2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
tshuaj ntoo pulping koom nrog kev rho tawm ntawm cellulose los ntawm ntoo los ntawm dissolving lignin uas khi cov cellulose fibers ua ke. Cov txheej txheem 4 feem ntau siv hauv tshuaj pulping yog kraft, sulfite, nruab nrab sulfite semichemical (NSSC), thiab dej qab zib.
txhais tau li cas los ntawm chemical pulp?
Tshuaj pulping yog hais txog cov txheej txheem sib txawv los ntawm cov ntoo lossis lwm cov khoom noj fiber ntau tau hloov mus rau hauv cov khoom lag luam nrog cov fibers liberated los ntawm kev yaj cov lignin uas khi cov cellulose fibers ua ke. Los ntawm: Muaj Biorefineries & Dawb Biotechnology, 2015.
Dab tsi yog qhov sib txawv ntawm cov txheej txheem tshuab thiab tshuaj lom neeg pulping?
Mechanical pulping siv feem ntau txhua yam zog los cais cov fibers thiab tsim cov khoom siv pulp. Cov tshuaj pulping siv cov tshuaj siv zog feem ntau, (los ntawm cov tshuaj tiv thaiv), cais cov fibers thiab tsim cov khoom siv pulp.
Dab tsi yog tshuaj lom neeg pulping?
Txoj kev hloov cov ntoo chips rau daim ntawv pulp rau papermaking siv kev sib xyaw ntawm cov tshuaj thiab cov tshuab txhais tau tias. Pulp yields hauv cov txheej txheem semichemical feem ntau yog los ntawm 60: 80% ntawm cov ntoo qub, thiab feem ntau ntawm cov seem lignin tseem nyob. …
Cov txheej txheem tshuaj ntawm ntawv yog dab tsi?
Cov neeg ua ntawv yuav tsum tshem cov lignin ntawm cov ntoo. Yuav kom ua tiav qhov no, ib qho ntawm cov tshuaj tiv thaiv tseem ceeb siv hauv kev lag luam yog Kraft txheej txheem, hauvuas cov ntoo chips tau ua ke nrog kev sib xyaw ntawm sodium hydroxide thiab sodium sulfide hauv dej ntawm qhov kub thiab txias.
Pom zoo:
Puas yog cov dab dab dab dab dab dab dab dab dab dab dab dab?
Myth: Ib tug dab tshos tsis yog neeg ncaj ncees yog tiasnws haum yog. Fact: Tu siab, qhov no yog ib lo lus tsis tseeb uas tau raug perpetuated los ntawm aversive trainers. Txawm hais tias haum rau lub caj dab kom zoo khawb rau hauv cov tawv nqaij rhiab nyob ib ncig ntawm lub caj dab, uas ua rau muaj kev puas tsuaj loj rau cov thyroid, esophagus, thiab trachea.
Dab tsi yog 10 vaj huam sib luag tshuaj tshuaj?
Kev kuaj tshuaj 10-panel nrhiav cov kab ntawm kaum hom tshuaj sib txawv uas feem ntau cuam tshuam nrog kev siv yeeb tshuaj. Qhov kev sim no ib txwm ua nrog cov qauv tso zis thiab tej zaum yuav muaj kev sim thib ob kom paub meej tias cov txiaj ntsig zoo.
Cov piv txwv ntawm cov kuab tshuaj thiab cov kuab tshuaj yog dab tsi?
Solutes yog cov khoom uas yaj rau hauv cov kuab tshuaj thiab peb xaus nrog kev daws. Qee qhov piv txwv ntawm cov kuab tshuaj yog dej, ethanol, toluene, chloroform, acetone, mis nyuj, thiab lwm yam. Piv txwv ntawm cov kuab tshuaj muaj xws li, qab zib, ntsev, oxygen, thiab lwm yam … Cov dej dej muaj dej (kua kua) thiab yaj oxygen (solute).
Puas yog cov dab dab dab dab dab dab tau them?
OHL cov neeg ua si tsis tau nyiaj hli, vim lawv tsis raug lees paub tias yog cov neeg ua haujlwm raws li Txoj Cai Kev Ua Haujlwm. Txawm li cas los xij, lawv suav nrog cov txiaj ntsig xws li nyiaj rov qab txhua xyoo, tag nrho cov nqi kawm ntawv them, thiab daim pib pub dawb.
Cov tshuaj twg yog cov tshuaj uas tsis yog tshuaj tiv thaiv inflammatory analgesic?
Txhua yam koj yuav tsum paub txog NSAIDs. Nonsteroidal anti-inflammatory tshuaj (NSAIDs) yog cov tshuaj uas txo qis lossis txo qhov mob. Cov piv txwv nrov tshaj plaws ntawm cov tshuaj hauv pawg no yog aspirin thiab ibuprofen. NSAIDs tuaj nyob rau hauv lub ntsiab lus dav ntawm non-opioid analgesics.
