• Applied Biological Chemistry
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• v.40 no.4
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• pp.347-351
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• 1997

Contents of heavy metals in sea waters, sediments, fishes, and shellfishes from Kunsan Changhang coastal areas were investigated. Average contents of heavy metals in sea water were Pb 2.35, Cd 0.52, Cu 2.09, Zn 13.65 and $Hg\;0.24\;{\mu}g/l$. Average contents of heavy metals in sediments were Pb 19.49, Cd 0.15, Cu 9.31, Zn 20.07 mg/kg, and $Hg{\;}13.6{\;}{\mu}g/l$. Average contents of Pb, Cd, Cu, Zn, and Hg in .Acantogobius hasta were 1.08, 0.05, 2.24, 58.14, and 0.151 mg/kg and those in Mugil cephalus were 1.63, 0.05, 1.51, 32.69, and 0.065 mg/kg. Accumulation ratios of Pb and Cu in Acantogobius hasta were similar to Mugil cephalus but accumulation ratios of Zn and Hg in Acantogobius hasta were higher 2 times than in Mugil cephalus. Average contents of Pb, Cd, Cu, Zn, and Hg in Cyclina sinensis were 1.03, 1.23, 6.83, 75.83, and 0.071 mg/kg and those in Ruditapes philippinarum were 0.93, 0.86, 5.90, 52.16, and 0.074 mg/kg. Accumulation ratios of heavy metals in shellfishes were in the order of Cu>Cd>Zn>Pb>Hg, irrespective of shellfishes kind.

• Journal of The Korean Society of Grassland and Forage Science
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• v.24 no.4
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• pp.271-280
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• 2004

This pot experiment was conducted to investigate the effects of systematic variation appling of Fe, Mn, Cu, and Zn on forage performance of orchardgrass and white clover. The treatments of systematic variation were 0/100, 25/75, 50/50, 75/25, and $100/0\%$ in the Fe/Cu(trial-1), Mn/Zn(trial-2), and Fe+Cu/Mn+Zn(trial-3), respectively. The treatments of Fe/Mn/Cu/Zn(trial-4) were $70\%$ in main-element and $10\% in other 3 sub-elements, respectively. 1. Compared with orchadgrass, white clover showed relatively consistent differences in the content of micronutrients as influenced by treatments of the systematic variation. The contents of Mn and Cu in the forages were significantly influenced by the application rates of Mn and Cu, respectively. The contents of Fe and Zn in the forages, however, were not significantly different among these treatments. 2. Compared with orchardgrass in the Fe/cu trial, white clover had not only the low content of Cu but also the Cu content and yield of white clover were greatly decreased by the low rate of application of Cu. In the Mn/Zn trial, the $0/100\%$ resulted in the severe decrease of Mn-content in both forages. The low content of Mn in white clover tended to be negatively correlated to the Mn-chlorosis, inferior growth and flowering, and low yield. 3. In the Fe+Cu/Mn+Zn trial, the application with $0/100\%$ and $0/100\%$ resulted in the relatively great decrease of Cu and Mn contents, respectively. These traits in white clover tended to be negatively correlated to the inferior growth and flowering, and low yield 4. In the Fe/Mn/Cu/Zn trial, the content of every main-elements in the forages were increased especially in Mn. In addition, the contents of sub-elements were likely to be somewhat negatively influenced by the treatment of main-element respectively.

• Journal of Animal Science and Technology
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• v.44 no.4
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• pp.399-406
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• 2002

An experiment was conducted to investigate the effects of supplemental copper or/and zinc methionine chelates(Cu-Met or/and Zn-Met) on the performance, nutrient digestibility, serum IgG level, gizzard erosion, and the contents of Cu and Zn in liver and excreta of broiler chickens. One thousand d-old broiler chickens (Ross$^{(R)}$) were assigned to 4 treatments: control, 100 ppm Cu in methionine chelate(Cu-Met), 100 ppm Zn in methionine chelate(Zn-Met) and 100 ppm Cu plus 100 ppm Zn in methionine chelate(Cu-Zn-Met). Each treatment had five replications of 50 (25 male + 25 female) birds each. Average weight gains of chicks fed chelated Cu or/and Zn were significantly higher than that of chicks fed the control (P<0.05). Moreover, feed conversion rates of chicks were better in the chicks fed chelated Cu or/and Zn than in the chicks fed the control (P<0.05). The birds fed the chelated Cu and Zn(Cu-Zn-Met) tended to perform the best growth rate and feed conversion rate. Nutrient digestibilities were not affected by the dietary treatments. Serum IgG level of chicks fed Cu-Zn-Met was significantly higher than that of chicks fed the control (P<0.05). Gizzard erosion index was not significantly different among the treatments. The contents of Cu and Zn in liver were not significantly affected by the dietary treatments. The excreta contents of Cu or/and Zn were significantly high in the birds fed supplementary Cu or/and Zn. It was concluded that dietary supplementation of Cu or/and Zn in methionine chelated form improved growth and feed conversion efficiency of broilers.

• Journal of Nutrition and Health
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• v.30 no.9
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• pp.1045-1049
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• 1997

In order to study the content of selected elements in the organs of the mice, mice were fed with green juice of Angelica keiskei Koidz for 16 weeks. The results obtained from the experiments are summarized as follows : 1) The element contents(cr, Mn, Ni, Cu, Zn, Cd, Ba, Pb, and Fe) in the whole plant are generally the same as those the previous reports. 2) The element contents(Cr , Mn, Ni, Cu, Zn, Cd, Ba, Pb and Fe) in the green juice did not exceed those of the edible water standard. 3) The element contents (Cr, Mn, Ni, Cu, Zn, Cd, Ba, Pb and Fe) in the brain is slightly higher than those in the whole plants. 4) The element contents(Cr, Ni, Pb and Fe) in the organs of the mice fed green juice for 16 weeks are the same as those of the previous reports.

• Korean Journal of Soil Science and Fertilizer
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• v.39 no.4
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• pp.214-223
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• 2006

For better management of micronutrients in crop cultivation, the availability of micronutrients in the soils must be updated and evaluated as a first step. This study was conducted to investigate the distribution of micronutrients in soils of plastic film houses. Total 396 soil samples were collected from the plastic film houses of various crops in Yeongnam province (strawberry, 96; red pepper, 66; tomato, 74; oriental melon, 97; cucumber, 63). Total and available contents of B, Cu, Zn, Fe, and Mn in the soils were determined. Available B was extracted with hot water and available Cu, Zn, Fe, and Mn were extracted with 0.1 N HCl. Mean values of total contents of B, Cu, Zn, Fe, and Mn in the plastic film house soils were 25, 32, 74, 21,316, and $420mg\;kg^{-1}$, respectively. Total contents of micronutrients in the plastic film house soils were similar to those found in the open fields nearby, while they were different among the locations investigated. Mean contents extractable B, Cu, and Zn in the plastic film house soils were 2.1, 7.5, and $35mg\;kg^{-1}$, respectively. The contents of extractable B, Cu, and Zn in the plastic film house soils were higher than those found in the open fields nearby with exceptions of B in soils of strawberry and Cu in soils of red pepper and oriental melon. However, mean contents of extractable Fe and Mn in the plastic film house soils were 156 and $146mg\;kg^{-1}$, respectively, and the mean content of extractable Fe was much lower than that found in open fields nearby. The contents of extractable Zn, Fe, and Mn were higher than the sufficient levels for the crop requirements in most of the plastic film house soils investigated. Contents of extractable Cu in most soils of strawberry, tomato and cucumber cultivations were higher than the sufficient level. However, extractable Cu contents were below the sufficient level in about 30% of investigated soils of red pepper and oriental melon cultivation. Soils containing higher contents of extractable B than the sufficient level were relatively fewer in comparison to the other micronutrients.

• Journal of Powder Materials
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• v.3 no.3
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• pp.153-158
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• 1996

The exhaust gas from vehicle engines and industrial boilers contains considerable amount of harmful nitrogen monoxide(NO) which causes air pollusion and acid rain. To remove NO catalytic reduction processes using Cu ion exchanged ZSM-5 zeolite have been widely studied. In this study, an attempt was made to fabricate Cu/zeolite catalyst by using high energy ball mill. The catalytic performance of ball milled Cu/ZSM-5 zeolites is analyzed and optimum copper contents was determined. The processing variables were reaction temperature and copper contents. Complete removal of NO gas was obtained at the temperature of 553 K on 10wt.% CU/ZSM-5 mechanically alloyed composite powders. Mechanically alloyed CU/ZSM-5 catalyst showed homogeneous distribution of Cu in ZSM-5.

• Journal of The Korean Society of Grassland and Forage Science
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• v.24 no.2
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• pp.93-104
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• 2004

This pot experiment was conducted to investigate the effects of combined micronutrient application($T_1$; control, $T_2$; Fe, $T_3$; Fe+Mn, $T_4$; Fe+Mn+Cu, $T_5$ ; Fe+Mn+Cu+Zn, $T_6$ ; Fe+Mn+Cu+Zn+Mo, T$_{7}$; Fe+Mn+Cu+Zn + Mo + B) on forage performance of pure and mixed cultures of orchardgrass and white clover. The fifth part was concerned with the changes in the total and relative contents, uptake amounts, and mutual ratios. of micronutrients in forages. The results obtained are summarized as follows: 1. The relative contents(total contents of 6 micronutrients = 100%) of Fe and Mn were considerably influenced by the antagonism between Fe and Mn, and also were influenced by the differences in Mn-absorption between orchardgrass and white clover. Compared with pure culture, orchardgrass showed high relative contents of Mn, and low relative contents of Fe and B in mixed culture. White clover, however, tended to be exactly opposed to the above trends. In relative contents, the T$_6$ 6/ resulted generally in decrease of Fe. However the $T_7$ resulted in increase of Mn and B. In addition, the $T_7$ resulted in decrease of Cu and Zn in orchardgrass, and Mo in white clover. 2. In general, there were differences in the tendency between the yield changes and the uptake amounts of micronutrients. General differences have been showed in the uptake amounts and mutual ratios of micronutrients based on the forage species, pure/mixed culture, additional fertilization, and antagonism. The uptake amounts of total micronutrients were generally increased by the treatments with increased combination. In uptake amounts, the $T_7$ resulted in the increase of Mn and B, and decrease of Mo. 3. The mutual ratios of Fe/Mn, Fe/Cu, and Mn/Cu were considerably influenced by the antagonism between Fe and Mn. At the $T_7$ , very low ratio of Fe/Mo affected by the T6 tended to be somewhat improved because of the decrease of Mo content． The poor growth of forages at the $T_6$ was improved by the $T_7$ . This fact was likely to be caused by the adequate B/Mo ratio.

• Korean Journal of Environmental Agriculture
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• v.5 no.1
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• pp.11-23
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• 1986

Soils and rice plants in wastewater irrigated area of the Mangyeong River receiving waster from the Jeonju Industrial Complex and municipal sewage were sampled at two depths to assess the nature and content of Cd, Cu, Pb and Zn, particularly with respect to distance from wastewater source. For metal levels of soils in these area, no difference in the heavy metal contents between the surface and the subsurface soils was found. Total contents of Cu, Pb and Zn in soils were negatively correlated with distance from the source. A positive correlation was found between contents of total and 0.1N-HCl extractable or $1N-CH_3COONH_4$ extractable heavy metals in surface soils of these area. Total contents of heavy metals in soils were positively correlated with clay, soil organic matter and cation exchange capacity. Heavy metal contents of brown rice sampled at the Jeon-ju Industrial Complex area ranged from 0.15 to 0.91 ppm for Cd, from 1.13 to 5.68 ppm for Cu, from 0.22 to 7.16 ppm for Pb and from 11.74 to 38.66 ppm for Zn. Negative correlation was found between the contents of Cd, Cu, Pb, and Zn in the brown rice and the distance from the source. The contents of Cd, Cu and Zn in rice straw were positively correlated with those in the brown rice.

• Journal of the Korean Society of Food Science and Nutrition
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• v.39 no.7
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• pp.1078-1082
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• 2010

The substantial trace mineral usabilities of seven seaweeds for nutrient evaluation have been studied. As the neutral detergent fiber (NDF) bound trace minerals have been known to be indigestible, these contents were excluded in the digestible trace mineral contents evaluation. Therefore, those four trace mineral contents in seven seaweeds and their NDF-bound contents were estimated. Consequently, the NDF-bound Zn, Cu and Mn contents, except Fe, in seven seaweeds were between 10 and 20% of total trace mineral contents, thus 80~90% of seaweeds trace minerals were observed to be substantially digestible. Although the average estimated availability of Fe in the seaweeds were relatively low, those Zn, Cu and Mn were high in relative to those total contents. Thus, even with consideration of their digestibility, seaweeds could be one of good sources of trace minerals for human nutrition because of their high availabilities of Zn, Cu and Mn.

• Asian-Australasian Journal of Animal Sciences
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• v.17 no.11
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• pp.1575-1581
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• 2004

A total of 96 growing barrows (Duroc${\times}$Landrace${\times}$Yorkshire) at an average BW of 20.2 kg were used to investigate the effects of montmorillonite (MMT) or copper-bearing montmorillonite (Cu-MMT) on growth performance, intestinal microflora, digestive enzyme activities of pancreas and small intestinal contents, and the apparent nutrient digestion. The pigs were allocated to three groups with 32 pigs per treatment for 42 days and the average BW at the end of the experiment was 49.7 kg. The three dietary treatments were basal diet only (control group), basal diet +1.5 g/kg MMT, and basal diet +1.5 g/kg Cu-MMT. The results showed that supplementation with Cu-MMT significantly improved growth performance as compared to control and pigs fed with Cu-MMT had higher average daily gain than those fed with MMT. As compared to control, supplementation with Cu-MMT significantly reduced the total viable counts of Escherichia coli and Clostridium in the small intestine and proximal colon. Supplementation with MMT had no significant influence on intestinal microflora, although there was a tendency for Escherichia coli and Clostridium to be lower than the control. Pigs fed with Cu-MMT had lower viable counts of Escherichia coli in colonic contents than those fed with MMT. Although supplementation with MMT improved the activities of the digestive enzymes in the small intestinal contents, the tendency was not significant. Supplementation with Cu-MMT significantly improved the activities of total protease, amylase and lipase in the small intestinal contents. Supplementation with MMT or Cu-MMT improved the apparent nutrient digestion.