随着电子行业的飞速发展,对作为电子元器件基础的印制板的需求量及其加工精度的要求越来越高。紫外线曝光机是印制板制造工艺中的重要设备。传统曝光机的玻璃-迈拉晒架在生产过程中需要人工赶气,迈拉膜需要经常更换。由于冷却系统过于臃...随着电子行业的飞速发展,对作为电子元器件基础的印制板的需求量及其加工精度的要求越来越高。紫外线曝光机是印制板制造工艺中的重要设备。传统曝光机的玻璃-迈拉晒架在生产过程中需要人工赶气,迈拉膜需要经常更换。由于冷却系统过于臃肿,使得其生产成本高、效率低,已不能满足PC B 生产的需要。在实验基础上设计了双玻璃晒架曝光机,改进了其主要组成部分,包括晒架系统、光路系统、冷却系统以及电气和控制系统的整体设计。实验结果表明,散射光双玻璃晒架曝光机达到了总体设计要求。展开更多
Biomimetic scaffolds are appealing products for the repair of bone defects using tissue engineering strategies.In the present study,novel biomimetic composite scaffolds,with similar properties to natural bone,were pre...Biomimetic scaffolds are appealing products for the repair of bone defects using tissue engineering strategies.In the present study,novel biomimetic composite scaffolds,with similar properties to natural bone,were prepared,blended and cross-linked with bioactive glass,type I collagen and phosphatidylserine.When exposed to cell culture solution in the absence of a cellular source,the composite scaffolds form crystals with octahedral structure.These crystals are similar to the products derived from MC3T3-E1 cell mineralization within the composite scaffolds,with respect to both composition and morphology.Furthermore,crystals with octahedral structure were observed to develop into plate-like hydroxyapatite.The bio-mineralization behavior of the composite scaffolds is likely influenced by inorganic components.Finally,a rabbit tibia defect model shows that the highly bioactive properties of the investigated composites result in excellent bone repair.展开更多
文摘随着电子行业的飞速发展,对作为电子元器件基础的印制板的需求量及其加工精度的要求越来越高。紫外线曝光机是印制板制造工艺中的重要设备。传统曝光机的玻璃-迈拉晒架在生产过程中需要人工赶气,迈拉膜需要经常更换。由于冷却系统过于臃肿,使得其生产成本高、效率低,已不能满足PC B 生产的需要。在实验基础上设计了双玻璃晒架曝光机,改进了其主要组成部分,包括晒架系统、光路系统、冷却系统以及电气和控制系统的整体设计。实验结果表明,散射光双玻璃晒架曝光机达到了总体设计要求。
基金supported by the Science and Technology Plan Project of Fujian Department of Education,China (Grant No. JK2009021)
文摘Biomimetic scaffolds are appealing products for the repair of bone defects using tissue engineering strategies.In the present study,novel biomimetic composite scaffolds,with similar properties to natural bone,were prepared,blended and cross-linked with bioactive glass,type I collagen and phosphatidylserine.When exposed to cell culture solution in the absence of a cellular source,the composite scaffolds form crystals with octahedral structure.These crystals are similar to the products derived from MC3T3-E1 cell mineralization within the composite scaffolds,with respect to both composition and morphology.Furthermore,crystals with octahedral structure were observed to develop into plate-like hydroxyapatite.The bio-mineralization behavior of the composite scaffolds is likely influenced by inorganic components.Finally,a rabbit tibia defect model shows that the highly bioactive properties of the investigated composites result in excellent bone repair.
