• Asian-Australasian Journal of Animal Sciences
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• v.23 no.1
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• pp.68-73
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• 2010

The aim of the present study was to determine the changes in mineral retention of broiler chicks fed diets based on wheat, sorghum or maize during the first two weeks post-hatch. The retention of five major minerals (calcium, phosphorus, potassium, sodium and magnesium) and four trace minerals (iron, manganese, zinc and copper) was determined on days 3, 5, 7, 9 and 14 of age. The retention coefficients of individual minerals differed widely and the retention coefficients of major minerals were found to be considerably higher than those of trace minerals. Age effects were significant (p<0.05) for all minerals. In general, mineral retention coefficients were highest at day 3, declined to day 7, and remained unchanged to day 14. Decline in mineral retention with age was similar on all three diets. The cereal effect was significant (p<0.05) for several minerals, with a general tendency for the sorghum-based diet to have greater retention than maize- or wheat-based diets.

• Korean Journal of Plant Resources
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• v.11 no.1
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• pp.47-50
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• 1998

For the quantitiative determination of chemical and taste components in black omija(Schizandra nigra Max) and omija(S.chinensis), compositions of free sugars, free amino acids, total amino acids, and minerals were analyzed. Among the total free sugars in black omija and omija, glucose and frutose were major free sugars and sucrose was little amount. The most abundant free amino acid in black imija was histidine and that in imija was serine. The major free amino acid in black omija and omija were histidine, serine, glutamic acid and aspartic acid. The major total amino acids in black omija and omija were glutamic acid, arginine , leucine and histidine. The limiting amino acid of each omija was S-containing amino acids. The abuntdant minerals in black omija and omija were K and Ca.

• Journal of Nutrition and Health
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• v.30 no.1
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• pp.91-99
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• 1997

We have studied the major food sources of minerals and vitamin based on the data from the National Nutrition Survey in 1993. The most important food sources was anchovy for calcium, spinach for vitamin A, and kimchi for vitamin C. The primary source of iron, thiamin, riboflavin and niacin was rice. Number of foods providing 90% of individual nutrient intake were 54 items for calcium, 40 items for iron, 20 items for vitamin A, 25 items for thiamin, 29 items for riboflavin, 39 items for niacin and 18 items for vitamin C. Among regions, amount of nutrients from same foods(10 more important food source) didn't show any significant differences (p>0.05) in minerals and vitamins studied. Over all rice was found to be the most important sources of minerals and vitamins.

• Korean Journal of Soil Science and Fertilizer
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• v.49 no.6
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• pp.813-818
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• 2016

Distribution of clay minerals separated from clay fraction of corn fields in Korea has been investigated along with their characterization. Crystalline phases of the clay minerals were identified by powder X-ray diffraction (XRD) pattern, and their relative chemical compositions were analyzed by X-ray fluorescence spectrometry (XRF). The soils were found to have pH 6.4, organic matter $37.2g\;kg^{-1}$, available $P_2O_5$ $599mg\;kg^{-1}$, respectively, and exchangeable K, Ca and Mg were 1.2, 7.3 and $1.8cmol_c\;kg^{-1}$, respectively. Major primary minerals consisted mainly of quartz and mica, and kaolinite and chlorite were identified as major secondary clay minerals. For most of soils, mica phase was identified to be muscovite rather than biotite. The average contents of $SiO_2$, $Al_2O_3$ and $Fe_2O_3$ were 43.7, 23.6 and 8.8%, respectively, although they were different with the locations.

• Proceedings of the Petrological Society of Korea Conference
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• 2000.05a
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• pp.3-11
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• 2000

The earth environment consists of four spheres : geosphere, hydrosphere, atmosphere and biosphere. The geosphere consists mostly of minerals. It, however, contains some water and air in its shallow depth. Although hydrosphere and atmosphere consist predominantly of water and air, respectively, both contain some minerals. The biosphere consisting of various organisms is present in the interfaces of geosphere, hydrosphere and atmosphere. The natural environment of the earth is continuously changing by the interaction of four spheres. It suggests that out relevant environmental problems can not be revolved without understanding the natural relationship of these four spheres. Minerals in our environment are very important because they are the main constituent materials of the earth and they control our environment. The roles of minerals in our environment have not been understood even in the scientific society. Thus their roles have been neglected. Review of studies on the environmental mineralogy so far made at our laboratory and others show that minerals control the environment in various ways. Minerals neutralize the acid water as well as acid rain. Minerals in soils and rocks are major neutralizer of the acid rain. Salinization of sea water is attributed to the ionic substitution between minerals and sea water. Some minerals control the humidity of the air. Corals, the products of biomineralization, are the main carbon controller of the air. Minerals also adsorb heavy metals, organic pollutants and radioactive nuclides. Such remarkable functions for controlling the environment come from the mineral-water reaction and biomineralization. All these phenomena are subjects of the environmental mineralogy, a new field of earth science.

• Journal of Life Science
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• v.19 no.8
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• pp.1088-1092
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• 2009

This study was conducted to determine an estimated value and change in TDF (total dietary fiber) binding major minerals (Ca, P, K Mg) of soybean sprouts depending on cultivation periods of 1, 3 or 5 days, and parts of cotyledon and hypocotyl. The compositions of TDF binding major minerals in soybean sprouts were evaluated by the enzymatic-gravimetric method developed by Prosky and adopted by AOAC. The content of TDF binding P ranged between 915.28 mg and 1037.82 mg per 100 g cotyledon. Average contents of Ca, K, and Mg in cotyledon ranged between 541.67 mg and 634.34 mg, 180.91 mg and 253.98 mg, 231.90 mg and 301.01 mg, respectively, on dry matter basis. The average contents of TDF binding Ca in hypocotyl per 100 g were between 454.36 mg and 540.33 mg, and other major minerals contents were between 149.24 mg and 186.21 mg for P, 164.17 mg and 182.78 mg for K, and 152.53 mg and 161.22 mg for Mg, respectively. The proportional changes of Ca, an estimated value in cotyledon, ranged between 5.58% and 30.98%, 47.18% and 59.10% for P, 95.24% and 95.50% for K, and 58.45% and 68.64% for Mg, respectively, based on dry matter. An estimated value of Ca, P, K, and Mg in hypocotyl ranged between 6.71% and 13.52%, 91.03% and 91.76%, 96.91% and 98.92%, and 61.03% and 66.37%, respectively, on dry matter basis.

• Nuclear Engineering and Technology
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• v.55 no.6
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• pp.2147-2157
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• 2023

The aggregate-forming minerals in concrete undergo volume swelling and microstructure change under neutron irradiation, leading to degradation of physical and mechanical properties of the aggregates and concrete. A comprehensive investigation of volume change and elastic property variation of major aggregate-forming minerals is still lacking, so molecular dynamics simulations have been employed in this paper to improve the understanding of the degradation mechanisms. The results demonstrated that the densities of the selected aggregate-forming minerals of similar atomic structure and chemical composition vary in a similar trend with deposited energy due to the similar amorphization mechanism. The elastic tensors of all silicate minerals are almost isotropic after saturated irradiation, while those of irradiated carbonate minerals remain anisotropic. Moreover, the elastic modulus ratio versus density ratio of irradiated minerals is roughly following the density-modulus scaling relationship. These findings could further provide basis for predicting the volume and elastic properties of irradiated concrete aggregates in nuclear facilities.

• Korean Journal of Soil Science and Fertilizer
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• v.6 no.4
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• pp.253-255
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• 1973

Microscopic method was compared with X-ray diflraction analysis for the identification of rockforming minerals using 11 main rock samples in Korea. 1. There was no difference between X-ray diffraction analysis and microscopic one in major minerals, but some accessary minerals. 2. The rock-forming minerals of main rocks presented in this study occured almost in crystalline state so that they could be easily identified by X-ray analysis alone.

• Journal of the East Asian Society of Dietary Life
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• v.25 no.3
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• pp.417-424
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• 2015

The purpose of this study was to investigate daily nutrient intakes, serum minerals and lipids in university students majoring in physical education. Anthropometric measurement, dietary survey, and blood analysis were conducted and compared between physical education major (PM) and other major (OM) students. Average age was 21.3 years for PM students and 20.8 years for OM students. Body weight and BMI of PM students were significantly higher than those of OM students (p<0.05). Systolic blood pressure of PM students was significantly lower than that of OM students (p<0.05). Daily energy intake was 2,047.4 kcal for PM students and 2,393.9 kcal for OM students, indicating a significant difference. Carbohydrate and vitamin B1 intakes of PM students were significantly lower than those of OM students. Serum calcium was significantly higher in PM students while serum phosphorus and magnesium levels were higher in OM students. Serum total cholesterol and LDL-cholesterol were significantly lower in PM students while HDL-cholesterol was lower in OM students. In conclusion, university students who major in physical education showed higher serum calcium, lower serum phosphorus and magnesium, and lower systolic blood pressure and serum cholesterol levels than other major students. These results show that physical activity as a major course of study is associated with decreased blood pressure and blood lipids as well as altered serum mineral levels.

• Journal of the Korean Society of Food Science and Nutrition
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• v.39 no.7
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• pp.1073-1077
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• 2010

This study was aimed to evaluate the estimated availabilities and contents of major minerals (Ca, P, and Mg) in seven different seaweeds using the neutral detergent fiber (NDF) which could bind minerals. The estimated availability was calculated by subtracting the NDF-bound major mineral contents from the total major mineral contents of seaweeds. Average estimated availability of Ca, P, and Mg contents of seven seaweeds were 96.31, 73.24, and 96.79%, respectively. These results may suggest that seaweeds could be one of the good sources of major minerals for human nutrition because of their high average estimated availabilities of Ca, P, and Mg.