31303240赛默飞BTO X-145 9MM 50个/包

ChIP protocol for X. laevis Lens1/FoxE3 enhancer

(9)  Sonicate the homogenate on ice (10 sec. pulse + 50 sec. break x 6 times, 20% amplitude with a small tip of Branson sonifier (Fisher Dismembranator Model 500)). This step releases chromatin DNA from cells without solubilizing yolk proteins that make

新型光机结合的二维共焦生物芯片扫描仪设计

扫描仪中，都采用机械式的二维X，Y线性扫描技术实现，即X，Y方向都采用直线驱动器和直线导轨实现往复运动。此类装置，由于驱动系统的频率限制，驱动器的扫描惯性大，使得扫描效率低，分析时间相当长；并且往复行程长，对直线导轨的精度要求相当高。二、光机结合的二维扫描系统为同样实现生物芯片的二维扫描，我们的实验装置设计如图2，采用了振镜和大数值孔径的远心f-è物镜相结合实现X方向扫描，Y方向的运动仍采用直线驱动器和直线导轨实现。 系统中，对于f-è物镜，满足x＝2fè（è为振镜的摆动角度，f为物镜焦距）的线性

Protocol for Trichloroacetic Acid (TCA) Precipitation

and Equipment Required Borosilicate tubes, 12 x 75 mm (e.g., Fisher Cat #14-961-26) 10% TCA (e.g., Acros Cat # 42145-5000; make a 10% (w/v) solution in water) Warning: TCA is caustic! Carrier nucleic acid, 1 mg/ml (e.g., sheared fish