Cov txheej txheem:
Video: Vim li cas nws nyuaj rau taug qab cov fiber ntau rau ib qho twg?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Vim tias textiles yog loj-ua, nws yog nyuaj taug qab fiber ntau rov qab mus rau qhov tshwj xeeb qhov chaw , mas fiber ntau pov thawj muaj txiaj ntsig vim nws tsim kev sib txuas ntawm cov neeg raug tsim txom, cov neeg raug liam, thiab qhov chaw. Tseem nug fibers (cov neeg pom hauv cheeb tsam lossis ntawm tus neeg) tuaj yeem txuas nrog tus neeg raug liam.
Ib yam li ntawd, fiber ntau puas tuaj yeem ua tus kheej?
Ua tau a fiber ntau yog tus kheej mus rau ib qho textile ntaub? Yog, tus qauv ua tau ua tus kheej thaum ib daim ntaub torn ntawm ib lub tsoos tsho ua tau yuav tsum matched ncaj qha rau lub kua muag qauv, zoo li ib daim ntawm ib tug jigsaw puzzle.
Tsis tas li ntawd, cov kws tshawb fawb forensic yuav txiav txim siab li cas yog tias cov plaub hau yog cov plaub hau lossis tsis? Cov plaub hau - Cov kws tshuaj ntsuam tau qhia cov neeg tshawb nrhiav yog tus kheej cov plaub hau yog tib neeg los yog tsiaj, thiab nyob rau hauv cov ntaub ntawv ntawm tib neeg plaub hau , qhov twg ntawm lub cev tus qauv originated. Cov plaub hau cov qauv yog feem ntau sau nrog tweezers. Fiber ntau - Fibers yog threadlike hais los ntawm ntaub los yog lwm yam ntaub ntawv xws li ntaub pua plag.
Tsis tas li lo lus nug yog, nyob rau hauv hom pov thawj dab tsi tuaj yeem nrhiav pom tau?
Cov piv txwv ntawm cov ntaub ntawv pov thawj yog textile fibers, ignitable kua residue uas muaj peev xwm siv raws li accelerants nyob rau hauv arson rooj, phom residue, nto txheej (los yog xim), iav, tshuaj pleev ib ce, tib neeg thiab tsiaj plaub hau, av thiab cov ntxhia , tapes, teeb filaments, explosives, ntoo chips, botanical tshuaj xws li paj ntoos, thiab
Dab tsi yog tsib hom kev pov thawj loj?
Cov ntaub ntawv pov thawj uas feem ntau sau los ntawm kev ua txhaum cai muaj xws li:
- Cov plaub hau.
- Fibers.
- iav.
- Cov khoom cog.
- Xim chips los yog hloov.
- Av.
- Cov ntiv tes.
Pom zoo:
Vim li cas nws nyuaj rau txheeb xyuas cov hlau ions los ntawm Xim ntawm nplaim taws?
Lub zog no raug tso tawm raws li lub teeb, nrog cov yam ntxwv nplaim xim ntawm cov hlau ions sib txawv vim qhov sib txawv ntawm cov hluav taws xob hloov pauv. Raws li tau hais, cov kev sim no ua haujlwm zoo dua rau qee cov hlau ions dua li lwm yam; tshwj xeeb, cov ions pom nyob rau hauv kab hauv qab ntawm cov infographic feem ntau yog faus thiab nyuaj rau qhov txawv
Vim li cas nws nyuaj rau pov tseg cov pov tseg nuclear?
Nuclear pov tseg yog ib qho nyuaj tshaj plaws ntawm cov pov tseg rau kev tswj hwm vim tias nws muaj kev phom sij heev. Vim nws cov xov tooj cua thiab cov khoom muaj kev phom sij heev, cov khib nyiab nuclear yuav tsum tau ua tib zoo khaws cia lossis rov ua dua
Dab tsi yog DNA zoo li cuam tshuam nws cov qauv tshuaj rau nws zoo li cas thaum muaj ntau ntawm nws yog clumped ua ke?
Hais txog nws cov qauv tshuaj rau nws zoo li cas thaum ntau nws yog clumped ua ke. DNA zoo li kab laug sab webs. DNA tau soluble hauv DNA extraction tsis yog li peb tsis pom nws. Thaum nws tau stirred rau hauv ethanol, nws clumped ua ke thiab tsim thicker thiab thicker strands loj txaus kom pom
Vim li cas nws nyuaj rau taug qab cov tshuaj biochemical hauv hlwb?
Enzymes thiab Biochemical Reactions. Feem ntau cov tshuaj tiv thaiv kab mob hauv cov kab mob yuav ua tsis tau raws li cov xwm txheej hauv cell. Piv txwv li, lub cev kub ntawm cov kab mob feem ntau tsawg dhau rau cov kev cuam tshuam tshwm sim sai txaus los ua cov txheej txheem hauv lub neej. Hauv cov kab mob, catalysts hu ua enzymes
Qhov twg ntawm cov ntsiab lus hauv qab no feem ntau pom nyob rau hauv feem ntau cov chiv?
Cov tshuaj chiv niaj hnub suav nrog ib lossis ntau tshaj ntawm peb lub ntsiab lus tseem ceeb tshaj plaws hauv cov zaub mov noj: nitrogen, phosphorus, thiab potassium. Qhov tseem ceeb thib ob yog cov ntsiab lus sulfur, magnesium, thiab calcium