• 한국염색가공학회지
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• 제24권4호
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• pp.305-312
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• 2012

In this study, we investigated the effects of oxidative permanent hair coloring agents on the dyeability and the damage of human hair. p-phenylenediamine and toluene-2.5-diamine sulfate were used as a hair coloring agent precursers. The degree of dyeability was checked by the change of CIELAB $L^*$ value according to dyeing time. And the damage of hair was evaluated by the tensile strength and morphological change of hair in SEM. When the hair was dyed, the CIELAB $L^*$ value was decreased with dyeing time regardless of the type of precursers. But when the hair was dyed after nutritional treatment, the CIELAB $L^*$ value showed lower level. This means that the nutritional treatment covers the scale of hair and protects the hair from the chemicals.

• Bulletin of the Korean Chemical Society
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• 제12권4호
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• pp.429-433
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• 1991

The photoinduced electron transfer reactions of N,N,N',N'-tetramethyl-p-phenylenediamine (TMPD) in various polar solvents were studied by measuring time-resolved fluorescence. The temperature dependence on the fluorescence decay rate in acetonitrile, methanol, ethanol and buthanol was carried out to obtain the activation energy and Arrehnius factor for the photoinduced electron transfer reaction. It was found that as the dielectric constant of the solvent increases, the activation energy and the reaction rate increase. This implys that the Arrehnius factor is important in controlling the photoinduced electron transfer reaction rate. In water, TMPD exists in three forms (cationic, protonated and neutral forms) due to the high dielectric constant and strong proton donating power of water. The photoinduced electron transfer reaction was found to be very fast (< 50 ps) and also the long liverd component in the fluorescence decay profile attributable to the photoexcited protonated form of TMPD was observed. Probably, the reaction pathway and the reaction coordinate seem to be different depending on the solvents studied here.

• Advances in nano research
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• 제11권6호
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• pp.667-678
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• 2021

Multiwalled carbon nanotubes (MWCNTs) were first oxidized (O-CNTs) to introduce carboxylic group and then further functionalized (F-CNTs) with m-phenylenediamine, which was confirmed by FTIR and SEM. It was used as an effective adsorbent for the adsorptive removal of diclofenac drug from water. Under optimum conditions of pH 6, stirring speed 600 rpm, the maximum adsorption capacity obtained was 532 mg g^-1 which is superior to the values reported in literature. The adsorption was quite rapid as 25 mg L^-1 drug solution was adsorbed in only 3 minutes of contact time with 10 mg of adsorbent dose. The adsorption kinetics and isotherms were studied using various models to evaluate the adsorption process. The results showed that the data best fit in kinetics pseudo-second order and Langmuir isotherm model. Furthermore, the oxidized and functionalized MWCNTs were applied on gram-negative Escherichia coli and gram-positive Staphylococcus aureus using agar disc diffusion assay to validate their anti-microbial activity. Results were unique as both oxidized and functionalized MWCNTs were equally active against both E. coli and S. aureus. The newly synthesized F-CNTs have great potential in water treatment, with their dual action of removing drug and pathogens from water, makes it potential applicant to save environment.

• 한국식품영양과학회지
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• 제35권8호
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• pp.1010-1015
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• 2006

혼합 두발염색제의 독성을 확인할 목적으로 체중 $230{\pm}20\;g$의 Sprague-Dawley종의 흰쥐를 대조군, 6% 과산화수소 도포 실험군, 2% 암모니아 용액에 5% PPD를 용해시켜 도포한 실험군, 2% 암모니아 용액에 5% PPD와 6% 과산화수소의 동량 혼합액을 도포한 실험군 등 4군으로 분류하여 2일 간격으로 피부 표면적 $16.5\;cm^2$ 당 25 mg이 되게 5회 도포한 다음 피부조직의 손상 정도 및 ROS 생성계와 해독계의 활성변동을 관찰하여 다음과 같은 결과를 얻었다. PPD와 과산화수소 혼합액을 도포한 실험군에서 PPD를 단독 도포한 실험군에 비해 피부조직의 손상 지표인 ACP 활성이 현저하게 증가하였으며, PPD 단독 도포군의 조직병리에서는 관찰되지 않았던 진피층 내 모세혈관의 확장 등이 나타나는 것으로 보아 피부조직의 손상이 심화된 것을 확인할 수가 있었다. 이러한 실험 조건 하에서 ROS 생성계효소인 XO의 활성은 PPD와 과산화수소 혼합액 도포군에서 PPD 단독 도포군에 비해 현저하게 증가하였으며, ROS 해독계 효소들의 활성은 유의하게 감소하였다. 이상의 실험결과를 종합해 볼 때, PPD와 과산화수소 혼합액 도포군이 PPD 단독 도포군에 비해 XO의 활성이 현저하게 증가되어 과잉의 ROS를 생성시켜 ROS 해독계 효소의 활성을 억제함으로서 조직의 손상이 심화된 것으로 생각된다.

• 약학회지
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• 제36권1호
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• pp.7-11
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• 1992

2-Substituted benzimdazoles were prepared by reacting o-phenylenediamine with acid chlorides, which has advantages over the known synthetic procedures. The compounds prepared showed no significant antiinflammatory activity, thus are of no interest as antiinflammatory agents.

• 한국생명과학회:학술대회논문집
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• 한국생명과학회 2003년도 제39회 학술심포지움
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• pp.75-75
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• 2003

• 대한화학회지
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• 제55권2호
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• pp.304-307
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• 2011

• Bulletin of the Korean Chemical Society
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• 제30권7호
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• pp.1628-1630
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• 2009

• 한국염색가공학회:학술대회논문집
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• 한국염색가공학회 2010년도 제3회 국제학회
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• pp.79-79
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• 2010

In this work a PMTA(poly m-phenylene terephthal amide) polymer was synthesized by using new solvent to produce film composite. This Film composite membrane based on PMTA were prepared with 1,3-phenylenediamine(MPD), terephthaloyl chloride (TPC) and Co-solvent (NMP with added $CaCl_2$) was adopted for synthesize PMTA polymer. A series of synthetic experiments were done, aimed to find the optimum condition of polymerization.

• 공업화학
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• 제26권3호
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• pp.377-380
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• 2015

본 연구에서는 p-diiodobenzene (PDIB)으로부터 p-phenylenediamine (PPD) 합성 후 생성되는 부산물인 $NH_4I$를 PDIB 합성의 원료로 재활용하기 위하여 $I_2$ 회수 공정의 최적화에 관한 연구를 진행하였다. 양이온교환수지를 사용하여 $NH_4I$ 시약 용액으로부터 $I_2$ 회수에 관한 연구를 진행하였고 양이온교환수지의 파과곡선을 통해 파과점 및 관류교환용량을 조사하였다. 회수되는 요오드의 수율 및 순도 향상을 위해 $NH_4I$의 공급용액 및 산화제($H_2O_2$)의 농도 변화, 상온과 저온 건조공정 그리고 산화시간에 따른 순도와 수율을 측정하여 $NH_4I$ 용액으로부터 요오드를 회수하는 공정의 최적조건을 확립하였다. 또한 산화공정 후 발생하는 여액을 재사용하는 과정을 도입하여 실험한 결과 수율 94.96%, 순도 96.65%의 $I_2$를 회수할 수 있었다.