2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
Siv asbestos peaked nyob rau hauv lig 1960s thiab thaum ntxov 1970s, thaum ntau tshaj 3,000 daim ntawv thov kev lag luam lossis cov khoom tau teev tseg. Asbestos tau siv rau hauv vov tsev, thermal thiab hluav taws xob rwb thaiv tsev, cement yeeb nkab thiab cov ntaub ntawv, flooring, gaskets, kev sib txhuam cov ntaub ntawv, txheej, plastics, textiles, ntawv, thiab lwm yam khoom.
Thaum twg asbestos pib siv hauv tsev?
Asbestos tau siv dav hauv kev tsim vaj tsev los ntawm thaum ntxov 1940s txog rau xyoo 1970s ua cov khoom siv hluav taws kub zoo thiab pheej yig thiab thermal thiab acoustic insulator. Tam sim no paub tias qhov ntev ntev ntawm cov fibers asbestos tuaj yeem ua rau mob ntsws.
Thaum twg asbestos thawj zaug siv hauv UK?
keeb kwm ntawm asbestos nyob rau hauv UK hnub rov qab mus rau lig 1870sthaum siv cov khoom pib, feem ntau ntawm cov nkoj, lub tshuab hluav taws xob thiab hauv hluav taws xob tsim cov nroj tsuag. Los ntawm thaum ntxov 1900s qhov txaus ntshai ntawm asbestos pib paub - tseem tsis tau txog rau xyoo 1999 thaum txhua hom asbestos raug txwv hauv UK.
Thaum twg asbestos siv hauv cov phab ntsa plaster?
Peb hom plaster niaj hnub no muaj xws li:
Txog thaum nruab nrab-1980s, asbestos feem ntau tau ntxiv rau plaster. Nws yog ib txoj hauv kev pheej yig los ua kom cov plaster lub peev xwm los thaiv cov tsev thiab tiv thaiv hluav taws.
Thaum twg asbestos thawj zaug txaus ntshai?
A chronology ntawm kev tshawb pom kho mob
1925: Thomas Oliver npib lo lus "asbestosis".1930: Edward Merewether lees paub tias kev nqus cov plua plav asbestos tuaj yeem ua rau mob tuag taus.
Pom zoo:
Thaum twg siv los yog tsis siv?
Ib leeg: ib leeg txhais tau tias "ib ntawm ob"; tsis txhais hais tias "tsis muaj ntawm ob." Siv cov lus qhia ib leeg. Ib yam ua ke nrog lossis; tsis yog ua ke nrog los yog. Koj hais kuv los tsis yog kuv thiab? Tsis yog grammatically tseeb.
Thaum twg siv i.e. thiab thaum twg siv xws li?
I.e. yog ib qho luv luv rau kab lus id est, uas txhais tau tias "uas yog." I.e. yog siv los rov hais dua ib yam dab tsi uas tau hais yav dhau los txhawm rau kom meej nws lub ntsiab lus. E.g. luv luv rau exempli gratia, uas txhais tau tias "
Thaum twg siv polyacrylamide thiab thaum twg agarose?
Agarose gels siv nrog DNA, vim qhov loj ntawm biomolecules (DNA feem ntau yog ntau txhiab kDa). Rau cov protein gels, polyacrylamide muab daws teeb meem zoo, raws li qhov me me me (50 kDa yog qhov raug) zoo dua rau qhov sib txawv ntawm cov gel.
Thaum twg siv cov khoom siv?
Throughput yog hais txog ntau npaum li cas cov ntaub ntawv tuaj yeem xa los ntawm ib qhov chaw mus rau lwm qhov hauv lub sijhawm. Nws yog siv los ntsuas qhov kev ua tau zoo ntawm hard drives thiab RAM , nrog rau kev sib txuas hauv Is Taws Nem thiab network.
Thaum twg siv los yog siv?
Siv yog yav dhau los thiab yav dhau los kev koom tes ntawm kev siv. Yog li ntawd, kev siv nyiaj qhia txog qhov kev ua tam sim no thaum siv siv qhia txog qhov ua dhau los. Qhov no tuaj yeem pom tau tias qhov sib txawv tseem ceeb ntawm kev siv Piv txwv: