2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
Lawv tau piav qhia thawj zaug txog li 3000 BC hauv phau ntawv Egyptian qub. Tau ntau pua xyoo lawv tau tsim los ntawm cov khoom siv cog xws li hemp, lossis paj rwb lossis cov khoom siv tsiaj xws li cov leeg, txhob lo lo ntxhuav, thiab cov hlab ntsha. Cov khoom ntawm kev xaiv rau ntau centuries yog catgut, ib tug zoo xov woven los ntawm yaj cov hnyuv.
Catgut tuaj qhov twg?
Catgut, tawv qaum ua los ntawm cov hnyuv ntawm qee yam tsiaj, tshwj xeeb yog yaj, thiab siv rau kev phais ligatures thiab sutures, rau cov hlua ntawm violins thiab lwm yam twj paj nruag, thiab rau cov cov hlua ntaus pob tesniv thiab archery hneev taw.
Leej twg invented the first catgut?
Nws lub npe tiag tiag yog Abu al-Qasim Khalaf Ibn Al-Abbas Al-Zahrawi thiab nws tseem hu ua Albucasis (1, 2). Nws tau txais kev kawm hauv Córdoba University uas yog nplua nuj hauv kev tshawb fawb thiab kab lis kev cai. Nyob ntawd, Zahrawi tau tsim txoj hauv kev tshiab thaum ua kev phais thiab nrhiav pom cov cuab yeej kho mob.
Vim li cas catgut txwv nyob hauv Europe?
Catgut raug txwv hauv Tebchaws Europe thiab Nyij Pooj vim kev txhawj xeeb txog bovine spongiform encephalopathy (BSE), txawm tias cov tsiaj txhu los ntawm cov plab hnyuv tau sau tau ntawv pov thawj BSE-dawb. Catgut feem ntau tau hloov los ntawm hluavtaws absorbable polymers xws li polyglactin, polyglytone thiab poliglecaprone.
Leej twg ua catgut?
Catgut tsis yog tshwj xeeb rau cov hlua nkauj. Xyoo 1875, Pierre Babolat, leej twg them nws cov nqi ua catgut hlua rauinstrumentalists, tau txais kev mus ntsib los ntawm W alter Clopton Wingfield, ib tug inventor thiab pab tub rog loj nyob rau hauv cov tub rog British.
Pom zoo:
Thaum twg catgut tau tsim?
Lawv tau piav qhia thawj zaug li far back 3000 BC nyob rau hauv ancient Egyptian cov ntaub ntawv. Tau ntau pua xyoo lawv tau tsim los ntawm cov khoom siv cog xws li hemp, lossis paj rwb lossis cov khoom siv tsiaj xws li cov leeg, txhob lo lo ntxhuav, thiab cov hlab ntsha.
Kev tsis ncaj ncees nyob qhov twg yog qhov hem rau kev ncaj ncees nyob txhua qhov chaw?
Martin Luther King tau hais tias: “Kev tsis ncaj ncees nyob txhua qhov chaw yog kev hem thawj rau kev ncaj ncees nyob txhua qhov chaw. Peb raug ntes nyob rau hauv ib tug inescapable network ntawm kev sib nrig sib pab, khi nyob rau hauv ib lub tsoos tsho ntawm txoj hmoo.
Qhov twg yog qhov tsis txaus ntseeg nyob qhov twg?
Yuav muaj ob lub cev tsis zoo nyob rau hauv lub midbrain. Lawv yog symmetrically positioned, ib tug nyob rau ntawm ob sab ntawm lub midline ntawm lub hlwb, thiab lawv tsim ob lub pob nyob rau hauv lub posterior nto ntawm lub paj hlwb nyob rau hauv qab ntawm lub superior colliculi.
Qhov twg tag nrho cov nqi hluav taws xob nyob ntawm qhov kev siv nyiaj siab tshaj plaws yog qhov twg?
marginal utility is zero. Tag nrho cov nqi hluav taws xob yog siab tshaj thaum marginal utility yog xoom. Qhov no yog vim muaj ntau txoj cai ntawm kev txo qis marginal utility uas hais tias tus neeg siv khoom noj ntau thiab ntau qhov zoo, qhov ntxiv rau tag nrho cov nqi hluav taws xob poob.
Qhov twg yog qhov tsim qauv tsim?
Hauv software engineering, tsim qauv tsim yog qauv tsim uas cuam tshuam nrog cov khoom tsim cov txheej txheem, sim tsim cov khoom kom haum rau qhov xwm txheej. … Cov qauv tsim tsim yog tsim los ntawm ob lub tswv yim tseem ceeb. Ib qho yog encapsulating kev paub txog qhov twg cov chav kawm ua vaj tse siv.
