• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2022년도 가을 학술논문 발표대회
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• pp.167-168
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• 2022

Recently, starting with the permanent suspension of Gori 1 in Korea, the importance of the disposal of concrete structures in nuclear power plants has emerged, and environmental and safety are required to be proved accordingly. Safe radioactive waste disposal technology that immobilizes harmful radioactive elements, which are by-products of nuclear power, inside a solid matrix and recycling measures are needed to secure an efficient waste disposal space. This study was conducted to confirm whether recycled cement generated in the process of radioactive concrete treatment can be used as a solidifying material for radioactive waste treatment. In order to simulate the concrete exposed to radiation, aqueous solutions of Di-water, CsCl 1M, and CoCl₂ 1M were used as blending water at W/B 0.5. Tricalcium phosphate and Prussian blue were substituted with 5 wt.% based on the weight of recycled cement as a binder to improve solidification performance, and their hydration characteristic was analyzed.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2023년도 봄 학술논문 발표대회
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• pp.93-94
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• 2023

Through the industrial revolution that began in the 18th century, the amount of carbon dioxide in the atmosphere increased rapidly as humans used fossil energy such as coal and oil as fuel for steam engines and factory machines. The amount of carbon dioxide emitted while producing cement, the main material of concrete used in construction, is large enough to account for 5-8% of the world's carbon dioxide emissions. In this study, Non cement-based matrix were used to reduce carbon dioxide emissions from cement production. Red mud is an industrial by-product generated in the manufacturing process of aluminum hydroxide using bauxite, and more than 120 million tons are produced worldwide. In addition, red mud is a porous material that can be physically adsorbed, and causes a photocatalytic reaction of TiO₂ to remove harmful substances such as nitrogen oxide formaldehyde in the air and chemically adsorbs ammonia and hydrogen sulfide. Therefore, this study aims to examine the physical properties of the matrix by mixing red mud, an industrial by-product with good adsorption performance, into the Non cement-based matrix.

• 한국전기전자재료학회논문지
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• 제37권5호
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• pp.512-518
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• 2024

Titanium oxide (TiO₂), a representative photocatalyst, reacts to ultraviolet ray energy and has antibacterial, deodorizing, and antifouling properties using superhydrophilic properties, so it is widely used in various industrial fields such as environmental purification, building exterior walls, and road facilities. However, due to the nature of the photocatalyst, it reacts to ultraviolet rays known to be harmful to the human body, and is designed to react to natural light outdoors and to ultraviolet light sources inside a sealed device indoors, so indoor space is extremely limited. This study aims to develop spatial antibacterial technology for everyday living spaces by researching methods for antibacterial and deodorization by reacting titanium oxide (TiO₂)-based photocatalysts with the visible light range emitted from lighting devices in everyday spaces. Through the results of this study, it was verified through experiments that the photocatalyst exhibits antibacterial and deodorizing properties in response to lighting devices (LED, fluorescent lights, etc.) used in daily life. Based on the research results, we hope that various studies will be conducted to create a safer living environment by applying this technology to various fields such as large-scale complex facilities where an unspecified number of floating populations gather, airports, port waiting rooms, and public transportation.

• 터널과지하공간
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• 제24권4호
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• pp.316-324
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• 2014

고준위 방사성 폐기물 처분시스템은 지하 500 m 심도에서 암반에 터널을 뚫어 고준위폐기물 처분용기를 넣고 주위를 완충재로 매우는 형태이다. 많은 통계 자료에 의하면 한반도에서 매년 지진이 증가하는 추세이며, 지진이 발생할 경우 지하에서 발생된 전단력에 의해 처분용기가 손상될 수 있다. 더 나아가 방사성 유해물질이 유출되어 큰 환경 문제가 유발될 수 있다. 이에 본 논문에서는 지진에 대해 안전하게 보호할 수 있는 방법으로 내진형 완충재를 개발하였다. 내진 성능에 영향을 미치는 주요인자를 분석하여 내진형 완충재를 설계하였고, ABAQUS를 이용하여 전단해석모델을 개발하여 내진형 완충재의 성능을 평가하였다.

• 보존과학회지
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• 제26권4호
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• pp.437-443
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• 2010

화석 연료의 생성물인 유해 부식 가스와 이들의 원인으로 나타나는 산성 강하물이 야외 동(銅) 조형물을 보호하고 있는 왁스에 미치는 환경에 대한 영향성을 연구하였다. 부식이 유해 가스보다는 체류성이 강한 산성 강하물에 의해 급격히 진행되는 것으로 볼 수 있었으며, 이 부식의 시작이 코팅된 왁스의 백화 현상으로부터 시작되는 것을 알 수 있었다. 산성도가 증가할수록 백화 현상이 크게 발생하였으며 결과적으로 산성강하물 및 부식 가스에 의해 백화 현상의 시작으로 내부 금속의 노출 현상이 나타나게 되어 부식이 진행되는 것으로 알 수 있었다. 왁스가 코팅된 동 시편은 유해 부식 가스와 산성비, 0.1 M의 산들에 노출되었으며 이의 결과로 가장 변화가 적고 산성도에 대한 저항성이 큰 왁스로는 황산의 결과를 제외하고는 모든 실험에서 Renaissance wax의 변화가 가장 작은 것으로 나타났다.

• 한국구조물진단유지관리공학회 논문집
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• 제16권1호
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• pp.1-8
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• 2012

오늘날 첨단산업의 발전과 지구환경 문제의 심각성에 대한 인식이 증가하여 시멘트 산업에서도 다각화 측면에서 다양한 종류의 기술들이 활성화되고 있는 시점이다. 본 연구에서는 최근에 새로이 검토되고 있는 시멘트 대체 재료로서 천연제올라이트를 주원료로 사용한 제올라이트 시멘트 콘크리트에 관한 기초 물성에 대해 분석하는데 목적이 있으며, 악취 및 유독가스 제거기능이 우수하며 중금속, 암모니아와 같은 양이온성 오염물질을 제거하는 이온교환능, 흡착능, 분자체효과를 가지며 또한 다공성 물질이라 보온능력이 좋은 것으로 알려진 천연제올라이트와 알칼리 활성제(NaOH)의 양에 따라 콘크리트의 압축강도, 슬럼프, 블리딩 및 공기량 등을 실험하였다. 천연제올라이트 콘크리트의 압축강도 측정결과 거의 40MPa정도로 측정되었으며 슬럼프, 블리딩, 공기량 시험에서도 일반 콘크리트과 비슷한 성능을 나타내어 향후 고성능, 고기능성 건설재료로 사용 가능하다고 판단되어진다.

• 한국식품저장유통학회지
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• 제14권1호
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• pp.87-93
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• 2007

화분의 발아조건에 따른 식품유해균에 대한 항균성을 비교 조사하였다. 그 결과 10%(w/v)설탕용액에 화분 8%(w/v)를 첨가하여 $30^{\circ}C$에서 4일간 발아시켰을 때 식품유해균에 대한 항균활성이 가장 높게 나타났다. 화분발아액의 최소저해농도를 그람양성세균은 $40\;{\mu}L/mL$, 그람음성세균은 $30\;{\mu}L/mL$에서 균생육이 억제되는 것으로 나타났다. 화분발아액의 유기산을 조사한 결과 acetic acid와 lactic acid의 함량이 높은 것으로 나타났다. 화분발아액의 열과 pH 안정성을 조사한 결과 열에 대해서는 안정하지만 pH 안정성은 낮은 것으로 나타났다. 이상의 결과로 도토리 화분발아액은 항균활성이 있는 것으로 나타나 천연항균제로 활용이 기대되었다.

• 한국자원식물학회:학술대회논문집
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• 한국자원식물학회 2018년도 추계학술대회
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• pp.127-127
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• 2018

Probiotics are microorganisms that have beneficial effects on the health of the host. The health promoting effect by probiotics influences suppressing harmful bacteria, prevention of constipation, blood cholesterol reduction and regulation of blood pressure. Prebiotics are used to promote the growth or activity of microorganisms. Synbiotics, which are a mixture of probiotics and prebiotics, synergize in the intestines by complementing each other. Synbiotics not only improves the viability of the probiotics while passing through the gastrointestinal tract, maintain intestinal homeostasis, but also regulate balance of harmful and useful bacterial growth. Glycine max Merr (GMM) has been widely used in Asian countries to treat cancer, obesity, oxidative stress and imbalanced immune diseases. In addition, it has been reported that dietary fiber-rich grains promote bowel movements and prevent constipation. In this study, we investigated the viability of LactobacillIus buchneri (L.buchneri) strains, known as lactic acid bacteria under conditions of gastric fluid and intestinal fluid to determine the suitability of L.buchneri as probiotics. The adhesion ability of L.buchneri to caco-2 cells was also confirmed. The present studies showed that GMM extract promoted the growth and activity of L.buchneri strains as prebiotics. Also, this results suggested that the mixture of L.buchneri and GMM extract can helps maintain intestinal health and healthy body as synbiotics and health functional food material.

• 한국안전학회지
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• 제21권5호
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• pp.28-33
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• 2006

The rapidly advanced industrial society takes advantage of high-technology, but it also suffered from the side effects such as various diseases by contamination. Of these problems, air pollution is considered as the most important problem nowadays. Air contamination is not only limited outdoors, but it also causes more serious effect in our indoor air environment. Depending on the notion that indoor air effects physical health seriously, the needs of the air cleaner is more earnest. Therefore, the main purpose of this study is to develop the air cleaner to meet the standard and get rid of poisonous and harmful material from the atmosphere by using a Corona Discharge. According to the purpose of this study, We set the negative ion generator, the UV, $TiO_{2}$ optical catalyzer, the electrical dust collector and the air filter in series order. It emits a lot of negative ions. We use these ions to purify harmful factors and contaminated materials. We collect the dust using static power that comes from the discharge of corona. At the same time, we try to develop the air cleaner to keep the air quality to meet the standard and kill the various viruses using UV LED and $TiO_{2}$ optical catalyzer. In this study, we use the UV LED that is smaller and efficient than a existing UV lamp. What is more, the UV LED has a features that a stabilizer occupying much space is not needed any more.

• 한국식생활문화학회지
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• 제9권4호
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• pp.341-353
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• 1994

This study delves into the general characteristics of spirits brewed in the Central Region of Korea-Seoul, Kyonnggi-do, Chungchung-do-paying particular attention to their varieties and fermenting methods and also comparing similarities and differences of their features. It is found first of all that there are a wide range of variety in the kinds of liquors. Among the 21 spirits investigated, not a single one resembles any one of the remaining in terms of the raw material, and the brewing method and process. Secondly, all of them use locally produced grains and can be classifiable as belonging to the common category of yakju (clean spirit) with fragrant elements added for the purpose of enhancing health or decreasing any harmful effects after drink. Thirdly, these traditional folk wines are characterized by the addition of secondarily fermented spirits. The more secondarily fermented spirit a wine has, the more fragrant and palatable it becomes and also the less harmful. Fourthly, all the spirits of this region are fermented by using yeast kodupap (steamed rice). The brewing temperature is usually around $15{\sim}20^{\circ}C$ for $5{\sim}8$ days or $3{\sim}4$ days for the majority of the cases. Fifthly, purifying is done with the yongsoo (strainer), the sieve, traditional Korean paper, etc. As such, we can say that all the brewers endeavor to maintain Korean traditional methods of wine making.