<prompt> Pfupisa nyaya yacho: Maererano nokumwe kuongorora kutsva, mabheya echando ari kuchinja uropi hwawo zvinokuvadza pamusana pokuwanda kwezvinhu zvinosvibisa muArctic. Masayendisiti akawana kuti zvinhu zvinokosha zvinoitika muuropi hwemabheya ari kuchamhembe zviri kuvhiringidzwa nemakemikari akagadzirwa nevanhu akadai semishonga inodzinga mavara uye inodzivirira mvura. Vanoti izvi zvingaita kuti mabheya echando achinje maitiro awo uye kuti mahormone awo asagadzikana zvobva zvapedzisira zvaita kuti asararame. Sezvo iri mhuka huru inodya dzimwe mhuka, zvinhu zvinosvibisa zviri muchikafu chenyati, zvakadai sezvataurwa pamusoro apa, zvinogona kuungana mumatehwe adzo. Zvinosvibisa, zvinozivikanwa semakemikari anonzi perfluoroalkly compounds, zvinounganidzwa munzvimbo dzakananga dzeuropi hwemabheya echando mumakore okudya zvokudya zvakasvibiswa. Makemikoro acho anopinda mumakungwa achibva mumarara anoyerera achibva panzvimbo inorasirwa marara uye zvishoma nezvishoma anopfuura nomuketani yezvokudya, achiunganidzwa muzvikara zvikuru. Rimwe boka renyanzvi dzesayenzi rakashuma misi ichangobva kupfuura iyi kuti makemikoro anosvibisa ari kuunganidzwa muArctic angave ari kuderedza kuwanda kwemapfupa ari mupenisi dzembudzi dzegondo dzembudzi. Vanzveri vepaAarhus University muDenmark vakawana kuti polychlorinated biphenyls PCBs inobatanidzwa negonzo rakashata repenisi. Vakamboratidza kuti bere dzine mwero mukuru wezvinhu zvinosvibisa zvinonzi organohalogens, izvo zvinosanganisira maPCB, mumuviri wadzo, dzine mapfupa epeni nemabhonzo maduku kudarika avhareji. Organohalogens ine kanenge halogen imwe yakadai sefluorine kana chlorine, uye inoshandiswa semanyungudutswa nemishonga inouraya zvipembenene, uyewo pakugadzira madhayi nemishonga. PCBs dzaishandiswa kugadzira pendi nezvinhu zverabha muma1930, asi dzakarambidzwa muna 2001 pashure pokunge masayendisiti awana kuti dzinogona kukonzera kenza. Vanzveri vanonyevera kuti kuvapo kwemakemikoro akadaro, ayo anowanzounganidzwa nokufamba kwenguva mumiviri yevanodya mhuka dzinovaraidza zvikuru kubva muzvokudya zvavanodya, kungava nemigumisiro ine ngwavaira pakuwanana kwebere dzomumakungwa. Sezvo mabheya echando ari mhuka dzinoparadza zvikuru muArctic, anounganidza makemikari aya akawanda. Vatsvakurudzi vakawana kuti nharaunda dzeuropi dzembudzi dzepolar umo mwero we...  <response>: Vatsvakurudzi vepaUniversity of Copenhagen vakadzidza uropi hwebhere repolar. Vakawana zvinhu zvinosvibisa zvinonzi perfluoroalkyl zvakaunganidzwa muuropi hwemhuka dzacho. Nhamba dzakakwirira dzaiva nechokuita nenhamba dzakaderera dzemaurotransmitter anokosha. Izvi zvinogona kukanganisa maitiro uye mahormone emadhora ari muzvipembenene. 