Effect of Compound Danshen Tablets on amino acid neurotransmitters in brain of Alzheimer‘s disease rats Relation of mineralizable N to organic N components Effects of Ammonium and Amio-acid Nitrogen Fertilization on Plant Growth and Carbon Metabolism of Sugar beets(Beta vulgaris L.) Effect of total alkaloids of Equisetum pratense on amino acid neurotransmitters and Ach of striatum in rat brain Effects of different nitrogen forms on rice seedlings under sterilized culture at high temperature