Forouhi-Bloomer dispersion relations were determined from the absorption peaks and widths of absorption spectra of the Alq$_3$ film. The refractive index of substrate, a fused silica, is derived from the Sellmeier equation with the measured transmittance and reflectance spectra. Then, the complex refractive index and thickness of the Alq$_3$ film were calculated by use of a nonlinear least square fitting program with the Forouhi-Bloomer dispersion relation and the measured transmittance and reflectance spectra.

• Journal of the Korean Society of Food Science and Nutrition
• /
• v.43 no.3
• /
• pp.419-424
• /
• 2014

Metabolite profiling of blueberry (cultivar "Spartan") was performed by extraction using different solvents, methanol and ethyl acetate, through metabolomic analysis using LC-MS/MS. Unsupervised classification method (PCA) and supervised prediction model (OPLS-DA) provided good categorization of metabolites according to the extraction solvents. Metabolites of the anthocyanin family, including delphinidin hexoside, delphinidin, 5-O-feruloylquinic acid, malvidin hexoside, malvidin-3-arabinoside, petunidin-3-arabinoside, and petunidin hexoside, were mainly detected in methanol fractions, whereas those of the flavonoid family, including chlorogenic acid, chlorogenic acid dimer, 6,8-di-C-arabinopyranosyl-luteolin, and luteolin were successfully prepared in the ethyl acetate fraction. Thus, metabolomic analysis of blueberry extracts allows for the simple profiling of whole and distinctive metabolites for future applications.

• Journal of the Institute of Convergence Signal Processing
• /
• v.7 no.1
• /
• pp.33-37
• /
• 2006

In this paper, we present a centralized monitoring system for infant incubator using Bluetooth. Conventional monitoring systems for incubators require large space and wire connection, which causes the spatial restrictions. To overcome this disadvantage, centralized monitoring system is proposed for infant incubators using Bluetooth. The implemented system consists mainly of transmission systems and receiver systems. There are temperature sensors, humidity sensors, ECG measurement units and Bluetooth modules in the transmission systems. For temperature, humidity and ECG data, the transmission systems acquire them from the measuring modules in the incubator and transmits the signals using Bluetooth. In the receiver system, users can see the status of the infant by accessing the central monitoring host computer. That is, one can monitor the information on the temperature and the humidity in the incubator and Infant's ECG without dependence to a conventional bulky system. Also, the system manager in the receiver system can maintain centralized monitoring of the situations in all incubators and infant. The developed system will be useful in remote diagnosis of infant incubator In various environments.

• Korean journal of applied entomology
• /
• v.56 no.4
• /
• pp.357-363
• /
• 2017

Hatchability of eggs and rate of weight reduction in pruned twigs with egg-mass of R. shantungensis were investigated in blueberry and peach orchards from December to March. Hatchability of R. shantungensis eggs were 52.8~68.4% on normal twigs in the field. However, the rate of hatchability dropped to less than 1% after pruning. Moisture content of twigs after pruning blueberry and peach were 9.8~20.9% and 7.5~13.8%, respectively. This result revealed that the hatchability of R. shantungensis eggs might be very low or nil, because the eggs dried up after pruning of the twigs with egg-masses of R. shantungensis.

• Journal of Applied Biological Chemistry
• /
• v.57 no.2
• /
• pp.161-164
• /
• 2014

To establish the pre-freezing treatment and to secure microbial safety of blueberry, Korean raspberry, and mulberry, the effects of chemical sanitizers on the populations of microorganisms in the berries were examined. Among the treatments, the combined treatment of 50 ppm aqueous chlorine dioxide and 0.1% fumaric acid reduced most the populations of total aerobic bacteria in the blueberry, Korean raspberry, and mulberry by 2.56, 2.26, and 2.56 log CFU/g, respectively, compared to the control. The populations of yeast and mold in the blueberry, Korean raspberry, and mulberry by the combined treatment were also reduced by 2.24, 2.08, and 1.49 log CFU/g, respectively. These results suggest that the combined treatment can be useful for reducing the microbial contamination and maintaining the quality of frozen berries.

• Journal of Digital Convergence
• /
• v.17 no.2
• /
• pp.389-397
• /
• 2019

The purpose of this study is to present guidelines for service design for efficient operation of Maker Space due to the proliferation of Maker Movement. First, we investigate the literature survey and prior research on the definition and status of Maker space. Second, we performed video ethnography, participant observation and in-depth interview on maker space service by qualitative survey method. Third, we analyze the surveyed contents and present guidelines such as Persona or Blueprint for maker space. We classify Maker space into general lab and professional lab, derive Persona from each Maker space, and establish Blueprint to provide guidelines for design and operation. It is expected that the Maker space service design presented in this study can be used as a guideline to help the service improvement of the existing Maker space and the planning, design and operation of the new Maker space.