In simple words, an Oxygen Concentrator works on electricity; takes in room air, removes Nitrogen from it and provides upto 95% pure Oxygen. The composition of air (78% Nitrogen, 21% Oxygen and 1% other gases like Carbon Dioxide, Argon, etc.) clearly shows that air is mainly comprised of two gases: Nitrogen and Oxygen [together 99%].
Word Origin and History for savoir-faire Expand. n. instinctive knowledge of the right course of action in any circumstance, 1815, from French, literally to know (how) to do, from savoir to know (from Latin sapere; see sapient) + faire (from Latin facere; see factitious).
[taÊtiËflÉt]) is a French dish from the Savoie and Haute Savoie region of France. It is made with potatoes, reblochon cheese, lardons and onions.he format of this adheres to that of the original dish in everything but the use of potatoes, in place of which are found minuscule squares of locally produced pasta (crozets de Savoie (usually made from buckwheat but sometimes durum). The name of this dish is a portmanteau of crozet and tartiflette.