• Proceedings of the Korea Institute of Fire Science and Engineering Conference
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• 2013.04a
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• pp.158-159
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• 2013

방염제인 인산암모늄에 질산칼륨을 첨가하여 질산칼륨이 인산암모늄의 방염성능에 미치는 영향을 DSC와 실체현미경으로 분석하였다. 활성화에너지는 키싱거방법을 도입하여 분석하였다. 방염성능 실험으로서 셀룰로스를 연료로 사용하였다. 질산칼륨이 일정량 첨가된 방염제를 사용하는 경우 인산암모늄의 활성화에너지를 높이고 탄화면적을 감소시켜 연소확대를 억제하였다. 방염제인 질산칼륨이 첨가된 인산염을 방염제로 사용하는 경우 질산칼륨의 강한 산화력으로 화염발생 온도를 낮추고 탄화형성을 억제하여 화재진행 속도를 낮추는 것으로 나타났다. 적정량 이하의 질산칼륨이 포함된 방염제의 처리는 연소속도를 높이고 탄화물형성을 감소시킬 수 있음을 제시하였다.

• Journal of the Korean Society of Tobacco Science
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• v.7 no.2
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• pp.141-149
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• 1985

뿌리에서 흡수된 질소는 대부분이 질산태이온으로 잎의 엽맥까지 도달하나 엽육에서 급격히 환원되어 유기태질소로 동화한다. 잎의 주맥을 통과하여 세맥까지 질산태질소로 이동되며 전질소의 1/2이상의 양까지 다다르나 엽육에서는 전질소함량이 엽맥의 5배까지 증가되어도 질산태질소는 $10^{-2}$ 정도로 급격히 환원되었다. 칼륨은 엽맥까지 질소와 동반 이동하나 엽육에서의 질산태질소환원에 의하여 이동이 차단되는 현상을 보였다. 엽육에 축적된 칼륨은 능금산의 축전을 촉진하였고 질산환원효소의 활성이 왕성하게 일어나는 하위엽에 높은 농도로 축적되었다.

• The Journal of Natural Sciences
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• v.8 no.2
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• pp.129-136
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• 1996

The direct conversion of solid potassium chloride to solid potassium nitrate by the reaction of the chloride with gaseous nitrogen dioxide is suggested for the preparation of potassium nitrate. Thermodynamic calculations indicate that the free energy change is favorable at ordinary temperatures and that the reaction is exothermic. Experiments are described in which it was found that the reaction takes place at ordinary temperatures in the presence of a small amount of water with good yield. Nitrosyl chloride is produced simultaneously.

• Explosives and Blasting
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• v.33 no.2
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• pp.1-14
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• 2015

This study was performed to investigate the manufacturing process of the Yeomcho(potassium nitrate), a necessary raw material for making gunpowder using soils and ashes by our ancestor. 10 types of soils including underfloor soil and 6 kinds of ashes including mugwort ash were collected, referencing the historical record. The ionic components extracted from the soils and ashes were analyzed by ICP(inductively coupled plasma atomic emission spectrometer) and IC(ion chromatograph). Nitrate ions and potassium ions were dominantly contained in soils and ashes, respectively. In particular, nitrate ions were found in the highest lebels in underfloor soil which often has much exposure to human living environments and accumulated fine organic matter. Potassium ions contained in ash was affected significantly by the type of plant and the growth environments and the measured levels were the highest in mugwort ashes. Yeomcho of 68% purity was obtained from the soil and ash mixture of 1:1 and thid purity was improved by about 14% by fractional crystallization method.

• Korean Journal of Soil Science and Fertilizer
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• v.23 no.4
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• pp.293-296
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• 1990

The effect of wallastonite, potassium chloride and potassium sulphate on the ammonification and nitrification of urea was studied in a non-planted green house experiment, filling with 500g soil in plastic pot and incubating for 17 days. Potassium sulphate gave superior effect on the neutralizing soil acidity of wallastonite than potassium chloride and raised soil pH which promoted ammonification and subsequent nitrification of urea. Less than 20% $NO_3-N$ against the sum of $NH_4-N$ and $NO_3-N$ was accumulated in soils incubated bellow pH 6.0. It seemed that pH 5.2 to 6.0 was the critical range for the nitrification of ammonium, or raising the concentration of ammonia in soils to the toxic level to the nitrification. It appeared that the nitrification could be occuring in low moisture, air dried, conditions of soil.

• Korean Journal of Soil Science and Fertilizer
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• v.18 no.1
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• pp.89-93
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• 1985

In order to develop the nutrient material for growing plants, tobacco leaf debris (T.L.D) that is a residual product of cigarette processing was carbonated at about 50% of its weight and neutralized its alkalinity by nitric and phosphoric acid. This material ($T.L.D+3N-HNO_3+1N-H_3PO_4$ (10:1:1), as a consequence, contained 4.1% of nitrogen, 2.1% of phosphte, and 6.6% of potassium in value of about pH 7. It was very effective on seedling growth to apply 1 Kg of nutrient material per 110 1 of bed soil as basic dressing because of containing not only quick-acting nitrate but also slow-releasing organo-nitrogen and sufficient potassium.

• Proceedings of the Korean Institute of Industrial Safety Conference
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• 2002.11a
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• pp.79-85
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• 2002

도금이란 금속이나 비금속의 표면을 얇은 금속 막으로 밀착 피복 시켜 마무리하는 공정을 말한다. 이러한 도금은 제품에 내식성과 장식성, 기계적 강도 등을 주기 위한 목적에서 행해진다. 그러나 도금작업에서는 염산, 황산, 질산 등의 산성물질(Acid)과 수산화나트륨, 수산화칼륨 등의 알칼리성 물질 및 시안화칼륨, 시안화나트륨 등의 시안화크롬화합물 이외에도 다수의 유해한 화학물질을 취급하고 있다.(중략)

• Journal of the Korean Society of Propulsion Engineers
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• v.3 no.4
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• pp.23-30
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• 1999

The thermal decomposition of phase stabilized ammonium nitrate(PSAN) was studied by means of thermogravimetric analysis(TGA). In this study, potassium nitrate and zinc oxide were used as the phase stabilizers in the range of contents from 0 wt.% to 8 wt.%. The kinetics and mechanism for the decomposition were evaluated using integral methods. It was found that the thermal kinetic parameters such as activation energy(I) and frequency factor(A) increase with the increase of the stabilizer contents, and the mechanism of decomposition also changes.

• Korean Journal of Environmental Agriculture
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• v.39 no.2
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• pp.95-105
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• 2020

BACKGROUND: In this study, in order to verify the effects of supplemented organic amendment fertilizers recommended by the soil testing on cabbages, we used various amounts of organic amendment fertilizers. The amount of organic amendment fertilizers was decided by calculating each ratio of inorganic nitrogen, phosphorus, and potassium based on the recommended fertilizer composition. METHODS AND RESULTS: The cabbages subjected to treatments 1 and 2 showed similar or greater leaf colors (SPAD values), head heights, head widths, head weight, soil organic matter content, nitrate-nitrogen level, and conductivity after harvest, when compared with cabbages treated with chemical fertilizers. The phosphorus and potassium fixation in the soil were higher in the plot where cabbages were treated with chemical fertilizers, and the nutrient use efficiency was greater in the plots with organic amendments and mineral addition. CONCLUSION: The treatments 1 and 2 that were supplemented with 180-200% of nitrogen, 100-130% of phosphorus, and 185-250% of potassium in comparison to chemical fertilizers, applied by the inorganic ratios of nitrogen, phosphorus, and potassium can be used as organic amendment fertilizers for cabbages.

• Journal of the Korean Society of Propulsion Engineers
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• v.23 no.2
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• pp.104-110
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• 2019

The thermal decomposition characteristics of boron-potassium nitrate ($BKNO_3$) were investigated by non-isothermal thermal gravimetric analysis (TGA). Two steps of mass loss were observed in the temperature range between room temperature and $600^{\circ}C$. Kinetic parameters of the thermal decompositions were evaluated from the measured TGA curves using the AKTS Thermokinetics Software. For the first step of mass loss ($220-360^{\circ}C$) corresponding to the thermal decomposition process of the binder (Laminac/Lupersol), the activation energy is in the range of approximately 120-270 kJ/mol when evaluated by Friedman's iso-conversional method, while the value of activation energy varies in the range of approximately 150-400 kJ/mol during the second step process ($360-550^{\circ}C$).