Thaum dej nyob rau hauv lub raj kuaj nws muaj ib tug?

2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36

Lub meniscus yog qhov tshwm sim thaum koj muab cov kua tso rau hauv lub thawv. Thaum koj tso dej nyob rau hauv lub beaker los yog cev , koj pom ib tug nkhaus nto. Nrog rau cov kua dej feem ntau, lub zog txaus nyiam ntawm cov kua thiab lub thawv yog ntau dua qhov kev nyiam ntawm cov kua molecules ntawm tus kheej.

Ib yam li ntawd, koj tuaj yeem nug, dab tsi yog qhov ntsuas lub raj yas ua los ntawm?

Cov racks feem ntau yog ua ntawm cov hlau hlau, tab sis lawv tuaj yeem pom muaj xws li yas, polystyrene, ua npuas ncauj, fiberglass, thiab polypropylene. Test tube racks tuaj nyob rau hauv daim ntawv ntawm ib tug classic khib , ib daim ntawv interlocking lub voos xwmfab, ib daim ntawv stackable, cev ziab khib , nqa khib , thiab 1-zoo khib.

Ib yam li ntawd, meniscus ntawm dej yog dab tsi? Cov meniscus (plural: menisci , los ntawm Greek rau "Crescent") yog qhov nkhaus nyob rau saum npoo ntawm cov kua nyob ze rau saum npoo ntawm lub thawv lossis lwm yam khoom, tshwm sim los ntawm qhov nro. Nws tuaj yeem yog concave lossis convex, nyob ntawm cov kua thiab qhov chaw.

Ua li no, koj ntsuas cov kua hauv lub raj ntsuas li cas?

Ib yam cev muaj qhov sib npaug hauv qab, tab sis NMR cov raj thiab lwm yam cov hlab muaj lub tiaj hauv qab, yog li lub ntim ntim hauv lawv yog lub tog raj kheej. Koj tuaj yeem tau txais qhov tseeb tsim nyog ntsuas ntawm volume los ntawm ntsuas lub internal diameter ntawm lub cev thiab qhov siab ntawm ua kua.

Vim li cas cov kua hauv lub raj kuaj ua rau meniscus?

nto nro thiab nplaum quab yuam ua rau tsim ntawm a meniscus . qhov attraction yog muaj zog ntawm cov ua kua molecule thiab cev , cov ua kua yuav rub upward tiv thaiv lub ntiajteb txawj nqus qhov no yuav mus ntxiv kom txog rau thaum qhov chaw saum npoo thiab qhov hnyav yog sib npaug.