• Journal of the Korea Institute of Building Construction
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• v.8 no.5
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• pp.119-125
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• 2008

In this paper, the estimation of super retarding concrete incorporating mineral admixtures at the same time including fly ash(FA), blast furnace slag(BS) are studied based on maturity method. The setting time was retarded, as super retarding agent contents increase and curing temperature decreases. In addition, apparent activation energy by Arrhenius function was ranged from $24\sim35$ KJ/mol with slightly difference along with mixture proportion. This value is smaller than existing value $30\sim50$ KJ/mol. Based on strength development estimation. it exhibited comparable relativity between prediction value and measurement value. Therefore, this study provided effective strength development prediction value with super retarding agent contents and mineral admixture combination. Strength development prediction equation provided herein is possibly valid for estimating accurate strength development of the super retarding concrete at the job site.

• Korean journal of food and cookery science
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• v.15 no.4
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• pp.382-387
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• 1999

This study was conducted to investigate the changes of mineral contents in radish leaves, soybean sprout and chwi namul by cooking method(boiling, steaming, sauting) and cooking time(1, 3, 5 min.). The residual rate of minerals(such as Calcium, Sodium, Potassium, Iron and Magnesium) in radish leaves, soybean sprout and chwi namul by 1 minute sauting was the range of 83.2 to 99.1%. It was shown that sauting was desirable method for all three vegetables. The residual rate by the cooking method was sauting, steaming, boiling, in that order, but boiling in radish leaves and chwi namul were more desirable method than steaming for Calcium use. At the cooking method and cooking time, Potassium content in soybean sprout was reduced remarkably in 5 minutes boiling. Boiling of radish leaves and soybean sprout showed that Sodium was reduced remarkably after 5 minutes of boiling, 54.4% for radish leaves and 19.9% for soybean sprout, respectively.

• Korean Journal of Soil Science and Fertilizer
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• v.5 no.1
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• pp.17-23
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• 1972

The effect of completed mineral fertilizer on barley was investigated on ordinary upland and newly recrimed soil derived from granite, basalt and shale. 1. Yield of barley grains with application of completed meneral fertilizer 1 level varied from 100.8% to 233.1% on various soils in different parents rock, and 2 levels of the fertilizer varied from 250.1% to 309.5% on ordinary upland and newly recrimed soil derived from granite compared with control plot. But no effect on newly recrimed soil derived from basalt and shale. 2. $P_2O_5$, MgO and B contents in straw were increased, but Mn contents was decreased on all of soil. N contents in straw was decreased on the soil derived from granite, but $K_2O$ contents was increased on the soil derived from basalt and shale. 3. Relation between the yield and absorbed nutrient had related with positive correlection of 1-5%. 4. N and Mn contents in soil were decreased by application of completed mineral fertilizer, but soil pH, C.E.C. $Av-P_2O_5$, Ex-CaO, Ex-MgO and B contents were increased. Especially soil pH and C.E.C. were increased remarkably. 5. Relation between the yield and Ex-CaO and Ex-MgO contents in soil had related with positive correlation, but Mn contents had related with negative correlation.

• Asian Journal of Turfgrass Science
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• v.16 no.2
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• pp.65-73
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• 2002

Studies were conducted to determine the effect of undersoil heating on growth and quality of turfgrasses including Kentucky bluegrass (Poa pratensis L.‘Nuglade’), perennial ryegrass (Lolium perenne L.‘Accent’), tall fescue (Festuca arundinacea Schreb.‘Pixie’), and Korean lawngrass (Zoysia japonica Steud.) in simulated athletic field during winter season in Korea. Mineral contents in clippings of turfgrasses grown at different soil mixtures and temperatures were also analyzed. Undersoil heating (approximately 20$\pm$2$^{\circ}C$) was effective in protecting turfgrasses except Korean lawngrass from freezing injury and discoloration of shoots due to extremely cold temperatures during midwinter. Among turfgrasses grown at undersoil heating zone, tall fescue and perennial ryegrass showed the highest clipping weights and chlorophyll contents, respectively. However, anthocyanin contents of shoots were higher in Kentucky bluegrass. There was little or no difference in clipping weights, chlorophyll contents, anthocyanin contents and greenness of shoots between turfgrasses grown at two soil mixtures composed of 80% sand＋10% peat moss＋10% soil (v/v/v) and 80% sand＋20% pea moss (v/v). Contents of mineral K, Ca and Mg in clippings of cool-season turfgrasses were comparatively higher in a soil mixture composed of 80% sand＋10% peat moss＋10% soil, but little difference in contents of N and P was observed between two soil treatments. Results indicated that undersoil heating can improve quality of turf surface by thawing soil, melting snow, and maintaining shoot growth and greenness of turfgrasses in sports field during winter season.

• Journal of the East Asian Society of Dietary Life
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• v.16 no.5
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• pp.564-572
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• 2006

The application of Consomm prepared with different ingredients of ground beef and ground chicken ingredients to improve the taste preferences and reduce saving the food cost of Consomm was attempted by reviewing fundamental data and its examining the effect on the physicochemical characteristics of treatment. These treatments were prepared with the following different ratios (9:1, 7:3, 5:5, 3:7, 1:9 ; w/w) of ground beef to and ground chicken: 9:1, 7:3, 5:5, 3:7, and 1:9, w/w, respectively. Gelatin contents were increased significantly with by increasing the mixed ratio of ground chicken. The free sugars identified from Consomm were, glucose, fructose, and sucrose. Free sugar contents, increased significantly by with increasing the mixed ratio of ground beef. (Ed- what are the highlighted treatments? You need to explain in this abstract otherwise the reader doesn't know. For simplicity I suggest you don't use such nomenclaturehere in the abstract and simplify with merely the weight ratios. Confirm the changes that I've made) The highest and lowest free sugars werewas shown at A9:1 and 1:9 treatments, respectively whereas the lowest value was shown at I treatment. As many as 20 different kinds of free amino acids were detected infrom the Consomm and the amount of total amino acids waswere increased with by increasing the mixed ratio of ground chicken. The contents of arginine, glutamic acid and alanine contents were high in the free amino acids of Cconsomm prepared with different ingredients. The In the changes of mineral contents in the Consomm prepared with different ingredients, the mineral showed high contents increased according to in the following order of: K, Na, P, Mg, Ca, Fe, and Zn. From the The results of analysis results, in the Relatin contents, free sugars, free amino acids and mineral contents were all increased with by increasing the mixed ratio of ground chicken. The 7:3 treatment showed From above results, it was showed that B treatment prepared with a ratio of 1 ground beef to 3 ground chicken was the bestmost preferred in physicochemical qualities.

• International Journal of Industrial Entomology and Biomaterials
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• v.38 no.2
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• pp.25-30
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• 2019

Atmospheric-pressure plasma technique is a technology for sterilizing agricultural product. In this study, dielectric barrier discharge plasma was applied to silkworm powder for 1 to 5 h with less than 2 ppm of $O_3$ and $NO_2$. Quantitative compositions including proximate contents, mineral and heavy metal contents, fatty acids, vitamins, and DNJ contents were measured. Proximate contents of silkworm powder were protein (57.2%), fat (9.9%), fiber (4.6%), ash (10.1%), and moisture (5.7%). These compositions were not affected by the treatment of plasma. Silkworm powder has 5 abundant minerals potassium (K), phosphorus (P), sulfur (S), calcium (Ca), and magnesium (Mg). Among these minerals, plasma treatment decreased the contents of P and S sharply from 732.3 to 176.8, and 492.7 to 185.2 mg/100g, respectively. Heavy metal contents including lead (Pb), cadmium (Cd), arsenic (As), and mercury (Hg) were not detected in the silkworm powder. Five vitamins such as ascorbic acid (13.6 mg/100g), riboflavin (5.4 mg/100g), ${\beta}$-carotene (1.8 mg/100g), niacin (0.6 mg/100g), and thiamine (0.4 mg/100g) were not significantly changed by plasma treatment. Silkworm powder is composed of 30 parts saturated fatty acids and 70 parts unsaturated ones. The fatty acid composition was not significantly changed by plasma treatment. The DNJ content of silkworm powder (3.72 mg/g) was also nearly constant within the experimental condition of plasma treatment.

• 한국지구과학회:학술대회논문집
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• 2005.09a
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• pp.317-317
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• 2005

• Korean Journal of Fisheries and Aquatic Sciences
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• v.31 no.2
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• pp.245-251
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• 1998

A 10-week feeding experiment was conducted to determine the influence of several minerals from dietary mineral premix on growth and body composition in juvenile Korean rockfish. Three replicate groups of fish Initially averaging 4.2 g were fed one of the ten experimental diets. Korean rockfish muscle and casein as protein sources were used in the basal diet, and deleted one of each mineral (P, Ca, Zn, Mg, Fe, K, Mn, Se or all) in the control mineral premix, Weight gain, feed efficiency and nutrient retention in fish fed the diet not containing mineral premix were significantly lower than those in fish fed other diets (P<0.01). Weight gain in fish fed the diets deleted each mineral (P, Ca, Zn, Hg, Fe, K, Mn or Se) was lower than that of control diet (P<0.01), Feed efficiency and protein retention in fish fed the diets deleted each of P, Ca, Zn or Mn were lower than those ot control diet (P<0.01). Daily feed intake and lipid retention were not affected by dietary mineral premixes ( P>0.01). Proximate analysis and mineral contents in the whole body, muscle, liver or bone of fish fed the diets deleted each mineral were not different to control diet ( P>0.01). The data obtained in this study indicate that each of the P, Ca, Zn, Mg, Fe, K, Mn or Se is essential for normal growth of Korean rockfish.

• Applied Chemistry for Engineering
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• v.28 no.6
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• pp.632-637
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• 2017

The vehicle lubricant occupies upto 35% in a total lubricant market and engine oil occupies upto 77% in the vehicle lubricant market in Korea. A suitable quality management of the circulating engine oil is necessary for driver and engine protection. But, KS and synthetic engine oil products (involved over 30% synthetic oil) are exempt to any quality management under Petroleum and Alternative Fuel Business Act. It is also known that synthetic oils such as PAO (poly alpha olefin) have excellent properties and performance like anti-wear, varnish control and oxidation stability than those of mineral oils. For this reason, PAO has been used for an engine oil, rotary screw and reciprocating compressor in addition to heavy duty and other extreme service applications. In this study, our research group analyzed the chromatogram pattern for the mineral oil, PAO and mineral oil involved a typical ratio of PAO using SIMDIST (simulated distillation). In the SIMDIST chromatogram, the mineral oil showed a broad peak, while PAO showed a sharp typical peak. Also the oil with a large viscosity grade exhibited a long retention time due to the heavy molecular weight and high boiling point. In particular, the blended mineral oil with 20% PAO sample showed a distinctly different pattern compared to that of using the conventional mineral oil. For monitoring PAO contents in distributing engine oils, we analyzed the SIMDIST for 27 kinds of engine oils which were popularly sold in Korea. The analytic results indicate that all kinds of engine oils showed that PAO contents were below 20% in engine oil products. Moreover, the PAO titled product was found to have a small amount of PAO. Thus, we conclude that the related laws for the proper quality management of synthetic oils are needed to be established.

• Journal of the East Asian Society of Dietary Life
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• v.16 no.6
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• pp.670-676
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• 2006

We investigated the general composition, fatty acid composition and mineral content of ten kinds of marketed(3 domestic and 7 imported) mackerels. The moisture contents of domestic mackerels ranged from $62.9{\sim}67.8%$, and those of imported mackerels ranged from $61.1{\sim}74.7%$. Ash content was less than 2% in all mackerels. Crude protein content was greatest in Oman mackerel(24.1%) and lowest in UK mackerel(19.7%). Lipids contents ranged from 1.4%(Chile mackerel) to 19.7% (UK mackerel); mackerels with high lipid content tend to have low moisture content. Saturated fatty acids ranged from 18.2% to 31.1% of the total fatty acids content. The mackerel imported from Chile(26.8%) contained the least monoenes, while UK mackerel monoene content(48.7%) was highest. Polyenes were lowest in Tong-yeong mackerel(30.9%) and highest in Chile mackerel(50.0%). DHA content was highest in Chile mackerel(36.4%) and lowest in USA mackerel(14.6%). The mineral content of mackerels were in increasing order; K, Na, Mg, Ca, Fe, Zn and P. The K, Na, Mg and Ca content ranged from $261{\sim}420$, $261{\sim}420$, $37{\sim}176$, $34{\sim}49$ and $5{\sim}22mg/100g$, respectively.