“Escherichia coli” Bacteria Have Potential To Solve Mathematical Problems
26 July 2009 | Green Technology | No Comments
Science evolves every day and researchers found many things that can lead to a better future. Nowadays, science is so advanced that today we have thousands of PC models available in different sizes and performances. In this area recently a team of researchers found a new type of computer, bacterial computer, which is actually the DNA studies result on Escherichia coli bacteria, a new form of life which can solve mathematical problems (eg.Hamiltonian Path Problem).
Advanced LED Lightbulb Made from Salmon DNA
25 July 2009 | Green Technology | No Comments
Biological materials have often proved that are very efficient in various technological processes, and when they were used was even observed an increase in the obtained product efficiency. Same thing happened at the University of Connecticut, where researchers have managed to create a LED lightbulb from salmon DNA, adding fluorescent dye to salmon DNA, they bring to life a new material with a bright white light shade.
World’s Highest Efficiency in Crystalline Silicon Solar Cells
22 May 2009 | Green Technology | 2 Comments
The majority of silicon wafers used for solar cells are Czochralski(CZ) single crystalline and directional solidification, or cast, multicrystalline (mc) material.The split between the two types of wafer is presently about 55% mc-Si and 45% CZ-Si.Until 1995 CZ wafers represented 60% of the substrates used by industry and mc-Si wafers around 25%.The fast scale up of commercially available multicrystalline wafers changed the picture rapidly.The remained of the silicon substrates used by the industry are non-wafered sheets or ribbons that are of different types and have recently gained significant production figures, following long development phases.
Sanyo Electric Co. recently announced that they have surpassed the old record, creating the world’s highest efficiency silicon solar cells.HIT solar cells are 23% more efficient than normal solar cells, which means that Sanyo Electric Co. increased rate of solar cell efficiency by 0.7%.The secret of this improvement was based on reduction in optical absorption loss.
“The company stated that their new HIT solar cells consists of a single thins layer of a crystalline silicon sandwiched in between two layers of high quality ultra-thin amorphous silicon layers. These layers improve the quality of the heterojunction and also allow more sunlight to hit the power generating silicon surface. Other than this, a reduction in resistance loss also allowed Sanyo to make the cells highly efficient.” – www.ecofriend.org
Electromagnetic People Killer – Mobile Phone
4 May 2009 | Green Technology | 1 Comment
Mobile phones, called also cellular phones, are an integrating part of modern telecommunications, which offer the possibility of maintaining the continual communication without affecting the movement liberty.In many countries, more than half of the population uses mobile phones and the market develops fast.The prognosis shows that in 2009 will be, in the entire world, 1,9 bilion of surscribers of the mobile telephony services.Because of this reason it was necessary the installation of an increased number of basis station.The basis stations are radio antennas of low power that communicate with the users apparatus.At the beginning of 2000, they were about 2000 basis stations functioning in Great Britain and about 82.000 locations destined to the cellular telephony in the United States, each location including one or more basis stations.
On the pollution effects due to the mobile telephones were made numerous studies, the results of recent studies regarding the effects of the exposure to the electromagnetic fields of radio frequency (RF) on human beings are supplied by the World Health Organization, the Royal Society of Canada and by a committee of experts in Great Britain.
The RF fields get in the tissues exposed to depths that depend on frequency – until 1 cm at the frequencies used by mobile phones.The RF energy is absorbed in the body and produces tissues heating which is dispersed normally through the thermo adjustment mechanism of the body.All the proved effects of the exposure to RF are clearly connected to the heating.While the RF energy can interact with alive tissues at low levels to produce a significant heating, none of the studies did not put into evidence the unwanted effects on health at exposure levels under the authorized limits through international directives.
More studies on animals exposed to the RF fields similar to these emitted by the mobile phones have not found any proof that RF produce or favor brain tumors.While a study made in 1997 revealed the increase of the rate at which the lymphomas were developed at the mice genetically modified, the implications of this result on health are still ambiguous.Nowadays there are running more studies to confirm this observation and to determine any revelance to human cancer.Three epidemologic recent studies have not found any convincing proof of the increase of cancer risk or any other disease along with the use of the mobile phones.