• 한국식품조리과학회지
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• 제31권1호
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• pp.62-71
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• 2015

The purpose of this study was to evaluate the changes on the characteristics of the oxidative stability of Tenebrio molitor larvae during cold storage at $4^{\circ}C$. Pretreatment for T. molitor larvae was designed into three methods: raw (R), freeze-dried (F.D.), and pan-fried (P.F.). The water content of the raw sample (61.46%) was higher than those of other samples (F.D.: 5.02%, P.F.: 3.67%) and its high water content was expected to facilitate the oxidation of the raw sample. In our results, the peroxide value and the carbonyl value of all of the samples increased and the raw sample, after storage for 18 day, showed the highest value. The pan-fried sample had no significant increase in its lactic acid content, acid value, and thiobarbituric acid value; whereas those values were increased in the raw sample and the freeze-dried sample (p<0.05). The browning reaction was more progressed in the pan-fried sample than other samples at 0 day, but there was no significant change during the storage. The raw sample and the freeze-dried sample had their browning indexes increase with the increasing storage period (p<0.05). The pan-fried sample produced less oxidation products than the freeze-dried sample, indicating that the unheated sample was more susceptible to oxidation than the heated samples. In conclusion, heating treatment and low water content would be effective for improving the safety and stability of T. molitor larvae during cold storage.

• 동의생리병리학회지
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• 제25권4호
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• pp.589-595
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• 2011

In order to analyze principles of taking concoction and make clear the origin of contraindication against five pungent vegetables, the regulations of Guizhitang prescription in "Shanghanlun" the twelfth article and "Wushierbingfang", "Wuweihandaiyijian", "Jinguiyaolue" were researched. Four principles of taking concoction were put in order; strengthening the effect of concoction by eating hot rice gruel and wearing bedclothes, preventing decline of drug effect by food regulations, optimization of elution and effect of material herbs by crushing, low heating, determination of administration time based on manifestations of drug effect by sweating and its aspect. These principles and methods of taking concoctions were developed from boiling to simple processing of material herbs, contraindication in the middle of taking concoction and perspiration by wearing bedclothes and eating hot rice gruel in order from the analysis of medical literatures. The contraindication against pungent vegetables were generalized in early Dong-Han dynasty already, and the five pungent vegetables were inferred as Allium tuberosum, Allium bakeri regel, spring onion, wild rocambole and garlic in medical context to the exclusion of religious idea. The reason of prohibition against five pungent vegetables could be interpreted as optimization of therapeutic effects by pharmacological control of pungent ingredients because the healthy qi damage and evil qi retention were resulted from destroying of harmonious ying and wei by overeating pungent vegetables during disease state. Conclusively the regulations of Guizhitang prescription referred to taking concoction in "Shanghanlun" fulfilled their functions to maximize pharmacological effects through various ways inside and outside and these reasonal principles of taking concoction has been influenced over the traditional medical practice deeply.

• Journal of the Korean Wood Science and Technology
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• 제43권4호
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• pp.438-445
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• 2015

유럽에서 개발된 여러 가지 열개질처리 방법 중 독일의 오일열처리 방법을 적용하여 국산 잣나무 시편을 $180^{\circ}C$와 $200^{\circ}C$에서 열처리하였다. 또 같은 종류의 잣나무 시편을 $200^{\circ}C$에서 Thermowood열처리하였다. 열처리 시편의 표면을 자동대패로 대패한 후 1 mm와 4 mm 깊이의 재색을 색차계로 측정하였다. 열처리 시편 내층의 평균 백색도(L*)는 Oil-180 시편이 가장 높고, Oil-200 시편, Tmo-200 시편 순이다. 열처리에 의해 평균 적색도는 모든 시편이 증가하였으나 평균 황색도는 열처리 조건에 따라 증가하거나, 감소하였다. 무처리와 비교한 평균 색차값(${\Delta}E*$)은 Oil-200 시편과 Tmo-200 시편이 30.0 이상이나, Oil-180 시편은 18.4로 상대적으로 적게 변하였다. 열처리 시편 내층간의 평균 색차값 (${\Delta}E*$)은 6.0 이하로 세 열처리 조건 모두 시편 내층의 재색을 균일하게 변화시켰다고 할 수 있다.

• 한국산업보건학회지
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• 제27권4호
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• pp.423-432
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• 2017

Objectives: This study was conducted to evaluate asbestos handling history of workers at automobile manufacturing plants in Korea. Methods: National regulations on asbestos and Korea Occupational Safety and Health Agency(KOSHA) database on the information of asbestos containing products were reviewed. We investigated asbestos related materials from one automobile manufacturing plant. Material safety data sheets(MSDS) collected in 2010, work environment monitoring results reported from 2000 to 2013, trade union reports and asbestos survey reports were reviewed. We also interviewed workers with long career and did walk-through survey. Results: The Ministry of Labor in Korea has permitted asbestos manufacturing since 1990. In 1997, the use of crocidolite and amosite asbestos were banned. In 2007, the Korean government announced a total ban on the manufacturing, importation and use of all kinds of asbestos, which took full effect in 2009. A total of 174 asbestos products information from KOSHA database was analyzed. Extruded cement panel for building, special brake for crane farm machinery, gasket, joint sheet and thermal insulator were produced until 2007. From automobile manufacturing plant survey, we confirmed that asbestos containing materials(ACM) such as gasket, heating induction materials have been used until 2011. Asbestos containing building materials(ACBM) such as bamlites, slate and ceiling tex were reported at 122 asbestos dismantling projects in 2014. Conclusion: Although the use of all kinds of asbestos were banned from 2009, ACMs and ACBMs installed before 2009 were still found at automobile manufacturing plant until 2011 and 2014 respectively. In particular, asbestos slates should be managed because most of slates had not been removed until 2014.

• 공업화학
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• 제20권2호
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• pp.223-226
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• 2009

본 연구에서는 기존 소각방법의 단점을 보완할 수 있는 열분해를 통해 폐전선을 처리하고 부가적으로 생성되는 구리 및 합성연료유의 회수를 그 목적으로 하고 있다. 폐전선의 열분해 공정을 거쳐 구리를 회수하고 쉽게 오일로 분해될 뿐 아니라 오일의 유용성이 매우 크기 때문에 아주 고가의 유효자원을 회수할 수 있다. 폐전선 열분해를 위한 최적 온도를 결정하기 위하여 350, 450, $550^{\circ}C$에서 열분해를 실행하였다. $700^{\circ}C$까지 TG/DTA를 실행하였으며 온도상승률은 분당 $5^{\circ}C$로 하였다. 그 결과 PVC의 염화수소제거를 위한 최적 온도 범위가 PE나 PP보다 낮은 영역인 $280{\sim}350^{\circ}C$임을 보였다. 실질적으로 폐전선으로부터 95% 이상의 구리금속과 발열량이 8027 kcal/kg인 합성연료유를 회수할 수 있었다.

• 한국진공학회:학술대회논문집
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• 한국진공학회 2011년도 제41회 하계 정기 학술대회 초록집
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• pp.353-353
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• 2011

Titanium dioxide is a suitable material for industrial use at present and in the future because titanium dioxide has efficient photoactivity, good stability and low cost [1]. Among the three phases (anatase, rutile, brookite) of titanium dioxide, the anatase form is particularly photocatalytically active under ultraviolet (UV) light. In fabrication of photocatalytic devices based on catalytic nanodiodes [2], it is challenging to obtain a photocatalytically active TiO2 thin film that can be prepared at low temperature (< 200$^{\circ}C$). Here, we present the synthesis of a titanium dioxide film using TiO2 nanoparticles and sol-gel methods. Titanium tetra-isopropoxide was used as the precursor and alcohol as the solvent. Titanium dioxide thin films were made using spin coating. The change of atomic structure was monitored after heating the thin film at 200$^{\circ}C$ and at 350$^{\circ}C$. The prepared samples have been characterized by X-ray diffraction (XRD), scanning electron microcopy, X-ray photoelectron spectroscopy, transmission electron microscopy, ultraviolet-visible spectroscopy (UV-vis), and ellipsometry. XRD spectra show an anatase phase at low temperature, 200$^{\circ}C$. UV-vis confirms the anatase phase band gap energy (3.2 eV) when using the photocatalyst. TEM images reveal crystallization of the titanium dioxide at 200$^{\circ}C$. We will discuss the switching behavior of the Pt /sol-gel TiO2 /Pt layers that can be a new type of resistive random-access memory.

• 공업화학
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• 제19권2호
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• pp.191-198
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• 2008

혼합폐플라스틱의 열분해로부터 얻어진 고분자성분의 열적분해 특성에 대한 연구를 TGA와 GC-MS를 이용하여 수행하였다. 열적분해의 속도론적 연구는 $10{\sim}50^{\circ}C/min$ 사이의 여러 가열속도에서 비등온 질량감소 기술을 이용하여 수행하였으며 활성화 에너지 및 반응차수 등과 같은 속도 상수들에 대한 정보를 얻기 위하여 문헌에 제시된 여러 가지의 속도론 해석 방법을 이용하여 질량감소 곡선 및 그 미분 값을 해석하였다. 또한 회분식 열분해 반응기를 이용하여 반응온도 및 반응시간에 따른 액상 생성물의 수율변화를 고찰하였으며 GC-MS를 이용하여 반응온도의 증가에 따른 액상 생성물의 특성연구를 수행하였다.

• Korean Journal of Acupuncture
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• 제28권4호
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• pp.29-40
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• 2011

Objectives : This study estimated antioxidant effects of the moxi with ginger tar (MGT) ; chemical combustion products produced by moxibustion with ginger during combustion. Methods : To do this aim, we investigated total polyphenol and flavonoid contents, SOD (superoxide dismutase) scavenging activity, ABTS (2.2-azino-bis-3-erthylbenzo-thiazoline-6- sulfonic acid) & DPPH(2,2-Dipheny1-1 -picryl-hydrazyl) radical's scavenging ability of MGT. Results : Total polyphenol contents of MGT was $7.8{\pm}0.09$ mg/g in 10 mg/ml, SOD activity was $42.51{\pm}3.39%$ in 200 ug/ml, DPPH radical scavenging effect of MGT was $83.24{\pm}0.01%$ in 200 ug/ml and ABTS radical scavenging effect was $41.88{\pm}0.16%$ in 200 ug/ml. Conclusions : In this study, the effects of moxi with ginger could be induced by not only heating stimulus on acupoints but also chemical stimulus produced during combustion of moxibustion, MGF. The advanced study about biological mechanism through meridian system, skin aging, and inflammation on MGT will be required.

• 한국가정과교육학회지
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• 제16권4호
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• pp.127-140
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• 2004

이 연구는 중학교 가정 교과 특별실인 가정실의 실내 환경. 교구와 설비, 활용 실태의 문제점을 파악하는데 목적이 있다 연구 자료는 경기도와 인천광역시에 소재한 중학교의 가술 $\cdot$ 가정을 담당하고 있는 150명의 교사를 대상으로 우편을 통한 설문지로 수집되었다. 조사 결과 대부분의 중학교는 가정실을 갖추고 있었다. 가정실은 가정 수업 외 다른 용도로 사용되어 때때로 가정실에서의 수업에 어려움을 주고 있었다. 가정실의 활용 실태는 저조하며 대부분 조리와 재봉수업으로 제한되었는데 그 이유는 실내 환경에서 냉$\cdot$난방과 환기의 부적합. 작업대와 의자 같은 설비뿐만 아니라 교구 등의 부족으로 나타났다. 교사들은 가정실에서 모든 단원의 가정수업이 다양한 형태로 이루어지기를 바라고 있었다. 가정실의 실내 환경과 교구의 개선은 가정실에서의 다양한 수업을 수월하게 할 것이다.

• Korean Journal of Acupuncture
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• 제22권2호
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• pp.127-149
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• 2005

This study is designed to investigate the method of manufacturing herbal acupuncture through literature of oriental medicine. The findings of this study are as follows; 1. The methods of manufacturing herbal acupuncture go through the process of abstraction, purification, mixing, filtration, putting and tight sealing in the container, sterilization, quality control, printing and packing 2. There are many ways to manufacturing herbal acupuncture, for example water-alcohol precipitation, alcohol-water precipitation, liquid-liquid abstract, acid-base abstract, metal base precipitation, distillation, molecular structure, polyamide absorption, dialysis, and ion exchange, etc. And popular method is water-alcohol precipitation. This is through alcohol precipitate extracting the principal ingredients from water abstraction. This is very simple and efficient way using melting characteristics of compounds in herb to water and ethanol. 3. Sterilization of herbal acupuncture is through heating-pressure, boiling, steam flowing, low temperature, filtering, radiation, cooling, and microwaves. Nowadays filtering is commonly used. And sterilization is estimated by an examination of asepsis . 4. Herbal acupuncture must be undergo study and experiment to clinical use. The problems of herbal acupuncture are turbidity, instability, causing hemolysis, pain, and fever. So many provisions (addition, sterilization, and filtration etc.) must be prepared. 5. The theory of manufacturing herbal acupuncture is from oriental medicine, not western. So it must be corresponded to oriental medical theory, for example Gimi(氣味), Guigyung(歸經), Ingyung(引經), Bosa(補瀉), and Match of Herb. It is recommended that further study of many other sided investigations in the future.