Electrochemical reactions are heterogeneous chemical reactions that occur through the transfer of charge across the interface between an electrode and an electrolyte. The basic design of any electrolytic cell is the same and requires a complete electrical circuit including: electrodes (an anode and a cathode); ionic contact via an electrolyte between the electrodes; and electrical contact via an external electrical circuit between the electrodes.

Though much of what causes RA still remains a mystery, what we know is that RA occurs when the immune system attacks the body's joints. According to recent research, B-cells—a type of white blood cell found in the immune system—are believed to play an important role in causing this attack. The goal of targeted B-cell therapy is to target B-cells and selectively reduce them in the body. See similar questions...

The term Photovoltaic is derived from the Greek word for light 'photos' and 'volt' which is the term for electromotive force. PV cells convert solar energy from the sun into electricity through semi-conductor cells. A PV cell is made up of two thin layers of dissimilar semiconducting materials, usually made from silicon which have been treated with small amounts of substances giving the cell the means to produce electricity. The cell is made from two layers. See similar questions...

A fuel cell is a device that converts the chemical energy of a fuel (hydrogen, natural gas, methanol, gasoline, etc.) and an oxidant (air or oxygen) into electricity. In principle, a fuel cell operates like a battery. Unlike a battery, however, a fuel cell does not run down or require recharging. It will produce electricity and heat as long as fuel and oxidizer are supplied. See similar questions...

A cell phone is a special type of phone that is not connected to your telephone in the house and works both inside and away from your house. For example, you can use a cell phone to make and receive calls in your car, at the park, at the mall, or even at the beach. A cell phone turns your voice into a special type of electricity and sends it over the air to a nearby cell tower; the tower sends your voice to the person you are calling. See similar questions...

Depending upon your phone and system, cell phones MAY work in some places and not in others. A cell phone is not a dependable emergency contact for all situations. CT users should always leave their plans, routes and timeline with someone. Satellite phones can provide more reliable phone service. See similar questions...

A cellular phone can be extremely helpful in the event of an emergency but cannot be relied upon. Communication is available only on some segments of the trails and only at some of the huts. From our experience, reception can vary, depending on location and quality of the phone. We ask that you keep the phone in the bottom of your pack, and that you respect others by not using it inside the hut. Most people go to the huts to get away from phones! See similar questions...

Our radios utilize a Gallium Arsenide Metal Semiconductor Field Effect Transistor (GaAs MES-FET). Gallium is a byproduct of smelting metals, chiefly aluminum and zinc, and is actually rarer than gold. Gallium Arsenide is a superior alternative to Silicon for producing solid state chips. This transistor is better at handling multiple strong signals than integrated circuits or bipolar transistors (used in most other radios). The Model One was the first radio to use this technology in an FM tuner. See similar questions...

Simply remove the rechargeable battery and transformer and replace them with two C-cell batteries and a converter. See similar questions...

Yes. When donated phones go through the reprogramming process, minor repairs can be made. Depending on the nature of the defect, there still is a chance that it can be repaired and converted into a 911 emergency phone. See similar questions...

Unlike conventional electrolytic nickel, no electrical current is required for deposition of Electroless Nickel. The electroless bath provides a deposit that follows all contours of the substrate exactly, without building up at the edges and corners. A sharp edge receives the same thickness of deposit as does an internal diameter. See similar questions...

For all wireless service providers you can initiate an activity while in coverage and your route will be tracked except for any gaps in coverage. We can not record during these gaps, but your overall activity will be preserved if you come back into coverage prior to stopping Training Log. Some phones can even record while outside of cell coverage. Click here to see if your wireless carrier/phone model will record while outside of cell coverage. See similar questions...

Pictavision requires a data service enabled phone to operate, and also requires a color phone. Click here for a current list of data service enabled phones. See similar questions...

Natural killer (NK) cells are critical components of immune system function. Research shows that low NK cell activity is present in nearly all illnesses. NK cells defend the body against attack by foreign invaders. NK cells are non-specific, meaning they attack any target including bacteria, tumor or virally infected cells. The NK's ability to randomly attack a wide range of foreign invaders is the basis of the name "natural killer" cell. See similar questions...

of March 2007, there are 21 independent, fully developed stem cell lines available for widespread distribution to researchers. Providers of these 21 cell lines all received an NIH Infrastructure award. This number compares to 17 in 2004 and 1 in April 2002. The increased availability of the lines is a direct consequence of NIH's funding of Infrastructure awards to support cell providers to develop their eligible lines into distribution-quality, well-characterized cell lines. See similar questions...

ANY CONDITION! We accept iPods, Cell Phones, iPhones, and Game Consoles NEW, USED, BROKEN, Old and Damaged. We will accept your Dead, Water Damaged, Weird, Smashed, Burned, Cracked, LCD Damaged, Hard Drive Broken, Sad Face, Folder Icon, Ports Damaged, USB Plug Broken, No Sound, No Picture, Old or Depleted Battery, Opened, or any other type of damage or combination of damage possible. Also, if you have no idea what is wrong with your electronic device, we will take that too. See similar questions...

Most new hearing aids contain RF immune circuitry and about half contain a telecoil. These digital hearing aids are designed to be usable with wireless devices with lower RF emissions and magnetic coupling ability. Your hearing healthcare professional will be able to tell you if your hearing aid is immune to RF interference and may need to contact the manufacturer of your hearing aid to determine its immunity rating. See similar questions...