| 词汇 | barium-sulfate |
| 释义 | barium sulfate noun[ U ] US(UKbarium sulphate)us/ˌber.i.əm ˈsʌl.feɪt/uk /ˌbeə.ri.əm ˈsʌl.feɪt/ a chemical used in industry and medicine. In medicine, barium sulfate is swallowed by a person just before an X-ray is taken of their stomach and bowels, so that these organs can be seen clearly. Chemicals, chemical compounds & gases acetic acid acetone acrolein acrylamide activated charcoal adenine agglomerate benzene fluorocarbon H2O HCFC HFC hyaluronic acid hydrochloric acid hydrochlorofluorocarbon limescale metho meths tartaric acid tear gas Examples of barium sulfatebarium sulfate The open circles show the chromaticity of light reflected from a plaque of bariumsulfate. Liquid suspensions of bariumsulfate are non-toxic, apart from a small risk of producing a disturbance in bowel function for 48 hours after ingestion. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Bariumsulfate is used in some applications too. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. An exception is the administration of magnesium sulfate in barium chloride poisoning, where sulfate binds to barium to form insoluble bariumsulfate. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The brightening occurs because bariumsulfate is in the form of a fine precipitate that scatters light back through the silver image layer. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Shortly after, the process was improved; barium was removed chemically, by double precipitation from a solution as bariumsulfate. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The paste contains carbon black, "blanc fixe" (bariumsulfate) and lignosulfonate. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. In colorimetry bariumsulfate is used as a near-perfect diffuser when measuring light sources. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The enema may contain bariumsulfate powder, or a water-soluble contrast agent. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Different consistencies of liquid and food mixed with bariumsulfate are fed to the patient by spoon, cup or syringe, and x-rayed using videofluoroscopy. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Bariumsulfate is one of the most insoluble salts of sulfate. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. In the laboratory bariumsulfate is generated by combining solutions of barium ions and sulfate salts. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. A supported palladium catalyst on bariumsulfate, and doped (poisoned) with quinoline hydrogenates alkynes into "cis" -alkenes. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. As the bariumsulfate doesn't dissolve, this type of contrast agent is an opaque white mixture. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Fouling of membranes in reverse osmosis systems can occur due to differential solubility of bariumsulfate in solutions of different ionic strength. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. See all examples of barium sulfate 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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