Everything below concerns LC-MS/MS. We keep the language plain, cite what the science says, and separate well-supported claims from open questions.
Last reviewed on 2026-02-20. Where a claim depends on a specific study, the study is described rather than over-claimed.
In laboratory settings, SR9009 is commonly identified by its molecular structure and its interaction with REV-ERB receptors. Vendors may list it under synonyms such as Stenabolic or REV-ERB agonist, but those names do not define purity or identity. Analytical confirmation typically uses high-performance liquid chromatography with ultraviolet detection or liquid chromatography–mass spectrometry. A reference standard is needed to compare retention time and mass spectrum, because the compound can be confused with related research chemicals.
Handling practices for SR9009 focus on minimizing degradation and contamination. The solid is generally stored desiccated at or below -20 °C, protected from light and moisture. Stock solutions are often prepared in dimethyl sulfoxide or ethanol, then aliquoted to avoid repeated freeze–thaw cycles. Aqueous solubility is low, so formulations for animal studies may require cosolvents or suspending agents. Personnel should follow institutional chemical safety procedures, because toxicological data for humans are incomplete.
Regulatory status varies by country and intended use. Major drug agencies have not granted marketing authorization for SR9009 as a medicine, and it is not listed as a controlled substance in many jurisdictions. It is often sold as a research chemical, a category that may fall outside pharmaceutical manufacturing rules. Buyers should verify local laws and supplier documentation, including certificates of analysis. The lack of standardized quality controls raises concerns about identity, purity, and actual content in products marketed online.
Storage recommendations for SR9009 reference material typically specify a freezer at -20 °C or lower, with protection from moisture and light. Repeated freeze-thaw cycles can degrade small molecules and introduce variability. Stock solutions in dimethyl sulfoxide are often aliquoted to avoid repeated handling. Stability studies may examine degradation under heat, humidity, and light exposure. The compound's thiophene and nitro groups can participate in reactions that alter analytical signals over time, so such changes affect quantitative results.
Quality control for research materials includes identity confirmation by nuclear magnetic resonance and purity assessment by high-performance liquid chromatography. Mass spectrometry provides molecular weight confirmation and can detect related impurities. Purchasers should request a certificate of analysis that lists lot-specific data. Online products advertised for human use often lack such documentation. Distinguishing legitimate research material from mislabeled or contaminated samples is a recurring challenge in independent testing, and independent laboratories may use orthogonal methods to verify identity.
| Property | Value | Notes |
|---|---|---|
| Appearance | White to off-white solid | Visual inspection is not sufficient for identity. |
| Solubility | Soluble in DMSO and ethanol | Low solubility in water. |
| Typical storage | -20 °C, desiccated, dark | Protect from repeated temperature changes. |
| Common analytical method | LC-MS or HPLC-UV | Reference standard required for comparison. |
| Common synonyms | SR9009; Stenabolic; REV-ERB agonist | Vendor naming may vary. |
The mechanism of action involves binding to REV-ERB receptors and recruiting corepressor complexes, which represses target gene transcription. This contrasts with many nuclear receptor agonists that activate transcription. Downstream effects may include changes in autophagy, mitochondrial biogenesis, and lipid handling, but the precise pathways remain an active area of study. Whether these molecular events translate into meaningful physiological effects in humans is unresolved. Most evidence comes from cultured cells and rodent models rather than human participants.
SR9009 is a synthetic small molecule developed as an agonist of the nuclear receptors REV-ERBα (NR1D1) and REV-ERBβ (NR1D2). These receptors help regulate circadian rhythms and metabolic gene expression. In cell and animal studies, SR9009 alters transcription of genes involved in lipid metabolism, inflammation, and mitochondrial function. It is not an approved medicine, and its pharmacological profile in humans remains largely uncharacterized. The compound is frequently discussed in the context of circadian biology and metabolic research rather than clinical use.
Preclinical reports have linked SR9009 to improved endurance and altered energy expenditure in rodents. Such findings have prompted interest in whether REV-ERB activation can influence skeletal muscle metabolism. However, the reported effects depend on dose, route, and experimental model, and replication across laboratories is limited. Human trials have not established comparable outcomes, so claims about exercise performance remain speculative. The absence of controlled human data is a central limitation in interpreting these observations.
Regulatory and sporting contexts treat SR9009 as a prohibited substance in many elite competitions. Its presence on banned lists reflects concerns about performance enhancement and unknown long-term safety. Analytical chemists have developed methods to detect the parent compound and its metabolites in urine and blood. Literature discussions distinguish between in vitro potency, animal pharmacology, and anecdotal human reports. The latter are difficult to verify because products sold online may lack purity or contain different compounds.
SR9009 is a synthetic small molecule studied as an agonist of the nuclear receptors REV-ERBα and REV-ERBβ. These receptors help regulate circadian rhythms, lipid metabolism, and inflammatory gene expression. In cell and animal experiments, SR9009 alters transcription of clock-controlled genes and metabolic pathways. The compound is not a hormone and does not resemble classical steroid structures. Its activity depends on binding to the ligand-binding domain of REV-ERB, where it can modify corepressor recruitment.
Storage conditions for research-grade SR9009 generally involve a freezer at approximately minus twenty degrees Celsius, sometimes lower for long-term preservation. Containers should remain tightly closed and protected from light. Desiccants may be used to limit moisture uptake. Solutions are often stored in aliquots to avoid repeated warming and cooling. Stability data for the compound under various conditions are limited, so laboratories typically follow supplier recommendations and verify performance through periodic analytical checks rather than assuming indefinite stability.
Identity and purity testing for SR9009 commonly uses liquid chromatography coupled with tandem mass spectrometry. This method separates the compound from matrix components and detects it by mass-to-charge transitions, providing sensitive and specific confirmation. Nuclear magnetic resonance spectroscopy can support structural identification, while high-performance liquid chromatography with ultraviolet detection may estimate purity. Because online products labeled as SR9009 may contain other substances or no active compound at all, independent verification is important in research settings. Certificates of analysis are useful but not a substitute for in-house testing.
Laboratory samples of SR9009 are typically supplied as a white to off-white powder. The compound dissolves readily in organic solvents such as dimethyl sulfoxide and ethanol, while its solubility in water is low. Because of this solubility profile, researchers often prepare concentrated stock solutions in an organic solvent before diluting them into aqueous assay buffers. Light exposure, moisture, and repeated freeze-thaw cycles can degrade many small molecules, so handling procedures usually aim to minimize these factors. Purity is commonly checked before use.
== Pultronics today == Today (>1998), Pultronics is involved in the RFID industry with its active RFID systems for long-range wireless data communications. Tracking of goods/assets through a cold chain is a typical usage of such systems. Pultronics is also active in the micro-transmitter system design including design of ASICs resulting in miniature sized active tags.
=== Notable people === The American pop singer Michael Jackson had the condition, which he obscured with costumes and makeup until it covered his body. This led to some inaccurate speculation that he had bleached his skin. Other notable cases include the American rapper Krizz Kaliko, the Canadian fashion model Winnie Harlow, the New Zealand singer-songwriter Kimbra, the American actor David Dastmalchian, the Argentine musician Charly García, the professional wrestler Bryan Danielson, the French actor Michaël Youn, the former French Prime Minister Édouard Philippe, Miss Universe Egypt 2024 Logina Salah, governor of Pampanga Eddie Panlilio, and the Colombian model Taliana Vargas.
== Postsurgical healing == The healing corneal wounds consist of newly abutting corneal stroma, fibroblastic cells, and irregular fibrous connective tissue. Closer to the wound surface lies the epithelial plug, a bed of the cells that form the normal corneal epithelium which have fallen into the wound. Often this plug is three to four times as deep as the normal corneal epithelium layer. As the cells migrate from the depth of the plug up to the surface, some die before reaching it, forming breaches in the otherwise healthy epithelial layer. This, consequently, leaves the cornea more susceptible to infections. The risk is estimated to be between 0.25% and 0.7% Healing of the RK incisions is very slow and unpredictable, often incomplete even years after surgery. Similarly, infection of these chronic wounds can also occur years after surgery, with 53% of ocular infections being late in onset.
=== Disruptions to agrifood systems === Agrifood systems are exposed to shocks and stresses of various types that differ in nature and intensity, including those impair agrifood systems by disrupting the operations of related institutions, supply chains and actors. Agrifood markets are operating in an era marked by recurrent, increasingly severe and overlapping shocks, including extreme weather events, conflicts, pandemics, financial crises, disease outbreaks, and sharp increases in energy and agricultural input prices. These shocks have disrupted production, trade flows and markets, exposing vulnerabilities across food supply chains. In a highly interconnected global economy, disruptions originating in one region can rapidly propagate across borders, affecting food availability, affordability and accessibility far beyond the location of the initial shock.
Sources: en.wikipedia.org
===== MeSH D08.811.464.267 – carbon-sulfur ligases (EC 6.2) ===== MeSH D08.811.464.267.500 – coenzyme a ligases MeSH D08.811.464.267.500.200 – acetate-coa ligase MeSH D08.811.464.267.500.600 – succinate-coa ligases
Hong Kong has two theme parks. Hong Kong Disneyland on Lantau Island is a major theme park and resort destination. Ocean Park Hong Kong combines rides and animal exhibits, with zones across the Waterfront and Summit areas. For big events, Kai Tak Sports Park anchors the city's newest entertainment hub, built on the former airport site, with a 50,000-seat main stadium and a retractable roof. Hong Kong Stadium remains a key venue for football and major fixtures in Causeway Bay, with a capacity of 40,116. AsiaWorld-Expo near the airport hosts concerts, exhibitions, and large-scale conventions across multiple halls and an arena-style space. Hong Kong Convention and Exhibition Centre is the core waterfront venue in Wan Chai for exhibitions, meetings, and shows.
There are two tiers of local government covering Wilmslow, at parish (town) and unitary authority level: Wilmslow Town Council and Cheshire East Council. The town council is based at the Parish Hall on Cliff Road.
==== Hoyer's mounting medium ==== Chloral hydrate is also an ingredient used for Hoyer's solution, a mounting medium for microscopic observation of diverse plant types such as bryophytes, ferns, seeds, and small arthropods (especially mites). Other ingredients may include gum arabic and glycerol. An advantage of this medium includes a high refractive index and clearing (macerating) properties of small specimens (especially advantageous if specimens require observation with differential interference contrast microscopy). Because of its status as a regulated substance, chloral hydrate can be difficult to obtain. This has led to chloral hydrate being replaced by alternative reagents in microscopy procedures.
They return to the surface where they are forced to defeat Wheatley before his ineptitude with the Aperture systems causes the facility reactors to become critical and explode. GLaDOS is returned to her original place and returns the facility to normal. GLaDOS then lets Chell go, realizing that the prospect of trying to kill her is too much trouble. Instead, she turns to two robots of her own creation, Atlas and P-Body, to locate a mythical store of additional human subjects kept in cryogenic sleep for her to continue testing on. In addition to these characters, the game includes numerous laser-seeking turrets that seek to kill the player-characters, though are apologetic for it; most are voiced by McLain, though some defective ones in the sequel are voiced by Nolan North. GLaDOS introduces Chell to the "Weighted Companion Cube", appearing similar to other Weighed Cubes (crates) in the game, but decorated with hearts on its sides; GLaDOS attempts to make Chell believe the Companion Cube is a sentient object and a key to her survival, before having Chell dispose of it in an incinerator in order to leave a test chamber. Both games feature other personality cores that were constructed to keep GLaDOS in check; the first game includes three cores, the Morality, Curiosity, and Intelligence Cores, voiced by McLain as well as a snarling Anger Core voiced by Mike Patton. In Portal 2, three more such cores (beyond Wheatley) are introduced including the irrelevant Fact Core, the bold Adventure Core, and the space-obsessed Space Core, each voiced by North.
Sources: en.wikipedia.org
Isotope masses from: Audi, Georges; Bersillon, Olivier; Blachot, Jean; Wapstra, Aaldert Hendrik (2003), "The NUBASE evaluation of nuclear and decay properties", Nuclear Physics A, 729: 3–128, Bibcode:2003NuPhA.729....3A, doi:10.1016/j.nuclphysa.2003.11.001 Isotopic compositions and standard atomic masses from: de Laeter, John Robert; Böhlke, John Karl; De Bièvre, Paul; Hidaka, Hiroshi; Peiser, H. Steffen; Rosman, Kevin J. R.; Taylor, Philip D. P. (2003). "Atomic weights of the elements. Review 2000 (IUPAC Technical Report)". Pure and Applied Chemistry. 75 (6): 683–800. doi:10.1351/pac200375060683. Wieser, Michael E. (2006). "Atomic weights of the elements 2005 (IUPAC Technical Report)". Pure and Applied Chemistry. 78 (11): 2051–2066. doi:10.1351/pac200678112051. "News & Notices: Standard Atomic Weights Revised". International Union of Pure and Applied Chemistry. 19 October 2005. Half-life, spin, and isomer data selected from the following sources. Audi, Georges; Bersillon, Olivier; Blachot, Jean; Wapstra, Aaldert Hendrik (2003), "The NUBASE evaluation of nuclear and decay properties", Nuclear Physics A, 729: 3–128, Bibcode:2003NuPhA.729....3A, doi:10.1016/j.nuclphysa.2003.11.001 National Nuclear Data Center. "NuDat 3.0 database". Brookhaven National Laboratory. Holden, Norman E. (2004). "11. Table of the Isotopes". In Lide, David R. (ed.). CRC Handbook of Chemistry and Physics (85th ed.). Boca Raton, Florida: CRC Press. ISBN 978-0-8493-0485-9.
== Detroit Lions == It has been said that Detroit Lions' announcer Van Patrick applied the nickname "Fearsome Foursome" to the Lions front four as early as 1960, when the Lion defensive line consisted of ends Bill Glass and Darris McCord, and tackles Alex Karras and Roger Brown. Other reports state that sportswriter Bruno Kerns of the Pontiac Press first used the Fearsome Four nickname for the Lions' defensive line in 1960. The Fearsome Foursome name for the Lions' defensive line continued after Sam Williams replaced Glass in 1962; Glass being traded to the Cleveland Browns for quarterback Milt Plum after the 1961 season. Other than 1963, McCord, Karras, Brown and Williams started together from 1962 through 1965; until Williams was taken by the Atlanta Falcons in the 1966 expansion draft. Karras missed the 1963 season as he was suspended in connection with alleged gambling. Their most well-known game was the 1962 "Thanksgiving Day Massacre" game against the Green Bay Packers, where they sacked Bart Starr 11 times (seven by Brown) and broke the Packers 12-game winning streak. The group's early defensive coordinator was future Pro Football Hall of Fame head coach Don Shula. Karras is in the Pro Football Hall of Fame. The 6 ft 5 in (1.96 m) 300 pound (136 kg) Brown, was one of the first NFL lineman to play at 300 pounds or more, with the speed and agility to make him highly effective at that weight. Brown was named to the Pro Bowl as a Lion from 1962 through 1966 and first-team All-Pro twice (1962-63).
Many substances regarded as poisons are toxic only indirectly, by toxication. An example is "wood alcohol" or methanol, which is not poisonous itself, but is chemically converted to toxic formaldehyde and formic acid in the liver. Many drug molecules are made toxic in the liver, and the genetic variability of certain liver enzymes makes the toxicity of many compounds differ between individuals. Exposure to radioactive substances can produce radiation poisoning, an unrelated phenomenon. Two common cases of acute natural poisoning are theobromine poisoning of dogs and cats, and mushroom poisoning in humans. Dogs and cats are not natural herbivores, but a chemical defense developed by Theobroma cacao can be incidentally fatal nevertheless. Many omnivores, including humans, readily consume edible fungi, and thus many fungi have evolved to become decisively inedible, in this case as a direct defense.
The city was procuring only electric buses as of 2021, gradually replacing the diesel bus fleet. Moscow was expected to become the leading European city in its share of electric versus gas fuel in public transit by 2019.
== Role in detoxification of xenobiotic substances == One of the primary roles of bacterial glutathione transferases is to reduce the toxic effects of xenobiotics from the cell using the phase II system of detoxification metabolism. Xenobiotics are compounds foreign to the bacterium's natural biochemistry, and phase II of their detoxification involves conjugating them to polar, soluble compounds that can be safely excreted from the cell. GSTs are essential in this process because they catalyze the nucleophilic attack of glutathione on various electrophilic residues of xenobiotic substrates, thereby preventing their disruption of vital cellular proteins and nucleic acids. Similar to the mechanism GSTs use for catalyzation of redox reactions, the mechanism for detoxification first involves the binding of two substrates to the enzyme. A GST monomer binds a glutathione molecule to its N-terminal glutathione-binding site. On the adjacent hydrophobic alpha-helical binding site on the C-terminal domain, the GST binds a hydrophobic xenobiotic molecule. Formation of the active site recruits another GST monomer to interact with the system and the enzymes dimerize. The active GST complex catalyzes the -SH residue on glutathione to perform a nucleophilic attack on electrophilic carbon, sulfur, or nitrogen atoms of the xenobiotic substrate. The conjugation of glutathione on the previously hydrophobic-toxic substrate results in a soluble compound, which is more readily exocytosed by the cell.
Sources: en.wikipedia.org
Liquid chromatography–mass spectrometry is common for identity and purity checks. High-performance liquid chromatography with ultraviolet detection can also be used. Both methods require a suitable reference standard.
The solid is usually kept desiccated at -20 °C or lower and protected from light. Stock solutions are aliquoted to limit freeze–thaw cycles. Aqueous solutions are not generally recommended for long-term storage.
Laws differ by country and by intended use. It is not an approved medicine, and many vendors sell it as a research chemical. Purchasers are responsible for confirming local restrictions.
Liquid chromatography-tandem mass spectrometry is a common approach. It can detect the parent compound and its metabolites in biological matrices.