A study described here today at the American Geophysical Union's biennial Ocean Sciences Meeting shows that RNA's chemical building blocks fall apart within days to years at
temperatures near boiling — a finding that poses problems for some origin of life theories, especially ones picturing that life arose in scalding settings such as deep - sea hydrothermal vents.
In other words, how can organisms resist pressures of a thousand atmospheres,
temperatures near boiling or freezing point, or saturated salt brines?
But Dr. Crum advised a higher heat: «Inasmuch as the connective tissue of meat is comprised of three proteins — elastin, reticulin, and collagen — it is possible to make meat more tender by maintaining the cooking
temperature near the boiling point of water.
Not exact matches
And ALWAYS check the
temperature of the milk when it's returned to you — bottles will sometimes be heated to
near -
boiling temperatures by busy or unthinking staff!
They interpreted the deposits were formed on land, not in the ocean, by identifying the presence of geyserite — a mineral deposit formed from
near boiling -
temperature, silica - rich, fluids that is only found in a terrestrial hot spring environment.
If the planet is only one Earth mass, Jenkins says, any life there might be
near its end; the world would be on the verge of a runaway greenhouse effect, with gravity too weak to prevent its life - giving water from
boiling off into space due to rising surface
temperatures.
On Sept. 9, 2011, high
temperatures tripped a transmission line
near Yuma, Ariz., sparking a chain of events that shut down the San Onofre nuclear power plant, caused the release of untreated sewage and required San Diego residents to
boil their drinking water.
The tiny microbe works its magic at
near -
boiling temperatures, providing the first example of a blue - green alga capable of juggling multiple forms of energy production in such an inhospitable environment.
Scientists have sequenced Methanopyrus kandleri, a rod - shaped organism that produces methane and grows optimally at
temperatures near and above the
boiling point of water.
«At high obliquity,
temperatures over mid-to-high latitude continents would reach
near boiling 80 to 100 Celsius around the summer solstice under a 1 - bar nitrogen - dominated atmosphere.
Birkeland currents are interesting, although they seem to be a possible correction to direct solar irradiance only at the poles and only in the ionosphere, which is already enormously hot — between 1500C and 2500C — but so tenuous that you wouldn't feel heat if you stuck your arm out into the
near vacuum of the ionosphere, you'd feel intense cooling as your blood started to
boil and ordinary thermometers would radiate heat away faster than they would equilibrate (and hence would read very cold
temperatures).
Highly corrosive, strong mineral acids, like H2SO4, HNO3 and aqua regia, have absolutely no impact on ocean pH and are good for life even at
near boiling temperatures.
As it turns out this lowers the latent heat capacity so much you can't get anywhere
near the efficiency of choosing a higher
boiling point which was an object lesson for me in why steam engines run at very high
temperatures.
As we still slowly ascended... and the surface
temperature of the soil fell to the freezing point the solar radiation became intenser...
near the summit the
temperature in a copper vessel, over which lay two sheets of plain window glass, rose above the
boiling point of water, and it was certain that we could
boil water by the solar rays in such a vessel among the snow fields.