应用化学专业英语 教学课件 作者 黄忠 谢普会 付颖 主编lesson 20 introduction to Pesticide chemistry.ppt

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1、Lesson20IntroductiontoPesticideChemistryCharacteristicsofPesticidesBasicconceptsrelatingtothenames,chemistry,behaviorandfateofPesticidesincludingareviewoftheR8LabelBooksummarypagesPesticideNamesChemicalname*Commonname*Productname*TherearethreenamesassociatedwitheverypesticideSkipdefin

2、itionsPesticideNames:ChemicalNameThesystematicNameofaChemicalCompoundaccordingtotherulesofnomenclatureoftheInternationalUnionofPureandAppliedChemistryasadaptedforindexinginChemicalAbstractsForexample:3,5,6-trichloro-2-pyridinyloxyaceticacid..isachemicalnameReturnPesticideNames:Commo

3、nNameAgenericnameforachemicalcompound(seetheWeedScienceSocietyofAmericalistofherbicidenomenclature)Forexample:Thecommonnamefor3,5,6-trichloro-2-pyridinoxyaceticacid..istriclopyrThecommonnameisthenamegenerallyusedindiscussingpesticidaltoxicologyandenvironmentalbehaviorandfateReturnPest

4、icideNames:ProductNameThetradenameofapesticide;thatisthenameonthecontaineryoupurchase.ItisalsothenametowhichtheEPAregistrationnumberisappliedatthetimeofregistrationTriclopyraloneissoldas:Garlon3AorGarlon4NamesintheR8LabelBookSummarySheetsCommonnamesBrandnames(Ifthechemicalnameisneed

5、ed–seethelabelnotthesummarysheet)AnotherCaution---PronunciationofNamesFORAY4-AAPHORATESomequickdefinitionsSolution*Suspension*-Emulsion*-InvertEmulsion*BypassdefinitionsSomequickdefinitionsSolutionAliquidorsolidchemicalwhichisdispersedcompletely(notsuspended)inwateroranotherfluid.Foro

6、urpurposesthisincludeswatersolutionsandesterorotheroil-solublechemicaldissolvedinoilReturnSomequickdefinitionsSuspensionFinelydividedsolidparticlesorliquiddropletsdispersed(butnotdissolved)inanothersolid,aliquidoragas.ReturnSomequickdefinitionsEmulsionAsuspensionofsmalldropletsofanoil

7、-basedoranesterpesticideinwaterReturnSomequickdefinitionsInvertEmulsionAsuspensionofsmalldropletsofwaterinanoil.SomechemicalsarenowproducedasinvertemulsionsSomequickdefinitionsInvertEmulsionGenerallytheformationofaninvertemulsionsisundesirable.Withoutspecialprecautionsduringmixingandu

8、sethe