简介：从纯carrageenans获得的Oligo-carrageenans(OC)从海洋的红水藻提取了由在烟草植物和桉树类树提高光合作用和基础新陈代谢刺激生长。另外，OC刺激第二等的新陈代谢，增加涉及对病原体的防卫的代谢物的水平。在这个工作，我们在高度的增加以后分析了OCkappa的效果，在涉及碳，氮和硫吸收的基础新陈代谢酶的活动，ribulose1,5biphosphatecarboxylase/oxygenase(rubisco)，glutamate脱氢酶(GDH)和O-acetylserinethiol-lyase(OASTL)，并且在支持生长的荷尔蒙，植物生长素吲哚醋酸(IAA)和在松(Pinusradiata)的赤霉素GA3,的水平，树在1和5的集中与OC对待kappa?mg?mL在1点与OCkappa对待的松?mg?mL1在高度显示出类似的增加，但是显示一更高比在5点与OCkappa对待的那些在IAA和GA3的全部的叶绿素，rubisco的活动，GDH和OASTL和水平增加了?mg?mL1。因此，OCkappa刺激生长和基础新陈代谢并且在松树上增加支持生长的荷尔蒙的水平，主要在1点?mg?mL1。

简介：Nitrogen(N)useefficiencyisusuallylessthan50%,anditremainsamajorprobleminricecultivation.Controlledreleasefertilizer(CRF)technologyisoneofthewell-knowneffortstoovercomethisproblem.TheefficiencyofCRF,however,isverymuchdependentonthetimingofnutrientrelease.ThisstudywasconductedtodeterminetheprecisetimeofNuptakebyriceasaguidelinetodevelopefficientCRF.FertilizerNuptakebyriceatdifferentgrowthstageswasinvestigatedbyusing15Nisotopictechnique.Ricewasplantedinpots,with15NureaasNsourceattherateof120kg/hm2.Potassiumandphosphoruswereappliedatthesamerateof50kg/hm2.Standardagronomicpracticeswereemployedthroughoutthegrowingperiods.Riceplantswereharvestedeverytwoweeksuntilmaturationatthe14thweekandanalyzedfortotalNand15Ncontent.Nitrogenderivedfromfertilizerwascalculated.TotalNuptakeinplantsconsistentlyincreaseduntilthe11thweek.Afterthat,itstartedtoplateauandfinallydeclined.Moreover,Nutilizationbyriceplantspeakedat50%,whichoccurredduringthe11thweekaftertransplanting.Nderivedfromfertilizerinriceplantswereintherangeof18.7%to40.0%inallplanttissues.TheremainingNwasderivedfromsoil.Basedonthisstudy,NreleasefromCRFshouldcompletebythe11thweekafterplantingtoensurethemaximumfertilizerNuptakebyriceplants.EfficientCRFshouldcontributetohigherNderivedfromfertilizerwhichalsoresultedinahighertotalNuptakebyriceplants,increasingthepotentialofricetoproducehigheryieldwhileatthesametimeofreducingloss.

简介：H7N9型禽流感是一种新型禽流感，我国于2013年3月底在上海和安徽两地率先发现。H7N9型禽流感是全球首次发现的新亚型流感病毒，被该病毒感染均在早期出现发热等症状。易感染的动物有家禽类（如鸡、鸭、鹅），其他禽类（如鸽）也比较容易感染。国家卫生和计划生育委员会2013年4月3日印发人感染H7N9禽流感诊疗方案、防控方案及医院感染预防与控制技术指南。