This is a working overview of anti-doping, written for readers who want more than a one-paragraph summary but less than a textbook.
This page was last updated on 2025-08-19 and is reviewed periodically as new material appears.
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.
Laboratory identification of SR9009 typically relies on chromatographic separation coupled to mass spectrometry, often with ultraviolet detection as a secondary check. Nuclear magnetic resonance spectroscopy can confirm molecular structure when a reference standard is available. Because many suppliers sell the compound as a research chemical, independent identity testing is important for experimental reproducibility. A single retention time is not sufficient proof of identity, especially when related compounds may be present. Purity assessments usually report a percentage based on area normalization.
Analytical methods for SR9009 typically rely on liquid chromatography coupled with tandem mass spectrometry. The technique can separate the parent compound from related substances and detect low concentrations in biological matrices. Urine and blood are common samples in anti-doping testing, while in vitro studies may use cell culture media. Rapid metabolism and low expected concentrations make method validation important for reliable identification. Exact metabolite patterns can vary by species and are not fully mapped.
Regulatory treatment of SR9009 reflects its investigational status. The compound has no approved human therapeutic indication, and sports authorities prohibit its use. It appears on anti-doping lists as a non-approved substance or metabolic modulator, depending on the list version. Products sold online as research chemicals are not quality-controlled medicines, so their identity and purity can differ from the label. Such products may also contain unlisted compounds, which complicates both testing and safety assessment.
| Property | Value | Notes |
|---|---|---|
| Appearance | White to off-white powder | Visual inspection is not sufficient for identity. |
| Solubility | Soluble in DMSO and ethanol | Low solubility in water; stock solutions use organic solvent. |
| Storage | -20°C, desiccated, protected from light | Limits hydrolysis and photodegradation. |
| Analytical method | HPLC-UV/MS | Used for identity and purity assessment. |
| Synonyms | SR9009, Stenabolic | Naming varies by supplier. |
At the molecular level, SR9009 binds REV-ERBα and REV-ERBβ and alters their repressive activity on target genes. These nuclear receptors help regulate the circadian clock, lipid synthesis, glucose metabolism, and inflammatory pathways. By changing transcription, the compound can shift the timing or magnitude of downstream metabolic processes in model systems. It does not act through androgen receptors or adenosine receptors, which distinguishes it from several substances sold for athletic performance. Whether the same transcriptional changes occur in humans at tolerable exposures remains an open question because controlled human studies are lacking.
Preclinical reports describe effects on exercise endurance, mitochondrial content, and lipid profiles in rodents, but these findings come from specific experimental conditions. Many studies use high doses or delivery methods that may not translate directly to human use. SR9009 has been reported to have low oral bioavailability and a short half-life, which complicates interpretation of oral dosing studies. It is not established as safe or effective for any indication. Literature discussions often separate its pharmacological mechanism from unverified claims made in fitness and supplement markets.
SR9009 is a synthetic small molecule studied as an agonist of the nuclear receptors REV-ERBα and REV-ERBβ. It is not an approved medicine and has no established human therapeutic use. The compound appears in scientific literature as a tool for probing circadian and metabolic regulation. Online sellers often label it as a research chemical, sometimes using the nickname Stenabolic. Its chemical identity is distinct from selective androgen receptor modulators, stimulants, and peroxisome proliferator-activated receptor delta agonists. Researchers use it mainly in cell and animal experiments.
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.
Detection of SR9009 in biological samples usually employs liquid chromatography coupled with tandem mass spectrometry. This method can identify the parent compound and sometimes metabolites in urine or blood. Because exposure can be low and clearance may be rapid, sample timing and limits of detection matter. Laboratories validate assays for sensitivity and specificity. Results are interpreted alongside chain-of-custody and quality-control records. Urine is the common matrix for anti-doping analysis, while blood may be used in research settings.
Handling recommendations for SR9009 in a laboratory setting include storing the solid at low temperature, protected from light and moisture. The compound is often dissolved in dimethyl sulfoxide or ethanol for experiments. Solutions should be prepared with appropriate personal protective equipment and disposed of according to local rules. Stability data for long-term storage are limited, so stock solutions are typically kept cold and used within defined periods. Records of preparation date and concentration support reproducibility.
Regulatory treatment of SR9009 varies by country and context. It is not approved as a therapeutic drug by agencies such as the United States Food and Drug Administration or the European Medicines Agency. Sports authorities list it as a prohibited substance; the World Anti-Doping Agency classifies it among hormone and metabolic modulators. Legal status for personal possession or sale differs across jurisdictions, and some countries may restrict it under analog or research chemical laws. Buyers who seek verified material often rely on independent laboratory testing because online product labels may not match contents.
Laboratory samples of SR9009 are typically handled as research chemicals rather than pharmaceuticals. Suppliers usually state that the material is for research use only and not for human or veterinary administration. Storage recommendations generally call for a freezer at approximately −20 °C, protection from light, and a desiccated environment. The solid is often described as a white to off-white powder. Solubility is commonly reported in organic solvents such as dimethyl sulfoxide and ethanol, with low solubility in water.
The pancreas is a major organ functioning as an accessory digestive gland in the digestive system. It is both an endocrine gland and an exocrine gland. The endocrine part secretes insulin when the blood sugar becomes high; insulin moves glucose from the blood into the muscles and other tissues for use as energy. The endocrine part releases glucagon when the blood sugar is low; glucagon allows stored sugar to be broken down into glucose by the liver in order to re-balance the sugar levels. The pancreas produces and releases important digestive enzymes in the pancreatic juice that it delivers to the duodenum. The pancreas lies below and at the back of the stomach. It connects to the duodenum via the pancreatic duct which it joins near to the bile duct's connection where both the bile and pancreatic juice can act on the chyme that is released from the stomach into the duodenum. Aqueous pancreatic secretions from pancreatic duct cells contain bicarbonate ions which are alkaline and help with the bile to neutralise the acidic chyme that is churned out by the stomach. The pancreas is also the main source of enzymes for the digestion of fats and proteins. Some of these are released in response to the production of cholecystokinin in the duodenum. (The enzymes that digest polysaccharides, by contrast, are primarily produced by the walls of the intestines.) The cells are filled with secretory granules containing the precursor digestive enzymes. The major proteases, the pancreatic enzymes which work on proteins, are trypsinogen and chymotrypsinogen. Elastase is also produced.
In order to maintain the cell membrane potential, cells keep a low concentration of sodium ions and high levels of potassium ions within the cell (intracellular). The sodium–potassium pump mechanism moves 3 sodium ions out and moves 2 potassium ions in, thus, in total, removing one positive charge carrier from the intracellular space (see § Mechanism for details). In addition, there is a short-circuit channel (i.e. a highly K-permeable ion channel) for potassium in the membrane, thus the voltage across the plasma membrane is close to the Nernst potential of potassium.
=== Agonists === Non-selective Galanin Galanin 1-15 fragment Galanin-like peptide - agonist at GAL1 and GAL2 but not GAL3 Galmic Galnon NAX 5055 D-Gal(7-Ahp)-B2 GAL1 selective M617 GAL1/2 selective M1154 - has no GalR3 interaction GAL2 selective Galanin 2-11 amide - also called AR-M 1896, anticonvulsant in mice, CAS# 367518–31–8 M1145 - selective compared to both GalR1 and GalR3 M1153 - selective compared to both GalR1 and GalR3 CYM 2503 (positive allosteric modulator)
Sources: en.wikipedia.org
There are three known stable isotopes of oxygen (8O): 16O, 17O, and 18O. Radioisotopes are known from 11O to 28O (particle-bound from mass number 13 to 24), and the most stable are 15O with half-life 122.27 seconds and 14O with half-life 70.62 seconds. All remaining radioisotopes are even shorter in lifetime. The four heaviest known isotopes (up to 28O) decay by neutron emission to 24O, whose half-life is 77 milliseconds; 24O, along with 28Ne, have been used in the model of reactions in the crust of neutron stars. The most common decay mode for isotopes lighter than the stable isotopes is β+ decay to nitrogen, and the most common mode after is β− decay to fluorine.
The vorticity equation of fluid dynamics describes the evolution of the vorticity ω of a particle of a fluid as it moves with its flow; that is, the local rotation of the fluid (in terms of vector calculus this is the curl of the flow velocity). The governing equation is:where D/Dt is the material derivative operator, u is the flow velocity, ρ is the local fluid density, p is the local pressure, τ is the viscous stress tensor and B represents the sum of the external body forces. The first source term on the right hand side represents vortex stretching. The equation is valid in the absence of any concentrated torques and line forces for a compressible, Newtonian fluid. In the case of incompressible flow (i.e., low Mach number) and isotropic fluids, with conservative body forces, the equation simplifies to the vorticity transport equation:
Individual franchisees took advantage of the AmeriKing failure; one of BK's regional owners, Miami-based Al Cabrera, purchased 130 stores located primarily in the Chicago and the upper mid-west region, from the failed company for a price of $16 million, approximately 88 percent of their original value. The new company, which started out as Core Value Partners and eventually became Heartland Foods, also purchased 120 additional stores from distressed owners and revamped them. The resulting purchases made Cabrera the largest minority franchisee of Burger King, and Heartland one of the company's top franchises. By 2006, the company was valued at over $150 million, and was sold to New York–based GSO Capital Partners. Other purchasers included a three-way group of NFL athletes Kevin Faulk, Marcus Allen, and Michael Strahan who collectively purchased 17 stores in the cities of Norfolk and Richmond, Virginia; and Cincinnati-based franchisee Dave Devoy, who purchased 32 AmeriKing stores. After investing in new decor, equipment, and staff retraining, many of the formerly failing stores showed growth approaching 20 percent. As part of 3G's restructuring plan, the company decided to divest itself of its corporate owned locations by re-franchising them to private owners and become a 100% franchised operation by the end of 2013. The project, which began in April 2012, saw the company divest corporate-owned locations in Florida, Canada, Spain, Germany, and other regions. The move gave the company a Q3, 2013 profit of US$68.2 million over the same quarter, 2012 of US$6.6 million.
Petroleum is a fossil fuel derived from fossilized organic materials, such as zooplankton and algae. Vast amounts of these remains settled to sea or lake bottoms where they were covered in stagnant water (water with no dissolved oxygen) or sediments (such as mud and silt) faster than they could decompose aerobically. Approximately 1 m below this sediment, water oxygen concentration was low, below 0.1 mg/L, and anoxic conditions existed. Temperatures also remained constant. As further layers settled into the sea or lake bed, intense heat and pressure built up in the lower regions. This process caused the organic matter to change, first into a waxy material known as kerogen (found in various oil shales around the world) and then with more heat into liquid and gaseous hydrocarbons via a process known as catagenesis. Formation of petroleum occurs from hydrocarbon pyrolysis in a variety of mainly endothermic reactions at high temperatures or pressures, or both. These phases are described in detail below.
Sources: en.wikipedia.org
Spironolactone "acts at the basolateral side of the upper-distal tubule as well as in the collecting tubule," and does not have glucocorticoid-like effects at these specific sites; it can sometimes be prescribed as an alternative to glucocorticoids for patients with Glucocorticoid-Remediable Aldosteronism characterized by aldosterone excess, In patients "receiving spironolactone, there was a significant positive correlation between the change in cortisol and the change in HbA1c (r = 0.489, P = .003)." Patients taking spironolactone must be monitored for side effects including dizziness, headache, fatigue, diarrhea, hypertriglyceridemia and elevated liver enzymes. Other activities of spironolactone may include very weak interactions with the estrogen and progesterone receptors and agonism of the pregnane X receptor. These activities could contribute to the menstrual irregularities and breast side effects of spironolactone and to its drug interactions, respectively.
=== 27 May === A spokeswoman for the German Defence Ministry confirmed that Ukraine had formally asked to be supplied with the Taurus KEPD 350 cruise missile. In Kharkiv Oblast, a woman was killed and another civilian was injured by Russian shelling in Kupiansk. Mikhail Vedernikov, Governor of Russia's Pskov Oblast, claimed that two drones struck an administrative building for a nearby oil pipeline, causing an explosion. No casualties were reported, however the building was damaged. The attack occurred less than ten kilometres from the Belarus border. In Kursk Oblast, a construction worker was reported to have been killed by Ukrainian shelling near the village of Plekhovo, a few kilometers from the international border. Another civilian, a security guard was killed by shelling in Shebekino, Belgorod Oblast. The Russian Defence Ministry claimed that its forces had intercepted two Storm Shadow missiles, 19 drones and several HIMARS and HARM missiles from Ukraine in the past 24 hours. The German Foreign Ministry confirmed that hundreds of its educational and cultural workers, including employees at the German school in Moscow and at the local branch of the Goethe Institute were to be expelled from Russia starting in June after it imposed a limit on the number of German employees in retaliation for the expulsion of Russian diplomats and staff from Germany.
AABB publishes a variety of other materials for the blood and biotherapies field, including the standards by which it accredits institutions. Since 1953, the organization has also operated a National Blood Exchange to facilitate transfers of blood products during shortages or when rare blood types are required. On June 1, 2018, Debra BenAvram, FASAE, CAE, became the association's chief executive officer (CEO).
Trimipramine is a very potent antihistamine; it has the third highest affinity for the H1 receptor (Ki = 0.27 nM) after doxepin (Ki = 0.24 nM) and mirtazapine (Ki = 0.14 nM) among the TCAs and tetracyclic antidepressants (TeCAs). The TeCA mianserin (Ki = 0.40) and the TCA amitriptyline (Ki = 1.0) are also very potent H1 receptor antagonists, whereas other TCAs and TeCAs are less potent. These TCAs and TeCAs, including trimipramine, are far more potent than the standard antihistamine diphenhydramine (approximately 800 times for doxepin and 250 times for trimipramine), and are among the most potent antihistamines available. Trimipramine is also an antagonist of the H2 receptor with lower potency and has been found to be effective in the treatment of duodenal ulcers.
Over the November 2016 Thanksgiving holiday weekend, President-Elect Donald Trump tweeted that he was in talks with Carrier Management to keep the factory in Indiana and not move to Mexico. On November 30, 2016, Carrier announced that it had negotiated an agreement with President-elect Trump and Vice President-elect Mike Pence to continue manufacturing gas furnaces in Indianapolis, in addition to retaining engineering and headquarters staff, preserving more than 1,000 jobs in Indianapolis. The agreement included a state incentive package of about $7 million over 10 years. The number of jobs saved was later revised down to 800. In May 2017, as part of their previously announced plan, Carrier told the state of Indiana that it will cut 632 jobs from its Indianapolis factory. Layoffs began at the end of July 2017, with each worker receiving one week's salary for each year of employment, education and job training, plus 6 months of health insurance as part of the severance package. The New York Times reported on August 10, 2018, that Carrier's Indianapolis furnace plant was plagued by low morale and absenteeism because "employees share a looming sense that a factory shutdown is inevitable — that Carrier has merely postponed the closing until a more politically opportune moment." On November 26, 2018, United Technologies announced that it would spin off UTC Climate, Controls & Security as an independent company known as Carrier Global Corporation. In April 2020, United Technologies announced that the separation and spin-off of Carrier had been completed.
Sources: en.wikipedia.org
Liquid chromatography with mass spectrometry is a common approach. Ultraviolet detection and nuclear magnetic resonance can support identification when suitable standards are available.
The solid is generally kept cold, dry, and protected from light. Solutions are often frozen in single-use aliquots to reduce repeated freeze-thaw cycles.
It indicates a material sold for laboratory study, not for human use. The label does not guarantee pharmaceutical purity, sterility, or regulatory approval.
No. It is an investigational compound without approved therapeutic indications. It is sold for research purposes only in many jurisdictions.