What is a Helix?
A helix is a shape formed by a smooth curve. To visualize a helix, imagine a ribbon wound around a stick, or the spiral cord between a telephone handset and its base. A spiral staircase is another practical example of a helix. In biology, large molecules do not exist simply as long straight chains; instead, they coil and fold into very complex forms. The form a molecule has plays a crucial role in determining the properties and function of the molecule. A helix is one such three-dimensional shape formed by large molecules, and this shape has an important role in biology. Helices can either be right or left-handed depending on the turn of the curve around the center axis. The orientation of a helix can be determined by looking at it along its length. If the movement away from the observer is clockwise, then the helix is right-handed. If the movement is in the anti-clockwise direction, then a left-handed helix is being observed. The handedness, or chirality, cannot be changed by looking
Is it the world’s largest scooter, a smaller cousin to Honda’s own Pacific Coast. Or does it defy pigeon-holing in any conventional category? To find out I decided to put the bike through my standard testing procedure to find out exactly where its strengths and weaknesses lay. But before my two-wheeled torture test begins, let’s look at the basics: Honda’s Helix is powered by a 244cc four-stroke single and uses a V-Matic transmission to preclude the need for nasty things like a gear shifter and clutch lever. Starting is effortless – just step on the rear brake and push the start button, an automatic choke taking care of the rest. Instruments are electronic and include a speedometer that reads in metric or imperial, a clock and gauges for temperature, oil level and fuel. Another gauge reminds Helix owners that it is nearing oil change time. Everything is laid out in an informative, non-threatening manner so as not to intimidate the biking neophyte. Really, if the Helix were any more use
A helix is a repeating structure whose asymmetric units related by a translation along (Dz, the subunit rise) and rotation about (Df, the subunit rotation) the helical axis. A hypothetical helix of bacterial flagellar motors A helical particle can be polar; that is, rotating the helix 180 degrees gives rise to a distinguishable structure. In the figure above, upon 180-degree rotation, the bell-shaped structure would open downward instead of upward.
