How to fix your brakes. Pic: Juliana Bikes/Santa Cruz Bikes Off-roader brakes issue lots of contumely. They’re tasked with abrasion a hurtling lump of sword, aluminium, or c—positive a rider—to a condom stoppage, holding a tantalise from turn into a shipwreck. If your saucer brakes riot when you hug the levers, one of your rotors may sustain place of alinement—a trouble you can fix in a couplet of proceedings with an allen sprain. Offset, twisting your pedal wheels one at a clip to influence which is the offending bracken. When you’ve Read more [...]
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A group of Japanese scientists has designed nanomotors working by changing the conformation of the DNA molecule - the transition from the double helix pravozakruchennoy (B-form) in the left-twisted (Z-form). "Run" is the motor by changing the concentration of ions in solution. Securing the motor in a rigid frame that fixes it to the substrate, not interfering with the rotation of the rotor, the scientists managed by atomic force microscopy to monitor the operation of the engine in real time. They fixed two turns of the rotor, which is one BZ-transition.Fig. 1. Top: scheme of rotation Read more [...]
Aboutdnazhdy in November-December elekstrichestvo completely ended, I realized that something has to be done quickly. I also realized that a powerful sail windmill I quickly did not collect. Nikita prompted me to look towards the vertical axis "Savonius". After reviewing a lot of material on the Internet, I chose the profile Ugrinskogo KA, who developed this model in the Soviet Union before WWII.
Efficiency of the modules stated almost 46%. To check I collected from several different beer cans vetryachkov. Experience clearly Read more [...]
Here we assume that the global A-ta-ta came and covered himself with a whole civilization copper basin. Connection is not present, no light-cho do xs. But there are paranoid as we are, and it means that civilization is still hope. Of course 90% of us couch survivalist, and serious group survival, we will soon burden than a help. Of this situation is the output has the knowledge that will give you a distinct priimuschestvo before all others. Even if you are a serious survivalist- then this article (as well as some that are similar in a moment) will help you organize your site so that your flashlights Read more [...]
Centrifugation - a division of mechanical mixtures into their component parts by centrifugal force. Instruments used for this purpose is called centrifuges. The main part of a centrifuge rotor mount it nests for centrifuge tubes. The rotor rotates at high speed, so that creates sizeable centrifugal force, under which there is a division of mechanical mixtures, such as deposition of particles suspended in a liquid.
Centrifuges: 1 - Manual 2 - electric.Clinical and hygiene laboratories centrifugation Used to separate the red blood cells from blood plasma, blood clots from whey, the liquid from Read more [...]