Cov txheej txheem:
- Dab tsi yog txoj hauv kev thiab hom kev cuam tshuam rau PCBs?
- PCBs txuas rau dab tsi?
- Dab tsi yog qhov cuam tshuam rau PCBs hauv tsev kawm?
- PCB cov pa phem yog dab tsi?
Video: Qhov twg ntawm cov no yog qhov chaw ntawm polychlorinated biphenyls (pcbs)?
2024 Tus sau: Fiona Howard | [email protected]. Kawg hloov kho: 2024-01-10 06:38
Roj siv rau hauv cov motors thiab hydraulic systems. Cov khoom siv hluav taws xob qub lossis cov khoom siv uas muaj PCB capacitors . fluorescent teeb ballasts . cable rwb thaiv tsev.
Dab tsi yog txoj hauv kev thiab hom kev cuam tshuam rau PCBs?
- Txoj kev tseem ceeb ntawm kev kis rau PCBs hauv cov pej xeem yog kev noj zaub mov tsis huv, tshwj xeeb yog nqaij, ntses, thiab nqaij qaib.
- Kev ua haujlwm raug rau PCBs tshwm sim feem ntau ntawm kev nqus pa thiab dermal.
PCBs txuas rau dab tsi?
Kev tshawb fawb ntawm PCBs hauv tib neeg tau pom muaj qhov nce ntawm melanomas, mob qog noj ntshav siab, mob qog noj ntshav hauv lub zais zis, mob qog noj ntshav biliary, mob plab hnyuv, thiab mob qog noj ntshav hauv hlwb, thiab tej zaum yuav txuas rau mob qog noj ntshav misPCBs paub tias ua rau ntau hom mob qog noj ntshav hauv nas, nas, thiab lwm yam tsiaj kawm.
Dab tsi yog qhov cuam tshuam rau PCBs hauv tsev kawm?
pom qhia tias qhov chaw ntawm PCBs hauv tsev kawm ntawv feem ntau yog plasticizers hauv caulk thiab fluorescent teeb ballasts txawm hais tias lwm yam khoom kuj tseem yog qhov chawCov chaw thib ob uas tau kis los ntawm cov hauv paus ntsiab lus suav nrog cov xim, plua plav, masonry, pem teb, thiab qab nthab (Thomas li al. 2012).
PCB cov pa phem yog dab tsi?
PCBs, lossis polychlorinated biphenyls, yog khoom lag luam lossis tshuaj. … Qee zaus, cov dej nchuav thiab dej los ntawm cov chaw no lossis hluav taws xob hloov pauv tuaj yeem ua rau PCBs nkag mus rau ib puag ncig. PCBs tuaj yeem pom thoob ntiaj teb.
Pom zoo:
Qhov twg yog qhov chaw ntawm lub ntiaj teb cov tsev kawm qub tshaj plaws?
Qhov qub tshaj plaws uas twb muaj lawm, thiab txuas ntxiv ua haujlwm hauv lub ntiaj teb yog University of Karueein, nrhiav tau hauv 859 AD hauv Fez, Morocco Lub Tsev Kawm Ntawv ntawm Bologna, Ltalis, tau tsim xyoo 1088 thiab yog qhov qub tshaj plaws nyob hauv Europe.
Ntawm qhov sib npaug ntawm qhov sib npaug ntawm cov reactants) thiab cov khoom) yog qhov tas li?
Nyob rau hauv ib qho tshuaj sib npaug, cov tshuaj tiv thaiv rau pem hauv ntej thiab thim rov qab Cov tshuaj tiv thaiv rov qab yog ib qho reaction uas hloov dua siab tshiab ntawm reactants rau cov khoom thiab hloov cov khoom rau reactants tshwm sim ib txhij … Hauv qhov rov qab cov tshuaj tiv thaiv, hydrogen iodide decomposes rov qab rau hauv hydrogen thiab iodine.
Qhov twg yog qhov chaw uas cov kua qaub ncaug rov qab mus rau cov ntshav?
Lim cov kua dej lim dej ces txav mus rau qhov loj lymphatic ducts lymphatic ducts Ib lub qog ntshav yog lub lymphatic hlab ntsha loj uas tso cov qog ntshav mus rau hauv ib qho ntawm cov hlab ntsha subclavianMuaj ob lub qog ntshav hauv lub cev - txoj cai lymphatic duct thiab lub thoracic duct.
Qhov twg thiab thaum twg yog qhov chaw ua haujlwm ntawm thawj kws kho mob kws kho mob tau tsim?
Nyob rau hauv 44 BC, ntawm thawj qhov keeb kwm ntawm kev tshuaj ntsuam xyuas kab mob tshwm sim tam sim ntawd tom qab lub sleighing ntawm Julius Caesar los ntawm nws cov neeg koom tes. Tus kws tshuaj xyuas lub sijhawm ntawd xaus lus tias ntawm 23 qhov txhab pom ntawm lub cev tsuas yog ib tus neeg tuag xwb .
Qhov chaw ntawm enzymatic tawg ntawm cov khoom phagocytized nyob qhov twg?
C - LYSOSOMES: Qhov chaw ntawm enzymatic tawg ntawm phagocytized cov ntaub ntawv THIAB Qhov chaw ntawm cell autolysis . Lub organelle twg yog qhov chaw ntawm kev sib txuas ntawm lipid thiab steroid molecules? The endoplasmic reticulum (ER) yog qhov chaw tseem ceeb rau lipid synthesis .
