• 한국해양학회지
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• v.12 no.1
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• pp.41-47
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• 1977

The present paper deals with nine kinds of trace metal contents among 79 samples, more than 20 species of edible marine algae collected during 1973∼1975 along the coasts of Korea. Among the metals detected by the atomic absorption spectrometer, Mg content is variable in 2.09∼13.84mg/g-dry on an average and 5.31mg/g-dry in a mean of green, brown and red algae, whereas Fe is 0.148∼2.343 and 0.747mg/g-dry; Mn 0.015∼0.191 and 0.063mg/g-dry; Zn 0.007∼0.082 and 0.030 mg/g-dry; Cu 0.005∼0.054 and 0.017mg/g-dry; Pb 0.0017∼0.082 and 0.0043mg/g-dry Co 0.0009∼0.0024 and 0.0016mg/g-dry; Cd 0.0002∼0.0034 and 0.0011mg/g-dry, and Cr is 0.0007∼0.0074 and 0.0021mg/g-dry, both on an average and in a mean respectively. The trace metal contents in the seaweeds investigated are variable according to species, collecting seasons, places and kinds of metal It is interesting that in Sargassum thunbergii some metal contents such as Fe, Mn, and Zn are specially high in September1974 through the year investigated.

• Journal of the East Asian Society of Dietary Life
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• v.11 no.4
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• pp.289-294
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• 2001

Yields of shells, appearance of the shellfishes, mineral contents of the shells and their hot water extracts were determined in six shellfishes such as corb shell(CS). short neck clam(SNC). taste clam(TC), ark shell(AS). top shell(TS) and oyster(OY) from the western coast of Korea. Yields of shells in shellfishes were 70.I~80.5% but yields of TC was the lowest as 40.7%. The highest among weight of the shell the shellfishes was the TS(26.2g) and the lowest weight was TC(5.6g) Colors of CS, SNC, TC. AS. TS and OY were yellowish brown, brown, black. greenish brown and gray. respectively. Ca content of the shell of shellfishes was 36.23~38.78% and the content of K and Na were 0.23~4.54% and 1.48~l.59%, respectively. Contents of Na, Mg, Fe. Mn, Zn, Cu. P and S were in the range of 0.01~0.21%. It also contained heavy metals, such as Pb(1.90~7.75 ppm), Cd(0.5~4.50 ppm), As (1.40~4.30 ppm), Se (0.2~l.50 ppm). Cr(1.00~8.30 ppm) and Hg(0.002~8.2 ppm), Ca content in hot water extracts of shell of shellfish was the highest in TC(2,448 mg/100 g), and the lowest in SNC(115 mg/100 g). K content in TC extracts was the highest with the levels of 952 mg/100 g. P content of TC and SNC were 201 and 0.36 mg/100 g, respectively. The contents of Pb, As, Se and Cr were the highest in the extracts of TC and were 110. 40. 90, 20 $\mu$g/100 g, respectively. But Cd was not detected in the extracts of SNC.

• Bulletin of the Korean Mathematical Society
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• v.37 no.3
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• pp.429-435
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• 2000

Our main goal is to show that if there exist Jordan derivations D, E and G on a noncommutative 2-torsion free prime ring R such that$(G^2(x)+E(x))D(x)=0\ or\ D(x)(G^2(x)+E(x))=0\ for\ all\ x\inR$, then we have D=o or E=0, G=0.

• Journal of the Society of Cosmetic Scientists of Korea
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• v.50 no.1
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• pp.77-84
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• 2024

Four children's cosmetic sets were purchased online, labeled for use from 4 years of age, and 81 components of each were analyzed for lead, cadmium, arsenic, antimony, nickel, cobalt, copper, chromium, and mercury by inductive coupled plasma - mass spectrometry (ICP - MS). The average metal concentrations were as follows: 0.82 ㎍/g for lead, 0.03 ㎍/g for cadmium, 0.97 ㎍/g for arsenic, 0.52 ㎍/g for antimony, 2.32 ㎍/g for nickel and 0.01 ㎍/g for mercury which was lower than the acceptable standards for all products. Higher mean values of lead, antimony, cobalt, and copper were detected in imported than domestic products (p < 0.05). There was a statistically significant difference in the average values of heavy metals according to the type of cosmetics (p < 0.05), with eyeshadow showing the highest mean values of arsenic 2.47 ㎍/g, nickel 6.36 ㎍/g, and chromium 11.06 ㎍/g. and the highest mean concentrations were 1.20 ㎍/g for lead, 1.17 ㎍/g for antimony, and 23.60 ㎍/g for copper in blusher. The levels of cobalt in the 81 children's cosmetics were ND ~ 5.23 ㎍/g, copper were ND ~ 379.61 ㎍/g, and chromium were detected ND ~ 36.95 ㎍/g, respectively. Brown colored cosmetics had the highest mean concentrations of nickel and cobalt. Purple-colored cosmetics had the highest mean concentration of lead and chromium.

• Journal of Nutrition and Health
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• v.24 no.5
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• pp.442-449
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• 1991

Concentrations of iron. zinc, and copper were measured in human milk samples collected longitudinally from 21 highly selected. healthy lactating women. And the daily milk and trace elements intakes of 14 exclusively breastfed infants were determined by the test-wei-ghing procedure and the direct analysis of milk samples at 6 or 7weeks postpartum. Significant decreases in iron. zinc and copper were found with time postpartum. Iron contents decreased from 0.33$\mu\textrm{g}$/$m\ell$ at 2-5 days to o.21$\mu\textrm{g}$/$m\ell$ at 12weeks. Zinc concentrations also declined from 4.15$\mu\textrm{g}$/$m\ell$ in colostrum to 2.33$\mu\textrm{g}$/$m\ell$ in matured milk at 12 weeks. Mean copper levels of colostum, transitional. and matured milk were 0.21$\mu\textrm{g}$/$m\ell$, 0.34$\mu\textrm{g}$/$m\ell$, and 0.26$\mu\textrm{g}$/$m\ell$ respectively. Data indicated that the amount of milk ingested ranged from 432g/day to 1266g/day and the mean intake was 768g/day. Daily mean intakes for iron, zinc, and copper were 0.19mg, 2.10mg, and 0.15mq respectively.

• Kyungpook Mathematical Journal
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• v.45 no.3
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• pp.395-404
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• 2005

Let α be a complex number with 𝕽α > 0. Let the functions f and g be analytic in the unit disc E = {z : |z| < 1} and normalized by the conditions f(0) = g(0) = 0, f'(0) = g'(0) = 1. In the present article, we study the differential subordinations of the forms $${\alpha}{\frac{z^2f^{{\prime}{\prime}}(z)}{f(z)}}+{\frac{zf^{\prime}(z)}{f(z)}}{\prec}{\alpha}{\frac{z^2g^{{\prime}{\prime}}(z)}{g(z)}}+{\frac{zg^{\prime}(z)}{g(z)}},\;z{\in}E,$$ and $${\frac{z^2f^{{\prime}{\prime}}(z)}{f(z)}}{\prec}{\frac{z^2g^{{\prime}{\prime}}(z)}{g(z)}},\;z{\in}E.$$ As consequences, we obtain a number of sufficient conditions for star likeness of analytic maps in the unit disc. Here, the symbol ' ${\prec}$ ' stands for subordination

• Journal of the Korean Society of Marine Environment & Safety
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• v.20 no.5
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• pp.461-467
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• 2014

The growth and production of Pseudoblennius cottoides (1.80~10.01 cm TL) were investigated in an eelgrass bed of Dongdae Bay, Korea throughout 2006. A total 702 P. cottoides were collected with a small beam trawl. Growth in fish total length was expressed as: $TL=0.0539d^{0.9105}$. The relationships between total length body weight was estimated as $W=0.0079TL^3.1103$. The densities, biomass, daily, annual production, and P/B ratio were $0.06{\pm}0.062/m^2$, $0.10{\pm}0.144g/m^2$, $0.0005{\pm}0.0006g\;AFDW/m^2/day$, $0.1833g\;AFDW/m^2/year$, and 1.813, respectively. Monthly production of P. cottoides were greatly peak in May, July and September (0.0029, 0.0031 and $0.0019g\;AFDW/m^2/day$) when the biomass was high, and the lowest value in December (0.00004g AFDW/m^2/day) when the biomass was low. Monthly change in production of P. cottoides was positively correlated with biomass and temperature.

• Korean Journal of Food Science and Technology
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• v.21 no.4
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• pp.498-504
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• 1989

Processing conditions and food components of frozen seasoned anchovy meat products were investigated. The separated anchovy meat was chopped, mixed with 12.8% emulsion curd, 0.5% table salt, 2.0% sugar, 0.4% sodium bicarbonate, 0.2% polyphosphate, 0.2% monosodium glutamate, 0.3% onion powder, 0.1% garlic powder, 0.1% ginger powder, 3.0% soybean protein, and 0.2% sodium erythorbate by remodeled stone mortar. This seasoned anchovy meat was frozen with contact freezer, Packed in a carton box and then stored at $-25{\pm}2^{\circ}C$. The major fat acids of product were linoleic, oleic, palmitic, docosahexaenoic, linolenic, palmitoleic, eicosapentaenoic acid. Amino acid composition of product were mainly consisted of Glu, Asp, Leu, Lys and Ala. The taste compounds of product were IMP 160.0 mg/100g ; free amino acids such as Glu, His, Ala, Leu 503.7 mg/100g ; total creatinine 158.3 mg/100g and small amounts of betaine, TMAO.

• KSBB Journal
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• v.5 no.2
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• pp.167-173
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• 1990

This study is to investigate for obtaining the operating conditions of continuous vinegar production using fluidized bed reactor by Acetobacter aceti cell immobilized in Ca-alginate gel. The optimum conditions obtaining by batch fermentation using fluidized bed reactor were as follows; The fermentation temperature and aeration rate were 3$0^{\circ}C$ and 1.0VVM and the initial concentration of ethanol and acetic acid in medium were 33g/l and 27g/l respectively. The amount of bead used was 25%(w/v). The overall acetic acid productivities of batch fermentations by free cell and immobilized cell were 0.31g/l-hr and 0.48g/l-hr, respectively, at the final acetic acid concentration of 50g/l. In the continuous vinegar production using fluidized bed reactor by immobilized cell under optimum conditions, it was possible to produce 23g/l acetic acid continuously up to 90 days with maximum acetic acid productivity of 2.76g/l-hr at dilution rate 0.12hr-1.

• Proceedings of the Plant Resources Society of Korea Conference
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• 2018.10a
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• pp.133-133
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• 2018

The aim of this study was to evaluate the effect of charcoal on germination and early growth of barley sprouts. Five treatments were employed based on different amount and treatment method along with control. Barley seeds were soaked in water for 8 hours. Two types of topping treatment were applied such as, charcoal: 100 g (designated as T1) and charcoal: 200 g (T2). Three kinds of mixing treatment were as follows: barley seeds were mixed with 100g of charcoal (designated as M1), with 200g of charcoal (M2), and with 300g of charcoal(M3). The control did not have any charcoal. In our finding, germination rates were observed 53.3% (control), 26.3%(T1), 36.3%(T2), 67.3%(M1), 81.7%(M2), and 79.7%(M3) at three days after inoculation (DAI). Length of radicle was found at 0.90 cm (control), 0.88 cm (T1), 0.99 cm (T2), 1.03cm (M1), 1.66 cm (M2), and 0.70 cm (M3) in 3 DAI. In addition, sprout length was found 4.5 cm (control), 10.4 cm (T1), 11.9 cm (T2), 5.7 cm (M1), 6.3 cm (M2), and 2.1 cm (M3) in 14 DAI. Fresh weight of sprouts were 0.78g (control), 1.03g (T1), 1.07g (T2), 0.96g (M1), 1.07g (M2), and 0.95g (M3). Among the treatment, topping of seeds on 200g of charcoal (T2) showed longest sprout length and fresh weight. Mixing treatments showed higher germination rates and sprout fresh weight. The results may be attributed to difference in micro-climate conditions (mostly temperature and humidity) in the growth boxes in different treatments.