Cov txheej txheem:
Video: Cov tshuaj tua kab puas yog txhua yam tshuaj hluavtaws?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Tsis tas li ntawd xwb, tab sis muaj ntau yam pov thawj tias ntuj tshuaj tua kab tso cai rau hauv kev ua liaj ua teb organic tsuas yog muaj tshuaj lom tshuaj tua kab hluavtaws . Synthetic tshuaj muaj tshuaj lom ntau tshaj li ntuj tshuaj . 2. Organic zus zaub mov zoo dua rau koj vim nws yog tag nrho ntuj.
Tsis tas li ntawd, cov tshuaj tua kab hluavtaws yog dab tsi?
Synthetic Insecticides . Tshuaj tua kab yog cov khoom tsim los tua tej yam kab mob. Ib tshuaj tua kab yog a tshuaj tua kab formulated los tua kab. Tshuaj tshuaj tua kab , ob qho tib si "organic" (ntawm natural origin) thiab man-made los yog hluavtaws cov khoom txuas ntxiv yog txoj hauv kev tseem ceeb ntawm kev tawm tsam cov kab tsuag ntawm cov nroj tsuag ornamental.
Kuj Paub, vim li cas cov tshuaj hluavtaws ua rau muaj kev phom sij? Tag nrho tshuaj (natural thiab dag ) yog phom sij yog tias qhov raug siab txaus. Txawm tias cov dej ntau dhau ntawm lub sijhawm luv luv tuaj yeem dilute cov ntsev hauv cov ntshav thiab ua rau lub hlwb o.
Ib yam li ntawd, tib neeg nug, muaj pes tsawg cov tshuaj hluavtaws muaj?
Nyob ntawd niaj hnub no ntau tshaj 30,000 hluavtaws chemicals hauv siv.
Dab tsi yog peb cov khoom siv dag zog?
Artificial chemicals:
- PVC, polyvinil chloride (ib qho yas siv hauv cov khoom ua si thiab hoses, thiab lwm yam)
- PE, polyethilene (ib lub hnab yas siv hauv ntim, thiab lwm yam)
- Baquelite (ib qho yas siv hauv lub lauj kaub, thiab lwm yam)
Pom zoo:
Cov tshuaj tua kab mob twg thaiv cov kab mob protein ntau?
Tetracyclins yog ib hom tshuaj tua kab mob uas suav nrog cov thawj tetracycline nrog rau doxycycline thiab minocycline. Cov tshuaj tua kab mob no khi rau A qhov chaw ntawm 30s ribosome, tiv thaiv tRNA los ntawm kev nqa cov amino acids tshiab. Yog tias tRNA tsis tuaj yeem txuas mus rau ribosome, ces tsis muaj cov proteins tshiab tuaj yeem ua tau
Txoj kev faib cov ntaub ntawv twg muab cov ntaub ntawv sib npaug ntawm cov ntaub ntawv lossis cov kev tshuaj xyuas hauv txhua chav kawm cov ntaub ntawv?
Quantile. txhua chav kawm muaj cov yam ntxwv sib npaug. Ib qho kev faib tawm ntau yog zoo haum rau cov ntaub ntawv faib tawm. Quantile muab tib tus lej ntawm cov ntaub ntawv muaj nuj nqis rau txhua chav kawm
Cov khoom twg yog cov piv txwv ntawm cov khoom siv tshuaj xyuas txhua yam uas siv?
Piv txwv ntawm cov khoom siv tshuaj muaj xws li flammability, toxicity, acidity, reactivity (ntau hom), thiab kub ntawm combustion. Hlau, piv txwv li, ua ke nrog oxygen nyob rau hauv lub xub ntiag ntawm dej los ua xeb; chromium tsis oxidize (Daim duab 2)
Vim li cas thiaj siv cov tshuaj tua kab mob hauv cov tshuaj distillation?
Lub hom phiaj ntawm kev sib tsoo granules Saib Lawv nres, uas qhov tshwm sim tam sim ntawd ntawm vapor npuas nyob rau hauv cov kua kub ua rau upwards splashing. Theanti-bumping granules ua raws li lub hom phiaj rau theformation ntawm vapor cia du boiling
Dab tsi yog cov tshuaj tua kab mob cuam tshuam nrog cov protein synthesis?
Erythromycin, macrolide, khi rau 23S rRNA tivthaiv ntawm 50S ribosome thiab cuam tshuam nrog kev sib dhos ntawm 50S subunits. Erythromycin, roxithromycin, thiab clarithromycin tag nrho tiv thaiv elongation ntawm cov kauj ruam transpeptidation ntawm synthesis los ntawm thaiv cov 50S polypeptide export qhov