Helical Coil
Helical Coil - Related Videos
12:24
Helical Organization of Blood Coagulation Factor VIII on Lipid Nanotubes
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Cited by 9 •
2014
We present a combination of Cryo-electron microscopy, lipid nanotechnology, and structure analysis applied to resolve the membrane-bound structure of two highly homologous FVIII forms: human and porcine. The methodology developed in our laboratory to helically organize the two functional recombinant FVIII forms on negatively charged lipid nanotubes (LNT) is described.
09:22
Self-assembling Morphologies Obtained from Helical Polycarbodiimide Copolymers and Their Triazole Derivatives
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2017
Here, we present a protocol to prepare and visualize secondary structures (e.g., fibers, toroidal architectures, and nano-spheres) derived from helical polycarbodiimides. The morphology characterized by both atomic force microscopy (AFM) and scanning electron microscopy (SEM) was shown to depend on molecular structure, concentration, and the solvent of choice.
11:14
Combining Wet and Dry Lab Techniques to Guide the Crystallization of Large Coiled-coil Containing Proteins
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Cited by 2 •
2017
We describe a framework incorporating straightforward biochemical and computational analysis to guide the characterization and crystallization of large coiled-coil domains. This framework can be adapted for globular proteins or extended to incorporate a variety of high-throughput techniques.
07:00
How to Use the H1 Deep Transcranial Magnetic Stimulation Coil for Conditions Other than Depression
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Cited by 13 •
2017
The H1 deep transcranial magnetic stimulation coil is FDA-cleared for the treatment of depression. We demonstrate how to utilize the H1 for other conditions, such as auditory hallucinations and PTSD, by moving the helmet to different locations over the subject's skull.
12:38
Structure of HIV-1 Capsid Assemblies by Cryo-electron Microscopy and Iterative Helical Real-space Reconstruction
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Cited by 8 •
2011
This article describes a method to obtain a three-dimensional (3D) structure of helically assembled molecules using cryo-electron microscopy. In this protocol, we use HIV-1 capsid assemblies to illustrate the detailed 3D reconstruction procedure for achieving a density map by the iterative helical real-space reconstruction method.
FAQs
Each current-carrying turn generates a magnetic field, and the repeated winding places the turns so their contributions reinforce in the axial direction. This reinforcement gives the coil an electromagnet-like field rather than the field pattern of an isolated conductor. The axial concentration makes the geometry useful when experiments or devices require a controllable magnetic field.
A changing current produces an induced voltage in the coil and changes the energy stored in its magnetic field. This behavior is central to the coil’s role as an inductor, because electrical changes are linked to magnetic energy storage. Investigating that response helps connect current, induced voltage, and magnetic-field behavior in physics experiments.
Its repeated three-dimensional winding concentrates the effects of many turns within a relatively compact length. Electrically, the turns support magnetic-field production, induction, and energy storage. Mechanically, the same helical form can behave elastically, allowing the coil to function as a spring. Thus, one geometry supports coupled electrical and structural investigations.
A suitable investigation can examine force, magnetic-field distribution, inductance, and resonance. These quantities represent different consequences of the same wound structure: force relates to electromagnetic action, field distribution describes how the magnetic effect is arranged, inductance concerns electrical response, and resonance concerns oscillatory behavior. Together, they provide a broad picture of coil performance.
When used as an inductor, the coil links electrical behavior to its magnetic field. Current produces the field, while changes in current are associated with induced voltage and changes in stored magnetic energy. This application makes the helical coil useful for studying how circuit behavior reflects field-based energy storage rather than treating current as an isolated electrical quantity.
The same component can act as an antenna element, an electromagnetic actuator, or a spring, depending on the physical effect being used. As an antenna element, its form supports an electromagnetic application; as an actuator, magnetic effects produce motion or force; and as a spring, elastic behavior supports mechanical design and testing.