• Journal of the Korean Chemical Society
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• v.31 no.2
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• pp.178-183
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• 1987

The kinetics of the reaction of $[Mo_3O_4(H_2O)_9]^{4+}$ with $VO_2^+$have been studied at $25^{\circ}C$ by spectrophotometric method. With$VO_2^+$ in excess, the $[Mo_3O_4(H_2O)_9]^{4+}$ reaction can be expressed as $Mo^{IV}_3+6V^V{\rightleftarrows}3Mo^{IV}+6V^IV}$. Observed rate constants for the reaction are dependent on [$H^+$] and [$VO_2^+$]. Mechanism for the redox of $[Mo_3O_4(H_2O)_9]^{4+}$and $VO_2^+$ is proposed and discussed.

• The Korean Journal of Nuclear Medicine
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• v.32 no.5
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• pp.436-442
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• 1998

Radioactive iodine treatment has been widely used for nearly 50 years in the treatment of thyroid cancer to ablate residual thyroid tissue after thyroidectomy and to treat metastatic disease. Leukemia is a rare complication associated with the radioactive iodine therapy. The occurrence of leukemia is known to be related to the cumulative dosage of I-131 more than 37 GBq (1 Ci) and also associated with the intervals of less than 12 months between the repeated doses. We report a case of a 52 year-old female patient with papillary cancer of thyroid who developed acute myelogenous leukemia after the total 20.4 GBq (550 mCi) of I-131 therapy over 3.2 years and palliative radiation therapy (3000 cGy) due to multiple bone metastasis of papillary cancer.

• Journal of the Korean Chemical Society
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• v.34 no.2
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• pp.171-178
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• 1990

The rates of the reaction Of $[MoO_2(S_2CNC_4H_8)_2]$ with triphenylphosphine in 1,2-dichloroethane have been by the spectrophotometric method. The increase in absorbance at 514 nm has been interpreted as a result of production of $[Mo_2O_3(S_2CNC_4H_8)_4]$ and the decrease in absorbance then corresponds to the reduction of $[Mo_2O_3(S_2CNC_4H_8)_4]$. The data suggest mechanisms involving the formation of $\mu$-oxo dimer in the first stage and molybdenum(IV) in the second stage.

• The Korean Journal of Nuclear Medicine
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• v.38 no.3
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• pp.272-273
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• 2004

We experienced a case with meningioma showing false positive I-131 uptake. A 55-years old female patient underwent high dose (150 mCi) radioactive iodine therapy to ablate remnant tissue after total thyroidectomy for papillary thyroid cancer. in addition to intense tracer uptake in thyroid bed, there was mild but focal abnormal uptake in left frontal lobe of the brain on post-therapy I-131 whole body scan. Subsequent brain MR imaging showed single mass lesion in left frontal lobe and the mass was resected under the impression of brain metastasis of thyroid carcinoma. Pathologic report confirmed meningioma from the surgical specimen.

• Applied Chemistry for Engineering
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• v.29 no.4
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• pp.363-368
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• 2018

Polyoxometalates (POMs) have outstanding properties and a great deal of potential for electrochemical applications. As POMs are highly soluble, the implementation of POMs in various functional materials is required to fully use their potential in electrochemical devices. Here, we will review the recently developed immobilization methods to incorporate POMs into conductive nanomaterials, such as nanocarbons and conducting polymers. Various immobilization strategies involve POMs entrapped in conducting polymer matrix and integration of POMs into nanocarbons using a Langmuir-Blodgett technique, a layer-by-layer self-assembly, and an electrochemical in-situ polymerization. In addition, we will review a variety of electrochemical applications including electrocatalysts for water oxidation, lithium-ion batteries, supercapacitors, and electrochemical biosensors.

• Resources Recycling
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• v.27 no.3
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• pp.3-7
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• 2018

Development of extractive metallurgical processes for metal sulfides has become of importance owing to the depletion of oxide ores with rich metal contents. Most of the leaching reactions of metal sulfides is electrochemical reaction and can be classified as $H_2S$, S, and ${SO_4}^{2-}$ evolution type. The acidity of leaching solution and the presence and concentration of an oxidizing agent affect the formation of reaction intermediates containing sulfur. Frost diagram of sulfuroxoanion indicates that the oxoanions with higher oxidation number are more thermodynamically stable in the presence of oxidizing agents.

• Journal of the Korean Chemical Society
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• v.33 no.5
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• pp.545-550
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• 1989

When (3R,4R)-1-(1-benzyloxycarbonyl-2-methyl-1-propenyl)-4-mercapto-3-phenylacetamidoazetidin-2-one(8) was reacted with carbon disulfide and alkyl halides in the presence of triethylamine, the ${\beta}$-lactam ring was cleaved to give (Z)-and (E)-1-alkylthio-5-benzyloxycarbonyl-6-methyl-2-phenylacetamido-4-aza-1,5-heptadien-3-one (13-16) or 2-benzyl-4-(3-benzyloxycarbonyl-4-methyl-1-oxo-2-aza-3-pentenyl)thiazole(17).

• Journal of the Korean Chemical Society
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• v.33 no.5
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• pp.477-477
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• 1989

The rates of the reaction of $[MoO_2(S_2CNEt_2)_2]$ with triphenylphosphine in 1,2-dichloroethane have been determined by the spectrophotometric method. The increase in the initial absorbance has been interpreted as a result of the production of $[Mo_2O_3(S_2CNEt_2)_4]$ and the decrease in absorbance then corresponds to the reduction of $[M_2O_3(S_2CNEt_2)_4]$. The data suggest mechanisms involving the enzymatic reaction in the first stage and the decay of intermediate, ${\mu}$-oxo molybdenum (V) dimer in the second stage.

• Journal of the Korean Chemical Society
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• v.30 no.6
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• pp.532-537
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• 1986

The kinetics of the reaction of $[Mo_2O_4(H_2O)_6]^{2+}$ with $VO_2^+$ have been studied at $25^{\circ}C$ by spectrophotometric method. Stoichiometry of the oxidation of$ [Mo_2O_4(H_2O)_6]^{2+}$ is followed as $Mo_2^V + 2V^V {\rightleftharpoons} 2Mo^{VI} + 2V^{IV}$. Observed rate constants are dependent on $ [H^+]\;and\;[VO_2^+]$. Mechanism for the redox of $[Mo_2O_4(H_2O)_6]^{2+}\;and\;VO_2^+$ is proposed and discussed.

• Tuberculosis and Respiratory Diseases
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• v.42 no.4
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• pp.594-599
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• 1995

Although papillary carcinoma of the thyroid generally follows an indolent course characterized by slow growth and the absence of distant metastases, several available reports suggest that metastasis to bone and/or lung parenchyma may occur infrequently. But pleural metastases are known to be very rare, so there have been only two case reports about the pleural metastases of papillary thyroid carcinoma in the literatures. Even the case of occult papillary thyroid carcinoma presenting as a metastatic pleural effusion has been never been reported. Recently we experienced a case with the chief complaint of dyspnea due to massive pleural effusion, the cytologic examination of which revealed the papillary carcinoma with psamomma bodies. The examination of the thyroid revealed no definite primary tumor. The total thyroidectomy was done with the plan of post-operative radioactive iodine treatment and the pathologic result confirmed the occult papillary microcarcinoma as expected. With the present case report, the extension of the clinical spectrum. of metastatic papillary carcinoma of the thyroid is expected.