Manufacture our own plastic objects with a 3D printer is much cheaper than if we paid for manufactured goods, even considering the cost of buying the plastic filament. However, we can further reduce the cost if we made our own filament from plastic bottles throwaway, like those used to sell milk and bottled water. And in addition to saving money, nothing would be gained: we would be helping to preserve the environment.
The team of Joshua Pearce of the Michigan Technological University (Michigan Tech), United States, has shown in a new study to produce our own strand of plastic for 3D printer from bottles of throwaway uses less energy, often much less, to recycle those bottles conventionally.
Pearce’s team conducted an analysis of the life cycle of a typical bottle, made with high density polyethylene (HDPE). After cleaning and cutting it into pieces, it was headed by a paper shredder office or by a device known as RecycleBot, which essentially converts waste plastic into a filament for 3D printer. Read the rest of this entry »
Polonium -210 ( 210Po ) has become popular for cases such as the death of Russian spy Alexander Litvinenko, poisoned with this highly toxic radionuclide, and the historic Palestinian leader Yasser Arafat, who could face the same fate.
This isotope occurs naturally in trace amounts in water, soil and the atmosphere, but when accumulated by ingestion or inhalation, in different parts of the body (liver, spleen, kidney and bone) can cause cellular damage.
Now researchers at the University of Seville (U.S.) and the National Accelerator Centre in Spain, have evaluated the dose of polonium -210 that receives the Spanish population to consume water bottled mineral. The samples were collected in bottles of 32 trademarks. Read the rest of this entry »
The birds have cognitive abilities similar to those of mammals, but a different neuronal organization. Despite this, birds are the only animals besides mammals whose dream is also divided into the phase of sleep, called “slow wave sleep” (SWS), and the sleep phase of Rapid eye movement (REM) sleep.
During SWS sleep, the brain generates powerful electrical signals that manifest as waves of low frequency and high amplitude in the electroencephalogram (EEG).
When we turn to slow-wave sleep, these waves are transmitted by our neocortex. But the birds lack this brain structure. Instead of having it, their counterpart neurons are concentrated in bodies of neurons apparently poorly structured and layers. Read the rest of this entry »
Normally, when a glass of glass is dropped to the ground, it breaks. However, in the future, thanks to a new technology of biological inspiration, when the same glass just left with a twist and a little deformed appearance occurs.
This unique innovation is the work of the team of Francois Barthelat of the Department of Mechanical Engineering at McGill University in Canada, and the idea was to observe the mechanisms of natural structures as the sea shells, deducing that strategies could be drawn here with to significantly increase the shock resistance of glass.
The mussel shells are made of more than 95 percent of material that is very brittle in their pure form. However, nacre, also known as mother of pearl, and that is the iridescent material coating inside many of the shells of shellfish, is made of microscopic tablets that look like miniature versions of the building blocks of the legendary game Lego. Read the rest of this entry »
The side effects of eating too much caffeine (e.g., agitation, rapid heartbeat and difficulty sleeping) are well known, but recent research has shown that stimulant also has its good side. You can kill cancer cells. Now, an international team of scientists has found that the combination of caffeine-based compound and a small amount of gold could someday be used as an anticancer agent.
Caffeine and certain compounds based on it have recently been in the spotlight as potential anticancer treatments. But it is clear that drinking liters of coffee, caffeinated sodas and energy drinks, is not the solution, and the caffeine in these drinks at the levels needed to kill cancer cells, they also begin to have negative effects on healthy. Meanwhile, gold can also kill cancer cells, but, like caffeine, can damage healthy. Read the rest of this entry »
Researchers at the Medical School at Rutgers University (State University of New Jersey) in the United States, the Institute for Security and Social Services for State Workers, Juarez Hospital and National Medical Center Siglo XXI, the latter three entities in Mexico, have conducted a study, published in the journal Nature Medicine, the publisher of the prestigious journal Nature, the results suggest that electroacupuncture is potentially useful in mitigating inflammation in diseases and disorders of the type of arthritis and septicemia.
When acupuncture (which derives electroacupuncture) it first became popular in the West, had many misgivings and doubts about it. And still are. But over time, through detailed observation, scientists have obtained evidence that a portion of this ancient Chinese technique can indeed work.
Now, new research by the team of Luis Ulloa, an immunologist at Rutgers University, documents a direct connection between the use of electro-acupuncture and physical processes that could relieve inflammation resulting from sepsis, a generalized condition following a high presence of pathogenic microorganisms or their toxins in the blood of the patient. Cases of sepsis or septicemia are common in intensive care units of hospitals, and through its effects, including inflammation, end each year with the lives of many people in the world, only in the United States this figure is 250,000 people. Read the rest of this entry »
The Barcelona Centre for International Health Research (CRESIB), Spain has coordinated a study on the AP2 -G, an essential regulator of sexual reproduction of malaria parasites protein.
This protein acts as a developmental switch to activate transcription of the early genes of gametocytes, sexual forms of the parasite of the genus Plasmodium, which causes malaria.
The study, published in Nature, reveals new targets to interrupt transmission of the disease by preventing the formation and maturation of the sexual stages of the parasite essential to transmit from human to mosquito. Read the rest of this entry »
The steam generated while cooking, take a shower or put wet clothes to dry, you can condense on cold walls, encouraging the growth of mold and microbes.
Scientists have developed a special wallcovering able to avoid that problem. Its ability to absorb excess moisture from the air to prevent condensation in unwanted places is much better than that of conventional coatings.
The new coating, developed by the team of Thomas Stahl, a physicist specializing in architecture, the Swiss Federal Laboratories for Materials Science and Technology (EMPA also known collectively as EMPA Institute) and colleagues at the company Sto AG, can absorb 90 grams of water vapor per square meter. This exceeds the capacity of many conventional coatings. In addition, the new coating is easy to apply and is not much more expensive than alternative products. Read the rest of this entry »
Thanks to a new technological advancement, you can overcome a severe limitation that has always driven electron microscopes: You can not put those hydrated samples, and all living things are. So when you want to examine a hydrated sample must be frozen, like a blueberry in an ice cube, and cut into thin slices million, so that electrons can pass through properly. Only then you can observe the sample with the electron microscope and study it.
Obviously, after such treatment, the blueberry example, almost any biological sample is no longer what they were. This creates many difficulties, and can distort or even invalidate the results of investigations.
Tolou Shokuhfar, a bright and imaginative professor of mechanical engineering at Michigan Technological University (Michigan Tech), in the United States, he wondered if there might be a way to make less aggressive electron microscopes for biological samples. Save them to the samples as aggressive treatment as described would have a much more accurate and reliable than it actually occurs at the subcellular level knowledge. Read the rest of this entry »
With the isolation of microorganisms which are calcite (calcium carbonate crystals) the production of a material that provides durability to cement is studied.
Such microorganisms help seal, amicably with the environment, the microcracks present in the internal structure of biocement, since in the mix to work it may be small spaces.
To do this, Sandra Milena Montano Salazar, biology student at the National University of Colombia in Bogota, collected samples of walls and platforms of various buildings of the UN (Colombia), and the Laboratory of Microbiology immersed in saline and subjected to a process of stirring at 10 degrees Celsius for 15 days, which isolated the material for the release of the respective microorganisms. Read the rest of this entry »