Using sunlight to create fuels (such
as hydrogen on the other electrode in this solar cell) with inexpensively prepared electrodes may provide a solution to the intermittency drawback of solar energy.
Not exact matches
Methane — a compound made up of one carbon atom bonded to four of
hydrogen — is, according to the Intergovernmental Panel
on Climate Change, 25 times
as potent
as carbon dioxide.
It zoomed into
hydrogen, only to put
on the brakes in the mid-2000s after regulators found that Shell vastly overbooked oil reserves, a scandal that prompted Shell to refocus
on what it saw
as the part of its business that really counted.
Other makers are also expected to join the fray,
as more
hydrogen fueling stations come
on line.
Technologies from Westport Innovations Inc. allow engines to operate
on clean - burning fuels such
as compressed natural gas (CNG), liquefied natural gas (LNG),
hydrogen and biofuels such
as landfill gas.
The Giacomini Group's Federico Fioroni told CNBC that the company's work
on hydrogen dates back to the early 2000s,
as part of a wider project looking at different sustainable sources of energy.
The pesticide is not approved for use
on plants that are combusted, such
as tobacco or cannabis, and is known to emit
hydrogen cyanide when heated.
By Eric M. Johnson SEATTLE (Reuters)- Budweiser beer maker Anheuser - Busch said
on Thursday it reserved up to 800
hydrogen - fueled semi-trucks from Nikola Motor Company
as part of...
Nikola plans to process its own
hydrogen fuel at each station with
on - site solar power, wind power or by buying electricity created through renewable sources such
as hydropower.
Budweiser beer maker Anheuser - Busch said
on Thursday it reserved up to 800
hydrogen - fueled semi-trucks from Nikola Motor Company
as part of plans to convert its dedicated long - haul fleet to renewable powered trucks by 2025.
However, the Rosina mass spectrometer aboard Rosetta found that the ratio of deuterium to
hydrogen in the comet is far greater than that found
on Earth, adding to the growing body of evidence that the water
on Earth was delivered not by comets,
as previously thought, but by asteroids.
Recently the Japanese government asked internet providers to block websites that promote suicide and suicide methods, such
as hydrogen sulphide
on the internet after their was a rash of suicides committed using these techniques in the past few months.
I believe that the sun is powered by the nuclear fusion of
hydrogen in to helium, because the spectrum of the emitted light is exactly
as predicted by theory and tested by experiment
on earth.
That is a very dry world to live in...
as far
as theory is concerned it is
as enigmatic
as religous beliefs... Example 2
hydrogen and
on oxygen make water... it is proven fact.
Hydrogen, which constitutes 74 per cent of the material of the universe and
on which the origin of life
as we know it was dependent, could not then have existed.
The question I now put and leave
as a question for the moment is this: is anything else going
on in the self - organization of snow flakes and the self - organization of
hydrogen atoms that led to the universe and us?
Despite its limited commercial exposure thus far, a handful of
hydrogen water brands are taking different approaches
as they seek to stake their respective claims
on this emerging category.
Hydrogen peroxide is safe for use
on colored fabrics
as well
as whites (unlike bleach).
Schwadron, a co-author
on the JGR paper, was the first to suggest energetic particles
as the possible mechanism for creating molecular
hydrogen.
The team interpreted a widespread decrease in the number of epithermal neutrons detected by LEND
as a signal that
hydrogen is present
on PFS.
The team thinks more
hydrogen may be found
on PFS in northern hemisphere craters
as well, but they are still gathering and analyzing LEND data for this region.
Hydrogen molecules aren't the best coolant, but they are good enough to enable giant gas clouds, millions of times
as massive
as the sun, to fall in
on themselves.
Cars running
on hydrogen fuel cells produce zero emissions, but currently, factories must use fossil fuels, such
as natural gas, or precious metals, such
as platinum, to...
His early experiments
on the composition of
hydrogen chloride and hydrochloric acid were published
as a successful textbook, Elements of Experimental Chemistry, which ran to its 11th edition by 1829.
For example, instead of using a water - based substance
as a basis for its cellular processes, a Martian organism might use
hydrogen peroxide, a molecule similar to perchlorate that is abundant
on Mars.
The United States followed in January 1958 with the 31 - pound satellite Explorer I. Even
as the nascent U.S. space program focused
on pint - size payloads, however, a research team at an obscure division of the General Dynamics Corporation was secretly drawing up plans for a monstrous 4,000 - ton spaceship that would be powered by the sequential explosions of thousands of
hydrogen bombs and would ferry hundreds of astronauts at a time across the solar system.
Dr Russo said: «With this procedure, we have found that what makes water behave anomalously is the presence of a particular arrangement of the water's molecules, such
as the tetrahedral arrangement, where a water molecule is
hydrogen - bonded to four molecules located
on the vertices of a tetrahedron.
These human - made materials were introduced in the 1990s, and researchers around the world are working
on ways to use them
as molecular sponges for applications such
as hydrogen storage, carbon sequestration, or photovoltaics.
Since relatively little matter piles up before it fuses — and fusion is a relatively weak source of X-rays — the X-rays produced in this way
on a normal pulsar are dwarfed by the X-rays produced by
hydrogen as it falls onto the pulsar.
Raymond Pierrehumbert at the University of Chicago and Eric Gaidos at the University of Hawaii in Honolulu calculated the warming effect of a
hydrogen blanket
on Earth - sized planets,
as well
as on worlds a few times more massive than our own, known
as super-Earths.
Representing the 6,000 physicists who work
on two separate detectors at the Large Hadron Collider (LHC), called CMS and ATLAS, two spokespersons said that both experiments seemed to agree,
as both their data sets suggested that the Higgs has a mass close to that of about 125
hydrogen atoms.
And if
hydrogen is fed into a fuel - cell stack — a batterylike device that generates electricity from
hydrogen and oxygen — it can propel an electric car or truck with only water and heat
as by - products [see «
On the Road to Fuel - Cell Cars,» by Steven Ashley; Scientific American, March 2005].
Though it has the potential to transform life
on Earth, metallic
hydrogen could also play a key role in helping humans explore the far reaches of space,
as the most powerful rocket propellant yet discovered.
As plug - in electric vehicle sales continue to putt along, automakers are increasingly pinning their hopes on hydrogen fuel cells as the clean vehicle technology of the futur
As plug - in electric vehicle sales continue to putt along, automakers are increasingly pinning their hopes
on hydrogen fuel cells
as the clean vehicle technology of the futur
as the clean vehicle technology of the future.
Hydrogen is «a highly flexible energy vector and energy carrier capable of serving as a weapon against climate change in a future, integrated multi-sector energy system,» said Mary - Rose de Valladares, manager of the International Energy Administration Hydrogen Implementing Agreement, which is developing a comprehensive road map on the production and utilization of hydrogen due for release early ne
Hydrogen is «a highly flexible energy vector and energy carrier capable of serving
as a weapon against climate change in a future, integrated multi-sector energy system,» said Mary - Rose de Valladares, manager of the International Energy Administration
Hydrogen Implementing Agreement, which is developing a comprehensive road map on the production and utilization of hydrogen due for release early ne
Hydrogen Implementing Agreement, which is developing a comprehensive road map
on the production and utilization of
hydrogen due for release early ne
hydrogen due for release early next year.
On the surface, the
hydrogen is cleanly burned in a turbine to produce electricity and the carbon dioxide,
as well
as processed carbon monoxide, is liquefied for underground storage.
As stars age, they fuse together heavier and heavier elements, forging helium from
hydrogen, carbon from helium and so
on up the periodic table to iron.
«We want to be just
as confident of the safety of
hydrogen in our fuel tanks and
on our street corners.»
Water molecules can exist
as one of two isomers, depending
on how the spins of their two
hydrogen atoms are orientated: ortho, where the nuclear spins are parallel to one another, and para, where the spins are antiparallel.
As bacteria fed
on the creatures that rained from above, they produced toxic gases — methane, carbon dioxide, and
hydrogen sulfide — that in turn bubbled up to poison the birds and insects flying overhead.
Over a period of months,
as Earth spins
on its axis and revolves around the sun, the Paris researchers monitor their oscillator, comparing it with the microwaves from a
hydrogen maser (microwave laser), which shouldn't be affected by Earth's motion.
The team achieved better
hydrogen yields using methanol and ethanol
as starting materials but because glucose can be derived from plant waste such
as wood pulp, straw and leftovers from corn production, the scientists will continue to work
on their approach.
If the probe happens to land
on ice, it will evaporate a sample with a little projecting tube and measure the
hydrogen there
as well.
But by building
on the basic step of achieving such high quantum efficiency for solar
hydrogen generation, we could make the process of producing a «green» fuel much greener
as well.»
Over the years, Easley produced code that went
on to be used in renewable energy research, including batteries for early hybrid vehicles,
as well
as for the high - thrust liquid oxygen / liquid
hydrogen Centaur rocket used to get space capsules into orbit.
As caterpillars grow, they take
on a characteristic chemical signature of the environment, with
hydrogen, oxygen and other elements fixed in tissues in varying amounts.
Using spectral readings from telescopes at the Keck Observatory in Hawaii, Hand has found high levels of oxidative chemicals such
as sulfate, oxygen, sulfur dioxide and
hydrogen peroxide
on Europa's surface, which are produced
as ionizing radiation from Jupiter scours it, splitting apart water molecules and sulfur compounds in the uppermost layers of its ice.
In only two weeks of driving, the district coordinator of science for the Port Chester, N.Y., public school system has driven at least 600 miles (965 kilometers)
on the car and her fuel cell Equinox has gotten
as much
as 191 miles (307 kilometers)
on its three full tanks (each holding slightly more than four kilograms, or 8.8 pounds, of compressed
hydrogen gas).
If there were too much UV light, no water could survive
on the surface because the water molecules would break up and escape through the top of the atmosphere
as hydrogen and oxygen gas.
Back then, all stars needed to form was a primordial soup of mostly
hydrogen and some helium atoms, perturbed by the effects of gravity
on minuscule differences in the density of the gases, and the mysterious substance known
as dark matter.