• Korean Journal of Food Science and Technology
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• v.41 no.1
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• pp.1-6
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• 2009

This study investigated arsenic speciation and risk assesment in 30 samples of hijiki purchased from local market in 10 Korean cities. The mean arsenic concentration of the hijiki samples was 45.65 mg/kg (dryness; moisture content of 91.1${\pm}$1.6%), and the major arsenic compound was arsenate [As(V)]. The concentrations of As(V) and As(III), as inorganic arsenic compounds, were detected to be 40.36 mg/kg and 0.37 mg/kg, respectively, and made up 88.6% (40.46 mg/kg) of the arsenic in the hijiki. Among the samples, the highest inorganic arsenic concentration was identified at 9.19 mg/kg (wet), and for an adult with a body weight of 60 kg was within an acceptable level as 0.7% (6.43 mg/60 kg/week) when compared with the provisional tolerable weekly intake (PTWI) (900 mg/60 kg/week), and would be considered safe with respect to health-hazardous effects.

• Applied Biological Chemistry
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• v.47 no.2
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• pp.238-243
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• 2004

To investigate the changes in content of residual pesticides for safety production of young radishes in the production steps in greenhouse and to evaluate the safety of young radishes in the final consuming step, biological half-life of pesticides (diazinon, endosulfan) in packaging products was studied. Samples were collected regularly from 2 hours to 10 days after the distribution of pesticides in young radishes. The contents of residual pesticides in young radishes during cultivating in greenhouse as the levels of distribution concentrations reduced with time. During 10 days of pesticides distribution, decomposition rate of pesticides were diazinon > endosulfan. A half-life of endosulfan was 0.6 day longer than diazinon because endosulfan derived persistent endosulfan sulfate. To produce the safe young radish, after the distribution of the pesticides the desirable harvest time based on maximum residue limit (MRL) was 6th day diazinon for and 10th day for endosulfan.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.17 no.5
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• pp.1-9
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• 2016

Railroad bridges account for 25% of the entire high-speed rail network. Railway bridges are subject to gradual structural degradation or fatigue accumulation due to consistent and repeating excitation by fast moving trains. Wireless sensing technology has opened up a new avenue for bridge health monitoring owing to its low-cost, high fidelity, and multiple sensing capability. On the other hand, measuring the transient response during train passage is quite challenging that the current wireless sensor system cannot be applied due to the intrinsic time delay of the sensor network. Therefore, this paper presents a framework for monitoring such transient responses with wireless sensing systems using 1) real-time excessive vibration monitoring through ultra-low-power MEMS accelerometers, and 2) post-event time synchronization scheme. The ultra-low power accelerometer continuously monitors the vibration and trigger network when excessive vibrations are detected. The entire network of wireless smart sensors starts sensing through triggering and the post-event time synchronization is conducted to compensate for the time error on the measured responses. The results of this study highlight the potential of detecting the impact load and triggering the entire network, as well as the effectiveness of the post-event time synchronized scheme for compensating for the time error. A numerical and experimental study was carried out to validate the proposed sensing hardware and time synchronization method.

• The Journal of Korean Medicine Ophthalmology and Otolaryngology and Dermatology
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• v.18 no.3
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• pp.26-36
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• 2005

Objectives: Maier symptoms of allergic rhinitis are nasal obstructions, sneezing and watery rhinorrhea. When exposed to certain allergens, the IgE covered mast cells degranulate and release inflammatory mediators and cytokines which result in a local inflammatory reaction. In many recent studies, molecular biological methods have been used to investigate the role of cytokines in pathogenesis and new therapeutic targets of allergic rhinitis. This experimental study was done to reveal the effects of the Bojungikgi-tang on the allergic rhinitis. We have studied effect of mice on OVA-induced production of IL-4, IL-5, $INF-{\gamma}$ by murine splenocytes and effect of OVA-induced Total IgE and OVA-specific IgE Meterial and Metheds: 21 BALB/c rats were divided into three groups: normal group, control group, experimental group. To induce the allergic rhinitis in control group and experimental group, rats were sentitized intraperitioneally with 0.1% ovalbumin solution 3 times at intervals of 2 weeks. Then intranasal sensitization was performed by diffusing 0.1% ovalbumin solution 3 times at intervals of 2 days for a week. After that time, rats in experimental group were oral administration treated by the Bojuogikgi-tang fer 28 days. We observed changes of IL-4, IL-5, $INF-{\gamma}$, Total IgE and OVA-specific IgE. We used independent-test statistically. Results: 1. In IL-4 study, Bojungikgi-tang treated group didn't show significant differences. 2. In IL-5 study, Bojungikgi-tang treated group shows significant differences. 3. In $INF-{\gamma}$ study, Bojungikgi-tang treated group shows significant differences. 4. In Total IgE, Bojungikgi-tang treated group shows significant differences. 5. In OVA-specific IgE, Bojungikgi-tang treated group didn't show significant differences. According to this result, Bojungikgi-tang was concluded to be effective on lowering the total IgE. Through this. Bojungikgi tang seems to reduce the symptoms of allergic rhinitis. More studies are required to know exact mechanism of Bojungikgi tang to show the anti allergenic effect.

• Journal of Chest Surgery
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• v.40 no.9
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• pp.617-623
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• 2007

Background: Invasive pulmonary aspergillosis, a frequent fungal infection in immunocompromised patients, is known to have a poor prognosis despite the use of antifungal therapy in leukemic patients. We studied the outcome of surgical resection of invasive pulmonary aspergillosis where bleeding tendency, localized recurrence of infection, and incidence could be reduced. Material and Method: We retrospectively reviewed 14 patients with a hematological malignancy where invasive pulmonary aspergillosis was diagnosed during the 10 years between 1998 and 2007. From the medical records, we reviewed the type and treatment of the hematological malignancy, including the diagnostic methods of invasive pulmonary aspergillosis, the preoperative hematological conditions and their management, and the surgical methods and records. We also analyzed the development of postoperative complications and patient mortality, the recurrence of postoperative invasive pulmonary aspergillosis, and if the patients had a bone marrow transplant. Result: Fourteen patients with invasive pulmonary aspergillosis and a hematological malignancy underwent a pulmonary lobectomy. One patient had a complication of bronchopleural fistula, but there were no other serious complications such as bleeding or wound infection, and none of the patients died postoperatively. Conclusion: We have shown that pulmonary lobectomy is a safe and effective therapy for invasive pulmonary aspergillosis in patients with hematological malignancies that allow further treatment of the hematological malignancy.

• The Korean Journal of Petroleum Geology
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• v.3 no.1 s.4
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• pp.16-27
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• 1995

The Early Miocene Temblor Formation forms an important sandstone reservoir at Kettleman North Dome oil field, California. Sandstones are mostly arkosic in composition except deepest sandstones containing much volcanic rock fragments. Arranged in paragenetic sequence prior to feldspar alteration, the Temblor sandstones contain cements of early calcite, dolomite, quartz, albite, mixed-layer ohloriteismectite (C/S) and smectite, and anhydrite. Diagenetic changes associated with feldspar are albitization of plagioclase, late calcite and laumontite cementation and grain replacement, plagioclase dissolution, and kaolinite cementation. Plagioclase albitization and late calcite and laumontite cementation in Temblor sandstones occurred at the time of maximum burial with temperatures up to $130^{\circ}C$. Volcanic plagioclases were selectively albitized. Most diagenetic changes are interpreted to have occurred before the maior uplift which occurred within the last one million years ago. Since then to the time of hydrocarbon emplacement plagioclase dissolution and kaolinite cementation occurred. This reaction occurred in relatively closed system due to the occurrence of kaolinite next to the site of plagioclase dissolution. Unaltered part of volcanic plagioclase and plutonic plagioclase which escaped albitization during maximum burial were preferentially dissolved to make plagioclase porosity. Secondary porosity resulting from dissolution of plagioclase and carbonate and anhydrite cements was mainly produced by formation waters containing organic acids released during atagenesis of organic matter.

• Korean Journal of Acupuncture
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• v.26 no.4
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• pp.119-133
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• 2009

Objectives : The object of this study is to report on the theory of Ohaeng-Hwa Acupuncture Therapy. Methods : The theory of Ohaeng-Hwa Acupuncture Therapy(OHAT; 五行和針法) is a part of the Five Elements Theory unique to Korea. This research Classic of Difficulty Issues-Nan Jing review Ohaeng-Hwa Acupuncture Therapy. Results : OHAT, created and developed by Jae-hoon Song, integrates the victor-vanquished as well as the son-mother relationship of the Five Elements of breakdown and restoration of balance between yin and yang. And also, it provides resources and data on The seventy fifth Nan(75難), The sixty ninth Nan(69難) of Classic of Difficulty Issues - Nan Jin 75, 69. OHAT establishes objectiveness and accuracy of diagnosis based upon the traditional method and procedure of pulse taking. In OHAT, a person's state of illness is diagnosed by applying the comparative examination of the palpitation of the pulse. It is the fact that the pulse varies according to the state, and that OHAT treatment has proven the positive results by using the victor-vanquished relationship on The Nan Jin 75. On the basis of this, it is necessary to add the sixty ninth Nan(69難), to research the theory of the generation of the Five Element. Conclusions : Ohaeng-Hwa Acupuncture is very effective in treating the wide range of illness, and thus it has gained an increasing attention of many scholars and practitioners in the field of traditional Korean oriental medicine. However, it is the first theoretical attempt to the clinical research and scientific methodology of Ohaeng(Five) Ohaeng-Hwa Acupuncture, and more active Ohaeng-Hwa Acupuncture R&D is being conducted nationwide.

• Journal of the Korean Society of Food Science and Nutrition
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• v.35 no.7
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• pp.874-880
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• 2006

The volatile compounds of Zingiber officinale Roscoe were extracted by simultaneous steam distillation and extraction (SDE) method and identified with gas chromatigraphy/mass spectrometer (GC/MS) analysis. Enantiomeric compositions of chiral compounds were determined by multidimensional gas chromatography/mass spectrometer (MDGC/MS). A total of 57 compounds were indentified and quantified, including zingiberene, ${\beta}-sesquiphellandrene$, ${\beta}-bisabolene$, $(E,E)-{\alpha}-farnesene$ and ${\alpha}-curcumene$. Among them, zingiberene (38.41%) was founds as the predominantly abundant component. ${\alpha}-Pinene$ and nerolidol in dried ginger were detected by high enantiomeric purity (>96%) for (S)-form, and ${\beta}-pinene$ was detected only (R)-form. The enantiomeric composition of ${\alpha}-terpineol$ revealed 72.0% for (R)-form, and linalool and 4-terpineol showed mixtures of both enantiomers. (S)-Enantiomer was the major enantiomer of limonene having enatiomeric excess of 17.2%. Hence the enantiomeric composition of these compounds can be used as parameter for authenticty control of Zingiber officinale.

• (The)Study of the Eastern Classic
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• no.54
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• pp.253-288
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• 2014

A pen name Chuman(秋巒; a mountain of Fall), Jeong Ji-wun(1509-1561) is a famous person wrote "Cheonmyeong-Doseol" which made two men, Yi Hwang and Ki Dae-$s{\breve{u}}ng$ dispute Sachil-Nobyeon(traditional argument about heart/mind). But except this point, few people of nowadays know who Jeong Ji-wun was. Therefore this paper is made for understanding Jeong Ji-wun in the point of view in history of thought. "Cheonmyeong-Doseol" by Jeong Ji-wun had systemized traditional theory of Cheonil-Habil(sky and human are an organic body), through this theory, Jeong Ji-wun had taken an important role who developed the Neo-Confucian theory in the field of political thought at that time. All Neo-Confucian literati used the theory of heart/mind as a sole useful method in political field from after King Myeonjong and Seonjo. "Cheonmyeong-Doseol" by Jeong Ji-wun was a first step to this scene. Especially "Cheonmyeong-Doseol" was got famous by arguments of Yi Hwang and Ki $Dae-s{\breve{u}}ng$, great scholars in the history of Chosun Dynasty. They firstly developed Sachil-Nobyeon, Sandan(pure morality) comes from li, Chiljeong(emotions) comes from Ch'i, is it right or not? This argument with "Cheonmyeong-Doseol" raised up the level of Neo-Confucian theory at that time. Like this, "Cheonmyeong-Doseol" was on the first step for Neo-Confucian literati to study and develop their theory of political thought which covered politics in Chosun Dynasty.

• FLOWER RESEARCH JOURNAL
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• v.19 no.3
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• pp.139-143
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• 2011

This research was conducted to figure out the effect of 1-methylcyclopropene, one of inhibitors of ethylene on the vase life of cut alstroemeria 'Alpine', snapdragon 'Fuji no Yuki', dahlia 'Toast, and lily 'Georgia'. Four kinds of cut flowers were treated with 250, 500, and 750 ppb of 1-MCP respectively for 12 hours. In case of cut alstroemeria, no significant difference was found between the untreated control and the treated ones in the days to flowering. The vase life in the treated ones, however, was extended for over two days, and the treated one with 250 ppb had the longest record with 17.1 days. In every treated ones of cut snapdragon, the remaining florets was more than that of the untreated control. The vase life showed, however, no difference. With the 1-MCP treatment, the vase life of cut dahlia was longer about two days than that of the untreated control. However, water uptake showed the opposite result. The vase life of cut lily showed no significant differences in all treatments. In case of water absorption, the treated one with 750 ppb uptaken more water by 3 ml.