C-type motors

For C-type motors, additional information about the C-terminal residues following helix a6 is given in parentheses. 

Fig. 1. Domain structures of typical members of the kinesin superfamily. (A) Bar diagram of the kinesin heavy chain (KHC) of conventional kinesin (kinesin-1 family) as a typical representative of N-type motors (motor domain at the N-terminus, red) the cartoon model beneath the bar diagram shows the tetrameric complex of two heavy and two light chains. (B) M-type kinesin like MCAK of the kinesin-13 family. (C) C-type kinesin like Ned of the kinesin-14 family.

C-type kinesins have a class-specific neck at the N-terminal side of their motor domain. In the case of DmNcd, the neck forms a continuous a-helix with the less conserved stalk. Constructs of the motor domain with a sufficiently long part of the neck dimerize by formation of a coiled-coil. 

To date, approximately 10 different kinesin subfamilies have been identified. All contain a globular head (motor) domain, but they differ in their tail domains and several other properties. In most kinesins, the motor domain is at the N-termlnus (N-type) of the heavy chain but, in others, the motor domain is centrally located (M-type) or at the C-terminus (C-type). Both N- and M-type kinesins are (+) end-directed motors, whereas C-type kinesins are (—) end directed motors. Although most kinesins have two heavy chains (e.g., kinesin I), others have a single heavy chain (e.g.,... 

Two types of rocket motor propellants were used, namely a composite (C) and a doublebase (DB) type. The C-type propellants consisted of heterogeneous grains where the fuel and oxidiser were held together in a synthetic rubber matrix. The DB-types had homogeneous grains containing small amoimts of dispersed additives. There were 12 C-type and 6 DB-type rocket motor propellants. 

If a special-flammable storage cabinet ventilation system is installed, it should employ an AMCA-C type spark-resistant fan and an explosion-proof motor. Most fractional horsepower fans commonly used for this purpose do not meet this criterion and should not be used. If the building has a common fume hood exhaust system, then it is appropriate to hook a flammable-storage cabinet up to it if it must be ventilated. 

In this type of system the a.c. electric motor is first disconnected from its supply and a d.c. current injected into its windings for sufficiently long to stop the motor. The circuit diagram in Fig. 13. 25 shows the basic features of this type of system. Pressing the start button energises relay R and closes the direct-on-line starter contacts to supply three-phase power to the induction motor, which will then accelerate to its working speed. The starter is held on via contacts Rl. 

Fig. 23(C) shows a reflux assembly with a stirrer fitted. The stirrer A is both held in position in the tube B and allowed to rotate freely by the lubricated rubber sleeve C, as described on p. 39, and is connected to a vertical motor above. The extent to which the stirrer dips into the liquid in the flask can readily be adjusted. The condenser (not shown) is fitted into D. This constitutes for many purposes the best type of stirrer. If desired, the rubber sleeve C can be replaced by a metal fitting E for a horizontal drive. The gas-inlet F is closed when not in use.

Power Take-Off From Engine or Transmission. This type of system is limited to tmcks and there are several take-off means available. Most are some form of electric power generation equipment, belt-driven from the engine crankshaft, which produces either a regulated a-c voltage or rectified direct current for the compressor and fan motors in the body. 

The Nametre Rotary B rotational viscometer measures torque in terms of the current needed to drive the d-c motor at a given speed while a material is under test. The standard sensors are coaxial cylinders or Brookfield disk-type spindles, but a cone—plate system is also available. The viscosity range for the coaxial cylinder sensors is 5 to 5 x 1(T mPa-s, and the maximum shear rate is 200. ... 

A subsequent study of construction features of motors for Zone 2 locations, resulted in the development of nonsparking, type n motors. The basic design consideration for such motors is similar to that of type e motors but now there is no restriction in the limiting temperature, by 10°C, as in type e motors. Frame sizes for these motors are generally the same as for general-purpose motors. Thus they tend to be smaller and less expensive than type e motors for the same output. 

Special provisions are laid down in lEC 60079-0 and lEC 60079-1 for motors required for such locations in view of fluctuating degrees of humidity and temperature. Such locations are defined with a surface temperature limit of 150°C where coal dust can form a layer, or 450°C where it is not expected to form a layer. Otherwise, other details are generally the same as for flameproof motors type Ex d , according to lEC 60079-1. For variations in length of paths, gaps, widths, creepage and clearance distances, the reader should consult these Standards. 

NEMA standards do not give any fixed maximum operating temperature by any class of insulation. Briefly, NEMA states that insulation of a given class is a system that can be shown to have suitable thermal endurance when operated at the temperature rise shown in the standard.s for that type of machine. Standards for synchronous motors and indue tioii motors with a 100% service factor specify 80°C rise by resistance... 

Elevators of this type are of a configuration similar to the geared drive systems mentioned above. The difference lies in the increase in the physical size of the drive as the required operating torque of a gearless d.c. motor is produced at a fraction of the rpm of a geared a.c. motor. 

The results of the studies.discussed in Section II,C permit calculations to be made of the time required for the flame to spread to the entire propellant surface. Once this phase of the motor-ignition process has been completed, the time required to fill the combustion chamber and establish the steady-state operating conditions must be computed. This can be done by the formal solution of Eq. (7). Because this equation is a Bernoulli type of nonlinear equation, the formal solution becomes... 

Zhao, C., Takita, J., Tanaka, Y. et al. Charcot-Marie-Tooth disease type 2A caused by mutation in a microtubule motor KIF1B 3. Cell 105 587-597, 2001. 

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