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Xov xwm

Siv thiab Ceev faj Txog DEET

DEET kuj tseem hu ua N, n-diethyl-m-toluidamide. DEET tau tsim thawj zaug thaum Tsov Rog Ntiaj Teb Zaum II thiab tsim los ntawm Asmeskas Lub Tsev Haujlwm Saib Xyuas Kev Ua Liaj Ua Teb. Nws tau siv los ntawm Asmeskas tub rog nyob rau xyoo 1946 thiab tau sau npe rau pej xeem siv hauv Tebchaws Meskas hauv xyoo 1957. Nws tau raug muag hauv khw raws li tshuaj yoov tshaj cum tus kheej txij li xyoo 1965.

Ze li ntawm 70 xyoo ntawm kev tshawb fawb tau qhia tias DEET muaj cov tshuaj tua kab rau ntau yam yoov tshaj cum (yoov tshaj cum, yoov, dev mub, Chigger Mites, midges, thiab lwm yam) thiab tuaj yeem tiv thaiv yoov tom. Txawm li cas los xij, nws tsis muaj txiaj ntsig zoo rau muv, Solenopsis invicta, kab laug sab thiab lwm yam kev tiv thaiv tus kheej kom txhob tom, vim tias lawv txawv ntawm cov ntshav nqus cov pob txha, thiab lawv xav tso tseg qhov kev coj ua phem no tshwj tsis yog siv tshuaj tua kab lossis hluav taws xob yoov tshaj cum thiab lwm txoj hauv kev.

Mechanism Ntawm Kev Ua

Lub tswv yim ntawm DEET tseem tsis tau meej. Nws tau xub xav tias nws tuaj yeem tiv thaiv cov ntshav nqus kab los ze rau tib neeg lub cev los ntawm kev ua kom muaj ntxhiab tsw ntxhiab.

Txawm li cas los xij, DEET tuaj yeem tiv thaiv cov tshuaj electrophysiological ntawm yoov tshaj cum rau lactic acid thiab 1-octen-3-ol sib txuas, npog ntsej muag lossis thaiv qhov ua haujlwm tsis zoo ntawm yoov tshaj cum, thiab tiv thaiv kev lees paub ntawm kev tsim cov tsiaj txhu.

Tom qab ntawd, nws tau pom tias DEET ncaj qha ua haujlwm tshwj xeeb rau cov neurons tshwj xeeb hauv lub antennae ntawm yoov tshaj cum thiab ua rau cov tshuaj tua kab, tab sis tsis txwv qhov kev nkag siab ntawm lactic acid, CO2 thiab 1-octen-3-ol.

Qhov kev tshawb fawb zaum kawg tseem pom tias kev sib xyaw ntawm DEET thiab qee lub hom phiaj ntawm lub cev yog thawj qhov tshuaj tiv thaiv kab mob biochemical txhawm rau txheeb xyuas cov tshuaj sab nraud, tab sis cov kev tshawb pom no yuav tsum tau tshawb xyuas tom qab.

Siv thiab Ceev faj

Kev ruaj ntseg
Feem ntau, DEET muaj kev nyab xeeb siab thiab muaj tshuaj lom tsawg. Cov kev tshawb fawb tam sim no qhia tias DEET tsis muaj kab mob qog noj ntshav, teratogenic thiab cuam tshuam kev loj hlob. Lub Chaw Tiv Thaiv thiab Tiv Thaiv Kab Mob (CDC) pom zoo tias cov poj niam cev xeeb tub thiab pub niam mis siv DEET (tib yam li cov neeg laus tsis cev xeeb tub) kom tsis txhob yoov tshaj cum tom thiab txo kev pheej hmoo kis mob. Nyob rau tib lub sijhawm, American Academy of Pediatrics (AAP) pom zoo tias cov menyuam mos hnub nyoog tshaj 2 hlis siv 10% - 30% DEET, uas muaj kev nyab xeeb thiab muaj txiaj ntsig zoo, thiab yuav tsum tsis txhob siv ntau dua ib zaug ib hnub. Nws tsis haum rau menyuam mos hnub nyoog qis dua 2 hlis

Ua tau zoo
Cov ntsiab lus ntawm DEET hauv khw yog los ntawm 5% txog 99%, thiab nws tau pom tias cov tshuaj tua kab ntawm 10% txog 30% DEET zoo ib yam. Txawm li cas los xij, lub sijhawm muaj txiaj ntsig ntawm DEET ntawm qhov sib txawv sib txawv tau txawv. 10% tuaj yeem muab kwv yees li 2 teev sijhawm tiv thaiv, thaum 24% tuaj yeem muab sijhawm txog 5 teev ntawm kev tiv thaiv. Ib qho ntxiv, ua luam dej, tawm hws, so thiab nag tuaj yeem ua rau lub sijhawm tiv thaiv DEET luv. Hauv qhov no, DEET nrog qhov siab dua tuaj yeem xaiv.

Nws yuav tsum tau sau tseg tias ntau dua 30% DEET tsis tuaj yeem ua kom lub sijhawm tiv thaiv ntau ntxiv, tab sis tuaj yeem tshwm rau ntawm daim tawv nqaij, cov hlwv thiab lwm cov tsos mob ntawm daim tawv nqaij ua rau khaus khaus, thiab tseem tuaj yeem muaj peev xwm ua rau lub cev tsis zoo.


Post lub sij hawm: 01-06-21

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24 Teev Sijhawm Online

Rau kev nug txog peb cov khoom lossis daim ntawv teev npe, thov tawm koj tus email rau peb thiab peb yuav kov tsis pub dhau 24 teev.

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