UltrasoundHe ʻano hawewe ʻenekini elastic i loko o ke ʻano mea.He ʻano nalu.No laila, hiki ke hoʻohana ʻia e ʻike i ka ʻike physiological a pathological o ke kino kanaka, ʻo ia hoʻi, diagnostic ultrasound.I ka manawa like, he ʻano ia o ka ikehu.Ke hoʻolaha ʻia kahi ʻano o ka ultrasound i loko o nā mea ola, ma o kā lākou launa pū ʻana, hiki ke hoʻololi i ka hana a me ke ʻano o nā mea ola, ʻo ia hoʻi, ka hopena o ka ultrasonic biological.

ʻO nā hopena o ka ultrasound ma nā pūnaewele ka nui o ka hopena wela, ka hopena cavitation a me ka hopena mechanical.ʻO ka hopena wela, ʻo ia ka wā e hoʻolaha ai ka ultrasound ma ke kikowaena, ke keʻakeʻa nei ka friction i ka haʻalulu molecular i hoʻokumu ʻia e ka ultrasound a hoʻohuli i kahi ʻāpana o ka ikehu i ka wela kiʻekiʻe kūloko (42-43 ℃).No ka mea he 45.7 ℃ ka wela make koʻikoʻi o ka ʻiʻo maʻamau, a ʻoi aku ka kiʻekiʻe o ka naʻau o ka pehu Liu ma mua o ka ʻiʻo maʻamau, ua hoʻopilikia ʻia ka metabolism o nā pūnae Liu pehu i kēia mahana, a ua pili ka synthesis o DNA, RNA a me ka protein. , Pela ka pepehi ana i na ma'i ma'i ma'i me ka pili ole i na kino ma'amau.

ʻO ka hopena Cavitation ma lalo o ka ultrasonic irradiation, ua hoʻokumu ʻia nā vacuoles i nā mea ola.Me ka vibration o nā vacuoles a me kā lākou pahū ikaika, hana ʻia ke kaomi ʻana i ka mīkini a me ka turbulence, ka mea e hoʻoheheʻe ʻia ai ka pehu Liu, ka wehe ʻana o ka ʻiʻo a me ka necrosis.

Eia kekahi, i ka wā e haki ai ka pahu cavitation, hoʻopuka koke ʻia ka wela kiʻekiʻe (e pili ana i 5000 ℃) a me ke kaomi kiʻekiʻe (a hiki i 500 ℃) × 104pa), hiki ke hana ʻia e ka thermal dissociation o ka wai mahu OH radical a me H atom, e OH radical a ʻO ka hopena redox i hana ʻia e ka H atom hiki ke alakaʻi i ka hoʻohaʻahaʻa polymer, inactivation enzyme, lipid peroxidation a me ka pepehi cell.

报错 笔记