The medical word for impotence is Erectile Dysfunction (ED). It is the inability to achieve or maintain an erection. Erectile dysfunction is common throughout the world and the stigma placed behind it has led men to keep mum about it. This is because the ability to perform sexually is the tool at which intimacy is judged in many communities. Impotence or erectile dysfunction is a great threat to the whole aspect of manhood. In many circles, it is an issue that determines whether or not you are a man. It usually goes like this - if you can not charge, what are you for? It is however important to note that men with erectile dysfunction often retain other sexual functions, such as sexual desire and the ability to have orgasms and ejaculate.

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The substance used for Electron Emission is known as an Emitter.An Emitter should have the following Properties.

01)High Melting Point:-

As Electron Emission takes place at very High Temperatures,therefore,the substance used as Emitter should have High Melting Point.

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There very many people with the problem of bad breath, gum problems and tooth decay. Dental decay and a gum disease called gingivitis are today the most prevalent diseases in man. Immediately after birth, the mouth contains many kinds of bacteria. A few of these bacteria are harmful to man. The harmful bacteria will constantly keep on forming a sticky film called plaque on the teeth and gums. When we eat sugary food, the sugar combine with plaque and plaque becomes even more harmful. Plaque is also harmful by itself if allowed to remain on the teeth for more than a day. When sugar is taken into the mouth in the form of either food or drink, it is immediately absorbed by saliva, which then attaches itself to the sticky film of plaque.

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An Electronic Device,in which the flow of Electrons is through a Vaccum is known as Vaccum Tube.

A Vaccum Tube usually contains a Cathode which is called as Electron Emitter,an Anode which is called as plate (which is electron Collector) and one or more Electrodes called as Grids,for controlling the flow of Electrons between the Cathode and Anode.

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The Vacuum Tubes will always give satisfactory performance in a Circuit if they are operated under proper condition.Actually this is the basic requirement
of any Electronics Devices or Circuit.We have to take due care about the requirement of such Devices.Any deviation may result in the damage of the Vacuum Tube.The Vacuum Tube Manufacturers publish manuals indicating the limitations in the Operating Conditions.

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