资源预览需要最新版本的Flash Player支持。 您尚未安装或版本过低,建议您
atmospheric,YoshihiroKita9,2219DecembevaqueousAcOH,4H2SO4w/w,onstraw,ratioofliquortostrawL/S10v/w,pulpingtemperature105C176C,andpulpingtimeeratedinabundancearoundtheworld.Theaverageyieldofstrawis1.3–1.4kgperkgofgrain.InNorthimprovedigestibilitywhenwheatstrawisusedaslivestockfeedJackson,1977Flachowskyetal.,1996andmicrobialaction,suchassteamexplosionMontane?etal.,1998,diluteacidhydrolysisGrohmannetal.,1985,wetoxidationKlinkeetal.,2002,autohydrolysisLawtheretal.,1996Kubikovaetal.,1996andorganosolvJime?nezetal.,1997Sunetal.,1997.Correspondingauthor.PresentaddressDepartmentofWoodScience,UniversityofBritishColumbia,2424MainMall,Vancouver,BC,Canada.Tel.fax.Emailaddressxpaninterchange.ubc.caX.Pan.BioresourceTechnology24/seefrontmatterC2112004ElsevierLtd.Allrightsreserved.AmericaandEurope,nearly300milliontonsofwheatstrawareproducedyearlyMontane?etal.,1998.Wheatstrawisalignocellulosicmaterialcontainingabout35–40cellulose,30–35hemicellulose,10–15lignin,5–10mineralandsmallamountofothercomponents.Althoughtremendouseffortshavebeenattemptedtoconvertitintovalueaddedproducts,wheatstrawhasnotyetbeenfullyutilized,especiallyindevelopedcounKarunanandaaandVarga,1996.Inaddition,extensiveliteraturehasbeenpublishedconcerningbioconversionoflignocellulosicmaterialstobiochemicalsandbiofuelsGardeetal.,2002Berndesetal.,2001ChumandOverend,2001Kaylenetal.,2000Lee,1997.Sincelignocellulosicmaterialsareonlypartiallydigestibleintheirnativeform,manymechanical,chemicalandbiologicalpretreatmentprocesseshavebeenproposedtomakethesubtractssusceptibletoenzymatic3h,wheatstrawwasfractionatedtopulpcellulose,ligninandmonosaccharidesmainlyfromhemicellulosewithyieldsofapproximately50,15and35,respectively.Aceticacidpulpfromthestrawhadanacceptablestrengthforpaperandcouldbebleachedtoahighbrightnessover85withashortbleachingsequence.Aceticacidpulpwasalsoapotentialfeedstockforfuelsandchemicals.Theaceticacidprocessseparatedpentoseandhexoseinwheatstrawtoalargeextent.Mostofthepentosexylanwasdissolved,whereasthehexoseglucanremainedinthepulp.Approximately30ofcarbohydratesinwheatstrawwerehydrolyzedtomonosaccharidesduringaceticacidpulping,ofwhichxyloseaccountedfor70andglucosefor12.Theaceticacidligninfromwheatstrawshowedrelativelylowermolecularweightandfusibility,whichmadetheligninapromisingrawmaterialformanyproducts,suchasadhesiveandmoldedproducts.C2112004ElsevierLtd.Allrightsreserved.KeywordsWheatstrawAceticacidFractionationCharacterizationLigninHemicelluloseCellulose1.IntroductionWheatstraw,anagriculturalresidue,isannuallygentries.Currently,besidesremaininginthefieldtobeincorporatedintosoil,wheatstrawismainlyusedforseveralapplications.PretreatmentisusuallyneededtoFractionationofwheatstrawbySugwonKima,aDivisionofAdvancedMaterialsEngineering,RCIT,ChonbukNationalUniversity,Jeonju561756,RepublicofKoreabFacultyofAgriculture,HokkaidoUniversity,Received7June2002receivedinrevisedformAvailableonlineAbstractFractionationofwheatstrawwasinvestigatedusinganatmosphericdoi10.1016/j.biortech.aceticacidprocessSanobNishi9,Kitaku,Sapporo0608589,JapanOctober2004accepted22Octoberaceticacidprocess.Underthetypicalconditionsof90v/Atchison,1996.However,thereareseveraltroublesomeproblemsinstrawpulping.Thelowqualityfibersthewheatstrawwasairdried,cutshorttoabout2cm,andstoredforchemicalanalysisandaceticacidpulping.2.2.AtmosphericaceticacidAcOHpulpingAsshownschematicallyinFig.1,wheatstrawwasdelignifiedbyrefluxingpulpingunderatmosphericpressureinanaqueoussolutionofAcOHthatcontainedH2SO4ascatalystofdelignification.Thepulpingwascarriedoutinbatchesof100gdrystrawinatwoliter,roundbottom,andwidemoutheasytoloadboilingflaskequippedwithacondenser.Pulpingconditionswere90v/vAcOH,4H2SO4w/w,onstraw,ratioofliquortostrawL/S10v/w,andpulpingtime3h.Pulpingtemperaturewas105C176C,whichwastheboilingpointofthepulpingliquor.Aftercooling,crudepulpfibers,mainlycellulosewasseparatedfrompulpingliquorbyfiltration.AftersuccessivelywashingwithaqueousAcOH3300ml,80,v/vandwater3300ml,thecrudepulpwasinitiallydisintegrated,andsubsequentlysubjectedtoscreeningonan8cutflatscreentoremoverejects.ScreenedpulpwascolTechnology–andthehighamountofnonfibercellsinstrawlimitstrawpulptobeusedinlowgradepaper.Thenonfibercellsresultinpoordrainabilityofstrawpulp,whichcausesdifficultiesinwashing,condensing,andsheetformingoperations.Furthermore,thereareproblemsintherecoverysystemofstrawpulpingwasteliquorsduetohighviscosity,lowcalorificvalue,and,inparticular,highsilicacontent.Asaresult,thewasteliquorfromstrawpulpingoperationsismostlydischargedintotheenvironmentwithouttreatment,whichcausesseriouswaterpollution.AceticacidprocessisaneffectivemethodtodelignifylignocellulosicmaterialstoproducepulpforpaperNimzandCasten,1986Sanoetal.,1990Panetal.,1998.Thepulpingoperationcanbeconductedatatmosphericpressure,orabove.Aceticacidusedinpulpingcanbeeasilyrecoveredbystillingoperationandreusedintheprocess.Aceticacidprocessisalsoanefficientmethodtofractionatelignocellulosicmaterials.Thethreedominantcomponentsinlignocellulosics,cellulose,hemicelluloseandlignin,canbeeffectivelyseparatedbyaceticacid.Aceticacidpulpcellulosehasacomparablephysicalstrengthtoconventionalpulpsforpaper.Anotherpotentialapplicationofaceticacidpulpisfeedstockforcellulosederivativesandforfuelsandchemicals.Aceticacidligninisanoptimalfeedstockformanyvalueaddedligninproductsduetoitslowermolecularweightandhigherreactivity.Thesugarsfromhemicellulosearereadilyconvertibletochemicalsandfuels.Toestablishanovelzeroemissionprocesstofullyutilizewheatstraw,weusedanaceticacidprocesstofractionatewheatstrawandtheresultingfractionsweresubsequentlyconvertedintovalueaddedproducts.Theobjectivesofthepresentpaperweretofractionatewheatstrawintocellulose,ligninandhemicellulosesugarswithatmosphericaceticacidprocess,toinvestigatethecharacteristicsoftheobtainedfractions,andtoevaluatethepotentialoftheirapplications.2.Experimental2.1.WheatstrawWheatstrawTriticumvulgareCV.HoroshiriusedinthisstudywasobtainedfromtheexperimentalfarmofWheatstrawcanserveasrawmaterialforpulpandpaperindustry.Thisisparticularlyimportantincountriesthatareshortofforestresource,suchasChinaHammettetal.,2001.InChina,morethan9milliontonsofstrawpulpisproducedeveryyear,whichaccountsforabout90ofglobalstrawpulpingcapacityS.Kim,Y.Sano/BioresourceHokkaidoUniversity,Sapporo,Japan.Afterharvest,lectedona200meshscreen.ThepulpingliquorseparatedfromcrudepulpandabovementionedAcOHwashingswerecollected,combined,andevaporatedtoneardrynessconcentratedwasteliquorusingarotaryevaporatortorecoveraceticacid,whichcanbeusedeitherinthenextpulpingbatchortowashcrudepulp.ThewaterwashingsofthecrudepulpwerecollectedandpouredintotheconcentratedwasteliquorobtainedaboveafterrecoveringAcOH.Theresultingprecipitatewasaceticacidlignin.Theligninwasfiltered,washedCrudepulpAcOHwashingsWasteliquorWashingWaterwashingsEvaporationScreeningRejectsResiduesPulpLigninAceticacidpulpingAceticacidWheatstrawWatersolublesFig.1.Flowchartforfractionatingwheatstrawbytheaceticacidprocess.Technologywithwater,andsubsequentlylyophilized.Thefiltrateandwashingsoftheligninwerecollectedandconcentratedusingarotaryevaporator.Theresidueobtainedwaswatersolubles,whicharesugarsmainlyfromhemicellulosedegradation.2.3.BleachingofaceticacidpulpPulpbleachingwasperformedusingathreestagesequenceofE/P–D–P.Here,E/P,DandPstandforthethreebleachingstagesofalkalineextractionwithperoxide,chlorinedioxidebleaching,andperoxidebleaching,respectively.Bleachingoperationwasconductedinapolyethylenebaginawaterbath.BleachingconditionswereE/Pstage,5NaOHand1.0H2O2onpulp,12consistency,80C176Cand2hDstage,0.5ClO2onpulp,pH4.5,12consistency,70C176Cand2hPstage,0.5H2O2onpulp,12consistency,pH11,70C176Cand2h,respectively.Thepulpwasthoroughlywashedwithwaterbetweenstagesandafterbleaching.2.4.DeterminationofashandsilicainwheatstrawandaceticacidpulpThetestspecimen3gwasweighedinacrucible,carbonizedgentlyoveraBunsenburner,andthenignitedinamufflefurnaceat575±25C176C.Theresiduewasweighedasash.Becauseofthehighsilicacontentofwheatstraw,ethanolsolutionofmagnesiumacetate5ml,whichcontained4.054gofMgAcO2AE4H2Oin1lof95aqueousethanol,wasaddedtothetestspecimentopreventincompleteincinerationcausedbyfusionofashandsilica.Atthesametime,ablankdeterminationwasdonetakingthesamevolumeofthesolutionofmagnesiumacetate.Todeterminethesilicacontentinash,theashresidueobtainedabovewastreatedtwotimeswithconcentratedHCl36,asreceivedtoremoveacidsolubleinorganicsalts.Theacidinsolubleresiduewasfiltered,washedwithhotwateruntilnochloridesweredetectablewithAgNO3,ignited,andfinallyweighedassilicondioxide.2.5.EstimationofacetylgroupsinaceticacidpulpandligninAceticacidpulp60mgoraceticacidlignin50mgwassuspendedordissolvedin6mlof1MNaOH.Propionicacid10mgwasaddedasaninternalstandard.Themixturewassaponifiedat60C176Cinawaterbathwithshakingfor2h.Aftersaponification,thepHofthemixturewasadjustedbelow2withhydrochloricacid/water11,v/v.AceticacidinthesupernatantwasdeterminedbygaschromatographyGCconditionscolumnGaschropak55,columntemperature170C176C,injectiontemperature250C176C,carriergasN2ataflow1258S.Kim,Y.Sano/Bioresourcerateof30ml/min,FIDdetector.Acetylgroupsinaceticacidpulpandligninwerecalculatedfromtheamountofaceticaciddeterminedabove.2.6.PhysicalpropertiesofaceticacidpulpandchemicalanalysisThestrengthpropertytestsofpulphandsheetswereperformedaccordingtoTAPPIT220sp96.PulpviscositywasexaminedusingTAPPIT230om99.SolventextractivesweredeterminedusingTAPPIT204cm97.ColdandhotwatersolublesweredeterminedusingTAPPIT207cm99.Alkali1NaOHsolubleswerequantifiedaccordingtoTAPPIT212om98.KlasonligninwasdeterminedaccordingtoTAPPIT222.AcidsolubleligninwasdeterminedbyUVspectraasdescribedbyDence1992.Nitrogencontentwasdeterminedbyelementaryanalysis.Carbohydrateinwheatstraw,pulp,andwatersolubleswasanalyzedbygaschromatographyaccordingtoalditolacetatesmethodofBorchardtandPiper.EstimationofligninmolecularweightAfteracetylationtomakeligninsolubleinmobilephase,theaveragemolecularweightofaceticacidligninwasestimatedbysizeexclusionchromatographyonanHPLCsystem625LCsystem,WatersCorporation,Milford,Massachusetts,USAwithShodexKFG,802and803columnsShowaDenko,Tokyo,Japan.Thecolumnswerecalibratedwithauthenticpolystyrene.Theligninacetate10mgwasdissolvedin1mloftetrahydrofuranTHFwithoutstabilizer,andthesolutionwasfiltratedthrough0.2lmsyringefilterpriortoinjection.Asampleof10llwasloadedoncolumns.THFwasusedasaneluentataflowrateof0.5ml/min.Columntemperaturewas40C176C.2.8.ThermomechanicalanalysisTMAofligninThermomechanicalanalysisofligninwasperformedonaThermalAnalyzermodel010,MACSCIENCE,Hachioji,Japanusingamethodbasedonchangesinsamplevolumeafterheating,asdescribedbyKuboetal..ExperimentaldataAceticacidpulpingresultsrepresentthemeanofthreereplicatebatches.Bleachingwasperformedinduplicate.Physicalstrengthresultsofpulphandsheetsaretheaverageof10measurements.Otheranalyseswereconductedinduplicate.Allresultsreportedinthepresentresearcharemeanvalve±standarddeviationSD.StandarddeviationwascalculatedusingOrigin6.0softwareMicrocalSoftware,Inc.,USAaccording–1263toSDdefinitionMasonetal.,1989.
编号：267594 && 大小：568.15KB && 格式：PDF && 上传时间：
<a href="UserManage/CopyrightAppeal.aspx?bid=137594" title="版权申诉" class="fLeft works-manage-item works-manage-report" target="_blank"
关&键&词： 外文 翻译 通过 常压 醋酸 工艺 分馏 小麦 秸秆 英文
& 毕设资料网所有资源均是用户自行上传分享，未经上传用户书面授权，请勿作他用。
毕设资料网让我在短期内完成了毕业设计
本人亲自经历过的毕业答辩之路
毕业答辩完成了，好好反思自己今后要走的路
毕业答辩该注意些什么？？--我所经历的一波三折的答辩
毕业答辩注意事项，关于毕业答辩二三事
06至07年度我校社会实践工作概况
2007年暑期社会实践总结
2007年暑期夏令营活动总结
2007年暑期社会实践总结材料
安县银河水泥厂认识实习报告
材料专业毕业实习（无机材料方向）-教学大纲
大学暑期社会实践活动重点团队现场招聘大会的通知
多路输出直流稳压电源课程设计
飞机定票系统C语言课程设计
钢筋混凝土单向板肋梁楼盖课程设计
工资管理信息系统课程设计
电子课程设计--函数信号发生器
毕业论文---中小企业财务管理效率的路径探讨
毕业设计(论文)-35KV煤矿供电系统设计
毕业设计（论文）-基于AT89C51单片机的步进电机控制系统
工程监理毕业论文
基于单片机的电子血压计毕业论文开题报告
火车票订票系统毕业设计论文
计算机网络技术毕业论文---论某高校校园网络的建设与规划
220KV变电站电气部分毕业设计
HDI多层电路板生产线环评毕业设计
photoshop广告设计毕业设计--创意广告设计
plc交通灯设计(毕业设计)
PLC控制毕业设计---基于PLC控制的自动供料及加工系统设计
毕业设计---MP3播放器的设计与实现
110kv变电站设计外文翻译--一种实用的输配电系统的维护优化计划
android毕业设计外文资料翻译
本文标题：外文翻译--通过常压醋酸工艺分馏小麦秸秆（英文） 链接地址：
当前资源信息
浏览：81次
&& && && && && && && && && &&
copyright@
毕设资料网网站版权所有 本站所有资料均属于原创者所有，仅提供参考和学习交流之用，请勿用做其他用途，转载必究！如有侵犯您的权利请联系本站，一经查实我们会立即删除相关内容! 举报电话： 举报邮箱： 网站备案号：当前位置： &
dse中文是什么意思
中文翻译或数据转换交换全面安全防护数字交换机, 分布式系统环境数字特技索尼数码相机系列〖标牌资料交换设备&&&&德西埃... &&&&&&米乐贸易有限公司... &&&&&&工程学博士... &&&&&&用户数据协议... &&&&&&数据存储装置... &&&&&&数据交换设备... &&&&&&数据交换机; 数据交换交换局（英国）... &&&&&&数字选择发送器... &&&&&&数字特技... &&&&&&数字存储设备... &&&&&&数字交换单元... &&&&&&数字化外形编辑... &&&&&&直接交换设备... &&&&&&直接交换交换局... &&&&&&分布式系统环境... &&&&&&加压超声心动图描记术... &&&&&&杜比数字环绕声... &&&&&&DSE(缩写) ... &&&&&&动态支持程序... &&&&&&字存储设备 ... &&&&&&电动式扬声器... &&&&&&朵思大王; 思大王... &&&&&&数据信号显示单元... &&&&&&变形成像存储显示管... &&
例句与用法Dse dolby surround digital杜比数字环绕声Dse digitized shape editor数字化外形编辑Dse ( driving start engine ) is a marketing consulting and execution company , focusing on the product promotion , marketing consulting , solution creating & training and other relative marketing work启动力（北京）咨询有限责任公司是一家专业致力于整合式市场行销的公司，公司主要从事不同产品的推广、策划、培训、咨询、服务与销售等市场行销性工作。 After analyzing the advantages and the disadvantages of dse arithmetic and rsa arithmetic , which are both representatives of the traditional cryptogram systems , put forward a model of network data safety system combined two arithmetic在分析对称密码体制和公开密钥体制的代表dse和rsa算法的优缺点后，提出将两种算法结合的网络数据安全系统的模型。 &&
相邻词汇热门词汇
dse的中文翻译，dse是什么意思，怎么用汉语翻译dse，dse的中文意思，，，，发音，例句，用法和解释由查查在线词典提供，版权所有违者必究。
&&&&&&&&&&&&&&&&
Copyright &
(京ICP备号)
All rights reserved英文翻译_图文_百度文库
赠送免券下载特权
10W篇文档免费专享
部分付费文档8折起
每天抽奖多种福利
两大类热门资源免费畅读
续费一年阅读会员，立省24元！
阅读已结束，下载本文需要
想免费下载更多文档？
定制HR最喜欢的简历
下载文档到电脑，同时保存到云知识，更方便管理
&#xe64e;加入VIP
还剩7页未读，
定制HR最喜欢的简历
你可能喜欢您要找的是不是:
n. 剂量；一剂，一服 | vi. 服药 | vt. ...
abbr. 数据存贮设备（Data Storage Equipment）
中学文凭试
中学文凭试(DSE)是高中生的梦魇，即使这是很多学生..
基于404个网页-
全面安全防护
生活就像拉屎，有时候你真的很努力，可得到的往往是一个屁，别抱怨，除了继续努力别无选择 ... SAHR 主动式安全头枕 DSE 全面安全防护 EES 座椅自动调节系统 ...
基于348个网页-
...，用DSE成绩申请内地各高校。由于历史原因，香港和大陆的基础教育不甚相同，不仅所学内容，且考察侧重点也不尽相同，如某香港籍学生接受的是大陆背景的基础教育，冒然参加和自己平时学习和练习风格迥异的香港文凭试（DSE）,在起点上就已经比从小接受香港本土基础教育的学生差一截，其竞争力可想而知。
基于232个网页-
然而检查需要进行局部麻醉及动脉穿刺等操作,常常使患者产生恐惧,不易接受,而多巴酚丁胺超声心电图负荷试验(DSE)和平板运动心电图负荷试验(TET)作为目前诊断冠心病的方法具有无创,费用低等优点
基于194个网页-
最终温书策略
全面安全防护
数据交换设备
数据交换交换局
和小剂量多巴酚丁胺负荷心脏超声
米乐贸易有限公司
数字交换单元
数字存储设备
更多收起网络短语
全面安全防护
数据交换设备
资料集扩充 (data set extension)
资料交换中心 (data switching exchange)
&2,447,543篇论文数据，部分数据来源于
Dermatan-sulfate epimerase is an enzyme that in humans is encoded by the DSE gene.
以上来源于:
data-storage equipment 【计算机】数据存储设备
以上来源于：《21世纪大英汉词典》
Existing XAware BizDrivers are imported into the DSE, letting you connect to and view database catalogs and tables.
现有的XAware BizDrivers被导入到了DSE中，这使你可以连接并查看数据库及表。
The multi-user detection based on MDSE-CMA can achieve faster convergence than DSE-CMA.
基于该算法的多用户检测方法与DSE-CMA算法相比，收敛速度加快。
In this paper, we firstly introduce briefly the DS equation (DSE) formalism and then use the DS approach in two aspects of non- perturbative studies.
在本工作中，我们首先简要介绍DS方程的方法，接着将其应用到非微扰问题研究的两个方面。
You can play with the eBay DSE dashboard which displays static performance data for the entire year of 2012 or for individual quarters.
$firstVoiceSent
- 来自原声例句
请问您想要如何调整此模块？
感谢您的反馈，我们会尽快进行适当修改！
请问您想要如何调整此模块？
感谢您的反馈，我们会尽快进行适当修改！网页版学习工具
fusibility scale是什么意思及反义词
沪江词库精选fusibility scale是什么意思、英语单词推荐
Large-major pooling of efforts
A thin scalelike or platelike structure,as one of the thin layers of sensitive vascular tissue in the hoof of a horse.
蹄叶一种细小的鳞状或片状结构，如马蹄子上敏感的管状组织的细小薄片
The girls were providing themselves with weapons now, but apparently they had no serious intention of starting a full-scale battle
女工们也有武器了，但显然还没有正式作战的意思。
Linear Scale Controller
线性缩放控制器
&For variety, composers occasionally use notes and chords from keys or scales other than this is called chromaticism.&
为使作品变化丰富，作曲家有时将同一调子或音阶中次要的音符及和弦用在作品中，这便是半音体系。
&Very large-scale integration (VLSI) vastly increased circuit density, giving rise to the microprocessor.&
大规模集成电路更大的增加了微处理器的电路密度。
corrosion inhibition?
腐植酸,共混,阻垢,缓蚀
&In the absence of a bullet puller and scales, the competitor's declared bullet weight may be used. &
在没有拔弹头器及秤的情形之下,得以使用选手所申报的弹头重量。
&Though classical mechanics fails on the scale of atoms and molecules, it remains the framework for much of modern science and technology.&
虽然经典力学不能解释原子和分子尺度的情况，但它还是多数现代科学和技术的基本框架
At this stage, their scales fall off.
在这个阶段，它们的鳞片脱落。
匀称的,恰如其分的,协调的
与…成比例,与…相称
按…比例,以…规模
n. 熔性,熔度
n. 比例,刻度,衡量,比例尺,数值范围,等级,规模,天平,秤盘,秤,鳞,鳞片,积垢
1.[C]鳞；鳞片
2.[C]鳞状物；（尤指皮肤的）鳞屑.
3.[U] 水锈，水垢；牙垢.
4.[C]标度；刻度有刻度的量具
5.[C]量度制；进位制
6.[C]等级；级别
鳞斑,鳞状脱皮
a. 大规模的
放大比例尺
无氧化皮,不起皮
大规模的,工业规模的
无主物（拉丁文）
phr. 隆头鱼
工人寄宿处
phr. 锯盖鱼科的典型属
节日包裹焦虑症（指因为没收到本该在圣诞节前送到的某件网购物品而感到焦虑不安的心理。）}