| 词汇 | example_english_trace-element |
| 释义 | Examples of trace elementThese examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. Calculation of simultaneous isotopic and traceelement variations during water-rock interaction with applications to carbonate diagenesis. The heat stable factor which effects these increases in growth could be a specific ion or a traceelement. Major and traceelement abundances were measured on fused discs and pressed pellets, respectively. We use traceelement geochemistry to constrain the protolith source of the amphibolites. The effect of crustal contamination on lava compositions is most readily apparent in major and traceelement data. An amelioration of body weight gain, reduction of mortality and restoration of traceelement levels were estimated in infected chickens. Based on petrographical investigations, 44 representative samples were selected for major and traceelement analyses. The traceelement variation within groups is very small. Copper is an essential traceelement but most diets contain a little more copper than is needed. Identification of petrogenetic processes using covariance plots of traceelement data. Appendices provide clearly tabulated data on major and traceelement analyses for all the samples discussed in these chapters. It exhibits a wide traceelement compositional range. We therefore suggest that the analysed part of the gabbroic pegmatite represents a 'cumulate' from which an incompatible traceelement-enriched melt has escaped. Representative basalt samples were selected for major and traceelement analysis, excluding those with obvious alteration. The changes in major and traceelement composition of the samples are very complex and seem not to change systematically. Therefore, we attempt here to constrain the source characteristics of the magmas by traceelement ratio diagrams. The origin of ocean island basalt end-member composition: traceelement and isotopic constraints. This is further confirmed by using other traceelement ratios. The application of basic salts of transitional elements is not well investigated for the treatment of host traceelement imbalances associated with infections by endoparasites. An approach to traceelement modeling using a simple igneous system. Thus, isotope and traceelement evidence confirms that the primary magma was not enriched. The origin of ocean island basalt end-member compositions: traceelement and isotopic constraints. This traceelement has been shown to be of great importance against infections in the newborn; lack of it disturbs future zinc metabolism and may lead to stunted growth. The optical emission from the laser-produced plasma from the liquid target having manganese as a traceelement was recorded in the absence and the presence of the magnetic field. A review of experimental studies of crystal/liquid traceelement partitioning. Alternatively, the variations in traceelement abundance and luminescence may be simply coincidental and crystal lattice defects related to growth rate may be playing an important role. The trachytes could have been derived from the partial melting at depth of mafic material which shares with the alkali basalts similar traceelement and isotopic compositions. Judging from the hypersolvus nature of this complex, its bulk composition, and its traceelement patterns, we suggest that the melt has undergone some degree of internal differentiation. Because iron is an essential traceelement in virtually all living organisms, a wide variety of acquisition and storage mechanisms have evolved to meet iron demand. If they have the ear of a friendly or ambitious mass-spectrometrist, and an intriguing project, major and traceelement data are added to by stable or radiogenic isotopes. Papers record fascinating links using plankton groups as proxies for climatic conditions, using traceelement proxies for the oxygen minimum zone, and using nitrogen isotopes as a proxy for upwelling. The application of traceelement data to problems in petrology. Selenium is an essential traceelement which is particularly important in protecting the body against oxidative damage of the cells. From the Hansard archive Example from the Hansard archive. Contains Parliamentary information licensed under the Open Parliament Licence v3.0 There may be a question of traceelement deficiency in what badgers or cattle eat. From the Hansard archive Example from the Hansard archive. Contains Parliamentary information licensed under the Open Parliament Licence v3.0 It has often been said that racial differences act like a traceelement in the body politic, exposing all the weak places. From the Hansard archive Example from the Hansard archive. Contains Parliamentary information licensed under the Open Parliament Licence v3.0 Nickel features as a traceelement in coal, with a typical concentration of 20 ppm covering a range from 0.5 to 50 ppm, and is also present in fuel oil. From the Hansard archive Example from the Hansard archive. Contains Parliamentary information licensed under the Open Parliament Licence v3.0 Selenium is an occurring semimetallic traceelement that occurs naturally in some soils and minute amounts are necessary for animal life. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. These findings suggest that, with the exception of vertebrates, aquatic life supports selenium utilization, whereas terrestrial habitats lead to reduced use of this traceelement. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. This interpretation is supported by additional traceelement data, but is also the subject of debate. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The traceelement copper had been found promoting tumor growth. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Iron is a traceelement necessary for photosynthesis in all plants. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Arsenic can be found naturally in the environment and also be an essential traceelement for some animals. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Iodine is an essential traceelement, necessary primarily for the synthesis of thyroid hormones. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. In humans, selenium is a traceelement nutrient that functions as cofactor for glutathione peroxidases and certain forms of thioredoxin reductase. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Research in traceelement nutrition has led to the development of more bioavailable organic minerals, including trace minerals derived from chelates. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Electron microprobe analyses can detect both bulk composition and traceelement composition. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The two varieties are distinguished by minor and traceelement compositions. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. In geochemistry, a traceelement is a chemical element whose concentration is less than 1000 ppm or 0.1% of a rock's composition. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. This instrument can allow for greater chemical resolution but can only measure one traceelement at a time. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. It is found in humans, certainly as a traceelement, but there is ongoing debate over its significance in human nutrition. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Since this is a post-translational modification that occurs in all animals, bromine is therefore an essential traceelement for humans. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. These problems are compounded by the difficulty in provenancing tin objects and ores to their geological deposits using isotopic or traceelement analyses. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Selenium is a traceelement involved in proteins that are antioxidants. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Later, tests show that silicon is that substance; in humans it is normally just a traceelement. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Zinc is an essential traceelement, necessary for plants, animals, and microorganisms. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Boron is a traceelement in humans and is essential for some plants. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. It is a hard, brittle, bluish-white transition metal in the platinum group that is found as a traceelement in alloys, mostly in platinum ores. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. They can be used to reconstruct past climate by examining the stable isotope ratios and traceelement content of the shells (tests). From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. While not as reliable as traceelement analysis, and completely dependent on the experience of the researcher, visual sourcing has a number of advantages. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. For example, researchers can look at the traceelement composition of obsidian artifacts in order to fingerprint those artifacts. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. There are similarities in traceelement concentrations between primitive achondrites and chondrites. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. It is the workhouse of the laboratory and is used for traceelement analysis via accelerator mass spectroscopy. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Traceelement analysis of colourless glass showed these were made using sands from different sources and giving some support to the de-centralised production hypothesis. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Because boron is a traceelement, the majority of borate minerals occur only in one specific geologic environment: geologically active intermontane basins. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Variation in color is largely due to variation in traceelement composition. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. In 1992, traceelement studies of the strontium/calcium ratios in robust australopith fossils suggested the possibility of animal consumption, as they did in 1994 using stable carbon isotopic analysis. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Major and trace elements showed a diversity of composition, controlled by the mineralogy. Post-eruptive alteration led to complex changes in major and trace elements. Deviations are also present but these are within the analytical error of trace elements. The ratios between incompatible trace elements show no consistent trends. In biochemistry, a traceelement is a dietary mineral that is needed in very minute quantities for the proper growth, development, and physiology of the organism. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Analytical precision is better than 0.5 % for major elements and 5 % for trace elements. Apart from the major cell constituents such as carbon, nitrogen, phosphorus and sulphur, bacterial biomass requires minerals and trace elements. Some people consider trace elements or micro-nutrients to be more important in the nutrition of man than their organic micro-nutrient counterparts-the vitamins. The utility of mobile major and trace elements for comparisons and correlations of altered tephrostratigraphic markers is commonly restricted. These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. |
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