Search results
Results From The WOW.Com Content Network
A Tesla valve, called a valvular conduit by its inventor, is a fixed-geometry passive check valve. It allows a fluid to flow preferentially in one direction, without moving parts. The device is named after Nikola Tesla, who was awarded U.S. patent 1,329,559 in 1920 for its invention. The patent application describes the invention as follows: [1]
A check valve, non-return valve, reflux valve, retention valve, foot valve, or one-way valve is a valve that normally allows fluid (liquid or gas) to flow through it in only one direction. [1] Check valves are two-port valves, meaning they have two openings in the body, one for fluid to enter and the other for fluid to leave. There are various ...
Heisenberg's microscope is a thought experiment proposed by Werner Heisenberg that has served as the nucleus of some commonly held ideas about quantum mechanics. In particular, it provides an argument for the uncertainty principle on the basis of the principles of classical optics .
When a valve with a volumetric flow rate Q is closed, an excess pressure ΔP is created upstream of the valve, whose value is given by the Joukowsky equation: =. In this expression: [31] ΔP is the overpressurization in Pa; Q is the volumetric flow in m 3 /s; Z is the hydraulic impedance, expressed in kg/m 4 /s.
The useful distance of the specimen from the PLA1 is a function of accelerating voltage, beam current, nature and pressure of gas, and of the aperture diameter used. [ 29 ] [ 33 ] This distance varies from around 10 mm to a fraction of a millimeter as the gas pressure may vary from low vacuum to one atmosphere.
The main components of a scanning tunneling microscope are the scanning tip, piezoelectrically controlled height (z axis) and lateral (x and y axes) scanner, and coarse sample-to-tip approach mechanism. The microscope is controlled by dedicated electronics and a computer. The system is supported on a vibration isolation system. [5]
The stopped-flow also sends a ‘start signal’ to the detector called the trigger so the reaction can be observed. The timing of the trigger is usually software controlled so the user can trigger at the same time the flow stops or a few milliseconds before the stop to check the stationary state has been reached.
However, the TAP tag method requires two successive steps of protein purification and consequently it can not readily detect transient protein–protein interactions. Recent genome-wide TAP experiments were performed by Krogan et al. and Gavin et al. providing updated protein interaction data for yeast organism. [8] [9]