(1) A common arrangement is the positioning of single leaves spirally up the stem, which can sometimes form a striking helical pattern in the shoot apex.(2) The helical regions of the molecule are often quite variable in sequence.(3) Solid boxes show the relative positions of two predicted helical structures.(4) The presence of more than the expected number of signals indicated the existence of multiple helical forms.(5) It described his proposal for a different type of helical structure, which he called the helix.(6) The helical axis was tilted by an angle of 35u00b0 with respect to the central plane.(7) There also will be some historical notes about the helical screw and a review of the main methods for making threads in wood.(8) The secret, as the world now knows, lay in the double helical structure of DNA.(9) If a voltage is placed across the display, the helical shape is lost.(10) Upon absorption of light, the kinked helix is relaxed into a normal helical conformation.(11) However, the general helical nature of the hook and filament are similar.(12) These interactions are asymmetrically distributed about and along the helical axis.(13) The helical bias can result from an intrinsic tendency for curvature in chain direction.(14) As the tissue is heated, triple helical molecules rewind, shrinking the collagen fibers.(15) On the negative side, I really didn't care for the helical magazine system.(16) It is perfectly realistic to imagine a helical arrangement of straight molecules, as already assumed.