We'll go ahead and warn you: if you're hoping to purge your mind of all things science this weekend, this post isn't the one to be reading. For the rest of you knowledge seekers, Arizona State University researcher Wayne Frasch has developed a biosensing nanodevice that could possibly revolutionize health screenings and speed up that grueling airport security process. Put simply (well, as simply as possible), he discovered that the enzyme F1– ATPase can be equipped with an optical probe and "manipulated to emit a signal when it detects a single molecule of target DNA." Currently, a prototype of the DNA detector is already being worked up, but there's no word on when (or if) the device will escape the lab and hit the commercial realm. Still not geeked out? Hit the read link and hold on for dear life.

[Via Physorg]

We like to think that NTT, Japan's dominant telephone company, is a serious corporation. So when NTT DoCoMo issues a press release claiming to have successfully demonstrated the world's first "molecular delivery system for molecular communication," we figure this must be significant. The technology and biochemistry at the foundation sure seems to be. In an experiment, NTT DoCoMo confirmed the use of synthesized DNA to transport specific molecules through the body. The process converts chemical energy into mechanical work so there's no need for an external power supply or control mechanism. The hope then is to one day plant a "biochip" in a cellphone which can read "excitement, emotion, stress or disease" from the simmering juices (blood, sweat and tears) pooled inside the meatsicles of "living organisms." This is where things start to fall apart. Seeing as how this is Japan, that ambiguous target audience means you and your pets. Robots too, just as soon as they get skin. And when the English press release claims that a bio-chipped phone could be applicable to "fortune telling" -- well, we've lost all hope.

[Thanks, StopSpamming]

While we've been spending our days padding our Xbox 360 Achievements and building castles out of Popsicle sticks, here come some science jerks all making us look bad. Researchers in the UK and Germany have managed to assemble tetrahedrons out of DNA "struts" with some chemical trickery, and then fed the shape DNA "fuel" to get the tetrahedron to contract. Some "anti-fuel" expands the shape again, creating a sort of piston with all sorts of potential. The researchers are currently working to assemble larger structures using the tetrahedrons as building blocks. Possible applications of the technology range from drug delivery to the motors of nanoscale robots, and it sounds like humanity is doomed either way.

Everyone could have their reasons for wanting to hold tight to a chunk of their DNA, and while many may just be creeped out by the whole premise, DNA Direct is offering those in the former camp an option. The outfit's DNA Archive enables customers to "store DNA in the safety and privacy of their own home" by mailing off a cheek (the one on your face, dur) swab full of double helices, which are then "shrink wrapped" using SampleMatrix technology and redelivered to the owner in lab-quality tubes and UV-resistant packaging. Should you wish to reconstitute the sample, just add a few drops of water and watch the magic take place. Three samples are included with each kit, so you can hide 'em away in varying locales if your situation necessitates such a dramatic action. The pain? $175.

[Via TGDaily]

NEC has developed what it calls the first portable DNA analyzer -- with "portable" being classified as a briefcase half a meter wide -- that integrates all five stages in the DNA analysis process. Designed to speed up criminal investigations and aid crime prevention, the technology can fully analyze DNA within 25 minutes. Heading for full production in 2008, it should be ready in preparation for any GATTACA-style societies that have appeared by next year.

Just we always wanted, a DNA tester to call our very own! We've been waiting for them to break that crucial $15k pricepoint, and now Spartan Bioscience has finally accomplished such a feat with its Spartan DX Personal DNA Analyzer. The thing can do 4 samples at a time, and takes about 30 minutes to run a Polymerase Chain Reaction to identify the perp. Unfortunately, Spartan claims the device isn't approved for anything beyond research use, but that shouldn't stop us from doing a bit of home-based forensics: no more name calling, we'll know once and for all who stole the cookie from the Engadget HQ cookie jar.

[Via Gadget Lab]

If we had a dime for every time we've been lounging around the HQ, thinking to ourselves about how much easier life would be with a DNA replicator of our very own, we could probably afford one of these $10 DIY versions. Some researchers at Texas A&M University have applied lava lamp-esque convection flow technology to the previously complicated, large and expensive field of DNA replication, with this pocket-sized replicator. The unit costs $10 to make and has no moving parts. To generate billions of identical DNA copies, it runs "polymerase chain reactions" by treating DNA at three different temperatures, running DNA-filled fluid through a tube wrapped around three metal rods heated to the different necessary temperatures. Doesn't sound too exciting when you put it that way, but the device should pave the way for DNA and RNA tests for HIV levels or tuberculosis diagnosis in developing countries.

[Via Digg]

We've seen DNA logic before (remember the MAYA-II, the DNA computer that could play tic-tac-toe?), but a new variety at Caltech has created a set of circuits that can work in salt water, possibly paving the way for cell-based computers. The researchers created a small series of circuits and included gates to perform all the binary logic functions: AND, OR, and NOT. Each gate, a set of DNA strands, receives DNA molecules as input and spits out different ones as output. They've succeeded in building 12 gates in a cascade five layers deep -- pretty simple compared to your average microchip, but nonetheless pretty impressive. Ok Caltech, we'll let your computer partner up with MAYA-II and we'll take 'em both on in a game of competitive Sudoku, how's that?

We've seen our fair share of questionably designed watches (and extraterrestrial detection devices, too), but the Biohazard timepiece takes this alien watchdog stuff to another level. Sure, the solid stainless steel design and squared motif isn't the hippest thing to fly out of Japan, but the overall aesthetics still top some wrist adornments out there, and its functionality isn't half bad either. The company makes no bones about informing you that the "red and white DNA helix bars" are actually not registering levels of alien activity around you, but rather spell out the time via colored blocks, and the date via an "alien DNA percentage" meter. Aside from fooling your friends into believing that ET resides in your guest room, this thing actually performs the single most important duty a watch is supposed to accomplish, and it can be yours for (an admittedly steep) ¥15,900 ($138).

[Via BoingBoing]

While strands of DNA may be able to pick fights with other strands, one thing that they can't do yet is play computer games -- that is, until now. In what appears to be an early proof-of-concept for DNA computing, scientists at Columbia University and the University of New Mexico have created a basic computer, called the MAYA-II, which has a molecular array of YES and AND logic gates made up of 100 DNA circuits. This allows the MAYA-II to play a complete game of Tic-Tac-Toe against a human opponent, and apparently nearly always win. However, this isn't exactly a fair test, given that the MAYA-II always goes first, and always opens with the center square. Still, even though each move takes 30 minutes to complete, the lead researcher on the project, Dr. Joanna Macdonald of Columbia, says that a DNA computer would be perfect for injection into human subjects to combat disease, because in theory, it would be able to "diagnose and kill cancerous cells or monitor and treat diabetes by dispensing insulin when needed." Useful applications aside, we're ready to take on the MAYA-II in Connect Four whenever Dr. Macdonald thinks it's ready.

[Via MedGadget]

We know that it shouldn't come as a shock anymore when researchers announce new storage technologies that promise to hold tantalizingly large amounts of data, but we were still pretty stoked to learn that a recent breakthrough at Harvard Medical School may eventually lead to DVD-size discs whose capacities approach an eye-popping 50TB. Unlike traditional optical or magnetic solutions, the disc developed by Professor V Renugopalakrishnan and his colleagues is coated with thousands of light-activated proteins called bacteriorhodopsin which are found in the membrane of a particular salt marsh microbe -- and which temporarily convert to a series of intermediate molecules when exposed to sunlight. That property allows the proteins to act as individual bits in a binary system, but since they have a tendency to return to their grounded state after mere hours or days, Renugopalakrishnan and his team modified the requisite microbes' DNA to produce proteins capable of maintaining that intermediary state for several years. Unfortunately we won't see this technology come to market anytime soon, and even when it does, 50TB capacities will still be a ways off, so it looks like we'll have to settle for those disappointing 200GB Blu-ray discs for the foreseeable future.

[Via Gotakon]