Posts filed under 'Science'
Alternative energy is all the rave lately. It’s not particularly difficult to see why it’s been such a hot topic, either. We’re all dealing with a brutal recession, and electric bills are far from cheap. On top of that, it’s pretty much impossible to turn on the news without seeing some kind of special on global warming or climate change, and how humans are pretty much killing the planet.
There are definitely some clear benefits to switching to sustainable energy. A domestic solar power setup is fairly cheap, which makes do it yourself solar power accessible to pretty much everyone. If that’s not your thing, you can always use a free energy home generator, which creates electricity through magnetic resonance. Both systems require a fairly low budget and the impact on your power bills can be enormous.
We need to stop kidding ourselves. We live in an age where turning off the lights when you leave the room and wearing a sweater instead of using heating are no longer enough to cut down electricity bills to a reasonable level. We can still live on the grid, but we need to start drawing at least some of our power from sustainable sources.
November 27th, 2009
Main Forms Of Green Energy
There are many different sources of renewable energy. All renewable energy comes from natural sources such as geothermal heat, tides, rain, wind, and sunlight. Currently only about 20% of all the energy used in the world is from renewable sources. Renewable energy is used on both large scale and small scale energy production and in many rural areas renewable energy is considered very important for energy production.
The largest percentage of renewable energy originates form the sun. Wind power is actually due to the sun because the heating and cooling of the atmosphere is responsible for the wind. The energy that is in the wind can be harnessed via wind turbines. The wind pushes the turbine and this then turns an auger which can run a generator. Wind power does not produce any carbon dioxide or methane and is the cleanest type of energy.
There are several various ways in which water power can be used. The most common form is through a dam where an electricity station will convert the energy released when the water runs form a high point to a low point. This energy can also be harnessed through flowing rivers. The energy in tides has also been converted into power as have the thermal differences in the oceans.
Solar energy is collected sunlight and this can be collected in several different ways. Solar energy can be created from photovoltaic solar cells, heating trapped air within a solar updraft tower, creating hydrogen from sunlight, heating air or water using sunlight form solar thermal panels.
Biofuel is another type of renewable energy that is created from plants. Common types of biofuel are ethanol, biodiesel and bagasse. When biofuel is burned it releases chemical energy which can be used to run things such as cars and other machinery. Biofuels create less gases than gasoline as they are up to 40% cleaner and no carbon dioxide is released.
November 7th, 2009
Solar energy doesn’t pollute the earth.
Currently there are two methods of harnessing solar energy; thermal conversion and photovoltaic conversion. Another way to generate electric power is using sunlight to create heat. This method is known as solar thermal conversion. Photovoltaic conversion uses sheets of a specialized material that can create electricity directly from the sun.
As the name implies, solar thermal conversion takes sunlight Sunlight Powered It uses properties of reflection to create intense heat. (caused by heat). The method used to start fires with a magnifying glass is called solar thermal conversion. To create a pinpoint of intense heat magnifying glass lenses are used. This means is used by real solar cells, which store heat to superheat liquids that make steam. It is the resultant product, namely the steam that sets the turbine in motion to generate electricity
Electricity is generated using Photovoltaic Conversion, which transforms sunlight into electricity. Photovaltaic cells are usually made up of two panels each of which is made up of two different layers of materials. When the two layers are touched by light, one layer gets a positive charge, while the second layer gets a negative charge. A regular battery has a positive end and a negative end and when a wire connects the two ends, they produce an electric current. An electric current is created when two layers of material located in the solar cell are exposed to light.
A sole power cell’s speed of generating electricity is relative to the brightness of the sun: the brighter the faster. The longer, more intense and most direct sunlight will produce the best results.
These days you can find many different products that are solar powered. Solar power has so many advantages including, portability when traveling or camping, and it is environmentally friendly. As previously stated if you have started a fire using a magnifying glass than you have used solar energy. Today, these mechanisms are more efficient and effective than ever. The use of solar power now and in the future is extremely bright and promising.
October 22nd, 2009
Prof. Joseph Schlessinger is one of the pioneers of the sub-field of Signal Transduction, which is paramount for cancer research, and many other fields as well.
Signal transduction refers to any process by which a cell transform a type of signal. Most signal transduction processes either involve sequences which are ordered of biochemical reactions within the cell. These are then carried out by enzymes, activated by second messengers. The overall result is a signal transduction pathway. This usually happens extremely quickly, normally in milliseconds (such as the case of ion flux). Conversely this can take minutes for the activation of lipid-mediated and protein kinase cascades. That being said, some such reactions can take many hours, days and even more. This is determined by necessity of the gene expression completion.
The amount of molecules and proteins participating in the events with regards to signal transduction expands as the process emanates from the initial stimulus, resulting in a “signal cascade,” beginning with generally a small stimulus that elicits a greater response. This is referred to as amplification of the signal.
In single-cell organisms as well as bacteria, the multitude of process of signal transduction of which the cell is capable of affects the number of ways it can respond to its environment. In multi-cellular organisms, a myriad multitude of various signal transduction processes are necessary for the coordination of the behavior and function of the comprising individual cells. This is both understandable and necessary so the whole organism can properly function. As you could expect, more complex organisms have a greater number of signal transduction processes. Consequently, getting any stimulus from the outside environment at the cellular level relies on signal transduction.
This is why countless diseases including cancer, diabetes, heart disease and many more are involved with signal transduction and are a result of a flaw of the signal transduction pathways. This work is still far from being finished and more support are needed for the better of us all.
October 17th, 2009
Dr. Joseph Schlessinger is one of the first investigators of the field of Signal Transduction, which is crucial for cancer treatment, and many other fields as well.
Signal transduction describes to any process by which cells change a type of signal. Most signal transduction processes either include sequences which are ordered of biochemical reactions inside the cell. These are then carried out by enzymes, activated by second messengers. The final result is a signal transduction pathway. This usually happens extremely quickly, normally in milliseconds (such as the case of ion flux). Conversely this can take minutes for the activation of lipid-mediated and protein kinase cascades. That being said, some such reactions can take several hours, days and even more. This is determined by necessity of the gene expression completion.
The number of molecules and proteins involved in the scenarios with regards to signal transduction grows as the process emanates from the beginning stimulus, and the result is a “signal cascade,” beginning with a relatively small stimulus that elicits a much greater response. This is referred to as amplification of the signal.
In single-cell organisms as well as bacteria, the multitude of process of signal transduction of which the cell is capable of affects the number of ways it can respond to its environment. In multi-cellular organisms, a great variety multitude of various signal transduction processes are necessary for the coordination of the behavior and function of the comprising individual cells. This is both understandable and necessary so the whole organism can properly function. As one may expect, more complex organisms have a greater number of signal transduction processes. In addition, getting any stimuli from the outside environment at the cellular level relies on signal transduction.
This is why countless illnesses including cancer, diabetes, heart disease and many more are involved with signal transduction and are a result of a flaw of the signal transduction pathways. This work is still far from being finished and additional financial support are needed for the better of us all.
October 6th, 2009
In academic circles, there is a recognized passage that countless follow, but at which very few truly excel. There are but a comparative handful of truly memorable minds in every generation, and these are the scientists that change the world. These are the finders of fundamental theories or major paradigms, groundbreaking technology, and life-saving medicine. Dr. Joseph Schlessinger is one such great mind.
During his academic career, he has created more than a ten other scientists put together. Like most of the world’s leading researchers, he had an impressive start, first receiving his Bachelor’s degree in Chemistry and Physics in 1968 from Hebrew University in Jerusalem, followed by a Masters in Chemistry in 1970 from the same place. The young Schlessinger coasted easily through those early years of academia, graduating magna cum laude both times.
Staying firmly dedicated to his end goal, he was immediately accepted to the Weizmann Institute of Science in Rehovot, Israel, where he received his Ph.D. in 1974, after submitting his successful thesis work on “Study of Chemical and Biological Systems by Circular Polarization of Fluorescence.” As a postdoc fellow between 1974 and 1976, he began his research in earnest at Cornell’s Department of Chemistry and Applied Physics.
After a exciting post doctoral experience at Cornell, he spent the next few years at progressively more important pursuits, including a position at the NIH, followed by a long tenure at the Weizmann Institute that ended in his appointment as full professor in the Department of Chemical Immunology.
More articles to come…
October 4th, 2009
In academic circles, there is a known passage that many follow, but at which almost no one truly excel. There are but a comparative handful of truly great minds in every generation, and these are the people that transform our world. These are the discoverers of great theories or major paradigms, groundbreaking technology, and life-saving medicine. Dr. Joseph Schlessinger is one such great mind.
During his academic career, he has achieved more than a dozen other scientists put together. Like most of the world’s leading scientists, he had an impressive start, first obtaining his Bachelor’s degree in Chemistry and Physics in 1968 from Hebrew University in Jerusalem, followed by a Masters in Chemistry in 1970 from the same university. The young Schlessinger coasted without effort during those early years of academia, graduating magna cum laude both times.
Staying firmly dedicated to his goal, he was immediately admitted to the Weizmann Institute of Science in Rehovot, Israel, where he received his Ph.D. in 1974, after submitting his successful thesis work on “Study of Chemical and Biological Systems by Circular Polarization of Fluorescence.” As a postdoc fellow between 1974 and 1976, he began his studies in earnest at Cornell’s Department of Chemistry and Applied Physics.
After a successful post doctoral experience at Cornell University, he spent the next few years at progressively more important pursuits, including a position at the NIH, followed by a long tenure at the Weizmann Institute that culminated in his appointment as full professor in the Department of Chemical Immunology.
More articles to come…
September 27th, 2009
What does the idea of attempting to find out how to refinish your piano yourself mark you by a feeling of remark? Don’t be afraid, in there are many companies that work in piano refinishing by villages somewhere by. It does not matter if you survive in a high populated zone, the countryside and in regions at big distance from intensively populated areas. If there exists a piano store, then these musicians are probably going to sell at least one single piano refinishing specialist among them.
In case there are luxurious veneers which seem undone, you might require a piano refinishing specialist that is able to repair the scrollwork to run it normally. The key to a magnificent side job is a stop what brings out the characteristic timber atom.
Several coats of glaze with sanding in near by and a huge application of clear coat will put an end the polishing work. A good refinishing a piano service can charge you approximately a few hundred euros anyway step well by a thousand dollars when the decoration on the piano needs to be attentively polished.
August 20th, 2009