• Applied Chemistry for Engineering
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• v.8 no.6
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• pp.1006-1013
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• 1997

This study was carried out to elucidate the chemical characteristics of mutual separation for Am and Eu, which were selected as a stand-in from minor actinide and rare earth elements, by solvent extraction with di-(2-ethylhexyl)phosphoric acid containing zirconium at batch system. As results, 92.3% of Am and 99.1% of Eu were coextracted with 1M DEHPA/n-dodecane containing zirconium (Zr $concentration=8.7g/{\ell}$) at 0.5M $HNO_3$ in the extraction step. The extraction yields of Am and Eu were proportionally increased with the concentration of Zr in Zr salt of 1M DEHPA/n-dodecane having the synergistic effect. In the lst stripping step for the selective separation of Am, 38.1% of Am and 3% of Eu were stripped with the mixed solution of 0.05M DTPA and 1M lactic acid adjusted pH of 3.0. At that time, the separation factor calculated from the distribution coefficients of Am and Eu was 14.2. In the 2nd Stipping step to remove the Eu remained the organic phase after the lst stripping step, 94.4% 0f Eu was stripped into aqueous phase with 6M $HNO_3$.

• Resources Recycling
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• v.17 no.3
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• pp.29-34
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• 2008

Solvent extraction behaviors of iron(III) from chloride solution at high ionic strength condition between Alamine336 and TBP were compared by using MaCabe-Thiele diagram. Extraction isotherms of iron by the two extractants were obtained by calculating the equilibrium concentrations of iron in both phases from the initial extraction conditions. In calculating the equilibrium concentration of iron, chemical equilibria in the aqueous phase and mass balance together with the solvent extraction reaction were considered. MaCabe-Thiele diagram of iron by 1M Alamine336 indicated that two extraction stages could lead to complete extraction of 0.5M iron from 3M HCl solution at an A/O ratio of 6/5. The extraction power of 1M Alamine336 was found to be the same as 2-3M TBP. MaCabe-Thiele diagram together with the physical properties of the two extractants indicated that Alamine336 is superior to TBP in extracting ferric iron from chloride solution.

• Resources Recycling
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• v.28 no.1
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• pp.55-61
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• 2019

The extraction behavior of Mo(VI) and W(VI) from dilute chloride solution was investigated by employing amine (Alamine308 and TEHA) and neutral extractants (TOP) in the solution pH range from 2 to 9. W (VI) was selectively extracted over Mo(VI) by these three extractants and TEHA led to the highest separation factor. Without the pretreatment protonation of the tertiary amines, the extraction percentage of the two metal ions decreased steadily to zero as solution pH increased to 9. The extraction behavior of the metals was discussed on the basis of the distribution diagram of each metal. Alamine 308 and TEHA were much better than TOP in extracting and separating the two metal ions.

• Journal of Periodontal and Implant Science
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• v.36 no.1
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• pp.179-194
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• 2006

목적 : 이번 연구에서는 일반인의 치주질환 치료제에 대한 인식도를 설문을 통하여 알아보았고 현재 국내에서 시판중인 치주질환, 치료제를 의약품 검색 사이트를 이용하여 조사하였다. 조사한 치료제의 효과를 해당 약품의 성분과 관련된 문헌을 고찰함으로써 알아보았다. 재료 및 방법 : 일반인의 치주질환 치료제에 대한 인지도를 조사하기 위하여 열 개의 문항으로 구성된 설문을 실시하였다. 설문은 한림대학교 성심병원 산업의학과에 정기 건강검진을 위하여 내원한 사람들을 대상으로 하였다. 보건복지부에 등록된 치주질환 치료제를 조사하기 위하여 킴스 온라인 홈페이지를 이용하였다. 의약품 종합 검색 페이지에서 '추가조건 입력하기'의 '복지부 분류'란에 '231. 치과-구강용약'의 조건을 주어 검색하였다. 검색 결과로부터 경구 치주질환 치료제를 구별하여 정리하였다. 치주질환 치료제와 관련된 문헌을 조사하기 위하여 미국 국립도서관의 검색 서비스인 Pubmed 홈페이지를 이용하였다. 검색어는 각 지료제의 성분명과 치은염, 치주염, 치주질환의 조합어를 사용하였다. 결과 : 설문에 참여한 사람은 100명이었다. 이 중 85%는 치주질환이라는 말을 들어본 적이 있었으며 72%는 자신의 치주건강상태가 좋지 않다고 생각하였다. 14%는 치주질환 치료제를 복용한 경험이 있었다. 61%는 치주질환 치료제에 관한 정보를 광고로부터 획득하였다. 향후 치주질환 치료제의 선택과 관련하여 35%는 치과의사에게, 24%는 의사에게 그리고 20%는 약사에게 문의하겠다고 대답하였다. 치주질환 치료제는 70개였다. 이 중 38개는 아스코르빈산 제제, 25개는 옥수수 불검화 추출물 제제, 5개는 저용량 독시싸이클린 제제였고 아보카도-콩 불검화물과 동양의학적 제제가 각각 한 개였다. 결론 : 치주질환 치료제에 대한 일반인의 인지도는 비교적 낮았으며 정보를 획득하는 주요 경로는 광고였다. 일반인들이 치주질환 치료제를 선택하는 데 치과의사는 큰 역할을 하지 못하였다. 시판중인 치주질환 치료제는 70개였다. 치료제는 다섯 개의 군으로 분류할 수 있었으며, 아스코르빈산 제제, 옥수수 불검화 추출물 및 저용량 독시싸이클린이 대부분이었고 아보카도-콩 불검화물과 동양의학적 제제는 각각 한 개였다. 옥수수 불검화 추출물과 저용량 독시싸이클린은 임상 연구에 의해 그 효과가 입증되었으나 아스코르빈산 제제는 임상 연구가 없었으며 따라서 이상적인 제제라고 할 수 있다. 기존의 문헌에 기초하여 볼 때 옥수수 불검화 추출물과 저용량 독시싸이클린만이 전통적인 치주질환 치료법(SRP)과 병행하여 치료제로 사용될 수 있다.

• Journal of Digital Convergence
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• v.16 no.6
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• pp.353-361
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• 2018

RFW and RFE of castor fruit selected as part of the development of natural antimicrobials and antioxidants yielded 15.8% and 18.4% respectively. In the results of measuring the antimicrobial activity through paper disc method, the antimicrobial activity of castor fruits in ethanol extracts appeared. Especially, the activity was excellent in P. aeruginosa and S. aureus, and antimicrobial activity of C. was 1.5mm up to 16 hours. However, the proliferation of C. was observed again after 24 hours. In the MIC experiment results of RFE, S. aureus and P. aeruginosa showed 96% and 93% of antimicrobial activity, respectively. The DPPH radical scavenging activity of RLW and castor leaf ethanol extract showed $1.8{\pm}0.6%$ and $2.1{\pm}0.7%$ free radical scavenging activity at $1000({\mu}g/m{\ell})$. This study is expected to provide basic data for the development of antimicrobial agents and antioxidants using natural products.

• Resources Recycling
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• v.16 no.3 s.77
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• pp.34-43
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• 2007

A comparative study of the extraction behavior of vanadium and titanium in sulphate solutions using Cyanex272, PC88A and Alamine336 has been carried out. effect of pH in sulphate solutions, concentration of extractant and extraction isotherms has been studied. Solvent extraction separation studies of vanadium and titanium from the mixed solutions were also carried out in order to obtain a criterion for choosing the more effective extraction regent. From the experimental results, it was conformed that Alamine336 was good extractant to extraction of vanadium and separation from titanium from the mixed solutions.

• Resources Recycling
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• v.30 no.5
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• pp.32-37
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• 2021

Thorium extraction and possible separation from monazite leaching solution was studied. Primary amine Primene JM-T was select ed for t horium ext ract ion processing. Various experiment s were t est ed and est ablished for t he t horium liquid -liquid extraction process. The screening of extractant, lower pH conditions, extractant variation and extraction isotherms construction, and finally, stripping studies were established.

• Proceedings of the Membrane Society of Korea Conference
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• 1994.10a
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• pp.84-85
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• 1994

본 연구는 수용상에 포함된 중금속이온중 에멀젼 액막법(Emulsion Liquid Membranes, ELM)을 이용하여 납이온을 제거시키기 위한 연구이다. 지금까지 수용액상의 중금속 이온의 제거는 전통적으로 이온 침전법을 사용하여 왔다. 그러나 이 방법은 스럿지 처리문제가 남아 있고 식수로 이용되는 수처리에는 식수기준 만족도 때문데 적합하지 않았다. ELM법에 의한 금속이온 제거처리는 전기도금에 의하여 중금속이온을 회수할 수 있고 고도의 수처리를 가능케하여 최근 많은 관심을 갖고 있다. 본 연구에서는 납 이온 추출제로서 D2EPHA와 Alamine336의 이온교환제를 사용하여, 이 씨스테므이 추출 평형자료를 구하고 pH, 추출제의 농도, 교반속도, 에멀젼비율등에 의한 추출효과등을 검토하였다. 또한 2단계 추출 방법을 사용하여 금속이온추출에서 가장 큰 문제점인 유기상 용액의 leakage를 해결하고자 하였다.

• Journal of Convergence for Information Technology
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• v.9 no.11
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• pp.254-258
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• 2019

To protect healthy and beautiful hair, the hair protection effect was tested by adding an aloe extract from the hair solution. The treatment groups were grouped into four categories: Group II (Famma Treatment Only), Group III (Oxidase+aloe), Group IV (Reduce+aloe), and Group V (Oxidase+aloe, Release+aloe). The test hair is collected from women's hair in their 20s, 30s and 40s who have not undergone chemical treatment such as permanent and dying for one year and use 100% aloe stock solution. In order to evaluate hair thickness, cuticles, tensile strength, elongation and formation rate, the experiment environment was 28.9 degrees and 72% humidity. All statistical tests were done at 5% significant level. Cuticle, elongation, and formation rate were significantly improved (P<.05) and cuticle was best in group V, elongation was group III. In conclusion, aloe added to perm treatment were effective in improving cuticle, elongation rate, and formation of hair.

• Science of Emotion and Sensibility
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• v.13 no.2
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• pp.327-336
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• 2010

The purposes of this study are to evaluate mechanical properties and sensibility of tencel jacquard fabrics treated with ginkgo biloba extract and silicon softener, and to contribute to the research and development of the bedclothes made of the tencel jacquard fabrics. Mechanical properties and objective fabric hand evaluation were measured by using KES-FB system. Subjective sensibilities such as sensory, touch, and purchasing preference were estimated by using blind field test. The tensile properties such as EM, WT, and RT of tencel jacquard fabrics treated with ginkgo biloba extract and silicon softener showed increase. Bending properties and shear properties were decreased, but compression properties were increased compared to untreated fabric. With ginkgo biloba extract and silicon softener treatment, thickness and weight were increased. Therefore, tencel jacquard fabrics became more stretchable, softer, and bulkier than untreated fabrics. Consequently, THV of tencel jacquard fabrics treated with ginkgo biloba extract and silicon softener were increased. When fabrics were treated sequentially with ginkgo biloba extract and silicon softener, fabrics were estimated softer, more flexible, and bulkier than untreated fabrics. Also, tencel jacquard fabrics treated with ginkgo biloba extract and silicon softener were estimated to have good touch and preference.