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1.
SORPTION OF BENZOTHIOPHENE ON MARINE SEDIMENTS 总被引：2，自引：0，他引：2
ImODUcrIONBenzothiophene(acomPoundinp0lycydicarornaticsulfurheterocydespresentincrudeoilsandcoal)isaddedt0marineenvironmentfromavariCtyofsouna,andisofenvironrnentalconcernduetoitSharmfulproperties(Andefssonetal.,l992,Yang,l996).Warner(l975)obtainedsulfur-containingpetroleumcomPonentSsuchasbensothiophenefr0mrnarinesamplesandfoundthatthepolycydicarornaticsuifurheterocydesweremorercadilybioconrmtratedthansulfur-freep0lycydicaromaticcompounds.Yang(l997)foundthatbensothiophenewaspresentinallin… 相似文献
2.
ThisworksupportedbytheScienceandTechnologyCommitteeofShandongProvince.Grant(95)50.INTRODUCTIONManyinvestigationsindicatalthatsupplementation0fsuitableseleniumleveIstolowordefidentinseleniumdietcanpreventoccurrenceofvarioustumots(Chen,l990),enhanceorganisminimneability(Wu,l992),maintainthenormalfunCtion0fheart,liv-er,lungandstomach(Schwarzetal,l957),andisgoodpareuti0nsagainstcardiovascularandcerebrovascu1arproblemsinoldpeople.Seleniumisanessentialtraeeelernentfornonnalhumanlife(Balassa… 相似文献
3.
lareODUcrIONThetotalcarbondi0xideisandriportantparametrforestirnatingthespatiotem0ralinorganiccarbontransport,andanthropogeniccarb0ndi0xideincreasesintheoonn.Ap~coulomericednique(MethodG0fASTMD5l3-82)formeasuringDICinanwaterdevelopedbyJohnsonetal.(l985)istheshipkoardmehodchosenfortheglobeocanicinofganiccarb0nsurveyt0bemadeinconjunCtionwiththeW0riddrinCirmlationExperirnentWorklHydrographicProgram(WOCEWHP)andtheJointGobal~nFluxStudy(JGOFS)program(Catherine,G.etal.,l993).Thecruxof… 相似文献
4.
王佳 《中国海洋湖沼学报》1997,15(4):369-372
ImooUcr0NCormsinnofsodinconatisnowrognindasaseriousproblemwithlargeere-nondconSequenas.Thecormsionproducofondatthesurfaeeofrenfontin-dutaltenSioninthernaterial,resultinginfraCtureandspillingoftheconcretefromtherenfoot(Madrinaldetal.,l99l).Asaasult,theconCretestructure'sIneCanhalstwthisgreatiytalued.0wingtothephyShaldfultyofconduCtingforchdricalexperiInentsinconare,muCoftheworkintheaasofndanisticdCtendnationsforcormsionofstalincon-~wereconduedinalkalinesolution,generallyofporewatCr(Romirz… 相似文献
5.
lNTRODUCTI0NSincetheoonceptofrnarinesplashzone(MSZ)wasfirstproposedbyHumble,rnanyresearchesprovedthatthecorrosionofsteelinthesplashzoneisthemostseriousinthemarineenvironninetandthatthisMSZcorrosionhasapeak(Zhu,l995).Howevertheenvironmentalfactorscatisingthecorrosionpeakwasnotkn0wnthen(Niat0,l975,Atsushi,l994)andtherangeoftheMSZwasnotyetdeariydefinedopzkaki,l985).ThispaperexplainsthemaincauseofthecormsionpeakanddefinestheexaCtrangeoftheMSZinsomeofChina'sharbours.MATERIALSANDMET… 相似文献
6.
EVALUATION ON NUTRITIVE VALUE OF PORTUNUS TRITUBERCULATUS 总被引：2，自引：0，他引：2
MODUon0NP.trituberculatushasanupswellingshuttiedsecephalothoraxcrust0nWhosescheearemanydiversefinegranuleswhichbererneroughandconcentIatalinthegillaas.IthasthIeewartybulgesandtwosharpodhonitSforeheadPaiAiy-U,l986).Thechelipedisdeveloped,itSmerusisshuuleshaped,thefotirthpairofpereiopodsareuseoars,itScarpopoditiswideandshort,thedaCty0poditisslab-shaped,eachjoint'sedgehasshorthahaforswirTuning,themalebodyisbluishgreen,andthebolebodyisadeeppmple.Maleanddrileglands')locateatthedorsalordorsola… 相似文献
7.
STUDIES ON CULTURE CONDITIONS OF BENTHIC DIATOMS FOR FEEDING ABALONE I.EFFECTS OF TEMPERATURE AND LIGHT INTENSITY ON GROWTH RATE 总被引：2，自引：0，他引：2
INTRODUCTIONBenthicdiatomscomPrisethemaininitialfoodforjuvenileabalone.ItisimPortanttocIJlturehighqualitybenthicdiatornsduringtheeariystageofjuvenileabaloneculture.AtpresentthespeCesofbenthicdiatomsusedinabalonebedingfannsprirnarilycomefromnaturalpopulations.SomespedesinseveralgenerasuchasNavicula,Ntzchia,Caroneis,Achnanthes,AmPhoraareusuallythedothenantspch(Chen,etal.,l977,Ukiandaxuchi,l979,Nonnan-Boudnauetal.,l986,Austinetal.l990).Inordertoselodsornespedeswithhighadaptability,fas… 相似文献
8.
TheSouthChinaSea(SCS)islocatalinthejunCti0noftheEurasian,PacificandIndodeustralianPlates,andisoneofthebiggestrnarginalseasinthewesternPadfic~n.Uyeda(l977)regardedtheSCS'soriginasoneofthebasicprobboincompletelyre-solvedbytheTheoryofPlateTeCtoniesrv).Heaskedfl.Whydoesanarcriseup(theoriginofarcmountains)?2.Whyisthestressinthebackurcbasinregionextensional(theoriginofbackurcbasin)?3.Whyisthernantleintheinnerurcbelthot(theoriginofvohanismandhighgcothermalflow)?Therewermanyviewnointsontheori… 相似文献
9.
lareODUcrI0NThephenomenonofbreakingwavesintheoasnoocurswheneveramomentahiyhighcrestmecheSanunstablecondition.It0ccursintendtimhy,andtheoccurrencefre-qUencydePendsonthescastate.ManystudAshaddricaniedoutontheoccurmcefre-qUencyofbrmkingwavesindeepweter.0chiandTsai(l983),LongueHiggins(l975)andVanD0mandPamn(l975)nadstheptalictonofbrmkingwavesoccurrenceindeePwater,usingabaskingcriterionforindividualwavesbasedonthewavesmpness.ThecriterioncanbeexpmeedintennSofthewaVehdghtHandperiodTasH>PgT'(… 相似文献
10.
rmDUCnONInthecultUreofbenthicdiatomsasfeedforabalone,itisnecesoptoaddsomnu-trientssuchasnitIngen,Phosphorus,ironandsilicontotheSeawatermwhum.Thecom-monraioofthenutrientswas(lO-25):(l-2.5):o.l:l(mg/L)(Chenetal.,1977).Anstinetal-(l99o)rePOrtedthatheratioofnibogenandphosphorusinfluencedthebio-massdensityofthePeriphyton,whichInainlyconsistedOfbenthicdiatomPOPulations.However,theirrestiltswerenotbasedonmonoalgalwwh,andtherewerenodetallsonthereasonableratioofthesenutrientsintheirreports-Ther… 相似文献
11.
杨宇峰 《中国海洋湖沼学报》1996,(1)
Feeding of freshwater cyclopoid copepod Acanthocyclops robustus on zooplankton was examined by aseries of feeding experiments during August-September of 1993. Study results showed A. robustus can cap-ture and eat all type items provided from the Staly Haklovsky fishpond, a shallow eutrophic water bodynear Budejovice City, Czech Republic. Selation by the predator was determined largely by prey body-sizeand density, but was also affected by prey types. Variable but significant changes in feeding rates werefound in various size distribution and concentration of prey types. Percentages of small (80-235μm)andlarge (445-6l0μm) prey consumed were 42.47 and 3.85%, respectively.Starvation did not cause statisticallysignificant difference. The feeding on Ceriodaphnia quadrangula showed significant difference between largeand small prey.Feeding rate increased with increasing prey concentration. 相似文献
12.
ImODUcrIONThetermphlorotanninswascoinedbySattlerinl974(dtalinRagan&Glombiha,l986)forthebrownalgalpolyphenoIshavingcheAncalcharacteristiesoftannins.Later,theirstmCturalunitwasprovedraaganandGlombitsa,l986)tobephlorogludnol(i.e.l,3,5-trihydroxybename).OginoandTaki(l957)notalthattheaqueousextraCtSoffreshthalliofSargassumringgoldianumhavetanninproperties(tumingbluishorreddishvioletafteradditionofironsaltS,astringenttaste,andabilitytopredpitategelatin).HighmolecularweightpolyphenoIsfromAsco… 相似文献
13.
14.
Thethreatagainstthecoastallowlandcausedbysea-levelriseisoneofthefocusesoftheworid'sat-tention.Thebestestimatevalueofglobaltheoreticalsea-levelriseinthe2lstcenturyisO.66m(SCOR,l99l)byworldwideauthoritativeorganizationsuchasIPCC(IntergovernmentPanelofClimateChange)etal.ThecrustofChangiiangDeltaissubsiding.Theaveragesubsidencerateinthelast2OOOaisl.2mm/a(PANetal.,l985).TheislandsoftheChangiiangRivermouthareaccumulatinglowlandislandsandtheirnat-uralelevationisbelowthehightidallevelofsprin… 相似文献
15.
DIETARY MANGANESE REQUIREMENT OF P. VANNAMEI 总被引：1，自引：0，他引：1
刘发义 《中国海洋湖沼学报》1997,(2)
M0DUonONManganeseisanessentialelernentfororganismss.TherearernanypublishedreportS0ntheMnrequdritSoritSdrionfishes,indudingrainb0wtrout,channelcatfish,Atianticsalmon,cornmncarp,grasscarp,tilapia,Ctc.Kanamwaetal.(l984)andLiCtal.(l992)reportedtheresultSoftheiraseawhonthernanganeserequdritSofjuvenileP.japonicusandP.chinensiS.Davisandhawrence(l99O)studndthetheofdietaryman-ganeseonP.vannameibydeletionofMnfromthendneralpedinasdri9udrieddiet.ThepresentstudyontheefhaofgtadedleveIs0frnanganeses… 相似文献
16.
曹吉祥 《中国海洋湖沼学报》1996,(4)
This study on the effect of different concentrations of germanium dioxide (GeO_2) on the specificgrowth rate (SGR), pigment contents, protein content and amino acid composition of Spirulina platensisshowed that Ge was not the essential element of this alga; that GeO_2 could speed up growth and raiseprotein content of S. platensis, and could possibly influence the photosynthesis system. The concentrationrange of GeO_2 beneficial to growth of S. platensis is from 5-100 mg/l. GeO_2 is proposed to be util-ized to remove contamination by Chlorella spp. usually occurring in the cultivation of Spirulina. 相似文献
17.
IwrRODUcrIONBiochewhcalindiasrnaybeusedtoreboresponsestospedccontandnantSincludingheaVyrnetaIs.ChineseshrimpfisheriesarebasedonpenaeidsofWhichPenaeuspoiciIlatusistheddrinantsthe(Xuetal.,l993)incoastalwatersofFujianProvince.Larvalpenaeids(Andelsonetal.,l976)likeotherplanktoniccrustaonns(Clarkl992),arepartioulariysensitivetoheaVymetalcontandnatedwaterduetothefortnationofmetalbindingproteinsintheirbodies.Cytoplasndcproteins,dondnatedbythestilphydrygrouphave~reportedinvariousdassesofphylog… 相似文献
18.
刘静 《中国海洋湖沼学报》1997,15(3):224-226
ImOUocrON0verevoluti0narytirne,intetspeCiliccomPctitioncanresultincharactedisplacementSthatfadiitateresourcepartitioningamongspedesffeper,l985,Wilirarnanayake,l99O).Fisharenotablyopportunisticintheirfeding,toknowWhereandhowtheybowilloftenprovidemoreinsightintotheirerelogythansbolyknowingtheactUalcomPonentSoftheirdiet(Motta,l988,HUmPhrieS,l993).ArmrdinglymorphologicalcomParisonsamongcoxiccutwspchprovidemportantinfonnationnotonlytosySteInatistsfaedwithtaxonondcprobbo,butaIsot0erelogistS… 相似文献
19.
中国海洋湖沼学报 《中国海洋湖沼学报》1999,17(2):187-192
mODUCnONConntinduedmovementofseafloorSandsguailyaffectstheconditionsoftheseafloor,soitisiInP0rtantostUdytheconcentraion,movementandthesuspensionandre-suspensionofParticles.InthishighheqUencyacousticscatteringsystem,a3MHzffe-qUencytransduersendst0theseafloorsounwaves,whosescatteringintensityasthewavesscatterupontouchingsandandsiltcanbemeased;andthemovingconditionsoftheSandcanbehaherdetendned(Guan,l982;Sheng,l988;libicld,l989).SuchacousticscatteringsystemiseffectiveforInarinegeOlogicalst… 相似文献
20.
吴德星 《中国海洋湖沼学报》1997,15(4):314-321
ImODUcnONThedeepequatorialoceanhasobvioussignilicantflowapparentlycarryinghacelsa1ongandacrosstheequator(WissCtal.,l985).RmtfloatmsurementSshoWedthattheflowishigh1yvariable(Richardsonetal.,l993).ThomPsonandKawase(l993)pro-posedthatthelargeinstantaneousandfloatvelocitiesasWellasthevariabilitysuggestthatthetracersignaIsreflCCtreCtificationoftimedependentmotionsandniinginsteadofrneanEulerianflow.TheresultSoftheirstudyonthegenerationofmeancurrentSbyperi-odicfordngintheequatorialoceaninasir… 相似文献