• Journal of the Korean Wood Science and Technology
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• 제42권4호
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• pp.491-498
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• 2014

ACQ 목재 방부처리 현장에서 약액의 농도관리에 필요한 기초 자료를 얻기 위하여 ACQ 약액을 회수하여 재사용하는 과정에서 일어나는 약액의 농도 변화, 처리 목재의 약제 흡수량 그리고 Cu (CuO로써)와 DDAC의 유효성분 비율변화 등을 조사하였다. 목재 수종은 낙엽송, 미송, 라디에타소나무를 사용하여 조사하였다. ACQ 약액을 회수하여 재사용하는 과정에서 재사용 횟수가 증가함에 따라 약액의 농도는 감소하였으며, 농도 감소경향은 유효성분의 종류별로 다르게 나타나 Cu보다는 DDAC의 농도 감소가 크게 나타났다. Cu의 농도감소는 처리 수종에 크게 영향을 받지 않았으나, DDAC의 경우에는 약액 흡수가 많은 수종에서 농도 감소의 폭이 크게 나타났다. 약액의 재사용 횟수에 관계없이 Cu의 목재 흡수량은 일정한 수준을 유지하였으나 DDAC 흡수량은 재사용 횟수의 증가와 함께 지속적으로 감소하였다. 약액의 재사용 횟수의 증가로 DDAC 농도가 감소하면 Cu의 흡수량이 증가하였으며, 이것은 처리 목재 내 흡착반응 과정에서 경쟁 관계에 있는 DDAC의 양이 감소함에 따라 상대적으로 Cu의 흡착량이 많아지기 때문인 것으로 판단하였다.

• 한국패션뷰티학회지
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• 제2권2호
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• pp.93-100
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• 2004

This study is to measure the heavy metal content of permanent wave products which on marketing correctly as estimating the extent of exposure by a hair permanent wave scientifically. We would like to prevent an affair from arising health obstruction as to the heavy metal who is using those and also show the basic data for proposing the new standard. The results were as follows.: in case of the average heavy metal content for a wave type thioglycol acid ingredient includes 1.61ppm(Pb), 0.03ppm(Cd), 0.05ppm(Ni), 0.27ppm(Mn), 0.82ppm(Cu) and those were recognized the significant gap between products all the heavy metals. In case of a cysteine acid ingredient includes 0.86ppm(Pb), 0.01ppm(Cd), 0.05ppm(Ni), 0.20ppm(Mn) and 0.66ppm(Cu) and those were recognized the significant gap between products except a nickel. Straight type of permanent wave reductant includes 2.11ppm(Pb), 0.01ppm(Cd), 0.27ppm(Ni), 0.66ppm(Mn), 2.53ppm(Cu) and those were recognized the significant gap between products all the heavy metals. Permanent wave reducing agent includes 1.43ppm(Pb), 0.01ppm(Cd), 0.09ppm(Ni), 0.66ppm(Mn), 0.75ppm(Cu) and those were approved the significant gap between products except a cadmium. Exposure level of the heavy metal contents per onetime permanent waving were 242.3ppm(Pb), 2.5ppm(Cd), 17.7ppm(Ni), 89.0ppm(Mn), 174.7ppm(Cu).

• 대기
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• 제23권3호
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• pp.245-264
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• 2013

Heavy rain over the Gangwon region has distinct characteristics in the temporal and spatial distribution of rainfall, most of which are concentrated on a very short period of time and either part of Yeongdong and Yeongseo regions. According to its regional distribution, heavy rain events over the Gangwon region may be classified into Yeongdong and Yeongseo heavy rain in which rainfalls of more than 110 mm $(6 hrs)^{-1}$ (heavy rain warning) have been observed in at least one of the weather stations over only Yeongdong or Yeongseo region, but over the other region the rainfalls are less than 70 mm $(6 hrs)^{-1}$ (heavy rain advisory). To differentiate between Yeongdong and Yeongseo heavy rain, 9 cases for Yeongdong heavy rain and 8 cases for Yeongseo heavy rain are examined on their synoptic and mesoscale environments using some meteorological parameters and ingredients. In addition, 8 cases are examined in which heavy rain warning or advisory are issued in both Yeongdong and Yeongseo regions. The cases for each heavy rain type have shown largely similar features in some meteorological parameters and ingredients. Based on an ingredient analysis, there are three common and basic ingredients for the three heavy rain types: instability, moisture, and lift. However, it is found that the distinct and important process producing strong upward vertical motions may discriminate among three heavy rain types very well. Yeongdong heavy rain is characterized by strong orographic lifting, Yeongseo heavy rain by high instability (high CAPE), and heavy rain over both regions by strong synoptic-scale ascent (strong 850 hPa Q-Vector convergence, diagnostics for ascent). These ingredients and diagnostics for the ingredients can be used to forecasting the potential for regional heavy rain. And also by knowing which of ingredients is important for each heavy rain type, forecasters can concentrate on only a few ingredients from numerous diagnostic and prognostic products for forecasting heavy rain events.

• Journal of Dairy Science and Biotechnology
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• 제23권1호
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• pp.9-17
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• 2005

Nanotechnology has penetrated into the various branches of research and development and it is particularly of benefit to the particle size engineering. It has been widely known that the particle size of an active pharmaceutical ingredient (API) is critical in determining the bioavailability and processability of pharmaceutical formulation. However, the window of appropriate particle size has been limited mainly due to related processing difficulties. The windows have been widened by the recent development of nanotechnologies, resulting in diversified drug delivery systems. The impact of this development is far more fundamental than what can be expected from conventional particle size engineering. It is the case that the preparation and use of nanoparticles will soon be a common task in the particle engineering step of pharmaceutical unit operations. In this chapter, the basic principles of variouspreparation techniques will be discussed in detail. Regardless of processing details, the preparation methods of pharmaceutical nanoparticles mainly concern how to deal with the extra energy related with particle size. Depending on the ways of treating the e103 energy, preparation methods can be classified into two major classes, i.e.. thermodynamic and kinetic approaches. The recent progresses have shown the possibilities of much more complex combinations of different approaches and the use of new types of energy and nanostructures.

• 융합정보논문지
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• 제11권11호
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• pp.288-295
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• 2021

본 연구는 마스크팩 유효성분을 흡착시킨 엔드 페이퍼를 퍼머넌트 웨이브 시술시 모발에 미치는 영향을 알아보고자 수행하였다. 시중에 판매되는 마스크팩 중 청귤, 콜라겐, 어성초 유효성분을 함유한 마스크팩을 구입하여 엔드 페이퍼에 흡착시켜 퍼머넌트 웨이브를 시술하였다. 실험 방법으로 모발 굵기, 모발 보습력, 인장강도, SEM을 이용한 모표피 관찰, EDS를 이용한 모발 구성 원소 분석을 하였다. 실험 결과 어성초 유효성분을 엔드 페이퍼에 처리한 실험군이 모발 굵기, 인장강도, 모표피 관찰, 모발 구성 원소 분석 결과 모발 보호효과가 있는 것으로 확인되었다. 또한 청귤 유효성분을 엔드 페이퍼에 처리한 실험군은 모발 보습력 실험 결과에서 비교적 많은 수분을 함유하고 있는 것으로 확인되었다. 유효성분들이 함유된 기초화장품 제품들을 활용하여 모발화장품으로 개발하여 활용하고, 산업현장에서 화학시술 시에 적용할 수 있도록 다양한 재료와 도구들에 대한 개발과 연구가 진행되기를 바라는 바이다.

• 한국수산과학회지
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• 제54권6호
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• pp.835-840
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• 2021

This study was conducted to understand the quality characteristics of 89 types of commercial salt-fermented fishery products by measuring their physiochemical compositions and biogenic amine contents. All samples had the following measurements; 41.59-89.20 g/100 g of moisture, 1.71-25.70 g/100 g of salinity, 3.21-7.05 of pH, 0.80-2.93 g/100 g of total nitrogen, 87.02-1,296.78 mg/100 g of amino nitrogen, and 7.30-926.34 mg/100 g of volatile basic nitrogen. The physicochemical components differed extensively between samples from different raw materials, including, fish, shellfish, and others. Histamine (0 to 1,072.2 mg/kg), putrescine (0 to 2,536.4 mg/kg), cadaverine (0 to 545.2 mg/kg of cadaverine), tryptamine (0 to 1,287.9 mg/kg), and tyramine (11.3 to 563.3 mg/kg) were the major biogenic amines detected in the samples. These findings suggest that salt-fermented fishery products meet the domestic criteria but have different ingredient compositions and most had high biogenic amine contents. The results suggest that it is necessary to establish criteria for evaluating the quality characteristics using the ingredient composition and biogenic amine contents of commercial salt-fermented fishery products.

• 한국응용과학기술학회지
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• 제40권1호
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• pp.103-112
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• 2023

본 연구는 우울에 효과가 입증된 국내 자생 식물 9종(배초향, 적송, 강황, 생강, 산미나리씨, 불수감, 황칠, 탱자, 쥐오줌풀) 을 선정하여 각각의 향기 성분 분석결과를 기반으로 9종 정유를 조합하여 항산화(DPPH, ABTS), 세포독성(MTS), 항염(Nitric oxide)실험을 수행하였다. 향기성분 분석결과 조합오일에서 기연구된 우울완화 효과 성분인 DL-Limonene(38.44%), g-Terpinene(8.9%), Estragole(5.18%), a-Pinene(1.73%) 등이 동정되었다. 항산화 활성인 DPPH 라디칼 소거능은 75.4%, ABTS 라디칼 소거능은 74.04%을 보였으며, 세포독성이 확인되지 않은 5uL/ml의 농도에서 NO 생성 저해능은 33.14%로 나타났다. 이를 통하여 국내 블렌딩 정유의 우울증의 개선 또는 예방에 대한 효과를 검증하고 더불어 과학적 효능과 성분 연구가 상호 협력적으로 이루어져 우울증적 증상 개선 유무를 확인 할 수 있는 기초자료로 제공하고자 한다.

• Asian Pacific Journal of Cancer Prevention
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• 제15권10호
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• pp.4301-4305
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• 2014

Tanshinone IIA is a pharmacologically active ingredient extracted from Danshen, a Chinese traditional medicine. Its molecular mechanisms are still unclear. The present study utilized computational approaches to uncover the potential targets of this compound. In this research, PharmMapper server was used as the inverse docking tool andnd the results were verified by Autodock vina in PyRx 0.8, and by DRAR-CPI, a server for drug repositioning via the chemical-protein interactome. Results showed that the retinoic acid receptor alpha ($RAR{\alpha}$), a target protein in acute promyelocytic leukemia (APL), was in the top rank, with a pharmacophore model matching well the molecular features of Tanshinone IIA. Moreover, molecular docking and drug repurposing results showed that the complex was also matched in terms of structure and chemical-protein interactions. These results indicated that $RAR{\alpha}$ may be a potential target of Tanshinone IIA for APL. The study can provide useful information for further biological and biochemical research on natural compounds.

• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 1999년도 봄 학술발표회 논문집(I)
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• pp.52-57
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• 1999

The aimed of this study is to analyze the qualities of foundry waste sand and the basic physic of the concrete mixed with the foundry waste sand, as a way of study for reusing the foundry waste sand disused in the foundry as the fine aggregate for concrete. According to the experimental results, the foundry waste sand is composed of silica ore whose main ingredient is SiO2 and doesn't produce harmful objects of hydration reaction, and the fluidity of concrete shows a decline with the increase of replacement ratio of foundry waste sand, and the compress strength, the tensile strength, the elastic modulus of concrete containing foundry waste sand are improved at the replacement rate of 25%.

• 유변학
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• 제3권2호
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• pp.175-185
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• 1991

Sodium octylbenzenesulfonate(SOBS)와 sodium dodecylbenzenesulfonate(SDBS)를 폴리프로필렌(PP) 용융액에 각각 균일하게 서로 다른 함량으로 섞어 넣은 후에 용융압착법 으로 PP 필름을 제조하였다. 저장 점성도(η＇) 저장탄성률(G＇) 및 손실 탄성률(G＂)을 진 동식 레오미터를 사용하여 170~195$^{\circ}C$에서 측정하였다. 실험온도 범위내에서 첨가제를 함유 한 PP와 순PPrks에 Cole-Cole 플롯(G＇에 대한 G＂의 log-log 플롯)에는 차이가 없었다. 그러나 광범위한 전단속도에서 SOBS의 첨가량이 8%를 넘어서면서 η＇과 G＇은 증가하였 다. 이러한 현상은 PP 중에서의 첨가제의 응집효과로 설명되었으며 이것은 SOBS와 SDBS 를 함유하는 PP 필름의 시차 주사열량법 및 주사전자 현미경 관찰결과로 확인되었다. SDBS를 8% 미만 함유하는 PP로부터 섬유의 용융방사가 가능하였으나 SDBS3% 이상 함 유PP 방사섬유는 연신 과정중에 섬유의 절단이 이따금 일어났다. PP 기질내에 있어서의 SDBS의 뜨거운 물에대한 견뢰성을 SDBS와 C. I. Basic blue 41사이의 이온결합 형성 거동 에 바탕을 두어 가시분광법에 의하여 검토하였다.