| 词汇 | arsenic |
| 释义 | arsenic noun[ U ] uk /ˈɑː.sən.ɪk/ us /ˈɑːr.sən.ɪk/(symbolAs) a chemical element that is very poisonous, often used to kill rats砷，砒霜 Chemical elements actinium alkali metal americium astatine berkelium brimstone bromine calcium fluorine germanium lithium manganese nickel plutonium quicksilver selenium silicon sodium sulphur transition metal All of Mary’s victims apparently died from stomach illnesses, but in fact this condition has very similar symptoms to the deadly poison arsenic. Arsenic could be used secretly and provided very little in the way of evidence. By the 8th century CE, Arabian doctors had found ways to produce arsenic so that it was clear and had little smell, making it almost unnoticeable and very popular. In the 19th century, arsenic was freely available and was often used as a cleaning product. People said that Lucrezia Borgia kept arsenic in a special ring. Substances like arsenic were commonly found in rat poison, cosmetics that women used, and cleaning products. With her back turned, she opened the ring and secretly poured the arsenic into her victims’ drinks. arsenic | American Dictionaryarsenic noun[ U ] us/ˈɑr·sə·nɪk/ a very poisonous substance, used to kill rats (= animals like mice, but larger) and harmful insects Examples of arsenicarsenic Results were obtained for arsenic, cadmium, chromium, cobalt, copper, lead, nickel, and zinc. It gave off great clouds of toxic smoke, heavy with sulphurous acid gas and tinged with arsenic. The heavy metals in the ash included arsenic, cadmium, chromium, manganese, nickel, cobalt, copper, zinc, and lead. As a consequence, the produced white arsenic a#ects red copper by turning it into the white alloy of copper-arsenic. There were burns that contained wood that did not have high arsenic, chromium, and copper readings (burns 11, 12, 14, 15, and 19). Second, elemental arsenic does not combust with copper in alloying as in the case of arsenic sulfide. The highest readings of arsenic, chromium, and copper all occurred when wood was present. Further correlations existed between heavy metals in the ash for: arsenic and chromium; and arsenic and manganese. When entered as dummies, arsenic levels increase slightly and then decrease with democratic freedoms. When freedoms are entered in linear form, an increase in democratic freedoms reduces arsenic concentrations. The executive orders created national monuments, for example, while the regulations ranged from workplace rules to limits on arsenic in drinking water. Oxidation of pyrites releases strong sulphuric acid resulting in the dissolution of arsenic-bearing minerals. This is of particular interest since arsenic is known to affect signal transduction pathways at nontoxic levels. The weak link between copper and both arsenic and chromium suggests that copper is also present in other sources of waste. 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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