2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
Ethanethiol (EM), feem ntau hu ua ethyl mercaptan yog siv hauv Liquefied petroleum gas (LPG), thiab zoo li tsw ntawm leeks, dos, durian, los yog zaub qhwv. Methanethiol, feem ntau hu ua methyl mercaptan, yog ntxiv rau cov pa roj carbon monoxide, feem ntau hauv cov khoom sib xyaw uas muaj methane.
mercaptan ntxiv cov nkev ntuj nyob qhov twg?
Nws yog ntxiv raws li kev ntsuas kev nyab xeeb los xyuas kom meej tias cov pa roj carbon monoxide tsis tuaj yeem mus nrhiav tsis tau. Nws yog cov organic gas uas muaj cov pa roj carbon, hydrogen, thiab sulfur. Mercaptan pom naturally nyob rau hauv cov kab mob nyob, suav nrog tib neeg lub cev uas nws yog cov khoom pov tseg ntawm cov metabolism.
Puas yog tag nrho cov nkev ntuj muaj mercaptan?
Natural gas hauv nws lub xeev tsis muaj xim thiab tsis muaj ntxhiab. Mercaptan yog cov khoom siv ntxiv uas tau ntxiv rau cov pa roj carbon monoxide kom nws yooj yim dua los kuaj xyuas thaum muaj cov pa xau. Qhov tseem ceeb tshaj plaws kom paub txog mercaptan yog nws stinks. … Thiab nws tsuas yog siv ob peb feem ntawm ib lab ntawm mercaptan kom muab cov pa roj ntuj tsw qab.
Vim li cas mercaptan siv hauv LPG?
Cov tshuaj siv nyob rau hauv ob qho tib si propane thiab natural gas - ob qho tib si uas tsis muaj ntxhiab tsw - los pab txheeb xyuas qhov xau. … Vim propane hnyav dua huab cua, nws thiab Ethyl Mercaptan sau qhov chaw qis ntawm ib chav ua ntej, nce mus rau pem hauv ntej thaum tso roj ntau dua.
Vim li cas thiaj muaj ntxhiab ntxiv rau cov pa roj ntsha?
Cov tshuaj tsw qab no ntxiv rau kev tiv thaiv kev nyab xeeb,as natural gas nyob rau hauv nws ntshiab lub xeev tsis muaj ntxhiab kiag li. Cov tshuaj no ntxiv cov yam ntxwv "gas" tsis hnov tsw uas tuaj yeem txheeb xyuas tau ntawm qhov ntau ntawm tsuas yog 1%, txo qhov kev pheej hmoo ntawm kev xau yuav mus tsis pom thiab cov pa roj yuav nce mus rau qib txaus ntshai.
Pom zoo:
Nyob rau hauv c ++ cov kev qhia tshwj xeeb siv tau rau qhov twg hauv qab no?
Kev piav qhia: Cov kev qhia tshwj xeeb tuaj yeem siv tau rau cov tswv cuab cov ntaub ntawv thiab cov haujlwmvim tias lawv yuav tsum nkag mus rau sab nraud ntawm qhov thaiv. 4. Yuav ua li cas nkag tau rau hauv qab no yog siv tau? Kev piav qhia:
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 ntawm cov hauv qab no siv rau hauv cov hlau nplaum?
Cov khoom siv siv rau cov hlau nplaum muaj xws li: Hlau.Brass. Dab tsi yog magnetic chuck siv rau? Magnetic chucks muab a ib txwm clamping siabuas ua kom tsis muaj qhov hloov pauv hauv qhov nruj npaum li cas los yog xoob ntawm cov khoom tuav, qhov tuav no txhim kho kev nyab xeeb ntawm tus neeg siv.
Vim li cas cov alloys siv hauv cov khoom siv hluav taws xob cua sov?
Raws li peb paub alloys muaj siab resistivity thiab siab melting point piv rau cov hlau ntshiab. Yog li cov hlau tsis tuaj yeem yooj yim hlawv lossis oxidize ntawm qhov kub siab dua. Tam sim no raws li peb xav kom kub siab dua hauv cov khoom siv cua sov yog li peb siv cov alloys hauv cov khoom siv cua sov.
Vim li cas cov phiaj xwm tseem ceeb siv rau hauv kev siv nyiaj txiag thiab kev kwv yees?
Lub Rooj Milestones yog ib qho tseem ceeb tshaj plaws hauv koj txoj kev npaj ua lag luam. Nws teeb txoj kev npaj rau hauv cov tswv yim, cov ntsiab lus tseem ceeb, nrog cov peev txheej tiag, hnub kawg, thiab kev tswj xyuas lub luag haujlwm. Nws pab koj ua kom pom tseeb thaum koj tab tom sau koj txoj kev npaj ua lag luam, thiab tom qab ntawd, cov lus Milestones thiab cov phiaj xwm-vs.
