SD Dojavi
OSMRTNICE
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stdClass Object ( [id] => 1189989 [title] => Nevjerojatno otkriće znanstvenika, na dnu oceana kriju se goleme količine - šećera: ‘Dovoljno za oko 32 milijarde limenki Coca-Cole‘ [alias] => nevjerojatno-otkrice-znanstvenika-na-dnu-oceana-kriju-se-goleme-kolicine-secera-dovoljno-za-oko-32-milijarde-limenki-coca-cole [catid] => 264 [published] => 1 [introtext] => [fulltext] =>

Prema novom istraživanju ocean sadrži goleme rezerve šećera kojih nikada nismo bili svjesni.

Znanstvenici su otkrili da livade morske trave na dnu oceana mogu pohraniti ogromne količine slatkih stvari ispod svojih vijugavih listova – a postoje velike implikacije za skladištenje ugljika i klimatske promjene, piše scientalert.

Šećer dolazi u obliku saharoze (glavnog sastojka šećera koji se koristi u kuhinji), a oslobađa se iz morske trave u tlo ispod, područje na koje izravno utječe korijenje, poznato kao rizosfera. To znači da su koncentracije šećera na morskom dnu oko 80 puta veće nego što bi bile uobičajene.

Širom svijeta, morske trave mogle bi se nalaziti na do 1,3 milijuna tona saharoze, kaže istraživački tim. Drugim riječima, to je dovoljno za oko 32 milijarde limenki Coca-Cole, tako da govorimo o značajnom pronalasku skrivenog šećera.

-Morske trave proizvode šećer tijekom fotosinteze, kaže morska mikrobiologinja Nicole Dubilier s Instituta Max Planck za mikrobiologiju mora u Njemačkoj.

-U prosječnim svjetlosnim uvjetima, ove biljke koriste većinu šećera koje proizvode za vlastiti metabolizam i rast. Ali pod uvjetima jakog osvjetljenja, na primjer u podne ili tijekom ljeta, biljke proizvode više šećera nego što mogu iskoristiti ili uskladištiti. Zatim otpuštaju višak saharoze u svoju rizosferu. Zamislite to kao preljevni ventil, kazala je Dubilier.

Ono što je iznenađujuće je da taj višak šećera ne progutaju mikroorganizmi u okolnom okolišu. Kako bi to spriječile, čini se da morske trave šalju fenolne spojeve na isti način kao i mnoge druge biljke.

Ovi kemijski spojevi – koji se nalaze u crnom vinu, kavi i voću, kao i na mnogim drugim mjestima u prirodi – su antimikrobni lijekovi koji inhibiraju metabolizam većine mikroorganizama, usporavajući ih.

Istraživači su testirali svoju hipotezu u stvarnom podvodnom polju morske trave kako bi potvrdili da se to doista događa, pomoću tehnike masene spektrometrije.

-U našim eksperimentima dodali smo fenole izolirane iz morske trave mikroorganizmima u rizosferi morske trave, kaže morska mikrobiologinja Maggie Sogin s Instituta Max Planck za mikrobiologiju mora.

I doista, konzumiralo se mnogo manje saharoze u usporedbi s onim kada nisu bili prisutni fenoli.

Mali skup mikroba zapravo je uspijevao na saharozi unatoč prisutnosti fenola: istraživači misle da ti "specijalisti za mikrobe" možda daju nešto zauzvrat morskoj travi, poput hranjivih tvari koje su im potrebne za rast.

Morske trave su neki od najvažnijih ponora planeta za plavi ugljik (ugljik zarobljen u svjetskim oceanima i obalnim ekosustavima) i područje morske trave može usisati dvostruko više ugljika od šume iste veličine na kopnu i 35 puta brže.

Kada je riječ o izračunu gubitka ugljika iz livada morske trave – među najugroženijim staništima na planetu zbog ljudske aktivnosti i smanjenja kvalitete vode – znanstvenici sada mogu uzeti u obzir naslage saharoze kao i samu morsku travu.

-Ne znamo toliko o morskoj travi koliko o kopnenim staništima. Naša studija doprinosi našem razumijevanju jednog od najkritičnijih obalnih staništa na našem planetu i naglašava koliko je važno očuvati ove ekosustave plavog ugljika., kazao je Sogin za scientalert.

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Prema novom istraživanju ocean sadrži goleme rezerve šećera kojih nikada nismo bili svjesni.

Znanstvenici su otkrili da livade morske trave na dnu oceana mogu pohraniti ogromne količine slatkih stvari ispod svojih vijugavih listova – a postoje velike implikacije za skladištenje ugljika i klimatske promjene, piše scientalert.

Šećer dolazi u obliku saharoze (glavnog sastojka šećera koji se koristi u kuhinji), a oslobađa se iz morske trave u tlo ispod, područje na koje izravno utječe korijenje, poznato kao rizosfera. To znači da su koncentracije šećera na morskom dnu oko 80 puta veće nego što bi bile uobičajene.

Širom svijeta, morske trave mogle bi se nalaziti na do 1,3 milijuna tona saharoze, kaže istraživački tim. Drugim riječima, to je dovoljno za oko 32 milijarde limenki Coca-Cole, tako da govorimo o značajnom pronalasku skrivenog šećera.

-Morske trave proizvode šećer tijekom fotosinteze, kaže morska mikrobiologinja Nicole Dubilier s Instituta Max Planck za mikrobiologiju mora u Njemačkoj.

-U prosječnim svjetlosnim uvjetima, ove biljke koriste većinu šećera koje proizvode za vlastiti metabolizam i rast. Ali pod uvjetima jakog osvjetljenja, na primjer u podne ili tijekom ljeta, biljke proizvode više šećera nego što mogu iskoristiti ili uskladištiti. Zatim otpuštaju višak saharoze u svoju rizosferu. Zamislite to kao preljevni ventil, kazala je Dubilier.

Ono što je iznenađujuće je da taj višak šećera ne progutaju mikroorganizmi u okolnom okolišu. Kako bi to spriječile, čini se da morske trave šalju fenolne spojeve na isti način kao i mnoge druge biljke.

Ovi kemijski spojevi – koji se nalaze u crnom vinu, kavi i voću, kao i na mnogim drugim mjestima u prirodi – su antimikrobni lijekovi koji inhibiraju metabolizam većine mikroorganizama, usporavajući ih.

Istraživači su testirali svoju hipotezu u stvarnom podvodnom polju morske trave kako bi potvrdili da se to doista događa, pomoću tehnike masene spektrometrije.

-U našim eksperimentima dodali smo fenole izolirane iz morske trave mikroorganizmima u rizosferi morske trave, kaže morska mikrobiologinja Maggie Sogin s Instituta Max Planck za mikrobiologiju mora.

I doista, konzumiralo se mnogo manje saharoze u usporedbi s onim kada nisu bili prisutni fenoli.

Mali skup mikroba zapravo je uspijevao na saharozi unatoč prisutnosti fenola: istraživači misle da ti "specijalisti za mikrobe" možda daju nešto zauzvrat morskoj travi, poput hranjivih tvari koje su im potrebne za rast.

Morske trave su neki od najvažnijih ponora planeta za plavi ugljik (ugljik zarobljen u svjetskim oceanima i obalnim ekosustavima) i područje morske trave može usisati dvostruko više ugljika od šume iste veličine na kopnu i 35 puta brže.

Kada je riječ o izračunu gubitka ugljika iz livada morske trave – među najugroženijim staništima na planetu zbog ljudske aktivnosti i smanjenja kvalitete vode – znanstvenici sada mogu uzeti u obzir naslage saharoze kao i samu morsku travu.

-Ne znamo toliko o morskoj travi koliko o kopnenim staništima. Naša studija doprinosi našem razumijevanju jednog od najkritičnijih obalnih staništa na našem planetu i naglašava koliko je važno očuvati ove ekosustave plavog ugljika., kazao je Sogin za scientalert.

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Sergio Hanquet/AFP
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StoryEditorOCM
ŽivotNEVJEROJATNA PRIRODA

Nevjerojatno otkriće znanstvenika, na dnu oceana kriju se goleme količine - šećera: ‘Dovoljno za oko 32 milijarde limenki Coca-Cole‘

Piše MOZAIK SD
5. svibnja 2022. - 11:03
21886554
PREMIUM
Sergio Hanquet/AFP

Prema novom istraživanju ocean sadrži goleme rezerve šećera kojih nikada nismo bili svjesni.

Znanstvenici su otkrili da livade morske trave na dnu oceana mogu pohraniti ogromne količine slatkih stvari ispod svojih vijugavih listova – a postoje velike implikacije za skladištenje ugljika i klimatske promjene, piše scientalert.

Šećer dolazi u obliku saharoze (glavnog sastojka šećera koji se koristi u kuhinji), a oslobađa se iz morske trave u tlo ispod, područje na koje izravno utječe korijenje, poznato kao rizosfera. To znači da su koncentracije šećera na morskom dnu oko 80 puta veće nego što bi bile uobičajene.

Širom svijeta, morske trave mogle bi se nalaziti na do 1,3 milijuna tona saharoze, kaže istraživački tim. Drugim riječima, to je dovoljno za oko 32 milijarde lim...

#ŠEĆER#SAHAROZA#OCEAN
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11. svibanj 2024 18:52