vacuum technique
51техника высокого вакуума — didelio vakuumo technika statusas T sritis fizika atitikmenys: angl. high vacuum technique vok. Hochvakuumtechnik, f rus. техника высокого вакуума, f pranc. technique de vide élevé, f; technique de vide poussé, f …
52Dushman, Saul — ▪ American chemist born July 12, 1883, Rostov, Russia died July 7, 1954, Scotia, N.Y., U.S. Russian American physical chemist, author of several standard scientific textbooks. Dushman immigrated to America in 1891, later entering the… …
53Thomson, Sir J.J. — ▪ British physicist Introduction in full Sir Joseph John Thomson born Dec. 18, 1856, Cheetham Hill, near Manchester, Eng. died Aug. 30, 1940, Cambridge, Cambridgeshire English physicist who helped revolutionize the knowledge of atomic… …
54electron microscopy — Technique that allows examination of samples too small to be seen with a light microscope. Electron beams have much smaller wavelengths than visible light and hence higher resolving power. To make them more observable, samples may be coated with… …
55shadow-casting — Vacuum evaporation and deposition of a film of carbon or metals such as palladium, platinum, or chromium on a contoured microscopic object in order to allow the object to be seen in relief with the …
56mass spectrometry — or mass spectroscopy Analytic technique by which chemical substances are identified by sorting gaseous ions by mass using electric and magnetic fields. A mass spectrometer uses electrical means to detect the sorted ions, while a mass spectrograph …
57Environmental scanning electron microscope — Wool fibers imaged in an ESEM by the use of two symmetrical plastic scintillating backscattered electron detectors …
58Mathematics and Physical Sciences — ▪ 2003 Introduction Mathematics Mathematics in 2002 was marked by two discoveries in number theory. The first may have practical implications; the second satisfied a 150 year old curiosity. Computer scientist Manindra Agrawal of the… …
59Transmission electron microscopy — A TEM image of the polio virus. The polio virus is 30 nm in size.[1] Transmission electron microscopy (TEM) is a microscopy technique whereby a beam of electrons is transmitted through an ultra thin specimen, interacting with the specimen as it… …
60Negative-pressure wound therapy — Application of a vacuum pump using a foam dressing to a wound Negative pressure wound therapy (NPWT) is a therapeutic technique using a vacuum dressing to promote healing in acute or chronic wounds and enhance healing of first and second degree… …
