Päivän sika siisti tiede uutinen

[ana-conda]

oon lievästi sanottuna himpun verran skeptinen rojektin toteutumisen / onnistumisen suhteen mutta toivotaan parasta

ja epäilen samaan syssyyn kyseessä olevan ns. vitsi kun noi 1km pilvenpiirtäjätkin vaatii aikamoista megainsinööritaidetiedettä pysyäkseen pystyssä

Totta se on. Se oli Starassa.

[Leper]

oon lievästi sanottuna himpun verran skeptinen rojektin toteutumisen / onnistumisen suhteen mutta toivotaan parasta

ja epäilen samaan syssyyn kyseessä olevan ns. vitsi kun noi 1km pilvenpiirtäjätkin vaatii aikamoista megainsinööritaidetiedettä pysyäkseen pystyssä

Totta se on. Se oli Starassa.

[Poistunut käyttäjä 6d3acbf4]

oon lievästi sanottuna himpun verran skeptinen rojektin toteutumisen / onnistumisen suhteen mutta toivotaan parasta

ja epäilen samaan syssyyn kyseessä olevan ns. vitsi kun noi 1km pilvenpiirtäjätkin vaatii aikamoista megainsinööritaidetiedettä pysyäkseen pystyssä

Totta se on. Se oli Starassa.

ai no hemmetti

[Nahkanuijan nuupauttaja]

Kanadalainen Thoth Technology on saanut vihreää valoa uudelle avaruusprojektilleen. Yritys valmistaa avaruuteen ulottuvan tornin, joka toimii hissinä 20 kilometrin korkeuteen. Hissitorni tulee olemaan 20 kertaa korkeampi kuin maailman korkein rakennus Burj Khalifa.

Maailman korkeimman tornin suunnittelija on Brendan Quine. Metro-lehden mukaan avaruussukkulat voivat tulevaisuudessa laskeutua tornin huipulle, jossa on aluksille suunniteltu kiitorata.

Thoth Technologyn toimitusjohtaja Caroline Roberts kertoi, että astronautit noudetaan avaruusasemille tornin kautta. Avaruussukkuloiden ei tarvitse laskeutua maan pinnalle, vaan ne voidaan varustella jatkossa tornin huipulla. Tornin tarkoituksena on myös toimia tankkausasemana.

[maganeetti]

oon lievästi sanottuna himpun verran skeptinen rojektin toteutumisen / onnistumisen suhteen mutta toivotaan parasta

ja epäilen samaan syssyyn kyseessä olevan ns. vitsi kun noi 1km pilvenpiirtäjätkin vaatii aikamoista megainsinööritaidetiedettä pysyäkseen pystyssä

Totta se on. Se oli Starassa.

ai no hemmetti

Pakko se on uskoa.

[ontuva hollantilainen]

Sea slug has taken genes from algae it eats, allowing it to photosynthesize like a plant



How a brilliant-green sea slug manages to live for months at a time "feeding" on sunlight, like a plant, is clarified in a recent study published in The Biological Bulletin.

The authors present the first direct evidence that the emerald green sea slug's chromosomes have some genes that come from the algae it eats.

These genes help sustain photosynthetic processes inside the slug that provide it with all the food it needs.

Importantly, this is one of the only known examples of functional gene transfer from one multicellular species to another, which is the goal of gene therapy to correct genetically based diseases in humans.
"Is a sea slug a good [biological model] for a human therapy? Probably not. But figuring out the mechanism of this naturally occurring gene transfer could be extremely instructive for future medical applications," says study co-author Sidney K. Pierce, an emeritus professor at University of South Florida and at University of Maryland, College Park.

The team used an advanced imaging technique to confirm that a gene from the alga V. litorea is present on the E. chlorotica slug's chromosome. This gene makes an enzyme that is critical to the function of photosynthetic "machines" called chloroplasts, which are typically found in plants and algae.

It has been known since the 1970s that E. chloritica "steals" chloroplasts from V. litorea (called "kleptoplasty") and embeds them into its own digestive cells. Once inside the slug cells, the chloroplasts continue to photosynthesize for up to nine months—much longer than they would perform in the algae. The photosynthesis process produces carbohydrates and lipids, which nourish the slug.

How the slug manages to maintain these photosynthesizing organelles for so long has been the topic of intensive study and a good deal of controversy. "This paper confirms that one of several algal genes needed to repair damage to chloroplasts, and keep them functioning, is present on the slug chromosome," Pierce says. "The gene is incorporated into the slug chromosome and transmitted to the next generation of slugs." While the next generation must take up chloroplasts anew from algae, the genes to maintain the chloroplasts are already present in the slug genome, Pierce says.

"There is no way on earth that genes from an alga should work inside an animal cell," Pierce says. "And yet here, they do. They allow the animal to rely on sunshine for its nutrition. So if something happens to their food source, they have a way of not starving to death until they find more algae to eat. "

This biological adaptation is also a mechanism of rapid evolution, Pierce says. "When a successful transfer of genes between species occurs, evolution can basically happen from one generation to the next," he notes, rather than over an evolutionary timescale of thousands of years.

[ana-conda]

Sea slug has taken genes from algae it eats, allowing it to photosynthesize like a plant



How a brilliant-green sea slug manages to live for months at a time "feeding" on sunlight, like a plant, is clarified in a recent study published in The Biological Bulletin.

The authors present the first direct evidence that the emerald green sea slug's chromosomes have some genes that come from the algae it eats.

These genes help sustain photosynthetic processes inside the slug that provide it with all the food it needs.

Importantly, this is one of the only known examples of functional gene transfer from one multicellular species to another, which is the goal of gene therapy to correct genetically based diseases in humans.
"Is a sea slug a good [biological model] for a human therapy? Probably not. But figuring out the mechanism of this naturally occurring gene transfer could be extremely instructive for future medical applications," says study co-author Sidney K. Pierce, an emeritus professor at University of South Florida and at University of Maryland, College Park.

The team used an advanced imaging technique to confirm that a gene from the alga V. litorea is present on the E. chlorotica slug's chromosome. This gene makes an enzyme that is critical to the function of photosynthetic "machines" called chloroplasts, which are typically found in plants and algae.

It has been known since the 1970s that E. chloritica "steals" chloroplasts from V. litorea (called "kleptoplasty") and embeds them into its own digestive cells. Once inside the slug cells, the chloroplasts continue to photosynthesize for up to nine months—much longer than they would perform in the algae. The photosynthesis process produces carbohydrates and lipids, which nourish the slug.

How the slug manages to maintain these photosynthesizing organelles for so long has been the topic of intensive study and a good deal of controversy. "This paper confirms that one of several algal genes needed to repair damage to chloroplasts, and keep them functioning, is present on the slug chromosome," Pierce says. "The gene is incorporated into the slug chromosome and transmitted to the next generation of slugs." While the next generation must take up chloroplasts anew from algae, the genes to maintain the chloroplasts are already present in the slug genome, Pierce says.

"There is no way on earth that genes from an alga should work inside an animal cell," Pierce says. "And yet here, they do. They allow the animal to rely on sunshine for its nutrition. So if something happens to their food source, they have a way of not starving to death until they find more algae to eat. "

This biological adaptation is also a mechanism of rapid evolution, Pierce says. "When a successful transfer of genes between species occurs, evolution can basically happen from one generation to the next," he notes, rather than over an evolutionary timescale of thousands of years.

Jo pelkästään tämän vuoksi maa pallo kannattaisi säästää

[Viserys Targaryen]

△

[Viserys Targaryen]

△

[Max Martini]

Yritys valmistaa avaruuteen ulottuvan tornin, joka toimii hissinä 20 kilometrin korkeuteen.

[Räppi-Turre]

Yritys valmistaa avaruuteen ulottuvan tornin, joka toimii hissinä 20 kilometrin korkeuteen.

Paskat housussa tässä

[Leper]

Tossa hississä on varmaan kiva tehdä "kaikki kerrokset valituiksi"-jekku.

[Räppi-Turre]

Tossa hississä on varmaan kiva tehdä "kaikki kerrokset valituiksi"-jekku.

Montakohan kerrosta on?

[Leper]

Tossa hississä on varmaan kiva tehdä "kaikki kerrokset valituiksi"-jekku.

Montakohan kerrosta on?

Veikkaukseni on, että monta tai ei kovin monta.

[Räppi-Turre]

Tossa hississä on varmaan kiva tehdä "kaikki kerrokset valituiksi"-jekku.

Montakohan kerrosta on?

Veikkaukseni on, että monta tai ei kovin monta.

Nii, en tiiä miks hirveesti chillailla siellä puolivälissä.