简介：在最近的年里，microchannel热exchangers在技术区域的一个大变化被使用了。这些问题之一，它在microchannel技术存在是流动不稳定性，包括在为在特别的二阶段的流动的盒子的microchannels数组的液体maldistribution微蒸发器。解决这个问题的方法之一是在microchannel入口的流动率控制。然而，由于到microchannels的数组的很小的入口经典流动限制设备(与动人的机械部分)将困难适用。为流动率控制的新设备在论文基于dielectrophoresis力量被介绍。为致冷的流动控制使用这台设备的试验性的研究结果在论文被介绍。在应用电压和频率和流动率之间的试验性地获得的关系被介绍为为refrigerants和另外的不稳定的液体使用如此的方法显示出机会。

简介：ChimonanthusplantswidelydistributedinsouthernareaofChina,whichhavealonghistoryofediblesandmedicine.PhytochemicalinvestigationshaveshownthatChimonanthusproduced143non-volatileconstituents,includingalkaloids,flavonoids,terpenoids,coumarinsandothers,whichexhibitsignificantanti-oxidant,anti-bacterial,anti-cancer,anti-inflammatory,antihyperglycemic,antihyperlipidemicandotherbiologicalactivities.Onthebasisofsystematicreviewingofliteratures,thisarticleoverviewsthenon-volatileconstituentsandpharmacologyofChimonanthusfromdomesticandforeignoverthelast30years(untilJune2018),andmayprovideausefulreferenceforthefurtherdevelopmentofChimonanthus.

简介：Allplantsemitawiderangeofvolatilecompounds,theso-calledbiogenicvolatileorganiccompounds(BVOC).BVOCemissionshavereceivedincreasedscientificattentioninthelasttwodecadesbecausetheymayprofoundlyinfluencethechemicalandphysicalpropertiesoftheatmosphere,andmaymodulateplanttolerancetoheat,pollutants,oxidativestressandabioticstresses,andaffectplant-plantandplant-insectinteractions.Urbanforestrymayhaveahighimpactonatmosphericcomposition,airquality,environment,andqualityoflifeinurbanareas.However,fewstudieshavebeencarriedoutwheretheemissionofBVOCcouldhaveimportantconsequenceforthequalityofairandcontributetopollutionepisodes.AscreeningofBVOCemissionbythemixedstandconstitutingurbanforestsisthereforerequiredifemissionsaretobereliablypredicted.Monitoringtheemissionratessimultaneouslywithmeasurementsofairquality,plantphysiologyandmicrometeorologyonselectedurbanforests,willallowdetailedquantitativeinformationontheinventoryofBVOCemissionsbyurbanvegetationtobecompiled.Thisinformationwillmakeitpossibletoproposeaninnovativemanagementofurbanvegetationincitiescharacterisedbyheavyemissionsofanthropogenicpollutants,aimingattheabatementofBVOCemissionsthroughtheintroductionorselectionofnon-BVOCemittingspeciesinurbanareassubjectedtopollutionepisodesandinthenewafforestationareascoveringperi-urbanparks,greenbeltsandgreencorridorsbetweenperi-urbanruralareasandtheconurbations.

简介：目的：比较不同产地艾叶挥发性成分，为艾叶的质量标准提供化学依据。方法：以五个产地的艾叶为原料，采用水蒸气蒸馏法提取挥发油，应用气相色谱．质谱联用（Chromatography-massSpectrometer,GC-MS）技术对其化学成分进行鉴定，并进行半定量计算。结果：湖北蕲春和河北安国艾叶含多种挥发油成分，且各成分之间实际含量分布较均匀。结论：不同产地艾叶所含挥发油种类的多少及实际含量是不同的。

简介：Foranthracitewithverylowcontentofvolatilematter,alltheboilermakersofinternationalprestigeproposefurnaceswithU-ordoubleU-flamefortheburningofsuchfuel.Fortheexisting4-cornertangentialfiringboilersinFujianpowerplants,muchresearchandinnovationeffortshavebeenexpendedtoburnFujiananthracites,andnotableimprovementofcombustionconditionswasattained.Thisledtoourbeliefthattangentialfiringboilerscanalsosuccessfullyfireanthracitewithverylowvolatilematter.ThispaperoutlinestheresearchanddevelopmentworkonsuchboilersinpowerplantsinFujianProvince.

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简介：Thethermogravimetryanalyzercoupledwiththepyrolysisgaschromatography/time-of-flightmassspectrometrytechnologywasusedinthisstudytoinvestigatethemasslossbehaviorandvolatilereleasecharacteristicsofabituminouscoal.Theresultsshowedthatwithanincreasingheatingrate,thecharacteristicparametersandTG/DTGcurvesshiftedobviouslytothehighertemperatureregion.ThepyrolysisofabituminouscoalatdifferentheatingratescanbedividedintotwostagesaccordingtotheCoats-Redfern(C-R)plots.TheactivationenergyobtainedfromtheC-Rmethodis50.21—85.14kJ/moland5.14—7.24kJ/molataheatingraterangeof8—300℃/minforthefirstandsecondpyrolysisstages,respectively.Aromatichydrocarbonsweredominantinthevolatileproductsduringfastpyrolysisofthecoal,followedbytheolefins,whereasthephenolswerethethirdmajorcomponents.Withtheincreaseofpyrolysistemperature,theheavycomponentsinthevolatilespeciesincreased;meanwhilethephenolcrackingreactionswereintensified.Thecarbonnumberofolefinswasmainlyconcentratedin3—9,andthearomaticsweremainlycomposedofthecompoundsofC6—C13.Thisstudycanprovideabasicreferenceforfastpyrolysisofcoalandotherthermalchemicalconversionprocesses.

简介：Lowpowerconsumptionisamajorissueinnowadayselectronicssystems.ThistrendispushedbythedevelopmentofdatacenterrelatedtocloudservicesandsoontotheInternetofThings(IoT)deployment.Memoriesareoneofthemajorcontributorstopowerconsumption.However,thedevelopmentofemergingmemorytechnologiespavesthewaytolow-powerdesign,throughthepartialreplacementofthedynamicrandomaccessmemory(DRAM)withthenon-volatilestand-alonememoryinserversorwiththeembeddedordistributedemergingnon-volatilememoryinIoTobjects.Inthelattercase,non-volatileflip-flops(NVFFs)seemapromisingcandidatetoreplacetheretentionlatch.Indeed,IoTobjectspresentlongsleeptimeandNVFFsoffertosavedatainregisterswithzeropowerwhentheapplicationisidle.ThispapergivesanoverviewofNVFFarchitectureflavorsforvariousemergingmemorytechnologies.

简介：Traditionaldigitalprocessingapproachesarebasedonsemiconductortransistors,whichsufferfromhighpowerconsumption,aggravatingwithtechnologynodescaling.Tosolvedefinitivelythisproblem,anumberofemergingnon-volatilenanodevicesareunderintenseinvestigations.Meanwhile,novelcomputingcircuitsareinventedtodigthefullpotentialofthenanodevices.Thecombinationofnon-volatilenanodeviceswithsuitablecomputingparadigmshavemanymeritscomparedwiththecomplementarymetal-oxide-semiconductortransistor(CMOS)technologybasedstructures,suchaszerostandbypower,ultra-highdensity,non-volatility,andacceptableaccessspeed.Inthispaper,weoverviewandcomparethecomputingparadigmsbasedontheemergingnanodevicestowardsultra-lowdissipation.

简介：酸不稳定的硫化物(AVS)在影响二价的猫的毒性起一个重要作用，是众所周知的在缺氧的沉积以内的离子的金属。在学习在Jiaozhou海湾以内从潮滩收集的沉积岩心试样，中国，我们发现AVSconcentration逐渐地与深度增加并且从高潮滩减少到低潮滩区域。我们基于同时提取的金属(SEM)和AVS的臼齿的比率在潮滩评估了化学活动和重金属的简历可获得性。SEM/AVS的价值通常除了表面层在这个区域是不到1，它建议重金属仅仅在表面层举办化学活动。SEM最高度在氧化还原作用层的边界被集中。SEM在整个潮滩有类似的深度分布。低潮滩沉积的Theaeration显示SEM逐渐地经由孔隙水搬到更深的地点。

简介：Newnon-volatilememory(NVM)technologiesareexpectedtoreplacemainmemoryDRAM(dynamicrandomaccessmemory)inthenearfuture.NANDflashtechnologicalbreakthroughshaveenabledwideadoptionofsolidstatedrives(SSDs)instoragesystems.However,flash-basedSSDs,bynature,cannotavoidlowenduranceproblemsbecauseeachcellonlyallowsalimitednumberoferasures.ThiscangiverisetocriticalSSDreliabilityissues.SincemanySSDwriteoperationseventuallycausemanySSDeraseoperations,reducingSSDwritetrafficplaysacrucialroleinSSDreliability.ThispaperproposestwoNVM-basedbuffercachepolicieswhichcanworktogetherindifferentlayerstomaximallyreduceSSDwritetraffic:amainmemorybuffercachedesignnamedHierarchicalAdaptiveReplacementCache(H-ARC)andaninternalSSDwritebufferdesignnamedWriteTrafficReductionBuffer(WRB).H-ARCconsidersfourfactors(dirty,clean,recency,andfrequency)toreducewritetrafficandimprovecachehitratiosinthehost.WRBreducesblockerasuresandwritetrafficfurtherinsideanSSDbyeffectivelyexploitingtemporalandspatiallocalities.ThesetwocomprehensiveschemessignificantlyreducetotalSSDwritetrafficateachdifferentlayer(i.e.,hostandSSD)byupto3x.Consequently,theyhelpextendSSDlifespanwithoutsystemperformancedegradation.

简介：flathead橡树borerCoroebusundatusF。（翘目：Buprestidae)是瓶塞橡树QuercussuberL的主要害虫之一。在引起大经济损失到瓶塞工业的地中海区域。很，很少对它的生物学和行为被知道，到目前为止，没有控制措施被建立了。我们在场一个预研项目的结果试图为监视这个有害害虫开发一个有效套住方法。在3年的地研究，从主人与绿叶volatiles(GLV)的混合物引诱的紫色有颜色的棱柱陷井被显示了最有效的联合抓住C。undatus成年人(完全女性)与另外的陷井和诱惑相比，类型测试了。波长和反射大小表明紫色陷井展出类似于那些的山峰价值发现了在的反射腹并且两性的elytral表皮，在这种为配偶地点建议视觉暗示的参与。介绍的数据是第一由一个基于引诱剂的套住方法表明类Coroebus的成年人的俘获。

简介：Theworldwideinterestinthegutmicrobiomeanditsimpactontheupstreamliverhighlightacriticalupsidetobreathresearch:itcanuniquelymeasureotherwiseunmeasurablebiology.Bacteriamakegases[volatileorganiccompounds(VOCs)]thataredirectlyrelevanttopathophysiologyofthefattyliverandassociatedconditions,includingobesity.MeasurementoftheseVOCsandtheirmetabolitesintheexhaledbreath,therefore,presentanopportunitytosafelyandeasilyevaluate,onbothapersonalandapopulationlevel,someofourmostpressingpublichealththreats.Thisisanopportunitythatmustbepursued.Todate,however,breathanalysisremainsaslowlyevolvingfieldwhichonlyoccasionallyimpactsclinicalresearchorpatientcare.Onemajorobstacletoprogressisthatbreathanalysisisinherentlyandemphaticallymutli-disciplinary:itconnectsengineering,chemistry,breathmechanics,biologyandmedicine.Unbalancedorincompleteteamsmayproduceinconsistentandoftenunsatisfactoryresults.Asecondimpedimentisthelackofawell-knownstepwisestructureforthedevelopmentofnon-invasivediagnostics.Asaresult,thebreathresearchlandscapeisrepletewithorphanedsingle-centerpilotstudies.Often,importanthypothesesandkeyobservationshavenotbeenpursuedtomaturation.ThispaperreviewstherationaleandrequirementsforbreathVOCresearchappliedtothegut-fattyliveraxisandofferssomesuggestionsforfuturedevelopment.

简介：提炼axyridis智慧女神雅典娜在它被介绍了的大多数领土被看作侵略的种的亚洲女士甲壳虫Harmonia。因为蚜虫蜜露为许多蚜虫食肉动物和parasitoids充当引诱剂，这个工作的目的是收集并且鉴别不稳定的混合物免除了分泌产品蚜虫评估这些semiochemicals怎么能影响H。axyridisforaging行为。12不稳定的化学药品包括四白酒，三个酉同类，三醛，pyrazine和monoterpene从MegouraviciaeBuckton蜜露被识别。volatiles3-methyl-1-butanol和3-methyl-butanal作为免除M的二很丰富的semiochemicals被加亮。viciae蜜露。ViciafabaL。与粗略的蜜露对待的工厂与位于工厂的40%吸引的甲壳虫吸引了超过80%测试个人。四不稳定的混合物(3-hydroxy-2-butanone，3-methyl-butanal，3-methyl-1-butanol和柠檬油精)也被加亮向气味来源吸引超过75%coccinellids并且在工厂上定位他们中的大约35%个。自从89%H，柠檬油精是最有效的引诱剂。axyridis对这气味作出回应。象人工的蜜露的作文一样的识别semiochemicals的使用能当然是有用的控制亚洲女士甲壳虫H的疏开。axyridis。

简介：Codfishisakindofabyssalfishspecieswithagreatvalueinfoodindustry.However,theflavorofcodfish,especiallytheunpleasantodor,hascausedseriousproblemsinitsprocessing.Toaccuratelyidentifythevolatilecompoundsincodfish,acombinationofsolidphasemicro-extraction(SPME)methodandsimultaneousdistillationextraction(SDE)methodwasusedtoextractthevolatiles.Gaschromatography-massspectrometry(GC-MS)alongwithKovatsindices(KI)andauthenticstandardcompoundswereusedtoidentifythevolatiles.Theresultsshowedthatatotalof86volatilecompoundswereidentifiedincodfish,ofthem24wereextractedbySDE,69compoundsbySPME,and10compoundsbybothSDEandSPME.Seventyvolatilecompoundswerefoundtohavespecificodors,ofthem7typicalcompoundscontributedsignificantlytotheflavorofcodfish.Alcohols(i.e.,(E)-2-penten-1-oland2-octanol),esters(i.e.,ethylbutyrateandmethylgeranate),aldehydes(i.e.,2-dodecenalandpentadecanal)contributedthemosttofreshflavorwhilenitrogencompounds,sulphurcompounds,furans,aswellassomeketones(i.e.,2-hydroxy-3-pentanone)broughtunpleasantodor,suchasfishyandearthyodor.ItwasindicatedthatthecombinationofmultipleextractionmethodsandGC-MSanalysiscanenhancetheaccuracyofidentification,andprovideareferenceforthefurtherstudyonflavorofaquaticproducts.

简介：WithagreatdifferenceintherapeuticeffectsofMahuang(MH,thestemsofEphedrasinica)andMahuanggen(MHG,therootsofEphedrasinica),chemicaldifferencesbetweenMHandMHGshouldbeinvestigated.Inthepresentstudy,gaschromatography-massspectrometry(GC-MS)-basedplantmetabolomicswasemployedtocomparevolatileoilprofilesofMHandMHG.TheantioxidantactivitiesofvolatileoilsfromMHandMHGwerealsocompared.32differentialchemicalmarkerswereidentifiedaccordingtothevariableimportanceintheprojection(VIP)valueoforthogonalpartialleastsquaresdiscriminantanalysis(OPLS-DA)andPvalueofMann-Whitneytest.Amongthem,chemicalmarkersoftetramethylpyrazine(TMP)andα-terpineolwerequantified.TheircontentsweremuchhigherinmostMHsamplescomparedwithMHG.TheantioxidantassaydemonstratedthatMHhadsignificantlyhigherfreeradical-scavengingactivitythanMHG.AlthoughMHandMHGderivedfromthesamemedicinalplant,therewasmuchdifferenceintheirvolatileoilprofiles.MHsampleshadsignificantlyhighercontentoftworeportedpharmacologicallyimportantchemicalmarkersofTMPandα-terpineol,whichmayaccountfortheirdifferentantioxidantactivities.

简介：从Moslachinensis格言射出的不稳定的混合物被稳固阶段的microextraction(HS-SPME)和headspace液体阶段microextraction(HS-LPME)与煤气的层析团spectrometry(GCMS)相结合的headspace分析。从Moslachinensis格言的主要volatiles在这份报纸被学习。61混合物被分开并且识别，这能被看见。49不稳定的混合物被SPME方法识别，主要包括myrcene，-terpinene,p伞花烃，(E)-ocimene,瑞香草分，瑞香草分醋酸盐和(E)--farnesene。45主要不稳定的混合物被LPME方法识别，包括-thujene,-pinene,樟脑帖，butanoic酸，2-methylpropyl酉旨，myrcene，butanoic酸，丁基酉旨，-terpinene,p伞花烃，(E)-ocimene,钢瓶煤气，1,1-dibutoxy-，瑞香草分，瑞香草分醋酸盐和(E)--farnesene。在分析不稳定的混合物以后，多重线性回归(MLR)方法被用于造回归模型。然后，量的结构保留关系(QSRR)模型被预兆能力的测试验证。预言结果在对试验性的价值的好同意。结果证明headspaceSPME-GC-MS和LPME-GC-MS是对不稳定的混合物的分析合适的简单、快速、容易的样品丰富技术。这调查为甚至当标准候选人不在时预言新混合物的保留索引提供了一个有效方法。

简介：在草食动物攻击以后的摘要，许多植物射出导致草食动物的植物volatiles(HIPV)。HIPV能吸引食肉动物或排斥草食动物，从而调停tritrophicplantherbivorecarnivore相互作用。HIPV充当在有机体之间的化学信息；因此，他们的可变性和稳定性是重要的。在现在的学习，在不稳定的排出物的变化，从茶植物山茶sinensis(O。Ktze)由茶象鼻虫Myllocerinusaurolineatus(Voss)损坏了(翘目：Curculionidae)与象鼻虫密度，光周期和群袭持续时间，被调查。高密度的象鼻虫导致的volatiles比低密度的象鼻虫导致的那些更充满作文和数量，是否在中午，夜里或在象鼻虫移动以后。导致的不稳定的排出物在在群袭以后的第二和第三天是类似的，并且专业的排出物导致了显示的混合物日报周期。沉香醇，(E，E)--farnesene，和本甲基nitrile主要在中午被射出，而1,3,8-p-menthatriene和(E)--ocimene最大地在夜里被射出。给不同排放动力学，重要差别在导致中午、导致夜里的volatiles之间被发现。在摘要，不同象鼻虫密度损坏的茶植物在一特别时间射出一个相对稳定的信号。这稳定性能在主要导致的不稳定的混合物，他们的相对比率和导致的volatiles的排放动力学的二密度下面被归因于类似。