Video: Cov thawv dab tsi yog BPA dawb?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
A khoom uas yog BPA dawb yog ib qho uas tsis siv cov organic compound Bisphenol A hauv nws qhov kev tsim kho. Yav dhau los muaj ntau yam yas cov khoom xws li cov me nyuam lub raj mis, cov phaj yas thiab cov tais diav, cov thawv ntim khoom thiab lub raj mis haus tau siv BPA.
Tom qab ntawd, cov thawv yas twg yog BPA dawb?
BPA - dawb cov khoom iav thiab stainless hlau ntim nrog tsis muaj yas cov ntaub hauv ob sab phlu. Cib-shaped cardboard cartons (zoo li lub thawv kua txiv) siv rau ntim khoom noj. Cartons ua los ntawm Tetra Pak lossis SIG Combibloc tsis muaj BPA . Nrhiav cov npe hauv qab ntawm lub thawv.
Tsis tas li, koj tuaj yeem qhia tau li cas yog tias lub thawv yog BPA dawb? Yuav qhia li cas yog Yas yog BPA Dawb
- Tig lub raj mis los yog lub thawv rau pem hauv ntej, thiab saib hauv qab kom pom seb nws puas muaj cov ntawv pov thawj yas yas (feem ntau hu ua recycling code).
- Yog tias koj pom 1, 2, 4, 5, lossis 6, koj tuaj yeem yooj yim xav tias lub raj mis lossis lub thawv yog BPA dawb.
Ib yam li ntawd, nws tau nug, puas yog BPA dawb yas tiag tiag?
Cov " BPA - dawb "labels rau yas fwj ua ib qho kev lees paub tias cov khoom yog nyab xeeb haus tawm ntawm. Tab sis kev tshawb fawb tshiab ntxiv rau cov pov thawj loj hlob uas BPA - dawb lwm txoj yuav tsis zoo li nyab xeeb raws li cov neeg siv khoom xav. Cov kws tshawb nrhiav pom tias hauv cov nas, BPA Kev hloov pauv ua rau cov phev suav tsawg thiab cov qe tsis muaj peev xwm.
Puas yog Ziploc ntim BPA dawb?
SC Johnson tus Ziploc ® Brand Bags thiab Ntim yog BPA dawb . Peb cov khoom raug soj ntsuam ntau rau kev tshuaj lom thiab kev nyab xeeb thiab ua raws li cov kev cai zoo thiab kev nyab xeeb. Ntau cov ntawv ceeb toom ntawm qhov kev tshawb fawb no tau sau tseg tias cov tshuaj no feem ntau pom muaj nyob hauv cov khoom noj khoom haus yas ntim.
Pom zoo:
Dab tsi yog cov khoom dawb poob los ntawm cov ntoo?
Cov fluffy dawb "parachutes" yog cov txiv hmab txiv ntoo capsule nrog ntau "hair" noob los ntawm Salicaceae tsev neeg ntawm cov ntoo. Thaum lawv pom ntau heev thiab nquag cem rau cov tsos mob ua xua, tus neeg mob ua xua feem ntau yuav ua rau pom tsis tshua pom (microscopic loj) paj ntoos hauv huab cua
Dab tsi theem ntawm cov teeb meem yuav siv cov duab ntawm nws lub thawv?
Ua kua Ua kom pom qhov no, yam khoom dab tsi tsis coj cov duab ntawm nws lub thawv? khov: A yam khoom uas khaws cia nws loj thiab puab tsis muaj ib thawv ; a yam khoom nws cov molecules tsis tuaj yeem txav mus los tsuas yog vibrate.
Dab tsi yog qhov tseem ceeb tshaj plaws uas yuav tsum muaj rau cov kua dej ntws hauv cov kav dej Dab tsi lwm yam cuam tshuam rau cov dej ntws?
Thaum ib qho kev quab yuam sab nraud yog exerted rau ntawm cov kua uas muaj, qhov tshwm sim siab yog kis sib npaug thoob plaws hauv cov kua. Yog li txhawm rau kom dej ntws, dej xav tau qhov sib txawv siab. Cov kav dej kuj tuaj yeem cuam tshuam los ntawm cov kua dej, cov yeeb nkab loj, qhov kub thiab txias (cov kav dej khov), cov kua dej ntom ntom
Dab tsi yog cov cuab yeej hlau siv los tuav cov thawv kub?
Lub tshuab nqus tsev vacuum
Dab tsi yog txoj kev pub dawb rau cov molecules hauv cov roj zoo tagnrho?
Hauv cov pa roj, cov molecules sib tsoo nrog ib leeg. Momentum thiab lub zog tau txais kev cawmdim hauv cov kev sib tsoo no, yog li txoj cai roj zoo tagnrho tseem siv tau. Qhov txhais tau tias dawb txoj kev λ yog qhov nruab nrab ntawm qhov kev ncua deb ib qho kev mus los ntawm kev sib tsoo. Yog hais tias 2 hais, txhua lub vojvoog R, tuaj nyob rau hauv 2R ntawm ib leeg, ces lawv sib tsoo