The SPAD reading may be used in estimating total nitrogen content (N) in leaves and even in estimating grape yield in grapevines. The objective of this study wa
C 君是坐在我后面的男孩,此人整天乐呵呵,自命为“快乐王子”。似乎快乐始终包围着他,进而感染了一大群。不过他也有难堪的时候,一日上课时,C 君正与同桌大侃,不巧被老师叫到
Nitrogen is an effective material for improving the crop production. There is a big concern about rising chemical nitrogen usage as fertilizer in soil, because
我国有着悠久的纺织历史．在人们的日常生活中，许多词语都来源于纺织品。锦是有彩色花纹的丝织品，《释名》：“锦．金也。作之用功重．其价如金。故字从金、帛。”后“锦”多用于美好的
2013年,微电影第一次纳入第五届全国大学生广告艺术大赛评审系统,从获奖作品个案来看,其艺术特色可圈可点。但通过文本、技术、语境层面的分析发现：商业属性的介入使得微电影
Leaf traits, structure and water status of Conocarpus lancifolius, a Combretaceae were investigated under semi-arid conditions. The leaf traits examined include
Two triterpenoid saponins, 6, 7, together with five known compounds were isolated from the roots of Arachis hypogea L. collected in Vietnam. Their structures we
风险投资是指同技术创新相联系的高技术产业创业投资。发展高技术产业对于一个国家的经济发展和生产力提高具有重要意义。