Q:What is the difference between voltage clamp and patch clamp?

Voltage clamp technology is to inject a certain amount of current into the cell to counteract the ion flow produced by the opening of the ion channel, and then fix the cell membrane potential at a certain value.

Q:Voltage clamp principle and operation

The design principle is that the transmembrane ion current (I) is formed when the ion moves across the membrane. The permeability is the degree of resistance of the ion passing through the membrane, and the reciprocal of the membrane resistance (R), that is, the membrane conductance (G). As a result, the membrane resistance becomes smaller when the membrane permeability increases, i.e., the conductance of the membrane to the ion increases. According to Ohm's law V=IR, namely I=V/R=VG, so, as long as the fixed on both sides of the membrane potential difference (V), transmembrane current measured (I) changes, can be used as a measure of membrane conductance changes, changes of membrane permeability can be understood.

Q:Where is the flat pliers used?

Use: bend sheet metal and metal wire into desired shape.

Q:What's the keel pliers?

The keel clamp is in a horizontal and vertical keel making pliers

Q:The hydraulic pliers can cut the U lock it

In fact, whether or not cut, or look at the gap between the hardness of the material, that is to say, if you want to cut the U lock, the lock must look at the material, if the material is better, also on the hydraulic shear of the higher requirements, I believe you can understand.

Q:How does the elevator use the safety rope to trigger the action of the safety tongs?

Safety rope is such a device: it is an auxiliary rope which is guided by the steering wheel of the engine room (pulley). One endThe car is fixed on the car and the other end is fixed on the counterweight clamp rod. When the suspension steel rope is broken, the car and counterweight are brokenDon't fall down, although the counterweight does not have its own speed limiter, the action can be triggered by a falling car. securityThe requirements and specifications of the rope are the same as that of the speed limiter steel cable.Taking into account that when the elevator rated speed is higher, if the car fell down, affecting the safety rope and trigger the counterweight to the securityThe impact of the rope will be great and may cause damage to the safety rope. Therefore, the safety rope can be used to trigger the counterweightAt rated speed not exceeding 1m/s.Caution: the safety rope is not permitted to trigger the car safety tongs under any circumstances.

Q:What are the main safety guards for elevators?

Emergency door。 In order to prevent the head, hands and feet from sticking out of the hoistway and objects, the safety door should be installed at the entrance and exit of the passenger compartment. In public places, families and dormitory to use the elevator inflammable and explosive places, the vertical door should be closed, the car should be manmen, wells (Hall) of not less than 1.8 meters high;

Q:What are the principles and the methods of use of pliers?

Working principle of tongsThe tongs mainly use the lever principle and belong to the manual tools of lever force increasing. The key of the work is that when the angle of a set of mandril is big, the force can be gained several times from the decomposition of force. Compared with other manual tools which use lever principle, the application principle of lever is applied two times, so it is more labor-saving.

Q:What's the name of the pipe on the pliers table?

Named pipe [material] drop forged or cast steel. [introduction] pipe fitting is used to connect the fastening or loosening tool. The utility model comprises a clamp handle and a chain hinged at one end with the clamp handle, and the front end of the pliers handle is provided with teeth which are meshed with the chain.

Q:What about the location of the car brake tongs?

Manufacturers are used to different things. No matter what way the brake clamps are fixed, the torque is transmitted to the front and rear axles, which are then dispersed into the car body. It's the same for all civilian cars.Run the brake caliper layout will pay attention to, normally the front brake rear, rear brake front, is based on the air driving design, running because of the air force, ventilation, the front tire rear rear tire in front of the larger, in order to increase the amount of ventilation, ensure the brake caliper and brake cooling effect the manufacturer and the appropriate point to place the brake caliper by pneumatic test selection.You can search the car for the wind tunnel test, and there are some lines that will test the spoiler.There are even some car will be in the form of two rear wheel caliper before and after the use of the handbrake and brake calipers apart, just as Audi is R8.