Science. The Best Hacking Tutorial Sites - Learn Legal Hacking. PhysOrg.com - Science News, Technology, Physics, Nanotechnology, Space Science, Earth Science, Medicine. How the miracle fruit changes sour into sweet | Not Exactly Rocket Science. Pop a “miracle berry” into your mouth, and you might wonder if it was named by an overreaching marketing department. The small red fruit tastes of very little – it has a “mildly sweet tang… [like] a less flavorful cranberry”. But it’s not the taste of the fruit itself that matters. To understand why the berry gets its name, you need to eat something acidic. The berries have the ability to make sour foods taste deliciously sweet. The secret to the fruit’s taste-transforming powers is a protein called miraculin.
Two groups of scientists independently isolated miraculin from miracle berries in 1968, but people have been experiencing its effects for far longer. In the 1970s, an American company called Miralin tried to develop miraculin as a simple way of getting a sugar rush without having to gorge on cakes and sweets. While party-goers thrilled at the miracle fruit’s tongue-teasing trick, scientists were equally intrigued. Here, then, is what happens when you chomp on a miracle berry. The Last Orion. Dylex. Singularity & Futurism. Free Science Videos and Lectures: Free Education Online is Possible! The southern lights from space. Scientists create first step toward creating ‘inorganic life’
Inorganic chemical cells (iCHELLs) (credit: University of Glasgow) University of Glasgow scientists have taken their first tentative steps towards creating “life” from inorganic chemical cells (iCHELLS), potentially defining the new area of “inorganic biology.” “What we are trying do is create self-replicating, evolving inorganic cells that would essentially be alive. You could call it inorganic biology,” said Professor Lee Cronin, University of Glagow Gardiner Chair of Chemistry in the College of Science and Engineering.
The cells can be compartmentalized by creating internal membranes that control the passage of materials and energy through them, meaning several chemical processes can be isolated within the same cell — just like biological cells. The researchers say the cells, which can also store electricity, could potentially be used in all sorts of applications in medicine, as sensors or to confine chemical reactions. Ref.: Geoffrey J. T. The Guardian: Aliens could be made from iron. Artificial blood vessels created on a 3D printer. 16 September 2011Last updated at 11:49 By Katia Moskvitch Technology reporter, BBC News Artificial blood vessels could help those in urgent need of an organ transplant Artificial blood vessels made on a 3D printer may soon be used for transplants of lab-created organs.
Until now, the stumbling block in tissue engineering has been supplying artificial tissue with nutrients that have to arrive via capillary vessels. A team at the Fraunhofer Institute in Germany has solved that problem using 3D printing and a technique called multiphoton polymerisation. The findings will be shown at the Biotechnica Fair in Germany in October. Out of thousands of patients in desperate need of an organ transplant there are inevitably some who do not get it in time. In Germany, for instance, more than 11,000 people have been put on an organ transplant waiting list in 2011 alone. Continue reading the main story “Start Quote End QuoteDr Gunter TovarFraunhofer Institute, Germany Elastic biomaterials.
We are not only eating 'materials', we are also eating 'information' In a new study, Chen-Yu Zhang's group at Nanjing university present a rather striking finding that plant miRNAs could make into the host blood and tissues via the route of food-intake. Moreover, once inside the host, they can elicit functions by regulating host "target" genes and thus regulate host physiology. MicroRNAs are a class of 19-24 nucleotide non-coding RNAs that do not code for proteins. MicroRNAs bind to target messenger RNAs to inhibit protein translation. In previous studies, the same group has demonstrated that stable microRNAs (miRNAs) in mammalian serum and plasma are actively secreted from tissues and cells and can serve as a novel class of biomarkers for disease and act as signaling molecules in intercellular communication. Here, they report the surprising finding that exogenous plant miRNAs are present in the sera and tissues of various animals and that these exogenous plant miRNAs are primarily acquired orally, through food intake.
Nanotube Cables Hit a Milestone: As Good as Copper. For the first time, researchers have made carbon-nanotube electrical cables that can carry as much current as copper wires. These nanotube cables could help carry more renewable power farther in the electrical grid, provide lightweight wiring for more-fuel-efficient vehicles and planes, and make connections in low-power computer chips. Researchers at Rice University have now demonstrated carbon-nanotube cables in a practical system and are designing a manufacturing line for commercial production. Making lightweight, efficient carbon nanotube wiring as conductive as copper has been a goal of nanotechnologists since the 1980s. Individual carbon nanotubes—hollow nanoscale tubes of pure carbon—are mechanically strong and an order of magnitude more conductive than copper.
But unless carbon nanotubes are put together just so, larger structures made from them don’t have the superlative properties of the individual tubes. Free Science and Video Lectures Online! Hello everyone! This month I've various mathematics full courses from Harvard on Abstract Algebra and Sets, Counting, and Probability. And then I've a lecture on Kurt Godel, a lecture on John Nash, and visualizations of hypercomplex iterations. Abstract Algebra (Harvard) Abstract Algebra Video LecturesCourse description: Algebra is the language of modern mathematics. This course introduces students to that language through a study of groups, group actions, vector spaces, linear algebra, and the theory of fields. Course topics: Review of linear algebra. Sets, Counting, and Probability (Harvard) Sets, Counting and Probability Video LecturesCourse description: This online math course develops the mathematics needed to formulate and analyze probability models for idealized situations drawn from everyday life.
Course topics: Probability, Intuition, and Axioms. A Beautiful Mind: Genius, Madness, Reawakening: John Nash John Nash Video LectureLecture description: Dr. Hypercomplex Iterations. Misha Lemeshko's blog. Science Daily: News & Articles in Science, Health, Environment & Technology. Women have stronger immune systems than men -- and it's all down to X-chromosome related microRNA. As anyone familiar with the phrase 'man-flu' will know women consider themselves to be the more robust side of the species when it comes to health and illness.
Now new research, published in BioEssays, seems to support the idea. The research focuses on the role of MicroRNAs encoded on the X chromosome to explain why women have stronger immune systems to men and are less likely to develop cancer. The research, led by Dr Claude Libert from Ghent University in Belgium, focused on MicroRNA, tiny strains of ribonucleic acid which alongside DNA and proteins, make up the three major macromolecules that are essential for all known forms of life. "Statistics show that in humans, as with other mammals, females live longer than males and are more able to fight off shock episodes from sepsis, infection or trauma," said Libert.
"We believe this is due to the X chromosome which in humans contains 10% of all microRNAs detected so far in the genome.