Puas yog lub hnub ci teeb uv teeb?

Cov txheej txheem:

Puas yog lub hnub ci teeb uv teeb?
Puas yog lub hnub ci teeb uv teeb?
Anonim

“ Hnub ci teeb tsis tso tawm hluav taws xob ultraviolet, yog li lawv ua rau muaj kev pheej hmoo tsawg rau tib neeg feem coob,”Dr. Cain hais. "Nco ntsoov nug koj tus kws kho mob yog tias koj noj tshuaj twg ua rau koj nkag siab ntau dua rau lub teeb."

Puas yog lub hnub ci tib yam li lub teeb UV?

Nws yog ib qho tseem ceeb uas yuav tsum nco ntsoov tias lub hnub ci teeb rau tanning thiab cov siv los kho cov tawv nqaij tsis zoo yog tsis zoo ib yamraws li cov siv rau SAD thiab lwm yam mob uas tau hais hauv kab lus no. Hnub ci teeb siv rau SAD lim tawm feem ntau lossis tag nrho ultraviolet (UV) lub teeb.

Koj puas tuaj yeem tau txais vitamin D los ntawm lub hnub ci?

Cov kws tshaj lij feem ntau tsis pom zoo siv lub hnub ci teeb los txhawb kev tsim cov vitamin D vim tias muaj kev pheej hmoo ntawm kev mob qog noj ntshav ntawm daim tawv nqaij. Koj lub cev tuaj yeem tsim cov vitamin D los ntawm kev raug UV - uas yog vim li cas ntau tus xa mus rau nws li "vitamin hnub ci."

YPuas UV lub hnub teeb tsis zoo rau tib neeg?

raug UV rays tuaj yeem ua rau kev laus ntxov ntawm daim tawv nqaij thiab cov cim qhia ntawm lub hnub puas xws li wrinkles, tawv nqaij tawv, daim siab pob, actinic keratosis, thiab hnub ci elastosis. UV rays kuj tuaj yeem ua teeb meem qhov muag. Lawv tuaj yeem ua rau lub pob txha (ntawm lub qhov muag pem hauv ntej) ua rau mob lossis kub hnyiab.

Lub hnub ci teeb ua haujlwm?

Results. Kev kho lub teeb tej zaum yuav tsis kho mob raws caij nyoog, kev nyuaj siab tsis raws caij nyoog lossis lwm yam mob. Tab sis nws tuaj yeem yooj yim cov tsos mob, nce koj lub zog, thiab pab koj zoo siab rau koj tus kheej thiab lub neej. Kev kho lub teebtuaj yeem pib txhim kho cov tsos mob hauv ob peb hnub xwb.

Pom zoo:

Nthuav cov khoom
Puas talcum hmoov yaj hauv dej?
Nyeem ntxiv

Puas talcum hmoov yaj hauv dej?

Talc yog xyaum insoluble hauv dej, dilute ntxhia acids, thiab dilute daws ntawm alkali halides thiab alkaline hydroxides. Nws yog soluble hauv kub concentrated phosphoric acid. Vim li cas talcum hmoov tsis yaj hauv dej? Tsim Hauv Tsev.

Vim li cas thiaj siv schlieren photography?
Nyeem ntxiv

Vim li cas thiaj siv schlieren photography?

Schlieren kev yees duab yog txheej txheem pom kev uas yog siv los yees duab cov dej ntws ntawm qhov sib txawv. Tsim los ntawm German physicist lub yim hli ntuj Toepler nyob rau hauv 1864 los kawm supersonic motion, nws yog dav siv nyob rau hauv aeronautical engineering los yees duab cov ntws ntawm huab cua nyob ib ncig ntawm cov khoom.

Yuav rov hais dua email li cas?
Nyeem ntxiv

Yuav rov hais dua email li cas?

Koj tuaj yeem sim: "Kuv tab tom ua raws li hauv qab no" lossis "Ua raws li qhov no [thov / nug / haujlwm]" "Kuv rov qab rau hauv qab no" lossis "Circling rov qab rau ntawm no [thov / nug / assignment]