• International Journal of Industrial Entomology and Biomaterials
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• 제3권1호
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• pp.69-73
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• 2001

The effect of topical application 100,300 and 500 $\mu$g/ ml with Mineral Salts of magnesium sulphate and potassium nitrate on economic parameters was ana- lyzed following treatment of last larval stadium. The treated larvae showed significantly decreased larval weight and silk gland weight in all the treated groups along with other decreased Iarval, cocoon and adult parameters. The female cocoon weight was significantly decreased in all the treated groups with decreased female cocoon shell weight and male cocoon weight at 300 and 500$\mu$g/ml respectively. The length and weight of filament was significantly decreased at 300 and 500 $\mu$g/ml respectively and denier at 500 $\mu$g/ ml. The fecundity decreased significantly in 300 and 500 $\mu$g/ml treated groups when compared with the corresponding parameters of the carrier control.

• 한국토양비료학회지
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• 제19권1호
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• pp.9-13
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• 1986

황산칼리와 인산암모니아를 주축으로 한 경기화학공업주식회사인 시제 딸기복비의 비효를 염화칼리, 황산칼리, 질산암모니아에 대비하여 비닐하우스에서 딸기, 보교조생 (Fragaria Grand EHRD)으로 시험한 결과를 요약하였다. 가수분해당을 포함하는 전당의 함량은 높였다. 일반적으로 염화칼리보다 황산칼리가 딸기즙의 딸기의 생육, 화방수.,수량에 미친 시제 딸기복비의 효과는 염화칼리, 황산칼리, 질산암모니아와 통계적인 차이가 없으나 딸기즙의 환원당, 묽은 산당분함량을 높였으며 딸기복비가 딸기즙의 당 함량을 높인것도 황산칼리 때문인 것으로 생각되었다.

• Corrosion Science and Technology
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• 제6권6호
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• pp.304-307
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• 2007

As to the reflection electrode of LCD (liquid crystal displays), silver-copper-gold alloy (hereafter, it is called as ACA (Ag98%, Cu1%, Au1%)) is an effective material of which weathering resistance can be improved more compared with pure silver. However, there is a problem that gold remains on the substrate as residues when ACA is etched in cerium ammonium nitrate solution or phosphoric acid. Gold can not be etched in these etchants as readily as the other two alloying elements. Gold residue has actually been removed physically by brushing etc. This procedure causes damage to the display elements. Another etchant of iodine/potassium iodide generally known as one of the gold etchants can not give precise etch pattern because of remarkable difference in etching rates among silver, copper and gold. The purpose of this research is to obtain a practical etchant for ACA alloy. The results are as follows. The cyanogen complex salt of gold generates when cyanide is used as the etchant, in which gold dissolves considerably. Oxygen reduction is important as the cathodic reaction in the dissolution of gold. A new etchant of sodium cyanide / potassium ferricyanide whose cathodic reduction is stronger than oxygen, can give precise etch patterns in ACA alloy swiftly at room temperature.

• Journal of Biosystems Engineering
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• 제36권2호
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• pp.96-108
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• 2011

Several methods of in-field measurements of Nitrogen and other soil properties using cores extracted by a hydraulic soil sampler were evaluated. A prototype core scanner was built to accommodate Veris Technologies commercial Vis-NIRS equipment. The testing result for pH, P and Mg were close to RPD (Ratio of Prediction to Deviation = Standard deviation/RMSE) of 2, however the scanner could not achieve the goal of RPD of 2 on some other properties, especially on nitrate nitrogen ($NO_3$) and potassium (K). In situ NIRS/EC probe showed similar results to the core scanner; pH, P and Mg were close to RPD of 2, while $NO_3$ and K were RPD of 1.5 and 1.2, respectively. Correlations between estimations using the probe and the core scanner were strong, with $r^2$ > 0.7 for P, Mg, Total N, Total C and CEC. Preliminary results for mid-IR spectroscopy showed an $r^2$ of 0.068 and an RMSE for nitrate (N) of 18 ppm, even after the removal of calcareous samples and possible N outlier. After removal of calcareous samples on a larger sample set, results improved considerably with an $r^2$ of 0.64 and RMSE of 6 ppm. However, this was only possible after carbonate samples were detected and eliminated, which would not be feasible under in-field measurements. Testing of $NO_3$ and K ion-selective electrodes (ISEs) revealed promising results, with acceptable errors measuring soil solutions containing nitrate and potassium levels that are typical of production agriculture fields.

• Journal of Periodontal and Implant Science
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• 제46권1호
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• pp.46-56
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• 2016

Purpose: We evaluated the efficacy of a mouthwash containing potassium nitrate ($KNO_3$) as its main component, along with sodium fluoride (NaF) and cetylpyridinium chloride (CPC). The primary endpoint was the relief of dentin hypersensitivity (DH) against the cold stimuli. The effects on other DH tests and periodontal inflammation were also evaluated. Methods: We used a single-center, double-blind, placebo-controlled, randomized design. A total of 82 patients with DH (40 in the test group, 42 placebo controls) were analyzed using visual analog scales (VASs) for a cold test, a tactile test, a compressive air test, and self-reported pain during daily activities, as well as clinical parameters including plaque index, gingival index, modified sulcular bleeding index (mSBI), gingival recession, and probing depth, which were collected at baseline and after four and six weeks of mouthwash use. Results: VAS scores for cold sensations, tactile sensations, the compressive air test, and self-reported pain significantly decreased from baseline during the six weeks in both groups (P<0.01), and no significant differences between the groups were found. In male patients (10 in the test group and 7 in the control group), both groups showed significant reductions in VAS scores for the cold test over the six weeks, and greater reductions were found in the test group than in the control group between four and six weeks (P=0.01) and between baseline and six weeks (P<0.01). In addition, the mSBI in the test group significantly decreased from baseline during the six weeks (P<0.01), and the changes at four and six weeks from baseline were significantly greater in the test group compared to the control group (P=0.03 and P=0.02, respectively). Conclusions: A mouthwash containing a mixture of $KNO_3$, NaF, and CPC reduced DH and gingival inflammation, however, the efficacy was comparable to the control group.

• 한국추진공학회지
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• 제23권2호
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• pp.104-110
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• 2019

붕소-질산칼륨($BKNO_3$)의 열분해특성을 비등온방식의 TGA(열중량분석법)를 사용하여 평가하였다. 상온과 $600^{\circ}C$의 온도범위에서 2단계에 걸쳐 질량감소가 발생하는 것이 관찰되었다. 열분해특성에 대한 속도론적 파라메타값들은 TGA로부터의 데이터를 AKTS Thermokinetics 소프트웨어를 사용하여 분석되었다. $200^{\circ}C$에서 $360^{\circ}C$의 온도범위에서 발생하는 1차 무게감소는 바인더 (Laminac/Lupersol)의 열분해에 해당하며, Friedman의 등전환법으로 분석되는 경우 활성화에너지는 120에서 270 kJ/mol 사이의 값을 가진 반면에 2차감소 영역($360-550^{\circ}C$)에서의 활성화에너지 값은 150에서 400 kJ/mol의 범위 내에 있었다.

• International Journal of Industrial Entomology and Biomaterials
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• 제7권1호
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• pp.45-49
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• 2003

Foliar treatment with different concentrations of potassium chloride (KCl) to mulberry plants resulted in higher level of total chlorophyll, total sugars, soluble protein, in vivo nitrate reductase activity (NRA), net photosynthetic rate (NPR), pWUE and leaf yield. Optimal concentration was found to be 10.0 mM KCl with limited irrigation provided in the mulberry plantation planted in 90 ${times}$ 90 cm spacing. The deleterious effect of soil moisture stress condition has been found to be overcome by KCl foliar spray twice at 15 days interval. Regression and correlation coefficients were analyzed, and a strong positive correlation was found between chlorophyll and total sugars, soluble protein and in vivo nitrate reductase activity, leaf dry weight and net photosynthetic rate and pWUE and net photosynthetic rate.

• Advances in environmental research
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• 제1권2호
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• pp.143-151
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• 2012

Nitrate removal from aqueous solution was investigated using $ZnCl_2$ and phosphoric acid activated carbon developed from pomegranate peel with particle size 0.4 mm. Potassium nitrate solution was used in batch adsorption experiments for nitrate removal from water. The effects of activated carbon dosage, time of contact, and pH were studied. The equilibrium time was fond to be 45 min. Two theoretical adsorption isotherms namely Langmuir and Freundlich were used to describe the experimental results. The Langmuir fit the isotherm with the theoretical adsorption capacity ($q_t$) was fond 78.125 mg g-1. Adsorption kinetics data were modeled using the pseudo-first, pseudo-second order, and intraparticle diffusion models. The results indicate that the second-order model best describes adsorption kinetic data. Results show activated carbon produced from pomegranate is effective for removal of nitrate from aqueous solution.

• 한국콘텐츠학회논문지
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• 제12권1호
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• pp.353-360
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• 2012

본 연구에서는 현재 자가 미백용으로 많이 사용하고 있는 15% carbamide peroxide(CP)에 potassium nitrate와 fluoride(PF)가 함유된 제품과 미 함유된 제품을 사용하여 색과 표면미세경도를 측정하였다. 건전한 소구치 30개를 이용하여 30개의 시편을 제작하였고, 각 각 10개씩 3군으로 분류하였다. 1군은 대조군 (Distilled water), 2군은 15% CP, 3군은 15% CP(3% potassium nitrate and 0.11% fluoride 함유)이다. 치아미백은 14일 동안 하루에 6시간 미백하고 이후 시간은 증류수에 보관하였다. 색 측정은 미백 전과 14일에 측정하였고, 표면미세경도는 미백 전, 7일, 14일에 측정하여 다음과 같은 결과를 얻었다. 색변화를 본 결과 미백하지 않는 대조군 1군과 미백제가 함유된 2군과 3군에는 통계적으로 유의한 차이가 보였고(p<0.05), 2군과 3군 사이에는 통계적으로 유의한 차이를 나타내지 않았다(p>0.05). 표면미세경도 변화를 비교해보면 시간이 경과함에 따라 대조군을 제외하고 2군과 3군에서는 미백 전 경도 값에 비해서 미백 후 유의하게 경도의 감소를 보였고(p<0.05), 특히 미백 7일째 경도 값의 차이가 미백 후 14일보다 컸다. 미세경도 감소율을 보면 대조군인 1군은 7일과 14일에 각 각 1.7과 0.8로 차이가 거의 없으나 2군은 21.9,와 3.5이고, 3군은 16.7과 1.4로 미백 7일째에서 유의하게 감소했고(p<0.05), PF가 미 함유된 2군의 7일째 미세경도 감소율이 가장 컸다. 이상의 결과를 종합해 보면, PF는 치아미백에 부정적 영향을 주지 않으며, 미세경도 변화에서는 PF가 함유된 미백제에서 경도 감소율이 적었다. 따라서 PF가 함유된 치아미백제는 미백효과와 함께 치아법랑질의 경도 감소를 줄일 수 있다.

• Mycobiology
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• 제36권1호
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• pp.34-39
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• 2008

Schizophyllum commune is an edible and medicinal mushroom widely distributed in the world. The optimal growth conditions for the mycelia of 10 strains of the fungus were investigated. The temperature suitable for the mycelial growth and density was obtained at $30{\sim}35^{\circ}C$. Among the tested conditions, the minimum mycelial growth was found at $15^{\circ}C$. In case of pH, the most favorable growth was found at pH 5. The results indicated that this mushroom well adapted to high temperature and low pH for its mycelial growth. Considering growth phenotype of mycelia, Hamada, Hennerberg, PDA and YM were the most suitable and Lilly, Glucose triptone, Glucose peptone and Hoppkins were the most unfavorable among tested media for the mycelial growth of S. commune. Out of tested carbon sources, dextrin and fructose were the most suitable and lactose, mannose and sorbitol were the unsuitable for the fungus. Compact mycelial density was obtained from most of the carbon sources. Among used nitrogen sources, calcium nitrate, potassium nitrate and alanine were the most appropriate and the most incompatible were ammonium phosphate, histidine, urea and arginine for mycelial growth of S. commune on the culture media. Calcium nitrate, histidine and potassium nitrate showed moderately thin or thin, and rest of nitrogen sources showed compact or moderately compact mycelial density.