Korstmos Korstmossen (of lichenen) zijn symbiosevormen van twee of meer verschillende "symbionten" of levensvormen. Één partner is altijd een schimmel, de zogenaamde "mycobiont". Die leeft samen met een "fycobiont", een blauwwier (Cyanobacterie) of een groenwier, of een combinatie van beide. Deze symbionten zijn soms zo sterk verbonden, dat de partners niet zonder elkaar kunnen overleven. Symbiose[bewerken] De schimmel, die de grove vorm van het korstmos bepaalt, omgeeft de algen. De algen hebben ook voordeel van de schimmel: De schimmel houdt water vast, dat afkomstig is uit de lucht (regen en mist), zodat de algen het kunnen gebruiken voor de fotosynthese.De schimmel scheidt zuren uit, dat helpt bij het opnemen van mineralen voor de algen.De schimmel ligt over de algen heen en biedt daarom bescherming tegen intensief zonlicht. Leefwijze[bewerken] Over de geslachtelijke voortplanting van korstmossen is weinig bekend, hoewel de meeste tot de Ascomycota behorende soorten apothecia kunnen vormen.
Microbial cellulose - Wikipedia Microbial cellulose, sometimes called bacterial cellulose, is a form of cellulose that is produced by bacteria. It is widely used in the traditional Filipino dessert Nata de coco. The earliest articles describing microbial cellulose was from 1931, it was subsequently identified as cellulose in 1934. Production G. xylinus extrudes glycan chains from pores into the growth medium. Differences with plant cellulose Some advantages of microbial cellulose over plant cellulose include: Finer and more intricate structureNo hemicellulose or lignin to be removedLonger fiber length: much stronger and widerCan be grown to virtually any shape and thicknessCan be produced on a variety of substratesThe formula of the media used and the strain of Acetobacter xylinum will determine the quality of the pellicleMore absorbent per unit volume Disadvantages for commercial use Some issues that have prevented large-scale commercialization so far include: Functions Uses Medical
DNA 'perfect for digital storage' 23 January 2013Last updated at 13:03 ET By Jonathan Amos Science correspondent, BBC News Nick Goldman says DNA is a robust and fantastically dense storage medium Scientists have given another eloquent demonstration of how DNA could be used to archive digital data. The UK team encoded a scholarly paper, a photo, Shakespeare's sonnets and a portion of Martin Luther King's I Have A Dream speech in artificially produced segments of the "life molecule". The information was then read back out with 100% accuracy. It is possible to store huge volumes of data in DNA for thousands of years, the researchers write in Nature magazine. They acknowledge that the costs involved in synthesizing the molecule in the lab make this type of information storage "breathtakingly expensive" at the moment, but argue that newer, faster technologies will soon make it much more affordable, especially for long-term archiving. "If you keep it cold, dry and dark - DNA lasts for a very long time.
Eastern Geek: Iron Man Inspired Repulsor Beam Blaster V1.0 Homebrew repulsor beam blaster that’s designed to produce extremely intense burst of light that can be used to repulse your archnemesis, girlfriend /wife and pet cat. WARNING: The build involves high voltage and intense light so please take the necessary precautions. And please be warned that , walking around with one of this strapped to your hand may seriously jeopardize your chances with the opposite sex. Assembly The repulsor is essentially two circuits that are switched ON/OFF using a DPST switch. The source of the DC Step-up Charging Module is the good old analog cameras. The function of this circuit is to gradually step up the 3V source up until 330V, and releasing the stored charges very rapidly when triggered. Do not short the lead of a charged capacitor, it will pop in your face, literally. The purpose of the discharge switch in the schematic is to short and safely discharge the capacitor when it’s no longer in use. Assembling The Lamp The lamp reflector is a bit tricky to source.
The shape of things to come: A consumer's guide to 3D printers CES 2013 proved to be something of a coming out party for consumer-facing 3D printers. Sure MakerBot earned a fair amount of attention at last year's show with the announcement of the Replicator, which snagged its share of awards from various press outlets. This year, however, saw a relative deluge in 3D-printing representation, with strong showings from 3D Systems, FormLabs, MakerBot and the cloud-based 3D printer, Sculpteo. Even with so many companies rising to prominence, the dream of truly mainstream 3D printing still feels a ways off -- if that is indeed where we're inevitably heading. These nascent days are an exciting time, with a diverse array of companies and organizations vying to be the first to bring the technology to our homes. Most of these work by melting plastic (largely Lego-like ABS or biodegradable PLA) and squirting it out through extruder heads. 3D Systems 3D Systems has been in the 3D-printing game since before the term was coined. Bits from Bytes Eventorbot Fab@Home
Wednes-DIY: Making Natural Dyes Pin It I have been wanting to experiment with natural dyes for a while now, and with all the great new fall colors that have been popping up on our website (and featured in our monochromatic trend) I decided that it was time. This is such a fun, environmentally friendly project that takes a little time, but very little cash. For today’s DIY I’ll tell you about what natural ingredients you can use to make natural dyes, and what shades of color they will yield. What I got: red cabbage, lemons, oranges, beets, yellow onions, blackberries, blueberries, spinach. For bluish/purple dyes: Blackberries and red cabbage can be used to make bluish/purple dyes. For pinkish/red dyes: Beets and blueberries can make a really lovely dusty rose color. For copper/orange dyes: I never realized what a beautiful color yellow onions can have! For yellow dyes: Orange and lemon peels can be used to make a soft pale yellow dye. For green dyes: Finally, spinach can be used to make a beautiful shade of green. Now what?
Phanerochaete chrysosporium, a crust fungus that can degrade phenolic resin plastics! Tom Volk's Fungus of the Month for February 2007 Tom Volk's Fungus of the Month for February 2007 Please click TomVolkFungi.net for the rest of Tom Volk's pages on fungi Yes I know what you're thinking. Last summer Adam Gusse, Paul Miller and I published a paper on the biodegradation of phenolic resin plastics with Phanerochaete chrysosporium. The paper, available here, was published as Gusse, Adam, Paul Miller, and Thomas J. Our paper unleashed a storm of publicity. We were soon contacted by Nature, one of the top scientific journals in the world, who published a story on our work called Fungus eats enduring plastic. We were contacted by the European Commission on the Environment, who put out a press release through Science for Environmental Policy called Fungi may be able to degrade tough plastic. Science in the News, published by American Scientist Magazine, picked up the story and published another called Fungi May Harbor Hankering for Nearly Indestructible Plastics. We even got a little write-up in the New York Times in July 2006.
Researchers Demonstrate Reliable DNA Data Storage in Work Published in Nature DNA could someday store more than just the blueprints for life—it could also house vast collections of documents, music, or video in an impossibly compact format that lasts for thousands of years. Researchers at the European Bioinformatics Institute in Hinxton, U.K., have demonstrated a new method for reliably encoding several common computer file formats this way. As the price of sequencing and synthesizing DNA continues to drop, the researchers estimate, this biological storage medium will be competitive within the next few decades. The information storage density of DNA is at least a thousand times greater than that of existing media, but until recently the cost of DNA synthesis was too high for the technology to be anything more than a curiosity. DNA, in contrast, remains stable over time—and it’s one format that’s always likely to be useful. Others have demonstrated DNA data storage before. The encoding software also ensures some redundancy.
How to build your own USB Keylogger Cause I've searched a lot for a project like this, and I haven't find anything around the Web, I would share my experience of my personal USB Keylogger. It's not really a pure "USB" Keylogger (cause USB HID protocol is much more difficult than PS/2 protocol), but it adapt an USB Keyboard to PS/2 port, while (of course) recording the keys pressed. In this way, even if it's discovered by anybody, it should be confused with a normal PS/2 Adapter. That's the final result: It need just a few component (SOIC PIC and EEPROM can be freely ordered as a sample from ): -PIC 12F1822 (SOIC Version) -EEPROM 24XX1025 (Any 1Mb version will be ok) (SOIC Version) -2 * 4k7 Resistor 1/8 W (Or any resistor of the same value as small as you can solder in the adaptor) -Pickit 2 / 3 (For programming the pic and reading the eeprom) -An USB to PS/2 Adapter that can be opened. And, very important: -A GOOD solder and VERY GOOD soldering abilities. Let's Start. Regards, Jamby
Guest Post: Cory Doctorow for Freedom to Read Week | Blog | Raincoast Books ← Back to Blog by Dan Guest Blogger + YA Fiction / February 24, 2013 Freedom to Read Week is an annual event that encourages Canadians to think about and reaffirm their commitment to intellectual freedom, which is guaranteed them under the Charter of Rights and Freedoms. To mark this year's Freedom to Read Week, which starts today, we asked author Cory Doctorow to contribute a guest post on libraries and technology. Libraries, Hackspaces and E-waste: how libraries can be the hub of a young maker revolution Every discussion of libraries in the age of austerity always includes at least one blowhard who opines, "What do we need libraries for? Facepalm. The problem is that Mr. Libraries have also served as community hubs, places where the curious, the scholarly, and the intellectually excitable could gather in the company of one another, surrounded by untold information-wealth, presided over by skilled information professionals who could lend technical assistance where needed. Cory Doctorow