• Archives of Pharmacal Research
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• v.8 no.2
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• pp.49-57
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• 1985

The effect of ginseng components on the potassium depleted cardiomyopathic rat heart was investigated. In the perfused heart experiment using Langendorff apparatus, the deterioration rate of contriactile force of potassium depleted rat heart (low potassium diet group) was faster than that of normal rat heart and ginseng components showed the ability to slow the deterioration rate of potassium depleted hearts. Both sialic acid contents in carcolemmal ghost and sialyltransferase activity of 40,000 * g subcellular fraction prepared from cardiac ventricular tissue of low potassium diet group were significantly decreased compared to those of normal group. The decrease of the sialic acid content and sialyltransferase activity in sarcolemma of low potassium diet group was inhibited when ginseng was concomitantly administered. Calcium uptake of sarcoplasmic reticulum prepared from low potassium diet group was significantly greaterthan that of normal group. Ginseng extract or total saponin showed the tendency to inhibit the increase of cacium uptake.

• Korean Journal of Soil Science and Fertilizer
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• v.44 no.2
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• pp.303-305
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• 2011

A study of different levels of Nutrition Elements and the chemical properties of the soil was conducted to determine the yield performance of potato. Application of sulfur, potassium, and Magnesium significantly affected final height, dry matter content, and crispiness of potato. The final pH, organo-nitrogen, phosphorus, potassium, and magnesium content in the soil were significantly affected by S-K-Mg application.

• Korean Journal of Fisheries and Aquatic Sciences
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• v.9 no.3
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• pp.163-168
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• 1976

Three species of Rhodophyceae namely Chondrus ocellatus, Grateloupia filicina and Gigartina tenella were collected from the coast of Haeundae, Busan, on June 33, 1975. And analysed with respect to the content of carrageenan and such chemical characteristics as the content of sulphate and 3, 6-anhydrogalactose, the solubility in potassium chloride solution. In addition, the same chemical properties were tested on the fractions separated by the different concentration of potassium chloride. Carrageenan content in Chondrus ocellatus was relatively higher than two other samples. All the samples showed more than thirty five percent. The Gigartina-carrageenan showed the highest 3,6-anhydrogalactose content among three samples of carrageenan obtained from different species, and the lowest marked from the Grateloupia-carrageenan. In comparison of the solubility of carrageenan in potassium chloride solution, the precipitation yields at 0.125M potassium chloride were marked in order of Chondrus-carrageenan, Grateloupia-carrageenan, and Gigartina-carrageenan, and the yields at 0.125 M to 2.0 M potassium chloride were in Gigartina-carrageenan, Grateloupia-carrageenan, and Chondrus-carrageenan, and the yields from the soluble fraction at 2.0 M potassium chloride were in order of Grateloupia-carrageenan, Gigartina-carrageenan, and Chondrus-carrageenan. It is noteworthy from the result of characteristics of carrageenans that, 3,6-andydrogalactose content was closely related to the solubility of carrageenans in potassium chloride solution and to the sulphate content which might affect reversibly.

• Korean Journal of Soil Science and Fertilizer
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• v.7 no.1
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• pp.55-64
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• 1974

Effect of tow or three week potassium depression on nutrient contents in two rice varieties, Jinheung (a leading local) and IR 667-Suwon 214 (high yielding tropical line), was investigated at various growth stages in water culture system for the nutritional elucidation of potassium top dressing. According to potassium content, potassium ratio beween leaf blade and leaf sheath plus culm, relative potassium content ($-k/+k{\times}100$) and balance between potassium and other nutrients (K/N or K/Ca+Mg) it could be concluded as follows: 1) Rice plants have three sensitive growth stages to potassium stress in the orther of ear formation stage (20 to 30 days before heading) early tillering (15 to 25 days after transplanting) and at heading. 2) IR 667 is more sensitive to potassium stress than Jinheung, especially in early stage due to lower uptake of potassium. 3) Leaf sheath of IR 667 appears to have a role as potassium reservoir to greater extent than that of Jinheung.

• Korean Journal of Soil Science and Fertilizer
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• v.42 no.4
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• pp.301-306
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• 2009

This study was conducted to determine the physiological differences betweenhealthy and wilted plants with respect to nitrate assimilation and ascorbic acid content. Wilting was artificially induced in spinach plants by treating the seeds with nutrient solution containing high nitrogen and low potassium. The plants were cultured in different plots 4 types of media: 1N-1P-1K (control), 6N-1P-0K (0K), 6N-1P-0.5K (0.5K), and 6N-1P-2K (2K). The rate of wilting among the plants was as follows: control, 0%; 2K, 10%; 0.5K, 40%; and 0K, 70%. This shows that under high nitrogen conditions, the lower the amount of potassium provided, higher was the rate of wilting. There were no differences in plant growth among the plants treated with different levels of potassium under high nitrogen conditions.The nitrate content in both the leaves and the roots was higher in plants grown under high nitrogen media than those in the control. Furthermore, the nitrate level decreased with increasing potassium concentration. The ascorbic acid content of spinach under high nitrogen conditions was lower than those of the control.

• Bulletin of the Korean Chemical Society
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• v.35 no.9
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• pp.2711-2716
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• 2014

The high content of potassium in molasses limits its usage as a raw material for stock feed. Moreover, its high viscosity makes it difficult to develop an efficient removal process. In this study, ion exchange and solvent extraction experiments have been performed to investigate the removal of potassium from a mixture of molasses with water. Cationic exchange resins (AG50W-X8 and Diphonix) showed a high loading percentage of potassium but the occurrence of breakthrough in few bed volumes was a drawback to the industrial application. Among the cationic extractants (D2EHPA, PC 88A, Cyanex 272) tested in this study, saponified PC 88A was found to be the best extractant for the removal of potassium. Batch simulation studies on a three stage counter current extraction confirmed that 85% of potassium was removed from 50 wt % molasses solution in water by using saponifed PC 88A.

• Journal of the Korean Ceramic Society
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• v.22 no.2
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• pp.25-32
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• 1985

Effect of alkali $SO_3$ and $C_2S$ content and cooling condition of clinker on the formation of unstable alkali and cooling condition of clinker on the formation of unstable alkali was investigated. As a result alkali and $SO_3$ content of clinker were the main factors of unstable alkali formation and equation (7) in which the two factors were the variables showed a good agreement with the observed results. Water soluble alkali content of sulphate was decreased with increase of $C_2S$ content of clinker resulted by the increase of solid solution rate of alkali to clinker minerals. But change of unsatble alkali content accordint to the increase of $C_2S$ content was slight. A increasing tendency of ignition loss of clinker with increase of unstable alkali content was found.

• Journal of Bio-Environment Control
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• v.27 no.1
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• pp.40-45
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• 2018

Potassium in vegetables is known to have an adverse impact on a patient with chronic kidney desease. However, since vegetables also contain many other nutrient, consumption of vegetables by these patients is inevitable. The objective of this study was conducted to develop a fresh lettuce which contains low level of potassium for nephropathy in a closed-type plant factory system. Lettuce of "Charles" was used for experiment. The plants were cultivated in hydroponic system with a 16-h photoperiod at $15-21^{\circ}C$, 65% RH, $200{\mu}mol{\cdot}m^{-2}{\cdot}s^{-1}$(LED W:R, 9:1) and $600-650mg{\cdot}L^{-1}$ $CO_2$ during 28 days. Nutrient solution which contains 1%, 5% and 10% potassium compared to conventional composition were supplied at 1 week and 2 weeks before harvest. The content of potassium and macro elements in leafy vegetables were analyzed by ICP emission spectroscopy after harvest. The potassium content in leaf of the 2 weeks before harvest treatment was significantly lower at than control. There were no significant differences between control and treatments in fresh weight and number of leaves. But there were differences among treatments. Considering the vegetable amounts consumed by nephropathy patients, the supply of nutrient which contain 1% and 5% potassium at 2 weeks before harvest was suitable for low potassium lettuce production. This study indicated that low potassium lettuce could be produced by developed nutrient composition and supply method.

• Journal of Bio-Environment Control
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• v.12 no.1
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• pp.26-29
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• 2003

Experiments were conducted to estimate optimal potassium strength in the nutrient solution for ‘Nokgwang’and‘Kwari’green pepper seedlings cultured in small plug-cell trays. Plant height, stem diameter, and leaf area increased with increasing K concentration, with greater effect on ‘Kwari’ than ‘Nokgwang’. Total dry weight increased by increasing potassium strength.‘Kwari’had heavier dry weight than ‘Nokgwang’Chlorophyll content differed by cultivars and potassium strength. The highest chlorophyll content was obtained at 2.0 strength potassium in‘Nokgwang’, but not in‘Kwari’Net photosynthesis was greater in plants fertilized with 1.5 strength potassium for‘Nokgwang’and 2.0 strength potassium for ‘Kwari’than the other treatments.

• Journal of environmental and Sanitary engineering
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• v.7 no.1
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• pp.57-66
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• 1992

To investigate on the element content of twelve edible mushrooms and Aloe arborescent, i.e., Lentinus edodes, Ganoderma lucidum (culturing in wood and soil), Tricholoma matsutake, Agaricus auricula-Jude (produced in Korea and China), sarcodon asparatus, Pleurotus ostreatus, Coriolus bisporus, Cyrophora esculenta, Auricularia auricula-Jude (produced in Korea and China), Sarcodon asparatus, Pleurotus ostreatus, Coriolus rersicolor, Smilax rotundifolia and Aloe arborescenstyl were analyzed by Atomic absorption spectrometer. The obtained results were summarized as follows : 1. Potassium, sodium, magnesium and iron content for the most part samples were in large quantities, especi phosphorus content of those was highest ammount for the all samples. 2. Sodium content f·as much ammount in the Lentinus edodes(39 mg, and Ganoderma lucidum(20 mg) , Culturing in wood and soil, while potassium was very high ammount in the Aloe arborescens and other samples. Mush ammount of magnesium as compared with others was Lentinus edodes(144 mg) , Ganoderma lucidum(128 mg), Aloe arborescens(50 mg) and Pleurotus ostreatus (60 mg) . 3, Phosphorus content of Lentinus edodes, Gyrophora esculenta, Auricularia polytricha and Agaricus bisporus was much ammount while iron content of all samples equality higher ammount. Sodium content of Aloe arborescens was not analyzed out for almost all, its potassium(82 mg), magnesium(50 mg) and iron(18 mg) content comparatively higher quentity than others nllnerals and phosphorus volume (4.9 mg) as compared with others, was conspicuously lower detect. 4. Cadimium and lead content of harmful metal element were detected on trace quantity for the most part samples. 5. Organic acids of samples i.e., Lentinus edodes, Agaricus bisporus, Pleuritus ostreatus and Ganoderma lucidum were Citrate, Malate, Fumalate, Succinate, Oxalate, Acetate, Lactate, and Tartarate and Citrate, Malate and Fumarate contents were higher amount remarkbly than other organic acids. Tartarate content was trace amount.