• Journal of Acupuncture Research
• /
• 제18권1호
• /
• pp.29-39
• /
• 2001

Purpose : It has been reported that Oyo-Tang has an effect on allergic asthma clinically. In order to investigate the herbal acupuncture solution of the Oyo-Tang on allergic asthma, the Oyo-Tang herbal-acupuncture(OTHA) was applied on BL13 and ST36 of allergic asthma model of the rats. Methods : Then the concentration of serum IgE and the ratio of CD4+ and CD8+ T-cells in peripheral blood were measured and compared with control group. Results : The results obtained as follows; 1. The concentration of serum IgE was decreased significantly in both of the OTHA on BL13 group and on ST36 group as compared to control group. 2. The ratio of CD4+ and CD8+ T-cells in peripheral blood was not different statistically between the normal, the control, the OTHA on BL13 and the OTHA on ST36 group.

• Ocean Science Journal
• /
• 제41권1호
• /
• pp.43-51
• /
• 2006

Concentration and distribution of Fe, Zn, Cu, Cd, Mn, Pb, Ni among subcellular fractions (cellular membrane structures and cytosol) and Zn, Cu, Cd among cytoplasmic proteins in the kidney and digestive gland of mussel Modiolus modiolus living along a polymetallic concentration gradient were studied. It was found in the kidney of M. modiolus from contaminated sites that the Fe percent increased in the "membrane" fraction, whereas Zn, Pb, Ni and Mn percent increased in the cytosol compared to the kidney of the control mussel. Note kidney cytosol of M. modiolus from clean and contaminated sites sequestered major parts of Cu and Cd. In the digestive gland of M. modiolus from contaminated sites Fe, Zn, Cd, Mn, Ni percent increased in the "membrane" fraction, whereas Cu, Pb percent increased in the cytosol compared to digestive gland of control mussel. Gel-filtration chromatography shows kidney of M. modiolus contains increased metallothionein-like protein levels irrespective of ambient dissolved metal concentrations. It was shown that the metal detoxification system in the kidney and digestive gland of M. modiolus was efficient under extremely high ambient metal levels. However, under complex environmental contamination in the kidney of M. modiolus, the metal detoxification capacity of metallothionein-like proteins was damaged.

• 대한전자공학회논문지TE
• /
• 제37권5호
• /
• pp.1-6
• /
• 2000

고순도 적색 발광을 얻기 위하여 진공증착법으로 스쿠아릴늄 색소(Sq)를 첨부한 알루미늄퀴롤린착체 (Alq3)를 발광층으로 사용하는 유기발광소자를 제작하였으며, 소자의 발광특성 및 전기적 특성을 조사하였다. 스쿠아릴늄의 발광 피이크 파장은 670㎚이고 발광강도가 절반이 되는 파장 폭은 30㎚이었다. 스쿠아릴늄의 적색발광은 도핑 농도가 15㏖% 이상에서 고순도 적색 발광특성이 관측되었지만, EL효율은 10/sup -2/W 이하이고 휘도는 0.21cd/㎡, 0.1cd/㎡ 정도로 매우 낮았다. 스쿠아릴늄 분자가 Alq3 분자 내에 트랩 된다고 하더라도 도핑농도가 5㏖% 이상인 경우에 캐리어 드래프트로 작용한다.

• Bulletin of the Korean Chemical Society
• /
• 제34권10호
• /
• pp.2959-2962
• /
• 2013

As the concentration of aqueous $CD_3OH$ solutions was decreased, the OD peaks in $^2H$ NMR spectra grew relative to the $CD_3$ peaks. Isotope impurity for OH groups of $CD_3OH$ and deuterium naturally present in water contributed to the OD peaks. Using these peak area data, the site-specific isotope populations of isotope enriched chemicals were measured. In addition, the method using both $^1H$ and $^2H$ NMR spectroscopy was demonstrated with neat $CD_3OH$ to measure the site-specific isotope populations. The results indicate that although it represents only ~0.015% of hydrogen isotopes, the deuterium naturally present in solvents cannot be ignored, especially when the concentration of deuterium-enriched solutes is varied. Proton/deuteron exchange between methyl and methyl/hydroxyl groups was confirmed to be negligible, while that among hydroxyl groups was detectable.

• Journal of Applied Biological Chemistry
• /
• 제63권2호
• /
• pp.125-129
• /
• 2020

Environmental pollution caused by various heavy metals is a serious global problem. To solve this problem, microbial bioremediation of contaminated metals has developed rapidly as an effective strategy when physical and chemical techniques are not suitable. In this study, cadmium (Cd)-tolerant soil bacteria were isolated via artificial induction in laboratory conditions instead of screening bacteria naturally adapted to metal-contaminated soils. Wild-type (WT) bacteria grown in uncontaminated soils were artificially and sequentially adapted to gradually increasing Cd concentrations of up to 15 mM. The resultant cells, named Soil-CdR15, survived at a Cd concentration of 10 mM, whereas WT cells failed to survive with 4 mM Cd on solid media for 2 d. In liquid media containing Cd, the SoilCdR15 cells grew with 15 mM Cd for 7 d, whereas the WT cells could not grow with 5 mM Cd. Both Soil-CdR15 and WT cells removed approximately 35% of Cd at the same capacity from liquid media containing either 0.5 or 1.0 mM Cd over 2 d. In addition to Cd, the Soil-CdR15 cells showed increased resistance to nickel, zinc, and arsenic compared to WT cells. The Soil-CdR cells were identified as Burkholderia sp. by partial sequencing of 16S rRNA. The data presented in this study demonstrate that isolation of heavy metal-tolerant microorganisms via artificial induction in laboratory conditions is possible and may be useful for the application of the microorganisms for the bioremediation of heavy metals.

• 한국토양비료학회지
• /
• 제22권2호
• /
• pp.111-115
• /
• 1989

비오염지토양(非汚染地土壤)에 카드뮴을 15ppm 처리(處理)하고 비식용작물(非食用作物)인 섬유작물(纖維作物) 6종(種), 화훼작물(花卉作物) 4종(種), 묘목(苗木) 2종(種)과 수도(水稻)를 비교작물(比較作物)로 Pot 재배(栽培)하고 그 함량(含量) 및 흡수량(吸收量)을 조사(調査)한 결과(結果)를 요약(要約)하면 다음과 같다. 1. 식물체중(植物體中) 카드뮴 함량(含量)은 마리골드가 161.7ppm으로 수도(水稻)의 22.5배(倍)로 가장 높았으며, 왕골은 58.3ppm, 코레옵시스 58.0ppm, 해바라기 43.5ppm, 수세미 38.3ppm, 아마(亞麻) 31.9ppm의 순(順)으로 적었다. 2. 카드뮴의 흡수량(吸收量)은 은수원사시나무에서 24.11mg/pot로 가장 많았으며 수도(水稻)의 35.5배(倍)이었고 이타리안 포프라는 10.86mg/pot, 마리골드 9.61mg/pot, 양마(洋麻) 9.04mg/pot 등의 순위(順位)였다. 3. 토양중(土壤中) 카드뮴의 잔존량(殘存量)은 은수원사시나무가 재배(栽倍)된 토양(土壤)이 가장 적고 다음이 목화재배토양(木花栽培土壤)이였다. 4. 카드뮴의 식물체흡수량(植物體吸收量)과 토양중(土壤中) 잔존농도(殘存濃度)와는 유의성(有意性) 있는 부(負)의 상관(相關)이 있었다.

• 한국환경농학회지
• /
• 제20권3호
• /
• pp.175-179
• /
• 2001

우리나라 주요 밭작물의 생육에 미치는 카드뮴의 영향을 구명하기 위하여 토양 중 카드뮴의 농도를 무처리, 5, 10, 25, 50, 100 mg/kg을 처리한 후, 배추, 무, 상추를 재배하여 작물의 생육피해양상과 작물체내 카드뮴의 흡수정도를 조사하였다. 카드뮴에 의한 생육피해 증상은 배추, 상추에서 발아 후 생육초기 생육저해와 잎 가장자리부터의 황백화 현상이 관찰되었다. 5%의 유의적인 생육 및 수량의 감소를 초래하는 생육 피해농도는 배추가 $50{\sim}100$ mg/kg, 상추는 $10{\sim}25$ mg/kg이었으나, 무는 100 mg/kg일 때에서도 생육저해를 받지 않아 작물에 따른 피해 농도가 다름을 알 수 있었다. 토양중 카드뮴 농도가 증가함에 따라 작물 가식부위별 생체중 카드뮴 함량은 상추는 5 mg/kg 배추와 무는 25 mg/kg부터 유의적으로 증가하였으며, 가식 부위의 카드뮴 함량은 토양 중 카드뮴 농도가 5 mg/kg일 때 상추, 배추, 무 각각 3.37, 0.13, 0.08 mg/kg F.W.이었다. 개체당 총 흡수량은 25 mg/kg이상의 고농도 카드뮴 토양에서는 배추 > 무 > 상추순으로 증가하였으나 10 mg/kg 아래의 저농도에서는 상추의 흡수량이 배추나 무보다 높았다.

• 한국환경과학회지
• /
• 제8권2호
• /
• pp.249-254
• /
• 1999

The biosorption and desorption of Cd were carried out using brown marine algae, known as the good biosorbent of heavy metals. The content of alginate bound to light metals could be changed by the physical and the chemical pretreatment of Sargassum fluitans biomass. The Cd uptake was independent of the alginate content. In case of protonated biomass, Cd uptake was the lowest because the alginic acid of biomass was dissolved to cadmium solution during the biosorption. The maximum Cd uptake of Sargassum biomass was ranged from 79 mg/g to 139 mg/g. In case of raw biomass, the higher the alginate content of biomass, the higher was the Cd uptake. 100% of Cd and light metals sorbed in the biomass were eluted at 0.1N HCI(pH 1.1). However, the elution efficiency in $CaCl_2$ and $Ca{(NO_3)}_2$solution was varied by the concentration, the solid to liquid ratio and the pH of calcium solution. The distribution coefficient between Cd and protons in the desorption solution at pH ranged from 1.6 to 2.9 was observed on the constant stoichometric coefficient(1.3).

• 한국신재생에너지학회:학술대회논문집
• /
• 한국신재생에너지학회 2011년도 추계학술대회 초록집
• /
• pp.57.1-57.1
• /
• 2011

We studied the performance of CdSe nanoparticle in the active layer of organic photovoltaics (OPVs) by changing concentration of the CdSe NPs in the P3HT:PCBM layer. We observed that the absorption peak value gradually increases with the increasing amount of CdSe NPs at 600nm wave length. However, the electrical properties of OPVs correspond less with the tendency of UV/visible result. The highest performance was shown with 10% of CdSe NPs. The device performance decreased after 10% of CdSe NPs, this shows the dependencies of performanc of hybrid solar cells on the CdSe NPs loading amount. The resulting OPVs with 10 % of CdSe NPs show a short circuit current density ($J_{sc}$) of $6.96mA/cm^2$, open circuit voltage ($V_{oc}$) of 0.61V, fill factor (FF) of 0.59, and power conversion efficiency (PCE) of 2.53% under AM 1.5 ($100mW/cm^2$).

• 한국전기전자재료학회논문지
• /
• 제24권8호
• /
• pp.616-621
• /
• 2011

In this paper, CdS thin films, which were widely used window layer of the CdTe and the Cu(In,Ga)$Se_2$ thin film solar cell, were grown by chemical bath deposition, and effects of pH of reaction solution on the structural and optical properties were investigated. For pH<10.5, as the pH of reaction solution was higher, the deposition rate of CdS films was increased by improving ion-by-ion reaction in the substrate surface and the crystallinity of the films was improved. However, when the pH was higher than 10.5, the deposition rate was decreased because of smaller $Cd^{2+}$ ion concentration in the reaction solution. Also, the crystallinity of the films were deteriorated. The CdS films deposited at lower pH showed poor optical transmittance due to adsorbed colloidal particles, while the transmittance was improved for higher pH.