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简介：Floodingandanaerobicstressisoneofthestressfactorsaffectingmangroves.Mangrovespecies,differingconsiderablyintheirsusceptibilitytothestress,aredistributedindifferenttidalelevationzones.Growinginregularseawaterdippingandanoxicmud,mangroveshavedevelopedasetofadaptationmechanismsoffloodingandanaerobicstress.Thispaperemphaticallyreviewedfourphysiologicalresponsesofmangrovestofloodingandanaerobicstress,i.e.nutritionallocation,photosynthesisandrespiration,carbonandnitrogenmetabolismandantioxidantmechanism.Finally,itwasproposedthatstudiesshouldbefurtherfocusedonthepathofrootsmetabolism,non-structurecarbohydratesandsecondarymetabolismofthemangrovesunderfloodingandanaerobiccondition.

简介：36从柱子被恢复了的度和顺序的地球重力场模型CDS01S处理了科学轨道和GFZ的机载的加速表数据“sCHAMPsatellite。模型与精确性解决大地水准面比在700km一半波长的一个决定的4厘米好。由使用重力势系数的学位差别变化把模型CDS01S与EIGEN3P，EIGEN1S和EGM96作比较，结果显示系数ofCDS01S离EIGEN3P的那些很靠近。在在上面的精确性ofgeopotential系数之间的比较的结果当模特儿，显示在在EGM96的比那高的CDS01Sis的系数的精确性。直到30个学位的CDS01S和GGM01C的大地水准面波动被计算，标准差是在他们之间的4.7厘米。

简介：Inthispaper,westudyasimplifiedmodelwithdelayforacontroloftestosteronesecretion.EmployingtheejectivefixedpointprincipleduetoNussbaum,theexistenceofslowlyoscillatingperiodicsolutionofthemodelisprovenwhenthedelayparameterr>r0,forsomeconstantr0>0.

简介：米饭(OryzasativaL.)的十遗传型与1mmol/L在完全的滋养的答案为30d被种(N不够)，4mmol/L(N中等)并且10mmol/L(N高)氮层次，和氮效率(NE)被分析。生长性能，以根和射击的新鲜重量，干燥重量和长度测量了，是更高的在比在在低N的N低效的米饭遗传型N有效水平。这10遗传型，Suraksha作为最N有效被识别，当时VivekDhan最N低效。为了发现这差别，根的硝酸盐举起率和硝酸盐的活动的生理的基础，在N有效、N低效的米饭遗传型的叶子的同化的酶被学习。举起实验揭示了高亲密关系的调停的二个分开的硝酸盐transporter系统和低亲密关系的硝酸盐举起的存在。有趣地，由Suraksha的根的硝酸盐举起被高亲密关系、低亲密关系的硝酸盐transporter系统调停，当时由仅仅低亲密关系的硝酸盐transporter的VivekDhan的系统。这些活动的学习和在N有效、N低效的米饭遗传型的同化的酶显示出的硝酸盐的表示层次那硝酸盐reductase(NR)和夫酸安合成酶(GS)在低氮的条件下面在N吸收起重要作用。

简介：ToxicityofMgOandZnOnanoparticlesatconcentrationsof250,500or1000mg/LforCitrusmaximaseedlingswasinvestigatedtoevaluatethepotentialityoftheiruseasnano-fertilizers.UptakeandtranslocationofmetaloxidenanoparticlesandlipidperoxidationweremeasuredandcomparedwiththoseofplantsexposedtothehighestequivalentconcentrationsofMg2+andZn2+.MgOnanoparticlesweretranslocatedfromrootstoshoots,whiletranslocationofZnOnanoparticleswaslow.ExposuretoMg2+andMgOatallconcentrationsentailedseveretoxicityandstrongoxidativestress.ZnOnanoparticlesshowedonlymildtoxicity,whileZn2+causedleafveinchlorosisandstrongoxidativestresstoplantshoots.Inconclusion,thetoxicityofMgOnanoparticlestotheplantresultedfromthedissolvedMg2+concentration,whilethatofZnOnanoparticleswasnotcorrelatedwiththedissolvedZn2+concentration.OurfindingsaresignificantfordevelopmentandapplicationofMgOandZnOnanoparticlesasnano-fertilizersinagriculture.

简介：Aphysiologicalmodelwithdelayisconsidered.Thetimedelaybeingregardedasaparameter,agroupofconditionsthatguaranteethemodelhavemultipleperiodicsolutionsisobtainedbytheglobalHopfbifurcationtheoremforFDEandBendixson’scriterionforhigh-dimensionalODE.Theresultsareillustratedbysomenumericalsimulations.

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简介：Balletteachingisanimportantstepintrainingprofessionaldancingtalents.Bothscientificteachingmaterialsandstricttrainingplayavitalroleintheshapingofballetdancers.Ballettrainingisbasedonhumananatomyanddancephysiologyanditisasetofscientifictrainingsystemestablishedaccordingtothehumanbodystructure.Thehumanbodyisatoolfordancing,soitmustbecaredforineverypossibleway.Atthesametime,italsoneedstobemeasuredbeforeuse,likewoodforcellomaking—onlytherightpieceofwoodcanbechosenforthispurpose.Asscientificandreasonablemethodsserveasaguaranteetoimprovetheeffectofballetteachingandtraining,theprinciplesofdancephysiologymustbefollowed.Thispapermainlyexpoundsthebasicprinciplesofdancingphysiologyforballettraining,themainstagesofballetteaching,andproblemsconcerningscientificityandnormalizationofballettraining.

简介：BACKGROUND:Physiologicalconvulsivethresholdsdegradewhenthebrainisinsomepathologicstates;thus,alevelofstimulusthatcannotprovokeaconvulsionmayevokeaseizureorepilepticseizure.OBJECTIVE:Toinvestigatethechangesthatoccurinthebrainwhenthephysiologicalconvulsivethresholdbecomespathological,andtodeterminewhatdifferencesoccurinpathologicalandphysiologicalconvulsivethresholdsduringthedevelopmentofepilepsy.DESIGN:Arandomizedcontrolledanimalexperiment.SETTING:ResearchInstituteofEpilepsyofShanxiMedicalUniversity;DepartmentofNeurology,TheThirdHospitalofShanxiMedicalUniversity;ResearchInstituteofFunctionofShanxiMedicalUniversity.MATERIALS:Thirty-sixfemaleWistarratswereselectedforthisstudy.TheratswereobtainedfromtheexperimentalanimalcenterofShanxiMedicalUniversity.Alllaboratoryprocedurescompliedwithanimalethicalstandards.Theanimalswererandomlydividedintothreegroups:astrongcurrentgroup,aweakcurrentgroupandacontrolgroup,with12ratsineachgroup.AnautomaticdeterminatorofseizurethresholdwasmadeatShanxiMedicalUniversityandTaiyuanUniversityofTechnology.Twobipolarstainlesssteelstimulatingelectrodesandanelectrodeconnector(diameter1.2mm)weremadeatTaiyuanUniversityofTechnology.METHODS:ThisstudywasperformedinthelaboratoryofResearchInstituteoftheEpilepsyofShanxiMedicalUniversitybetweenDecember2005andAugust2006.Thethresholdoflocalizedseizureswasmeasuredbyperformingdirectcorticalstimulationinratsunderanesthesia.After1weekofpost-operativerecovery,electricstimulationwasstartedwiththreedifferentkindsofstimulation.Seizureactivitywasinducedbyaramp-shapedsingletrainofbiphasicpulses(50Hz,totalpulsedurationof2ms,increasingfrom0to2000μAin15seconds).Thethresholdoflocalizedseizures(TLS)hasbeendefinedastheminimumcurrentintensitynecessarytoprovokeconvulsionoftheforel

简介：Soilsalinityisoneofthemostimportantproblemsofcropproductioninestuarineandcoastalzones.Improvementinsalttoleranceofmajorfoodcropsisanimportantwayfortheeconomicutilizationofcoastalzones.Thisstudyprovedthattheapplicationofsalicylicacid(SA)improvedthegrowthandyieldundersaltstressconditionsandinvestigateditsphysiologicalmechanismsforsalttolerance.TheinvestigationontheeffectofSAforsalttoleranceduringgerminationshowedthatthedecreasedratesofgerminationandgrowth(intermsofshootandrootlengths)bythesaltstressweresignificantlyincreasedbytheSAapplication(SA+NaCl).ThetreatmentofSAtothehighandlowsalinesoilsenhancedthegrowth,yieldandnutrientvaluesofrice.TheeffectsofSAonNa+,K+andCl–ionicaccumulationweretracedundersaltstressconditionbyinductivelycoupledplasmaopticalemissionspectrometryandionchromatography.ItwasrevealedthattheincreasedaccumulationofNa+andClˉionsbythesaltstresswerereducedbySAapplication.AnincreasedconcentrationofendogenousSAlevelwasdetectedfromtheSA-treatedricevarieties(ASD16andBR26)byliquidchromatographyelectrosprayIonization-tandemmassspectrometry.Theactivitiesofantioxidantenzymessuchassuperoxidedismutase,catalaseandperoxidasewereincreasedbysaltstresswhereasdecreasedbytheSAapplication.ThestudyprovedthattheapplicationofSAcouldalleviatetheadverseeffectsofsaltstressbytheregulationofphysiologicalmechanisminriceplants.Inspiteofsaltstress,itcanbeappliedtothecoastalandestuarineregionstoincreasethericeproduction.

简介：AbstractBackground:The 2019 novel coronavirus has caused the outbreak of the acute respiratory disease in Wuhan, Hubei Province of China since December 2019. This study was performed to analyze the clinical characteristics of patients who succumbed to and who recovered from 2019 novel coronavirus disease (COVID-19).Methods:Clinical data were collected from two tertiary hospitals in Wuhan. A retrospective investigation was conducted to analyze the clinical characteristics of fatal cases of COVID-19 (death group) and we compare them with recovered patients (recovered group). Continuous variables were analyzed using the Mann-Whitney U test. Categorical variables were analyzed by χ2 test or Fisher exact test as appropriate.Results:Our study enrolled 109 COVID-19 patients who died during hospitalization and 116 recovered patients. The median age of the death group was older than the recovered group (69 [62, 74] vs. 40 [33, 57] years, Z = 9.738, P < 0.001). More patients in the death group had underlying diseases (72.5% vs. 41.4%, χ2 = 22.105, P < 0.001). Patients in the death group had a significantly longer time of illness onset to hospitalization (10.0 [6.5, 12.0] vs. 7.0 [5.0, 10.0] days, Z = 3.216, P = 0.001). On admission, the proportions of patients with symptoms of dyspnea (70.6% vs. 19.0%, χ2 = 60.905, P < 0.001) and expectoration (32.1% vs. 12.1%, χ2 = 13.250, P < 0.001) were significantly higher in the death group. The blood oxygen saturation was significantly lower in the death group (85 [77, 91]% vs. 97 [95, 98]%, Z= 10.625, P < 0.001). The white blood cell (WBC) in death group was significantly higher on admission (7.23 [4.87, 11.17] vs. 4.52 [3.62, 5.88] × 109/L, Z = 7.618, P < 0.001). Patients in the death group exhibited significantly lower lymphocyte count (0.63 [0.40, 0.79] vs. 1.00 [0.72, 1.27] ×109/L, Z= 8.037, P < 0.001) and lymphocyte percentage (7.10 [4.45, 12.73]% vs. 23.50 [15.27, 31.25]%, Z = 10.315, P < 0.001) on admission, and the lymphocyte percentage continued to decrease during hospitalization (7.10 [4.45, 12.73]% vs. 2.91 [1.79, 6.13]%, Z= 5.242, P < 0.001). Alanine transaminase (22.00 [15.00, 34.00] vs. 18.70 [13.00, 30.38] U/L, Z = 2.592, P = 0.010), aspartate transaminase (34.00 [27.00, 47.00] vs. 22.00 [17.65, 31.75] U/L, Z = 7.308, P < 0.001), and creatinine levels (89.00 [72.00, 133.50] vs. 65.00 [54.60, 78.75] μmol/L, Z = 6.478, P < 0.001) were significantly higher in the death group than those in the recovered group. C-reactive protein (CRP) levels were also significantly higher in the death group on admission (109.25 [35.00, 170.28] vs. 3.22 [1.04, 21.80] mg/L, Z = 10.206, P < 0.001) and showed no significant improvement after treatment (109.25 [35.00, 170.28] vs. 81.60 [27.23, 179.08] mg/L, Z = 1.219, P = 0.233). The patients in the death group had more complications such as acute respiratory distress syndrome (ARDS) (89.9% vs. 8.6%, χ2 = 148.105, P < 0.001), acute cardiac injury (59.6% vs. 0.9%, χ2 = 93.222, P < 0.001), acute kidney injury (18.3% vs. 0%, χ2 = 23.257, P < 0.001), shock (11.9% vs. 0%, χ2 = 14.618, P < 0.001), and disseminated intravascular coagulation (DIC) (6.4% vs. 0%, χ2 = 7.655, P = 0.006).Conclusions:Compared to the recovered group, more patients in the death group exhibited characteristics of advanced age, pre-existing comorbidities, dyspnea, oxygen saturation decrease, increased WBC count, decreased lymphocytes, and elevated CRP levels. More patients in the death group had complications such as ARDS, acute cardiac injury, acute kidney injury, shock, and DIC.

简介：砷(作为)，由于自然以及人为的过程在土壤环境释放的潜在地有毒的非金属，被庄稼植物随后收起。在米饭谷物，作为在亚洲，北美洲和欧洲被报导了，建议未来威胁到食物安全和庄稼生产。作为凭它的可获得性，活动性和植物毒性的3+，是最有害的种类至于米饭庄稼。特定的transporters调停不同种类的运输作为从根到未葬植物身体的部分。累积作为在植物导致有毒的反应，影响它的生长和生产率。的增加当举起导致抗氧化剂的氧化应力和生产抵抗这，强调。对容忍的栽培变种因为应力在与敏感的相比的抗氧化剂新陈代谢是有效的。铁和硒被发现在引起由的氧化压力上有改善效果作为。微生物，甚至许多土生土长的，在植物，根围也能够作为在他们的新陈代谢利用，独立地并且在里面协会。一些这些微生物在在成年的植物给予忍耐到当压力是污染了地点。

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简介：可勃起的反应被雄激素集中地并且外围地调整。进雄激素的行动的机制的原来的卓见是雄激素特别地在性欲上施加效果并且响应性爱刺激的勃起是相对雄激素无关的。在男人的性函数在睾丸激素的引用值的低结束要求了雄激素层次，这被显示出。那么看起来睾丸激素不是为有可勃起的困难的男人的有用处理，特别地跟随磷酸二酯酶类型的来临5(PDE5)禁止者。然而，与PDE5禁止者对待的约50%那些中止他们的处理。很多最近的开发在使人变老在可勃起的机能障碍(编辑)的睾丸激素处理上打开新灯。(1)最近的卓见是与更年轻的男人相对照，老男人可能为正常性工作要求睾丸激素的高水平。(2)几研究显示了PDE5禁止者不总是是足够的在男人恢复可勃起的力量，并且那睾丸激素更加改进therapeutical反应到PDE5禁止者。(3)正在种睾丸激素有的卓见阴茎的纸巾上的深刻效果在勃起和那睾丸激素缺乏的机制包含了损害可勃起的能力的解剖、生理的底层，在雄激素代替之上可逆。PDE5的合成起来由雄激素调整了，并且进阴茎的动脉的流入被给雄激素改进。上面邀请把睾丸激素给与编辑使人变老的优点的复试PDE5禁止者的有益的效果可以最佳地仅仅在eugonadal环境被表示。

简介：在恢复地球严肃模特儿(EGM)由创造的标准方程的特征最少平方(LS)从在原处扰乱的潜力的调整详细被讨论。标准方程仅仅看情况，这能被结束先验的重力模型的在轨道，和选择没在LS答案上有效果。因此，恢复严肃模型的精确性能精确地被模仿。从这个点开始，与噪音的不同水平沿着轨道扰乱潜力的四个集合被模仿并且被用来恢复EGM。结果证明在加速表刻度的当前的精确性水平上，EGM的精确性不是足够的反映地球的重力场的时间可变性，作为揭示的动态方法。

简介：Studiesofultra-dryingandacceleratedagingonHippophaerhamnoidesseedsfromthearidandsemiaridareasofnorthwestChinawereconducted.TheresultsshowedthatH.rhamnoidesseedshadhigherdesiccationendurance.Whenseedsweredesiccatedto26g/kg,theirgerminationpercentage,vigorindicesandenzymeactivitycouldberetained.After30-dayacceleratedaging,ultra-driedseedshadbetteranti-agingabilityandstorabilitycomparedtonaturaldriedseeds,andthebestchoicefortheMCofseed...

简介：Basedonfullconsiderationofthewinterwheatbiologicalcharacters,anagrometeorologicalmodelofphysiologicalthermalindexofwinterwheatincludingvernalizationandphotoperiodresponseisestablished,inwhichtheinfluenceofdiurnalvariationoftemperature,effectivetemperatureanddaylengthonthedevelopmentofwinterwheatduringtheperiodfromemergencetoelongationarecomprehensivelyconsidered.ValidationofthemodelusingthedatatakenfromtheexperimentsofwheatecologyinChinashowsthatthemodelbehaveswellwithmeanerrorlessthan3days.

简介：ToinvestigatedifferencesinphysiologicalcharacteristicsofgrowthandphysiologicalbasisofhighgrowthvigorinthefirstgenerationofPopulusdeltoideswhicharefromdifferentgrowthvigorclones,herewechosetwogroupsofseedlingswithdifferentgrowthvigor:high（A）andlow（B）.Indexesofphenotypeandphysiologyweresuccessivelymeasuredtostudythegrowth,photosynthesisandnutrientabsorption.Thereweresignificantorverysignificantdifferencesindrymassofroot,stem,leafandthetotalbiomassbetweenAandB.Drymatterofrootshadthesmallestproportionindifferentcomponents,andthelargestproportionwassteminA,whiletheleafhadthelargestproportioninB.ChangesingrowthandphysiologicalcharacteristicsshowedacertainregularityduringJunetoSeptember.AllclonesgrewthemostrapidlyandphysiologicalcharacteristicsvariedthemostsignificantlyinJuly.Correlationanalysisshowedthatseedlingheightandgrounddiameterwerebothsignificantlycorrelatedtoleafarea,nightrespirationrate,NH4-uptakerateandthetotalphotosyntheticrate（R>0.826,P<0.05）,suggestingthattheseedlinggrowthwasmainlyaffectedbytheirowntotalphotosyntheticcapacity,nutrientabsorptionandnightrespirationconsumption.Ingeneral,AwassuperiortoBinallthesefactors,whichconstructphysiologicalbasisofthehighgrowthvigor.

简介：Threetreatmentsconsistingof0%,15%,and30%seawaterwereinvestigatedtoanalysetheecotypicvariabilitiesamongfivepopulationsofJerusalemartichoke(Helianthustuberosus)regardingtheirresponsestoseawaterstressunderahydroponicculturesystem.Analysesweredone2,4,and6daysaftertreatments.The15%and30%seawatertreatmentsreducedthegrowthratesofrootsandshootsofH.tuberosuspopulations.Theactivitiesofsuperoxidedismutase,peroxidase,andcatalasemajoredintheleaveswerestimulatedundertheseawaterstress.Theelectrolyteleakageandmalondialdehydecontentsoftheleaveswerealsostimulatedowingtoseawaterstress.Thecontentsofprolineandsoluble-sugarsintheleavesincreasedsignificantlywithincreasingseawaterconcentrations.TheconcentrationsofNa+,K+,andCl-intheaerialpartsandrootsincreasedwithanincreaseintheseawaterconcentrationthroughouttheexperimentalperiod.TherewereecotypicdifferencesamongthefivepopulationsofH.tuberosusasevidencedbytheanalysesoftheaboveitemsinbothaerialpartsandrootsunderseawatertreatment.Themagnitudeoftheecotypicvariancecomponentsindicatedthatasubstantialproportionofthetotalvariationforthesephysiologicalandbiochemicalresponseswereowingtoecotype,indicatingthepossibilityofimprovementthroughhybridizationandselection.