Ratings buckets

Fig. 11. (a) Diffeiential centrifugation (pelleting), where time 1 < time 2 < time 3 < time, (b) Rate 2onal separation in a swinging-bucket rotor, where tube 1 represents the density gradient solution, tube 2 the sample plus the gradient, and tube 3 the separation of sample particles under a centrifugal force, where... 

Bucket Elevators. In a bucket elevator, a series of buckets attached to an endless belt or chain are filled with material and lifted vertically to a head pulley or sprocket, where the material is dumped. The buckets are then returned back down to a tail pulley or sprocket at the bottom. Bucket elevators are not self-feeding. They must be fed at a controlled rate to avoid overfilling the buckets and damagiag the machinery. In the usual arrangement of a bucket elevator, the chain or belt path is vertical or steeply inclined ia a single plane. Special chain supported bucket systems that can travel ia two and three planes have been developed. 

USATHAMA) completed a trial burn of explosive, contaminated soil in a rotary kiln (Noland, 1984). Soil contaminated from red and pink water lagoons was successfully burned. A transportable rotary kiln yrstem was set up. The technology by Therm-All, Inc., had been used in industry for destruction of solid wastes. The normal screw feed system was not used, due to fear of a soil explosion during the extruded plug feed process. Therefore, the soil was placed in combustible buckets and individually fed by a ram into the incinerator. The feed rate was 300 to 400 Ib/hr and the operational temperature was 1200° to 1600°F in the kiln and 1600° to 2000°F in the secondary chamber. 

The flash vessel should be fitted with a float or inverted-bucket type steam trap to the condensate discharge line, and also a pressure relief valve to prevent excess pressure buildup, as may happen if the demand for LP steam drops below the flash steam production rate. 

NOTE All boiler plant operators are urged to meter the MU water consumption as an aid to calculating a material balance. Steam generation rates can be reasonably accurately determined from the fuel consumption because records of fuel costs are always maintained. Daily and weekly BD rates usually can be estimated from the use of a measuring bucket or pipe velocity table. The difference between steam production and MU represents a combination ofBD and loss of CR. 

Irradiations with this type of light source are carried out using a 1-1. Erlenmeyer flask as the reaction vessel instead of a l.S-1. beaker. The flask is placed in a cold-water bath that is supported on a magnetic stirrer. The bath can be made from a 10-qt. polyethylene bucket with a -in. hole bored about 1 in. from the top of the bucket and a piece of rubber tubing with a -in. bore and i-in. wall inserted as a drain. A stream of 24° tap water run into the bucket at flow rate of 51. per min. maintains the temperature of the reaction mixture below 33°. 

Ideally, the enzyme solution to be added to the reaction solution should be likewise thermally equilibrated prior to initiating the reaction. However, the thermal instability of many enzymes may require their storage in an ice bucket. An aliquot of the cold enzyme can then be brought up to temperature just prior to the initiation of the reaction. If the enzyme solution cannot be prewarmed, then care has to be exercised in the analysis of the experimental data. For example, assume that an enzyme had a temperature dependency (Qio) of two (i.e., for every 10°C change in temperature, there is a twofold change in reaction rate). Thus, if a 0.1 mL aliquot of enzyme at 0°C is added to a reaction mixture of 3.0 mL at 30°C, the reaction velocity may be perturbed by as much as 20%. In such cases, the initial velocity should only be measured after the ongoing reaction has reached thermal equilibration. 

For the gas-measuring device, the submitters used an inverted, calibrated 10-1. bottle, filled with saturated sodium chloride solution, resting in an enamel bucket big enough to hold the volume to be displaced. The checkers used a gas meter. However, the rate of gas evolution can be estimated by using a simple gas bubbler. 

KD. Flow rate is water volume per unit time, or the product of the volume of water per bucket and the number of buckets filled per unit time. Provided the wheel is operating at maximum torque, so that downward-travelling buckets are brim-full, the maximum Bucket capacity is approximately the total volume between the shrouds outside the hub divided by the number of blades, i.e., 0.25n(K2-l)LD2N i. This quantity divided by 2n gives the bucket capacity per radian of water wheel as 0.125(AC2-1)LD2, which multiplies by the angular velocity of to radians.s 1 to yield the water flow,... 

Finally, the steam turbine s buckets can foul with hardness deposits from the steam. This reduces the turbine efficiency, and may prevent a pump from running at its rated speed. Injecting steam condensate into the steam supply can remove such deposits. 

The problem described above is called cavitation. A pump that is operating in a cavitation mode may also (but often does not) produce a sound similar to shaking a bucket full of nuts and bolts. A cavitating motor-driven pump always draws an erratically low-amperage flow. This is consistent with the erratically low flow rate. 

Adjust the flow rate based on the volume to be purged, typically, 0.5 to 5 gallon per minute (gal/min). If the pumping rate is unknown, measure the evacuated volume in a graduated 5-gal bucket and monitor the time to establish the rate. 

The sample rate of the experiments ranged between 8 and 12 ms. The flow rates of the gas phase and liquid phase are set to desired values before each test is performed and then the flow rate is measured by pouring the mixture into a bucket for a certain period. The volumetric flow rate of the liquid phase is then calculated and recorded this is the actual flow rate Qa. Next, the UVP measurements are performed. 

M., A one-step separation of human serum high density lipoproteins 2 and 3 by rate-zonal density gradient ultracentrifugation in a swinging bucket rotor. J, Lipid Res. 23, 1342-1353 (1982). 

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