简介:Thetitlecompounds4,4'-oxobis(propham)((?)n)(C20H24N2O5,Mr.=372.41)wassynthesizedbytheadditionreactionofcorresponding4,4'-oxobisphenyldiisocyanatewithisopropanol.ThecrystalstructurewasdeterminedbyX-raydiffractionmethod.Thecrystalistriclinicsystem,spacegroupP-1witha=8.5107(17),b=9.1164(18),c=14.5701(3)A,α=80.44(3),β=85.25(3),γ=62.88(3)°,V=992.2(3)A3,Z=2,Dc=1.247g/cm3,F(000)=396,R=0.0520,wR2=0.1434for4336observedreflectionswith[I>2σ(I)].X-rayana...
简介:烟叶采烤是烟叶生产中的重要环节。黔西南州安龙县依托烟农综合服务合作社,采取“6+6S”烟叶采烤一体化服务模式,即6道操作工序(将烟叶采烤划分为成熟采收、鲜烟运输、分类编竿、分类装炕、专业烘烤、下炕初分称重),“6S”现场管理(整理、整顿、清洁、素养、安全、节约),具有流程作业工序化,组织管理车间化,采烤操作标准化的特点,实现了烟叶生产组织化程度、烟叶采烤质量的提高和过程的精准把控,具有一定推广价值。
简介:Inordertoexplorethefeasibilityofcryopreservationondormantforesttreeseeds,theseedviabilityof4species(Malusbaccata,Prunusdavidiana,P.armenicaandAmygdalupersica)withmoisturecontent(MC)changingwastestedafter30-daystorageinliquidnitrogenof-196℃.Theresultsshowedthatallthe4speciesofseedscankeepastableviabilityaftercryopreservation.Intheprocedure,theoptimumMCwas48g/kgforM.baccata,27g/kgforP.davidiana,31g/kgforP.armenicaand45g/kgforA.persica,...