Directory:Mimicking Living Organisms
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Overview of Mimicking Living Organisms Directory
Rather bizarre, yet perhaps very worthwhile, new energy research efforts are focusing on the potential of mimicking the way in which living organisms produce and use energy. Such as how plants are able to convert sunlight into energy so efficiently or how nature is able to convert chemicals into thermal energy at room temperature in a highly efficient manner; a process that occurs in all living organisms (including yourself) and helps them have the energy they need to survive. It might be possible to one day build useful energy generation or storage products for mankind's power needs, or perhaps make our current energy technologies more efficient, based on the energy conversion processes used by nature every day.
Converting Chemicals Into Thermal Energy
Spontaneous ignition discovery has ORNL researcher fired up April 19, 2005
Zhiyu Hu believes it is possible to match nature's highly efficient method to convert chemicals into thermal energy at room temperature, and he has data and a published paper to support his theory.
In a paper scheduled to appear in the May 18 print issue of the American Chemical Society's Energy & Fuels, Oak Ridge National Laboratory's Hu describes a novel method to achieve spontaneous ignition and sustained combustion at room temperature. He achieves this "nano-catalytic reaction" with nothing but nanometer-sized particles of platinum stuck to fibers of glass wool in a small jar with methanol and air – with no source of external ignition.
Although this began as little more than a curiosity, Hu quickly realized that the implications could be significant because of the potential gains in energy conversion and utilization. Hu now cites possibilities in the area of distributed power generation and perhaps military and homeland defense.
While additional research needs to be performed to understand the phenomena, Hu notes that natural organisms such as microbes, plants and animals obtain energy from oxidation of the same organic chemicals at their physiological, or body, temperatures. Many of these biological reactions also use metals as part of their enzyme catalysts. Still, this is a surprising result in the field of metal catalysis.
Article Contines At Physorg.com (http://www.physorg.com/news3798.html)
Mimicking Geometric Structures in Nature
- Humpback flipper may be the key to better wind turbines - WhalePower Corp features a blade design that mimics the aerodynamically efficient design of a humpback whale’s flipper, allowing a turbine to capture more of the wind's energy, and at much lower speeds.
- PAX Scientific mimics nature's design for fans - Company designs fans, impellers, propellers, mixers based on the geometries of a whirlpool. The result is an approximate 33% improvement in efficiency, reduced noise, size and cost.
Mimicking Plants Ability to Convert Solar Energy
POWER PLANTS
As concern about the Greenhouse Effect increases, scientists have been searching for renewable power sources that do not use carbonaceous resources such as natural gas, coal and oil. The sun's light energy, if harnessed efficiently, would be one of our most abundant renewable energy sources. Photovoltaic cells fulfill this function of providing a clean source of power; however, they are expensive to produce and their maximum efficiency is only 20%. Researchers at Los Alamos National Laboratory (LANL) in New Mexico are hoping to far surpass that level with bio-solar cells that are inexpensive to produce and that mimic natural photosynthesis.
Inside the plant cell, light energy is captured to provide the fixation of CO2 into sugars for respiration. The function of bio-solar cells is to convert light or photon energy into an electric current instead of sugars. They capture a photon of light from the sun in the same way that chlorophyll in plants captures light. Chlorophyll and the pigments used in bio-solar cells are organic molecules arranged in rings and chains of conjugated bonds. They are composed of chains of conjugated alkenes and conjugated systems of cyclic pyrines arranged into porphyrin rings. Depending on the complexity of their conjugated system, these molecules absorb certain wavelengths of light and reflect and fluoresce others. This is why leaves are green.
"POWER PLANTS" Article Continues (http://www.missouri.edu/~chemrg/210w99/group_15_project1main.htm)
Mimicking Nature's Engine
Scientists at ASU’s Center for the Study of Early Events in Photosynthesis are one step closer to mimicking the way plants harvest and exploit the sun’s energy.
The researchers used a microscopic device to convert light into chemical energy, which in turn can be harnessed and used for other purposes. Ultimately the development could lead to new strategies for harnessing solar power. Related research could lead to higher crop yields, imaging agents for the earlier detection of cancerous tumors, and faster, smaller electronic circuits.
Mimicking Nature's Engine Article Continues (http://216.109.117.135/search/cache?p=mimicking+plants+solar&sm=Yahoo%21+Search&toggle=1&ei=UTF-8&u=researchmag.asu.edu/../stories/mimick.html&w=mimicking+plants+solar&d=25B9AE03E3&icp=1&.intl=us)
Mimicking Mother Nature
05/20/96 by Eric Mankin
To a chemist, a plant leaf is an automated factory that captures light from the sun - using chlorophyll - and instantly puts this energy to work to create a host of complex substances. Chemist Mark E. Thompson hopes someday to copy this trick. In the April 18 issue of Nature, he reported the first step: the creation of a "chemophyll" designed to capture solar energy for instant molecule making.
Like solid-state silicon solar cells, the prototype substance absorbs light and converts it into electrical potential. Unlike solar cells, but like chlorophyll, the new substance delivers this electrical potential in a form that's immediately usable for chemical reactions.
"This material would be inefficient at powering a device, like a radio or a hair dryer, that runs on electric current," Thompson said. "But it could be an extremely effective power source for chemical processes like breaking down water into oxygen and hydrogen or making methane [gas] out of carbon dioxide to create clean-burning fuels."
In plant photosynthesis, Thompson explains, the chlorophyll molecule instantly hands off the energy it captures to drive a series of chemical reactions synthesizing new plant tissue. This 'hand-off' mechanism also keeps the reaction going one-way, preventing loss of the captured energy.
"Materials like the one we have synthesized have a similar capability," said Thompson, an associate professor of chemistry in the College of Letters, Arts and Sciences. "Indeed, they might be called 'chemophylls,' because they could form the power source of man-made devices that, like green plants, would continuously make useful products as long as they are exposed to light."
Mimicking Mother Nature Article Continues (http://www.usc.edu/uscnews/stories/1899.html)
- Termite guts can save the planet (http://www.physorg.com/news3700.html) - The way termite guts process food could teach scientists how to produce pollution-free energy and help solve the world's imminent energy crisis, said Nobel laureate Steven Chu. (PhysOrg; April 13)
See Also
- Wikipedia's entry on Solar Energy (http://en.wikipedia.org/wiki/Solar_energy)
- Directory of Solar Power Resources (http://freeenergynews.com/Directory/Solar/index.html) at FreeEnergyNews.com
- Nanotechnology Directory @ PESWiki
