2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
In 1894, Johnson & Johnson tau qhia me nyuam hmoov ua los ntawm crushed talc. Cov pob zeb hauv av tuaj yeem pom nrog asbestos hauv ntiaj teb, ua rau muaj kev txhawj xeeb txog cov khoom talc uas muaj cov tshuaj lom asbestos.
talcum hmoov nyob ib puag ncig ntev npaum li cas?
Cov tuam txhab pib muag talcum hmoov nyob rau xyoo 1800s txhawm rau tiv thaiv thiab txo cov tawv nqaij khaus xws li chafing thiab daim ntaub qhwv pob. Pulverized talc tau paub los ntawm ntau lub npe, suav nrog "cov hmoov tshuaj" thiab "ko taw hmoov." Tab sis nws lub npe nrov tshaj plaws tuaj nrog kev qhia txog Johnson's Baby Powder hauv 1894.
Thaum twg talc tshem tawm ntawm tus me nyuam hmoov?
Nyob rau xyoo 2016, ntau dua 1,000 tus poj niam hauv Tebchaws Meskas tau foob Johnson & Johnson rau kev npog qhov kev pheej hmoo mob qog noj ntshav cuam tshuam nrog nws cov hmoov me me. Lub tuam txhab txwv tsis pub muag cov hmoov me me talc hauv Tebchaws Meskas thiab Canada hauv 2020.
Thaum twg Johnson thiab Johnson tshem tawm talc los ntawm tus me nyuam hmoov?
Ntawm Lub Tsib Hlis 12, 2020, Johnson thiab Johnson thaum kawg tau txiav txim siab tshem tawm ib qho khoom lag luam uas muaj talc ntawm lub khw.
Puas Johnson thiab Johnson tseem siv talc?
JOHNSON'S® Baby Powder, ua los ntawm cov tshuaj pleev ib ce, tau ua lub hauv paus ntawm kev saib xyuas menyuam yaus thiab cov neeg laus saib xyuas tawv nqaij thiab kev pleev xim thoob ntiaj teb rau ntau tshaj ib puas xyoo. … Hnub no, talc tau lees paub tias muaj kev nyab xeeb rau kev siv tshuaj pleev ib ce thiab khoom tu tus kheej thoob plaws ntiaj teb.
Pom zoo:
Puas yog hmoov zoo txhais tau tias hmoov zoo?
Ntawm qhov zoo; qhia kev vam meej yav tom ntej. Lub ntsiab lus ntawm kev zoo siab yog qhov xwm txheej uas yog qhov zoo los yog qhia txog yam zoo tuaj los yog tus neeg muaj hmoo. Ntawm qhov zoo; boding zoo rau yav tom ntej; txaus siab; zoo siab.
Thaum twg daim ntawv tshaj tawm vixaj yuav raug tso tawm?
Lub Yim Hli 26, 2021 Lub Tsev Haujlwm Saib Xyuas Lub Tebchaws Meskas tau tshaj tawm nws daim ntawv tshaj tawm Visa rau Cuaj hlis 2021. Qhov ntawd yog qhov tseem ceeb yog tias koj tab tom tos hnub tseem ceeb ntawm koj tam sim no kom koj daim npav ntsuab tuaj yeem txav mus tom ntej.
Thaum cov hmoov txhuv nplej siab gelatinization tso tawm dab tsi?
Starch gelatinization yog txheej txheem ntawm rhuav tshem cov khoom sib txuas ntawm cov hmoov txhuv nplej siab hauv cov dej thiab cua sov, tso cai rau cov chaw sib txuas ntawm cov hydrogen (cov hydroxyl hydrogen thiab oxygen) mus rau koom nrog dej ntau.
Yuav tsum tau siv cov hmoov talcum rau cov menyuam yaus?
Txawm li cas los xij, kws kho mob qhia cov niam txiv kom tsis txhob siv cov hmoov me me- txawm tias nws yog ua los ntawm talc lossis tsis - rau menyuam yaus thiab menyuam mos. Lub koom haum American Association of Pediatrics pom zoo tawm tsam kev siv cov hmoov me me, lub sijhawm.
Puas talcum hmoov yaj hauv dej?
Talc yog xyaum insoluble hauv dej, dilute ntxhia acids, thiab dilute daws ntawm alkali halides thiab alkaline hydroxides. Nws yog soluble hauv kub concentrated phosphoric acid. Vim li cas talcum hmoov tsis yaj hauv dej? Tsim Hauv Tsev.
