The short version of circadian clock fits in a sentence. The long version — which is the one that helps — is below.
This page was last updated on 2025-09-25 and is reviewed periodically as new material appears.
Regulatory treatment of SR9009 varies by country and region. It is not approved as a pharmaceutical, and several jurisdictions restrict its sale for human consumption. Some authorities classify it as a research chemical, a prescription-only substance, or a prohibited performance-enhancing agent in sport. Purchasers may encounter certificates of analysis, but these documents do not guarantee identity, purity, or legality. In research settings, institutional safety reviews and controlled procurement help ensure that materials are handled under appropriate oversight. The absence of harmonized rules means that legal status can change and requires verification.
Analytical identification of SR9009 typically relies on liquid chromatography coupled with tandem mass spectrometry. In biological samples, researchers first separate the compound from matrix components using protein precipitation, liquid-liquid extraction, or solid-phase extraction. High-performance liquid chromatography with ultraviolet detection and nuclear magnetic resonance spectroscopy can support structural confirmation of reference materials. Because SR9009 is a small, relatively lipophilic molecule, reverse-phase columns and acidic mobile phases are common. Laboratories often include isotope-labeled internal standards to improve quantification and to correct for ion suppression.
Stability depends on physical form, temperature, light exposure, and solvent. Solid SR9009 is generally stored cold and dry, with protection from light to limit degradation. Dimethyl sulfoxide stocks are common for laboratory work, but repeated freeze-thaw cycles can reduce compound integrity. Aqueous solutions may be less stable than organic stocks, and the ethyl ester in the structure can be susceptible to hydrolysis under certain conditions. Researchers typically validate storage conditions and recheck purity before quantitative experiments, especially when using archived material.
In rodent studies, SR9009 has been reported to increase mitochondrial content in skeletal muscle and improve exercise endurance under some conditions. These findings led to popular descriptions such as an exercise mimetic, although that term oversimplifies the biology. Effects vary by dose, timing, tissue, and model. The compound's influence on circadian pathways means that time of administration can matter in experiments. Whether similar metabolic changes occur in humans remains largely unexplored in controlled published trials.
Pharmacokinetic data for SR9009 are limited in published literature. Some reports indicate low oral bioavailability and rapid clearance in animals, which complicates interpretation of exposure and effect. Researchers often use injected routes in preclinical work to achieve measurable systemic levels. Analytical studies rely on mass spectrometry to detect the parent compound and its metabolites. Questions about tissue distribution, active metabolites, and long-term consequences remain open. Species differences in metabolism can affect observed half-life and target engagement.
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 and metabolic gene expression. In laboratory experiments, SR9009 binds these receptors and alters transcription of genes involved in lipid handling, glucose metabolism, and mitochondrial function. It is not a naturally occurring compound and has no approved therapeutic use. Research interest stems from its ability to modify energy metabolism in cells and animal models.
| Property | Value | Notes |
|---|---|---|
| Common synonyms | SR9009; Stenabolic | Nickname is not a chemical name. |
| Typical analytical method | LC-MS/MS | Often with isotope-labeled internal standard. |
| Storage temperature | -20 °C | Desiccated and protected from light. |
| Solution stability | DMSO stock; avoid freeze-thaw | Store at -20 to -80 °C. |
| Regulatory status | Not approved; varies by country | May be restricted as research chemical. |
Scientific discussion of SR9009 often separates animal evidence from human anecdote. Rodent studies provide controlled data on endurance, metabolism, and gene expression, but they use specific strains, doses, and treatment durations. Human reports are mostly uncontrolled and cannot establish cause and effect. Open questions include oral bioavailability, tissue distribution, metabolic stability, and long-term effects. Review articles generally call for more rigorous pharmacokinetic and safety research before any clinical use could be considered.
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.
SR9009 is frequently discussed alongside other REV-ERB ligands, including synthetic agonists and natural heme-related molecules. Its selectivity for REV-ERB over related nuclear receptors has been measured in binding and reporter assays, though off-target activity at higher concentrations is possible. The compound is prohibited in sport by the World Anti-Doping Agency, and it is not approved for any medical use in major jurisdictions. Products sold online may be labeled as research chemicals, and their identity and purity are not guaranteed by regulatory review.
SR9009 is a synthetic small molecule that acts on the nuclear receptors REV-ERBα and REV-ERBβ. These receptors are part of the circadian clock machinery and normally repress transcription of certain target genes. In laboratory research, SR9009 is used as a chemical tool to study how REV-ERB activity influences metabolism, inflammation, and daily biological rhythms. The compound is not an approved medicine, and its effects in humans remain largely uncharacterized. It is often described as an investigational agent rather than a therapeutic product.
Most published work on SR9009 consists of preclinical studies. It is widely sold as a research chemical, a category that does not imply safety, efficacy, or pharmaceutical-grade quality. Sports anti-doping organizations have listed SR9009 as a prohibited substance, and its presence in an athlete sample can lead to sanctions. Legal status differs by country; in several jurisdictions it is not approved for human consumption and may be treated as an unapproved new drug.
SR9009 is a synthetic small molecule studied as an agonist of the nuclear receptors REV-ERBα and REV-ERBβ. It is not a steroid, peptide, or natural hormone. In scientific literature, it appears under the code SR9009 and in non-scientific contexts as Stenabolic. The compound was identified through chemical screening efforts aimed at targeting circadian clock components. Its status remains investigational, and no regulatory agency has approved it as a human medicine.
REV-ERB proteins help regulate daily cycles in gene expression, including genes tied to lipid and glucose metabolism. SR9009 binds these receptors and alters their activity in cell and animal experiments. Consequences observed in rodents include changes in skeletal muscle oxidative capacity, blood lipid levels, and exercise performance. The precise chain from receptor occupancy to whole-body effects is still an active area of study. Human responses cannot be assumed from rodent data.
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.
SR9009 is not approved as a medicine by major regulatory agencies. It is commonly sold as a research chemical, a category that may fall outside customary drug approval and quality rules. In sports, the World Anti-Doping Agency lists SR9009 as a prohibited substance. Athletes who use it can face sanctions if it is detected in a sample. Legal status varies by country, and importation may be restricted. Enforcement practices differ across borders.
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.
Firstly, the hydroxylation of compounds begins by cytochrome P450 enzymes. Secondly, hydrophilic moieties join up to the compounds in order to increase water solubility. As a result, the excretion through urine occurs and compounds can be removed. Either CYP4A or CYP4F are the enzymes involved in the downstream metabolism of 1-deoxySLs. It is not yet known which one takes place in the process but, it is more likely to be CYP4F as in mouse experiments this enzyme is responsible for 1-deoxySLs formation.
44. Adv Gerontol. 2004;13:90-3. [Effect of epitalon on the immunity and hemostasis in hypophysectomized chicken and old hens]. [Article in Russian] Kuznik BI, Pateiuk AV, Khavinson VKh, Malinin VV. Neonatal hypophysectomy in chicken, as well as that in old hen has been established to entail in 1,5 months after surgery cellular and humoral immunity disturbances, pronounced hypercoagulation and fibrinolysis depression. Administration of Epitalon (Ala-Glu-Asp-Gly) to a large extent eliminates revealed shifts. This effect appeared to be stronger in neonatally hypophysectomized chicken than in old hens.
Research into virtual reality (VR) hardware and software started as early as 1968 by Ivan Sutherland and his student Bob Sproull, but most equipment was too expensive for consumer use, and its use for games was limited. The first VR head mounted display was connected to a computer. In the late 1980s, Jaron Lanier and Thomas G. Zimmerman, former programmers for Atari, Inc., began developing hardware under the name VPL Research, with Lanier coining the term "virtual reality" for their products. One of VPL's products was the VPL DataGlove; a glove that sensed the user's finger movement and translated it into computer input. The idea inspired engineers at Abrams/Gentile Entertainment (AGE) to work with Mattel and Nintendo to build a low-cost version of the DataGlove to work with the Nintendo Entertainment System (NES), omitting much of the technical sophistication and movement sensitivity of the DataGlove as to achieve a reasonable consumer cost. The Power Glove was released in 1989. The games Super Glove Ball and Bad Street Brawler were specifically designed to use the Power Glove, while other NES games could be played using the Power Glove by mapping its output to various controls. About one million Power Glove units were sold before Mattel discontinued it in 1990. Its low cost compared to the DataGlove and other similar gloves led academics to buy the unit for their own research.
===== Czech Republic ===== As of May 2023, the State Agricultural and Food Inspection of the Czech Republic is putting together broad regulations regarding a ban on CBD products. They will make it illegal to sell products containing cannabidiol and other cannabinoids derived from hemp, as a result of EU Novel Food Regulation. In case of Czech Republic, European Industrial Hemp Association has submitted an official request to the Czech Republic to recognize natural hemp extracts with cannabinoids as traditional food.
Sources: en.wikipedia.org
==== Peripheral and autonomic nervous systems ==== An alternative hypothesis to nociplastic pain views fibromyalgia as a stress-related dysautonomia with neuropathic pain features. This view highlights the role of autonomic and peripheral nociceptive nervous systems in the generation of widespread pain, fatigue, and insomnia. The description of small fiber neuropathy in a subgroup of fibromyalgia patients supports the disease neuropathic-autonomic underpinning. However, others claim that small fiber neuropathy occurs only in small groups of those with fibromyalgia. Some suggest that fibromyalgia is caused or maintained by decreased vagal tone, as indicated by low heart rate variability, signaling a heightened sympathetic response. Accordingly, several studies show that clinical improvement is associated with an increase in heart rate variability. Some examples of interventions that increase the heart rate variability and vagal tone are meditation, yoga, mindfulness, and exercise.
Distillation of chemicals such as in petroleum refining is done in towers or columns with perforated trays. Vapor from the low boiling fractions bubbles upward through the holes in the trays in contact with the down flowing high boiling fractions. The concentration of low boiling fraction increases in each tray up the tower as it is "stripped". The low boiling fraction is drawn off the top of the tower and the high boiling fraction drawn from the bottom. The process in the trays is a combination of heat transfer and mass transfer. Heat is supplied at the bottom, known as a "reboiler" and cooling is done with a condenser at the top.
Javits (1952), former ambassador and permanent U.S. representative to the Conference on Disarmament in Geneva 2001–2003; U.S. permanent representative to the Organisation for the Prohibition of Chemical Weapons 2003–2009 James D. Theberge (1952), former U.S. ambassador to Chile and Nicaragua G. Norman Anderson (1954), former U.S. ambassador to Sudan David J. Bardin (1954), deputy administrator of the Federal Energy Administration; commissioner of the New Jersey Department of Environmental Protection William Haddad (1954), political operative, lobbyist, and journalist, Peace Corps founding official, aide to the Kennedy family, and grandson-in-law of Franklin D. Roosevelt Richard E. Benedick (1955), president emeritus of the National Council for Science and the Environment, ambassador, and chief U.S. negotiator to the Montreal Protocol John L. Hirsch (1957), U.S. ambassador to Sierra Leone 1995–1998 Morton Halperin (1958), deputy assistant secretary of defense, director of policy planning for the U.S. State Department, and member of Richard Nixon's Enemies List Shelby Brewer (1959), assistant secretary of energy for nuclear energy 1981–1984 Benjamin Huberman (1959), acting director of the Office of Science and Technology Policy; acting science advisor to the president in 1981 Pat Mullins (1959), chairman of the Republican Party of Virginia Constantine Menges (1960), national security aide to Ronald Reagan James E.
=== Alternative medicine === There is moderate evidence that honey is more effective than antiseptic followed by gauze for healing wounds infected after surgical operations. There is a lack of quality evidence relating to the use of honey on other types of wounds, such as minor acute wounds, mixed acute and chronic wounds, pressure ulcers, Fournier's gangrene, venous leg ulcers, diabetic foot ulcers and Leishmaniasis.
Central Institute for Research on Buffaloes, Hisar, a publicly funded, institute for water buffalo research. It is located 170 kilometres (110 mi) from Delhi, at Hisar in the north Indian state of Haryana. It has a sub-campus, Bir Dosanjh, at Nabha. CIRB operates a nationwide network of 10 research centres working on breed improvement of the 7 main native breeds. CIRB, with over 20 laboratories for buffalo research, is the world's largest buffalo research institute with the widest range of breeds under study. With the aim of improving breeds and dissemination of information, CIRB has sold over 1,000 bulls, conducted ~200,000 artificial insemination in the field for the farmers' buffaloes with a 41% conception rate, distributed ~520,000 progeny tested frozen semen kits to 45,000 farmers and over 250 institutes, imparted training to several thousand farmers on advanced buffalo husbandry, and created the world's first online Buffalopedia in several languages. It has a large research partner network across India and the globe. It is the second institute to successfully clone a buffalo in 2016, after the first successful cloning was achieved by the National Dairy Research Institute, Karnal in 2010. In July 2017, the Indian Council of Agricultural Research ranked CIRB Hisar as India's number one Buffalo research institute for the year 2016–17. India has 58% the world's buffaloes and 35% of India's cattle are buffaloes. Buffalo milk is 70% of the total milk yield in India, with its national gross domestic product (GDP) share being larger than wheat and rice combined.
Sources: en.wikipedia.org
=== Bacterial nanocellulose === Some cellulose producing bacteria have also been used to produce nanocellulosic materials that are then referred to as bacterial nanocellulose. The most common examples being Medusomyces gisevii (the bacteria involved in the making of Kombucha) and Komagataeibacter xylinus (involve in the fabrication of Nata de coco), see bacterial cellulose for more details. This naming distinction might arise from the very peculiar morphology of these materials compared to the more traditional ones made of wood or cotton cellulose. In practice, bacterial nanocellulosic materials are often larger than their wood or cotton counterparts.
However, when P is on the circumcircle the sum of the distances from P to the nearest two vertices exactly equals the distance to the farthest vertex. A triangle is equilateral if and only if, for every point P in the plane, with distances PD, PE, and PF to the triangle's sides and distances PA, PB, and PC to its vertices,
The hot water supply hose of the umbilical is commonly 1⁄2 inch (13 mm) bore, and is connected to a supply manifold at the right hip of the suit with a set of valves which allow the diver to control flow to the front and back of the torso, and to the arms and legs, and to dump the supply to the environment if the water is too hot or too cold. The manifold distributes the water through the suit through perforated tubes. The hot-water suit is normally a one-piece neoprene wetsuit, fairly loose fitting, to fit over a neoprene undersuit, which can protect the diver from scalding if the temperature control system fails, with a zipper on the front of the torso and on the lower part of each leg. Gloves and boots are worn which receive hot water from the ends of the arm and leg hoses. If a full-face mask is worn, the hood may be supplied by a tube at the neck of the suit. Helmets do not require heating. The heating water flows out at the neck and cuffs of the suit through the overlap with gloves, boots, or hood.
Cyanuric acid or 1,3,5-triazine-2,4,6-triol is a chemical compound with the formula (CNOH)3. Like many industrially useful chemicals, this triazine has many synonyms. This white, odorless solid finds use as a precursor or a component of bleaches, disinfectants, and herbicides. In 1997, worldwide production was 160,000 tonnes (180,000 short tons; 350,000,000 lb).
2003 saw Helton involved in the closest NL batting race in history, as he hit .35849, while St. Louis Cardinals first baseman Albert Pujols edged him out by posting a .35871 batting average to win the batting crown. Helton also had 33 home runs, 117 RBI, 135 runs, 49 doubles and five triples. He won his fourth Player of the Month honor for April, when he hit .337 with six home runs, 27 RBI, 28 runs, 11 doubles and 24 walks. He also appeared in his fourth consecutive All-Star Game. During the 2004 season, Helton again finished second in the NL batting race, as he hit .347, while San Francisco Giants left fielder Barry Bonds hit .362. Helton also had 32 home runs and 96 RBI on the season. He became the first player in MLB history to hit at least .315 with 25 home runs and 95 RBI in each of his first seven full seasons in the majors. He became only the third player in MLB history to accomplish that feat during any seven-year stretch in a career (Lou Gehrig and Babe Ruth are the others). He set a franchise record by hitting at least 30 home runs in six consecutive seasons. Helton was named to his team-record fifth consecutive All-Star Game and won his third Gold Glove during the season. In 2005, Helton was placed on the disabled list (July 26 – August 9) for the first time in his career, missing time with a strained left calf muscle. He hit .320 with 20 home runs, 79 RBI, 92 runs, and 45 doubles for the season. He was under 1.000 in OPS (finished with .979 OPS) for the first time since 1999, and was also left off the NL All-Star roster for the first time since that same year.
Sources: en.wikipedia.org
The most common approach is liquid chromatography-tandem mass spectrometry, often after extraction from blood, urine, or tissue. Ultraviolet detection and nuclear magnetic resonance spectroscopy are used mainly for reference material characterization. Isotope-labeled internal standards improve accuracy.
Solid material is usually kept at -20 °C, desiccated, and protected from light. Dimethyl sulfoxide stocks should be stored cold and subjected to minimal freeze-thaw cycles. Aqueous solutions are generally less stable and should be prepared fresh when possible.
Legality depends on the country and the intended use. It is not an approved medicine, and some places restrict or ban sales for human consumption. Buyers should verify local rules and product documentation before procurement.
It is a synthetic research compound that activates REV-ERB nuclear receptors. It is not an approved drug or dietary supplement. Most information comes from cell and animal studies.