• Asian-Australasian Journal of Animal Sciences
• /
• v.10 no.4
• /
• pp.378-384
• /
• 1997

The ruminal solubility of copper (Cu), manganese (Mn), molybdenum (Mo), and zinc (Zn) in eight Philippine forages was studied. These forages were: 1) grasses: paragrass (Brachiaria mutica (Forsk.) Stapf), stargrass (Cynodon plectostachyum Pilger), and napiergrass (Pennisetum purpureum Schumach.); 2) creeping legumes: calopogonium or calopo (Calopogonium muconoides Desv.) and centrocema (Centrocema pubescens Benth.); 3) tree lequmes: gliricidia or kakawate (Gliricidia sepium (Jacq.) Walp.), leucaena or ipil-ipil (Leucaena leucocephala (Lam.) de Wit.), and sesbania or katuray (Sesbania grandiflora (L.) Poir). Nylon bags with samples were incubated for 0, 3, 6, 12, 24, 48 and 72h in three rumen cannulated sheep fed with timothy hay (Phleum pratense L.) at 2% body weight/d. The 0-h bags were washed with deionized water. There were species differences (p < 0.05) on the different solubilities of trace elements. At O-h incubation, the trend of solubility was Mo (54%) > Zn (43%) > Cu (38.7%) > Mn (29.5%). At 3-h incubation, all the elements except Mn had an average solubility above 50%. Combining particulate passage rate (1.9%/h) and various trace elements disappearance rates, the effective ruminal solubilization (ERS) of trace elements were computed. The ERS across species ranged from 44.6 to 89.9% for Cu, 29.9 to 84% for Mn, 66 to 95.1% for Mo, and 30.1 to 82.3% for Zn resulting to a trend of Mo > Zn > Cu > Mn.

• Asian Pacific Journal of Cancer Prevention
• /
• v.15 no.6
• /
• pp.2625-2629
• /
• 2014

Background: Trace elements are major components of biological structures; however, excessive levels of these elements can be toxic. Materials and Methods: In the present study, serum levels of trace elements were measured in 30 patients with newly diagnosed as prostate cancer and 32 healthy volunteer by using furnace atomic absorption spectrophotometry. Results: It was found that there was an increase in serum levels of Co, Cu, Mg and Pb (p<0.05), whereas a decrease in serum levels of Fe, Mn, and Zn levels in patients with prostate cancer (p<0.05). Conclusions: These changes may be important in the pathogenesis of prostate cancers; however, further prospective studies are needed to identify relationships between prostate cancer and trace elements.

• Economic and Environmental Geology
• /
• v.23 no.3
• /
• pp.329-342
• /
• 1990

The purpose of this study is to clarify the nature of the differentiation and petrogenesis of igneous rocks in comparison with experimental results based on petrological and geochemical criteria. Study area is composed of the Precambrian granitic gneiss complex, Triassic meladiorite and biotite granodiorite, Jurassic biotite granite, and Cretaceous quartz porphyry. According to the data of EPMA, the clinopyroxene and orthopyroxene of meladiorite come under salite and hypersthene, respectively. Such results suggests that meladiorite is incipient differentiated products of basic magma under slow cooling condition. The petrochemical data of variation diagram of major element oxides vs. silica and of trace element oxide vs. silica, AMF triangle diagram and trace elements suggests that igneous rocks of study area are plutonic rocks belong to calc alkali rock series of the source of comagma intruded-emplaced in the order of meladiorite, biotite granodiorite and biotite granite by fractional crystallization of magma.

• Economic and Environmental Geology
• /
• v.24 no.4
• /
• pp.379-391
• /
• 1991

The studied Cretaceous granties are widely distributed at the southern Mungyeong area in the southwestern part of Ogcheon Fold Belt. From the mineralogical and geochemical compositions, it is suggested that they show the characteristics of I-type and magnetite-series and formed under the conditions of high oxygen fugacity. The mineral chemistry of plagioclase, alkali feldspar and biotite in the granites by EMPA, was revealed as albite to oligoclase, microcline to microcline perthite and orthoclase perthite, and annite compositions, respectively. The granites have the distribution patterns of enriched LREE and depleted HREE, and show Eu negative anomalies suggesting mainly due to the feldspar fractionation in the residual magma. The geochemical data of Eu, EU/$^*Eu$, Sm and Gd suggest that the granites of the area have more abundant alkali feldspar crystallization than plagioclase. From the geochemical characteristics of Sr/Ba, La/Sm vs. Ce/Yb and other trace element evidences, the granites were the late stage products of differentiation and fractionated from a homogeneous parental granitic magma.

• The Korean Journal of Quaternary Research
• /
• v.21 no.2
• /
• pp.58-58
• /
• 2007

• Korean Journal of Veterinary Service
• /
• v.47 no.3
• /
• pp.115-122
• /
• 2024

Bovine dermatophytosis is a highly contagious disease that adversely affects animal growth and reduces meat and milk production. Nutritional deficiencies and immune status are suspected risk factors, but their roles remain unclear. This study investigates the association between trace minerals, vitamins, serum biochemical parameters, and immune-related cytokines with bovine dermatophytosis. Forty calves aged 6~7 months were selected and raised together on the same farm. They were divided into two groups: the control group (n=20) and the infected group (n=20). Serum was collected and analyzed for serum trace minerals, vitamins, biochemical parameters, and cytokine levels. Trichophyton verrucousm was isolated from infected calves. The infected calves had significantly lower zinc (P<0.001) and vitamin E (P=0.02) levels and significantly higher interleukin (IL)-6 (P=0.014) and IL-17A (P=0.018) levels. Regarding serum biochemical parameters, glucose (P=0.008) and total bilirubin (P=0.003) levels were significantly higher in the infected calves than in healthy ones. Hyperglobulinemia and high alkaline phosphatase levels were observed in the infected calves, without statistical significance. Our findings suggest the necessity of considering nutritional elements such as zinc and vitamin E for the prevention and treatment of bovine dermatophytosis. Additionally, the observed changes in immune and serum biochemistry factors post-infection may provide a foundation for future research on the host's biological responses to infection.

• Economic and Environmental Geology
• /
• v.31 no.6
• /
• pp.473-483
• /
• 1998

The igneous rocks in the Goseong area are composed of the volcanic rocks (andesitic lapilli tuff and rhyodacite), Bulgugsa granites (Hornblende-biotite granite and two pyroxene granite) and intrusive andesites. In the variation diagrams of the trace and rare earth element contents and elemental ratios as well as the REE patterns, the three igneous rock types show different variational trends and patterns. The geochemical features represent that the igneous rocks in the area were formed from three different magmatic pulses. Two independently carried out Rb-Sr isotope experiments for the Goseong granites show that the whole rock ages and Sr initial ratios of the granites are $66.4{\pm}6.2Ma$, $0.70517{\pm}22(2{\sigma})$ and $71.3{\pm}6.8Ma$, $0.70506{\pm}18(2{\sigma})$, respectively. These results suggest that the granites magma originated from the lower crustal materials of igneous origin intruded into the area during the late Cretaceous period. Masan hornblende-biotite granite emplaced at the vicinity of the Goseong area is very similar to the Goseong granite in its mineral compositions, major, trace and rare earth element contents and patterns. The intruding age (100 Ma) of the Masan granite is order than that of the Geseong granite, however. The similarity of the geochemical natures but the contrast of the intruding ages between the Masan and Goseong granites possibly indicate that the magma generation from the same source materials occurred at a temporal interval of ca. 30 Ma.

• 한국지구물리탐사학회:학술대회논문집
• /
• 2003.11a
• /
• pp.479-492
• /
• 2003

Wheat, barley, rye, and maize were grown in field and pot experiments at various non-contaminated soils in order to establish uptake rates for added selenate, and to find baseline concentrations for various soil types. Edible parts (grains) and stalks of the crops were analyzed separately for Se, as well as for Ca, Cu, Fe, Mn, P, S, and Zn. The addition of Na-selenate in admixture with the NPK 20:8:8 fertilizer had no influence on the composition of the other elements investigated. The proportions of added nitrate: selenate, and sulfate:selenate were kept constant. The Se- uptake rate differed among the cereals tested, it was highest for winter wheat. Utilization of added Se in the field ranged from $0,4-4,7\%$, and and in the pots from $3,3-5,4\%$, it was markedly lower in clay soil. Whereas P and Zn were preferably found in the grains, Ca-Fe-Mn-S got enriched in the stalks. For the fields, the location had some influence upon Fe, Mn, and Zn, whereas it was not important for P, S, Cu, and strikingly, Ca. Pot and field experiments on similar soils led to different results, except for P and S. Maize (whole grains) was significantly lower in Ca, Cu, and Mn, and might even cause trace element deficiencies, if exclusively fed. Few correlations between the trace elements investigated led to the conclusion that most element contents were governed by plant metabolism. Variations of mobile Fe in the soils were balanced by uptake into the stalks. The data are compared with data from other presumably non-contaminated sites.

• The Journal of the Petrological Society of Korea
• /
• v.3 no.2
• /
• pp.109-127
• /
• 1994

We report field relationship, petrography and major and trace element chemistry for the central part of the Seoul granitic bathlith of Jurassic age occurring in the Kyonggi massif. The batholith consists mainly of biotite granite (BG) and garnet biotite granite (GBG) with minor tonalite-quartz diorite and biotite granodiorite with or without hornblende. The mode data, along with the those reported by Hong (1984) for the biotite granite (south-BG) in the southern part of the batholith, indicate that the many of BGs and majority of GBG and south-BG are leucocratic. Major element data indicate that these predominant rocks of the batholith are peraluminous. Variation trends in Harker diagrams for the major and trace elements suggest that the BG and GBG are not related by a simple crystal fractionation process. The same is true between the central (BG and GBG) and the southern (south-BG) parts of the batholith, suggesting that the central and southern parts of the Seoul batholith may consist of three separate intrusions. Tectonic discriminations using major and trace element data and the age of emplacement suggest that the batholith represents Jurassic plutonism related to an orogeny, perhaps to a subduction-related continental magmatic arc.

• Korean Journal of Pharmacognosy
• /
• v.13 no.3
• /
• pp.102-105
• /
• 1982

Nine trace elements in Bear Galls(Fel Ursi) studied in this paper are Na, Mg, K, Ca, Cu, Zn, Fe, Pb and Ge. The contents of Na, Mg, K, Ca, Cu, Zn, Fe, Pb are determined by atomic absorption spectrometry and Ge is determined by graphite atomic absorption spectrometry. In both methods, the sample is digested with nitric-perchloric acid and then ashed. The results of analysis are shown in table and the result obtained from this study are as follows. a. The highest content of trace element of Bear Gall is Na and other elements are getting lower in order of K, Mg, Ca, Ge, Zn, Fe, Cu, and Pb. b. Particularly the content of Ge in Bear Gall was determined.