In the Hornbostel-Sachs classification system, it is a membranophone. Drums consist of at least one membrane, called a drumhead or drum skin, that is stretched over a shell and struck, either directly with the player's hands, or with a drum stick, to produce sound.
Heat production can be calculated from a measurement of VO 2 and/or CO 2. Doubly-Labeled Water Doubly-labeled water contains isotopes of oxygen and of hydrogen. The technique involves the consumption by the patient of the doubly-labeled water then the measurement of the amount of isotope in the person after a washout period of 7- 14 days. Most of the hydrogen and oxygen isotopes are lost through excretion and evaporation, but some of the oxygen isotope equilibrates with carbon dioxide and is expired in air.
Non-Sterile Graduated Plastic Medicine Cups. 1  Translucent plastic cups suitable for dispensing both liquid and dry medications. 2  DYND70000 has graduated markings in ml only. 3  DYND80000 is calibrated from 1-8 drams, 1/8-1 fluid ounce, 1-2 tablespoon and 2.5-30 ml and cc.  DYND90000 comes with ml and cc measurements only.