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1. Lub ntsiab lus tseem ceeb ntawm HPMC Hypromellose, lub npe lus Askiv hydroxypropyl methylcellulose, alias HPMC. Nws cov mis molecular yog C8H15O8-(C10Hl8O6)n-C8Hl5O8, thiab qhov hnyav molecular yog li 86,000. Cov khoom no yog cov khoom siv semi-synthetic, uas yog ib feem ntawm pawg methyl thiab ib feem ntawm polyhydrox...Nyeem ntxiv»
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Hydroxypropyl methyl cellulose, luv luv li cellulose [HPMC], yog ua los ntawm cov paj rwb ntshiab heev ua cov khoom siv raw, thiab tau npaj los ntawm kev sib xyaw tshwj xeeb hauv qab cov xwm txheej alkaline. Tag nrho cov txheej txheem tau ua tiav hauv qab kev saib xyuas tsis siv neeg thiab tsis muaj cov khoom xyaw nquag xws li ...Nyeem ntxiv»
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1 Kev Taw Qhia Tuam Tshoj tau txhawb nqa cov tshuaj mortar sib xyaw ua ke tau ntau tshaj 20 xyoo. Tshwj xeeb tshaj yog nyob rau xyoo tas los no, cov chaw haujlwm ntawm tsoomfwv hauv tebchaws tau muab qhov tseem ceeb rau kev tsim cov tshuaj mortar sib xyaw ua ke thiab tau tshaj tawm cov cai txhawb nqa. Tam sim no, muaj ntau tshaj 10 lub xeev a...Nyeem ntxiv»