• 한국응용곤충학회지
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• 제9권1호
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• pp.1-6
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• 1970

1. 수도용 비수은계 살균제의 개발을 위해 PCP와 $CS_2$ 및 NaOH를 가지고 sodium pentachlorophenolxanthatethate를 합성하고 이에다 $CdCl_2$를 작용시켜 cadmium pentachlorphenolxanthate(Cd-PCP-xanthate)를 항성 하였다. 2. 시료 I, II, III, IV 및 V를 합성하여 화학분석 한 결과 시료 V가 가장 순도가 높았으며, 이의 분석치는 Cd-PCP-xanthate와 Cd-PCP가 약 $50\%$씩 함유된 것과 동일하다. 3. 시료 V를 가지고$ 50\%$ 수화제, $1.5\%$ 및 $1\%$ 분제를 조제하였다. 4. 살균효과시험은 수도의 깨씨무늬병균과 도열병균에 대하여 분생포자 발아 억제시험 및 균사신장억제 시험을 한 결과 포자발아억제효과는 10∼20ppm에서 유효하였고 균사억제효과는 $1.5\%$ 분제 30초 부착구에서 Ceresan 석회와 비슷한 결과를 보였다. 5. 수도에 대한 약해 시험결과는 약해를 볼 수없었다.

• 한국지하수토양환경학회지:지하수토양환경
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• 제13권2호
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• pp.44-53
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• 2008

폐탄처리과정에서 오염된 중금속 오염토양의 정화에 있어 무기산(HCl), 중성염($CaCl_2$), 킬레이트제(citric acid, $Na_2$-EDTA)들을 이용한 토양세척 가능성을 평가하였다. 실험에 사용된 추출액(HCl, $CaCl_2$, citric acid, $Na_2$-EDTA)들의 추출효율은 HCl > citric acid > $Na_2$-EDTA > $CaCl_2$의 순으로 나타났는데 HCl(1.0 M)에 의해서 Cd, Cu, Pb와 Zn이 초기농도 대비 각각 82%, 86%, 80%, 46% 정도 추출된 것으로 나타났다. 추출효율과 반응액의 pH 간에는 고도의 음의 상관관계가 존재하였다. 폐탄약처리장 부지 토양 중 중금속은 탄산염결합태, Fe, Mn-산화물 결합태 형태로 존재하고 있었는데 HCl, citric acid 세척에 의해서 이들 분획의 현저한 감소가 이루어졌지만 이동성이 상대적으로 큰 치환태가 증가되는 것으로 나타났다. 이동성이 큰 분획의 증가는 지하수 오염 등의 문제를 야기시킬 수 있음으로 이에 대한 적절한 관리가 필요할 것으로 판단된다.

• Nuclear Engineering and Technology
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• 제54권10호
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• pp.3957-3961
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• 2022

Deposition behaviors of Sr and Cs in various liquid cathodes, such as Zn, Bi, Cd, and Pb, were examined to evaluate their recovery from LiCl-KCl eutectic salt. Cations in the salt were deposited on the liquid cathode, exhibiting potential of -1.8 to -2.1 V (vs. Ag/AgCl). Zn cathode had successful deposition of Sr and exhibited the highest recovery efficiency, up to 55%. Meanwhile, the other liquid cathodes showed low current efficiencies, below 18%, indicating LiCl-KCl salt decomposition. Sr was recovered from the Zn cathode as irregular rectangular SrZn₁₃ particles. A negligible amount of Cs was deposited on the entire liquid cathode, indicating that Cs was hardly deposited on liquid cathodes. Based on these results, we propose that liquid Zn cathode can be used for cleaning Sr in LiCl-KCl salt.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 1991년도 추계학술대회 논문집
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• pp.17-19
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• 1991

Pastes consisting of $CdZnS_{1-y}Te_{y}$ powder, 20wt/o of $CdCl_2$as a sintering aid and appropriate amount of Propylene Glycol(P.G) have been coated on glass substrates and were sintered at the temperature of $625^{\circ}C$ to find energy band gap, transmittance and electrical properties of the sintered films. The resistivity of sintered film increases with increasing Te content. X-ray diffraction patterns show that $CdZnS_{0.9}Te_{0.1}$ sintered film is in the single film in the two phase region. The transmittance of the sintered film decreases with increasing the Te content.

• Environmental Analysis Health and Toxicology
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• 제19권2호
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• pp.191-200
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• 2004

Zinc (Zn) is an essential element in biological process, however inadequate Zn status in general population have been recognized. To update the knowledge for Zn-cadmium (Cd) interaction, we studied the intestinal uptake and transport, and the expression of metal transporter proteins (divalent metal transporter 1, DMT1 ; metal transporter protein 1, MTP1 ; zinc transporter 1, ZnTl ; metallothionein 1 , MT1) in duodenum after Cd exposure using Zn deficient animal model. Rats were led Zn deficient (ZnD, 0.5-1.0 mgZn/kg) or Zn supplemented (ZnS, 50mg Zn/kg) diet for 4 weeks, and followed single administration of $^{109}$ CdCl$_2$orally. The body Zn flatus and tissue Cd concentration were determined at 24 hrs after Cd administration. Total body burden of Cd and Cd absorption index (AI, %) were estimated based on the tissue Cd analyzed. DMT1, MTP1, ZnTl and MT1 mRNA were analyzed by using RT-PCR method. Feeding of Zn deficient diet for 4 weeks produced a reduced body weight gain and a depletion of body Zn. Tissue Cd concentration, body burden of Cd and Cd absorption index were higher in the ZnD diet fed rats than the ZnS diet red rats. Especially, Cd concentration in the small intestine (duodenum, jejunum and ileum) and the colon of FeD diet fed rats were higher markedly than in the FeS diet group. The expression levels of DMT1, MTP1 and ZnT1 mRNA in FeD diet fed rats were similar to the FeS diet. The level of MT1 mRNA expression was significantly lower in the FeD than the FeS diet fed rats. Taken together, theses results indicate that Zn deficiency in diet induce an increased intestinal absorption and tissue retention of Cd, and down -regulate the MT1 expression in the intestine which might be play a part of role in Cd absorption and transport in mammalian. These findings suggest that deficiency of essential metal could be enhanced the toxicity of toxic, non-esstial metals through the metal-metal interaction.

• Asian-Australasian Journal of Animal Sciences
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• 제2권4호
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• pp.579-582
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• 1989

Previous experiments have shown that aqueous sodium silicate ingested in drinking water may modify the gastrointestinal uptake and(or) tissue retention of certain trace elements, including heavy metals. The present experiment tested, with a mineral balance trial using sheep, the hypothesis that dietary silicic acid could modify uptake, retention and(or) biological effects of dietary Cd. Twenty-four wethers were fed a fibrous diet of ground alfalfa hay and cottonseed hulls to which either 0 or 150 ppm Cd was added as $CdCl_2$ and 0, .5 or 1% silicic acid (as dry matter of the diet). Body weight, feed intake, excretion of urine (volume) and feces (weight), digestibility of dry and organic matter, retention of nitrogen, and packed cell volumes of blood were not affected by either Cd or silicic acid (P<.10). Cadmium decreased (P<.05) Ca retention and increased (P<.01) Mg retention. Silicic acid decreased (P<.05) K retention. Silicic acid failed (P<.01) to modify the retention of added dietary Cd. Body retention of K, Mn and Ni in response to silicic acid varied with Cd levels. If Cd is interfering with mineral retention, silicic acid may be effective in preventing this interference.

• Bulletin of the Korean Chemical Society
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• 제32권7호
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• pp.2207-2211
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• 2011

Colloidal cadmium telluride (CdTe) quantum dots (QDs) and their nanoparticles have been synthesized by one pot sonochemical reactions under multibubble sonoluminescence (MBSL) conditions, which are quite mild and facile compared to other typical high temperature solution-based methods. For a typical reaction, $CdCl_2$ and tellurium powder with hexadecylamine and trioctylphosphine/trioctylphosphineoxide (TOP/TOPO) as a dispersant were sonicated in toluene solvent at 20 KHz and a power of 220W for 5-40 min at 60 $^{\circ}C$. The sizes of CdTe particles, in a very wide size range from 2 nm-30 ${\mu}m$, were controllable by varying the sonicating and thermal heating conditions. The prepared CdTe QDs show different colors from pale yellow to dark brown and corresponding photoluminescence properties due mainly to the quantum confinement effect. The CdTe nanoparticles of about 20 nm in average were found to have band gap of 1.53 eV, which is the most optimally matched band gap to solar spectrum.

• 한국식품과학회지
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• 제26권4호
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• pp.375-381
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• 1994

토양을 대상으로 하여 CGTase를 생산하는 균주를 분리, 선별하여 Bacillus stearothermophilus KY-126을 얻었다. CGTase의 정제는 ammonium sulfate precipitation, ion exchange chromatography, gel filtration의 과정을 통해 분리 정제하여 단일 효소를 얻었으며, 분자량은 약 67,000이었다. 효소 반응의 최적 온도는 $65^{\circ}C$였으며, $55^{\circ}C$에서 30분간 열처리에도 비교적 열에 안정하였다. 최저 활성 pH는 5.5였고 pH5.5에서 10.5까지 비교적 안정하였다. $HgCl_{2}$에 의해 저해를 받았으며, 그 외의 금속 이온에는 저해를 받지 않았다. Soluble starch로부터 CD의 전환율은 43%이었으며, ${\alpha}-:,\;{\beta}-:,\;{\gamma}-$, CD의 생성 비율은 2.9 : 2.1 : 1이었다.

• The Korean Journal of Physiology
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• 제28권2호
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• pp.143-150
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• 1994

The whole-cell mode of the patch clamp technique was used to study $Ca^{2+}-activated\;Cl^-\;current$ $(I_{Cl_{Ca}})$ in gastric antral myocytes. Extracellular application of caffeine evoked $Ca^{2+}-activated\;current$. In order to isolate the chloride current from background current, all known systems were blocked with specific blockers. The current-voltage relationship of caffeine-induced current showed outward rectification and it reversed at around $E_{Cl^-}$. The shift of reversal potential upon the alteration of external and internal chloride concentrations was well fitted with results which were calculated by the Nernst equation. Extracellular addition of N-phenylanthranilic acid and niflumic acid which are known anion channel blockers abolished the caffeine induced current. Intracellular application of a high concentration of EGTA also abolished this current. Application of c-AMP, c-GMP, heparin, or $AIF^-_4$ made no remarkable changes to this current. Sodium replacement with the impermeable cation N-methylglucamine or with $Cd^{2+}$ rarely affected this current. From the above results it is suggested that the caffeine induced current was a $Cl^-$ current and it was activated by intracellular $Ca^{2+}$.

• 약학회지
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• 제52권6호
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• pp.426-433
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• 2008

The interaction of cadmium (II) ion with protocatechuic acid ($H_3PA$) and ethylenediaminetetraacetic acid (EDTA) were investigated in aqueous solution at different pH. The protocatechuic acid and EDTA/cadmium stochiometries for cadmium (II) binding have been determined by UV-vis spectrophotometric method. The complexation of Cd (II) ion with protocatechuic acid was formed in solution. Among the two potential sites of chelation present in the protocatechuic acid structure, the carboxylic function presents higher complexation power toward Cd (II). 1 : 1 Cd (II)-complex had a maximum absorbance and showed the bathochromic shift of the long-wavelength band of the UV-vis spectra in the alkaline pH when interacted with protocatechuic acid in 0.2 M $NH_3$ - 0.2 M ${NH_4}Cl$ (pH 8.0) buffer. These results suggest that Cd $({H_2}PA)^+$ complex has the optimal condition of chelation in buffer solution at 64.22 ${\mu}M$ protocatechuic acid (A=1.01455).