SciTech #ScienceSunday Digest – 07/2016.
Permalink here: http://www.scitechdigest.net/2016/02/brain-preservation-win-stent-bci-dna.html
Brain preservation win, Stent BCI, DNA nanocage chemistry, Cell transformation mastery, Gravity waves confirmed, Electron fluid on graphene, Laser boosts superconductivity, Better GPS, Artificial capillary networks, Protein nanoneedles.
1. Long Term Structural Brain Preservation
The brain preservation prize has been claimed by a new aldehyde-stabilised cryopreservation procedure that proves that near perfect, long term structural preservation of intact mammalian brains is possible, with every neuron and synapse appearing to be captured even after freezing and thawing http://www.brainpreservation.org/small-mammal-announcement/. This is a very big step towards validating cryonics and cryogenic preservation for life extension, stasis, and future uploading applications.
2. Stentode is a Less Invasive BCI
A DARPA team has created an electrode-laden stent as a neural recording device that, like similar conventional stents, is designed to be introduced through blood vessels in the neck to reach capillaries in the desired region of the brain in order to record neural firing and function as a less invasive brain computer interface http://www.darpa.mil/news-events/2015-02-08. Proof of concept successfully measured motor cortex signals in sheep and human studies are planned for 2017. In related news we had a new design for an implanted wireless power device for BCIs http://www.kurzweilai.net/powering-brain-implants-without-wires-with-thin-film-wireless-power-transmission-system.
3. DNA Nanocages Accelerate Enzyme Function
Self-assembled DNA origami nanocages have been formed in which enzymes are confined and localised along with their substrate molecules and serving to both accelerate the rate of enzymatic reactions and shield the enzymes from typical degradation processes https://asunow.asu.edu/20160210-chemical-cages-new-technique-advances-synthetic-biology. More complex cages and scaffolds in future might allow more sophisticated enzyme cascades that could perform a wide range of useful functions; another small step on the path to atomically precise fabrication.
4. Mogrify is a Cell Transformation Algorithm
Mogrify is a new algorithm that draws on a large database of human cell and tissue types and, according to the research team, is able to predict the optimal set of factors required to transform any cell type into any other cell type http://www.sciencealert.com/new-algorithm-points-the-way-towards-regrowing-limbs-and-organs/page-2. Initial studies have confirmed this but more are needed and it is expected to become more accurate over time as more data is acquired.
5. Gravity Waves Confirmed
In the biggest news of the week the existence of gravity waves has been confirmed by the LIGO experiment, and made possible after a large and expensive detector sensitivity upgrade https://www.quantamagazine.org/20160211-gravitational-waves-discovered-at-long-last/. The finding was confirmed by two separate, correlated detection events at two different LIGO detectors whose signal profiles matched theoretical models and predictions, and believed to be caused by a black hole merger in which three times the mass of our sun was converted into gravitational wave energy. Setting up LIGO detectors in India, Japan, and other sites will help cement gravity wave astronomy and allow pinpointing of gravity wave sources.
6. Liquid Nature of Graphene Electrons
The surface electrons on ultra-pure graphene surfaces have been observed acting like a collective fluid describable by hydrodynamics, with individual electrons behaving like massless relativistic objects https://www.seas.harvard.edu/news/2016/02/metal-that-behaves-like-water. Energy injected into the system flowed across many electrons, like a wave through water. Such a fluid allows for simulating and experimenting with black hole physics and other high energy environments. It’d be interesting to know what the other properties are for the waves in this fluid; if frictionless then energy and charge transfer without losses might be possible.
7. Laser-Boosted Superconductivity
Work to boost superconducting transition temperatures with lasers continues with a new class of fullerene materials in which laser pulses induce superconductivity at minus 170 degrees Celsius instead of minus 250 degrees Celsius without the laser https://www.mpg.de/9949877/superconductivity-fullerenes-light-induced. It is hoped that additional work helps to unveil a general mechanism by which this phenomena can be controlled at ever-higher temperatures. In related news endohedral fullerenes (fullerene cages with a single atom trapped inside) are now available commercially http://arstechnica.co.uk/science/2015/12/oxford-company-now-selling-endohedral-fullerenes-priced-at-110-million-per-gram/.
8. Consumer GPS to Centimeter Accuracy
Newly reformulated algorithms for calculating GPS position are much more efficient and look set to enable mobile and wearable devices to achieve centimeter-level positional GPS accuracy http://ucrtoday.ucr.edu/34932. The technique combines measurements from a GPS unit, an inertial measurement unit, and an internal navigation system. This should prove useful for phones, drones, and internet of things applications.
9. Better Artificial Capillary Networks for Engineered Organs
Using a $40 cotton candy machine allows researchers to spin out special hydrogels into threads that are comparable to normal capillaries and which form three dimensional microfluidic networks able to facilitate the transport of fluids, nutrients, and oxygen through bulk materials http://news.vanderbilt.edu/2016/02/cotton-candy-machines-may-hold-key-for-making-artificial-organs/. The proof of concept artificial organ structures were able to keep cells throughout the structure alive and well for much longer than other approaches and provide a promising platform on which to develop better-performing artificial organs.
10. Retractable Protein Nanoneedles
Protein nanoneedles are found in bacteria where they are used to puncture cell membranes. These structures, which rapidly extend from a coil to a needle and back again depending on changes in pH past a threshold, are being engineered as a tool in synthetic biology as an alternative mechanism to deliver material such as genes into cells http://wyss.harvard.edu/viewpressrelease/245. However, these little actuators might be commandeered en masse to create functional and responsive materials at the nanoscale, for example (i) helping to build little motors for tiny devices, (ii) altering the shape and properties of a material, or (iii) being used in controlled chemical and enzymatic production processes e.g. combined with #3 above offers interesting possibilities.
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