Mabhodhoro epurasitiki akapfava anonyudza mazana emakemikari mumvura yekunwa

Ongororo ichangoburwa yakasimudza maaramu pamusoro pezvinogona kuitika pahutano hwemvura yekunwa kubva mumabhodhoro epurasitiki, uye masayendisiti anonetsekana kuti makemikari ari kupinda mumvura anogona kuva nemhedzisiro isingazivikanwe pahutano hwevanhu.Chidzidzo chitsva chinoongorora chiitiko chemabhodhoro anogona kushandiswazve, achiburitsa mazana emakemikari avanoburitsa mumvura uye nei kuapfuura nemudhishi inogona kunge iri pfungwa yakaipa.
Chidzidzo ichi, chakaitwa nevatsvakurudzi vepaUniversity yeCopenhagen, chakanangana nemhando dzemabhodhoro akapfava anosvinwa anoshandiswa mumitambo.Kunyange zvazvo izvi zvichinyanya kuwanda pasi rose, vanyori vanoti pane mikaha mikuru mukunzwisisa kwedu kuti makemikari ari mumapurasitiki aya anoenda sei mumvura yekunwa yaanobata, saka vakaita ongororo yekuzadza mamwe magwanza.
Zvose mabhodhoro ezvinwiwa zvitsva uye zvakanyanya kushandiswa zvakazadzwa nemvura yepombi yenguva dzose uye yakasara kuti igare kwemaawa makumi maviri nemana isati yasvika uye mushure mekufamba kuburikidza nedhishi redhishi.Kushandisa mass spectrometry uye liquid chromatography, masayendisiti akaongorora zvinhu zviri mumvura zvisati zvaitika uye shure kwekugezwa kwemichina uye mushure mekushambidza mashanu nemvura yepombi.
"Yakanga iri sipo iri pamusoro ndiyo yakabudisa zvakanyanya mushure mekugeza muchina," akadaro munyori anotungamira Selina Tisler. "Mazhinji emakemikari anobva mubhodhoro remvura pachayo achiripo mushure mekugezwa nemuchina uye kuwedzera kusukurudzwa. Zvinhu zvine chepfu zvakanyanya zvatakawana zvakagadzirwa mushure mekunge bhodhoro remvura raiswa mudhishi - pamwe nekuti kugeza kunopedza purasitiki, izvo Zvinowedzera kuyerera."
Masayendisiti akawana zvinhu zvinopfuura 400 zvakasiyana-siyana mumvura kubva muzvinhu zvepurasitiki, uye zvinhu zvinopfuura 3,500 kubva kune sipo yekugeza ndiro. Zvizhinji zveizvi zvinhu zvisingazivikanwi izvo vatsvakurudzi vasati vaziva, uye kunyange pane izvo zvinogona kuonekwa, inenge 70 muzana yehutu hwazvo haizivikanwi.
"Takashamiswa nehuwandu hwemakemikari akawanikwa mumvura mushure memaawa makumi maviri nemana mubhodhoro," akadaro munyori wekudzidza Jan H. Christensen. "Kune mazana ezvinhu zviri mumvura - zvinosanganisira zvinhu zvisati zvambowanikwa mupurasitiki kare, uye zvimwe Zvinhu zvinokuvadza kuhutano." Mushure mekutenderera kwedhishi, kune zviuru zvezvinhu."
Zvinhu zvakawanikwa nemasayendisiti zvakaedza zvaisanganisira photoinitiators, mamorekuru anozivikanwa kuti ane chepfu pazvipenyu, angangoita carcinogens uye endocrine disruptors.Vakawanawo mapurasitiki anopfavisa, antioxidants uye mold release agents anoshandiswa mukugadzirwa kwepurasitiki, pamwe chete nediethyltoluidine (DEET), inonyanya kushanda mumishonga inodzinga mosquito.
Masayendisiti anotenda kuti zvishoma chete zvezvinhu zvakaonekwa zvakave zvakawedzerwa nemaune kumabhodhoro panguva yekugadzira.Mazhinji acho angave akaumbwa panguva yekushandiswa kana kugadzirwa, apo chimwe chinhu chingave chakashandurwa kuva chimwe, chakadai sepurasitiki yekunyorovesa yavanofungidzira kuti yaizoshandurwa kuDEET painoderedza.
“Asi kunyange nezvinhu zvinozivikanwa izvo vagadziri vanowedzera nemaune, chikamu chiduku bedzi chechepfu chakaongororwa,” Tissler akadaro.” Saka, somutengi, hauzivi kana mumwe munhuwo zvake achakanganisa utano hwako.”
Chidzidzo chacho chinowedzera kuboka rinokura rekutsvakurudza pamusoro pekuti vanhu vanodya sei makemikari akawanda kuburikidza nekubatana kwavo nezvigadzirwa zvepurasitiki, uye zvakare kuratidza zvakawanda zvisingazivikanwe mumunda.
Christensen akati: “Tiri kunetseka zvikuru nokuderera kwemishonga inouraya zvipembenene mumvura yokunwa.” Asi patinodira mvura mumudziyo wokunwa, isu pachedu hatizenguriri kuwedzera mazana kana zviuru zvezvinhu mumvura yacho.” Kunyange zvazvo tisati tagona kutaura kana zvinhu zviri mubhodhoro rinoshandiswazve zvingakanganisa utano hwedu , asi ndingashandisa girazi kana kuti bhodhoro resimbi rakanaka mune ramangwana.”