• 청정기술
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• 제19권3호
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• pp.249-256
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• 2013

본 연구에서는 프린터 토너의 대전량 제어제로 사용되는 아연 착화합물 제조시 금속염과 다가알코올을 첨가함에 따라 변화되는 입자 형태, 평균 입도 및 마찰대전량에 대해 고찰하였다. 아연 착화합물을 제조하기 위해 염화아연과 3,5-di-tert-butyl salicylic acid를 사용하였다. 다가알코올을 첨가함에 따른 입자 형태 변화를 확인하기 위해 아연 착화합물 제조시 폴리에틸렌 글리콜(PEG-300), 글리세린 및 에틸렌글리콜을 첨가하였고, 금속염인 염화알루미늄을 첨가함으로써 변화되는 입자크기를 확인하였다. 또한 금속염과 다가알코올을 동시에 첨가하여 입도 변화를 확인한 결과, 각각 단독으로 첨가 했을 때보다 아연착화합물의 평균 입도가 더 많이 감소하는 것을 확인할 수 있었다. 특히, 알루미늄 착화합물의 함유량이 30 wt%이고 염화아연에 대한 PEG-300의 몰비를 3으로 하였을 때 아연 착화합물의 평균 입도가 $2.33{\mu}m$로 순수한 아연 착화합물의 평균 입도인 $5.28{\mu}m$의 44.1%로 가장 많이 감소한 것을 알 수 있었다.

• 공업화학
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• 제23권1호
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• pp.8-13
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• 2012

본 연구에서는 프린터 토너의 대전량 제어제로 사용되는 아연 착화합물 제조시 금속염과 다가알코올을 첨가함에 따라 변화되는 입자 형태와 평균 입도에 대해 고찰하였다. 아연 착화합물을 제조하기 위해 염화아연과 3,5-di-tert-butyl salicylic acid를 사용하였다. 다가알코올을 첨가함에 따른 입자형태 변화를 확인하기 위해 아연 착화합물 제조시 polyethylene glycol (PEG-300), glycerin 및 ethylene glycol을 첨가하였고, 금속염인 지르코늄 옥시클로라이드를 첨가함으로써 변화되는 입자크기를 확인하였다. 또한 금속염과 다가알코올을 동시에 첨가하여 입도변화를 확인한 결과, 각각 단독으로 첨가했을 때보다 아연 착화합물의 평균 입도가 더 많이 감소하는 것을 확인할 수 있었다. 특히, 지르코늄 착화합물의 함유량이 30 wt%이고 염화아연에 대한 PEG-300의 몰비를 3으로 하였을 때 아연 착화합물의 평균 입도가 1.84 ${\mu}m$로 순수한 아연 착화합물의 평균 입도(5.28 ${\mu}m$)의 34.9%로 가장 많이 감소한 것을 알 수 있었다.

• 한국환경과학회지
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• 제5권3호
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• pp.317-327
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• 1996

This study was performed to develop the biological treatment technology of wastewater polluted with heavy metals. Zinc-tolerant microorganism, such as Pseudomonas chlororaphis which possessed the ability to accumulate zinc, was isolated from industrial wastewaters polluted with various heavy metals. The characteristics of zinc accumulation in the cells, recovery of the zinc from the cells accumulating zinc, were investigated. Removal rate of zinc from the solution containing 100 mall of Zinc by zinc-tolerant microorganism was more than 90% at 48 hours after inoiulation of the microorganisms. A large number of the electron-dense granules were found mainly on thIn cell wall and membrane fractions, when determined by transmission electron microscope. Energy dispersive X- ray spectroscopy revealed that the electron-dense granules were zinc complex with the substances binding Heavy metals. The zinc accumulated into cells was not desorbed by distilled water, but more than 80% of the zinc accumulated was desorbed by 0.1M-EDTA. The residues of the cells after combustion at 55$0^{\circ}C$ amounted to about 21% of the dry weight of the cells. EDS analysis showed that the residues were comparatively pure zinc compounds containing more than 79% of zinc.

• Molecular & Cellular Toxicology
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• 제3권2호
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• pp.132-136
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• 2007

Zinc is essential metal and plays a role in a wide variety of physiological and biochemical processes. Prostate gland contains high level of zinc, generally 3-10 folds higher than other organs. Prostatic zinc uptake is resulted from the existence of zinc transporter (ZnT) protein families in membrane. In this study, we investigated the difference of zinc uptake efficiency of zinc-aspartate complex (Zn-Asp) into various organs compared with $ZnSO_4$. We observed that Plasma zinc concentration in both $ZnSO_4$ and Zn-Asp administrated group was increased progressively following administration, and reached a peak level at 2 hr. The increasing pattern of zinc concentration was similar to each groups, however the zinc concentration of Zn-Asp administrated group was higher than that of $ZnSO_4$ administrated group. We found that prostatic zinc level of Zn-Asp administrated group was higher than $ZnSO_4$ administrated group, and was increased approximately $\sim$2.7 fold and $\sim$4.2 fold at 4 and 8 hr after administration. From these observations, we suggest than Zn-Asp has high uptake efficiency of zinc into the prostate gland. Therefore, Zn-Asp is potentially useful treatment of many prostatic diseases.

• Nuclear Engineering and Technology
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• 제11권1호
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• pp.47-54
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• 1979

수도(水稻)에 의한 $^{65}$ Zn 표지 및 비표지 아연비료의 잔류(殘留) 효과의 포장실험 결과를 요약하면 다음과 같다. 수량면에서 본 아연비료의 잔효(殘效)는 약간 있었다. 수량에 미치는 아연시비법(施肥法)의 영향을 보면 아연 건층시비가 포층시비 보다 효과가 컸다. 아연 시비 수준별로 본 수량은 5kg Zn/ha 전층 시비가 10, 20kg Zn/ha 건층시비 보다 좋았다. 아연비료 형태별로 수량을 비교해 보면 $^{65}$ ZnSO$_4$ 가 Urea-$^{65}$ Zn 복합비료 보다 좋았다. 이와 같은 경향은 1차년도 실험 결과와 같았다. 수도체(水稻體)의 아연 전 흡수량은 유기물 첨가토양(처리 2와 8)과 Urea-$^{65}$ Zn 복합비료 시용구에서는 전년도 보다 현저하게 증가되었다. 수도체의 % Zndff값은 전년도에 얻어진 값 보다 훨씬 감소되었다. 수도체의 비료 아연 흡수량은 대부분의 아연 처리구에서 전년도 보다는 약간 감소되었으나 유기물 시용토양에 아연을 전층시비했을 때와 Urea-$^{65}$ Zn 복합비료 시용구에서는 전년도의 값 보다는 오히려 증가되었다. 아연 전층시비법은 표층시비법 보다 수도체의 비료 아연 흡수량은 많았다. 수도체의 전아연 흡수량에 대해서 비료에 유래된 아연의 기여율은 4.6%-24.3% 범위하였다. 5kg Zn/ha 수준에서 $^{65}$ Zn 표지 아연 비료의 이용 효율은 0.213%-0.58%였다.

• 한국염색가공학회지
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• 제23권3호
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• pp.163-168
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• 2011

In this article, we synthesized an azo dye rotaxane containing bis(8-hydroxyquinoline) group and its polymeric metal complex with zinc. The azo dye rotaxane exhibits high pH sensitivity, solvatochromism and zinc (II) ion sensings in aqueous solution. These behaviors came from the tautomeric equilibrium between azo-hydrazone tautomers and the formation of extended conjugation. The structure of polymeric zinc complexed dye rotaxane was confirmed with NMR and FT-IR measurements. The existence of CD rings, provided by dye rotaxane formation, was found to be very beneficial in improving aqueous solubility of polymeric metal complex.

• Asian-Australasian Journal of Animal Sciences
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• 제17권12호
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• pp.1717-1724
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• 2004

The study was conducted to determine the effect of Salmonella typhymurium lipopolysaccharide (LPS) challenge on egg-laying performance, inflammatory response, zinc metabolism in layer fed diets supplemented with organic or inorganic zinc since 3-wk-old. The three dietary treatments were corn-soybean meal basal diet without supplemental zinc or with supplemental zinc at 60 mg/kg zinc from $ZnSO_4$ or zinc amino acid complex (ZnAA). At the age of 58 wk-old, twelve hens from each dietary treatment were allotted into two sub-groups. On day 1, 3, 5, 7 of the $58^{th}$ week of age, six birds of one sub-group were injected intraperitoneally (i.p.) with 2 ml LPS (1.0 $\ell$/ml) or sterile saline. Neither zinc source ${\times}$ immune challenge interaction nor zinc source effect on egg production performance was observed (p>0.05), LPS-challenge decreased egg production (p<0.04) and increased percentage of cracked eggs (p <0.01). With LPS challenged, the fever response of hens fed ZnAA peaked and subsided earlier than in hens fed $ZnSO_4$ or basal diet. Serum IL-1$\beta$ at 3 h was higher (p<0.01), but lower (p<0.001) at 12 h post-challenge with LPS in hens fed ZnAA than $ZnSO_4$. In salinetreated groups, serum IL 1$\beta$ was higher in hens fed ZnAA than the basal diet at 3 h post-injection (p<0.01). LPS-challenged birds had lower serum zinc and higher zinc sequestered in liver and spleen (p<0.001). In saline-treated birds, there was no difference in zinc concentration of serum, liver and spleen among different dietary treatments (p>0.05). Supplementation of 60 mg/kg zinc from either ZnAA or $ZnSO_4$ significantly (p<0.05) elevated metallothionein (MT) concentration in liver and spleen. MT concentration in liver of birds fed ZnAA diet was higher than in those fed $ZnSO_4$ diet (p<0.05). The magnitude of increase of hepatic and splenic MT due to LPS challenge was higher by supplementation of ZnAA than $ZnSO_4$. The results suggest that zinc amino acid complex enhanceed MT synthesis and zinc sequestered in liver and spleen and increased the sensitivity to immune response due to LPS challenge.

• 대한화학회지
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• 제7권3호
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• pp.216-224
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• 1963

有機含鹽素 에스테르, 알콜, 및 산과 金屬亞鉛 및 錫을 dimethyl formanmide 溶媒存在下에서 反應시킨 結果 有機金屬 콤프렉스를 좋은 收率로 生成하였다. 같은 反應을 混合紫外線照射下에서 進行시킨 結果 高溫 以外에서는 콤프렉스의 生成이 크지못하였다. D.M.F.에 依한 金屬 콤프렉스의 溶解效果는 토루엘이나 사이크로헥산보다 훨씬 컸었다. 鹽素를 含有한 酸에서는 酸의 金屬鹽의 金屬 콤프렉스가 生成됨을 觀察하였다. 카보닐 precursor와의 反應에 있어서는 少量의 雙合物과 함께 附加物을 生成하였으나 收率이 높지 못하였다(산 30∼40%, 에스테르 73%, 알콜 14.6%). 그러나 이 方法은 從來法에 比하여 簡便한 것임을 알았다. 硏究結果를 溶媒效果에 關聯시켜 論議하였으며 實驗方式을 報告하였다.

• 한국자원리싸이클링학회:학술대회논문집
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• 한국자원리싸이클링학회 2006년도 춘계임시총회 및 제27회 학술발표대회
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• pp.78-85
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• 2006

In textile industries, waste effluent containing zinc is generated during the manufacture of rayon yarn from the wood pulp or cotton linters. Due to the strict environmental regulations and the presence of toxic metallic and other constituents, the discharge of industrial effluents in the sewage or disposal of solid sludge as landfill is restricted. Before recycling of zinc as zinc sulphate solution to the spinning-bath of the rayon manufacturing plant the zinc sulphate solution must be free from calcium, which is deleterious to the process as gypsum precipitates with the increase in concentration and forms scale in the bath. In the present work an attempt has been made to develop a process following solvent extraction technique using thiophosphinic extractants, Cyanex 272 and 302 modified with isodecanol and diluted in kerosene to recover zinc from rayon effluent. Various process parameters viz. extraction of zinc from different concentration of solution, distribution ratio, selective extraction, O/A ratio on extraction and stripping from the loaded organic, complex formation in the organic phase etc. have been studied to see the feasibility of the process. The extractant Cyanex 302 has been found selective for the recovery of 99.99% of zinc from the effluent above equilibrium pH 3.4 maintaining the O/A ratio of 1/30 leaving all the calcium in the raffinate. It selectively extracted zinc in the form of complex $[R_{2}Zn.3RH]_{org}$ and retained all the calcium in the aqueous raffinate. The zinc from the loaded Cyanex 302 can be stripped with 10% sulphuric acid at even O/A ratio of 10 without affecting the stripping efficiency. The stripped solution thus obtained could be recycled in the spinning bath of the rayon plant. The raffinate obtained after the recovery of zinc could be disposed safely without affacting environment.

• 분석과학
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• 제18권5호
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• pp.386-390
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• 2005

The zinc(II) complex, $Zn(NCS)_2(C_3H_4N_2S)_2$, I, has been synthesized and characterized by single crystal X-ray diffraction, thermal analysis and infrared spectroscopy. The complex I crystallizes in the triclinic system, $P\bar{1}$ space group with a = 7.587(1), b = 8.815(1), $c=12.432(2){\AA}$, ${\alpha}=75.584(8)$, ${\beta}=83.533(9)$, ${\gamma}=68.686(8)^{\circ}$, $V=750.0(2){\AA}^3$, Z = 2, $R_1=0.036$ and ${\omega}R_2=0.101$. The central Zn(II) atom has a tetrahedral coordination geometry, with the heterocyclic nitrogen atoms of 2-aminothiazole ligands and the nitrogen atoms of isothiocyanate ligands. The crystal structure is stabilized by one-dimensional networks of the intermolecular $N-H{\cdots}S$ hydrogen bonds between the amino group of 2-aminothiazole ligands and the sulfur atom of isothiocyanate ligands. Based on the results of thermal analysis, the thermal decomposition reaction of complex I was analyzed to have three distinctive stages such as the loss of 2-aminothiazole, the decomposition of isothiocyanate and the formation of metal oxide.