Ukubuka: 15 Umbhali: Isikhathi Sokushicilela Isihleli Sesayithi: 2024-04-08 Umsuka: Isayithi
Emkhakheni wezokwelapha, i-barium carbonate isetshenziselwa ikakhulukazi izinjongo ezimbili eziyinhloko: ukutholwa kwezinto ezikhipha imisebe kanye njengempahla eluhlaza yezidakamizwa ezithile.
I-Barium carbonate inezinhlelo zokusebenza ezibalulekile ocwaningweni lwezokwelapha. Ngenxa yobude bayo besigamu sempilo namandla emisebe aphansi, ikhabhoni isetshenziswa kakhulu ocwaningweni lwe-pharmacokinetic kanye ne-chemical reaction mechanism, idlala indima ebalulekile ekuxilongweni kwezifo, ekuthuthukisweni kwemishanguzo emisha, neminye imikhakha. Isibonelo, ekutholweni kwe-Helicobacter pylori, umsebenzi othize ophezulu we-barium carbonate ungasebenza njengomaka, unikeze imiphumela enembile yokuthola.
I-Barium carbonate nayo isetshenziswa njengento eluhlaza yezidakamizwa embonini yezemithi. Ekuhlolweni kwe-X-ray, i-barium carbonate ingasetshenziswa njenge-ejenti ehlukile ukuze kuthuthukiswe ikhwalithi yezithombe zezokwelapha. Inganikeza ukuqhathanisa, ithuthukise ukucaca kwesithombe, futhi isize odokotela benze ukuxilonga okunembe kakhudlwana. Ngaphezu kwalokho, i-barium carbonate nayo ingasabela nge-hydrochloric acid ku-gastric acid, ngaleyo ndlela inciphise ukungakhululeki kwesisu.
Ukwakheka kwamakhemikhali: I-Barium carbonate yakhiwe nge-barium (Ba) kanye ne-carbonate (CO3), futhi iwusawoti ongaphili osesimweni samakristalu e-rhombic amhlophe noma impushana.
Isimo somzimba: I-Barium carbonate ngokuvamile ikhona ngendlela eqinile ekamelweni lokushisa nokucindezela, futhi ifomu layo eliyimpuphu livame kakhulu ekusebenzeni kwezimboni.
Ukuzinza
Ukuzinza kwe-thermal: I-Barium carbonate inokusimama okushisayo okuphezulu, nendawo yokuncibilika ecishe ibe ngu-1400 degrees Celsius. Emazingeni okushisa aphezulu, i-barium carbonate ingase ibole ekushiseni okungaba ngu-1450 degrees Celsius.
Ukuzinza kwamakhemikhali: Ngaphansi kwezimo ezijwayelekile, i-barium carbonate izinzile, kodwa iyancibilika futhi yakhe usawoti we-barium ohambelanayo ezindaweni ezine-asidi eqinile.
I-biocompatibility ye-barium carbonate incike ekusetshenzisweni kwayo kanye nomthamo. Kwezinye izimo, i-barium carbonate ingasetshenziswa njengento eluhlaza yezidakamizwa, kodwa kwezinye izimo, ikakhulukazi ngemithamo ephezulu, ingaba yingozi ezintweni eziphilayo. Isibonelo, emfanekisweni wezokwelapha, lapho i-barium carbonate isetshenziswa njenge-agent ehlukile, i-biocompatibility yayo ilawulwa ngokuqinile ukuze kuqinisekiswe ukuphepha kwesiguli. Kodwa-ke, ngenxa yobuthi be-barium carbonate, ukusetshenziswa kwayo emkhakheni wezokwelapha kudinga isiqondiso sochwepheshe kanye nokunamathela ngokuqinile emithethweni efanele kanye neziqondiso zokuphepha.
I-Barium carbonate isetshenziswa njenge-agent ehlukile emfanekisweni we-X-ray, ikakhulukazi ekuxilongweni kwezifo zesisu. Ngenxa yenombolo ye-athomu ephezulu, i-barium carbonate ayingeni kalula ngama-X-ray, ngaleyo ndlela yenza umehluko ocacile nezicubu ezizungezile emgudwini wamathumbu. Lokhu kuqhathanisa kwenza odokotela babone ngokucacile izinguquko ku-morphology kanye nokusebenza komgudu wokugaya ukudla, okuwusizo ikakhulukazi ekutholeni indawo ehlala izilonda (ezifana nezimila, ukuncipha, njll.).
Ubuchwepheshe bokulandelela i-Radioisotope bunohlu olubanzi lwezinhlelo zokusebenza ekuthuthukisweni kwezidakamizwa nesayensi yezemvelo. Ama-radioisotopes ku-barium carbonate, njenge-carbon-14, angasetshenziswa ukulebula izinhlanganisela futhi atadishe izakhiwo ze-pharmacokinetic zezidakamizwa ngokulandelela ukusatshalaliswa, ukugayeka kokudla, kanye nokuphuma kwalezi zimpawu ezinto eziphilayo. Isibonelo, ngokusebenzisa i-carbon-14 enelebuli ye-barium carbonate, abacwaningi bangakwazi ukuqapha ngokunembile izindlela ze-metabolic kanye nokuphuma kwezidakamizwa kumamodeli ezilwane noma abantu.
Ngaphezu kwalokho, ubuchwepheshe bokulandelela isotopu obunomsakazo bungasetshenziselwa ukuqapha imvelo, ukuhlola indlela yokuziphatha nezindlela zokufuduka kwezinto zamakhemikhali emvelweni. Ngokulebula izinhlanganisela ezithile, abacwaningi bangakwazi ukulandelela izinqubo zabo zokusatshalaliswa nokuguqulwa enhlabathini, emanzini, nasemkhathini
I-Barium carbonate ingasebenza njengomthwali wezidakamizwa ukusiza ekuthuthweni nasekufakweni kwendawo kwezidakamizwa emzimbeni. Ngenxa yokuvumelana kwayo okuhle kwe-biocompatibility nokuncibilika okulungiswayo, i-barium carbonate ingasetshenziswa njengesithwali sokukhishwa okuzinzile noma esilawulwayo sokukhululwa kwezidakamizwa. Ngokuhlanganisa izidakamizwa ne-barium carbonate, ukuzinza kwezidakamizwa kungathuthukiswa, ukuchithwa kwezidakamizwa emzimbeni kungancishiswa, ngaleyo ndlela kuthuthukise ukusebenza kwezidakamizwa nokunciphisa imiphumela emibi.
Ukwengeza, ubukhulu bezinhlayiyana kanye ne-morphology ye-barium carbonate ingalawulwa ngokusebenzisa izindlela zokuhlanganisa amakhemikhali, ezivumela ukuthi isebenze njengengxenye yesistimu yokulethwa kwezidakamizwa okuhlosiwe ukuletha izidakamizwa ngokuqondile endaweni ethintekile, njengezicubu zesimila. Le ndlela ingakhuphula ukugxila kwezidakamizwa endaweni ngenkathi inciphisa umthelela wazo ezicutshini ezivamile, ngaleyo ndlela ithuthukise ukusebenza kahle kokwelashwa nokunciphisa imiphumela emibi.
Ukusetshenziswa kwe-barium carbonate ekulawuleni ukukhululwa kwezidakamizwa kubonakala ikakhulukazi ekulawuleni kwayo izinga lokukhululwa kwezidakamizwa. Ngokushintsha izakhiwo ezingokoqobo nezamakhemikhali ze-barium carbonate, njengosayizi wezinhlayiyana, i-morphology, nezakhiwo ezingaphezulu, izinga lokukhululwa kwezidakamizwa kumthwali lingathinteka. Isibonelo, izinhlayiya ezinkulu ze-barium carbonate zingase zehlise izinga lokukhululwa kwezidakamizwa, kuyilapho izinhlayiya ze-barium carbonate eziguquliwe zinganikeza ukukhululwa kwezidakamizwa ngokushesha.
Ukwengeza, i-barium carbonate ingaphinde ihlangane nama-molecule ezidakamizwa ngokusebenzisa i-adsorption ebonakalayo noma i-chemical bonding ukuze yakhe izakhiwo ezithwala izidakamizwa. Le nkimbinkimbi ingasabela ekushukunyisweni okuthile komzimba emzimbeni, njengokushintsha kwe-pH, umsebenzi we-enzyme, noma ukushintsha kwezinga lokushisa, ngaleyo ndlela kuzuze ukukhululwa kwezidakamizwa okusabelayo. Lolu hlelo oluhlakaniphile lokulethwa kwezidakamizwa lungathuthukisa umphumela wokwelapha wezidakamizwa futhi lunciphise umthelela wazo ezicutshini ezivamile.
Ubuchwepheshe bokulebula amaseli buvumela abacwaningi ukuthi balandelele futhi babheke ama-biomolecule athile kumaseli aphilayo noma angaguquki, ngaleyo ndlela bathole ukuqonda okujulile kwesakhiwo nokusebenza kweseli. Ngokusebenzisa omaka be-fluorescent abafana namaprotheni e-fluorescent nodayi, abacwaningi bangakwazi ukubona ngokuqondile izinqubo eziguquguqukayo ngaphakathi kwamaseli ngaphansi kwesibonakhulu. Lezi zomaka zingabophezela ngokuqondile ekuqondiseni ama-molecule, njengamaprotheni, ama-nucleic acid, noma ezinye izingxenye zeselula, okubangela izakhiwo ezithile ezingaphakathi kwamaseli ukuthi zikhiphe ukukhanya ngaphansi kwesibonakhulu se-fluorescence.
Amasu okucabanga, okuhlanganisa i-confocal microscopy, i-two-photon microscopy, ne-super-resolution microscopy, ahlinzeka ngokusebenza okuphezulu kokulungiswa kwe-itermolecular ngaphakathi kwamaseli. Ukwengeza, ubuchwepheshe bezithombe ezibukhoma buvumela ukubhekwa kwesikhathi sangempela kokuqhubeka kwesifo kanye nokusabela kokwelashwa kumamodeli ezilwane, okuhlinzeka ngolwazi olubalulekile locwaningo lwemishini yezifo nokuthuthukiswa kwezidakamizwa.
I-Biomineralization ibhekisela esimweni lapho izinto eziphilayo zakha amaminerali angaphili emizimbeni yawo ngezinqubo ze-biochemical. Le nqubo ikhona kabanzi emvelweni, njengokwakheka kwezixhobo zamakhorali, unina weparele, namathambo. Ocwaningweni lwe-biomedical, ucwaningo lwe-biomineralization lusiza ukuthuthukisa amasu amasha okwelapha, njengokusebenzisa izimiso ze-biomineralization ukulungisa ukukhubazeka kwamathambo noma ukulimala kwamazinyo.
Abacwaningi bangahlanganisa izinto ze-biomedical ezinezakhiwo ezithile, njenge-hydroxyapatite ne-calcium carbonate, ngokulingisa izinqubo ze-biomineralization emvelweni. Lezi zinto ezisetshenziswayo zinokuvumelana okuhle kwe-biocompatibility kanye ne-biodegradability futhi zingasetshenziswa ezinhlelweni zokulethwa kwezidakamizwa kanye nobunjiniyela bezicubu. Ukwengeza, ucwaningo mayelana ne-biomineralization lusiza futhi ukuqonda ukuthi amangqamuzana alawula kanjani ukwakheka kanye nokubekwa kwamaminerali, okubaluleke kakhulu ekuthuthukisweni kwezinto ezintsha ze-biomaterials kanye namasu okwelapha.
