Wujing Zongyao: The Wujing Zongyao (), or the Complete Essentials for the Military Classics, is a Chinese military compendium written from around 1040 to 1044. It contains the earliest known written formulas for gunpowder, made from saltpeter, sulphur, and charcoal, along with many added ingredients.CapravirineMetal sulfur dioxide complex: Metal sulfur dioxide complexes are complexes that contain sulfur dioxide, SO2, bonded to a transition metal. Such compounds are common but are mainly of theoretical interest.KonzoLewisiteSodium tetrasulfideSodium thiosulfateCarbonyl sulfideHeliobacteria: The heliobacteria are phototrophic: they convert light energy into chemical energy by photosynthesis and they use a Type I reaction centerHeinickel and Golbeck 2007. The primary pigment involved is bacteriochlorophyll g, which is unique to the group and has a unique absorption spectrum; this gives the heliobacteria their own environmental niche.SRX expansion boardHoneywell Uranium Hexafluoride Processing Facility: The Honeywell Uranium Hexafluoride Processing Facility, a uranium conversion facility, is located 3 km northwest of Metropolis, Illinois. The plant, Honeywell Specialty Chemicals in Metropolis, Illinois, has a nominal capacity of 15,000 tU as uranium hexafluoride per year.Purple sulfur bacteria: The purple sulfur bacteria are a group of Proteobacteria capable of photosynthesis, collectively referred to as purple bacteria. They are anaerobic or microaerophilic, and are often found in hot springs or stagnant water.Timeline of chemical warfareMolybdopterin synthase sulfurtransferase: Molybdopterin synthase sulfurtransferase (, adenylyltransferase and sulfurtransferase MOCS3, Cnx5 (gene), molybdopterin synthase sulfurylase) is an enzyme with system name persulfurated L-cysteine desulfurase:(molybdopterin-synthase sulfur-carrier protein)-Gly-Gly sulfurtransferase. This enzyme catalyses the following chemical reactionAmmonium sulfiteIsorenieratenePotassium hydrosulfideTable of standard reduction potentials for half-reactions important in biochemistry: The values below are standard reduction potentials for half-reactions measured at 25°C, 1 atmosphere and a pH of 7 in aqueous solution.Flavocytochrome c sulfide dehydrogenase: In molecular biology, flavocytochrome c sulfide dehydrogenase is an enzyme found in sulfur-oxidising bacteria such as the purple phototrophic bacteria Chromatium vinosum. These enzymes are dimers of a flavoprotein and a dihaem cytochrome that carry out hydrogen sulfide-dependent cytochrome C reduction.Sodium sulfiteMethionineAcidithiobacillus: Acidithiobacillus is a genus of Proteobacteria. Like all Proteobacteria, Acidithiobacillus is Gram-negative.Suplatast tosilateSulfate-reducing bacteria: Sulfate-reducing bacteria are those bacteria and archaea that can obtain energy by oxidizing organic compounds or molecular hydrogen (H2) while reducing sulfate () to hydrogen sulfide (H2S). In a sense, these organisms "breathe" sulfate rather than oxygen in a form of anaerobic respiration.Iron-sulfur cluster biosynthesis protein family: In molecular biology, the iron-sulfur cluster biosynthesis protein family of includes proteins involved in biogenesis of Fe-S clusters (iron-sulfur cluster insertion protein, Fe/S biogenesis protein). This family includes IscA, HesB, YadR and YfhF-like proteins.Sulfurtransferase: A sulfurtransferase is a transferase enzyme that act upon atoms of sulfur.Rusticyanin: Rusticyanin is a copper-containing protein which is involved in electron-transfer, being a strong oxidant. It is a cupredoxin, or blue-copper protein due to its colour, and can be extracted from the bacteria Thiobacillus ferrooxidans.Perchloromethyl mercaptanP-AnisidineColes PhillipsThiomargarita namibiensis: Thiomargarita namibiensis is a gram-negative coccoid Proteobacterium, found in the ocean sediments of the continental shelf of Namibia. It is the largest bacteria ever discovered, as a rule in diameter, but sometimes attaining .CystineSulfurimonas: Sulfurimonas is a bacterial genus within the class Epsilonproteobacteria. The members of this group grow chemolithoautotrophically using zero valent sulfur, molecular hydrogen or reduced sulfur compounds as electron donors and nitrate, nitrite and oxygen as electron acceptors.PyrosequencingList of enzymes: This article is a list of enzymes, sorted by their respective sub-categories and EC number.Alkalimonas: Alkalimonas is a genus in the phylum Proteobacteria (Bacteria).Ampullaviridae: Ampullaviridae is a family of viruses that infect archaea of the genus Acidianus. Only one genus in this family has been described, Ampullavirus, which contains one species, Acidianus bottle-shaped virus.Deep chlorophyll maximum: A deep chlorophyll maximum (DCM) is a subsurface maximum in the concentration of chlorophyll in the ocean or a lake. A DCM is not always present--sometimes there is more chlorophyll at the surface than at any greater depth--but it is a common feature of most aquatic ecosystems.Air pollution: Air pollution is the introduction of particulates, biological molecules, or other harmful materials into Earth's atmosphere, causing diseases, death to humans, damage to other living organisms such as animals and food crops, or the natural or built environment. Air pollution may come from anthropogenic or natural sources.Aerobic anoxygenic photoheterotroph bacteria: Aerobic anoxygenic photoheterotrophic bacteria (AAPB), also named aerobic anoxygenic photoheterotrophs (AAPs), is a group of bacteria that are primarily heterotrophic but can utilize light energy through bacterial chlorophyll a.Nianzhi Jiao, Gerhard J.Nitrogen deficiencyMolybdenum: Molybdenum is a chemical element with symbol Mo and atomic number 42. The name is from Neo-Latin molybdaenum, from Ancient Greek , meaning lead, since its ores were confused with lead ores.Nankai Trough gas hydrate site: Nankai Methane Hydrate Site (or Japanese Methane Hydrate R&D Program at Nankai, Nankai Trough Methane Hydrate Site) is located in the Nankai Trough, Japan.Branching order of bacterial phyla (Gupta, 2001): There are several models of the Branching order of bacterial phyla, one of these was proposed in 2001 by Gupta based on conserved indels or protein, termed "protein signatures", an alternative approach to molecular phylogeny. Some problematic exceptions and conflicts are present to these conserved indels, however, they are in agreement with several groupings of classes and phyla.Glucose-methanol-choline oxidoreductase family: In molecular biology, the glucose-methanol-choline oxidoreductase family (GMC oxidoreductase) is a family of enzymes with oxidoreductase activity.McIntosh and Filde's anaerobic jar: McIntosh and Filde's anaerobic jar is an instrument used in the production of an anaerobic environment. This method of anaerobiosis as others is used to culture bacteria which die or fail to grow in presence of oxygen (anaerobes).Iron stress repressed RNA: Iron stress repressed RNA (IsrR) is a cis-encoded antisense RNA which regulates the expression of the photosynthetic protein isiA. IsiA expression is activated by the Ferric uptake regulator protein (Fur) under iron stress conditions.Wet sulfuric acid process: The wet sulfuric acid process (WSA process) is one of the key gas desulfurization processes on the market today. Since the Danish catalyst company Haldor Topsoe introduced and patented this technology in the late 1980s, it has been recognised as an efficient process for recovering sulfur from various process gasses in the form of commercial quality sulfuric acid (H2SO4), with simultaneous production of high pressure steam.Exogenous bacteria: Exogenous bacteria are microorganisms introduced to closed biological systems from the external world. They exist in aquatic and terrestrial environments, as well as the atmosphere.Transsulfuration pathway: The transsulfuration pathway is a metabolic pathway involving the interconversion of cysteine and homocysteine, through the intermediate cystathionine.Bacterial oxidation: Bacterial oxidation is a biohydrometallurgical process developed for pre-cyanidation treatment of refractory gold ores or concentrates. The bacterial culture is a mixed culture of Acidithiobacillus ferrooxidans, Acidithiobacillus thiooxidans and Leptospirillum ferrooxidans.Bacteriochlorophyll: Bacteriochlorophylls are photosynthetic pigments that occur in various phototrophic bacteria. They were discovered by C.TetrathionateList of largest volcanic eruptions: In a volcanic eruption, lava, tephra (volcanic bombs, lapilli, and ash), and various gases are expelled from a volcanic vent or fissure. While many eruptions only pose dangers to the immediately surrounding area, Earth's largest eruptions can have a major regional or even global impact, with some affecting the climate and contributing to mass extinctions.HalitosisCarbon–carbon bond: A carbon–carbon bond is a covalent bond between two carbon atoms. The most common form is the single bond: a bond composed of two electrons, one from each of the two atoms.Amplified Ribosomal DNA Restriction Analysis: Amplified rDNA (Ribosomal DNA) Restriction Analysis is the extension of the technique of RFLP (restriction fragment length polymorphism) to the gene encoding the small (16s) ribosomal subunit of bacteria. The technique involves an enzymatic amplification using primers directed at the conserved regions at the ends of the 16s gene, followed by digestion using tetracutter Restriction enzymes.Ferric uptake regulator family: In molecular biology, the ferric uptake regulator (FUR) family of proteins includes metal ion uptake regulator proteins. These are responsible for controlling the intracellular concentration of iron in many bacteria.TaurineSodium selenideFecal coliform: A fecal coliform (British: faecal coliform) is a facultatively anaerobic, rod-shaped, gram-negative, non-sporulating bacterium. Coliform bacteria generally originate in the intestines of warm-blooded animals.Acid Rain Retirement Fund: The Acid Rain Retirement Fund (A.R.DNA sequencer: A DNA sequencer is a scientific instrument used to automate the DNA sequencing process. Given a sample of DNA, a DNA sequencer is used to determine the order of the four bases: G (guanine), C (cytosine), A (adenine) and T (thymine).Stratosphere: The stratosphere is the second major layer of Earth's atmosphere, just above the troposphere, and below the mesosphere. It is stratified in temperature, with warmer layers higher up and cooler layers farther down.Hydrogen gas porosity: Hydrogen gas porosity is an aluminium casting defect under the form of a porosity or void in an aluminium casting caused by a high level of hydrogen gas (H2) dissolved in the aluminium at liquid phase. Because the solubility of hydrogen in solid aluminium is much smaller than in liquid aluminium, when the aluminium freezes, the dissolved hydrogen gas creates porosity in solid aluminium.Indian Ridge Hospital Open Invitational: The Indian Ridge Hospital Open Invitational was a PGA Tour satellite event that played for one year at the Indian Ridge Country Club in Andover, Massachusetts. The tournament, which was held in August 1969 and organized by Indian Ridge head club pro Ross Coon, benefited the Children's Hospital of Boston.Lyase: In biochemistry, a lyase is an enzyme that catalyzes the breaking (an "elimination" reaction) of various chemical bonds by means other than hydrolysis (a "substitution" reaction) and oxidation, often forming a new double bond or a new ring structure. The reverse reaction is also possible (called a "Michael addition”).Alan S. Kornacki: Alan Stanley Kornacki (born May 4, 1952, in Bayonne, New Jersey) is an American geologist and retired Army colonel, currently the Senior Staff Geochemist at Shell International Exploration and Production Inc."...List of hot springs: There are hot springs on all continents and in many countries around the world. Countries that are renowned for their hot springs include Honduras, Canada, Chile, Hungary, Iceland, Israel, Japan, New Zealand and United States, but there are interesting and unique hot springs in many other places as well.Eagle's minimal essential medium: Eagle's minimal essential medium (EMEM) is a cell culture medium developed by Harry Eagle that can be used to maintain cells in tissue culture.Protein primary structure: The primary structure of a peptide or protein is the linear sequence of its amino acid structural units, and partly comprises its overall biomolecular structure. By convention, the primary structure of a protein is reported starting from the amino-terminal (N) end to the carboxyl-terminal (C) end.Transition metal oxo complexSulfonucleotide reductase: In biology, a sulfonucleotide reductase is actually a class of enzymes involved in reductive sulfur assimilation. This reaction consists of a conversion from activated sulfate to sulfite.