ultrasonic absorption
41Animal echolocation — Echolocation, also called biosonar, is the biological sonar used by several animals such as dolphins, shrews, most bats, and most whales. The term was coined by Donald Griffin, who was the first to conclusively demonstrate its existence in bats.… …
42Plastic welding — is the process of welding plastic parts together. There are several techniques:Hot gas weldingThis is a plastic welding technique which is analogous to gas welding of metals, though the specific techniques are different. A specially designed heat …
43Microwave burn — This article is about injury from direct microwave exposure. For other microwave oven related injuries, see Hazard section of Microwave oven. Microwave burns are burn injuries caused by thermal effects of microwave radiation absorbed in a living… …
44CANDU reactor — The CANDU reactor is a Canadian invented, pressurized heavy water reactor developed initially in the late 1950s and 1960s by a partnership between Atomic Energy of Canada Limited (AECL), the Hydro Electric Power Commission of Ontario (now known… …
45Loudspeaker — For other uses, see Loudspeaker (disambiguation). An inexpensive, low fidelity 3½ inch speaker, typically found in small radios …
46Adamantane — Adamantane …
47Diamond enhancement — Diamond enhancements are specific treatments, performed on natural diamonds (usually those already cut and polished into gems), which are designed to improve the gemological characteristics and therefore the value of the stone in one or more ways …
48Nerve guidance conduit — A nerve guidance conduit (also referred to as an artificial nerve conduit or artificial nerve graft, as opposed to an autograft) is an artificial means of guiding axonal regrowth to facilitate nerve regeneration and is one of several clinical… …
49Karl Ferdinand Herzfeld — (* 24. Februar 1892 in Wien; † 3. Juni 1978 in Washington, D.C.) war ein Physiker. Herzfeld studierte in Wien, Zürich und Göttingen. An der Universität Wien wurde er 1914 bei Friedrich Hasenöhrl promoviert. Nachdem er fünf Jahre Privatdozent bei… …
50pregnancy — /preg neuhn see/, n., pl. pregnancies. the state, condition, or quality of being pregnant. [1520 30; PREGN(ANT) + ANCY] * * * Process of human gestation that takes place in the female s body as a fetus develops, from fertilization to birth (see… …
