| 词汇 | antioxidant |
| 释义 | antioxidant noun[ C ] uk /ˌæn.tiˈɒk.sɪ.dənt/ us /ˌæn.t̬iˈɑːk.sɪ.dənt/ a substance that slows down the rate at which something decays because of oxidization抗氧化剂，阻氧化剂，防老（化）剂 Chemistry: types of chemical acid salt aerogel albumin alkali metal alkaline alkaloid carbohydrate coolant homologous series inorganic isopropanol ketone lectin melamine monosaccharide mothball propellant saline soluble weak base antioxidant | American Dictionaryantioxidant noun[ C ] us/ˌænt·iˈɑks·ɪ·dənt, ˌæn·tɑɪ-/ a chemical substance that prevents or slows down the damage that oxygen does to organisms or to food: Vitamin C's antioxidant activity may help boost immune function and may make some people feel better. She takes the vitamins, minerals, antioxidants, and folic acid in women's multivitamins. Examples of antioxidantantioxidant It may possibly be the quantity of fiber and not the antioxidants in vegetables that has protective effects. There are no confirmed findings demonstrating the protective effects of a particular antioxidant. Additionally, in desiccation-sensitive seeds, protective antioxidant systems may also fail. Percentage values for germination and antioxidant activity were arcsinetransformed prior to analysis (untransformed data appear in all tables and figures). The antioxidant activity of seeds prior to storage varied between species. Antioxidant enzymes in intramolluscan schistosomes recombinant fusion protein vaccine against schistosomiasis protecting against immunopathology and infection. These observations indicate that schistosomes express elevated levels of antioxidant enzymes in interaction with haemocytes from susceptible snail hosts in which they survive. Changes in antioxidant compounds or enzymes during seed development should also be regarded as a prerequisite for obtaining a vigorous seed. The pecking order of free radicals and antioxidants: lipid peroxidation, a-tocopherol and ascorbate. Indirect evidence of increased free radical activity (oxidative stress) may be obtained by measurement of antioxidant concentrations in all tissue and body fluids. Its further decrease may be due to the intensive use of antioxidants in the period of high infection level and greatest production of free radicals. At low concentration exogenous hydrogen peroxide induced an adaptive response of cells by promotion of synthesis of antioxidant enzymes and heat shock proteins. The antioxidant glutathione is of the essence for all life forms discussed here. There has been increasing interest in clinical trials of antioxidants toward prevention or treatment of preeclampsia. One of the studies reported signs of improved immunological defense and a lower number of infection days among those who received antioxidant supplements. 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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