2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
Selenium hexasulfide yog cov tshuaj sib xyaw nrog cov mis Se₂S₆. Nws cov qauv molecular muaj ib lub nplhaib ntawm ob lub selenium thiab rau sulfur atoms, piv rau S₈ allotrope ntawm leej faj thiab lwm cov selenium sulfides nrog mis SeₙS8-ₙ.
Se4S4 lub npe yog dab tsi?
Lub npe sib xyaw ntawm Se4S4 yog tetraselenium tetrasulfide. Nws yog ib qho sulfide-chav kawm selenium compound thiab muaj xim liab thiab cov khoom crystalline zoo li.
YPuas yog selenium yog hlau?
Selenium yog a metalloid (ib lub ntsiab lus nruab nrab hauv cov khoom ntawm cov hlau thiab cov nonmetals). Daim ntawv grey, xim hlau ntawm lub caij yog qhov ruaj khov tshaj plaws nyob rau hauv cov xwm txheej zoo tib yam; daim ntawv no muaj cov cuab yeej txawv txav ntawm kev nce hauv hluav taws xob conductivity thaum raug lub teeb.
Selenium pom hauv lossis siv rau dab tsi?
Selenium yog siv los ua pigments rau ceramics, xim thiab plastics. Selenium muaj ob qho tib si kev ua haujlwm photovoltaic (hloov lub teeb rau hluav taws xob) thiab kev ua haujlwm photoconductive (hluav taws xob tsis kam txo qis nrog nce illumination). Nws yog vim li no muaj txiaj ntsig zoo hauv photocells, hnub ci hlwb thiab tshuab luam ntawv.
Puas selenium nyab xeeb noj txhua hnub?
Thaum noj los ntawm qhov ncauj: Selenium yog qhov muaj kev nyab xeeb rau tib neeg feem coob thaumnoj los ntawm qhov ncauj hauv koob tshuaj tsawg dua 400 mcg ib hnub, luv luv. Txawm li cas los xij, selenium yog POSSIBLY UNSAFE thaum noj los ntawm qhov ncauj hauv koob tshuaj ntau lossisntev. Kev noj tshuaj ntau dua 400 mcg tuaj yeem ua rau muaj kev pheej hmoo ntawm kev tsim cov tshuaj selenium.
Pom zoo:
Puas yog cov dab dab dab dab dab dab dab dab dab dab dab dab?
Myth: Ib tug dab tshos tsis yog neeg ncaj ncees yog tiasnws haum yog. Fact: Tu siab, qhov no yog ib lo lus tsis tseeb uas tau raug perpetuated los ntawm aversive trainers. Txawm hais tias haum rau lub caj dab kom zoo khawb rau hauv cov tawv nqaij rhiab nyob ib ncig ntawm lub caj dab, uas ua rau muaj kev puas tsuaj loj rau cov thyroid, esophagus, thiab trachea.
Dab tsi yog cov lus qhia los ntawm cov dab rau macbeth?
Ntawm no yog cov ntsiab lus nrawm ntawm qhov tshwm sim hauv kev ua si. Tom qab kev sib ntaus sib tua hauv Scotland, Macbeth thiab nws tus phooj ywg Banquo ntsib peb tus dab, uas ua peb zaj lus faj lem - Macbeth yuav yog tus, Macbeth yuav ua vajntxwv thiab Banquo cov tub yuav ua vajntxwv.
Yuav ua li cas txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau pom kev pom?
Txawm li cas los xij, corneal collagen cross-linking - cov txheej txheem qib siab tau pom zoo los ntawm US Food and Drug Administration (FDA) hauv xyoo 2016 - tuaj yeem txhim kho qhov pom kev hauv cov neeg mob txhua hnub nyoog. Corneal collagen cross-linking (CXL) tsis yog kho rau keratoconus, tab sis nws tuaj yeem pab tiv thaiv tus mob kom tsis txhob mob hnyav.
Dab tsi yog cov reactants thiab cov khoom ntawm cov tshuaj tiv thaiv rau pem hauv ntej (sab laug-rau-txoj cai)?
Dab tsi yog cov reactants thiab cov khoom ntawm cov tshuaj tiv thaiv rau pem hauv ntej (sab laug-rau-txoj cai)?Glucose thiab Fructose yog cov reactants. Sucrose thiab Dej yog cov khoom. Puas yog cov tshuaj tiv thaiv tom ntej yog cov tshuaj tiv thaiv condensation lossis cov tshuaj tiv thaiv hydrolysis?
Puas yog cov dab dab dab dab dab dab tau them?
OHL cov neeg ua si tsis tau nyiaj hli, vim lawv tsis raug lees paub tias yog cov neeg ua haujlwm raws li Txoj Cai Kev Ua Haujlwm. Txawm li cas los xij, lawv suav nrog cov txiaj ntsig xws li nyiaj rov qab txhua xyoo, tag nrho cov nqi kawm ntawv them, thiab daim pib pub dawb.
