• 한국지역사회생활과학회지
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• 제14권2호
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• pp.125-130
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• 2003

To develop natural dyeing materials from the unused plant materials, we had several dyeing experiments to investigate the optimum conditions of dyeing fabrics with the dyebath extracted from wisteria. Dyeing experiments were done under different dyeing conditions of dyeing temperature, pH of dyebath, dyeing time, concentration of dyebath and mordant treatment which were treated after dyeing. Experimental fabrics were silk, wool, cotton, ramie and hemp. Color difference(ΔE) and Munsell's HV/C of the dyed fabrics and color fastness of silk and cotton fabrics to dry cleaning, washing, rubbing, perspiration and light were measured. In silk and wool fabrics(non mordant, dyeing time-20min), color differences increased in case of dyeing temperature of $100^{\circ}C$, but in cotton, ramie and hemp fabrics, color differences did not increase. Without mordant treatment, color differences of all experimental fabrics were about 10-20, so in wisteria dyeing mordant treatment was necessary. Color differences were increased by the mordant treatment; the color of dyed fabrics with Al mordant is dull yellow, Cu mordant is gold and Fe mordant is olive tone. Color difference was not affected by pH of dyebath in all experimental fabrics. On the whole, the color fastness of dyed silk and cotton fabrics were good, but color fastness to washing and perspiration in Fe mordant was weak and improved in Cu mordant.

• 한국응용과학기술학회지
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• 제24권1호
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• pp.47-53
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• 2007

The acenaphthene(ACE) or acenaphthylene(ACEL) is one of the most frequently found compound in polycyclic aromatic hydrocarbon (PAH)-contaminated soil. In this study, we make 10mg/L ACE or ACEL in ethanol which is the model washing solvent for contaminated soil. This was followed by Fenton treatment in which 0.2 or 0.3mL of 30% $H_2O_2$ and 0.2 ml of 0.5 M $Fe^{2+}$ were added. The results showed more than 88 or 99% of ACE or ACEL removal efficiency, respectively. Additionally, we employed GC-MS to identify the main oxidation product generated by the optimized Fenton oxidation [i.e., ACE or ACEL degraded in to 21, 34 % 1,8-naphthalic anhydride(NAPAN), repectively]. It is expected that biodegradability of NAPAN is enhanced because NAPAN has three oxygens compared with ACE and ACEL. Therefore the results suggest that the hybrid treatment system (i.e., ethanol washing -Fenton oxidation treatment) can be effectively applied to remove ACE or ACEL from soil..

• 생명과학회지
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• 제22권12호
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• pp.1665-1671
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• 2012

본 연구는 양파껍질로부터 건강기능성식품 기능성원료로서의 양파껍질추출물의 표준화공정을 설정하고자 하였으며, 제조과정 중 지표물질의 추출효율 증대 및 잔류농약 안정성 확보를 위해 여러 세척공정을 통한 quercetin 함량 및 잔류농약 잔존율을 분석하였다. 양파껍질(A)을 1차 1종세척제(이하 세척제) 수세후 건조한 처리구(B), 2차 세척제 처리구(C), 초음파+세척제 처리구(D), 과산화수소+세척제 처리구(E) 및 데치기+세척제 처리구(F)로 처리한 다음 주정추출후 농축 및 진공동결건조하여 양파껍질추출분말을 제조하였다. 양파껍질추출물의 수율 및 지표물질인 quercetin의 수율을 고려하면 과산화수소처리+세척제 처리구(E)가 B처리구에 비해 각각 89.04% 및 96.84%로 추출효율이 가장 높게 나타났다. 모든 시료에서 총 177종의 농약성분 중 cyhalothirn, fluquinconazole 및 procymidone, 3종만이 검출되었는데, cyhalothirn (생양파 허용기준; 0.5 mg/kg), fluquinconazole (0.2 mg/kg)은 각각 0.37-0.68 mg/kg 및 0.35-3.28 mg/kg으로 농축도(27-60배)를 고려하면 허용기준에 안정하였으나 procymidone은 함량이 128.01~133.67 mg/kg으로 높았다. 따라서 양파껍질추출물의 표준화공정을 위해서는 추가적인 물리적 전처리 공정이 필요한 것으로 사료되었다.

• 한국농업기계학회:학술대회논문집
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• 한국농업기계학회 1997년도 동계 학술대회 논문집
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• pp.313-320
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• 1997

• 한국원자력학회:학술대회논문집
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• 한국원자력학회 2002년도 춘계공동학술발표회요약집
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• pp.299-299
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• 2002

• 한국방사성폐기물학회:학술대회논문집
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• 한국방사성폐기물학회 2019년도 춘계학술논문요약집
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• pp.233-234
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• 2019

• 한국식품과학회지
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• 제44권5호
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• pp.628-633
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• 2012

위생적인 배추 생산을 위해 전기분해수를 이용하여 미생물 저해효과와 잔류농약 제거효과에 대해 연구하였다. 대조구는 TW로 세척하였으며, 상업적으로 많이 사용되고 있는 NaOCl 용액으로 세척하여 비교하였다. 배추의 초기 총균수와 대장균군수는 각각 6.64, 3.56 log cfu/g 수준이었으며 침지 시간이 길어질수록 감소하는 경향을 나타내었다. 10분 경과 후, TW 처리구는 5.97 log cfu/g 수준이었으며 LAlEW와 SAcEW 처리구는 1.63-4.67 log cfu/g 수준으로 감소하였다. 특히 SAcEW-100처리구는 1.63 log cfu/g 수준으로 초기에 비해 5 log scale 이상 감소하여 가장 높은 효과를 나타내었다. 대장균군수는 초기에 3.56 log cfu/g 수준에서 10분 경과 후, TW와 NaOCl-50 처리구를 제외하고 검출되지 않았다. 잔류농약의 경우, 초기 chlorpyrifos, prothiofos 및 deltamethrin 함량은 각각 1.13, 1.91 및 0.67 ppm이었다. 세척 후, TW 처리는 32.28-38.46% 감소하였으며 NaOCl 처리구의 감소율은 36.93-50.13%으로 TW의 1.5배 수준 감소하였다. LAlEW-100 처리구와 SAcEW-100 처리구의 감소율은 63.79-78.30% 감소하여 TW와 NaOCl 처리구에 비해 효과적이었다. 비타민 C함량은 세척수에 따른 차이를 보이지 않았다. 결과적으로 전기분해수는 품질에 영향을 주지 않으면서 미생물 제어와 잔류농약 제거에 효과가 있는 것으로 나타났다.

• 한국분말재료학회지
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• 제18권1호
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• pp.14-17
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• 2011

$TiO_2$ nanopowders with anatase structure were firstly prepared by controlling the pH value of a precursor solution without any heat-treatment at room temperature. The prepared $TiO_2$ nanopowders were hydrothermally treated in 10M NaOH solution at $170^{\circ}C$. Then, the samples were washed in DI water or 0.1M HCl. The $TiO_2$ nanotubes were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM) and transmission electron microscope (TEM). The gas sensitivity of $TiO_2$ nanotubes for toluene gas was also investigated. The results show that $TiO_2$ nanotubes can be prepared by hydrothermal treatment. The morphology of $TiO_2$ nanotubes prepared by 0.1M HCl washing is destroyed to some extent. $TiO_2$ nanotubes with DI water washing show better sensitivity than that with 0.1M HCl washing.

• 한국지역사회생활과학회지
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• 제17권1호
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• pp.79-86
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• 2006

This study purposes to find the best one for dyeing with artemisia in order to develop a more efficient method of dyeing with artemisia and investigates the antibiotic activities of artemisia. After dyeing cotton, rayon, silk, wool and nylon fabrics with dyebath extracted from artemisia, observation on dyeability by temperature, concentration and time has been carried out. And I took an observation on color change, color fastness to washing and color fastness to light after mordanting treatment. Also observation on the antibiotic properties of non-dyed fabrics, artemisia-dyed fabrics and artemisia-dyed fabrics with post-mordant has been performed to investigate the antibiotic activities of artemisia. And the following results have been obtained. 1. The dyeability of artemisia was better for protein fabrics such as silk or woo and amide-based synthetic fabrics like nylon than for cellulose fabrics such as cotton and rayon. 2. For all tested fabrics, the dyeability was increased as the concentration of artemisia dyebath, dyeing time and dyeing temperature was increased. Especially the dye ability for protein fabrics was most affected by the temperature, and high dyeability was obtained at high temperatures. 3. For the color fastness of artemisia-dyed fabrics with mordanting treatment, the color fastness to washing was good with grade of 4-5 while the color fastness to light ranged from grade 2 to grade 3, which requires improvement for practical use. 4. The artemisia-dyed fabrics were shown to have much higher antibiosis than the non-dyed fabrics, and the artemisia-dyed fabrics with mortanting treatment showed the following result; Cu 99.9%, Al 64% and bittern 64.7%.

• 멤브레인
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• 제25권2호
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• pp.180-190
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• 2015

강도가 강하고 내약품성, 무독성, 내연소성 등의 장점을 가지고 있는 PVDF (polyvinylidene fluoride) 나노섬유로 기공이 각각 0.3, $0.4{\mu}m$ 평막을 제조한 후, 그 평막으로 나권형 모듈을 각각 제작하였다. 그중 $0.3{\mu}m$ 모듈은 제조 시 부직포를 포함하지 않았고, 기공이 $0.4{\mu}m$ 모듈은 제조 시 부직포를 포함하였다. 카올린과 휴믹산으로 조제한 모사용액과 순수를 대상으로 두 모듈의 투과선속와 제거율을 비교하였고, 물 역세척을 실시한 후 회복률과 여과저항을 계산하였다. 또한, 기공이 $0.4{\mu}m$인 나권형 모듈을 사용하여 유량과 막간압력차가 처리율과 여과저항에 미치는 영향을 고찰하였다.