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Chemical element with atomic number 34 (Se)
Selenium is a chemical element; it has symbol Se and atomic number 34. It has various physical appearances, including a brick-red powder, a vitreous black
Selenium
Testing framework for web applications
Selenium is an open source umbrella project for a range of tools and libraries aimed at supporting browser automation. It provides a playback tool for
Selenium_(software)
Index of chemical compounds with the same name
Selenium fluoride may refer to: Selenium tetrafluoride (selenium(IV) fluoride), SeF4 Selenium hexafluoride (selenium(VI) fluoride), SeF6 Seleninyl fluoride
Selenium_fluoride
Index of chemical compounds with the same name
Selenium sulfide can refer to either of the following: Selenium disulfide, SeS2 Selenium hexasulfide, Se2S6 This set index article lists chemical compounds
Selenium_sulfide
Effect of chemical element
Selenium is an essential mineral micronutrient for animals, though it is toxic in large doses. In plants, it sometimes occurs in toxic amounts as forage
Selenium_in_biology
Group of chemical elements
oxygen family. Group 16 consists of the elements oxygen (O), sulfur (S), selenium (Se), tellurium (Te), and the radioactive elements polonium (Po) and livermorium
Chalcogen
Selenium has six natural isotopes that occur in significant quantities, along with the trace isotope 79Se, which occurs in minute quantities in uranium
Isotopes_of_selenium
Mixture of selenium sulfides
Selenium disulfide, also known as selenium sulfide, is a chemical compound and medication used to treat seborrheic dermatitis, dandruff, and pityriasis
Selenium_disulfide
Chemical compound
Selenium dioxide is the chemical compound with the formula SeO2. This colorless solid is one of the most frequently encountered compounds of selenium
Selenium_dioxide
Species of tree and its edible seeds
notable for diverse content of micronutrients, especially a high amount of selenium. The wood of the Brazil nut tree is prized for its quality in carpentry
Brazil_nut
Type of power rectifier
A selenium rectifier is a type of metal rectifier, invented in 1933. They were used in power supplies for electronic equipment and in high-current battery-charger
Selenium_rectifier
Index of chemical compounds with the same name
Selenium chloride may refer to the following chemical compounds: Selenium monochloride, Se2Cl2 Selenium dichloride, SeCl2 Selenium tetrachloride, SeCl4
Selenium_chloride
Medical condition
Selenium deficiency occurs when an organism lacks the required levels of selenium, a critical nutrient in many species. Deficiency, although relatively
Selenium_deficiency
Chemical reaction
The Riley oxidation is a selenium dioxide-mediated oxidation of methylene groups adjacent to carbonyls. It was first reported by Harry Lister Riley and
Riley_oxidation
Index of chemical compounds with the same name
Selenium oxide may refer to either of the following compounds: Selenium dioxide, SeO2 Selenium trioxide, SeO3 Diselenium pentoxide, Se2O5 This set index
Selenium_oxide
Selenium-enriched yeast extract sold as animal fodder additive
Selenium yeast is Saccharomyces cerevisiae (baker's yeast) grown in a selenium-rich media. It contains selenium in the form of organic and inorganic compounds
Selenium_yeast
Recoloration of black-and-white photographs
the range of shades visible in a print without reducing the contrast. Selenium toning is especially effective in this regard. Some toning processes can
Photographic_print_toning
Chemical compound
encountered hydride of selenium. H2Se is a colorless, flammable gas under standard conditions. It is the most toxic selenium compound with an exposure
Hydrogen_selenide
Chemical compound
Selenium oxydichloride is the inorganic compound with the formula SeOCl2. It is a colorless liquid. With a high dielectric constant (55) and high specific
Selenium_oxydichloride
Chemical compound
commonly available selenium chlorides, the other example being selenium monochloride, Se2Cl2. SeCl4 is used in the synthesis of other selenium compounds. The
Selenium_tetrachloride
Topics referred to by the same term
Selenium acid may refer to either of the following: Selenious acid, H2SeO3 Selenic acid, H2SeO4 Hydroselenic acid, H2Se This disambiguation page lists
Selenium_acid
Light-measuring instrument
A selenium meter is a light-measuring instrument based on the photoelectric properties of selenium. The most common use of such light meters is measuring
Selenium_meter
Chemical compound
is the most common water-soluble selenium compound. Sodium selenite usually is prepared by the reaction of selenium dioxide with sodium hydroxide: SeO2
Sodium_selenite
Chemical compound
Selenium tetrabromide is an inorganic compound with a chemical formula SeBr4. Selenium tetrabromide could be produced by mixing elemental bromine and selenium:
Selenium_tetrabromide
Chemical compound
Selenium dibromide is a compound made of one selenium and two bromine atoms. It is unstable. No solid form of the compound has been discovered but it
Selenium_dibromide
Chemical compound
Selenium dichloride is the inorganic compound with the formula SeCl2. It forms red-brown solutions in ethers. Selenium dichloride has been prepared by
Selenium_dichloride
Study of chemical compounds containing carbon-selenium bonds
organoselenium compounds, chemical compounds containing carbon-to-selenium chemical bonds. Selenium belongs with oxygen and sulfur to the group 16 elements or
Organoselenium_chemistry
Chemical compound
and one selenium atom. It is a selenium analog of furan (C4H4O) and thiophene (C4H4S). A colorless liquid, it is one of the more common selenium heterocycles
Selenophene
Chemical element with atomic number 52 (Te)
toxic, rare, silver-white metalloid. Tellurium is chemically related to selenium and sulfur, all three of which are chalcogens. It is occasionally found
Tellurium
Prostate cancer prevention trial
Selenium and Vitamin E Cancer Prevention Trial, or SELECT, was a clinical trial conducted with the goal of determining whether vitamin E and selenium
Selenium and Vitamin E Cancer Prevention Trial
Selenium_and_Vitamin_E_Cancer_Prevention_Trial
Chemical element with metallic and nonmetallic properties
tellurium. Five elements are less frequently so classified: carbon, aluminium, selenium, polonium and astatine. On a standard periodic table, all eleven elements
Metalloid
The selenium cycle is a biological cycle of selenium similar to the cycles of carbon, nitrogen, and sulfur. Within the cycle, there are organisms which
Selenium_cycle
Chemical compound
Selenium trioxide is the inorganic compound with the formula SeO3. It is white, hygroscopic solid. It is also an oxidizing agent and a Lewis acid. It is
Selenium_trioxide
Species of plant
and typically grows on selenium-rich soils. It accumulates selenium within its tissues, and when livestock consume it, the selenium can be toxic. Astragalus
Astragalus_bisulcatus
Long-lived radioisotope of selenium
Selenium-79 is a radioisotope of selenium present in spent nuclear fuel and the wastes resulting from reprocessing this fuel. It is one of only seven
Selenium-79
Chemical compound
Selenium tetrafluoride (SeF4) is an inorganic compound. It is a colourless liquid that reacts readily with water. It can be used as a fluorinating reagent
Selenium_tetrafluoride
Chemical compound
Selenium hexafluoride is the inorganic compound with the formula SeF6. It is a very toxic colourless gas described as having a "repulsive" odor. It is
Selenium_hexafluoride
Chemical compound
Selenium tetraazide is an inorganic chemical compound with the formula Se(N3)4. It is a highly sensitive explosive, and has been prepared directly from
Selenium_tetraazide
Lithium rechargeable battery
A sulfur selenium battery is a proposed alternative to lithium-ion batteries that in prototype has an energy density of 500 watt-hours/kg. It is approximately
Sulfur_selenium_battery
Chemical compounds containing selenium
Selenium compounds are compounds containing the element selenium (Se). Among these compounds, selenium has various oxidation states, the most common ones
Selenium_compounds
Selenium responsive proteins within human biology, are the class of proteins sensitive to selenium, in healthy human beings, in cancer patients, in in-vivo
Selenium_responsive_proteins
Tabular arrangement of the chemical elements
particular subshell fall into the same columns (e.g. oxygen, sulfur, and selenium are in the same column because they all have four electrons in the outermost
Periodic_table
Selenium-containing amino acid
residues. Selenocysteine is an analogue of the more common cysteine with selenium in place of the sulfur. Selenocysteine is present in several enzymes (for
Selenocysteine
Reservoir in Montana / British Columbia
Valley." The average selenium levels in Lake Koocanusa were 1 part per billion. Montana has established new standards for selenium—0.8 parts per billion
Lake_Koocanusa
Early type of semiconductor rectifier
semiconductor rectifier in which the semiconductor is copper oxide, germanium or selenium. They were used in power applications to convert alternating current to
Metal_rectifier
Chemical compound
compound with the formula Se(CH2CH2Cl)2. As a haloalkyl derivative of selenium, it is an analogue of bis(2-chloroethyl)sulfide, the prototypical sulfur
Bis(2-chloroethyl)selenide
Chemical compound
Selenium monochloride or diselenium dichloride is an inorganic compound with the formula Se2Cl2. Although a common name for the compound is selenium monochloride
Selenium_monochloride
Latin play by Titus Maccius Plautus
Plautus. The story, set in the Greek town of Sicyon, concerns a girl called Selenium who was exposed as a baby and brought up by a courtesan called Melaenis
Cistellaria
Tributary of the Colorado River in Colorado, United States
climbing. Contamination of the Gunnison River with selenium and mercury results from irrigation of high-selenium soils derived from the Mancos Shale and from
Gunnison_River
Chemical compound
a common ingredient in multivitamins and livestock feed as a source of selenium. The anhydrous salt is used in the production of some glass. Although the
Sodium_selenate
Medical condition
congestive cardiomyopathy caused by a combination of dietary deficiency of selenium and the presence of a mutated strain of Coxsackievirus, named after Keshan
Keshan_disease
Chemical element with atomic number 74 (W)
tungsten-requiring enzyme to be discovered also requires selenium, and in this case the tungsten-selenium pair may function analogously to the molybdenum-sulfur
Tungsten
Automation testing software tool
developed by Katalon, Inc. The software uses open-source automation frameworks Selenium, Appium and provides an IDE interface for web, API, mobile and desktop
Katalon_Studio
1959 song by Tom Lehrer and Arthur Sullivan
in the opening and closing lines: There's antimony, arsenic, aluminum, selenium, And hydrogen and oxygen and nitrogen and rhenium, ... And argon, krypton
The_Elements_(song)
American inventor
the first working selenium cell in 1883. According to CleanTechnica, the world's first rooftop solar array, using Fritts' selenium cells, was installed
Charles_Fritts
Chemical compound
occurring amino acid. The L-selenomethionine enantiomer is the main form of selenium found in Brazil nuts, cereal grains, soybeans, and grassland legumes, while
Selenomethionine
Chemical compound
Selenoyl fluoride, selenoyl difluoride, selenium oxyfluoride, or selenium dioxydifluoride is a chemical compound with the formula SeO2F2. The shape of
Selenoyl_fluoride
Medical condition
damages cartilage cells. Selenium supplementation in selenium deficient areas has been shown to prevent this disease. However, selenium supplementation in some
Kashin–Beck_disease
End-to-end testing framework
to overcome limitations in existing tools like Puppeteer, Cypress and Selenium. A team of engineers, including those who had previously worked on Puppeteer
Playwright_(software)
Human consumption of snails
41% DRI (in men). Snails are a good source of selenium. Of the recommended daily requirement of selenium, the snail provides up to 50% (in women) and 30%
Snails_as_food
Chemical compound
is the inorganic compound with the formula H2SeO4. It is an oxoacid of selenium, and its structure is more accurately described as O2Se(OH)2. It is a colorless
Selenic_acid
Ruby library for software testing
Rack interfaces. Consequently, it can only be used for Rack applications. Selenium-webdriver, which is mostly used in web-based automation frameworks, is
Capybara_(software)
Reservoir in North Carolina, United States
concern except for selenium. This led the scientists to conclude that selenium was the direct cause of fish kills in the lake. Selenium was found to be the
Belews_Lake
Anion of selenium with 4 oxygen atoms
elemental selenium. The valence state is an important factor to the toxicity of selenium. Selenate is the form required by organisms that need selenium as a
Selenate
Biotech company headquartered in Madera, California
regarding the use of selenium supplementation for the prevention of a variety of cancers. Cypress Systems, Inc. also manufactures selenium, zinc, and chromium
Cypress_Systems
Open-source performance testing software
functional testing as well. Additionally JMeter supports integration with Selenium, which allows it to run automation scripts alongside performance or load
Apache_JMeter
Type of protein
C-terminal domain is likely a means of safely transporting the very reactive selenium atom throughout the body. Selenoproteins exist in all major domains of
Selenoprotein
Chemical compound
atom is replaced with a selenium atom. Methylselenocysteine is found in many vegetables: "as much as 80% of the total selenium" found in Allium species
Methylselenocysteine
Chemical compound
Selenoneine (SEN) is a selenium-containing ergothioneine derivative where the selenium (Se) atom replaces a sulfur atom. It is made by microorganisms
Selenoneine
Chemical compound
Copper(II) selenide is an inorganic binary compound between copper and selenium, with the chemical formula CuSe. Copper(II) selenide is soluble in hydrochloric
Copper(II)_selenide
Book by William Joseph Hammer
phosphorescent and fluorescent substances. The properties and applications of selenium and the treatment of disease by the ultra violet light". The lecture was
Radium, and Other Radioactive Substances
Radium,_and_Other_Radioactive_Substances
of selenium and vitamin E in dietary intake. Soils that contain low levels of selenium produce forages and grains that are deficient in selenium. Similarly
Nutritional muscular dystrophy
Nutritional_muscular_dystrophy
Natural satellite orbiting Earth
originally a rare synonym, now almost always refers to the chemical element selenium. The corresponding prefix seleno- appears in terms including selenography
Moon
Chemical compound
Selenium oxybromide (SeOBr2) is a selenium oxohalide chemical compound. Selenium oxybromide can be prepared through the reaction of selenium dioxide and
Selenium_oxybromide
Over-the-counter brand of dandruff shampoo
Blue contains 1% selenium sulfide as its active ingredient in its most popular version (the word "Selsun" is a portmanteau of selenium sulfide + n). Chattem
Selsun_Blue
Chemical compound
providing the essential trace element selenium. Its preparation involves reacting sodium hydroxide with selenium dioxide. "Sodium hydrogen selenite". pubchem
Sodium_hydrogen_selenite
Class of solid-state x-ray digital radiography devices
Direct conversion imagers utilize photoconductors, such as amorphous selenium (a-Se), to capture and convert incident x-ray photons directly into electric
Flat-panel_detector
Selenocysteine biosynthesis enzyme
In enzymology, a L-seryl-tRNASec selenium transferase (EC 2.9.1.1) is an enzyme that catalyzes the chemical reaction L-seryl-tRNASec + selenophosphate
L-seryl-tRNASec selenium transferase
L-seryl-tRNASec_selenium_transferase
Chemical compound
Ethylphosphonoselenoic dichloride is a selenium-containing organophosphorus compound. It's the precursor to selenophos, the selenium analog of the VE nerve agent
Ethylphosphonoselenoic dichloride
Ethylphosphonoselenoic_dichloride
Device used to produce electricity from light
father's laboratory. Willoughby Smith first described the "Effect of Light on Selenium during the passage of an Electric Current" in a 20 February 1873 issue
Solar_cell
Substance that an organism uses to live
while all other chemicals are inorganic. Inorganic nutrients include iron, selenium, and zinc, while organic nutrients include, protein, fats, sugars and vitamins
Nutrient
Drug or agent applied to the skin to control seborrhea or seborrheic dermatitis
Anti-seborrheics are drugs effective in seborrheic dermatitis. Selenium sulfide, zinc pyrithione, corticosteroids, imidazole antifungals, and salicylic
Anti-seborrheic
Skin disease
treated with shampoo preparations of ketoconazole, zinc pyrithione, and selenium. Gentle, non-irritating cleansers and moisturizers are often used alongside
Seborrhoeic_dermatitis
Class of chemical compounds
compounds which contain anionic units of selenium connected to tin. They can be considered as stannates where selenium substitutes for oxygen. Similar compounds
Selenidostannate
Category of chemical elements
elements intermediate between metals and nonmetals: Carbon Phosphorus Selenium One or more of the six elements most commonly recognized as metalloids
Nonmetal
Topics referred to by the same term
Selenite may refer to: A selenium-containing anion or ionic compound with the SeO32− anion: Selenite (ion), anion is a selenium oxoanion with the chemical
Selenite
Chemical compound
passing an electric arc through liquid carbon disulfide in the presence of selenium. carbon sulfide selenide appears as a dark yellow oily liquid. Its boiling
Carbon_sulfide_selenide
Chemical compound
atoms are covalently bonded to six selenium ligands in a trigonal prismatic coordination sphere while each selenium is bonded to three tungsten atoms in
Tungsten_diselenide
35mm rangefinder camera
Image Notes 1957 I Yes, selenium No Color-Skopar 50 mm f/2.8 1958 II Yes, selenium Yes 1960 Ia Yes, selenium No IIa Yes, selenium Yes 1961 IIa Ultron 50 mm
Voigtländer_Vito
Chemical compound
solutions gradually revert to elemental selenium and carbon monoxide. Carbonyl selenide can be produced by treating selenium with carbon monoxide in the presence
Carbonyl_selenide
Science fiction short story by American writer Isaac Asimov
that their life support system is short on selenium and will soon fail. Donovan sends Speedy to a nearby selenium pool, but he does not return as expected
Runaround_(story)
Chemical compound
it is often generated by reduction of selenocystine in situ. The selenium–selenium bond length is 2.321 Å, which is 14% longer than the disulfide bond
Selenocystine
German physicist (1878–1913)
practical applications making use of the light-sensitivity properties of selenium, which he employed in developing wireless telephony using line-of-sight
Ernst_Ruhmer
Iron selenide mineral
conditions in anoxic environments. They are a source of selenium in the Rocky Mountains where selenium occurrence is associated with Upper Cretaceous shale
Ferroselite
English electrical engineer
electrical engineer who discovered the photoconductivity of the element selenium. This discovery led to the invention of photoelectric cells, including
Willoughby_Smith
Production methods of colored glass
nanometer-sized colloids (so-called striking glasses such as "gold ruby" or red "selenium ruby"), by colored inclusions (as in milk glass and smoked glass) by light
Glass coloring and color marking
Glass_coloring_and_color_marking
Canadian mining company
2020, the average selenium levels in Lake Koocanusa were 1 part per billion, while Montana had established new standards for selenium of 0.8 parts per
Teck_Resources
Chemical compound containing selenium
A selenide is a chemical compound containing a selenium with oxidation number of −2. Similar to sulfide, selenides occur both as inorganic compounds and
Selenide
Chemical compound
CSe2. It is a yellow-orange oily liquid with a pungent odor. It is the selenium analogue of carbon disulfide (CS2) and carbon dioxide (CO2). This light-sensitive
Carbon_diselenide
Chemical compound
1011–1015. doi:10.1002/zaac.19946200610. Klapötke, T.M. (1992). "Binary Selenium-Nitrogen Species and Related Compounds". In R. Steudel (ed.). The Chemistry
Tetraselenium_tetranitride
SELENIUM
SELENIUM
SELENIUM
SELENIUM
Boy/Male
American, Australian, British, English, German
Wolf's Shield; Variants of Randolph; Surname
Female
Spanish
Diminutive form of Spanish Concha, CONCHITA means "conception."
Girl/Female
Tamil
Lightning, **
Female
Vietnamese
Vietnamese name TIEN means "angel, fairy, spirit."
Girl/Female
Hindu
Playful, Goddess Durga
Boy/Male
Hindu, Indian, Tamil, Telugu
Lord of Muruga
Surname or Lastname
English (chiefly West Midlands)
English (chiefly West Midlands) : patronymic from the personal name Dicken.
Boy/Male
Muslim
Virtuous
Boy/Male
African, Arabic
Loved
Boy/Male
Hindu, Indian, Kannada, Marathi, Tamil, Telugu
Pure; Flawless
SELENIUM
SELENIUM
SELENIUM
SELENIUM
SELENIUM
n.
A metallic mineral, a selenide of copper and silver; -- so called by Berzelius on account of its being found soon after the discovery of the metal selenium.
a.
Combined with selenium as in a selenide; as, seleniureted hydrogen.
n.
A binary compound of selenium, or a compound regarded as binary; as, ethyl selenide.
n.
A selenide containing two atoms of selenium in each molecule.
a.
Of or pertaining to selenium; derived from, or containing, selenium; specifically, designating those compounds in which the element has a higher valence as contrasted with selenious compounds.
a.
Of, pertaining to, or containing, selenium; specifically, designating those compounds in which the element has a lower valence as contrasted with selenic compounds.
n.
A hypothetical radical of selenium, analogous to sulphonium.
n.
A nonmetallic element of the sulphur group, and analogous to sulphur in its compounds. It is found in small quantities with sulphur and some sulphur ores, and obtained in the free state as a dark reddish powder or crystalline mass, or as a dark metallic-looking substance. It exhibits under the action of light a remarkable variation in electric conductivity, and is used in certain electric apparatus. Symbol Se. Atomic weight 78.9.
n.
A rare nonmetallic element, analogous to sulphur and selenium, occasionally found native as a substance of a silver-white metallic luster, but usually combined with metals, as with gold and silver in the mineral sylvanite, with mercury in Coloradoite, etc. Symbol Te. Atomic weight 125.2.
n.
An element that in combination produces amphid salt; -- applied by Berzelius to oxygen, sulphur, selenium, and tellurium.
a.
Containing, or impregnated with, selenium; as, seleniferous pyrites.
a.
Resembling a utricle or bag, whether large or minute; -- said especially with reference to the condition of certain substances, as sulphur, selenium, etc., when condensed from the vaporous state and deposited upon cold bodies, in which case they assume the form of small globules filled with liquid.