针对触摸屏监控系统不能满足大中型立体仓库对数据进行存储和处理的功能需求,在Visual Studio 2019集成开发环境中,采用C#语言开发一套立体仓库上位机控制系统。以多线程的方式实时读取库位信息;以S7-1200 PLC作为主控制器,设计产品的...针对触摸屏监控系统不能满足大中型立体仓库对数据进行存储和处理的功能需求,在Visual Studio 2019集成开发环境中,采用C#语言开发一套立体仓库上位机控制系统。以多线程的方式实时读取库位信息;以S7-1200 PLC作为主控制器,设计产品的自动入库和自动出库程序流程,采用SCL语言设计了库位先进先出的控制程序。C#和S7-1200 PLC之间采用S7通信的方式控制立体仓库的出入库操作和库位信息采集,3年的现场运行情况表明,整个系统能在上位机上对立体仓库进行手动控制和自动控制,能精确快速地进行入库出库操作,运行平稳,上位机上能正确实时显示库位信息,达到了预期的结果。展开更多
Age-related macular degeneration(AMD)is the leading cause of irreversible vision loss in older adults,with early-stage features including subretinal lipid deposits and progressing to retinal geographic atrophy and cho...Age-related macular degeneration(AMD)is the leading cause of irreversible vision loss in older adults,with early-stage features including subretinal lipid deposits and progressing to retinal geographic atrophy and choroidal neovascularization in advanced stages.The dysregulation of ocular lipid metabolism,oxidative stress,and inflammation are critical risk factors for AMD pathogenesis.7-ketocholesterol(7-KC),a hallmark of ocular lipid metabolism disorders,is a significant component of subretinal lipid deposits in AMD patients,exhibiting toxicity to retinal cells and exacerbating lipotoxic aging.This review elaborates on the biosynthesis and metabolism of 7-KC in the retina,investigates its detoxification mechanisms by examining its binding proteins,and summarizes recent progress on kinase signaling pathways induced by 7-KC through inflammatory cytokines and intracellular effectors.The aim is to pinpoint potential pharmacological targets,nutritional compounds,and synthetic molecules to explore the potential of targeting 7-KC for AMD treatment.展开更多
以邻卤代苯胺和水合氯醛、盐酸羟胺为原料,通过Sandmeyer异亚硝基乙酰替苯胺合成法制备得7-卤代靛红,再经硼氢化钠/三氟化硼乙醚体系还原制备得7-卤代吲哚。考察了酰胺化反应温度和反应时间、成环反应温度、还原体系种类及还原剂用量对...以邻卤代苯胺和水合氯醛、盐酸羟胺为原料,通过Sandmeyer异亚硝基乙酰替苯胺合成法制备得7-卤代靛红,再经硼氢化钠/三氟化硼乙醚体系还原制备得7-卤代吲哚。考察了酰胺化反应温度和反应时间、成环反应温度、还原体系种类及还原剂用量对反应收率的影响,所有产物结构均通过~1H NMR、^(13) C NMR和元素分析等进行了表征。结果表明,制备7-氟吲哚、7-溴吲哚、7-氯吲哚时,较佳的酰胺化反应温度和反应时间分别为回流10min、80℃4h和80℃3h,较佳的成环反应温度分别为80℃、85℃和80℃,较优的还原体系为硼氢化钠/三氟化硼乙醚体系,较优的还原剂用量为n(硼氢化钠)∶n(三氟化硼乙醚)∶n(7-卤代靛红)=3.0∶2.25∶1。该工艺具有成本低、反应条件温和、收率较高,操作简便等优点,适合批量制备7-卤代吲哚。展开更多
文摘针对触摸屏监控系统不能满足大中型立体仓库对数据进行存储和处理的功能需求,在Visual Studio 2019集成开发环境中,采用C#语言开发一套立体仓库上位机控制系统。以多线程的方式实时读取库位信息;以S7-1200 PLC作为主控制器,设计产品的自动入库和自动出库程序流程,采用SCL语言设计了库位先进先出的控制程序。C#和S7-1200 PLC之间采用S7通信的方式控制立体仓库的出入库操作和库位信息采集,3年的现场运行情况表明,整个系统能在上位机上对立体仓库进行手动控制和自动控制,能精确快速地进行入库出库操作,运行平稳,上位机上能正确实时显示库位信息,达到了预期的结果。
文摘Age-related macular degeneration(AMD)is the leading cause of irreversible vision loss in older adults,with early-stage features including subretinal lipid deposits and progressing to retinal geographic atrophy and choroidal neovascularization in advanced stages.The dysregulation of ocular lipid metabolism,oxidative stress,and inflammation are critical risk factors for AMD pathogenesis.7-ketocholesterol(7-KC),a hallmark of ocular lipid metabolism disorders,is a significant component of subretinal lipid deposits in AMD patients,exhibiting toxicity to retinal cells and exacerbating lipotoxic aging.This review elaborates on the biosynthesis and metabolism of 7-KC in the retina,investigates its detoxification mechanisms by examining its binding proteins,and summarizes recent progress on kinase signaling pathways induced by 7-KC through inflammatory cytokines and intracellular effectors.The aim is to pinpoint potential pharmacological targets,nutritional compounds,and synthetic molecules to explore the potential of targeting 7-KC for AMD treatment.
文摘以邻卤代苯胺和水合氯醛、盐酸羟胺为原料,通过Sandmeyer异亚硝基乙酰替苯胺合成法制备得7-卤代靛红,再经硼氢化钠/三氟化硼乙醚体系还原制备得7-卤代吲哚。考察了酰胺化反应温度和反应时间、成环反应温度、还原体系种类及还原剂用量对反应收率的影响,所有产物结构均通过~1H NMR、^(13) C NMR和元素分析等进行了表征。结果表明,制备7-氟吲哚、7-溴吲哚、7-氯吲哚时,较佳的酰胺化反应温度和反应时间分别为回流10min、80℃4h和80℃3h,较佳的成环反应温度分别为80℃、85℃和80℃,较优的还原体系为硼氢化钠/三氟化硼乙醚体系,较优的还原剂用量为n(硼氢化钠)∶n(三氟化硼乙醚)∶n(7-卤代靛红)=3.0∶2.25∶1。该工艺具有成本低、反应条件温和、收率较高,操作简便等优点,适合批量制备7-卤代吲哚。
