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词汇 trace element
释义

Definition of trace element in English:

trace element

noun
  • 1A chemical element present only in minute amounts in a particular sample or environment.

    (特定标本、环境中的)痕量元素

    Example sentencesExamples
    • It was later identified that molybdenum was the most abundant trace element present in the soluble and insoluble extractions of the wood-ash.
    • The mystery was solved in 1939 when fluoride was identified as a trace element in local drinking water.
    • They also suggest that, once it has been harvested, the plant could be transported to sites with very low levels of boron, helping to add the trace element to the soil in regions where it is boron deficient.
    • The trace element (of thiomersal) is so small we are not concerned about it.
    • In fact, every trace element present in a crystal's mineral makeup adds in some way to its healing effects.
    • Not only must the occurrence of a specific trace element be determined, but also its concentration in order to compose the particular chemical map.
    • The trace element and isotopic characteristics of these dykes imply derivation from an asthenospheric mantle source, which is likely to occur only as a result of regional lithospheric extension.
    • Copper is a constituent of fungicides as well as a trace element in fertilizers.
    • IUPAC has published the results of studies on trace elements in the environment, pesticides in water, and a glossary of atmospheric weather terms.
    • Also, aragonite tends to have much higher amounts of strontium as a trace element in the calcium carbonate.
    • DU is the trace element left over when uranium is enriched; most of the highly radioactive types of uranium are removed for use as nuclear fuel or nuclear weapons.
    • And the fire marshal's conclusion about the likely cause of the fire - a faulty heat trace element attached to a utilidor line - is unremarkable.
    1. 1.1 A chemical element required only in minute amounts by living organisms for normal growth.
      (特定标本、环境中的)痕量元素
      Example sentencesExamples
      • Zinc, a trace element that influences cell metabolism through a variety of mechanisms, appears to play an integral role in maintaining normal ocular function.
      • It's an essential trace element that helps keep the immune system humming and free radicals under control.
      • A review study in 2001 reported that selenium, an essential trace element, is necessary for the functioning of an enzyme that protects against oxidative damage to cell structures.
      • Other factors that affect response to organic trace minerals may include the particular trace element, binding affinity between the trace element and chelating agent, and the dietary concentration of the trace element.
      • Selenium is a trace element that is indispensable for mammals, and it is present in each organ and body fluid.
      • It has long been suspected that selenium, a trace element found in tiny quantities in foods such as grains, fish and liver, is important in human health, but the exact amounts needed were unknown.
      • However, what are known as micronutrients - vitamins and trace elements - can poison if taken in excessive quantities.
      • Selenium is a trace element that has antioxidant properties.
      • Other ingredients include enzymes, amino acids, trace elements and vitamins.
      • Selenium is a trace element and is found as a component of several prokaryotic and eukaryotic enzymes that are involved in redox reactions.
      • Selenium is a trace element found in meats and grains, but dietary intake can vary by geographic area because of different concentrations of the element in the soil.
      • Selenium is an essential dietary trace element required for mammals including humans to light against various diseases including cancer.
      • One earlier study had tested whether selenium, a trace element, could help prevent non-melanoma skin cancer.
      • Molybdenum is a trace element found in the soil and is required for growth of most biological organisms including plants and animals.
      • It crops up in milk of magnesia, and as Epsom salts (magnesium salts are catastrophically laxative…), but it is also an essential trace element, required for the normal function of virtually every organ.
      • A diet high in sugar can deplete your body's supply of chromium, a trace element responsible for helping insulin transport glucose into cells and for aiding the cellular uptake of amino acids into your system.
      • This trace element is a known antioxidant.
      • Millions of people are obsessed with chocolate for its softness and sweetness, but few know that chocolate is also rich in one trace element - copper.
      • Now cultivated in laboratories, HSOs are grown in a substrate of nutrient-rich superfoods containing naturally occurring vitamins, minerals, trace elements, live enzymes, and proteins.
      • Cysteine can be given orally to increase GSH or to chelate trace elements in the gut, thereby decreasing absorption of both cysteine and the trace element.

Definition of trace element in US English:

trace element

nountrās ˈeləmənttreɪs ˈɛləmənt
  • 1A chemical element present only in minute amounts in a particular sample or environment.

    (特定标本、环境中的)痕量元素

    Example sentencesExamples
    • IUPAC has published the results of studies on trace elements in the environment, pesticides in water, and a glossary of atmospheric weather terms.
    • The trace element (of thiomersal) is so small we are not concerned about it.
    • In fact, every trace element present in a crystal's mineral makeup adds in some way to its healing effects.
    • DU is the trace element left over when uranium is enriched; most of the highly radioactive types of uranium are removed for use as nuclear fuel or nuclear weapons.
    • They also suggest that, once it has been harvested, the plant could be transported to sites with very low levels of boron, helping to add the trace element to the soil in regions where it is boron deficient.
    • The trace element and isotopic characteristics of these dykes imply derivation from an asthenospheric mantle source, which is likely to occur only as a result of regional lithospheric extension.
    • Not only must the occurrence of a specific trace element be determined, but also its concentration in order to compose the particular chemical map.
    • And the fire marshal's conclusion about the likely cause of the fire - a faulty heat trace element attached to a utilidor line - is unremarkable.
    • Also, aragonite tends to have much higher amounts of strontium as a trace element in the calcium carbonate.
    • The mystery was solved in 1939 when fluoride was identified as a trace element in local drinking water.
    • It was later identified that molybdenum was the most abundant trace element present in the soluble and insoluble extractions of the wood-ash.
    • Copper is a constituent of fungicides as well as a trace element in fertilizers.
    1. 1.1 A chemical element required only in minute amounts by living organisms for normal growth.
      (特定标本、环境中的)痕量元素
      Example sentencesExamples
      • Molybdenum is a trace element found in the soil and is required for growth of most biological organisms including plants and animals.
      • Now cultivated in laboratories, HSOs are grown in a substrate of nutrient-rich superfoods containing naturally occurring vitamins, minerals, trace elements, live enzymes, and proteins.
      • Selenium is a trace element that has antioxidant properties.
      • This trace element is a known antioxidant.
      • Selenium is a trace element that is indispensable for mammals, and it is present in each organ and body fluid.
      • Other ingredients include enzymes, amino acids, trace elements and vitamins.
      • Selenium is a trace element found in meats and grains, but dietary intake can vary by geographic area because of different concentrations of the element in the soil.
      • Selenium is a trace element and is found as a component of several prokaryotic and eukaryotic enzymes that are involved in redox reactions.
      • However, what are known as micronutrients - vitamins and trace elements - can poison if taken in excessive quantities.
      • Zinc, a trace element that influences cell metabolism through a variety of mechanisms, appears to play an integral role in maintaining normal ocular function.
      • Other factors that affect response to organic trace minerals may include the particular trace element, binding affinity between the trace element and chelating agent, and the dietary concentration of the trace element.
      • Millions of people are obsessed with chocolate for its softness and sweetness, but few know that chocolate is also rich in one trace element - copper.
      • One earlier study had tested whether selenium, a trace element, could help prevent non-melanoma skin cancer.
      • Selenium is an essential dietary trace element required for mammals including humans to light against various diseases including cancer.
      • It crops up in milk of magnesia, and as Epsom salts (magnesium salts are catastrophically laxative…), but it is also an essential trace element, required for the normal function of virtually every organ.
      • Cysteine can be given orally to increase GSH or to chelate trace elements in the gut, thereby decreasing absorption of both cysteine and the trace element.
      • A diet high in sugar can deplete your body's supply of chromium, a trace element responsible for helping insulin transport glucose into cells and for aiding the cellular uptake of amino acids into your system.
      • A review study in 2001 reported that selenium, an essential trace element, is necessary for the functioning of an enzyme that protects against oxidative damage to cell structures.
      • It has long been suspected that selenium, a trace element found in tiny quantities in foods such as grains, fish and liver, is important in human health, but the exact amounts needed were unknown.
      • It's an essential trace element that helps keep the immune system humming and free radicals under control.
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