Gutta-percha - nws .. ntsiab lus ntawm lo lus "gutta-percha"

A khoom xws li gutta percha hais txog ib tug ntau yam ntawm ib qho nyuaj ntuj latex tau los ntawm cov kua ntoo ntoo zoo Palaquium, Isonandra thiab Dichopsis. Lo lus nws tus kheej los ntawm lub npe ntawm cov nroj tsuag nyob rau hauv lub Malay lus - "geyha-Persian", uas translates li 'latex cov hnab looj tes. " Gutta-percha - yog dab tsi? Qhov no chaw yog siv ob qho tib si cia thiab nab tus xeeb ntxwv.

Los ntawm ib tug scientific point of view

Yuav ua li cas yog lub ntsiab lus ntawm lo lus "gutta-percha"? Los ntawm ib tug scientific point of view, cov khoom no twb txwv kom muab zais nyob rau hauv 1843 thiab xa mus rau qhov tseem ceeb xwm thermoplastics. Nyob rau hauv lub thib ob ib nrab ntawm cov XIX xyoo pua, gutta-percha siv rau ntau yam ntawm domestic thiab muaj lub hom phiaj.

Nyob rau hauv kev, qhov no cov ntaub ntawv uas tau yeej yuav tsum tau raws li ib tug insulating cov ntaub ntawv uas rau underwater hlua taws xob cables. Ntev ua ntej lub gutta-percha twb qhia nyob rau hauv lub Western lub ntiaj teb no, nws twb siv nyob rau hauv ib tug tsawg ua daim ntawv ntawm cov Malaysian Archipelago natives ua leeg rau riam, taug kev nrog thiab lwm yam hom phiaj.

Tus thawj European mus nrhiav tau cov khoom siv no yog John John hais tias nws pom nyob rau hauv lub Far East nyob rau hauv 1656. Nws hu ua nws "tom hav zoov Mather." Dr. William Montgomery, ib tug kev kho mob ceev xwm ntawm lub Indian kev pab cuam, nkag tau rau gutta-percha rau hauv kev siv tswv yim nyob rau hauv lub sab hnub poob. Nws xub pom tau hais tias lub peev xwm ntawm cov khoom no nyob rau hauv cov tshuaj, thiab nyob rau hauv 1843 nws twb muab tsub lub kub puav pheej ntawm lub noob nom noob tswv Society of Arts nyob rau hauv London.

gutta-percha tsob ntoo

Nyob rau hauv Malaysia, ib tsob ntoo npe hu ua "Taban", thiab cov neeg muaj txwm siv lub tawv kua txiv ( "khans") rau qhov siv thiab ua cov khoom xws li molded leeg rau cov cuab yeej thiab riam. Qhov no ntuj latex, kuj hu ua gutta-percha, yog ib tug zoo heev khoom.

Palaquium gutta ntoo loj hlob nyob rau hauv qhov siab 5-30 m thiab feem ntau ib lub cheeb ntawm 1.5 m. Evergreen yoojyim, interleaved los yog cov txheej txheem ntawm nyob rau hauv ib tug kauv, ib tug yooj yim, ib tug-piece, kwv yees li 8-25 cm txhua tus nyob rau ntev. Lawv yog cov glossy ntsuab saum toj no thiab feem ntau daj los yog glaucous hauv qab no.

Paj tshwm sim nyob rau hauv me me pawg raws stems, txhua lub paj muaj ib tug dawb Corolla nrog plaub-tsev neeg (feem ntau rau) uas ntse ntse tuaj. Cov txiv hmab txiv ntoo yog ib tug txiv hmab txiv ntoo ovoid 3-7 cm nyob rau hauv txoj kab uas hla, muaj los ntawm ib tug mus rau plaub noob. Nyob rau hauv ntau hom, nws yog siav.

Nyob rau hauv Australia, lub gutta percha - ib lub npe, qhia tshwj xeeb uas siv rau cov ntoo Excoecaria parvifolia, uas muab ib tug uas muaj ntxhiab, ib tug hnyav tsaus xim av ntoo. Nws tseem hu ua lub "sab qaum teb birch." Qhov no xyov hom yog tsis txuam nrog haiv neeg Palaquium.

Los ntawm cov tshuaj taw tes ntawm view

Gutta-percha ua li cas nws txhais li cas? Nyob rau hauv lub truest kev txiav txim zoo nws - ua los ntawm gutta-percha. Yuav ua li cas hom ntawm meteriall los ntawm ib tug tshuaj taw tes ntawm view? Nws qauv yog ib tug latex los yog elastomer polymer los ntawm isoprene los yog polyisoprene. Thaum latex rubbers yog amorphous nyob rau hauv molecular qauv, guttapercha (transstruktura) crystallized, uas ua rau yus mus rau ib tug stiffer taub hau. Gutta-percha - yog isoprene polymer uas yog mos thaum rhuab thiab tau yooj yim yuav puab ua ntau yam nrhiav uas yog precisely ncauj lus kom ntxaws.

Siv nyob rau hauv kev kho hniav

Cov tib bioinertsiya uas ua gutta percha haum rau marine cables, tseem haum rau kev kho mob hom phiaj, uas yog nyob rau hauv kev kho hniav. Qhov no cov ntaub ntawv uas yog siv nyob rau hauv ntau phais kiag li lawm thiab paus txoj kev kho (obturation los yog sau cov khoob qhov chaw hauv tus hniav hauv paus tom qab nws tau undergone endodontic txoj kev kho). Nws lub cev thiab tshuaj zog, nrog rau cov inertness thiab biocompatibility, melting point, ductility thiab malleability, ua rau nws ib qho tseem ceeb nyob rau hauv endodontics.

keeb kwm kev siv

Raws li biologically inert thiab ruaj khov, qhov no hom ntawm latex yog ib tug zoo hluav taws xob insulator nrog ib tug high school cov dielectric qhov. Tus ntoo uas muaj ntau yam hom kuj tseem ceeb heev. Western ntiaj teb no thaj chaw ntawm gutta-percha tau pom xwb nyob rau hauv xyoo 1842, txawm tias lub zos Malayan Aborigines siv nws rau centuries. Yog hais tias koj cia cov kua (kua txiv) qhuav thiab coagulate nyob rau hauv lub hnub, nws puv lub zog latex, uas muaj peev xwm rov qab yuav saj zawg zog yog hais tias nws yog rhuab, tab sis tsis nkig, tsis zoo li roj hmab, tau ua ntej mus rau lub foundations ntawm vulcanization.

Los ntawm 1845, lub UK ua lub hlua taws xob nyob ntawm tej, insulated nrog gutta-percha. Looj tau txais kev pab raws li ib tug insulating cov ntaub ntawv uas rau hauv thaum ntxov submarine hlua taws xob cables, nrog rau cov thawj transatlantic hlua taws xob cable. Gutta-percha yog tshwj xeeb yog tsim rau qhov no, vim nws tsis yog rov los ntawm marine cov nroj tsuag los yog cov tsiaj uas muaj txom nyem yav dhau los submarine cables.

Cov khoom yog ib tug loj feem Chatterton compound siv raws li ib tug insulating sealant rau hlua taws xob thiab lwm yam hluav taws xob cables. Txij li thaum 1930 goda polyethylene displaces gutta-percha li ib tug hluav taws xob insulator.

Nyob rau hauv nruab nrab ntawm lub XIX xyoo pua, gutta-percha twb tseem siv rau qhov siv thiab ua cov rooj tog, nyob rau hauv particular, lub tuam txhab "Gutta-perch", founded hauv 1847. Thaum rhuab, cov khoom yuav tsum puab ua rooj tog, ornaments or tais diav. Ib txhia ntawm cov hniav daim nyob rau hauv Renaissance style tau qhia nyob rau Great Exhibition nyob rau hauv 1851 nyob rau hauv Hyde Park nyob rau hauv London.

niaj hnub pab

Nws twb tseem siv rau qhov siv thiab ua mourning hniav nyiaj hniav kub, vim hais tias nws twb tsaus ntuj thiab yuav tau yooj yim yuav tsim mus rau hauv cov hlaws dai los yog lwm daim. Rab yaj phom tuav thiab lub xub pwg los kuj ua los ntawm gutta-percha, uas tau muab rau lawv lub dag lub zog thiab durability. Golf pob guttie, uas muaj ib tug khoom gutta-percha tub ntxhais, ua ib tug tiag tiag kiv puag ncig nyob rau hauv qhov kev ua si.

Qhov no cov ntaub ntawv uas tseem nyob loj industrial khoom nyob rau hauv lub thib nees nkaum xyoo pua, tab sis tom qab los ua maj hloov rau yav tom ntej zoo hluavtaws cov ntaub ntawv. Txawm tias nws keeb kwm ntev, lub gutta percha yog tseem siv niaj hnub no. Niaj hnub nimno cov kws kho hniav mus ntxiv rau siv nws rau sau hauv paus canals.

"Gutta-percha": tus nqi

Yuav ua li cas yog cov tswvyim no? Yog li ntawd, cia guttaperchivye - yog ua los ntawm gutta-percha (natural roj hmab). Nyob rau hauv ib tug figurative siab, lo lus no lawm mas ib tug nqi uas txuam nrog cov yooj thiab elasticity. Nrog kev xav txog lub ntsiab txhais ntawm cov neeg pib yuav tsum tau siv, thiab tau los ua ib tug neeg hauv tsev neeg lub npe tom qab sau ntawv D. V. Grigorovichem nws tu siab zaj dab neeg "gutta-percha me nyuam tub".

Qhov no yog ib tug tragic zaj dab neeg txog ib tug me nyuam tub, circus, hais txog tej uas nws yog hais tias nws twb tsis muaj cov pob txha, ces saj zawg zog thiab agile nws yog. Txij no mus, cov neeg hu ua gutta-percha - yog ncaws pob nrog ib tug zoo stretch. Nws yog tiav los ntawm ntev txoj kev kawm. Gutta-percha poj niam - ib tug txawj dhia nrig nphau, tau txais nrog koj lub cev zoo kawg yam.

gutta-percha moj yam

Gutta-percha ua li cas nws txhais li cas? Lo lus no yog tam sim no heev cob xub thiab cov tub ntxhais hluas ua dog ua dig txhais tau tias ib tug saj zawg zog, zoo nkauj, graceful. Yog hais tias peb nco qab cov lus ntawm zaj kwv txhiaj tus singer Bianca - "Gutaperchevoy moj yam peb mus rau hauv" Iarfor "(hmo ntuj qws) ...".

Ntawm no peb muaj nyob rau hauv lub siab tsis yog li ntawd ntau npaum li cas elastic thiab yoog raws li ib tug mos mos, swaying thiab graceful. Koj muaj peev xwm tej zaum hnov txog ib tug neeg hais tias nws los yog nws yog guttaperchivaya. Qhov no tej zaum yuav txhais tau li cas ib tug saj zawg zog thiab ntxim hlub. Txawm tias muaj tseeb hais tias nyob rau hauv lub dhau los lawm lub sij hawm yog txuam nrog rau cov roj hmab thiab cov gymnasts, tam sim no nws yog tseem synonymous nrog kev sib deev.

zoo kawg yooj

Gutta-percha - ib tug kuj ceeb tias saj zawg zog, yas, muaj lub sij hawm rau khoov nyob rau hauv txawv kev qhia, thiab tsis muaj prejudice rau lawv tus kheej noj qab haus huv. Qhov no feem ntau yuav pom nyob rau hauv lub circus. Nrog rau cov xov tooj no yog cov gutta-percha neeg, gymnasts thiab acrobats nrog nce lub cev yooj, stunning audiences nrog nws zoo kawg plasticity.