简介：氨(NH3)挥发在土壤headspace是在碱的土壤，和NH3集中的氮损失的重要小径之一直接与NH3挥发被连接。氨被Fourier变换描绘中间红外线的photoacoustic光谱学(FTIR舞步)和在8501200厘米1的区域的二个典型吸收乐队被观察，它能在土壤headspace被用于NH3集中的预言。从诺思中国的碱的土壤在三个授精处理(没有N输入(CK)的控制，脲和涂的脲)下面涉及土壤孵化，壶和地实验。在土壤headspace的氨集中在每个实验被决定。在土壤孵化实验，NH3排出物被N输入开始，在白天2上到达了最高的集中，并且减少了到在在8d以后的CK测量了的水平，与在与涂的脲处理相比的脲处理的显著地更高的NH3排出物，特别在开始的4d期间。在壶实验的土壤headspace的NH3集中在孵化实验作为那显示出类似的动力学；然而，在在地实验的土壤headspace的NH3集中孵化和壶实验与那些表明了一个显著地不同的排放模式，并且为NH3集中有4-d延期。因此，在孵化的NH3集中和壶实验不能直接被用来象土壤温度和土壤骚乱一样在授精方法和申请率由于差别在这块地里为真实NH3排放建模。在控制版本的授精和参与以后在第二个星期内点亮灌溉，这被推荐涂的脲能被用来显著地减少从NH3挥发的观点的N损失。

简介：Previousstudieshaveshownthatbaicalinpreventedironaccumulationaftersubstantianigrainjury,reduceddivalentmetaltransporter1expression,andincreasedferroportin1expressioninthesubstantianigraofrotenone-inducedParkinson’sdiseaserats.Inthecurrentstudy,weinvestigatedtherelationshipbetweenironaccumulationandtransferrinexpressioninC6cells,toexplorethemechanismsoftheinhibitoryeffectofbaicalinonironaccumulationobservedinParkinson’sdiseaserats.Ironcontentwasdetectedusinginductivelycoupledplasma-atomicemissionspectroscopy.Resultsshowedthatironcontentdecreased41%afterblockingdivalentmetaltransporter1andferroportin1proteins.Aftertreatmentwithferricammoniumcitrateofdifferingconcentrations(10,50,100,400μg/mL)inC6gliomacells,cellsurvivalrateandferroportin1expressionwerenegativelycorrelatedwithferricammoniumcitrateconcentration,butdivalentmetaltransporter1expressionpositivelycorrelatedwithferricammoniumcitrateconcentration.Baicalinordeferoxaminereduceddivalentmetaltransporter1expression,butincreasedferroportin1expressioninthe100μg/mLferricammoniumcitrate-loadedC6cells.Theseresultsindicatethatbaicalindown-regulatedironconcentration,whichpositivelyregulateddivalentmetaltransporter1expressionandnegativelyregulatedferroportin1expression,anddecreasedironaccumulationinthesubstantianigra.

简介：Forthegoalofsulfurrecovery,mostmethodsareaimedatthetailgaswithhigh-concentrationH2S,butfeweffectivemethodsareusedforlow-concentrationH2S.Inthiswork,Low-concentrationH2Scouldbepurifiedwellbyliquidphasecatalyticoxidation(LCO),andthesulfurresourcecouldalsoberecovered.TheabsorptionsolutionwaspreparedbyFeCl3andsulfosalicylicacid.Undertheexperimentalconditions,theconversionofH2StoScouldbemaintainedabove94%at60℃.InordertoenhancetheeconomicalefficiencyofLCOmethod,theabsorptionsolutionwasmodifiedbydopingCe,andaseriesofexperimentsweredesignedtoinvestigateitsperformance.TheresultsshowedthattheconversionofH2Shadnoobviousimprovement,butabove98%conversioncouldbegainedat60℃,andtheH2Sconversionratewasenhanced.TheoptimumadditionqualityofCe(NO3)3was0.08gto50mlFe3+solution.

简介：Thedistributionandchemicalpropertiesofcoloreddissolvedorganicmatter(CDOM)intheYellowSeaandtheEastChinaSeaduringDecember2011-January2012wereinvestigated.TheinputoffreshwaterandbiologicalactivitieshadanevidentinfluenceontheCDOMlevels(characterizedbythelightabsorptioncoefficientatthewavelengthof355nma355)inthestudyarea.ThespatialdistributionofCDOMlevelsdisplayedagraduallydecreasingtrendfromthecoastalwaters(0.37m^-1)totheopensea(0.18m^-1).Thespectralsloperatio(thesloperatioSRdefinedasS275-295:S350-400)duringthecruisewascorrelatedwithsalinity,andexhibitedalargevariationfrominshore(averageof2.515)tooffshoresites(averageof5.327)comparedwiththedistributionofa355.ThevaluesofSRwererelatedtoCDOMmolecularweight(MW).Thea355,SR,andchlorophyllain37samplescollectedfromthesurfacemicrolayerweresignificantlycorrelatedwiththoseinthecorrespondingsubsurfacewatersamples,implyingastrongexchangeactionbetweenthemicrolayerandbulkwater.Thea355andSRofCDOMexhibitedsignificantmicrolayerenrichment,withmeanenrichmentfactors(EFs)of1.72and1.62,respectively.

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简介：Agreenprocessfortheoxygen-freeconversionofmethanetohigh-concentrationethyleneandhydrogeninaplasina-followed-by-catalyst(PFC)reactorispresented.Withoutanycatalystsandwithpuremethaneusedasthefeedgas,astablekilohertzsparkdischargeleadstoanacetyleneyieldof64.1%,ethyleneyieldof2.5%andhydrogenyieldof59.0%with80.0%ofmethaneconversionatamethaneflowrateof50cm~3/minandaspecificinputenergyof38.4kJ/L.Intheeffluentgasfromastablekilohertzsparkdischargereactor,theconcentrationsofacetylene,ethyleneandhydrogenwere18.1%,0.7%and66.9%,respectively.WhencatalystsPd-Ag/Si02wereemployedinthesecondstagewithdischargeconditionssameasinthecaseofplasmaalone,thePFCreactorprovidesanethyleneyieldof52.1%andhydrogenyieldof43.4%.TheconcentrationsofethyleneandhydrogenintheeffluentgasfromthePFCreactorwerefoundtobeashighas17.1%and62.6%,respectively.Moreover,noacetylenewasdetectedintheeffluentgas.Thismeansthatahighconcentrationofethyleneandoxygen-freehydrogencanbeco-produceddirectlyfrommethaneinthePFCreactor.

简介：在西安，长期的变化和关系从2001-2004基于从1980-2002获得的每日的可见性数据和空气污染索引数据因为每天水平的扑灭系数和PM_(10)的集体集中被评估了。一个减少的趋势在过去的23年期间在水平扑灭系数被发现，与更高的价值相对1990年代的观察in1980s，和在冬季和夏天的最高、最低的价值分别地。重要关联和类似的季节的变化在水平扑灭系数和PM_(10)集中之间存在，建议到在在在过去的二十年期间的华中的Guanzhong平原的一个地点的可见性落下的PM_(10)的高影响。

简介：由有固有的技巧此处，在房间膜上与高度选择的离子隧道和泵在液体从盐内容产生可观的bioelectricity的生物系统启发了一只充分不能生活的、单个杯子圆锥形的nanopores收获精力被表明。圆锥形的nanopores被显示出被取决于离子散开的方向的电解质集中坡度控制的否定地控告的玻璃里的离子当前的校正(ICR)。ICR的度与向前增加被提高集中差别。当集中坡度相对地被使用时，不平常的校正倒置被观察。有单个nanopore的最大的力量产量接近104 pW。这个灵巧、成本效率的收获精力的系统有潜力驱动干净精力的恢复种的微小的生物医学的设备或构造未来。

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简介：Severalstudieshavedemonstratedthattheamountofbeta-amyloid(Aβ)proteininthebraincanbeloweredbydown-regulatingAβproduction,promotingAβdegradation,reducingAβoligomerizationordeposition,therebyalleviatingsymptomsofAlzheimer'sdisease.Curcuminhasbeenknowntobeaperoxisomeproliferatoractivatedreceptorgamma(PPARγ)agonistandcanobviouslyinhibitAβproductionandoligomerization.Thisstudyinvestigatedtheeffectsofcurcuminontheβ-siteAPPcleavingenzyme1(BACE1)activityandPPARγexpressioninhumanneuroblastomaSH-SY5Ycells,andvalidatedtheinhibitoryeffectsofcurcuminonAβ40/42expressioninthebrain.ResultsrevealedthatPPARγmRNAandproteinexpressioninthehumanneuroblastomaSH-SY5Ycellssignificantlyincreasedwithincreasingcurcuminconcentrationandtimecourse(P<0.05);BACE1mRNAandproteinexpressionandAβ40/42productionsignificantlydecreasedwithincreasingcurcuminconcentrationandtimecourse(P<0.05).ThechangesinPPARγandBACE1expressionduringAβproductioncouldbereversedbythePPARγantagonistGW9662.ThesefindingsindicatethatcurcuminreducedAβproductionbyactivatingPPARγexpressionandinhibitingBACE1expressioninaconcentration-andtime-dependentmanner.

简介：把土壤的侵蚀基于降雨并且在暴风雨事件推迟了沉积运输，一个方法被建议预言山峰推迟了沉积集中并且在山峰降雨以前基于降雨特征在分水岭推迟了沉积产量紧张。统治的降雨特征因素达到顶点推迟的沉积集中Cp是降雨侵蚀因素裁判员，区域一般水准降雨ip1的第一山峰降雨紧张和先前的降水索引Iap；在暴风雨事件统治推迟的沉积收益Yss的降雨特征因素是全部的降雨P，推迟的沉积收益因素Rsf和前身降水索引Iap。这研究作为研究目标在南部的台湾沿着Lao-Nung河在Liau-Kwei观察车站集中于分水岭，并且采用PSED模型为分析在11个暴风雨事件模仿分泌物自记水位计，推迟的沉积集中自记水位计和推迟的沉积产量。分析结果证明在之间有好关联上述象被使用表情(13)并且(要预言的Yss，这样创新的Cp和Yss一样的降雨特征因素和Cp14)。这二表情被利用在2009预言台风Morakot的Cp和Yss，并且结果与从由使用PSED模型的模拟的那些相比。在那里的比较表演的结果是在预言的一个好能力。为为水资源设备的有效操作的利益预言一个暴风雨事件的Cp和Yss是必要的分水岭，上述的降雨特征因素能被利用为预言建立适用的模型。

简介：ObjectiveTheMiao’ershan–Yuechenglingcompositegranite,locatedinnorthernGuangxiatthewesternsectionoftheNanlingRange,isamulti-periodandmulti-stagecompositeplutonwithanexposedareaofmorethan3000km2(Fig.1).PaleozoicandProterozoicstrataareexposedaroundit,andmagmaticactivitiesmainlyoccurredduring

简介：AbstractBackground:Since the diagnostic value of aldosterone to renin ratio (ARR) calculated by plasma renin concentration (PRC) or plasma renin activity (PRA) is still inconclusive, we conducted a meta-analysis by systematically reviewing relevant literature to explore the difference in the diagnostic efficacy of ARR calculated by PRC or PRA, so as to provide guidance for clinical diagnosis.Methods:We searched PubMed, Embase, and Cochrane Library from the establishment of the database to March 2021. We included studies that report the true positive, false positive, true negative, and false negative values for the diagnosis of primary aldosteronism, and we excluded duplicate publications, research without full text, incomplete information, or inability to conduct data extraction, animal experiments, reviews, and systematic reviews. STATA 15.1 was used to analyze the data.Results:The pooled results showed that ARR (plasma aldosterone concentration [PAC]/PRC) had a sensitivity of 0.82 (95% confidence interval [CI]: 0.78-0.86), a specificity of 0.94 (95% CI: 0.92-0.95), a positive-likelihood ratio (LR) of 12.77 (95% CI: 7.04-23.73), a negative LR of 0.11 (95% CI: 0.07-0.17), and symmetric area under the curve (SAUC) of 0.982, respectively. Furthermore, the diagnostic odds ratio (DOR) of ARR (PAC/PRC) was 180.21. Additionally, the pooled results showed that ARR (PAC/PRA) had a sensitivity of 0.91 (95% CI: 0.86-0.95), a specificity of 0.91 (95% CI: 0.90-0.93), a positive LR of 7.30 (95% CI: 2.99-17.99), a negative LR of 0.10 (95% CI: 0.04-0.26), and SAUC of 0.976, respectively. The DOR of ARR (PAC/PRA) was 155.52. Additionally, we conducted a subgroup analysis for the different thresholds (<35 or ≥35) of PAC/PRC. The results showed that the DOR of the cut-off ≥35 groups was higher than the cut-off <35 groups (DOR = 340.15, 95% CI: 38.32-3019.66; DOR= 116.40, 95% CI = 23.28-581.92).Conclusions:The research results suggest that the determination of ARR (PAC/PRC) and ARR (PAC/PRA) was all effective screening tools for PA. The diagnostic accuracy and diagnostic value of ARR (PAC/PRC) are higher than ARR (PAC/PRA). In addition, within a certain range, the higher the threshold, the better the diagnostic value.

简介：Aluminum,themainimpurityinthelixiviumofweatheredcrustelutiondepositedrareearthore,notonlyresultsinanincreasingconsumptionofprecipitantintherareearthprecipitationprocess,butalsolowersthepurityoffinalrareearthproduct.Aluminumintheweatheredcrustelution-depositedrareearthorelixiviumshouldberemoved.Neutralizinghydrolysismethodwasemployedtoremovealuminumfromthelixivium.HexamethylenetetraminewasfoundtobetheoptimumpHregulatorfortheremovalofaluminuminthelowconcentration.WhenusedtoadjustthepHvalueofthelixiviumto5.0,aluminuminthelixiviumcanbeeffectivelyremovedintheformofaluminumhydroxideprecipitationwithremovalrateof97.60%.Itshowsthathexamethylenetetraminehasagoodeffectontheremovingofaluminumionsfromthelowconcentrationlixivium.Moreover,hexamethylenetetramineinremovingaluminumfromlixiviumhaslittleadverseeffectontheREprecipitationprocess.

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简介：ViathevaluableopportunityoftheThreeGorgesReservoir(TGR)135-mfillinginJune2003,theYangtzedischargeandsuspendedsedimentconcentration(SSC)enteringtheestuaryduringtheperiodfrom15Mayto15July2003wereanalyzedtoexaminetheinstanteffectsofthefillingonthem.TheYangtzedischargeandSSCenteringtheestuaryintheperiodsbefore,duringandafterthefillingclearlyindicatedthreephases:1)thepre-storagephasecharacterizedbynaturalconditions,inwhichtheSSCincreasedwithincreasingwaterdischarge;2)thestoragephase,duringwhichtheSSCdecreaseddramaticallywithdecreasingwaterdischarge;and3)thepost-storagephase,duringwhichboththeSSCandwaterdischargeremainedatrelativelylowlevelsfirstuntiltheendofJune,thentheSSCincreasedgraduallywithincreasingwaterdischarge.ItseemsthatthetimesfortheinstanteffectsofthedecreasingdischargedownstreamfromtheupperYangtzeontheYangtzedischargeandSSCenteringtheestuaryduetotheTGR135-mfillingtotakeplacewereabout5dand1drespectively,whilebothwereabout18dforthoseoftheincreasingdischarge.Thisprobablyreflectsthebufferingandresultantlyhysteresisofthe1800-kmstretchfromtheupperYangtzetotheestuary.TheresultsarehelpfulforscientificandhydrologicalinvestigationoftheYangtzemainstreamdownstreamfromtheTGRDamandoftheestuarineandadjacentcoastalwaters.

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简介：BackgroundTotheeffectofpercutaneouscoronaryintervention(PCI)onplasmalevelofN-terminalpro-Btypenatriureticpeptide(NT-proBNP)inpatientswithcoronaryheartdisease(CHD)andnormalleftventricularfunction.MethodsOnehundredandfivepatientswithCHDandnormalventricularfunctionwereenrolled.BloodsamplesforassessmentofNT-proBNPandcTn-TwerecollectedbeforeandafterPCI.ResultsThemeanleftventricularejectionfractionwas60.3±5.3%.Afterrevascularization,theleveloflgNT-proBNPwassignificantlyreduced(2.40±0.44vs2.23±0.43,P<0.001).SubgroupanalysisshowedthattheleveloflgNT-proBNPwasconsistentlydecreasedindifferentclinicalclassifications(stableangina45,unstableangina31andacutemyocardialinfarction29)andtarget-vesselrevascularization(leftanteriordescendingartery30,leftcircumflexartery26andrightcoronaryartery49),andin99patientswithoutelevationofpost-proceduralcTnT,butitshowedatrendofnon-significantincreasein6patientswithelevatedcTn-T.ConclusionsOurstudydemonstratesthatsuccessfulPCIreducesplasmaNT-proBNPconcentrationinpatientswithCHDandnormalventricularfunction.ThisimplicatesthattheimpactofPCIshouldbeconsideredintheinterpretationofNT-proBNPchangeinclinicalpractice,andfurtherstudiesarenecessarytoinvestigatethedirectand/orindirecteffectofmyocardialischemiaonBNP/NT-proBNP.