All articles starting with S
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Sulfur
Sulfur, also known as native sulfur, is a pale yellow, brittle chemical element with symbol S and atomic number 16, best known as the raw material for sulfuric acid.
Sulfur amino acid metabolism
Sulfur amino acid metabolism covers methionine, cysteine, homocysteine, and taurine reactions: the methionine cycle, SAM methylation, transsulfuration to cysteine, glutathione and H2S production, and related human diseases.
Sulfur cathode
A sulfur cathode is the positive electrode of a lithium–sulfur battery, whose 1675 mAh g⁻¹ theoretical capacity far exceeds commercial lithium-ion cathodes but suffers from the polysulfide shuttle effect.
Sulfur Cave
Sulfur Cave is a 520 m-long cave formed by sulfidic thermal water on the Greek-Albanian border, known for hosting the largest known spider web, home to about 111,000 spiders.
Sulfur concrete
Sulfur concrete is a waterless composite in which molten sulfur replaces Portland cement as the binder, hardening by cooling within hours and resisting acids, salts, and seawater.
Sulfur cycle
The sulfur cycle is the set of pathways by which sulfur moves among Earth's crust, oceans, atmosphere, and living matter, moving over 50 million tons yearly.
Sulfur dioxide
Sulfur dioxide, also called sulfurous anhydride, is a colorless, pungent gas (SO₂) released mainly by fossil fuel combustion and volcanoes, and used as a food preservative.
Sulfur hexafluoride
Sulfur hexafluoride (SF6) is a synthetic, inert, non-flammable gas with insulation capacity far exceeding air, used in high-voltage switchgear and known as the greenhouse gas with the highest global warming potential.
Sulfur metabolism
Sulfur metabolism: microbial oxidation, reduction, and disproportionation of sulfur compounds between sulfide (-2) and sulfate (+6). Key pathways Sox, rDSR, S4I; sulfur-oxidizing bacteria applied in H2S detoxification, wastewater treatment, and bioleaching.
Sulfur Surfer
Sulfur Surfer is Bladee's (Benjamin Reichwald) eighth solo album, released May 20, 2026 on Trash Island; 13 rap tracks, 46 minutes, fully produced by Whitearmor, sole guest David Tibet of Current 93.
Sulfur trioxide
Sulfur trioxide, also called sulfuric anhydride, is the oxide of sulfur in its +6 state and the anhydride of sulfuric acid, made industrially in the contact process.
Sulfur vulcanization
Sulfur vulcanization is the chemical process discovered by Charles Goodyear in 1839 that forms sulfur bridges between rubber polymer chains, converting soft rubber into elastic cross-linked material for tires.
Sulfur-35
Sulfur-35 is a radioactive isotope of sulfur with a half-life of about 87.4 days that decays by beta emission to chlorine-35, a standard radiolabel of molecular biology.
Sulfur–iodine cycle
The sulfur–iodine cycle, also known as the iodine–sulfur or IS process, is a three-step thermochemical method of producing hydrogen from water and high-temperature heat, developed by General Atomics in the 1970s.
Sulfur(VI) fluoride exchange
Sulfur(VI) fluoride exchange (SuFEx) is a metal-free click chemistry reaction class, reported in 2014, in which sulfonyl fluorides and fluorosulfates form stable sulfonamides, sulfonates, and polysulfates.
Sulfuric acid
Sulfuric acid (H2SO4, historically oil of vitriol) is a dense, colorless, oily diprotic acid, one of the most-produced chemicals in the world, made by the contact process and used chiefly to make phosphate fertilizer.
Sulfuric acid and sodium sulfate antimicrobial
Sulfuric acid and sodium sulfate antimicrobial: GRAS Notice GRN 408 combination of H2SO4 and Na2SO4 used as acidifier/antimicrobial on meat and poultry; FDA no-questions letter, March 2012.
Sulfuric acid mist
Sulfuric acid mist is an airborne aerosol of sulfuric acid droplets formed when sulfur trioxide meets water vapor, a regulated industrial emission classified as carcinogenic to humans.
Sulfurized polyacrylonitrile
Sulfurized polyacrylonitrile (SPAN, also written S@pPAN or S@PAN) is a composite cathode material for lithium–sulfur batteries, made by co-heating sulfur with polyacrylonitrile and first reported in July 2002 by Jiulin Wang and colleagues.
Sulfuryl chloride
Sulfuryl chloride (SO₂Cl₂) is a colorless to yellow fuming liquid with a pungent odor, boiling at 69.1 °C, used as a chlorinating agent and in lithium batteries.
Sulfuryl fluoride
Sulfuryl fluoride is a colorless, odorless, non-flammable gas used as a structural fumigant against termites and other wood-destroying pests, marketed principally as Vikane and first registered in 1959.
Sulh versus anwa land doctrine
The sulh versus anwa land doctrine is the early Islamic legal distinction between land surrendered by treaty and land taken by force, determining ownership and whether tax could lapse.
Suliana Manley
Suliana Manley is an American biophysicist and full professor at EPFL who heads the Laboratory of Experimental Biophysics, developing smart and super-resolution microscopy to study the mitochondrial life cycle.
Sulindac
Sulindac, formerly marketed by Merck as Clinoril, is a nonsteroidal anti-inflammatory drug of the indene acetic acid class, unusual in being a prodrug, prescribed for arthritis, gout, and painful shoulder.
Sulis Corona
Sulis Corona is a 136-km-diameter corona (volcano-tectonic feature) on Venus at 44.30N, 14.20E, IAU-named in 2000 for the British goddess of springs; a doughnut-shaped fracture ring and rim, distinct from the SULIS solar mission.
Suliyari Coal Mine
Suliyari Coal Mine, recorded as Suliyari Belwar, is an opencast coal mine in Singrauli district, Madhya Pradesh, owned by APMDC and run by Adani Enterprises.
Suljo Linic
Suljo Linic is a chemical engineer and Martin Lewis Perl Collegiate Professor at the University of Michigan, known for plasmon-mediated catalysis and predictive catalyst design combining computation and machine learning.
Sulkhan Tamazashvili
Sulkhan Tamazashvili is a Georgian politician who has served as Minister of Internal Affairs of Georgia since April 2026, having previously been Chairman of the Government of Adjara.
Sulkhan-Saba Orbeliani
Sulkhan-Saba Orbeliani was a Georgian writer, lexicographer, monk, and diplomat who wrote The Book of Wisdom and Lies and led a Georgian embassy to France and Italy in 1713–1715.
Sulla
Lucius Cornelius Sulla Felix (138–78 BCE), Roman dictator and general; first to march an army on Rome (88, 83/82 BCE); proscriptions, constitutional reforms strengthening the Senate, resignation 79 BCE.