Video: Cov xim dyes ua li cas?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Feem ntau ntawm ntuj dyes Nws yog muab los ntawm cov nroj tsuag: keeb kwm, berries, bark, nplooj, ntoo, fungi thiab lichens. Feem ntau dyes yog hluavtaws, i.e., yog txiv neej- ua los ntawm petrochemicals.
Raws li txoj cai, Dye tsim li cas?
Ntuj dyes yog ua los ntawm cov nroj tsuag thiab cov zaub mov, ces yog ua ke nrog starches thiab seaweed kom paub tseeb tias nws yuav siv sij hawm rau cov khoom. Synthetic dyes feem ntau yog ua los ntawm thee tar thiab roj av. Lawv sib txawv heev vim hais tias cov ntaub ntawv sib txawv xav tau cov tshuaj sib txawv los ua tus xim ua raws.
Tom qab ntawd, lo lus nug yog, vim li cas cov organic dyes muaj xim zoo nkauj? 4.6. Organic dyes feem ntau brighter thiab muaj zog tshaj inorganic colorants. Tsis zoo li feem ntau organic cov khoom xyaw, dyes muaj xim vim lawv (Abrahart, 1977): 1. nqus lub teeb nyob rau hauv qhov pom spectrum (400–700 nm);
Kuj paub, vim li cas cov dyes muaj xim?
Cov xim ntawm xim yog tshwm sim los ntawm absorbance ntawm electromagnetic hluav taws xob. Yog hais tias ib feem ntawm qhov nkhaus no yog nyob rau hauv qhov pom, qhov xim yuav tshwm xim . Lub teeb dawb yog qhov sib xyaw ntawm wavelengths. Ib txhia ntawm no muaj kev sib raug zoo rau lub zog nyob rau hauv lub delocalised electron huab ntawm lub xim molecule.
Cov dyes thiab pigments tuaj qhov twg?
Lawv yog cov khoom siv tsis sib xws uas yuav tsum tau muab sib xyaw nrog cov hlua khi lossis cov tsheb thauj mus rau hauv lub substrate. Pigments feem ntau tau los ntawm minerals, tab sis lawv kuj yuav ua tau synthetically. Pigments yog siv nyob rau hauv cov xim, inks, plastics, fabrics, tshuaj pleev ib ce, thiab zaub mov, rau npe ob peb yam piv txwv.
Pom zoo:
Vim li cas cov xim cuam tshuam pom tseeb rau cov yeeb yaj kiab nyias dua li cov yeeb yaj kiab tuab?
Kev cuam tshuam ntawm lub teeb los ntawm sab sauv thiab sab qis ntawm cov xab npum lossis cov tshuaj ntxuav tes yog tshwm sim. Vim li cas cov xim cuam tshuam pom tseeb rau cov yeeb yaj kiab nyias dua li cov yeeb yaj kiab tuab? Vim yog kev cuam tshuam yoj, zaj duab xis ntawm cov roj ntawm dej hauv lub hnub ci pom tau tias daj rau cov neeg soj ntsuam ncaj qha saum lub dav hlau
Cov dyes nyob qhov twg?
Feem ntau cov xim ntuj yog los ntawm cov nroj tsuag dye, qhov zoo tshaj plaws-paub sawv daws yog woad, weld thiab madder los ntawm cov teb chaws Europe, thiab brazilwood, logwood thiab indigo los ntawm tropics. Ib txhia, xws li cochineal, los ntawm kab thiab ib tug me me, nrog rau cov hlau thiab tooj liab ntsev, los ntawm cov pob zeb hauv av
Cov xim dab tsi yog cov hlwb feem ntau ua ntej siv thawj cov xim rau cov txheej txheem Gram stain?
Ua ntej, siv lead ua violet, thawj stain, yog siv rau lub tshav kub-tso smear, muab tag nrho cov hlwb xim liab
Yuav ua li cas yog qhov tshwm sim uas ib tug poj niam dig muag xim uas yuav ib tug txiv neej uas tsis pom kev zoo yuav muaj xim dig muag me nyuam?
Yog tias tus poj niam uas muaj lub zeem muag zoo li no (heterozygous rau qhov muag tsis pom xim) yuav ib tug txiv neej ib txwm muaj (XY), cov xeeb ceem hauv qab no tuaj yeem xav tau hauv F2 tiam: ntawm cov ntxhais, 50% yog ib txwm muaj thiab 50% yog cov neeg nqa khoom rau cov kab mob; ntawm cov tub, 50% yog xim dig muag thiab 50% yog qhov pom kev zoo
Dab tsi xim kuv yuav tsum pleev xim rau kuv cov pob txha ntoo ntoo?
Ua kom sov Tones Qhov zoo tshaj plaws sov xim palettes rau knotty ntoo thuv siv tones ntawm daj ochre, burnt txiv kab ntxwv los yog cib liab. Cov tones sov tuaj yeem tinted nrog dawb thaum chav tsev xav tau cov xim sib dua. Cov xim no txuas lub ntuj sov ntawm cov ntoo tones, ntxiv kev nplua nuj thiab kev muaj sia nyob rau qhov chaw