• Bulletin of the Korean Chemical Society
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• 제32권12호
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• pp.4191-4194
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• 2011

Sodium periodate ($NaIO_4$) and potassium iodide (KI) in aqueous ammonia has been used for the one-pot synthesis of nitriles from the corresponding aldehydes and alcohols in moderate to good yield. This transformation, proceeds via an in situ oxidation- imination-aldimine oxidation sequence.

• 대한화학회지
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• 제18권5호
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• pp.373-380
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• 1974

저자들에 의해서 이미 보고되어 있는 요오드화염으로부터 요오드산염$(I^-{\to}{IO_3}^-)$ 및 요오드산염으로 부터 과요오드산염$({IO_3}^-{\to}{IO_4}^-)$까지의 전해결과를 참작하여 무격막 전해조와 이산화납양극을 사용하여 요오드화염으로부터 과요오드산염$(I^-{\to}{IO_4}^-)$을 직접 전해제조하기 위한 최적 전해조건에 관하여 검토하였다. 0.5g/l의 환원방지제인 중크롬산칼륨을 함유함 1몰의 요오드화칼륨 수용액을 15A/$dm^2$의 양극전류밀도와 $60^{\circ}C$의 전해온도에서 전해한 결과, 요오드화칼륨으로 부터 과요오드산칼륨까지의 변화율 98%에서 전류효율이 84%이었다. 또한 각종 전해액중에서 이산화납 양극에 의한 분극곡선으로 부터 전극반응의 내용도 설명하였다.

• 한국추진공학회지
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• 제24권1호
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• pp.58-63
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• 2020

착화기에 많이 사용되고 있는 금속복합화약인 THPP(Titanium Hydride Potassium Perchlorate)는 금속연료로 타이타늄 수소화물(TiH₂), 산화제로 과염소산칼륨(KClO₄)을 주요 구성 성분으로 하는 파이로 테크닉 조성물이다. 그러나 산화제로 사용되는 과염소산칼륨은 갑상선 기능부전이나 종양 등을 일으킬 수 있는 유해물질로 염소 성분인 과염소산(ClO₄^-)이 포함되어 있다. 본 연구에서는 과염소산칼륨의 대체물질로서 과옥소산칼륨(KIO₄)을 적용하여 친환경 화약을 개발하였으며, 착화기에 적용하여 THPP 대체가능성을 확인하였다.

• 대한화학회지
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• 제15권6호
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• pp.324-329
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• 1971

In order to evaluate the mechanism of electrolytic oxidation of iodate and to determine the optimum conditions for the electrolysis, studies were made using the cells without diaphragm and the lead peroxide anode. Results are summarized as followings: 1) Current density vs. anode potential curve by lead peroxide electrode had the different limiting current densities from platinum electrode and was more positive than platinum electrode. 2) Additions of potassium bichromate in the electrolyte contribute to maintain high current efficiency. 3) In the acid and alkaline regions, the current efficiencies decreased by reduction of iodate and discharge of hydroxyl ion, so maximum current efficiency was shown at pH 7. 4) Higher current density lowered the current efficiency in the region of 60-80% conversion of iodate. 5) Influence of the conversion on current efficiency in the region of 60-80% conversion of iodate.

• 대한수의학회지
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• 제5권1호
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• pp.43-57
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• 1965

It has been-reported that rabbit serum exhibit an inhibitory action on avian infectious bronchitis virus in embryonating chicken embryo. In this thesis, the biological, serological, physical and chemical properties of normal rabbit serum on the effect of the virus propagation were studied. Throughout the studies, the following experimental results 'were obtained and summarized here. 1. An inhibitory action of rabbit serum on avian infectious bronchitis vrius is due to the normal serum constituents. 2. The nature of the neutralization between normal rabbit serum and the virus is similar to that of the specific antiserum and the virus. 3. Rabbit serum, heat inactivated at $56^{\circ}C$, for 30 minutes, showed its average $log_{10}El,D_{50}Nl$ of 3.7. 4. The inhibitory compound present in the normal rabbit serum is inactivated by means of 5 per cent trypsin, 0.01 M potassium periodate, and absorbed to zymosan. 5. The inhibitory compound was not affected by 0.05 M trichloroacetic acid and 0.005M $KH_2PO_4$. 6. The higher the temperature of heat inactivation of rabbit serum caused the lesser the neutralizing effect on the virus. Heating the serum at $66^{\circ}C$, for 30 minutes brought about a complete loss of the neutralizing index of the serum. 7. No ions, as a cofactor, was incorporated to the inhibitory action of rabbit serum on the virus. 8. The inhibitory compound amays be found in a fraction of serum globulin.

• 응용화학
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• 제15권1호
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• pp.21-24
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• 2011

A sensitive silver nanoparticles (Ag NPs) enhanced chemiluminescence (CL) method is reported for the determination of mandelic acid (MA). This method is based on the luminol-KIO₄ system catalyzed by Ag NPs to produce CL spectra. Prepared Ag NPs were characterized by UV-visible spectra and TEM image. Under optimal condition, CL spectra of the system were responded linearly with the concentration of MA in the range of 2.5×10^-9 to 2.0×10^-8 mol L^-1 (r=0.9989) with a detection limit of 1.2×10^-10 mol L^-1. The relative standard deviation of 1.0×10^-7 mol L^-1 MA was found 1.45 (n=9).