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Sentricon bait stations are installed in the soil, creating a protective perimeter around a property. These stations are baited with a cellulose material impregnated with noviflumuron, [6] a chitin synthesis inhibitor. When foraging, worker termites find the stations, eat the bait material, and then regurgitate it for colony nest mates to consume.
Measuring hydraulic head in an artesian aquifer, where the water level is above the ground surface. Hydraulic head or piezometric head is a specific measurement of liquid pressure above a vertical datum. [1] [2] It is usually measured as a liquid surface elevation, expressed in units of length, at the entrance (or bottom) of a piezometer.
These heads have a dish with a fixed radius (r1), the size of which depends on the type of torispherical head. [3] The transition between the cylinder and the dish is called the knuckle. The knuckle has a toroidal shape. The most common types of torispherical heads are:
Suction line (#3) is an intake line for the mud pump to draw drilling fluid from the mud tanks. Swivel (#18) is the top end of the kelly that allows the rotation of the drill string without twisting the block. Traveling block (#11) is the moving end of the block and tackle. Together, they give a significant mechanical advantage for lifting.
Pressure head is a component of hydraulic head, in which it is combined with elevation head. When considering dynamic (flowing) systems, there is a third term needed: velocity head. Thus, the three terms of velocity head, elevation head, and pressure head appear in the head equation derived from the Bernoulli equation for incompressible fluids:
The continuous stirred-tank reactor (CSTR), also known as vat-or backmix reactor, mixed flow reactor (MFR), or a continuous-flow stirred-tank reactor (CFSTR), is a common model for a chemical reactor in chemical engineering and environmental engineering. A CSTR often refers to a model used to estimate the key unit operation variables when using ...
The Soviets introduced this system for their KV-13 experimental tank, and this led to its use in the IS tank family. Later versions introduced more gears to produce multiple turning radii, including reversing one track. The T-64 introduced a new model with seven speeds, and this basic system has been used on the T-72, T-90 and Chinese Type 98 ...
One common change is to use two sets of holes, each designed specifically to be efficient at capturing or releasing the gas. In this case the forward set of holes is similar to the single-hole example, but a second rearward set of holes is added, using check valves (typically ball bearings in a pit) to allow the high-pressure gases in, but not ...