Both gases are harmless. Helium (He) is colorless, odorless and non-toxic, most known as the gas that is used for children's balloons so that they stay up in the air. Argon (Ar) is colorless, odorless and non-toxic, known as the gas used in air conditioning systems.

Helium and Argon and the other inert gases (and the other elements) are found in nature. They have been with us, in our universe, for billions of years. They are found in the stars. So I suppose their inventor would be God. Argon was discovered by William Ramsey and Rayleigh in an 1894 experiment in which they removed all of the oxygen and nitrogen from the air. Neon, Krypton and Xenon were discovered by William Ramsey and M. W. Travers when they were extracted from liquid air in 1898. See similar questions...

Helium is lighter than air, it is safe, non-poisonous, non-toxic and non-flammable. It is enviromentally friendly, but it should not be inhaled. You can read more facts about helium gas here. See similar questions...

Cryotherapy is a technique used for prostate cancer treatment that involves controlled freezing of the prostate gland.* See similar questions...

Both free weights and machines are beneficial. While the core of my workouts continue to be free weights, I also incorporate machine and cable work. If I could only choose one, I'd go with free weights. Back to index What I lift is relevant only to me, so I don't see any purpose in posting how much I lift. I'm not trying to stroke my ego or become involved in a "pissing match" with anyone. See similar questions...

No. Just use caution not to look directly into the laser's aperture. If you accidentally glance into the laser light, you will be fine; no harm will occur. Always follow directions and read warning stickers. See similar questions...

The Chiller eliminates the need for Helium headspace Carbon Dioxide tanks. The action of pumping heats up the liquid carbon dioxide causing the liquid carbon dioxide to flash in the pumping head to gas. This results in cavitations and low pump efficiency. Cavitation can be eliminated 2 ways: First, by use of a chiller assembly to cool the pump head and/or carbon dioxide fluid to about ?5 degrees Celsius, eliminating the cavitation problem. See similar questions...

Cryotherapy is an option for prostate cancer patients who want to avoid major surgery. Patients with smaller prostates are better candidates for treatment. Those with larger prostates can undergo therapy to decrease the prostate size prior to cryotherapy. See similar questions...

Presently, cryotherapy is recommended for patients who have localized prostate cancer or have recurrence of prostate cancer despite radiation. See similar questions...

Cryotherapy works by creating a cooling sensation that is transmitted through the nerve endings to the brain. It transmits at speeds faster than most pain sensations or warming sensations. Unlike icing an area, Biofreeze allows blood to continue to flow to the area so that it can be naturally repaired. See similar questions...

Several UNIX machines are available as the department's general use compute servers. For those in need of Solaris 9, please connect to blitz.cs.pitt.edu. For Red Hat Enterprise Linux, please connect to elements.cs.pitt.edu (or) linux.cs.pitt.edu. This will connect you to to one of the dual dual-core processor PCs ( Dell PowerEdge 1950s) in the elements cluster. There are also 2 computing labs available for your use. See similar questions...

Many machines are stored in this area. 6' X 6" skids are the basis for these shelters that comfortably house 2 machines each. There is also under cover storage between some of the sheds and those parts machines have an additional tarp over them for protection. In the gararge there are usually about 4 machines waiting for use and that same number waiting for some sort of attention. See similar questions...

All chemical elements can be found in several different states (phases). One of these phases is the gaseous phase. Apart from gaseous an element can also be solid or liquid. Water is called ice when it is solid, it is wet when it is liquid, and when it is gaseous it exists merely as gas or steam. When temperatures rise, the molecules of a substance part, causing the substance to become gaseous and less visible. This phase change causes air to be invisible. See similar questions...

Not if used sensibly. The only danger involved is if the cases are opened (thus the risk of an electric shock - as with every electical applicance) or if the casing of certain units are touched (they can get very hot and may burn you). The smoke which comes out of the smoke nozzle can also be very hot and often there are notices on the machine itself warning of this. See similar questions...

We often receive requests for an evidence base regarding the use of abbreviations. For example, we have been asked for controlled studies that show populations with a significantly lower incidence of patient harm where "dangerous" abbreviations are not used. There really isn't any research on this topic, just the reports we keep publishing and those that get national press. In fact we often cite a statement by Leape, Berwick, and Bates [JAMA, Volume 288(4). See similar questions...

Without special safety precautions, the laser can be dangerous. However, we ensure patient as well as health care worker safety by: 1. providing safety glasses for everyone in the room; 2. using the lowest effective settings possible; and 3. only allowing the doctor to perform the procedure as per the State Board of Medical Examiners. At the very low energy settings we use to treat spider veins, the danger is minimal. Treatment for vein problems have advanced dramatically over the past 5 years. See similar questions...