alkali

英 [ˈælkəlaɪ]

美 [ˈælkəlaɪ]

n.  碱

复数：alkalis　

TOEFLGRE

BNC.13261 / COCA.28494

牛津词典

noun

• 碱
  a chemical substance that reacts with acids to form a salt and gives a solution with a pH of more than seven when it is dissolved in water

柯林斯词典

• 碱
  Analkaliis a substance with a pH value of more than 7. Alkalis form chemical salts when they are combined with acids.

英英释义

noun

• any of various water-soluble compounds capable of turning litmus blue and reacting with an acid to form a salt and water
  1. bases include oxides and hydroxides of metals and ammonia
  Synonym:base
• a mixture of soluble salts found in arid soils and some bodies of water

双语例句

• Properties: red powder, good heat resistance, good alkali resistance and penetration-proof.
  性能简介：红色粉末，具有良好的耐热性，耐碱性和耐渗化性。
• Limitedly resistant to strong acid, strong alkali, strong oxidizing solution and strong solvent.
  但对强酸、强碱、强氧化液和强溶剂忍耐度有限。
• Oat bran protein concentrate was prepared through alkali extraction and acid precipitation.
  采用碱提酸沉法制备了燕麦麸浓缩蛋白。
• The FTIR and chemical analyses indicated lowering of hemi-cellulose content by alkali treatment of the fibers.
  FTIR光谱分析和化学分析结果表明，经碱处理的纤维中半纤维素含量降低；
• And, in fact, this is the case for all the alkali metals.
  事实上，所有的碱金属都有这样的性质。
• During saponification, an alkali base such as sodium hydroxide reacts with a fat.
  在皂化反应过程中，碱或者是氢氧化钠和油脂发生反应。
• Alkali slag cement in which waterglass was chosen as an activator was studied.
  本文研究了使用水玻璃作激发剂的碱矿渣水泥。
• Viscose manufacturing process involves the reaction of cellulose with sodium hydroxide to form an alkali cellulose.
  粘胶的生产过程包括纤维素与氢氧化钠反应形成碱纤维素的过程。
• Cesium and organic alkali will occur with other similar reactions, but it's quite lively.
  铯和有机物也会发生同其他碱金属相类似的反应，但它比较活泼。
• Water, acrylonitrile and the galactomannan gum are added to a reactor with an alkali metal hydroxide.
  水、丙烯腈和半乳甘露聚糖胶，同碱金属氢氧化物在一起，加入到反应器中。