2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
Nqe Lus Nug: Rau cov arthropods hauv av qhov zoo ntawm chitinous exoskeleton yog nws tiv thaiv tsiaj los ntawm lub cev qhuav dej.
Qhov zoo ntawm Chitinous skeleton hauv Arthropoda yog dab tsi?
Qhov zoo ntawm exoskeleton: 1) lawv cia txoj kev txav mus los vim kev sib koom ua ke. 2) lawv muab kev tiv thaiv lub cev puas tsuaj thiab puas.
Dab tsi yog Chitinous exoskeleton hauv arthropods?
Arthropods yog npog nrog tawv, resilient integument lossis exoskeleton ntawm chitin. Feem ntau cov exoskeleton yuav muaj cov tuab tuab uas cov chitin tau ntxiv dag zog los yog khov kho los ntawm cov khoom xws li cov zaub mov lossis cov proteins uas tawv. Qhov no tshwm sim nyob rau hauv qhov chaw ntawm lub cev uas yuav tsum tau rau rigidity los yog elasticity.
Pob arthropods muaj chitinous exoskeleton?
Nyob rau hauv arthropods, chitin yog siv ua ke nrog ntau yam proteins los tsim cov exoskeletonuas lawv txhua tus muaj nyob hauv ib qho. Lub Arthropoda yog ib pab pawg qub ntawm cov kab mob thiab tshwm sim txog 550 lab xyoo dhau los thaum ntxov ntawm cov ntaub ntawv pob txha.
Yuav ua li cas hauv qab no yog qhov zoo ntawm kev muaj exoskeleton?
Muaj ib qho nyuaj rau sab nraud nyob rau hauv daim ntawv ntawm exoskeleton yog ib tug zoo tiv thaiv tawm tsam predators; nws pab txhawb lub cev thiab nws zoo li hnav ib lub tsho tiv thaiv dej nag uasua kom tus tsiaj tsis txhob ntub los yog ziab tawm. Nws kuj tiv thaiv tsiaj cov mos mos, sab hauv nruab nrog cev thiab cov leeg ntawm kev raug mob.
Pom zoo:
Ib qho ntawm cov hauv qab no yog cov piv txwv ntawm cov lus pom zoo rau huab cua?
Cov kws tshawb fawb tau paub txog ntau qhov kev tawm tswv yim zoo hauv kev nyab xeeb. Ib qho piv txwv yog melting ice. Vim tias cov dej khov muaj lub teeb-xim thiab muaj kev cuam tshuam, feem ntau ntawm cov hnub ci uas tsoo nws tau rov qab mus rau qhov chaw, uas txwv qhov kub ntawm qhov nws ua rau.
Yuav ua li cas txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau pom kev pom?
Txawm li cas los xij, corneal collagen cross-linking - cov txheej txheem qib siab tau pom zoo los ntawm US Food and Drug Administration (FDA) hauv xyoo 2016 - tuaj yeem txhim kho qhov pom kev hauv cov neeg mob txhua hnub nyoog. Corneal collagen cross-linking (CXL) tsis yog kho rau keratoconus, tab sis nws tuaj yeem pab tiv thaiv tus mob kom tsis txhob mob hnyav.
Dab tsi yog cov reactants thiab cov khoom ntawm cov tshuaj tiv thaiv rau pem hauv ntej (sab laug-rau-txoj cai)?
Dab tsi yog cov reactants thiab cov khoom ntawm cov tshuaj tiv thaiv rau pem hauv ntej (sab laug-rau-txoj cai)?Glucose thiab Fructose yog cov reactants. Sucrose thiab Dej yog cov khoom. Puas yog cov tshuaj tiv thaiv tom ntej yog cov tshuaj tiv thaiv condensation lossis cov tshuaj tiv thaiv hydrolysis?
Qhov twg yog qhov kev sib raug zoo ntawm stereochemical ntawm ob khub ntawm cov molecules?
Enantiomers thiab diastereomers tsuas yog ob qho kev sib raug zoo stereochemical uas koj tuaj yeem muaj ntawm ob lub molecules. Cov stereoisomers yog ob lub molecules uas ua tiav ob qhov kev xav tau hauv qab no: Ob lub molecules yuav tsum muaj tib lub qauv molecular, thiab.
Rau kev nyeem tau zoo dua nws yog qhov zoo dua tias cov ntsiab lus mos txwv yog?
Kua koj cov ntsiab lus mos txwv symmetrical Yog ua tau Lub ntsiab lus, ib kab ib, ob kab ib, thiab lwm yam. Nws yooj yim dua ntawm lub qhov muag thiab yog li yooj yim ntawm tus nyeem. Thaum twg koj yuav tsum siv cov ntsiab lus mos txwv?
