Used for graphical user interface testing, Parasoft Selenic is an automated UI testing tool that creates native Selenium tests using the page object model. In addition to creating Selenium tests, Selenic provides self-healing capabilities for any Selenium tests by performing runtime analysis to avoid test failures issues during continuous testing. After test execution is complete, Selenic uses artificial intelligence to provide automated recommendations to fix broken tests, and when the user selects a fix, Selenic fixes those Selenium test scripts automatically. Selenic was released in October 2019.
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However, using chlorine or bromine as the oxidising agent also produces hydrochloric or hydrobromic acid as a side-product, which needs to be removed from the solution since they can reduce the selenic acid to selenous acid. Another method of preparing selenic acid is by the oxidation of elemental selenium in a water suspension by chlorine: :Se + 4 + 3 → + 6 HCl To obtain the anhydrous acid as a crystalline solid, the resulting solution is evaporated at temperatures below in a vacuum.Seppelt, K. “Selenoyl difluoride” Inorganic Syntheses, 1980, volume XX, pp. 36-38. . The report describes the synthesis of selenic acid.
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Selenous acid (or selenious acid) is the chemical compound with the formula H2SeO3. Structurally, it is more accurately described by (HO)2SeO. It is the principal oxoacid of selenium; the other being selenic acid.
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Selenoyl fluoride can be formed by the action of warm fluorosulfonic acid on barium selenateAdvanced Inorganic Chemistry A Comprehensive Text Cotton and Wilkinson or selenic acid. SeO3 \+ SeF4 can give this gas along with other oxyfluorides.
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Polonium's oxidation states are +2 and +4. alt=Water dripping into a glass, showing drops and bubbles. There are many acids containing chalcogens, including sulfuric acid, sulfurous acid, selenic acid, and telluric acid. All hydrogen chalcogenides are toxic except for water.
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Like sulfuric acid, selenic acid is a strong acid that is hygroscopic and extremely soluble in water. Concentrated solutions are viscous. Crystalline mono- and di-hydrates are known. The monohydrate melts at 26 °C, and the dihydrate melts at −51.7 °C.
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Selenic acid is the inorganic compound with the formula . It is an oxoacid of selenium, and its structure is more accurately described as . It is a colorless compound. Although it has few uses, its derivative sodium selenate is used in the production of glass and animal feeds.
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He graduated from Omro High School (Omro, Winnebago County). Mathews studied briefly at Ripon College in Ripon, Wisconsin, and then transferred to the University of Wisconsin. Mathews earned the B.S. in chemistry in 1903, writing a senior thesis on nitrosyl selenic acid, based on research under the supervision of Victor Lenher (1873–1927).
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In strongly acidic conditions, the hydrogen selenate ion, , is formed. It corresponds to the selenic acid, H2SeO4, which is a strong acid and can in its concentrated form dissolve gold. The element selenium exhibits several valence states. Selenate is the least reduced, followed by selenite, and elemental selenium; selenide is even more reduced than elemental selenium.
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The mechanism of oxidation of -CH2C(O)R group by SeO2 has been well investigated. The oxidation of carbonyl alpha methylene positions begins with attack by the enol tautomer at the electrophilic selenium center. Following rearrangement and loss of water, a second equivalent of water attacks the alpha position. Selenic acid is liberated in the final step to give the 1,2-dicarbonyl product.
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It is prepared by oxidising selenium compounds in lower oxidation states. One method involves the oxidation of selenium dioxide with hydrogen peroxide: : + → . Unlike the production sulfuric acid by hydration of sulfur trioxide, the hydration of selenium trioxide is an impractical method. Instead, selenic acid may also be prepared by the oxidation of selenous acid () with halogens, such as chlorine or bromine, or with potassium permanganate.
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Gold is unaffected by most acids. It does not react with hydrofluoric, hydrochloric, hydrobromic, hydriodic, sulfuric, or nitric acid. It does react with selenic acid, and is dissolved by aqua regia, a 1:3 mixture of nitric acid and hydrochloric acid. Nitric acid oxidizes the metal to +3 ions, but only in minute amounts, typically undetectable in the pure acid because of the chemical equilibrium of the reaction.
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All references to their selenic origin were phased out, with Honeymoon never demonstrating her magnetic talents, and Moon Maid identified solely as "Junior's wife". Both characters continued to appear sporadically, in greatly reduced roles, until her eventual demise. When Joe Staton and Mike Curtis took over the comic strip in 2011, they inaugurated a period in which many characters of the 1940s were reintroduced, including the Lunarian theme and the seeming reappearance of Moon Maid.
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Iron(II) selenate can be prepared by the reaction of saturated sodium selenate and iron(II) sulfate at 80 °C. When cooled to room temperature, crystalline iron(II) selenate precipitates from the solution.Filonenko, E. N.; Vergeichik, E. N.. Preparation and analysis of cobalt (II) selenate and iron (II) selenate. Farmatsiya (Moscow), 1998. 47 (3): 36-37 : Na2SeO4 (sat.) + FeSO4 → Na2SO4 \+ FeSeO4 The reaction of iron and selenic acid produces iron(II) selenate as well, but with a side product:A E H Tutton.
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Although the dance tradition has been known (especially in the U.S.) as "Aztec" or "Mexica," it is neither. The roots of the conchero dances (and thus the roots of the modern "Mexica" dances tradition is deeply rooted in the Chichimeca cultures of the north. The Otomi, Jonaz, Chichimeca, Caxcan, and other tribes never conquered by the Mexica, are the true roots of the Danza Conchera. Whereas the Mexi'ca rituals were based on solar concepts and values, the Chichimeca were rooted in selenic and stellar cosmology.
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In 1963 she was awarded an honorary degree by the Nicolaus Copernicus University in Toruń. Ripan worked in the domain of complex combinations and their use in analytical chemistry. She discovered and studied new classes of complex combinations used in the determination of metals, as well as new methods of assay for thallium, lead, tellurium, selenic acid, and selenocyanates. One of her students at the University of Cluj was Ionel Haiduc (a future President of the Romanian Academy), who wrote an undergraduate thesis on polyoxometalates under her direction in 1959.
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Prokić is one of the founders of Belgrade Circle (Beogradski krug) and of Forum of Writers (Forum pisaca). He is the author of the novel Alpha Foxtrot and of numerous theatre plays. His play Metastable Grail (Metastabilni Graal) is in the Anthology of Contemporary Serbian Drama. Other plays include: House of Bergmann, Fear for the Border, Homo Volans, Fathers and Forefathers (Dramatisation of Slobodan Selenic), In the Search of Marcel Proust, Dantes Divinus, The Russian Mission, The Last Days of Mankind (Adaptation of Karl Kraus), Le Petit et le Grand Theatre du Marquis de Sade, Edelheim, Finger Trigger Bullet Gun, Thankless Croatian Son (TV Script about A.G Matoš)... The last premieres of his plays were held in Halifax (James Dunn Theatre), Canada; London (LIFT Festival) and Birmingham (BE Festival), UK. Prokić directed the following pieces for the theater: Follie a Deux (Adaptation) by Heiner Mueller (Yugoslav Drama Theater), The Servants by Jean Genet (Bitef Theater), Helver's Night by Ingmar Villqist (Bitef Theater), Let's Talk About Life and Death by Krzysztof Byzio (Bitef Theater), The Unapproachable and Mercy Payable in Advance by Zanussi/Zebrowsky (Bitef Theater), Faraway by Tamara Bosak (Bitef Theater).
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