Cov Txuj Ci Chromatography Roj Hauv Kev Tshuaj Xyuas Tshuaj Gas chromatography (GC) yog ib qho tseem ceeb ntawm kev sib cais thiab kev tshuaj xyuas hauv kev tshuaj xyuas niaj hnub no. Txoj kev no yog siv los cais, txheeb xyuas, thiab ntsuas cov khoom sib xyaw, tshwj xeeb tshaj yog cov tshuaj volatile uas ruaj khov ntawm qhov kub thiab txias tshwj xeeb. Vim nws qhov tseeb siab, lub sijhawm tshuaj xyuas sai, thiab... Nyeem ntxiv
Kev Siv Cov Tshuaj Phenol Ua Tshuaj Tua Kab Mob Cov tshuaj Phenol yog ib pawg tshuaj organic uas paub ntev txog lawv cov tshuaj tua kab mob. Hauv kev kho mob, phenol thiab nws cov khoom siv yog cov hauv paus tseem ceeb hauv kev tswj kev kis kab mob, tshwj xeeb tshaj yog thaum ntxov ntawm cov tshuaj tua kab mob niaj hnub no. Txawm hais tias lawv siv tam sim no tau hloov pauv los ntawm cov tshuaj tua kab mob uas muaj kev nyab xeeb dua thiab zoo dua,... Nyeem ntxiv
Cov Tshuaj Hydrocarbon Yog Dab Tsi? Cov tshuaj hydrocarbon yog ib qho ntawm cov pab pawg tseem ceeb tshaj plaws ntawm cov tshuaj lom neeg hauv lub neej niaj hnub no. Peb cuam tshuam nrog cov khoom lag luam los ntawm cov hydrocarbons yuav luag txhua hnub, los ntawm roj tsheb thiab roj ua noj rau cov roj av cav thiab txawm tias cov khoom siv raw rau cov yas. Vim yog lawv lub luag haujlwm tseem ceeb, kev nkag siab txog cov hydrocarbons yog dab tsi, lawv cov qauv, thiab lawv cov hom yog qhov tseem ceeb. ... Nyeem ntxiv
Cov txiaj ntsig ntawm Maillard Reaction hauv Kev Ua Noj Ua Haus Hauv ntiaj teb ua noj ua haus, ntau cov txheej txheem tshuaj lom neeg tshwm sim thaum cov zaub mov raug cua sov. Qee qhov ntawm cov txheej txheem no ua rau muaj kev hloov pauv hauv cov qauv, aroma, thiab saj uas ua rau cov zaub mov qab dua. Ib qho ntawm cov tshuaj tiv thaiv tseem ceeb tshaj plaws, feem ntau tham los ntawm cov kws ua zaub mov thiab cov kws tshaj lij zaub mov, yog Maillard Reaction. Cov tshuaj tiv thaiv no yog "zais cia" tom qab ... Nyeem ntxiv
Nkag Siab Txog Kev Sib Xyaws Thiab Kev Ua Kom Tawg Hauv chemistry, kev ua kom tawg yog kev hloov pauv uas cuam tshuam nrog cov tshuaj pib (reactants) tsim cov tshuaj tshiab (khoom). Cov kev hloov pauv no tuaj yeem tshwm sim ntuj lossis los ntawm cov txheej txheem tsim hauv chav kuaj lossis kev lag luam. Ntawm ntau hom kev ua kom tawg tshuaj, kev ua kom tawg thiab kev ua kom tawg yog cov yooj yim tshaj plaws thiab feem ntau tham txog. Ob qho tib si… Nyeem ntxiv
Cov Txheej Txheem Oxidation thiab Txo hauv Electrochemistry Electrochemistry yog ib ceg ntawm chemistry uas kawm txog kev sib raug zoo ntawm cov tshuaj tiv thaiv thiab hluav taws xob. Hauv electrochemistry, lub tswv yim tseem ceeb tshaj plaws uas tshwm sim tas li yog oxidation thiab txo qis (redox) cov tshuaj tiv thaiv. Los ntawm cov tshuaj tiv thaiv redox, cov electrons tuaj yeem txav mus los ntawm ib yam khoom mus rau lwm qhov. Qhov kev hloov pauv electron no ua haujlwm ua "choj" ntawm kev hloov pauv ... Nyeem ntxiv
Kev Siv Cov Tshuaj Ether Ua Tshuaj loog Cov tshuaj ether yog ib chav kawm ntawm cov tshuaj organic nrog cov qauv tshwj xeeb uas muaj cov pa oxygen txuas ob pawg alkyl lossis aryl, feem ntau sau ua R-O-R'. Hauv keeb kwm ntawm kev tshawb fawb kho mob, ether tau ua lub luag haujlwm tseem ceeb vim tias nws yog ib zaug nrov heev thiab hloov pauv tshuaj loog. Txawm hais tias nws siv tam sim no dav ... Nyeem ntxiv
Cov txiaj ntsig thiab kev phom sij ntawm cov tshuaj chlorine Cov tshuaj chlorine yog ib yam tshuaj uas paub zoo hauv lub neej txhua hnub, feem ntau yog vim nws siv ua tshuaj tua kab mob thiab tshuaj dawb. Hauv lub rooj teev sijhawm, chlorine muaj lub cim Cl thiab yog ib tug tswv cuab ntawm pawg halogen. Thaum sov chav tsev, chlorine ntshiab yog cov roj daj-ntsuab nrog lub ntxhiab tsw qab. Txawm hais tias feem ntau suav tias yog "tshuaj lom neeg txaus ntshai," qhov tseeb ... Nyeem ntxiv
Kev Siv Cov Tshuaj Polymer Hauv Lub Neej Polymers yog ib pawg ntawm cov tshuaj lom neeg uas muaj feem cuam tshuam nrog lub neej niaj hnub no. Yuav luag txhua yam peb kov - los ntawm cov hlab dej haus thiab khaub ncaws mus rau cov khoom siv kho mob thiab txawm tias cov khoom siv hauv tsheb - muaj feem cuam tshuam nrog polymers. Hauv kev hais yooj yim, polymers tuaj yeem txhais tau tias yog cov molecules loj (macromolecules) uas muaj cov chav me me, rov ua dua hu ua monomers. Thaum… Nyeem ntxiv
Lub Luag Haujlwm thiab Kev Siv Cov Tshuab Microscopes Hluav Taws Xob Cov tshuab microscopes yog ib qho cuab yeej tseem ceeb hauv kev txhim kho kev tshawb fawb, ua rau tib neeg pom cov khoom me me uas tsis tuaj yeem pom nrog lub qhov muag liab qab. Thaum lub teeb (optical) microscopes twb tau siv dav hauv tsev kawm ntawv thiab chaw soj nstuam, cov tshuab microscopes hluav taws xob muab cov thev naus laus zis zoo dua rau kev qhia cov qauv ntxaws ntxaws ntawm cov khoom ... Nyeem ntxiv