混浊介质角域成像

玉米浆干粉培养基灭菌之后，培养基混浊是正常现象吗？

Angular Domain Imaging (ADI) employs an angular filter array to accept photons within a small acceptance anglealong the axis of an aligned laser light source and preferentially reject scattered light. Simulations show that theaccepted photons travel the shortest paths between source and detector and are therefore the earliest to arrive. Wefabricated angular filter arrays using silicon bulk micromachining and found that an array of 60 μ m square shape microtunnels1 cm in length accepted photons within 0.48 degree of axis of the micro-tunnels. This small acceptance anglerejected most of the scattered light and sub-millimeter resolution targets could be resolved in a few centimeters of turbidmedium with at least six times reduced mean free path. ADI through media with higher scattering coefficients was notachievable due to unwanted acceptance of late arriving scattered photons. To reject the late arriving photons, we addedtime-domain filtration and linear polarization to ADI. The implementation of a time-gated camera, a 780 nm femtosecondpulsed laser, and linear polarization to our ADI system resulted in improved image contrast. The use of ADIwith time-gating (gate width 250 ps) and linear polarization enabled visualization of sub-millimeter absorbing objectswith approximately eight times higher image contrast compared to ADI in a scattering medium equivalent to six timesreduced mean free path.

由于聚氧乙烯醚上的氧原子能与水以氢键结合，增大了而表面活性剂的溶解度。当温度上升时，分子剧烈运动，结合的水分子逐渐脱离。同时，溶液中的胶束量增加，当温度升至某值时，发生相的分离，出现混浊。这种当水溶液温度升高 时，溶液由清洗透明变混浊实的温度即为浊点。浊点是非离子表面活性剂(NS) 均匀胶束溶液发生相分离的温度，是其非常重要的物理参数。