简介：Inordertodeterminetheroleofalginate-derivedoligosaccharides(ADO)indroughtstressresistanceoftomato(Ly-copersiconesculentumMiller)seedlings,theleaveswereexposedtodifferentconcentrationsofADO(0.05%,0.10%,0.20%,0.30%and0.50%)afterdroughtstresswassimulatedbyexposingtherootsto0.6molL-1PEG-6000solutionfor6h.Changesinbiomass,electrolyteleakageandmalondialdehyde(MDA),freeproline,totalsolublesugars(TSS)andabscisicacid(ABA),theenzymeactivitiesofcatalase(CAT),superoxidedismutase(SOD),peroxidase(POD)andphenylalanineammonia-lyase(PAL)weremeasuredtoinvestigatetheeffectsofADOtreatment.TheresultsshowedthatthetreatmentwithanADOconcentrationof0.20%exhibitedthehighestperformanceofdroughtstressresistanceinthetomatoseedlingsbydecreasingtheelectrolyteleakageandtheconcentrationofMDA,increasingthecontentsoffreeproline,TSSandABA,andincreasingtheactivitiesofCAT,SOD,PODandPALaftertreatmentwithADO.Itissuggestedthatchangesinelectrolyteleakage,MDA,osmoticsolutes,ABA,anti-oxidativeenzymeandPALactivitieswereresponsiblefortheincreaseddroughtstressresistanceintomatoseedlings.Toourbestknowledge,thisisthefirstreportoftheeffectofADOtreatmentonenhancingthedroughtstressresistanceoftomatoseedlings.

简介：腐蚀抵抗无电在钠氯化物答案从12%～14%与磷的内容捏存款被学习。存款沉浸于3.5%NaCl答案让29d获得电气化学的参数；分别地为15d在标准盐水花测试被检验。存款的腐蚀抵抗被potentio动态的扫描学习，电气化学的阻抗光谱学(EIS)，X光检查衍射(XRD)；扫描电子显微镜学(FE-SEM)的冷地的排放与一个精力装备了散X光检查察觉者(EDX)。XRD的模式；FE-SEM的结果证明准备存款是非结晶的。但是在15d标准盐水花测试以后，一些针孔出现在存款的表面上；存款的表面上的磷的重量内容更高(它对钝化电影的形成有益)当因为镍的溶解重量比磷的大，镍内容更低时，比那，在标准盐前，水花测试。从potentio动态的扫描的结果；EIS证明钝化电影在NaCl答案在沉浸以后在Ni-P存款上形成了，它减少了腐蚀率捏样品。这个工作的结果在海洋的腐蚀显示出他们的潜在的应用。

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简介：Inordertoanalyzetheice-goingship’sperformanceunderthepackiceconditions,syntheticicewasintroducedintoatowingtank.Abarrierusingfloatingcylinderinthetowingtankwasdesignedtocarryouttheresistanceexperiment.Thetestresultsindicatedthattheencounteringfrequencybetweentheshipmodelandthepackiceshiftstowardsahigh-velocitypointastheconcentrationofthepackiceincreases,andthisencounteringfrequencycreatesanunstableregionoftheresistance,andtheunstableregionshiftstothehigherspeedwiththeincreasingconcentration.Theresultsalsoshowedthatforthesamespeedpoints,theratioofthepackiceresistancetotheopenwaterresistanceincreaseswiththeincreasingconcentration,andforthesameconcentrations,thisratiodecreasesasthespeedincreases.Motioncharacteristicsshowedthatthemeanvalueoftheheavemotionincreasesasthespeedincreases,andthepitchmotiontendstoincreasewiththeincreasingspeed.Inaddition,thetotalresistanceofthefullscalewaspredicted.

简介：Seacucumbers,ApostichopusjaponicusSelenka,werefeddietscontainingnon-immunostimulant(basaldiet),0.2%β-glucanand0.02%glycyrrhizininarecirculatorywatersystemfor45days,andsubsequentlychallengedwithVibriosplendidusbyinjectionat1.0×108cfu/seacucumberfor15days.Phagocyticcapacity(PC),intracellularsuperoxideanionproduction(ISAP),ly-sozyme(LSZ)activityandsuperoxidedismutase(SOD)activityinthecoelomicfluidwereanalyzedonthe0th,5th,10thand15thdaysafterinjection.Resultsshowedthatafterthe45-dayfeedingperiod,PC,ISAP,LSZactivityandSODactivityinseacucumbersfedwithdietaryβ-glucanorglycyrrhizinweresignificantlyhigherthaninthosefedwiththebasaldiet.Onthe5thdayafterinfection,alltheimmuneparametersexaminedintheseacucumbersinjectedwithV.splendidusdecreasedinvaluesignificantly.Onthe15thday,PC,ISAPandLSZactivityreturnedtolevelssimilartothoseonthe0thday.Fortheseacucumbersinjectedwithsaline,therewerenosignificantdifferencesinalltheimmuneparametersexaminedandinthecumulativemorbidityduringthe15-daychallengingtrial.AfterinjectingwithV.splendidus,thecumulativemorbidityofseacucumbersfedwiththebasaldietwassignificantlyhigherthanthosefedwithdietaryβ-glucanorglycyrrhizinwhenchallengedwithV.splendiduschallengedseacucumberfedwiththebasaldietwassignificantlyhigherthanthosefedwithdietaryβ-glucanorglycyrrhizin.Therewasnosignificantdifferenceincumulativemorbiditybetweenthedietaryβ-glucanandglycyrrhizintreatmentsovertime.