circadian clock is one of those subjects where the details matter more than the headlines. This page pulls together the background, the mechanisms, and the practical points readers ask about most.
Updated 2026-01-11. Numbers and descriptions here follow the published literature rather than marketing material.
Identity and purity of SR9009 samples are usually checked with chromatographic and spectrometric methods. High-performance liquid chromatography can separate the compound from related impurities, while mass spectrometry provides molecular mass confirmation. Nuclear magnetic resonance spectroscopy may be used for structural verification in research settings. No single method proves biological activity, and certificates of analysis should be reviewed alongside raw data. Independent testing is often needed because online products vary widely.
SR9009 stability depends on temperature, moisture, light, and solvent. Solid material is generally kept cool and dry, while solutions may require protection from repeated warming and cooling. Degradation can appear as color changes, precipitate, or new chromatographic peaks. Researchers should follow supplier instructions and their own stability data. Long-term storage conditions for human use have not been established because the compound lacks approved clinical formulation.
Because REV-ERB receptors are core clock components, SR9009 has been examined for effects on daily rhythms as well as metabolism. Research has explored whether the compound can shift or reinforce circadian gene expression in tissues such as liver and muscle. Some studies report improved metabolic markers in obese or diabetic mice, while others show context-dependent responses. Questions remain about which effects are direct, which are secondary to timing, and how they might differ across species.
SR9009 is a synthetic small molecule studied as an agonist of REV-ERB nuclear receptors. REV-ERB alpha and REV-ERB beta help regulate circadian rhythms and metabolic gene expression. In laboratory research, SR9009 has been used to probe how these receptors affect skeletal muscle, liver, and adipose tissue. The compound was identified in academic drug-discovery work and is often described in scientific literature by its chemical name and research code. It is not an approved medicine, and human clinical data remain limited or absent.
SR9009 binds REV-ERB receptors and alters their repressive activity on target genes. This action can change transcription of genes involved in lipid handling, glucose metabolism, and mitochondrial function. In rodent studies, treated animals have shown changes in muscle oxidative capacity and exercise performance, though effects vary by dose, duration, and model. The precise molecular steps connecting receptor binding to whole-body outcomes are still an active area of investigation. Findings in animals do not automatically translate to humans.
| Property | Value | Notes |
|---|---|---|
| Synonyms | SR9009; Stenabolic | Stenabolic is an informal name |
| Common form | Crystalline powder | Supplied in milligram to gram quantities |
| Long-term storage | -20 °C, desiccated, protected from light | Reduces degradation |
| Detection technique | LC-MS/MS | Common in anti-doping and research analysis |
| Regulatory status | Prohibited in sport by WADA | Not approved for human therapeutic use |
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.
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.
Tajima Beef: Tajima beef is beef from the Tajima region of Hyōgo Prefecture, and has a history of about 1,200 years. Kobe Beef: Kobe Beef is a brand given to the highest quality beef from Hyōgo Prefecture's Tajima cattle and has a history of about 170 years. Special Matsusaka Beef: Special Matsuzaka Beef (Tokusan Matsusaka Ushi) is a brand given to the highest quality virgin female beef from the Matsuzaka region of Mie Prefecture. The Matsusaka beef brand has a history of about 100 years. Yonezawa Beef: Yonezawa Beef (Yonezawa Gyu) is beef from virgin Japanese black female cattle in the Okitama region of Yamagata Prefecture and has a history of about 150 years. Maesawa Beef: Maesawa Beef is a brand given to the highest quality beef from the Maesawa area of Iwate Prefecture, and has a history of about 70 years. Miyazaki Beef: Miyazaki Beef is a brand of wagyu beef from Miyazaki Prefecture, and has often won the Wagyu Olympics in recent years. Ōmi Beef: Ōmi Beef is a wagyu beef brand from Shiga Prefecture with a history of about 400 years. Kagoshima Black Beef: Kagoshima Black Beef (Kagoshima Kuroushi) is a wagyu beef brand from Kagoshima Prefecture that won the recent Wagyu Olympics. Kumamoto Red Beef: Kumamoto Red Beef (Kuamoto Akaushi) is a wagyu beef from Kumamoto Prefecture, characterized by its lean meat. Hiba Beef: Hiba Beef is a brand of Japanese black cattle from Shobara City, Hiroshima Prefecture, with a history dating back to the Edo period. Hida Beef: Hida Beef is a Japanese beef from Gifu Prefecture and has a history of about 100 years.
The long passage up the heavily tidal Avon Gorge, which had made the port highly secure during the Middle Ages, had become a liability which the construction of a new "Floating Harbour" (designed by William Jessop) in 1804–1809 failed to overcome. Nevertheless, Bristol's population (61,000 in 1801) grew fivefold during the 19th century, supported by growing commerce. It was particularly associated with the leading engineer Isambard Kingdom Brunel, who designed the Great Western Railway between Bristol and London, two pioneering Bristol-built steamships, the SS Great Western and the SS Great Britain, and the Clifton Suspension Bridge.
In addition to diet and exercise, weight loss is an important tool to help with diabetes management. Type 2 diabetes (T2D) is often associated with obesity and increased abdominal circumference. Often patients who are at risk of diabetes may be able to reverse their progression to T2D with weight loss as well. Weight loss can help improve metabolic control, reduce the risk of further complications, other health related problems, and helps improve the effects of insulin on the body. Weight loss helps reduce the destruction of the beta cells, which produce insulin in the body, as well. It is recommended for patients who have been diagnosed with T2D who are overweight or obese to lose at least 5% of their weight and maintain the weight loss. There have been studies that have demonstrated that by losing about 5 to 10% of their weight at diagnosis, there is a reduction in heart disease risk factors, lowered Hb A1c, less diabetes medications, lower cholesterol and improved fitness. Common strategies to help reduce weight many include lifestyle measures such as diet and exercise, behavioral therapy, pharmacologic interventions, and surgery. The goal of weight loss and method for achievement should be individualized based on the patient's desires and motivation. It is important for providers to help maintain patient motivation and provide education to assist individuals in their weight journey. Additionally, some medications that reduce blood sugars such as insulin may initially cause weight gain due to the increased conversion of blood sugar to stored forms such as fat.
Actin filament disassembly The immobilization by interpenetration of actin filaments results from two distinct ABP families. The gelsolin protein family is believed to be the most efficient in the disruption of actin filaments and is considered a "strong severing protein". These proteins respond to an increase in Ca2+ and cap the "barbed end" of the recently severed F-actin. The increased level of Ca2+ may also destabilize the actin-filament network by interfering with the binding of crosslinking proteins. The ADF/Cofilin protein family also serves to severe actin-filament networks through the weak severing of actin networks. This form of weak severing does not tightly cap the "barbed ends" but does allow for the disassociation of actin monomers and thus the disassembly of F-actin. Monomer sequestration that prevents spontaneous nucleation Exists as the turnover point in the actin remodeling cycle. The proteins thymosin and profilin prevent the spontaneous nucleation of new actin trimers. The absence or inhibition of these proteins results in the cell's ability to commence the actin remodeling cycle and produce elongated F-actin.
==== Carcinogenesis and mutagenesis ==== In people receiving immunosuppressants to reduce transplant graft rejection, an increased risk of malignancy (cancer) is a recognised complication. The most common cancers are non-Hodgkin's lymphoma and skin cancers. The risk appears to be related to the intensity and duration of treatment.
Sources: en.wikipedia.org
=== 1972 === February 21: Nixon visits China, the first visit by a U.S. president since the establishment of the People's Republic of China. March 30: Viet Cong goes to the offensive in South Vietnam, only to be repulsed by the South Vietnamese regime with major American air support. April: The Ikiza mass killings occurred in Burundi committed by the Tutsi-dominated army against the Hutus. April 10: Biological Weapons Convention is signed banning the production, development and stockpiling of biological weapons. May 22: Richard Nixon attends Moscow Summit (1972), becoming the first US president to visit Moscow. May 26: Strategic Arms Limitation Talks (SALT I) agreement signals the beginning of détente between the U.S. and USSR. September 1: Bobby Fischer defeats Russian Boris Spassky in a chess match in Reykjavík, Iceland, becoming the first official American chess champion (see Match of the Century). September 2–28: The Summit Series, an ice hockey tournament between Canada and Soviet Union. September 21: Philippine president Ferdinand Marcos declares martial law, officially in response to the growing communist threat in the Philippines. September 26: The short border war occurred between the Yemen Arab Republic and South Yemen. December 18: Richard Nixon announces the beginning of a massive bombing campaign in North Vietnam.
Real estate development and the overall "improvement" of the city lead to increased rent in those parts of the city. Since marginalized communities tend to be more impoverished, they cannot financially support these increased rent levels and are physically displaced. Following physical displacement, there is also the issue of cultural displacement, as gentrification causes a loss of sense of belonging, ownership, history, identity and pride associated with living in a particular place. Data does show that Detroit's population loss is slowing. The decrease in 2017 was 2,376 residents compared to the 2016 decline of 2,770. The city has yet to rebound to the heights of population growth of the 1950s, but the decline is indeed slowing. As of 2021, the population declined further to 630,000.
== Description == The emu is the second tallest bird in the world, only being exceeded in height by the ostrich; the largest individuals can reach up to 150 to 190 cm (59 to 75 in) in height. Measured from the bill to the tail, emus range in length from 139 to 164 cm (55 to 65 in), with males averaging 148.5 cm (58.5 in) and females averaging 156.8 cm (61.7 in). Emus are the fourth or fifth heaviest living bird after the two species of ostrich and two larger species of cassowary, weighing slightly more on average than an emperor penguin. Adult emus weigh between 18 and 60 kg (40 and 132 lb), with an average of 31.5 and 37 kg (69 and 82 lb) in males and females, respectively. Females are usually slightly larger than males and are substantially wider across the rump.
Carbetocin, sold under the brand names Pabal among others, is a medication used to prevent excessive bleeding after childbirth, particularly following Cesarean section. It appears to work as well as oxytocin. Due to it being less economical than other options, use is not recommended by NHS Scotland. It is given by injection into a vein or muscle. Side effects differ little from that of no treatment or placebo. Use is not recommended in people with epilepsy or eclampsia. Carbetocin is a manufactured long acting form of oxytocin. It works by activating the oxytocin receptor which causes the uterus to contract. Carbetocin was synthesized before 1971 at the Czechoslovak Institute of Organic Chemistry and Biochemistry and was first described by 1974. It was approved for medical use in Canada and the United Kingdom in 1997. It is on the World Health Organization's List of Essential Medicines. It is not available in the United States or Japan.
Sources: en.wikipedia.org
== History == Alazocine was one of the early members of the benzomorphan family of opioid analgesics to be investigated. It was first described in the scientific literature in 1961. Its development resulted from nalorphine (N-allylnormorphine), a potent analgesic and opioid antagonist with similar pharmacology which had been introduced in the mid-1950s. Alazocine was found to produce strong psychotomimetic effects in humans, and it was not further developed for clinical use. Subsequently, other benzomorphans, such as pentazocine (an N-dimethylallylbenzomorphan), cyclazocine (an N-cyclopropylmethylbenzomorphan), and phenazocine (an N-phenylethylbenzomorphan), were developed, and some have been marketed for use as analgesics. The sigma σ1 receptor was named in 1976 and (+)-alazocine was described as its prototypical ligand. The receptor was initially thought to be an opioid receptor, and then was confused with the NMDA receptor for a time, but was ultimately distinguished from them both. The psychotomimetic effects of alazocine and the other benzomorphans were initially attributed incorrectly to agonism of the σ1 receptor; subsequent research established that the effects are in fact caused by agonism of the κ-opioid receptor and/or antagonism of the NMDA receptor.
From the analysis of individual atoms within proteins to the genetic and protein-based reconstruction of complex biological systems, the department provides various vital links between basic and translational biomedical research, contributing heavily to the C700 Biochemistry and C130 Biomedical Sciences undergraduate degree programmes and MSc taught courses in Bioinformatics and Biotechnology.
In the periodic table, mendelevium is located to the right of the actinide fermium, to the left of the actinide nobelium, and below the lanthanide thulium. Mendelevium metal has not yet been prepared in bulk quantities, and bulk preparation is currently impossible. Nevertheless, a number of predictions and some preliminary experimental results have been done regarding its properties. The lanthanides and actinides, in the metallic state, can exist as either divalent (such as europium and ytterbium) or trivalent (most other lanthanides) metals. The former have fns2 configurations, whereas the latter have fn−1d1s2 configurations. In 1975, Johansson and Rosengren examined the measured and predicted values for the cohesive energies (enthalpies of crystallization) of the metallic lanthanides and actinides, both as divalent and trivalent metals. The conclusion was that the increased binding energy of the [Rn]5f126d17s2 configuration over the [Rn]5f137s2 configuration for mendelevium was not enough to compensate for the energy needed to promote one 5f electron to 6d, as is true also for the very late actinides: thus einsteinium, fermium, mendelevium, and nobelium were expected to be divalent metals. The increasing predominance of the divalent state well before the actinide series concludes is attributed to the relativistic stabilization of the 5f electrons, which increases with increasing atomic number. Thermochromatographic studies with trace quantities of mendelevium by Zvara and Hübener from 1976 to 1982 confirmed this prediction.
Founder and lately Teacher, Harmanli Refugee Camp Play School, Bulgaria. For services to the Humanitarian Support of Refugee Children in Bulgaria. Sadie Clasby-Jarrous. Founder and lately Manager, Harmanli Refugee Camp Play School, Bulgaria. For services to the Humanitarian Support of Refugee Children in Bulgaria. Timothy Robert Conibear. Founder, Waves for Change. For services to Young People Overseas. John David Crouch. Lately Technical Works Supervisor, British Embassy Mogadishu, Somalia. For services to the UK Government Overseas. Sophie Louise Dyer. Lately Counsellor, Trade Policy, British Embassy Tokyo, Japan. For services to Trade. Deborah Carol Edgington. Councillor for Tourism, Fuerteventura, Canary Islands, Spain. For services to British Nationals in Fuerteventura. Richard John Field. Independent Voluntary and Charity Worker in rural Uganda. For services to Young People and Health in Uganda. Kelly Teresa Fisher. Professional Pool, Snooker and English Billiards player. For services to Sport. Nigel James Fossey. Principal, The Sultan's School, Oman and formerly Headmaster, King´s College School, Panama. For services to British Education Overseas. Lowri Mai Griffiths. Head, Ocean Policy Unit, Legal Directorate, Foreign, Commonwealth and Development Office. For services to Ocean Protection. Joanne Margaret Hare. Deputy Director, Foreign, Commonwealth and Development Office. For services to National Security. Elizabeth Ann Haydon. Head, Harrow International School, Hong Kong. For services to British Education in the UK and Hong Kong. Frank Alexander Menzies-Hearn.
This method allows identification of poisons at a few parts per billion, but that may be insufficient for reliable detection of the isotopic signature of the adducts, and therefore an unambiguous identification of the geographic origin of the poison.
Sources: en.wikipedia.org
Laboratories commonly use liquid chromatography coupled with mass spectrometry to detect SR9009. The method can identify the compound and estimate concentration in a sample. Detection limits depend on the matrix and instrument.
Research-grade purity indicates a supplier's measured percentage of the intended compound. It does not guarantee safety, sterility, or suitability for human consumption. Buyers should request a certificate of analysis with chromatograms and test methods.
Sports regulators prohibit SR9009 because it is a non-approved substance with potential performance-altering effects. Its presence can be detected in anti-doping testing. Athletes are responsible for substances found in their samples.
SR9009 is a synthetic research compound that acts on REV-ERB nuclear receptors. It is not approved for human use and is sold only as a research chemical. Its effects have been studied mainly in cells and rodents.