Video: Natural roj hmab. Kev piav qhia
2024 Tus sau: Henry Conors | [email protected]. Kawg hloov kho: 2024-02-12 07:52
Natural roj hmab yog lub cev amorphous uas muaj peev xwm ua kom crystallize. Cov khoom siv ntuj (raw) - tsis muaj xim lossis dawb carbon. Cov roj hmab ntuj yog insoluble hauv cawv, dej, acetone thiab lwm yam kua. Nyob rau hauv cov tshuaj tsw qab thiab fatty hydrocarbons (ethers, benzene, roj av, thiab lwm yam), nws swells thiab tom qab yaj. Raws li qhov tshwm sim, cov kev daws teeb meem colloidal yog tsim, uas tau siv dav hauv cov kev xav tau.
Natural roj hmab muaj cov qauv molecular zoo ib yam. Cov khoom muaj cov yam ntxwv ntawm lub cev thiab thev naus laus zis, nws yooj yim ua tiav ntawm cov cuab yeej tsim nyog.
Natural roj hmab muaj lub siab elasticity (elasticity). Cov khoom muaj peev xwm rov qab tau nws cov duab qub thaum lub zog uas ua rau nws deformation tsis ua rau nws. Nws yuav tsum tau hais tias elasticity yog khaws cia nyob rau hauv ib tug ncaj dav kub ntau yam. Txawm li cas los xij, kev cia ntev ntev ua rau cov khoom tawv tawv.
Natural roj hmab ntawm qhov kub ntawm rho tawm ib puas thiab cuaj caum-tsib degrees yog pob tshab thiab nyuaj, ntawm qhov kub ntawm xoom mus rau kaum degrees- opaque thiab tsis yooj yim, ntawm nees nkaum - translucent, elastic thiab mos. Thaum rhuab saum 50˚C, cov khoom yuav ua yas thiab nplaum.
Nws poob nws qhov elasticity ntawm qhov kub ntawm ntau tshaj yim caum degrees, ntawm ib puas thiab nees nkaum degrees nws dhau mus rau hauv lub xeev cov kua resinous, tom qab hardening nws yog tsis yooj yim sua kom tau cov khoom qub. Thaum kub nce mus txog ob puas mus rau ob puas thiab tsib caug degrees, cov roj hmab ntuj pib decompose. Raws li qhov tshwm sim, ntau cov kua thiab cov tshuaj gaseous raug tsim.
Natural roj hmab yog dielectric zoo. Tsis tas li ntawd, cov khoom muaj roj tsawg thiab dej tsis kam.
Cov khoom siv yog maj mam oxidized los ntawm atmospheric oxygen. Cov txheej txheem sai dua nyob rau hauv cov tshuaj oxidizing tshuaj.
Ntxiv rau tag nrho lwm yam khoom, roj hmab muaj plasticity. Nws muaj peev xwm tuav tau daim ntawv uas nws tau txais los ntawm kev cuam tshuam sab nraud. Plasticity, uas manifests nws tus kheej thaum lub sij hawm machining thiab cua sov, yog suav hais tias yog ib tug ntawm cov yam ntxwv ntawm cov khoom. Vim tias cov roj hmab muaj cov khoom elastic thiab yas, nws tseem hu ua cov khoom siv plastoelastic.
Natural roj hmab, nws cov qauv yog (C5H8)n, suav nrog cov molecules uas muaj ntau ntawm ob daim ntawv cog lus. Cov khoom siv yooj yim nkag mus rau hauv tshuaj lom neeg nrog ntau yam tshuaj. Qhov nce reactivity yog vim tsis muaj tshuaj lom neeg ntawm cov khoom. Qhov zoo tshaj plawsKev sib cuam tshuam tshwm sim hauv cov kev daws teeb meem uas cov roj hmab tau sawv cev los ntawm cov molecules ntawm cov khoom loj loj colloidal.
Thaum ncab lossis txias, kev hloov pauv ntawm cov khoom mus rau lub xeev crystalline los ntawm amorphous (crystallization) tau sau tseg. Cov txheej txheem no tshwm sim nyob rau lub sijhawm, tsis yog tam sim ntawd. Crystals muaj qhov me me, cov duab geometric tsis paub meej, thiab lawv cov npoo yog fuzzy.
Pom zoo:
Holy basil, lossis tulsi: piav qhia nrog cov duab, tsos, lub sijhawm paj, txiv hmab txiv ntoo. Cov khoom siv tau zoo, cov txiaj ntsig kho mob, cov lus qhia thiab cov cai rau kev yug me nyuam thiab kev saib xyuas
Tsob ntoo no tsis muaj nuj nqis dais lub npe li. Holy basil muaj ntau yam txiaj ntsig kev noj qab haus huv. Nws yog siv hauv tshuaj thiab ua noj. Koj tuaj yeem loj hlob hauv tsev thiab hauv lub tebchaws. Cov nroj tsuag sprouts nyob rau hauv Is Nrias teb, Iran, Tuam Tshoj, Africa
Russian roj: hom thiab nqe. Lub npe ntawm Lavxias teb sab roj yog dab tsi? Tus nqi ntawm cov roj Lavxias yog dab tsi?
Urals yog qhov xav tau tshaj plaws thiab muaj npe nrov ntawm cov roj hauv tebchaws Russia, uas yog raws li qib siab zoo ntawm cov khoom siv roj av Siberian Lub Teeb. Thaum lub Tsib Hlis 26, 2015, kev lag luam ntawm cov khoom lag luam tau raug kaw ntawm tus nqi ntawm $ 63.95 ib chim
Shamrock cog: piav qhia nrog cov duab, tsos, lub sijhawm paj, txiv hmab txiv ntoo, cov khoom muaj txiaj ntsig, kho cov nyhuv, cov lus qhia thiab cov cai rau kev yug me nyuam thiab kev saib xyuas
Tus sawv cev ntawm cov nroj tsuag ntawm peb lub teb chaws khaws ntau cov nroj tsuag zoo. Shamrock (ua npaws, lossis siv nyom) yog ib qho ntawm cov kev xav zoo li no. Zoo ib yam li clover, tab sis nrog ib tug xov tooj ntawm cov tshuaj. Txog cov nroj tsuag trefoil, daim duab uas yuav paub zoo rau txhua tus, tau tham hauv kab lus no
Iranian roj ntawm lub khw. Qhov zoo ntawm Iranian roj. Iran muab roj rau qhov twg?
Kev tshem tawm thoob ntiaj teb kev rau txim rau Iran tau ntxiv lwm qhov ntawm cov khoom siv hydrocarbon, cov nqi uas twb tau qis heev. Iranian roj ntawm kev ua lag luam txhais tau li cas rau nws, thiab rau cov tuam txhab roj thoob ntiaj teb thiab lub teb chaws ua haujlwm hauv Middle East?
Roj lossis roj av: kev pabcuam tsheb, cov txiaj ntsig thiab kev xaiv roj, cov lus qhia kws tshaj lij
Tus nqi roj av nce ntxiv tsis tso cai rau tus tsav tsheb. Tus nqi roj nce - roj av nce nqi, tus nqi ntawm ib lub thoob roj poob - tus nqi roj tseem nce. Ib qho kev xaiv zoo tshaj rau kev siv cov roj tsheb yog kev teeb tsa cov khoom siv roj. Siv roj los yog roj av? Ntau tus neeg nug lawv tus kheej lo lus nug no. Txawm hais tias pom tseeb qhov zoo ntawm "xiav" roj, cov tswv tsheb tsis nrawm rau nruab LPG