circadian rhythm raises a handful of sensible questions. This page answers them in order, starting with the fundamentals and moving to applications.
Reviewed 2026-06-23. Anything still debated is marked as such rather than presented as settled.
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.
Several misconceptions surround SR9009. It is often described as a SARM, a steroid, or an exercise pill, but its known target is the REV-ERB receptor family. Rodent studies have examined exercise capacity and metabolic markers, yet human outcomes remain unproven. Oral bioavailability appears low in animals, and human pharmacokinetics are not well characterized. Online products may contain impurities or different compounds, so identity and purity testing are important for research use.
Analytical chemists detect SR9009 with liquid chromatography-tandem mass spectrometry, commonly abbreviated LC-MS/MS. Sample preparation may involve protein precipitation, liquid-liquid extraction, or solid-phase extraction before analysis. Laboratories can target the parent compound or its metabolites, depending on the matrix and the purpose of testing. Anti-doping methods require sensitive and specific assays because concentrations in biological samples can be low. Reference standards and validated methods are essential for reliable identification and quantification.
Regulatory agencies have not approved SR9009 for human therapeutic use. It is typically sold as a research chemical with labels stating that it is not for human consumption. The World Anti-Doping Agency prohibits the substance in sport, generally under the category of non-approved substances. Customs and national laws may restrict importation, sale, or possession. Product quality and legal status can vary by country and vendor, and therapeutic claims are not permitted in regulated advertising because the compound lacks approval.
| Property | Value | Notes |
|---|---|---|
| Appearance | White to off-white powder | Typical for research-grade material |
| Solubility | Soluble in DMSO and ethanol; low aqueous solubility | Organic stock solutions are common |
| Typical storage temperature | -20 °C or lower | Protect from light and moisture |
| Common analytical method | LC-MS/MS | Used for detection and confirmation |
| Common synonyms | SR9009; Stenabolic | Stenabolic is an informal name |
SR9009 is generally described as poorly soluble in water and more soluble in organic solvents such as dimethyl sulfoxide and ethanol. Stock solutions are commonly prepared in an organic solvent before dilution into an aqueous buffer or vehicle. Precipitation can occur if the organic fraction is reduced too quickly or if the final concentration exceeds the compound's solubility limit. Sonication or gentle warming may aid dissolution in some protocols, but excessive heat can promote degradation. Container material and pH can also influence observed solubility.
For long-term storage, SR9009 is typically kept as a solid at low temperature, protected from moisture and light. Desiccated conditions limit hydrolysis, while opaque containers reduce photochemical breakdown. Solutions are less stable than solids and are often stored frozen in aliquots to avoid repeated freeze-thaw cycles. Stability data are not standardized across all suppliers, so users should rely on certificate-of-analysis information when available. Degradation may appear as color change, precipitate, or decreased chromatographic purity.
SR9009 is a synthetic small molecule developed as a REV-ERB agonist. It binds to REV-ERBα and REV-ERBβ, nuclear receptors that help regulate circadian rhythms and metabolic gene expression. In cell and animal studies, the compound alters lipid and glucose handling and influences skeletal muscle oxidative capacity. Its exact effects in humans remain largely uncharacterized because controlled clinical trials have not been reported. The molecule is frequently described in preclinical literature as a metabolic modulator.
Research interest in SR9009 grew from studies showing improved running endurance in mice after short treatment periods. Those experiments linked the compound to increased mitochondrial content and fatty acid oxidation in muscle, but the findings come from animal models and specific dosing schedules. Independent replication has been limited, and the pathways connecting REV-ERB activation to exercise performance are still being mapped. Whether similar responses occur in humans is an open question.
Research interest in SR9009 grew from studies of circadian biology and metabolic disease. Preclinical reports describe effects on exercise capacity, muscle metabolism, and blood lipid levels in rodents, but these findings come from controlled laboratory settings. The compound has low oral bioavailability in animals, which limits systemic exposure after swallowing. Investigators often use injected routes in experiments to achieve measurable plasma concentrations. Human clinical data are sparse, no approved therapeutic product exists, and whether animal effects translate to humans remains an open question.
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.
== Reaction == Penning ionization refers to the interaction between an electronically excited gas-phase atom G* and a target molecule M. The collision results in the ionization of the molecule yielding a cation M+●, an electron e−, and a neutral gas molecule, G, in the ground state. Penning ionization occurs via formation of a high energy collision complex, evolving toward the formation of a cationic species, by ejecting a high energy electron.
In Peru, the Incas subsisted on maize in the lowlands and potatoes at higher altitudes. They also used seeds from quinoa, supplementing their diet with peppers, tomatoes, and avocados. In ancient China, rice was the staple crop in the south and wheat in the north, the latter made into dumplings, noodles, and pancakes. Vegetables used to accompany these included yams, soybeans, broad beans, turnips, spring onions, and garlic. The diet of the ancient Egyptians was based on bread, often contaminated with sand which wore away their teeth. Meat was a luxury but fish was more plentiful. These were accompanied by a range of vegetables including marrows, broad beans, lentils, onions, leeks, garlic, radishes, and lettuces. The mainstay of the ancient Greek diet was bread, and this was accompanied by goat's cheese, olives, figs, fish, and occasionally meat. The vegetables grown included onions, garlic, cabbages, melons, and lentils. In ancient Rome, a thick porridge was made of emmer wheat or beans, accompanied by green vegetables but little meat, and fish was not esteemed. The Romans grew broad beans, peas, onions and turnips and ate the leaves of beets rather than their roots.
From then, Alicent's party was known as the "greens" and Rhaenyra's supporters were labeled the "blacks". At the great ceremonial tourney on that day, Viserys and Daemon reunited after several years apart, as Daemon handed Viserys his crown from the Stepstones. The reunion lasted only for six months, as Viserys exiled Daemon once again for reasons unclear, though Septon Eustace claims that Daemon had seduced Rhaenyra and took her maidenhead. Viserys attempted to stabilize relations between the blacks and greens through various gatherings and respective apologies to each other, asserting that he loved Rhaenyra and Alicent equally. In 113 AC, Viserys attempted to find a betrothal for Rhaenyra, believing that the time was right for her to marry. Following the advice of his council, Viserys betrothed her to Laenor Velaryon as a way of stabilizing his tense relationship with Lord Corlys Velaryon. Rhaenyra did not want to marry Laenor, but accepted the match when Viserys threatened to change the order of succession should she refuse. The two married in 114 AC, though it is rumored that they never had their marriage consummated as Laenor was rumored to be homosexual. Rhaenyra gave birth to her sons Prince Jacaerys ("Jace"), Prince Lucerys ("Luke"), and Prince Joffrey Velaryon in 114, 115, and 117 AC while Alicent gave birth to her third son Prince Daeron Targaryen in 114 AC, shortly after Jace.
Office of AIDS Research Office of Research on Women's Health Office of Disease Prevention Sexual and Gender Minority Research Office Tribal Health Research Office Office of Program Evaluation and Performance The Agency Intramural Research Integrity Officer "is directly responsible for overseeing the resolution of all research misconduct allegations involving intramural research, and for promoting research integrity within the NIH Office of Intramural Research (OIR)." There is a Division of Extramural Activities, which has its own Director. The Office of Ethics has its own Director, as does the Office of Global Research.
=== N05CM Other hypnotics and sedatives === N05CM01 Methaqualone N05CM02 Clomethiazole N05CM03 Bromisoval N05CM04 Carbromal N05CM05 Scopolamine N05CM06 Propiomazine N05CM07 Triclofos N05CM08 Ethchlorvynol N05CM10 Hexapropymate N05CM11 Bromides N05CM12 Apronal N05CM13 Valnoctamide N05CM15 Methylpentynol N05CM16 Niaprazine N05CM18 Dexmedetomidine N05CM20 Diphenhydramine N05CM22 Promethazine N05CM25 Magnesium aspartate hydrobromide N05CM26 Magnesium glutamate hydrobromide N05CM27 Doxylamine
Sources: en.wikipedia.org
=== Film and television === Six months prior to his graduation from Guildhall, McGregor began a leading role in Dennis Potter's six-part Channel 4 series Lipstick on Your Collar (1993). He then starred in the BBC adaptation of Scarlet and Black (also 1993) with Rachel Weisz and made his film debut in Bill Forsyth's Being Human (1994). For his role in the thriller Shallow Grave (also 1994), he won an Empire Award. The film was his first collaboration with director Danny Boyle. He had a major role in the 1996 Channel 4 comedy-drama film Brassed Off, written and directed by Mark Herman. His international breakthrough followed with the role of heroin addict Mark Renton in Boyle's Trainspotting (1996), an adaptation of Irvine Welsh's novel of the same name. In 1998, McGregor played the male romantic lead role in the British film Little Voice, and rockstar Curt Wild in the film Velvet Goldmine directed by Todd Haynes. He was cast as the young Obi-Wan Kenobi in the Star Wars prequel trilogy, released between 1999 and 2005. Kenobi was originally played by Alec Guinness in the first Star Wars trilogy. McGregor's uncle, Denis Lawson, had played Wedge Antilles in the original trilogy. While the prequels received mixed reviews, McGregor's performance was well received. McGregor said making the prequels was difficult, as he had to act mostly against green screens and the dialogue was "not exactly Shakespeare". He also stated that the negative reaction to the films had been difficult.
Highly refractory woods These woods are slow and difficult to dry if the final product is to be free from defects, particularly cracks and splits. Examples are heavy structural timbers with high density such as ironbark (Eucalyptus paniculata), blackbutt (E. pillularis), southern blue gum (E. globulus) and brush box (Lophostemon cofertus). They require considerable protection and care against rapid drying conditions for the best results. Moderately refractory woods These timbers show a moderate tendency to crack and split during seasoning. They can be seasoned free from defects with moderately rapid drying conditions (i.e. a maximum dry-bulb temperature of 85 °C can be used). Examples are Sydney blue gum (E. saligna) and other timbers of medium density, which are potentially suitable for furniture. Non-refractory woods These woods can be rapidly seasoned to be free from defects even by applying high temperatures (dry-bulb temperatures of more than 100 °C) in industrial kilns. If not dried rapidly, they may develop discolouration (blue stain) and mould on the surface. Examples are softwoods and low density timbers such as Pinus radiata.
"That way," Castro recounted on another occasion, "while the South African troops were being bled slowly dry in Cuito Cuanavale, down in the southwest...40,000 Cuban soldiers...backed by about 600 tanks, hundreds of artillery pieces, 1,000 anti-aircraft weapons, and the daring MiG-23 units that took over the skies, advanced towards the Namibian border, ready to sweep away the South African forces". As the Cuban brigades advanced, they accumulated thousands of PLAN insurgents, who departed their bases to join the offensive. The presence of so many Cuban troops effectively resuscitated PLAN's sagging fortunes, as it curtailed new South African military initiatives against the insurgents not only in Angola but South West Africa as well. Firstly, the region being occupied by the Cubans just north of the border was the same territory the SADF had monitored and patrolled for almost a decade in order to prevent PLAN infiltration into Ovamboland. Secondly, all South African units near the border had ceased routine counter-insurgency operations while they were being mobilised to resist a potential Cuban invasion. Matters were complicated further when the Cubans formed three joint battalions with PLAN fighters, each with its own artillery and armoured contingents. Due to the integration of the insurgents with Cuban personnel at the battalion level, South African patrols found it impossible to engage PLAN in Angola without risking a much larger confrontation involving aggressive and well-armed Cuban troops.
nucleus pl. nuclei A large spherical or lobular organelle surrounded by a dedicated membrane which functions as the main storage compartment for the genetic material of eukaryotic cells, including the DNA comprising chromosomes, as well as the site of RNA synthesis during transcription. The vast majority of eukaryotic cells have a single nucleus, though some cells may have more than one nucleus, either temporarily or permanently, and in some organisms there exist certain cell types (e.g. mammalian erythrocytes) which lose their nuclei upon reaching maturity, effectively becoming anucleate. The nucleus is one of the defining features of eukaryotes; the cells of prokaryotes such as bacteria lack nuclei entirely.
Sources: en.wikipedia.org
Research-grade SR9009 is typically stored frozen at about minus twenty degrees Celsius, protected from light and moisture. Stock solutions are often kept in aliquots to avoid repeated freeze-thaw cycles. Specific storage conditions should follow the supplier's documentation.
Liquid chromatography with tandem mass spectrometry is widely used to detect and confirm SR9009 in laboratory samples. The technique offers high sensitivity and can distinguish the target compound from related substances. Nuclear magnetic resonance and ultraviolet detection may support identity and purity checks.
Online products labeled as SR9009 may vary in identity, purity, and actual content. Independent testing helps confirm that a sample matches its label and does not contain unexpected contaminants. This is important for reproducible research and for interpreting experimental results.
Legality depends on the country and the intended use. In many places it is not approved as a medicine and may be sold only as a research chemical. Importation or possession can be restricted, and sports organizations prohibit it.