Video: Dab tsi yuav tshwm sim nyob rau hauv UV teeb?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
UV teeb yog siv rau tshawb xyuas qhov muaj cov pov thawj pov thawj hauv kev tshawb nrhiav forensic. Ntshav, zis, phev thiab qaub ncaug ua tau tam sim no pom fluorescence. UV los yog lub teeb dub qhia kev hloov ntawm qhov saum npoo ntawm cov khoom vim nws ua rau cov fluorescence tshwj xeeb hauv cov khoom nyob ntawm ntawm muaj pes tsawg leeg thiab hnub nyoog.
Kuj nug, dab tsi tshwm sim hauv qab lub teeb UV?
Lub cev Fluids Fluoresce Hauv qab Dub Teeb Ntau cov kua hauv lub cev muaj cov fluorescent molecules. Cov kws tshawb fawb forensic siv ultraviolet teeb ntawm qhov chaw ua txhaum cai nrhiav ntshav, zis, lossis phev.
Ib tug kuj nug, dab tsi glow txiv kab ntxwv nyob rau hauv UV teeb? Cov tshuaj xws li cov kab mob, cov zis, cov kua dej thiab cov ntshav tau kuaj pom los ntawm cov xim dub teeb kev tshuaj xyuas. Flavin (pom nyob rau hauv Vitamin B) kuj yog ib yam khoom uas emits ib fluorescent ci ntsa iab thaum raug UV teeb . Cov kws tshawb fawb tau tshawb pom tias cov kab mob zoo li sib sau ua ke ntawm qhov chaw uas muaj cov flavin ntau.
Tsis tas li ntawd, cov tshuaj dab tsi tshwm sim hauv qab lub teeb dub?
Cov vitamins, kua thiab Chlorophyll Vitamins A thiab B, niacin, riboflavin thiab thiamine tag nrho ci nyob rau hauv lub teeb dub. Ntshav, phev thiab cov zis muaj florescent molecules, uas ua rau lawv pom nyob rau hauv lub teeb dub. Sib tsoo cov nroj tsuag rau hauv hom tshuaj chlorophyll ua rau lawv ci ntsa iab liab hauv qab lub teeb dub.
Puas yog poj niam tso tawm hauv qab lub teeb dub?
Cov lus teb yog yog, thiab tsis yog. Poj niam tso zis tsis kaj li nyob rau hauv ib lub teeb dub raws li tuaj. Vim hais tias ntawm cov tshuaj muaj pes tsawg leeg txiv neej lub cev kev sib deev kua dej yog qhov kaj. Raws li rau poj niam cov kua, hmoov tsis, peb tsuas hais tau tias nws yuav tsis mus ci ntsa iab zoo li ci.
Pom zoo:
Yuav ua li cas tshwm sim rau tam sim no nyob rau hauv ib tug parallel circuits thaum ntxiv qhov muag teev?
Raws li ntau qhov muag tau ntxiv, qhov tam sim no nce. Raws li ntau resistors ntxiv nyob rau hauv parallel, tag nrho tam sim no lub zog nce. Yog li ntawd, tag nrho cov tsis kam ntawm Circuit Court yuav tsum tau txo. Qhov tam sim no nyob rau hauv txhua lub teeb yog tib yam vim hais tias tag nrho cov qhov muag teev glowed nrog tib brightness
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