简介:<正>那是一个阴霾很重的冬日,大年初一的早上。那样的阴霾里,景物却显得很清晰,因为没有光影的明暗对比,人和物是平面的,每一点细节都丝丝入目。那个小女孩儿,来自隔壁弄堂,黄巴巴的没洗净似的脸,头发也是枯黄而且稀疏的,但眉眼还算清秀。我们的弄堂和他们的弄堂没什么往来,他们有时候会侵入到我们的前弄里玩,而我们通常不开前门,进出都走后门,小孩子呢,通常又不被应许走出家门。可是这一时刻,是因为过年,还是别的什么理由,纪律突然松懈,前门开了,我们和他们相遇。这条前弄变得很喧哗,闹喳喳的。那小女孩儿背着手,靠在竹篱笆上,篱笆那边是一所女中,在寒假中,又是过年,女中的操场上没有一个人。她靠在篱笆上,面前站着一圈人,其中也有
简介:摘要目的探讨1 064 nm/755 nm双波长激光脱毛的临床疗效。方法2017年1—12月,吉林大学中日联谊医院皮肤科脱毛患者60例,男7例、女53例,年龄18~52(30±7)岁。用双波长激光器对同一患者的对称部位或2个不同部位分别用1 064 nm或755 nm激光进行脱毛治疗,每6周1次,共6次。治疗结束6周后评估疗效、不良反应、患者满意度。结果1 064 nm和755 nm激光脱毛总有效均为58例,占96.7%,各部位激光脱毛有效率在1 064 nm和755 nm两组比较差异无统计学意义(P>0.05)。1 064 nm激光色素沉着1例,755 nm激光色素沉着2例,两者比较差异无统计学意义(P>0.05);所有患者均未出现色素减退、水疱及瘢痕。1 064 nm组患者满意57例,占95.0%,755 nm组患者满意59例,占98.3%。结论1 064 nm/755 nm双波长激光脱毛均安全有效。
简介:Duetoitsmajorroleinmaintainingthewater-retainingpropertiesoftheepidermis,ceramideisofgreatcommercialpotentialincosmeticsandpharmaceuticalssuchashairandskincareproducts.However,currentsyntheticapproachesforceramidearetediousandtime-consumingforindustrialapplications.Therefore,itisdesirabletofindanalternativecost-efficientandhighly-yieldmethodforobtainingthevaluableproducts.Inpresentstudy,thepotentialofproducingceramidethroughenzymatichydrolysisofsphingomyelinwithenzymeirradiatedby808nmlighthasbeenstudied.Withenzymeirradiatedby808nmlight,itsactivitycanbeenhancedandreactionspeedcanbeincreasedsignificantly.
简介:Wepresentanovelandsimplemethodtoobtainanultrawidefreespectralrange(FSR)siliconringresonatortogetherwithatuningrangecoveringtheentirespectrumfrom1500to1600nm.AringresonatorwithalargeFSRtogetherwithahighQfactor,hightuningefficiency,andlowfabricationcostandcomplexityisdesiredformanyapplications.Inthispaper,weintroduceanovelwaytomakesucharingresonator,whichtakesadvantageofthewell-knownresonance-splittingphenomenon.ItisasingleringresonatorwithanFSRofmorethan150nmaround1550nmandwhichhasaneasythermo-optictunabilitythatcanproduceatuningrangearound90nmorevenmore.Moreover,thedeviceissimpletoimplementandcanbefabricatedinstandardcomplementarymetal-oxidesemiconductortechnologywithoutrequiringanykindofcomplicatedprocessingorextramaterials.Thepotentialapplicationsincludesinglemodelasercavities,wavelengthdivisionmultiplexingfilters,(de)multiplexers,opticalsensors,andintegratedreflectors.