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      "value" => "<p style="line-height:115%;"><span style="font-family:&quot;Times New Roman&quot;,serif;font-size:12.0pt;line-height:115%;"><strong>Még szeptember közepén is erős tüneteket okozott a parlagfű pollenje. A Nyíregyházi Egyetem kutatócsoportja Dobróné dr. Tóth Márta vezetésével olyan eredményekre jutott, amelyek segítenek megérteni, miért fokozódik a pollenallergia hatása, miért tolódik ki a szezon – és miért kell a növényt gyökerestül eltávolítani.</strong></span></p><p style="background-color:white;line-height:115%;vertical-align:baseline;"><span style="color:black;font-family:&quot;Times New Roman&quot;,serif;font-size:12.0pt;line-height:115%;"><strong>A szezon már nem ér véget augusztusban</strong></span></p><p style="background-color:white;line-height:115%;vertical-align:baseline;"><span style="color:black;font-family:&quot;Times New Roman&quot;,serif;font-size:12.0pt;line-height:115%;">Régóta ismert, hogy Magyarországon a parlagfű virágpora július közepétől jelenik meg a levegőben, augusztus 20-a körül éri el a csúcspontját, és augusztus végére lassan csökken. Az utóbbi években azonban más a helyzet: a Nyíregyházi Egyetem mérése szerint a pollenszezon rendre szeptember közepéig kitolódik. Ez nemcsak az allergiások mindennapjait keseríti meg, hanem az iskolakezdés idején a gyerekek koncentrációs képességét is ronthatja.</span></p><p style="background-color:white;line-height:115%;vertical-align:baseline;"><span style="color:black;font-family:&quot;Times New Roman&quot;,serif;font-size:12.0pt;line-height:115%;">„A légszennyezettség és a klímaváltozás miatt ma már nem számíthatunk arra, hogy a tünetek augusztus végével enyhülnek” – mondja Dobróné dr. Tóth Márta,&nbsp;főiskolai tanár.</span></p><p style="line-height:115%;"><span style="color:black;font-family:&quot;Times New Roman&quot;,serif;font-size:12.0pt;line-height:115%;"><strong>Több allergén ott,&nbsp;ahol nagyobb a forgalom</strong></span></p><p style="background-color:white;line-height:115%;vertical-align:baseline;"><span style="color:black;font-family:&quot;Times New Roman&quot;,serif;font-size:12.0pt;line-height:115%;">A kutatócsoport közel tíz éve vizsgálja a parlagfű virágporát. A forgalmas utak mentén és egy elszigetelt kontrollterületen vett minták összehasonlítása kimutatta: a szennyezettebb levegőben nagyobb mennyiségben van jelen az a pollenfehérje, amelyre az allergiások 90 százaléka érzékeny. Ez azért fontos eredmény, mert nem csak a növények számától függ, mennyire súlyosak a tünetek. Előfordulhat, hogy kevés parlagfű egyed is erős allergiás reakciót vált ki, ha a pollen a szennyezett környezet miatt több allergénfehérjét tartalmaz.</span></p><p style="background-color:white;line-height:115%;vertical-align:baseline;"><span style="color:black;font-family:&quot;Times New Roman&quot;,serif;font-size:12.0pt;line-height:115%;"><strong>Mikor a legrosszabb a levegő?</strong></span></p><p style="background-color:white;line-height:115%;vertical-align:baseline;"><span style="color:black;font-family:&quot;Times New Roman&quot;,serif;font-size:12.0pt;line-height:115%;">A helyi mérések azt is pontosították, hogyan oszlik el a pollen a nap folyamán. A koncentráció a kora reggeli órákban, 6 és 8 óra között egyenletesen nő, 10 és 11 óra között a legmagasabb, aztán folyamatosan csökken az esti órákig, majd reggel 6 óra után ismét emelkedni kezd. Ez az ismeret gyakorlati szempontból is hasznos: aki érzékeny, reggel és a délelőtti órákban lehetőleg kerülje a szabadtéri aktivitást.</span></p><p style="background-color:white;line-height:115%;vertical-align:baseline;"><span style="color:black;font-family:&quot;Times New Roman&quot;,serif;font-size:12.0pt;line-height:115%;"><strong>Új mikroszkóp, új felismerések</strong></span></p><p style="background-color:white;line-height:115%;vertical-align:baseline;"><span style="color:black;font-family:&quot;Times New Roman&quot;,serif;font-size:12.0pt;line-height:115%;">Az elektronmikroszkóppal történő vizsgálat eredményei szerint a szennyezett levegő nemcsak a kémiai összetételt változtatja meg, hanem a pollen alakját is, amely gömb alak helyett a málna terméséhez hasonló alakúvá válik. Ez befolyásolhatja, hogyan száll a szélben, és közben milyen egyéb allergéneket pl. gomba spórákat köt meg a felszínén, amelyek szintén a légutakba kerülnek – vagyis közvetlen hatása lehet a tünetek súlyosságára. A Nyíregyházi Egyetem eszközparkja a közelmúltban egy korszerű mikroszkóppal gazdagodott, amely lehetővé teszi, hogy a virágporszemeket előkészítés nélkül, természetes állapotukban vizsgálják. Ez azért jelentős, mert az előkészítő eljárások, amelyek torzíthatják a pollen szerkezetét az új mikroszkóphoz már nem szükségesek, így a kutatók pontosabb eredményt kaphatnak.</span></p><p style="background-color:white;line-height:115%;vertical-align:baseline;"><span style="color:black;font-family:&quot;Times New Roman&quot;,serif;font-size:12.0pt;line-height:115%;"><strong>Miért kell gyökerestül eltávolítani?</strong></span></p><p style="background-color:white;line-height:115%;vertical-align:baseline;"><span style="color:black;font-family:&quot;Times New Roman&quot;,serif;font-size:12.0pt;line-height:115%;">A kutatócsoport tapasztalatai alapján a kaszálás nem hatékony módszer. A levágott növény alsó hajtásaiból új virágzati tengelyek fejlődnek, és már 30–40 centiméteres magasságban is képes jelentős mennyiségű pollent kibocsátani.</span></p><p style="background-color:white;line-height:115%;vertical-align:baseline;"><span style="color:black;font-family:&quot;Times New Roman&quot;,serif;font-size:12.0pt;line-height:115%;">„Egyetlen parlagfű-növény akár nyolcmilliárd virágporszemet is termelhet. Ezért a legcélravezetőbb, ha virágzás előtt gyökerestül távolítjuk el” – hangsúlyozza Dobróné dr. Tóth Márta.</span></p><p style="background-color:white;line-height:115%;vertical-align:baseline;"><span style="color:black;font-family:&quot;Times New Roman&quot;,serif;font-size:12.0pt;line-height:115%;"><strong>Hallgatók is bekapcsolódnak a kutatásba</strong></span></p><p style="background-color:white;line-height:115%;vertical-align:baseline;"><span style="color:black;font-family:&quot;Times New Roman&quot;,serif;font-size:12.0pt;line-height:115%;">A vizsgálatokba a Nyíregyházi Egyetem hallgatói is bekapcsolódhatnak szakdolgozati és TDK-munkák keretében. A laboratóriumi elemzések terepi mintagyűjtéssel egészülnek ki, így a diákok közvetlenül tapasztalhatják meg, hogyan zajlik a tudományos kutatómunka.</span><span style="color:black;font-size:12.0pt;"> &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;</span></p><p class="text-align-justify" style="line-height:normal;margin-bottom:0cm;"><span style="color:black;font-family:&quot;Times New Roman&quot;,serif;font-size:12.0pt;">*A pollenekről a&nbsp;</span><span style="font-family:&quot;Times New Roman&quot;,serif;font-size:12.0pt;">Hitachi SU1510 típusú elektronmikroszkóppal készültek a képek. A fotókon jól láthatóak a málna termésére emlékeztető pollenformák, amelyek szennyezett területekről származnak.</span></p><p><span style="font-family:&quot;Times New Roman&quot;,serif;font-size:12.0pt;line-height:107%;">*Dobróné Dr. Tóth Márta, főiskolai tanár a&nbsp;Hitachi&nbsp;</span><span style="font-family:&quot;Aptos&quot;,sans-serif;font-size:12.0pt;line-height:107%;">S</span><span style="color:black;font-family:&quot;Aptos&quot;,sans-serif;font-size:12.0pt;line-height:107%;">U1510</span><span style="color:red;font-family:&quot;Times New Roman&quot;,serif;font-size:12.0pt;line-height:107%;">&nbsp;</span><span style="color:black;font-family:&quot;Times New Roman&quot;,serif;font-size:12.0pt;line-height:107%;">típusú elektronmikroszkóppal</span><span style="font-family:&quot;Times New Roman&quot;,serif;">, valamint a 2025-ben beszerzett Keyens 4K digitális mikroszkóppal is vizsgálja a parlagfű-mintákat&nbsp;</span></p><p class="text-align-justify" style="line-height:115%;"><span style="color:black;font-family:&quot;Times New Roman&quot;,serif;font-size:12.0pt;line-height:115%;">Fotó: Váczy Norbert</span></p><p class="text-align-center"><img src="/sites/default/files/u5/Hirek/2025/pollen1.jpg" width="487" height="557" data-entity-type="file" data-entity-uuid="9ec33889-4772-4f70-85ae-a657d980e82a" alt=""></p><p class="text-align-center"><img src="/sites/default/files/u5/Hirek/2025/pollen2.jpg" width="490" height="564" data-entity-type="file" data-entity-uuid="357b8830-8dde-449a-ae8e-96e036dfd934" alt=""></p><p class="text-align-center">A pollenekről a Hitachi SU1510 típusú elektronmikroszkóppal készültek a képek. A fotókon jól láthatóak a málna termésére emlékeztető pollenformák, amelyek szennyezett területekről származnak</p>"
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