学科分类
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23 个结果
  • 简介:与连续、慢的氧版本特征,过氧化钙(CaO_2)是在污染地下水的简历补习为氧气的微生物供应氧的新来源。批实验被进行评估在包含CaO_2的媒介与水,高酸碱值的规定,以及混合氧气的微生物的生长反应的氧版本率ofCaO_2。结果证明氧版本CaO_2comprises处理三个阶段。当CaO_2的增加的重量增加了,在第一个阶段,严厉地增加的水的溶解的氧层次,和一般水准,氧版本率增加了。然而,率几乎在后者阶段保持不变并且是约0.48和0.084mgO_2?h~(-1),分别地。作为媒介,钾dihydrogen磷酸盐(KH_2PO_4)和硫酸铵的必要部件((NH_4)_2SO_4)能在某个比率调整CaO_2from12.1引起到6.5的范围的酸碱值-8.5,它对微生物引起的生长有用。另外,在包含CaO_2的媒介观察的diauxicgrowth曲线建议混合氧气的微生物的生长能被CaO_2的增加刺激。

  • 标签: 生物治疗 过氧化钙 溶解氧 pH值 生长曲线 好氧微生物
  • 简介:不同于另外的粪甲壳虫,伊比利亚人geotrupid,Thorecteslusitanicus,展览杂食的行为;例如,它能除了不同哺乳动物的粪吃橡树子,真菌,水果,和腐朽。消化一本更宽的食谱的这改编有生理、发展的优点并且在甲壳虫的内脏microbiota的作文和差异要求关键变化。在这研究,我们孤立氧气,容许厌氧,并且顺从的aerotolerantmicrobiotaT满足从内脏在文化成长。lusitanicus并且解决由定序16SrRNA基因碎片孤立身份到种类水平。用强风类似搜索和最大的可能性的种系发生的分析,我们能表明分析部分(culturable,氧气,容许厌氧,并且aerotolerant)甲壳虫勇气,microbiota被数Proteobacteria,Firmicutes,和Actinobacteria统治。在Proteobacteria之中,顺序Enterobacteriales(Gammaproteobacteria)的成员是最丰富的。与细菌联系的主要功能在T的内脏发现了。lusitanicus将多半对病原体包括氮固定,denitrification,detoxification,和多样的防御角色。

  • 标签: 肠道菌群 耐氧 培养 系统发育分析 兼性厌氧菌 蜣螂
  • 简介:AerobicricetechnologyisstillnewinMalaysia,andinformationregardingMARDIAerob1(MA1),thefirstlocalaerobicricevariety,isstilllacking.Therefore,comparativestudieswerecarriedouttodeterminethephysiologicalperformanceofaerobicricevarietyMA1andlowlandricevarietyMR253underwaterstressgivenatthepanicleinitiation,floweringandripeningstages.Thisexperimentwasarrangedinarandomizedcompleteblockdesign.Stomatalconductance(gs),chlorophyllafluorescence(Fv/Fm),leafrelativewatercontent(leafRWC),andsoilmoisturecontent(SMC)aswellasyieldcomponentparameterssuchaspaniclenumber,grainyieldand100-grainweightweremeasured.ResultsrevealedthatgsandleafRWCforbothvarietiesdecreasedwithdepletionofSMC.ThecorrelationstudybetweenthephysiologicalparametersandSMCindicatedthatFv/Fmwasnotaffectedbywaterstress,regardlessofvarieties.Theyieldcomponents(paniclenumber,grainyieldand100-grainweight)forbothvarietiesgreatlydecreasedwhenwaterstresswasimposedatthepanicleinitiationstage.Thisstudyshowedthatthepanicleinitiationperiodwasthemostsensitivestagetowaterstressthatcontributedtoasubstantialreductioninyieldforbothvarieties.Undertheaerobiccondition(control),MR253producedhigherpaniclenumber,100-grainweightandyieldthanMA1.AlthoughMR253isbredforlowland,itiswelladaptedtoaerobiccondition.

  • 标签: WATER stress STOMATAL CONDUCTANCE CHLOROPHYLL a
  • 简介:Purpose:ThepurposeofthisstudywastoinvestigatetheimpactofacuteexerciseonreactiontimeandresponsepreparationduringaGo/NoGoTaskinchildrenwithattentiondeficithyperactivitydisorder(ADHD).Methods:NineteenchildrenwithADHD(agedbetween8and12yearsold)undertooka30-mininterventionthatconsistedoftreadmillrunningorvideo-watchingpresentedinacounterbalancedorderondifferentdays.AGo/NoGoTaskwasadministratedafterexerciseorvideo-watching.Results:Theresultsindicatedashorterreactiontimeandsmallercontingentnegativevariation(CNV)2amplitudefollowingexerciserelativetothevideo-watching.Foreventrelatedpotential(ERP)analyses,greaterCNV1andCNV2amplitudesinresponsetoNoGostimuliincomparisontoGostimuliwasobservedinthevideo-watchingsessiononly.Conclusion:ThesefindingssuggestthatacuteexercisemaybenefitchildrenwithADHDbydevelopingappropriateresponsepreparation,particularlyinmaintainingastablemotorpreparatorysetpriortoperformingthegiventask.

  • 标签: 儿童多动症 有氧运动 ERP 急性 反应时间 事件相关电位
  • 简介:Purpose:Thepurposeofthisstudywastodeterminetheeffectsofacuteexerciseonmotorresponseinhibitionusingbothbehavioralandelectrophysiologicalapproaches.Methods:TheP3andN1event-relatedpotential(ERP)componentswererecordedwhileperformingastop-signaltaskin21collegestudentsfollowingamoderatelyintenseacuteexerciseboutfor30minandasedentarycontrolsessionthatinvolvedreading.Results:Acuteexerciseinducedashorterstopsignalresponsetime(SSRT)ascomparedtocontrol;however,thegoresponsetime(GoRT)remainedunchanged.InexaminingtheERPdata,acuteexerciseincreasedbothP3amplitudeandlatencybutdidnotaffecttheN1component.Conclusion:Acuteexercisehasaselectiveandbeneficialeffectoncognitivefunction,specificallyaffectingthemotorresponseinhibitionaspectofexecutivefunction.Furthermore,acuteexercisepredominatelyimpactslaterstagesofinformationprocessingduringmotorresponseinhibition,whichmayleadtoanincreaseinattentionalresourceallocationandconfertheabilitytosuccessfullywithholdaresponsetoachievemotorresponseinhibition.

  • 标签: 运动反应 停止信号 ERP 急性 有氧运动 信号响应时间
  • 简介:Theaerobicoxidationofglycerolprovidesaneconomicallyviableroutetoglyceraldehyde,dihydroxyacetoneandglycericacidwithversatileapplications,forwhichmonometallicPt,AuandPdandbimetallicAu–Pt,Au–PdandPt–PdcatalystsonTiO2wereexaminedunderbase-freeconditions.PtexhibitedasuperioractivityrelativetoPd,andAu–PdandPt–PdwhileAuwasessentiallyinactive.ThepresenceofAuontheAu–Pt/TiO2catalystsledtotheirhigheractivities(normalizedperPtatom)inawiderangeofAu/Ptatomicratios(i.e.1/3–7/1),andtheonewiththeAu/Ptratioof3/1exhibitedthehighestactivity.SuchpromotingeffectisascribedtotheincreasedelectrondensityonPtviatheelectrontransferfromAutoPt,ascharacterizedbythetemperature-programmeddesorptionofCOandinfra-redspectroscopyforCOadsorption.Meanwhile,thepresenceofAuonAu–Pt/TiO2,mostlikeduetotheobservedelectrontransfer,changedtheproductselectivity,andfacilitatedtheoxidationofthesecondaryhydroxylgroupsinglycerol,leadingtothefavorableformationofdihydroxyacetoneoverglyceraldehydeandglycericacidthatwerederivedfromtheoxidationoftheprimaryhydroxylgroups.ThesynergeticeffectbetweenAuandPtdemonstratesthefeasibilityintheefficientoxidationofglyceroltothetargetedproducts,forexample,byrationaltuningoftheelectronicpropertiesofmetalcatalysts.

  • 标签: 铂催化剂 二氧化钛 双金属 游离氧 铂钯催化剂 二羟基丙酮
  • 简介:Alow-costandeasilypreparedmanganesecarbonate(MnCO3)hasbeensynthesizedforcatalyticconversionof5-hydroxymethylfurfural(5-HMF)to2,5-diformylfuran(DFF).ThepropertiesandmorphologyofthemanganesecarbonateweremeasuredbySEM,XRD,TGA,BETandXPS.Inthismethod,noharshreactionconditionswererequired,anditwasasimpleandgreenprocessfortheoxidationof5-HMFintoDFF.ToachieveanoptimumDFFyield,differentreactionconditions,includingreactiontemperature,reactiontime,catalystamount,andsolventswereinvestigated.ResultsfromtheexperimentsindicatedthatthehighestDFFyieldof86.9%wasobtainedat120°Cunderatmosphericoxygenpressureafter6h.Finally,MnCO3couldbeusedatleastfivetimeswithconsiderablestability.

  • 标签: 5-HYDROXYMETHYLFURFURAL 2 5-Diformylfuran MANGANESE CARBONATE Non-noble metal
  • 作者: Liu Jie Wang Wang Wang Lei Qi Xian-Mei Sha Yu-Hui Yang Ting
  • 学科: 医药卫生 >
  • 创建时间:2020-08-10
  • 出处:《中华医学杂志(英文版)》 2020年第01期
  • 机构:Department of Immunology, Capital Medical University, Beijing 100069, China,Department of Physiology and Pathophysiology, Capital Medical University, Beijing 100069, China; Beijing Key Laboratory of Respiratory and Pulmonary Circulation Disorders, Capital Medical University, Beijing 100069, China,Beijing Key Laboratory of Respiratory and Pulmonary Circulation Disorders, Capital Medical University, Beijing 100069, China; Department of Respiratory and Critical Care Medicine, China-Japan Friendship Hospital, Beijing 100029, China
  • 简介:AbstractBackground:Pulmonary arterial hypertension (PH) is a progressive disease with limited therapeutic options, ultimately leading to right heart failure and death. Recent findings indicate the role of the Warburg effect (aerobic glycolysis) in the development of PH. However, the effect of the glycolysis inhibitor 3-bromopyruvate (3-BrPA) on the pathogenesis of PH has not been well investigated. This study aimed to determine whether 3-BrPA inhibits PH and its possible mechanism.Methods:PH was induced in adult Sprague-Dawley rats by a single intraperitoneal injection of monocrotaline (MCT). 3-BrPA, or phosphate-buffered saline (PBS) was administered via intraperitoneal injection every other day from the first day of MCT-injection to 4 weeks of follow-up, and indices such as right ventricular systolic pressure (RVSP), right ventricular hypertrophy index (RVHI), pulmonary arteriolar remodeling indicated by percent media thickness (% MT), lactate levels and glucose consumption, were evaluated. Pulmonary arteriolar remodeling and right ventricular hypertrophy were observed in hematoxylin-eosin-stained lung sections. Western blotting, immunohistochemistry, and/or immunofluorescence analyses were used to measure the expression of relevant proteins. A cytochrome C release apoptosis assay and terminal deoxynucleotidyl transferase-mediated dUTP-biotin nick end-labeling staining were used to measure cell apoptosis.Results:MCT-induced PH showed a significant increase in glucose consumption (0 vs. 4 weeks: 0.87 ± 0.23 vs. 2.94 ± 0.47, P = 0.0042) and lactate production (0 vs. 4 weeks: 4.19 ± 0.34 vs. 8.06 ± 0.67, P = 0.0004). Treatment with 3-BrPA resulted in a concomitant reduction in glucose consumption (1.10 ± 0.35 vs. 3.25 ± 0.47, P = 0.0063), lactate production (5.09 ± 0.55 vs. 8.06 ± 0.67, P= 0.0065), MCT-induced increase in RVSP (39.70 ± 2.94 vs. 58.85 ± 2.32, P= 0.0004), pulmonary vascular remodeling (% MT, 43.45% ± 1.41% vs. 63.66% ± 1.78%, P < 0.0001), and right ventricular hypertrophy (RVHI, 38.57% ± 2.69% vs. 62.61% ± 1.57%, P < 0.0001) when compared with those of the PBS-treated group. 3-BrPA, a hexokinase 2 inhibitor, exerted its beneficial effect on PH by decreasing aerobic glycolysis and was also associated with inhibiting the expression of glucose transporter protein-1, inducing apoptosis, and suppressing inflammation.Conclusions:3-BrPA might have a potential beneficial effect on the PH treatment.

  • 标签: Pulmonary arterial hypertension Monocrotaline 3-Bromopyruvate Aerobic glycolysis