Oblique cutting is a working condition in fully mechanized mining whose function is making it possible for coal shearer to cut coal wall.Coal shearer often exhi
Coalification temperatures are often considered to be approximately 100-170 ℃ for bituminous coal and 170-275 ℃ for anthracite.However,our micropetrographic o
来源于细菌的EPSPS编码基因AM79 aro A可用于培育抗草甘膦转基因作物。实验室前期工作对AM79 aro A基因进行了人工改造合成,合成的基因命名为m AM79。本研究对实验室前期获得的转m AM79基因玉米材料进行了分子鉴定及草甘膦抗性分析。同时为了获得更多的具有不同插入位点的转基因事件,本研究将m AM79基因表达框插入到玉米Ds转座子元件中,构建了植物表达载体p3301-Zm Ds-