quercitron oak - nruab nrab mus rau loj deciduous ntoo ntoontawm lub tebchaws United States sab hnub tuaj thiab sab qab teb sab hnub tuaj Canada muaj cov tawv tawv tsaus nti thiab cov tawv daj sab hauv siv rau tanning; dav tsib-lobed nplooj yog bristle-tipped.
Dab tsi yog quercitron?
Ib zaub daj xim muab rho tawm los ntawm cov tawv dub lossis xim av xim avntawm cov ntoo qhib dub, Quercus velutina (yav tas los Quercus nigra), uas yog nyob rau sab hnub tuaj thiab sab hnub poob ntawm Tebchaws Meskas. Quercitron tau qhia hauv tebchaws Askiv hauv xyoo 1775 los ntawm Edward Bancroft ua qhov hloov pauv rau weld.
quercitron zoo li cas?
tsob ntoo cov tawv dub sab nraud yog ridged nyob rau hauv qhov tsis sib xws; lub txiv kab ntxwv-daj puab tawvyog qhov chaw ntawm tannin thiab quercitron, xim daj. Cov nplooj buds yog sharply taw thiab npog nrog down.
Dab tsi yog xim tsawg tshaj plaws?
Vantablack yog lub npe hu ua tus txiv neej darkest ua pigment. Cov xim, uas absorbs yuav luag 100 feem pua ntawm cov teeb pom kev, tau tsim los ntawm Surrey Nanosystems rau qhov chaw tshawb nrhiav. Cov txheej txheem tsim khoom tshwj xeeb thiab tsis muaj vantablack rau cov pej xeem sawv daws ua rau nws muaj xim tsawg tshaj plaws.
brazilwood dye siv rau dab tsi?
Brazilwood dye tau siv rau textile dyes, inks, xim, kua roj vanish, thiab ntoo stains. Cov xim tsis yooj yim thiab ploj mus thaum cua sov.
