general

A breathing gas is a mixture of gaseous chemical elements and compounds used for respiration. Air is the most common, and only natural, breathing gas - but a range of pure gases or mixtures of gases are used in breathing equipment and enclosed habitats such as scuba equipment, surface supplied diving equipment, recompression chambers, submarines, space suits, spacecraft, medical life support and first aid equipment, high-altitude mountaineering and anaesthetic machines. Oxygen is the essential component for...

Read more about basic principles of gas exchange in the Boundless open textbook.

Speak Japanese in 90 Days: A Self Study Guide to Becoming Fluent: Volume One - Kindle edition by Kevin Marx. Download it once and read it on your Kindle device, PC, phones or tablets. Use features like bookmarks, note taking and highlighting while reading Speak Japanese in 90 Days: A Self Study Guide to Becoming Fluent: Volume One.

Explore and interact with an IKEA Kitchen in Virtual Reality! Walk around freely, open drawers and put your vegetable peelings in the waste sorting station. You can even enjoy the visual impact of different material finishes and experience things from a child’s point of view.