Slashdot is powered by your submissions, so send in your scoop


Forgot your password?

Slashdot videos: Now with more Slashdot!

  • View

  • Discuss

  • Share

We've improved Slashdot's video section; now you can view our video interviews, product close-ups and site visits with all the usual Slashdot options to comment, share, etc. No more walled garden! It's a work in progress -- we hope you'll check it out (Learn more about the recent updates).

PC Games (Games)

+ - Cyberporn to be easier to find on Second Life-> 1

Submitted by DanielRavenNest
DanielRavenNest (107550) writes "Second Life has plans to separate adult content both geographically and in its internal search engine starting with the 1.23 client software. There will be a new mainland continent on their grid, presently unnamed but jokingly referred to as Pornadelphia, which will be strictly adult map regions. Their search will also include ratings flags and filters to allow search by ratings level (PG, Mature, or Adult). More Detailed summary is here."
Link to Original Source

+ - Plants to quantum mechanics->

Submitted by
Kristina at Science News
Kristina at Science News writes "We all learn about photosynthesis in school: sunlight in, plant food out. Not well understood is how this process achieves its initial and uniquely high efficiency in capturing the energy of a photon. Quantum mechanics may be at work in the electron transfer process inside chloroplast, giving electrons the chance to consider many paths at once before choosing the best one."
Link to Original Source

+ - Cow genome sequenced

Submitted by
Smivs writes "The BBC are reporting that the genome of a female Hereford cow has been sequenced, which could be a starting point for major improvements in the agricultural industry. The information is likely to have a major impact on livestock breeding. The study, published in the journal Science, was a six-year effort by more than 300 scientists in 25 countries. Cattle now join an elite group of animals to have had their genome sequenced — a group that includes humans, other primates and rodents."

Comment: Re:Just around the corner... (Score 1) 139

by treddy (#27048591) Attached to: Advance In Making Stem Cells From Skin

how much scientific effort has been displaced into "finding other ways to make stem cells" that could otherwise have gone into "finding ways to use stem cells to treat medical conditions".

The key difference here is that, ideally, you'd like to be treated with your own stem cells. Think organ transplants -- you could get stem cells from some embryonic source, but your body would likely reject them. I'm not a proponent of recent science-policy regarding stem cells but, in retrospect, these "workarounds" may end up being critical discoveries on the path to cell-based therapy.


+ - Nanopore DNA Sequencing

Submitted by treddy
treddy (1445685) writes "Recent advances in DNA sequencing technology have revolutionized genomics and molecular biology. This week, Oxford Nanopore published proof-of-concept of their revolutionary new DNA sequencing technology (video) that uses modified protein nanopores to sequence DNA at a rate of up to 50 nucleotides / second, far faster than currently available techniques. In their approach, DNA nucleotides are cleaved one-by-one, and pass through a nanopore spanning a lipid membrane across which an electrical volatage is applied. As the nucleotide passes through the pore, the identify of the nucleotide is identified based on the current measured across the pore. The technology is the first to eliminate the need for expensive florescent-labeled nucleotides. Perhaps more importantly, however, is the ability to directly sequence 5-methyl cytosine (a.k.a. "the fifth base"), which is crucial to our understanding of development and disease."

Comment: Re:Kicks ass on Moore's Law... (Score 1) 239

by treddy (#26335773) Attached to: New Method To Revolutionize DNA Sequencing
You can also pretty easily show that our ability to sequence DNA is growing much faster than Moore's law. Right now, we seem to be in a nice world where we can process all the DNA we sequence, but we are already getting to the limits of pretty high powered workstations. The next step will probably tax the high powered cluster computers. But, assuming this rate keeps up, we quickly will reach a state where sequencing will be cheap and easy, and computer power will become the rate limiting step.

Comment: Single Molecule Sequencing Rocks (Score 1) 239

by treddy (#26335607) Attached to: New Method To Revolutionize DNA Sequencing
One of the real advances here is the ability to do this on a single molecule. Existing DNA sequencing techniques all depend on an amplification step, known as ploymerase chain reaction (PCR), in which the DNA is iteratively duplicated (this is done by basically hijacking DNA replication machinery from bacteria). However, PCR introduces numerous biases in the final population of DNA molecules: shorter segments and certain sequences are easier to duplicate than others. As a result, what you end up sequencing is always skewed. This may not be too important when it comes to (re)sequencing a genome, but there are a whole cadre of experimental techniques that use sequencing to investigate regulation and modification of DNA, and here that bias can really skew findings and generate many false positives (things that amplify too easily) and negatives (things that don't amplify well at all).

What the world *really* needs is a good Automatic Bicycle Sharpener.