Journal articles: 'Trace element contents'

1

Negi, Jagmohan Singh. "Evaluation of trace element contents inSwertia paniculataWall." Natural Product Research 26, no. 1 (January 2012): 72–76. http://dx.doi.org/10.1080/14786419.2010.535167.

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Iskander, Felib Y., and Karen R. Davis. "Mineral and trace element contents in bread." Food Chemistry 45, no. 4 (January 1992): 269–77. http://dx.doi.org/10.1016/0308-8146(92)90159-y.

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3

Sakuragi, Yoshihide, and Michael E. Lipschutz. "Mobile trace element contents in Jilin chondrite." Earth and Planetary Science Letters 72, no. 2-3 (February 1985): 299–303. http://dx.doi.org/10.1016/0012-821x(85)90015-9.

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4

Wu, Shitou, Yadong Wu, Yueheng Yang, Hao Wang, Chao Huang, Liewen Xie, and Jinhui Yang. "Simultaneous Quantification of Forsterite Content and Minor–Trace Elements in Olivine by LA–ICP–MS and Geological Applications in Emeishan Large Igneous Province." Minerals 10, no. 7 (July 17, 2020): 634. http://dx.doi.org/10.3390/min10070634.

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Olivine forsterite contents [Fo = 100 × Mg/(Mg + Fe) in mol%] and minor–trace element concentrations can aid our understanding of the Earth’s mantle. Traditionally, these data are obtained by electron probe microanalysis for Fo contents and minor elements, and then by laser ablation–inductively coupled plasma–mass spectrometry (LA–ICP–MS) for trace elements. In this study, we demonstrate that LA–ICP–MS, with a simplified 100% quantification approach, allows the calculation of Fo contents simultaneously with minor–trace elements. The approach proceeds as follows: (1) calculation of Fo contents from measured Fe/Mg ratios; (2) according to the olivine stoichiometric formula [(Mg, Fe)2SiO4] and known Fo contents, contents of Mg, Fe and Si can be computed, which are used as internal standards for minor–trace element quantification. The Fo content of the MongOLSh 11-2 olivine reference material is 89.55 ± 0.15 (2 s; N = 120), which agrees with the recommended values of 89.53 ± 0.05 (2 s). For minor–trace elements, the results matched well with the recommended values, apart from P and Zn data. This technique was applied to olivine phenocrysts in the Lijiang picrites from the Emeishan large igneous province. The olivine compositions suggest that the Lijiang picrites have a peridotitic mantle source.

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Hare, Landis, Peter G. C. Campbell, André Tessier, and Nelson Belzile. "Gut Sediments in a Burrowing Mayfly (Ephemeroptera, Hexagenia limbata): Their Contribution to Animal Trace Element Burdens, Their Removal, and the Efficacy of a Correction for Their Presence." Canadian Journal of Fisheries and Aquatic Sciences 46, no. 3 (March 1, 1989): 451–56. http://dx.doi.org/10.1139/f89-061.

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Nymphs of the burrowing mayfly Hexagenia limbata were collected in the field, returned to the laboratory, and dissected to remove the gut contents. Concentrations of four trace elements (As, Cd, Cu, Zn) were determined both for the gut contents and for the body. Trace elements in gut contents represented up to 22% of whole animal trace element burdens. Studies of depuration of H. limbata nymphs held in water for up to 48 h indicate that individuals vary substantially in the rate at which they egest gut contents and that 48 h is not sufficient to ensure a complete emptying of the gut. A model developed to compensate for the presence of gut contents in the determination of body trace element burdens was applied to H. limbata. Comparisons of model estimates with actual body burdens (without gut contents) show that the model accurately predicts As and Cu concentrations, but overestimates concentrations of Cd and Zn by as much as 20%. We suggest that the biases in the model result from assuming that: (a) trace element concentrations in gut sediments are equivalent to those in sediments sampled from the animal's surroundings, and (b) there is no weight loss of gut contents during sample digestion (a two-thirds weight loss of gut contents was in fact observed). These biases may be minimized by, respectively: (a) measuring trace element burdens of gut contents and (b) compensating for weight loss of gut contents during digestion.

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Zaichick, Vladimir, and Sofia Zaichick. "Trace Element Contents in Bone Affected by Osteomyelitis." International Journal of Orthopedics and Rehabilitation 3, no. 1 (May 13, 2016): 2–10. http://dx.doi.org/10.12974/2313-0954.2016.03.01.1.

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Kpomblekou-A, K., R. O. Ankumah, and H. A. Ajwa. "Trace and nontrace element contents of broiler litter*." Communications in Soil Science and Plant Analysis 33, no. 11-12 (July 8, 2002): 1799–811. http://dx.doi.org/10.1081/css-120004823.

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8

Dobrinas, Simona, Alina Soceanu, Gabriela Stanciu, Viorica Popescu, and Luiza Georgiana Arnold. "Trace element levels of three mushroom species." Analele Universitatii "Ovidius" Constanta - Seria Chimie 24, no. 1 (June 1, 2013): 39–42. http://dx.doi.org/10.2478/auoc-2013-0008.

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AbstractThe aim of this study was to determine Cu, Fe and Cr contents of three species of fresh mushrooms and canned mushrooms: white and brown champignon (Agaricus bisporus) and Pleurotus Ostreatus. Were analyzed various plant parts: stem, cap and cuticle of fresh mushrooms and only stem and cap for canned mushrooms. The levels of trace metals of mushroom samples collected from regions of Romania, Poland and Turkey were determined by UV/Visible spectrometry - standard addition method after digestion method. The contents of investigated trace metals in mushroom samples were found to be in the range of 0.01 - 2.26 mg/Kg for chromium, 2.02 - 430.67 mg/Kg for copper and 240.40 - 7952.89 mg/Kg for iron. The iron content was found to be higher than those of the other two minerals in all the samples. Mushrooms species in the highest levels of trace elements were found white champignon for Cu and Fe and brown champignon for Cr.

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9

Xiong, Shui Xiong, Wei Yi Xie, Cheng Cai Huang, and Mu Qing Qiu. "The Characteristics of Trace Metal Elements Accumulation and Distribution in Elsholtzia Harchowensis." Advanced Materials Research 690-693 (May 2013): 1543–46. http://dx.doi.org/10.4028/www.scientific.net/amr.690-693.1543.

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In this paper, the characteristics o f trace metal elements were studied in Elsholtzia harchowensis. The relation of trace elements between plant and soil was studied, and the copper tolerance and mechanism of the plant was discussed in details. The results showed that the trace element contents of the soil was higher, Cu content was highest in these elements, and it was as more 200 times as that of control sites. Cu in the plant was highest in these elements and Cd was lowest. The elements sequence in plant was: Cu> Mn> Zn> Pb> Cd. Element contents in different parts of the plant were: Cu, root> flower> leaf> stem; Cd, leaf> flower> root> stem; Mn, leaf> root > flower> stem; Zn, leaf> flower> stem> root; Pb, root> leaf> stem> flower. There is positive correlation in Cu between plant and soil. The tolerance capacity is higher in the plant.

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10

Şengül, Ümit, and Rıdvan İlgün. "Giresun/Türkiye Orijinli Doğal Tatlı Kestanelerde İz Element İçeriği." Turkish Journal of Agriculture - Food Science and Technology 5, no. 2 (March 1, 2017): 185. http://dx.doi.org/10.24925/turjaf.v5i2.185-190.1151.

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There are hundreds of years old wild sweet chestnut trees grown among alder, hornbeam, and pine etc. trees in natural forest of Giresun/TURKEY. In this study, trace element contents of chestnuts collected from chestnut trees in these natural forests were investigated. For this purpose, A total of eight elements, manganese (Mn), iron (Fe), zinc (Zn), nickel (Ni), cobalt (Co), selenium (Se) and lead (Pb) were determined by Inductively Coupled Plasma-Mass Spectrometry (ICP-MS) in chestnut samples collected from ten chestnut trees. The content of trace elements was determined separately in fruit, bark and pellicle parts of chestnut. In chestnut fruit samples, highest concentration values in mg kg-1 of Mn, Fe, Zn, Ni, Cu, Se, Co and Pb are: 88.29, 72.96, 27.76 8.25, 7.81, 2.28, 0.056 and 0.043 respectively. Chestnut bark has been shown the highest values as Mn 176.01, Fe 96.55, Zn 26.97, Ni 4.33, Cu 8.91, Se 3.08, Co 0.089 and Pb 0.058 mg kg-1. The highest concentrations of trace elements in chestnut pellicle are found as Mn 176.26, Fe 92.98, Zn 60.06, Ni 5.79, Cu 11.4, Se 3.29, Co 0.135 and Pb 0.095 mg kg-1. These results suggest that natural chestnuts grown in the Giresun region are quite rich nutrients in terms of trace element contents.

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11

Wyszkowski, Mirosław, and Marzena S. Brodowska. "Potassium and Nitrogen Fertilization vs. Trace Element Content of Maize (Zea mays L.)." Agriculture 11, no. 2 (January 24, 2021): 96. http://dx.doi.org/10.3390/agriculture11020096.

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This research was conducted to study the impact of potassium and nitrogen fertilizers on the trace element content of maize (Zea mays L.). Higher doses of potassium fertilizer led to a linear increase in cadmium, lead, nickel, zinc, and manganese content, and to lower Fe:Zn and Fe:Mn ratios. Moreover, cobalt level increased in maize upon the lower doses and decreased upon the higher doses of potassium. The impact of potassium fertilizer on the levels of other elements (iron and chromium) in maize was determined by the fertilizer dose and, in particular, by the supply of additional nitrogen. Potassium fertilization led to a higher bioconcentration (BCFactor) of most of the trace elements in the aerial parts of maize. Nitrogen fertilization led to increased contents of manganese and iron, increased Fe:Zn and Fe:Mn ratios, and decreased contents of cadmium, lead, nickel, and cobalt in maize. Compared with potassium, nitrogen fertilization produced less consistent changes in bioconcentration factors for trace elements in the aerial parts of maize.

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12

Saleh, Saleh A. K., Sameer H. Fatani, Heba M. Adly, Altaf A. Abdulkhaliq, and Hiba S. Al-Amodi. "Variations of Hair Trace Element Contents in Diabetic Females." Journal of Biosciences and Medicines 05, no. 01 (2017): 49–56. http://dx.doi.org/10.4236/jbm.2017.51004.

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13

Lipschutz, Michael E., and Stephen M. Samuels. "Ordinary chondrites: Multivariate statistical analysis of trace element contents." Geochimica et Cosmochimica Acta 55, no. 1 (January 1991): 19–34. http://dx.doi.org/10.1016/0016-7037(91)90396-m.

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14

Injuk, Jasna, Marina Nagj, and Vlado Valkovic. "Variations of trace element contents within single tree rings." Analytica Chimica Acta 195 (1987): 299–305. http://dx.doi.org/10.1016/s0003-2670(00)85671-8.

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15

Wies, C., E. K. Jessberger, W. Klöck, M. Maetz, D. Rost, T. Stephan, K. Traxel, and A. Wallianos. "Mineral-specific trace element contents of interplanetary dust particles." Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms 181, no. 1-4 (July 2001): 539–44. http://dx.doi.org/10.1016/s0168-583x(01)00332-9.

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16

Wyszkowski, Mirosław, and Marzena S. Brodowska. "Content of Trace Elements in Soil Fertilized with Potassium and Nitrogen." Agriculture 10, no. 9 (September 8, 2020): 398. http://dx.doi.org/10.3390/agriculture10090398.

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The aim of the study was to determine the effect of increasing potassium fertilization (0, 140, 190, and 240 mg K2O/kg of soil) in the interaction with nitrogen fertilization (130 and 170 mg N/kg of soil) on the trace elements content in the typical, non-contaminated agricultural soil. The trace elements content in the soil depended on nitrogen and potassium fertilization. Potassium fertilization had a more significant effect on trace elements content in the soil fertilized at the same time with a lower nitrogen dose (130 mg N/kg soil). Increasing potassium fertilization increased the content of cadmium by 83% and lead by 32% and reduced the amounts of chromium by 10% and iron by 3% in the soil, particularly in the series with a lower nitrogen dose (130 mg N/kg soil). The effect of potassium fertilization on the content of other trace elements was less unambiguous since, for most of trace elements, lower doses of this fertilizer contributed to growth of trace element, while higher doses lead to a decrease in their accumulation in the soil. Nitrogen fertilization increased the contents of zinc and iron—3%, copper—9%, manganese—12%, chromium—15%, and cobalt—59%, while reducing the contents of cadmium and nickel—24% and lead—45%. Permissible standards for trace elements content in the soil have not been exceeded.

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17

Zinkutė, Rimantė, Ričardas Taraškevičius, and Tomas Želvys. "Major elements as possible factors of trace element urban pedochemical anomalies." Open Chemistry 9, no. 2 (April 1, 2011): 337–47. http://dx.doi.org/10.2478/s11532-011-0012-z.

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AbstractThe relationship between real total contents of the major elements Na, Mg, Al, Si, P, S, K, Ca, Ti, Fe and the trace elements Ag, As, B, Ba, Co, Cr, Cu, Mn, Mo, Ni, Pb, Sb, Se, Sn, V, U, Zn in topsoil from the central part of Vilnius is analysed. The amounts of most elements were determined by energy-dispersive X-ray fluorescence, while amounts of Ag, B, Co were measured by optical atomic emission spectrophotometry. Two factors were distinguished according to major elements: anthropogenic (A) including Ca, Mg, Fe, P, S and clayey (C) including K, Al, Ti. Boron, Mn, Cr and U are significantly correlated with members of both factors, Sb with none of them and other trace elements either with all (Cu, Zn, Pb, Se, Ba, Ni, Co) or with separate (V, Ag, Sn, Mo, As) members of the A-factor. Only B, Mn, Cr, U (partly their additive index Z1) are influenced by the C-factor, while twelve other trace elements (also their additive index Z2) are influenced by the A-factor. The additive index Z of all 17 elements is also affected by the A-factor. Four groups of sites have been distinguished according to normal or higher contents of both factors. The majority of trace element anomalies are related to the sites affected by the A-factor.

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18

Chi, Chang Feng, Jian She Zhang, Chang Wen Wu, Mei Ying Xu, and Bin Wang. "Trace Elements Compositions and Fatty Acid Profiles of Mussel." Advanced Materials Research 554-556 (July 2012): 1064–67. http://dx.doi.org/10.4028/www.scientific.net/amr.554-556.1064.

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The trace element content and fatty acid composition of mussel were analyzed in the study. Mussel was rich in Fe, Mg, Se and Zn, with the contents of 221.44 ±1.64, 26.22±0.90, 24.21±0.27 and 4.27±0.04 mg/100g, which were the essential elements in human body. Saturated fatty acids were found at an average level of 64.30 % and unsaturated fatty acids were found at an average level of 35.70 %, and the content of n-3 PUFA + n-6 PUFA was 17.46 %. The highest content of saturated fatty acids in mussel was C22:6(n-3) (D HA), which accounted for 7.30 %. Therefore, the data on trace element and fatty acid composition of this study will form the basis for further research in this field of mussel chemistry for the benefits of human beings.

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19

Flier-Keller, E. Van der, and W. S. Fyfe. "Geochemistry of two Cretaceous coal-bearing sequences: James Bay lowlands, northern Ontario, and Peace River basin, northeast British Columbia." Canadian Journal of Earth Sciences 24, no. 5 (May 1, 1987): 1038–52. http://dx.doi.org/10.1139/e87-100.

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Cretaceous coal-bearing sequences from the Moose River basin in northern Ontario and the Peace River basin in northeast British Columbia were analysed for trace- and major-element contents. Modes of occurrence of the trace elements are proposed on the basis of Pearson correlation coefficients and scanning electron microscopy coupled with energy-dispersive X-ray analysis.The Moose River basin lignite was deposited in an alluvial floodplain environment, and the restricted mineralogy, dominated by quartz and kaolinite, reflects derivation from a highly weathered terrain. The bituminous coal from the Peace River basin was deposited in an alluvial to deltaic environment, with a dominant mineralogy including quartz, illite, kaolinite, mixed-layer clays, carbonates, barite, feldspar, and pyrite.Trace-element contents in both deposits are comparable to the average concentration in United States coals. Modes of occurrence of trace elements in the coals are extremely variable and depend on local conditions both during deposition and subsequently. Association with the organic matter is the most common mode of occurrence of trace elements in the Moose River basin lignites, whereas clay minerals are important trace-element sites in the Peace River basin coal.Factors including coal rank, clay mineralogy, nature of the surrounding rocks, and composition of the groundwaters appear to have important influences on the concentrations of the trace elements and their siting in the coals.

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20

Bravo Martín-Consuegra, Sandra, Jose A. Amorós Ortíz-Villajos, Caridad Pérez-de-los-Reyes, Francisco J. García Navarro, Rolando Ruedas Luna, and Raimundo Jiménez Ballesta. "Natural Enrichment of Trace Elements in Surface Horizons of Calcareous Soils (La Mancha, Spain)." Journal of Chemistry 2015 (2015): 1–10. http://dx.doi.org/10.1155/2015/606837.

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The study of five soil profiles developed on carbonatic sediments of Tertiary Miocene origin has been carried out. The topography of the area was basically flat and the traditional uses of the soils are the cultivation of dry cereals and grapevine. The geochemical characterization of the aforementioned profiles involves a study of the contents of major and trace elements among other pedologic aspects (texture, pH, organic matter, etc.). The results of this study also indicate a superficial enrichment of trace elements due to the leaching of Ca and moderate biological and anthropic activity. We can consider strontium, Sr, as the trace element that characterizes these limy soils (435 mg/kg average content in total soil and 708 mg/kg in the original rock). These contents are similar to the average value in Castilla-La Mancha of 380 mg/kg and are higher than the average in world soils of about 200 mg/kg. High levels of dangerous or pollutant elements (Cd, Hg, Pb, Cu, Zn, or Ni) were not detected. The majority of trace element anomalies are related to calcareous material and the leaching of calcium carbonate (Ca), while the influence of the anthropogenic factor is secondary. Soil quality does not indicate toxicity although surficial enrichment suggests a weak threat from consuming crops.

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21

TONG, Chunhan. "Some Trace Element Contents of Three Chinese Gold Reference Samples." Geostandards and Geoanalytical Research 14, no. 1 (April 1990): 7–10. http://dx.doi.org/10.1111/j.1751-908x.1990.tb00063.x.

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22

Kula, I., D. Yildiz, Y. Dogan, G. Ay, and S. Baslar. "Trace Element Contents in Plants Growing at Mt. Akdag, Denizli." Biotechnology & Biotechnological Equipment 24, no. 1 (January 2010): 1587–91. http://dx.doi.org/10.2478/v10133-010-0010-x.

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23

Papa, S., G. Bartoli, A. Pellegrino, and A. Fioretto. "Microbial activities and trace element contents in an urban soil." Environmental Monitoring and Assessment 165, no. 1-4 (May 12, 2009): 193–203. http://dx.doi.org/10.1007/s10661-009-0938-1.

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24

Masuzawa, T., M. Koyama, and M. Terazaki. "A regularity in trace element contents of marine zooplankton species." Marine Biology 97, no. 4 (April 1988): 587–91. http://dx.doi.org/10.1007/bf00391056.

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25

Uluozlu, Ozgur Dogan, Mustafa Tuzen, Durali Mendil, and Mustafa Soylak. "Assessment of trace element contents of chicken products from turkey." Journal of Hazardous Materials 163, no. 2-3 (April 2009): 982–87. http://dx.doi.org/10.1016/j.jhazmat.2008.07.050.

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26

Amuno, S. A., and M. M. Amuno. "Spatio-temporal variation of trace element contents in Rwanda necrosols." Environmental Earth Sciences 71, no. 2 (April 16, 2013): 659–74. http://dx.doi.org/10.1007/s12665-013-2467-z.

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27

SARACOGLU, S., K. SAYGI, O. ULUOZLU, M. TUZEN, and M. SOYLAK. "Determination of trace element contents of baby foods from Turkey." Food Chemistry 105, no. 1 (2007): 280–85. http://dx.doi.org/10.1016/j.foodchem.2006.11.022.

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28

Chéry, C. C., S. Herremans, V. Van Lierde, F. Vanhaecke, M. C. Freitas, and R. Jasekera. "Ultra-micro trace element contents in spices from Sri Lanka." Journal of Radioanalytical and Nuclear Chemistry 276, no. 1 (November 24, 2007): 143–47. http://dx.doi.org/10.1007/s10967-007-0423-7.

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29

Nikolaeva, Tatiyana V. "Trace element status of the patients with alopecia areata." Russian Journal of Skin and Venereal Diseases 19, no. 3 (June 15, 2016): 148–51. http://dx.doi.org/10.18821/1560-9588-2016-19-3-148-151.

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The issue of trace elements participation in the pathogenesis of alopecia areata and the mechanisms of change in bio-concentrated trace remains unresolved and requires further consideration. Goal. To rate trace element balance in patients with alopecia areata. Material and methods. The study group consisted of patients with focal forms of alopecia areata (n = 100), the comparison group - healthy individuals (n = 100). The estimate of trace element status was performed by comparative analysis of the contents 11 trace elements (zinc, iron, copper, cobalt, chromium, manganese, nickel, strontium, bismuth, cadmium, lead) in whole blood and hair in the study group. Results. The study reported a significant decrease in the level of zinc and iron in a patient’s blood and an increase in bio-concentrate iron, copper, chromium and nickel in hair ofpatients compared with healthy participants. Trace element analysis of whole blood and hair allowed to suggeste that a cause of an arising microelement imbalance is probably an autoimmune inflammation in the skin ofpatients suffering from alopecia areata. Confirmation of this hypothesis requires further comprehensive studies.

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Litasov, K. D., A. Ishikawa, A. G. Kopylova, N. M. Podgornykh, and N. P. Pokhilenko. "Mineralogy, trace element composition, classification of Onello high-Ni ataxite." Доклады Академии наук 485, no. 4 (May 22, 2019): 484–87. http://dx.doi.org/10.31857/s0869-56524854484-487.

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The trace element composition of the Onello meteorite is analyzed in detail using SEM and LA-ICP-MS. The following Ni contents of minerals are determined (wt %): 23.0-25.4 in taenite, 5.8-8.8 in kamacite, 22-26 in schreibersite, 44-52 in nickelphosphide, 20.6-21.8 in allabogdanite, and 75-81 in awaruite. In the trace element content, the Onello meteorite corresponds to the IAB group of iron meteorites. Inside this group, it mostly matches the sHH subgroup (with high Au and Ni contents). The presence of allabogdanite in the meteorite indicates the high PT parameters of its formation: >8 GPa and 1000-1400 °C. Thus, the formation of the Onello meteorite is related to impact metamorphism of a parental body of iron meteorites of the IAB group and vinonaites, in which a P- and Ni-rich area underwent melting and further crystallization.

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Zhang, Qing Wei, She Li Chai, Jing Cai, and Li Na Gao. "Baseline Concentrations of Trace Metals in Grassland Topsoils from West Jilin Province, Northeast China." Advanced Materials Research 347-353 (October 2011): 2140–45. http://dx.doi.org/10.4028/www.scientific.net/amr.347-353.2140.

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The objective of this study was to determine the baseline concentrations of trace elements in grassland topsoils from 155 soil sampling sites in West Jilin province, Northeast China, to establish the relationships between the trace metal contents and soil physicochemical properties and major oxide contents and among trace metal concentrations themselves, and to identify the possible sources of trace element in soils. The baseline concentrations of trace elements(mg/kg) were: As 3.12-14.18, B 16.17-49.08, Cd 0.037-0.127, Co 0.96-15.28, Cr 18.87-60.83, Cu 10.81-24.75, Hg 0.004-0.035, Mn 171.25-657.87, Mo 0.08-1.15, Ni 6.79-30, Pb 12.58 -26.08, Se 0.03-0.36, and Zn 18.93-61.03. The upper baseline limits of these elements were all less than the Chinese Environmental Quality Standard for Soils, the Dutch Intervention Values for Soils, implying that trace element contents in the studied soils were of the safety levels.Fe2O3 and Al2O3 had stronger correlations with most trace elements than other oxides, and Co,Cr,Cu,Mn, Ni were highly correlated one another. Three types of geochemical associations were distinguished from this study:the first association involving As,Co,Cr,Cu,Mn,Mo,Ni,Pb,Zn,Al2O3 and Fe2O3 was mainly associated with Al,Fe-Mn oxides and/or with the Al-bearing clay minerals, suggesting that the trace elements were mainly derived from lithogenic and pedogenic processes; the second association including Se, Hg, Cd, CaO and organic carbon was mainly associated with organic matter and calcium oxides, showing that Se,Hg and Cd were mainly contributed by anthropogenic sources; the third association containing B, Na2O, K2O, MgO, pH, and electrical conductivity was mainly associated salinization processes of soils, implying that alkaline pH and high Na contents would enhance B concentration of soils.

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32

GARCIÁ, ELENA M., M. LUISA LORENZO, CARMEN CABRERA, M. CARMEN LÓPEZ, and JOAQUIN SÁNCHEZ. "Trace element determination in different milk slurries." Journal of Dairy Research 66, no. 4 (November 1999): 569–78. http://dx.doi.org/10.1017/s002202999900374x.

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We have studied the contents of trace elements of nutritional or toxicological interest in 90 samples of whole, low-fat, skim, condensed, evaporated and powdered milks. Slurries of the samples were prepared with Triton X-100 and analysed using electrothermal atomic absorption spectrometry. The temperature–time programme of the graphite oven was optimized for each element, and the accuracy, precision, selectivity and sensitivity of the method were verified. Concentrations of the trace elements we investigated were: Pb 0–0·211 μg/g, Cd 0–28·985 ng/g, Al 0·528–4·025 μg/g, Cu 0·041–0·370 μg/g, Cr 0–0·177 μg/g, Mn 0·024–0·145 μg/g, Se 0–237·333 ng/g, Zn 0·297–0·827 μg/g and Ni 0·058–1·750 μg/g. (A value of zero indicates that the element was undetectable by our methods.) Concentrations of the pairs of elements Cu–Cd, Mn–Cd, Mn–Cu, Zn–Mn, Ni–Cu, Ni–Mn and Ni–Zn were significantly correlated (P<0·001). Linear discriminant analysis confirmed the separation between the six types of milk analysed.

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33

Yang, Min, Youning Xu, Hailing Ke, and Huaqing Chen. "Cumulative Effect and Content Variation of Toxic Trace Elements in Human Hair around Xiaoqinling Gold Mining Area, Northwestern China." International Journal of Environmental Research and Public Health 18, no. 4 (February 20, 2021): 2074. http://dx.doi.org/10.3390/ijerph18042074.

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The harm of toxic trace element polluted living environments to human health in mining areas has attracted extensive attention. In this study, human hair samples from a toxic trace element polluted area (village A) in a mineral processing area collected in 2015 and 2019 were studied in detail and the nonpolluted human hair samples from a contrast area (village B) with a relatively clean environment were also collected for comparison. The Hg and As in human hair samples were analyzed by Atomic Fluorescence Spectrometry (AFS) and the Pb, Cd, Cr, and Cu in human hair samples were analyzed by Inductively Coupled Plasma Mass Spectrometry (ICP-MS). The single cumulative index (Pi) and the Nemerrow index (Pz) were used to evaluate the single and comprehensive cumulative pollution index. The results indicated that the average toxic trace element contents in human hair from different ages in the polluted area exhibited certain statistical significance. The average single cumulative indexes indicated a significant accumulation of Hg, Pb, and Cd in human hair of both genders and different ages from the polluted area, and the comprehensive cumulative pollution indexes revealed higher accumulation of toxic trace elements in the hair of males than in females. In general, the content of toxic trace elements in human hair from polluted area was still growing in accumulation. The high content of toxic trace elements in human hair shows a notable correlation with human health, and the environmental pollution in gold mining areas is seriously harmful to human health.

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Prundeanu, Ionuţ-Mihai, Ciprian Chelariu, Sorin-Ionuț Balaban, and Ovidiu-Gabriel Iancu. "Distribution and Behaviour of Some Trace Elements as a Function of Apple Varieties in Northeastern Romania." International Journal of Environmental Research and Public Health 17, no. 7 (April 10, 2020): 2607. http://dx.doi.org/10.3390/ijerph17072607.

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The levels and distribution of 9 trace elements in apples from two orchards in north-east (NE) Romania were measured by means of Atomic Absorption Spectroscopy (AAS) on 42 samples of 9 different apple varieties, with average content ranges of 0.909–4.458 mg·kg−1 Zn, 0.055–0.409 mg·kg−1 Cu, 0.700–2.476 mg·kg−1 Fe, 0.328–0.695 mg·kg−1 Mn, 0.054–0.257 mg·kg−1 Ni, 0.005–0.101 mg·kg−1 Cr, 0.027–0.420 mg·kg−1 Co, 0.413–1.149 mg·kg−1 Pb, and 0.025–0.127 mg·kg−1 Cd. For some apple varieties, Pb contents are 2 times higher than the maximum contents allowed according to national standards, Cd contents are 6 times higher, and in some cases Zn contents also exceed the national threshold, showing preferential accumulation on specific apple varieties. Whilst some research has been carried out on trace element distribution in apples, this study assessed the areal distribution of toxic trace elements in connection to the adjacent roads. The first apple orchard is located near a county road, with reduced car traffic, while the second orchard shares its southern limit with a high-volume traffic road (E583). The results point towards a proportional increase of Pb and, to some extent, of Cd in the samples close to the E583 road in contrast with the other orchard, where no such observation derived. Along the areal distribution of the selected elements, the preferential accumulation of dietary recommended trace elements in different apple varieties was assessed. In matters of daily nutrients content in trace elements, the best sources of Fe, Cu, and Zn in terms of apple varieties are Golden Delicious, Jonathan, and Kaltherer Böhmer.

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Alekseev, Ivan, Evgeny Abakumov, Alina Petrova, and Lubov Vorona-Slivinskaya. "Evaluation of the Ecotoxicological State of Selected Soils from Urban Environments of Russian Arctic with the Aim to Substantiate Reclamation and Restoration Strategies." MATEC Web of Conferences 170 (2018): 04001. http://dx.doi.org/10.1051/matecconf/201817004001.

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In recent decades rates of anthropogenic forcing on natural and urban ecosystems in the Arctic are increasingly growing. This tendency requires the development of more detailed environmental monitoring methods. In this context, study of background trace elements contents should be an urgent task. The purpose of authors study was an assessment of trace elements content in soils of urban environments in Yamal region and Murmansk. Twelve sites in Yamal region and four sites in Murmansk in different functional zones were studied during the investigation. Samples were taken from a depth of 0-5 cm and 5-20 cm. The highest contents for Cu, Zn, Ni were found in soil samples from Kharp, which was caused by existing chrome-processing factory. Soil samples from Aksarka and Labytnangi were characterized by the highest median values for Pb. Soil samples from Kharsaim and Kharp key plots were characterized by the highest median values for Zn. This could be explained by geological origin and high regional background concentration element for this trace element. Soil samples collected in Murmansk were characterized by highest medians in Pb, Ni and Mn in topsoil horizons, Mn and Zn in lower horizons. Evaluation of Saet´s index showed the predominance of non-hazardous Zc in most of the soil samples. Predicted climate change and consequent degradation of permafrost in soils could have the behavior of trace elements. Rates of accumulation, transformation, translocation, leaching and transportation of trace elements and other pollutants within the permafrost-affected landscapes could be affected and changed significantly.

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Hu, Yaqi, Wenyong Wu, Di Xu, and Honglu Liu. "Impact of Long-Term Reclaimed Water Irrigation on Trace Elements Contents in Agricultural Soils in Beijing, China." Water 10, no. 12 (November 23, 2018): 1716. http://dx.doi.org/10.3390/w10121716.

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The rapid increase of reclaimed water irrigation on agricultural soils requires investigation of its impact on soil health. In this study, a simulation experiment for various lengths of long-term reclaimed water irrigation time (98, 196 and 236 years, respectively) was conducted in the southeast suburb of Beijing, China. Unirrigated soil served as the control. The environmental behavior of seven trace elements (As, Cd, Cr, Cu, Hg, Pb and Zn) at different soil depths in 0–600 cm profiles was analyzed. Results showed that the 0–30 and 200–300 cm soil layers were more likely to accumulate trace elements under long-term reclaimed water irrigation, although the accumulation in the 0–600 cm profiles was not particularly obvious. Correlation analysis showed that the trace element concentrations and distribution were significantly related to clay fraction and organic matters (OM), whereas they were not related to redox potential (Eh). The potential ecological risk assessment showed that the long-term reclaimed water irrigation did not result in a significantly increased ecological risk. However, Cd and Hg were identified as the metals with the highest potential ecological risk in the study area and the trace element contents in the top 0–30 cm soil layer should be carefully monitored. Future studies are required to clarify the environmental risks of trace elements under long-term reclaimed water irrigation as they might slowly accumulate in soil with time.

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Simon, Tóthmérész, Kis, Jakab, Szalay, Vincze, Baranyai, Harangi, Miskolczi, and Dévai. "Environmental-friendly Contamination Assessment of Habitats Based on the Trace Element Content of Dragonfly Exuviae." Water 11, no. 11 (October 23, 2019): 2200. http://dx.doi.org/10.3390/w11112200.

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We tested the usefulness of exuviae as an environmentally friendly method for exploring the variability of the trace element contents of protected insect populations without killing specimens. It is a notable characteristic of dragonflies that they are good ecological indicators for both aquatic and terrestrial habitat quality. Thus, we investigated the trace element accumulation in different stages of dragonflies: larva, exuvia, and adult. Using microwave plasma atomic emission spectrometry (MP-AES), we analysed the concentrations of Al, Ba, Cr, Cu, Fe, Mn, Pb, Sr and Zn. We found that the trace element contents of exuviae are a good proxy of the trace element contents of both the larvae and the adults. We conclude that exuvia is useful for assessing the environmental health of aquatic ecosystems. It is an environmentally friendly method and it can be used even in the case of protected dragonfly species.

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Sultana, N., N. Nawshin, H. Muktadir, MAH Chowdhury, and MA Baten. "Effects of Industrial Wastewater on the Yield and Trace Element Contents of Red amaranth." Journal of Environmental Science and Natural Resources 9, no. 2 (April 14, 2017): 27–30. http://dx.doi.org/10.3329/jesnr.v9i2.32147.

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Assessment the effect of industrial wastewater on the yield and trace element contents of red amaranth was carried out by this study. Thirty wastewater samples were collected from five major environment-polluting industries namely pharmaceuticals, dyeing, leather, food, and plastic industries at three different locations. Atomic Absorption Spectrophotometer was used for analyzing the trace elements in the wastewater-irrigated samples of red amaranth. Higher mean concentrations of Pb, Cd, Ni, Cr, As, Zn, and Cu in red amaranth were 0.97, 0.20, 1.23, 52.72, 0.52, 0.85, and 2.62 ?g g-1. The percentage of yield reduction in red amaranth were 11.06, 12.73, 14.07, 3.46, 7.82 % for T2, T3, T4, T5 and T6 respectively compared to distilled water control (T1). The results concludes that the wastewater samples of pharmaceuticals, dyeing, leather and plastic industries were more polluted than the wastewater of food industries. Vegetables grown in industrial areas contain trace elements viz. Cr, Ni and Cu which would be health hazardous for consumer.J. Environ. Sci. & Natural Resources, 9(2): 27-30 2016

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Mandret, G., P. Legier, F. Lanot, and G. Aumont. "Macro-mineral and trace-element contents of forages in Réunion island." Annales de Zootechnie 43, Suppl. 1 (1994): 29s. http://dx.doi.org/10.1051/animres:19940535.

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DeVito, Matthew S., Lawrence W. Rosendale, and Vincent B. Conrad. "Comparison of trace element contents of raw and clean commercial coals." Fuel Processing Technology 39, no. 1-3 (August 1994): 87–106. http://dx.doi.org/10.1016/0378-3820(94)90174-0.

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Saracoglu, Sibel, Mustafa Tuzen, and Mustafa Soylak. "Evaluation of trace element contents of dried apricot samples from Turkey." Journal of Hazardous Materials 167, no. 1-3 (August 15, 2009): 647–52. http://dx.doi.org/10.1016/j.jhazmat.2009.01.011.

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Tuzen, Mustafa, and Mustafa Soylak. "Evaluation of trace element contents in canned foods marketed from Turkey." Food Chemistry 102, no. 4 (January 2007): 1089–95. http://dx.doi.org/10.1016/j.foodchem.2006.06.048.

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Vácha, R., M. Sáňka, O. Sáňka, J. Skála, and J. Čechmánková. "The Fluvisol and sediment trace element contamination level as related to their geogenic and anthropogenic source ." Plant, Soil and Environment 59, No. 3 (January 19, 2013): 136–42. http://dx.doi.org/10.17221/723/2012-pse.

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The upper values of the extractability of trace elements (As, Be, Cd, Co, Cr, Cu, Ni, Pb and Zn) in 2 mol/L HNO<sub>3</sub> and 0.025 mol/L ethylenediaminetetraacetic acid (EDTA) (compared with their pseudototal content in aqua regia) for determination of prevailing anthropogenic and geogenic soil load were proposed and compared with the results of the other 30 Fluvisol samples collected from the Labe fluvial zone. The increased geogenic load of Fluvisols was confirmed in the case of Be and As in some localities where low extractability with increased pseudototal contents were detected as opposed to the other elements when their increased pseudototal contents were followed by their increased extractability. The maps of probability of increased geogenic soil load in the area of the Czech Republic based on the comparison of geological substrates and trace element load were constructed. The combination of proposed elements extractability values for geogenic load together with developed maps is a suitable tool for the definition of prevailing Fluvisol or sediment load on some localities in the whole area of the Czech Republic. The results can be also a useful tool in the decision making processes regarding dredged sediment application on agricultural soil (support tool for legislative norms, Direction No. 257/2009 Sb.).

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Larimer, John W., and Ermanno R. Rambaldi. "The Trace Element Chemistry of the Metal in IAB Iron Meteorites." Zeitschrift für Naturforschung A 44, no. 10 (October 1, 1989): 968–78. http://dx.doi.org/10.1515/zna-1989-1009.

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Abstract Metal grains from a silicate inclusion in Landes, a group IAB iron-meteorite, were separated and analyzed via IN A A for 14 siderophile elements. The same 14 elements were determined in matrix metal from Landes, 5 other IAB meteorites and three anomalous iron meteorites. Compared to the other samples and to chondritic metal, the inclusion metal is enriched in siderophile elements. In chondritic metal, the siderophile element contents are higher when Fe0 is oxidized to FeO. Silicates in IAB inclusions contain little FeO, yet the metal is as rich in siderophile elements as the most oxidized chondrites.Evidently the IAB body contained its full cosmic complement of S resulting in an FeS content ~5 x that of ordinary chondrites. This explains the composition of the metal since sulfurization, like oxidation, reduces the available Fe0. IAB meteorites contain their full cosmic complement of other moderately volatile elements, which implies an equally high S content. A high S content significantly affects the melting and freezing of FeNi-metal. About 85% of the metal melts at the Fe-FeS eutectic (~960 °C), and all of the metal is molten at ~1050°C. During cooling, ~85% of the metal crystallizes with a Ni content of 6±1% between 1050°c and 960°C. Besides a small depletion in elements with low melting points or chalcophile tendencies this metal is little fractionated. Bellow 960 °C, the Ni content of the metal increases until the melt is exhausted. This Ni-rich metal also becomes progressively depleted in refractory elements and enriched in volatile elements. The crystallization process thus yields products that mimic the abundance and composition of group IAB meteorites.

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Liu, Ling, Shi Xing Zhang, and Yun Wang. "Birch Carbonization Surface Micrograph and Element Analyses." Advanced Materials Research 228-229 (April 2011): 315–20. http://dx.doi.org/10.4028/www.scientific.net/amr.228-229.315.

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There are close relationships between the surface micrograph and element contents of birch and its heating-up temperature. By using the scanning electron microscope (SEM) and the X-ray energy dispersive spectrometer (EDS), the surface micrograph and element contents of birch carbonizations prepared in the simulating fires with different heating-up temperatures were observed and compared. The results show that as the heating-up temperature rises, the surfaces of tracheids gradually become smoother, and the cross sections of tracheids change from circular or ovate shape to polygon. The external films of tracheid fibers are damaged and bordered pits are exposed gradually with the increasing of heating-up temperature. At high temperature, bordered pits change from flat eye-like pores to circular pits, at the same time, the carbon content increases from 52.46% to 90.96%, and the oxygen content decreases from 47.34% to 8.31%, while the potassium and calcium content increase. Thus, the study of connecting wood surface micrographs and element contents with heating-up temperature is useful in fire trace and evidence identification, and the result is meaningful to fire investigation.

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Brasanac-Vukanovic, Snezana, Vanja Tadic, Nada Blagojevic, Vesna Vukasinovic-Pesic, Sladjana Djurdjic, Milica Stankovic, and Jelena Mutic. "Element accumulation capacity of Vaccinium myrtillus from Montenegro: Comparison of element contents in water and ethanol extracts of bilberry plant parts." Archives of Biological Sciences 71, no. 1 (2019): 145–57. http://dx.doi.org/10.2298/abs181004056b.

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Bilberry (Vaccinium myrtillus L., Ericaceae) is a rich source of different mineral elements that are important as essential trace elements, or that can be potentially toxic, depending on their concentration. The contents of sixteen elements: the major (Al, Ca, Fe, K and Mg) and trace elements (As, Ba, Cd, Co, Cu, Cr, Mn, Ni, Pb, Sr and Zn) in roots, stems, leaves and fruits of bilberry and the corresponding soil substrate were determined in order to investigate element mobility and availability in soil. Soil was subjected to sequential extraction procedure as proposed by the Community Bureau of Reference in order to fractionate acid-soluble/exchangeable, reducible, oxidizable and residual fractions. Analysis of water and ethanol extracts of bilberry aerial parts revealed a significant transfer of elements during the extraction procedure, with corresponding extraction coefficient values of up to 95.12%. Results showed that bilberry fruits could serve as a good dietary source of essential elements for humans, especially Mn and Cu.

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Savinov, S. S., N. A. Riadchikova, T. M. Pikalova, and A. I. Drobyshev. "Determination of the trace element composition of human hair." Medical academic journal 20, no. 3 (September 15, 2020): 23–32. http://dx.doi.org/10.17816/maj43172.

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Hair is one of the promising non-invasive samples for monitoring the trace element composition of the human body. But it is necessary to take into account the individual and subpopulation characteristics of sample donors. Inthis work, we experimentally studied the features of the analysis of human hair samples for the determination of trace elements by arc atomic emission spectrometry using a dry residue after acid mineralization. Validation was carried out by comparative analysis by the method used, as well as by atomic emission spectrometry with inductively coupled plasma. It has been shown that the concentrations of Al, B, Ca, Cu, Fe, Mg, Mn, P, Pb, Zn in a set of 50samples from different donors obey the lognormal law, and therefore, the geometric mean (or median) is preferable as mean value. The content of Ca and Mg is higher in the female hair, while the content of Pb is higher in the male hair. Theconcentrations of Fe, Mn, and Pb are slightly higher in the hair of smokers than in non-smokers, but this difference is not statistically significant (probably due to the small sample size). Although the concentrations of several elements (including Mg, Mn, and P) differ in the hair of donors living in different regions of Russia, we failed to establish asignificant difference of this factor. Positive correlations were found between the contents of some elements, in particular, Mg/Ca, Al/Fe, Al/P, Cu/Fe, Cu/P, Fe/P, weaker relationships were found for Al/Cu, Ca/Mn, Cu/Pb, Mn/P.

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Flis, Marian, Eugeniusz R. Grela, Grażyna Żukowska, and Dariusz Gugała. "Nutritional composition and heavy metal content in breast and thigh muscles of wild and intensively reared common pheasants (Phasianus colchicus)." Journal of Veterinary Research 64, no. 2 (April 21, 2020): 305–12. http://dx.doi.org/10.2478/jvetres-2020-0028.

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AbstractIntroductionDiffering conditions in captive breeding and in the wild have impact on the mineral profile of the pheasant carcass and its heavy metal contents. This may be an indicator of environmental contamination. The study evaluated the nutritional composition and selected macro- and trace element contents (heavy metals in particular) in usable sections of pheasant breast and thigh muscles originating from captive breeding and wild birds.Material and MethodsThe tests were performed on the breast and thigh muscles of 20 wild and 20 farm bred birds from around Lublin, Poland, with equal sex representation. The nutrient and lead, cadmium, chromium, and nickel contents were determined using inductively-coupled plasma atomic emission spectroscopy.ResultsThe farmed pheasants had a higher proportion of breast muscle. The thigh muscles of all birds had a higher fat content than the breast muscles (5.1 g vs. 3.4 g per kg of natural weight). The macroelement level depended on the muscle type and bird origin. The trace element content also did and gender dependence was also evident. The wild birds contained more cadmium in the breast muscles and lead in both muscles than the farm-raised ones.ConclusionThe high quality and usefulness of wild and farmed pheasant meat is confirmed. It has advantageous macro- and trace element contents and permissible heavy metal contents except for lead in wild birds. The heavy metal level can be a bioindicator of their environmental occurrence. In wild birds, the lead level may also reflect birdshot remnants.

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Sandier, A., L. Halicz, and I. B. Brenner. "Distribution of Trace Elements in the Filterable and Acid Extractable Fractions of Waters of the Northern Jordan River." Water Science and Technology 27, no. 7-8 (April 1, 1993): 405–12. http://dx.doi.org/10.2166/wst.1993.0576.

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Waters of the northern watershed of Lake Kinneret, sampled during the period 1985-1987, were analysed for their acid extractable and filterable major and trace element contents as part of an on-going research project. Water exploitation and reuse, mainly in the Hula Basin, resulted in an increase in concentration of trace elements in the different drainage canals. The distribution of high, exceptional values appears to be random, and cannot be clearly related to time-environmental processes. The highest concentrations of some major and trace elements were consistently recorded in the canal that drains peat soils. Nevertheless, the southern reaches of the Northern Jordan River were only slightly higher in concentration than the pristine sources. This implies that parts of the metal load were eliminated by poorly defined processes. The acid extractable concentrations were usually twice those of the filterable fraction, with the exception of interrelated Fe and AI, which were highly enriched in the suspended phase. The low levels of the element contents in the highly dynamic system prohibited the proposal of a model explaining the observed variations. The trace metal concentrations, generally below the regulation values, were similar to those reported for unpolluted world-wide streams.

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Du, Qing, Yanguo Cai, Zhi Chen, Dongliang Wei, Yande Cao, Ying Chen, Shulin Yu, Qianqian Zhao, Jiang Wu, and Mingdi Liu. "Determination of Trace Elements in Corydalis conspersa and Corydalis linarioides by ICP-AES." Journal of Chemistry 2020 (October 24, 2020): 1–11. http://dx.doi.org/10.1155/2020/6567015.

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In order to establish a method for the simultaneous determination of trace elements Al, As, B, Ca, Cr, Cu, Fe, K, Li, Mg, Mn, Na, Ni, P, Si, Ti, and Zn in Corydalis conspersa and Corydalis linarioides, we collected the samples from different areas and treated with acid hydrolysis into tissues to be detected by the way of inductively coupled plasma-atomic emission spectrometry compared with the standard element control method. We can know that the contents of Al, Ca, Fe, K, Mg, Na, and P in roots, stems, leaves, and flowers were higher. The contents of elements in different tissues and areas were as follows: flower > leaf > stem > root, Zeku County > Guide County > Nangqian County > Henan County. Among them, the contents of each element in the flowers of Maixiu Forest Farm were higher, while the contents of B, Cr, Cu, Li, Mn, Ni, Si, Ti, and Zn in roots, stems, and leaves of other areas were lower. The contents of heavy metal elements complied with the limit degree. A 3-factor model was obtained by principal component analysis which could clarify 82.46% of the total experimental data; the factors of Al, Fe, Mg, Na, P, Ca, Cu, Si, and Zn had great influence on the efficacy of 21 kinds of medicinal materials. Cluster analysis classified the samples into three categories; the flowers of Corydalis conspersa and stems of Corydalis linarioides from different collection areas are clustered containing high contents of type 1 and 3 characteristic components; the roots, stems, and leaves from other collection areas are clustered with low contents of 1 and 2 characteristic components. It can be used for the determination of trace elements in Corydalis conspersa and Corydalis linarioides to provide effective basis for revealing the function of trace elements with plant growth.

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Journal articles on the topic 'Trace element contents'

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