19-535: (Redirected from Et ) [REDACTED] Look up ET or et in Wiktionary, the free dictionary. ET or et may refer to: Arts, entertainment, and media [ edit ] E.T. the Extra-Terrestrial franchise [ edit ] E.T. the Extra-Terrestrial , a 1982 film E.T. the Extra-Terrestrial (video game) , a 1982 video game E.T.
38-462: A 2022 Indian film Music [ edit ] Electro Team , a eurodance band from Croatia "E.T." (song) , a 2011 song by Katy Perry from Teenage Dream "ET (Extra-Terrestrial)", a song by OutKast from ATLiens "E.T. Phone Home", a song by Jupiter 8 Featuring Kitty Woodson, co-authored by George Terry Publications [ edit ] Empire Times , an Australian student newspaper at Flinders University The Epoch Times ,
57-499: A chronic blood cancer Essential tremor , a neurological disorder characterized by shaking of hands and limbs Evapotranspiration , a sum of evaporation and plant transpiration Chemistry [ edit ] Electron transfer , the move of an electron from one atom or molecule to another Ethyl group , a functional group in organic chemistry Other uses in science and technology [ edit ] Electromagnetic testing Electron tomography Envelope tracking ,
76-659: A newspaper Economic Times (disambiguation) , several newspapers Codes [ edit ] ET, NYSE stock symbol for Energy Transfer Partners , American pipeline company et, the ISO 639 code for the Estonian language et, the ISO 3166-1 country code for Ethiopia .et , the country code top-level domain (ccTLD) for Ethiopia ET, IATA airline designator for Ethiopian Airlines Science and technology [ edit ] Biology and medicine [ edit ] ET tube , or endotracheal tube Essential thrombocythemia ,
95-639: A rating in the United States Navy Eastern Time Zone , a time zone in North America Et (Armenian letter) , a letter in the Armenian alphabet See also [ edit ] [REDACTED] Search for "et" on Misplaced Pages. Extraterrestrial (disambiguation) All pages with titles beginning with et All pages with titles beginning with ET All pages with titles containing ET Topics referred to by
114-521: A technique to provide a dynamic power supply to RF power amplifier Extraterrestrial life Köppen climate classification for tundra Space Shuttle external tank People [ edit ] Andrew Ettingshausen , rugby league footballer E Thi , Burmese fortune teller Eric Thomas (motivational speaker) Errol Thompson (audio engineer) , dub producer Other uses [ edit ] Ampersand punctuation mark (&), originally derived from Latin et Electronics Technician ,
133-440: Is an extension of traditional transmission electron microscopy and uses a transmission electron microscope to collect the data. In the process, a beam of electrons is passed through the sample at incremental degrees of rotation around the center of the target sample. This information is collected and used to assemble a three-dimensional image of the target. For biological applications, the typical resolution of ET systems are in
152-466: Is different from Wikidata All article disambiguation pages All disambiguation pages ET">ET The requested page title contains unsupported characters : ">". Return to Main Page . Electron tomography Electron tomography (ET) is a tomography technique for obtaining detailed 3D structures of sub-cellular , macro-molecular , or materials specimens. Electron tomography
171-598: Is relevant to the physical sciences, where cryo-EM techniques cannot always be used to locate the coordinates of individual atoms in disordered materials. AET reconstructions are achieved using the combination of an ADF-STEM tomographic tilt series and iterative algorithms for reconstruction . Currently, algorithms such as the real-space algebraic reconstruction technique (ART) and the fast Fourier transform equal slope tomography (EST) are used to address issues such as image noise, sample drift, and limited data. ADF-STEM tomography has recently been used to directly visualize
190-401: The 5–20 nm range, suitable for examining supra-molecular multi-protein structures, although not the secondary and tertiary structure of an individual protein or polypeptide . Recently, atomic resolution in 3D electron tomography reconstructions has been demonstrated. In the field of biology, bright-field transmission electron microscopy (BF-TEM) and high-resolution TEM ( HRTEM ) are
209-445: The Extra-Terrestrial (soundtrack) , a soundtrack score album by John Williams E.T. the Extra-Terrestrial (album) , an audiobook album by Michael Jackson and the original cast E.T. (character) , the titular alien from the film Other film and TV [ edit ] Eastern Television , a Taiwanese television network Entertainment Tonight , an American television entertainment news show Etharkkum Thunindhavan ,
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#1732844628014228-460: The atomic structure of screw dislocations in nanoparticles. AET has also been used to find the 3D coordinates of 3,769 atoms in a tungsten needle with 19 pm precision and 20,000 atoms in a multiply twinned palladium nanoparticle. The combination of AET with electron energy loss spectroscopy (EELS) allows for investigation of electronic states in addition to 3D reconstruction. Challenges to atomic level resolution from electron tomography include
247-447: The contrast transfer function of BF-TEM is essentially a high-pass filter – information at low spatial frequencies is significantly suppressed – resulting in an exaggeration of sharp features. However, the technique of annular dark-field scanning transmission electron microscopy (ADF-STEM), which is typically used on material specimens, more effectively suppresses phase and diffraction contrast, providing image intensities that vary with
266-413: The need for better reconstruction algorithms and increased precision of tilt angle required to image defects in non-crystalline samples. The most popular tilting methods are the single-axis and the dual-axis tilting methods. The geometry of most specimen holders and electron microscopes normally precludes tilting the specimen through a full 180° range, which can lead to artifacts in the 3D reconstruction of
285-577: The primary imaging methods for tomography tilt series acquisition. However, there are two issues associated with BF-TEM and HRTEM. First, acquiring an interpretable 3-D tomogram requires that the projected image intensities vary monotonically with material thickness. This condition is difficult to guarantee in BF/HRTEM, where image intensities are dominated by phase-contrast with the potential for multiple contrast reversals with thickness, making it difficult to distinguish voids from high-density inclusions. Second,
304-430: The projected mass-thickness of samples up to micrometres thick for materials with low atomic number . ADF-STEM also acts as a low-pass filter , eliminating the edge-enhancing artifacts common in BF/HRTEM. Thus, provided that the features can be resolved, ADF-STEM tomography can yield a reliable reconstruction of the underlying specimen which is extremely important for its application in materials science . For 3D imaging,
323-485: The resolution is traditionally described by the Crowther criterion . In 2010, a 3D resolution of 0.5±0.1×0.5±0.1×0.7±0.2 nm was achieved with a single-axis ADF-STEM tomography. Atomic level resolution in 3D electron tomography reconstructions has been demonstrated. Reconstructions of crystal defects such as stacking faults , grain boundaries , dislocations , and twinning in structures have been achieved. This method
342-401: The same term [REDACTED] This disambiguation page lists articles associated with the title ET . If an internal link led you here, you may wish to change the link to point directly to the intended article. Retrieved from " https://en.wikipedia.org/w/index.php?title=ET&oldid=1242174113 " Category : Disambiguation pages Hidden categories: Short description
361-460: The target. Standard single-tilt sample holders have a limited rotation of ±80°, leading to a missing wedge in the reconstruction. A solution is to use needle shaped-samples to allow for full rotation. By using dual-axis tilting, the reconstruction artifacts are reduced by a factor of 2 {\displaystyle {\sqrt {2}}} compared to single-axis tilting. However, twice as many images need to be taken. Another method of obtaining
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