2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
Lub sijhawm embryonic, thaum lub sijhawm organogenesis tshwm sim, tshwm sim nruab nrab implantation ntawm ib ncig ntawm 14 hnub mus rau ib ncig ntawm 60 hnub postconception. Qhov no feem ntau yog lub sijhawm rhiab tshaj plaws rau teratogenesis thaum raug tus neeg sawv cev teratogenic muaj qhov ua tau zoo tshaj plaws ntawm kev tsim cov malformation.
Nyob rau theem twg yog qhov tsim embryo tshaj plaws rau teratogens?
Thaum tus menyuam loj hlob tuaj, muaj qee yam kabmob ua rau qee lub sijhawm. Yog tias teratogen muaj peev xwm cuam tshuam nrog kev kaw lub raj neural, piv txwv li, qhov raug rau teratogen yuav tsum tshwm sim hauv thawj 3.5 txog 4.5 lub lis piam ntawm cev xeeb tub, vim qhov no yog thaum lub neural tube kaw.
Lub sijhawm cev xeeb tub yog cov tshuaj teratogens txaus ntshai tshaj plaws?
Lub Sijhawm nthuav tawm: Teratogens muaj teeb meem tshaj plaws thaum cev xeeb tub, pib kwv yees li 10 mus rau 14 hnub tom qab xeeb tub mus txog 8 lub lis piam mus rau cev xeeb tub.
theem twg ntawm kev loj hlob feem ntau yuav raug kev txom nyem tshaj plaws los ntawm teratogens?
Lub embryo yog qhov muaj feem cuam tshuam rau cov neeg ua haujlwm teratogenic thaum lub sijhawm sijhawm sib txawv sai. Cov theem ntawm kev loj hlob ntawm lub embryo txiav txim siab suscep- tibility rau teratogens. Lub sijhawm tseem ceeb tshaj plaws hauv kev loj hlob ntawm lub embryo lossis hauv kev loj hlob ntawm ib lub cev tshwj xeeb yog lub sijhawm sib faib cell ceev.
yog dab tsi4 cov tshuaj teratogens?
Teratogens tau muab faib ua plaub hom: cov neeg ua haujlwm lub cev, cov kab mob metabolic, kis kab mob, thiab thaum kawg, tshuaj thiab tshuaj.
Teratogens
Pom zoo:
Lub sijhawm twg yog lub sijhawm zoo tshaj plaws rau saib noog?
Lub Sijhawm Hnub Zoo tshaj plaws yog feem ntau thaum kaj ntug txog 11 teev sawv ntxov, thaum noog nquag nquag. Qhov no yog qhov tshwj xeeb tshaj yog thaum lub caij nplooj ntoos hlav thiab lub caij ntuj sov thaum ntxov, thaum cov noog hu nkauj thaum sawv ntxov.
Puas yog cov hnub qub uas ze tshaj plaws kuj yog cov hnub qub ci tshaj plaws?
Lub hnub qub nyob ze tshaj plaws rau lub ntiaj teb yog nyob rau hauv Alpha Centauri triple-star system, kwv yees li 4.37 lub xyoo teeb. … Sirius A yog lub hnub qub ci ntsa iab tshaj plaws hauv lub ntiaj teb hmo ntuj, vim nws qhov ci ntsa iab thiab nws nyob ze rau peb.
Ntawm koj qhov yooj yim lossis rau koj qhov yooj yim?
Yog hais txog qhov yooj yim mus ua ntej, ces txhua lub sijhawm tuaj yeem siv rau qhov tseem ceeb: Koj tuaj yeem hu rau kuv ntawm koj qhov yooj yim - txhua lub sijhawm, nruab hnub lossis hmo ntuj. Raws li rau tej zaum vs. tuaj yeem, tej zaum yuav yog lo lus raug siv ntau dua (tsawg kawg hauv kev nkag siab zoo dua), tab sis tuaj yeem ua suab zoo dua hauv cov ntsiab lus tsis raug.
Lub tsev pheeb suab twg yooj yim tshaj plaws?
Tswv yim yooj yim tshaj plaws los teeb Core 9 Tus Neeg Instant Cabin Tsev Pheebsuab (Zoo Tshaj Plaws Hauv Tsev) Teton Sports Instant 1/2 Tus Neeg Tsev Pheebsuab (Zoo Tshaj Rau Backpacking) Vango Dart Pop Up 3-Person Tsev Pheebsuab (Zoo Tshaj Plaws Rau Me Me) OT QOMOTOP Instant Cabin Tsev Pheebsuab 4/6/8/10 Tus Neeg (Zoo Tshaj Plaws Tsev Neeg Tsev Pheebsuab) Yuav ua li cas yog lub tsev pheeb suab zoo tshaj plaws?
Qhov twg ntawm cov tshuaj hauv qab no yog qhov yooj yim tshaj plaws cyclohexylamine?
Nyob rau hauv cov lus piav qhia, cov cyclohexylamine yog qhov yooj yim dua li lwm yam peb lub tebchaw xws li aniline, benzylamine thiab 1-piperideine raws li khub electron yooj yim muaj nyob rau ntawm nitrogen ntawm cyclohexylamine piv. mus rau lwm cov tebchaw.
