If an internal short-circuit occurs an electrical arc gas formation and pressure increase will be the result.
In the wake of a large internal fault the gas expands violently causing a powerful and extremely rapid pressure build up in the transformer tank.
and gas to rise dramatically. High internal pressure is undesirable for many reasons says the SINTEF scientist:
Mormile holds two patents for her work on the Soap Lake bacterium's biohydrogen formation under very alkaline and saline conditions.
Scientists have developed now a nacre-inspired nanocomposite that combines exceptional mechanical properties with glass-like transparency and a high gas-and fire-barrier.
but also for gas storage applications and food packaging. In addition, it may be used as an advanced substrate and for encapsulation of oxygen-sensitive organic electronics in flexible displays a
Gas sensors or implantable chips for medical applications which can gather information about blood sugar levels
it evaporates and the gas molecules that stick to the perovskite, creating an even layer--much like
because the Tc of 50-60 K achieved in the present study is high enough to keep the superconducting state by using a closed-cycle-gas-type cooling system without liquid helium.
making it possible to maintain the gas's high temperature with less power and reduced operating costs.
magnetic, humidity, gas and sound pressure devices. The first step was to look at fabrication methods. Top-down approaches to graphene device fabrication such as mechanical and chemical exfoliation would not work on a commercial scale,
and is produced easily may lead to better gas separation, water purification, drug delivery and DNA recognition, according to an international team of researchers.
therefore consider hundreds of menopausal women in whom NHANES scientists had measured at least one potential endocrine disruptor chemical (EDC) by gas or liquid chromatography-mass spectroscopy.
Greenhouse gases released by farming, such as methane from livestock and rice paddies, and nitrous oxides from fertilizers and other soil treatments rose 13 percent after 1990, the study concluded.
and decomposing waste produce a lot of methane. They produce so much methane, and eat so much fertilized feed,
that livestock are blamed for two-thirds of agriculture climate pollution every year. ee seeing an expansion of agricultural lands in some areas because of the growing global population,
#Weighing Gas with Sound and Microwaves NIST scientists have developed a novel method to rapidly and accurately calibrate gas flow meters,
such as those used to measure natural gas flowing in pipelines, by applying a fundamental physical principle:
When a sound wave travels through a gas containing temperature gradients, the sound wave average speed is determined by the average temperature of the gas.
Schematic diagram of a gas-filled pressure vessel. The red-to-blue shading represents the temperature gradient in the gas, with the higher (red) temperatures near the top.
The ovals represent a standing sound wave; its frequency is determined mostly by the average temperature of the gas.
The wavy line represents a resonant electromagnetic wave; its frequency is determined mostly by the length of the tank.
Wavelengths are not to scale. Schematic diagram of a gas-filled pressure vessel. The red-to-blue shading represents the temperature gradient in the gas, with the higher (red) temperatures near the top.
The ovals represent a standing sound wave; its frequency is determined mostly by the average temperature of the gas.
The wavy line represents a resonant electromagnetic wave; its frequency is determined mostly by the length of the tank.
Wavelengths are not to scale. Accurate calibrations of gas flow meters issues are of urgent interest to meter manufacturers and calibration labs, with potential impact throughout the natural gas industry.
Conventional calibrations are conducted typically during measured time intervals by flowing a gas stream through the meter being calibrated.
The quantity of gas that passes through the meter is determined by collecting the gas in a large tank and measuring its average temperature and pressure,
which in turn reveals the amount of gas. However, the process of collecting the gas in large tanks generates temperature gradients (different temperatures in different parts of the tank
which make the average difficult to measure. Those gradients persist for hours or days. Thus a fast reading is inherently inaccurate.
To get around that problem, current practice entails calibrating many small meters, one at a time, and then using them in parallel to calibrate a larger meter.
NIST innovation replaces the difficult problem of accurately measuring the average temperature of a large volume of gas with the easier problem of accurately measuring the average speed-of-sound in the gas.
Finally, they heated the top of the tank to establish a temperature difference across the gas of 4%of the average gas temperature.
%This result implies that the acoustic resonance technique could be used to measure the collected gas, even in the presence of a temperature gradient,
As blood flows through these tiny capillaries oxygen diffuses from the blood into the surrounding tissue supplying them with the essential gas.
Oxygen diffuses from the gas compartment to the microfluidic channel allowing researchers to control how much oxygen cells are exposed to.
With Vindskiptm, he has designed a cargo ship that is powered by wind and gas. Software developed by Fraunhofer researchers will ensure an optimum use of the available wind energy at any time.
It has now been published in ature Communicationshollow Fibre Filled with Gasan infrared laser pulse is sent into a hollow fibre filled with gas.
The nonlinear interaction between the light and the gas atoms in the special fibre makes different wavelengths travel at different velocities.
they focused the pulse onto a target of xenon gas ionizing the xenon atoms. Depending on the exact shape of the laser pulse the electrons ripped away from the xenon atoms can be sent into different directions. t is an ultrafast electron switchsays Tadas Balciunas.
fill it with a useful gas, which is hydrogen. Unlike any of the other currently-available drones that can stay in the air for no more than 20 to 30 minutes at a time
In a clever design feature, the Hycopter stores 120 g of hydrogen gas at 350 bar (5, 075 psi) in its existing structural tubing no separate canister is required.
The lightweight lithium-polymer hybrid fuel cell that converts the hydrogen gas into electricity to power the rotors was developed by a sister company,
and can log a distance of 148 kilometres on a single tank of gas. The one-third scale prototype is controlled remotely
works on growing metal organic frameworks onto cotton samples to create a filtration system capable of capturing toxic gas,
captures harmful gas and weaves transistors into shirts and dresses. otton is one of the most fascinating and misunderstood materials,
can be manipulated at the nano level to build nanoscale cages that are the exact same size as the gas they are trying to capture. e wanted to harness the power of these molecules to absorb gases
and drove a precise sampling pattern for more than eight hours just above a natural methane seep.
Natural methane seeps play an important but poorly understood role in the ocean ecosystem. The organisms that depend on methane from the seeps play a substantial role
not only in the marine food web but also in altering the quantity of methane released to the ocean surface and, potentially, in the overall chemistry of the ocean.
Scientists lack a clear understanding of how sedentary or slow-moving animals move between the widely separated seeps,
However, hydrogen is stored typically as a compressed gas in bulky high pressure tanks and these costly storage problems are a barrier to its use as a transport fuel of the future.
reater understanding of how the nanoscale structure of the storage material can influence gas storage capacities is expected to lead to more accurate evaluation methods for existing porous hydrogen storage materials.
Shift in focus These findings open the door to a shift in focus towards pore design with future research looking to exploit storing high density hydrogen in solid materials, rather than as a liquid or a gas q
virtually no methane emissions In addition to a near elimination of greenhouse gases associated with its growth, SUSIBA2 rice produces substantially more grains for a richer food source.
but it also the one of the largest manmade sources of atmospheric methane, a potent greenhouse gas.
Now, with the addition of a single gene, rice can be cultivated to emit virtually no methane from its paddies during growth.
With their warm, waterlogged soils, rice paddies contribute up to 17 percent of global methane emissions, the equivalent of about 100 million tons each year.
methane is about 20 times more effective at trapping heat. SUSIBA2 rice, as the new strain is dubbed,
low-methane rice that could offer a significant and sustainable solution. Researchers created SUSIBA2 rice by introducing a single gene from barley into common rice
resulting in a plant that can better feed its grains, stems and leaves while starving off methane-producing microbes in the soil.
and with colleagues at China Fujian Academy of Agricultural Sciences and Hunan Agricultural University. he need to increase starch content and lower methane emissions from rice production is recognized widely
resulting in even more methane emissions. It an issue that must be addressed. uring photosynthesis, carbon dioxide is absorbed
and convert it to methane. Researchers introduced SUSIBA2 into a common variety of rice and tested its performance against a non-modified version of the same strain.
Over three years of field studies in China, researchers consistently demonstrated that SUSIBA2 delivered increased crop yields and a near elimination of methane emissions f
such as a gas sensor, an optical switch, and even to reinforce composite materials to make them stronger.
In addition, late last year, it debuted a 6tb hard disk drive that apparently squeezed six 1tb platters without the need of helium gas like HGST-or any other exotic technologies.
The shift comes amid a downturn in the oil and gas industry as a whole: Oil prices are down to about half of their peak of $100-plus a barrel a year ago.
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