REV-ERB agonist comes up often in conversation and rarely with the context attached. Here we lay out the basics in order, then work through the practical considerations.
Last reviewed on 2026-03-31. Where a claim depends on a specific study, the study is described rather than over-claimed.
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.
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.
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.
| 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 |
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.
SR9009 is often grouped with compounds studied for circadian and metabolic regulation rather than with classical anabolic steroids. Its interactions with nuclear receptors differ from those of androgen receptor ligands, and its proposed mechanisms involve transcriptional control rather than direct hormone signaling. Some sources classify it as a metabolic modulator because of observed effects on energy utilization. The distinction matters for regulation and for interpreting research results across different compound classes.
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.
=== Murder of Catherine "Rena" West === Rena maintained sporadic contact with her children on each occasion she and Fred separated. She is also known to have visited Fred's family in Much Marcle, Herefordshire, to enquire as to her children's whereabouts and welfare in the latter half of August 1971. Fred's sister-in-law, Christine, later recollected Rena was depressed and extremely anxious about her children. Being provided with Fred's Midland Road address, Rena sought to confront him—likely to discuss or demand custody of her daughters. This was the last time Rena was seen alive. She is believed to have been murdered by strangulation, possibly in the back seat of Fred's Ford Popular and likely while intoxicated. When Rena's body was discovered, a short length of metal tubing was found with her remains, leaving open a possibility she had been restrained and subjected to a sexual assault prior to her murder. The body was extensively dismembered, placed into plastic bags and buried close to a cluster of trees, known as Yewtree Coppice, at Letterbox Field.
Although protests against Bukele occurred in 2020 during the COVID-19 pandemic and in 2023 about his re-election campaign and gang crackdown, he has retained high job-approval ratings throughout his presidency. Bukele's approval rating has never gone below 75 percent, and has averaged in the 90s. He is one of the most popular presidents in Salvadoran history, and the Los Angeles Times' Kate Linthicum called him "one of the most popular leaders in the world". The United States Institute of Peace's Mary Speck referred to Bukele as "Latin America's — and possibly the world's — most popular leader". Risa Grais-Targow, a director at the Eurasia Group, described Bukele's approval rating as "sky-high" and "really unprecedented". In addition to Bukele's domestic popularity, he is also very popular among Salvadorans living in the United States and throughout Latin America. Some Latin American state leaders and other politicians have sought to emulate his government policies. In some countries, such as Colombia and Ecuador, opinion polls found Bukele more popular with their residents than domestic politicians. Steven Levitsky, a political scientist and the director of Harvard University's Latin American studies center, wrote that "everybody wants to be a Bukele" and compared his popularity across Latin America to that of former Venezuelan president Hugo Chávez. Some political analysts consider Bukele's popularity a cult of personality.
Computer Games Magazine argued the futility of reviewing the game due to its episodic nature; as the first part of a three-part story arc, it is difficult to judge it when divorced from the final product. Game Revolution expressed disappointment at a lack of new features such as environments and weapons. During the 10th Annual Interactive Achievement Awards, the Academy of Interactive Arts & Sciences nominated Half-Life 2: Episode One for "First-Person Action Game of the Year".
Plant hormones (or phytohormones) are signal molecules, produced within plants, that occur in extremely low concentrations. Plant hormones control all aspects of plant growth and development, including embryogenesis, the regulation of organ size, pathogen defense, stress tolerance and reproductive development. Unlike in animals (in which hormone production is restricted to specialized glands) each plant cell is capable of producing hormones. Went and Thimann coined the term "phytohormone" and used it in the title of their 1937 book. Phytohormones occur across the plant kingdom, and even in algae, where they have similar functions to those seen in vascular plants ("higher plants"). Some phytohormones also occur in microorganisms, such as unicellular fungi and bacteria, however in these cases they do not play a hormonal role and can better be regarded as secondary metabolites.
=== Background === After World War I, the United States pursued a policy of isolationism and declined to join the League of Nations in 1919. Roosevelt had been a supporter of the League of Nations but, by 1935, he told his foreign policy adviser Sumner Welles: "The League of Nations has become nothing more than a debating society, and a poor one at that!". Roosevelt criticized the League for representing the interests of too many nations. He came to favor an approach to global peace secured through the unified efforts of the world's great powers, rather than through the Wilsonian notions of international consensus and collaboration that guided the League of Nations. The idea that great powers should "police" the world had been discussed by President Roosevelt as early as August 1941, during his first meeting with British Prime Minister Winston Churchill. When the Atlantic Charter was issued, Roosevelt had ensured that the charter omitted mentioning any American commitment towards the establishment of a new international body after the war. He was reluctant to publicly announce his plans for creating a postwar international body, aware of the risk that the American people might reject his proposals, and he did not want to repeat Woodrow Wilson's struggle to convince the Senate to approve American membership in the League of Nations. Roosevelt's proposal was to create a new international body led by a "trusteeship" of great powers that would oversee smaller countries. In September 1941, he wrote:
Sources: en.wikipedia.org
As of 2019, GSK-3 is the only type of glycogen synthase kinase named and recognized. The gene symbols for GSK1 and GSK2 have been withdrawn by the HUGO Gene Nomenclature Committee (HGNC), and no new names for these "genes" nor their locations have been specified.
The major histocompatibility complex (MHC) is a large locus on vertebrate DNA containing a set of closely linked polymorphic genes that code for cell surface proteins essential for the adaptive immune system. These cell surface proteins are called MHC molecules. Its name comes from its discovery during the study of transplanted tissue compatibility. Later studies revealed that tissue rejection due to incompatibility is only a facet of the full function of MHC molecules, which is to bind an antigen derived from self-proteins, or from pathogens, and bring the antigen presentation to the cell surface for recognition by the appropriate T-cells. MHC molecules mediate the interactions of leukocytes, also called white blood cells (WBCs), with other leukocytes or with body cells. The MHC determines donor compatibility for organ transplant, as well as one's susceptibility to autoimmune diseases. In a cell, protein molecules of the host's own phenotype or of other biologic entities are continually synthesized and degraded. Each MHC molecule on the cell surface displays a small peptide (a molecular fraction of a protein) called an epitope. The presented self-antigens prevent an organism's immune system from targeting its own cells. The presentation of pathogen-derived proteins results in the elimination of the infected cell by the immune system.
== Rise to prominence (1970–1976) == In 1971, Mahathir announced his plan to rejoin UMNO, stating he would make a formal statement at an appropriate time; that same year, he also met Prime Minister Abdul Razak Hussein during a visit to Morib. Mahathir rejoined UMNO on 7 March 1972. Recognizing his potential and sharp political acumen, Razak appointed Mahathir as a Senator for Kedah in 1973. Around the same time, Mahathir also became the chairman of Food Industries of Malaysia (FIMA) Sdn. Bhd. In January 1973, as chairman of the FIMA, Mahathir visited a government factory in Pekan Nanas. He faced peaceful protests from over 200 workers demanding better working conditions and wage improvements. After Mahathir spoke to the workers and promised to review their grievances, they dispersed peacefully. He remained chairman of FIMA until 1981, when he became prime minister and was succeeded by Basir Ismail. Mahathir rose quickly in the Abdul Razak government, returning to UMNO's Supreme Council in 1973. He returned to the House of Representatives in the 1974 election, winning the Kedah-based seat of Kubang Pasu unopposed. He was appointed to Cabinet in September 1974 as the Minister for Education. During his tenure, Mahathir rolled out a new school curriculum for both primary and secondary schools, designed to provide holistic education and cultivate well-rounded individuals. Around this time, he also ceased his private medical practice. In 1975, Mahathir ran for one of the three vice-presidencies of UMNO.
In addition to pure indica, sativa, and ruderalis varieties, hybrid varieties with varying ratios of these three types are common, such as the White Widow hybrid which has about 60% indica and 40% sativa ancestry. These hybrid varieties exhibit traits from both parental types. There are also commercial crossbred hybrids which contain a mix of both ruderalis, indica or sativa genes, and are usually autoflowering varieties. "Lowryder" was an early auto-flowering hybrid that retained the flowering behavior of ruderalis plants, while also producing appreciable amounts of THC and CBD. Autoflowering cannabis varieties have the advantage of being discreet due to their small stature. They also require shorter growing periods, as well as having the additional advantage that they do not rely on a change in the photoperiod to determine when to flower. Breeding requires pollinating a female cannabis plant with male pollen. Although this occurs spontaneously and ubiquitously in nature, the intentional creation of new varieties typically involves selective breeding in a controlled environment.
Sources: en.wikipedia.org
Hypochlorous acid is an inorganic compound with the chemical formula ClOH, also written as HClO, HOCl, or ClHO. Its structure is H−O−Cl. It is an acid that forms when chlorine dissolves in water, and itself partially dissociates, forming a hypochlorite anion, ClO−. HClO and ClO− are oxidizers, and the primary disinfection agents of chlorine solutions. HClO cannot be isolated from these solutions due to rapid equilibration with its precursor, chlorine, and its anhydride, dichlorine monoxide. Because of its strong antimicrobial properties, the related compounds sodium hypochlorite (NaOCl) and calcium hypochlorite (Ca(OCl)2) are ingredients in many commercial bleaches, deodorants, and disinfectants. The white blood cells of mammals, such as humans, also contain hypochlorous acid as a tool against foreign bodies. In living organisms, HOCl is generated by the reaction of hydrogen peroxide with chloride ions under the catalysis of the heme enzyme myeloperoxidase (MPO). Like many other disinfectants, hypochlorous acid solutions will destroy pathogens, such as COVID-19, adsorbed on surfaces.
== Description == Bryant Park is located between Fifth and Sixth Avenues and between 40th and 42nd Streets, and covers 9.6 acres (3.9 ha). Although technically the main branch of the New York Public Library is located within the park, in design it forms the eastern boundary of the park's green space, making Sixth Avenue the park's primary entrance. Bryant Park is used mostly as a passive recreation space, and lacks active sports facilities. Bryant Park is several steps above the surrounding streets, enclosed by a retaining wall. Granite stairs at several locations provide access from the surrounding sidewalks. The surrounding area contains numerous structures, including the Bank of America Tower and 1095 Avenue of the Americas to the northwest; the Bryant Park Studios, American Radiator Building, Engineers' Club Building, and 452 Fifth Avenue to the south; 461 Fifth Avenue and the Stavros Niarchos Foundation Library to the southeast; and 500 Fifth Avenue, the Aeolian Building, and the W.R. Grace Building to the north. One of the park's largest features is a large lawn located slightly below the level of the surrounding walkways. Besides serving as a "lunchroom" for office workers, the lawn serves as the seating area for some of the park's major events, such as Bryant Park Movie Nights, Broadway in Bryant Park, and Square Dance. The lawn's season runs from February until October, when it is closed to make way for Bank of America Winter Village. Numerous walkways surround the central lawn. The northern and southern sides are each flanked by two flagstone walkways.
After hypothyroidism was found to cause a lower basal metabolic rate, this was used as a marker to guide adjustments in therapy in the early 20th century (around 1915). However, a low basal metabolic rate was known to be non-specific, also present in malnutrition. The first laboratory test to help assess thyroid status was the serum protein-bound iodine, which came into use around the 1950s. In 1971, the thyroid stimulating hormone (TSH) radioimmunoassay was developed, which was the most specific marker for assessing thyroid status in patients. Many people who were being treated based on basal metabolic rate, minimizing hypothyroid symptoms, or based on serum protein-bound iodine, were found to have excessive thyroid hormone. The following year, in 1972, a T3 radioimmunoassay was developed, and in 1974, a T4 radioimmunoassay was developed.
=== Modern sex determination methods === Recent developments in bioarchaeological methods have introduced more accurate and standardized techniques for sex estimation, especially when skeletal preservation is poor. Metric analyses of pelvic morphology using tools such as the Diagnose Sexuelle Probabiliste (DSP) method have achieved over 95% accuracy in adult individuals when analyzing the os coxae, using discriminant functions based on population-specific reference data. Geometric morphometric analyses of cranial and pelvic landmarks, particularly when paired with statistical classifiers or machine learning algorithms, have also shown high success rates in identifying sex across both forensic and archaeological samples. Molecular techniques have also become integrated into bioarchaeological practice. Ancient DNA (aDNA) shotgun sequencing enables near-perfect sex determination by quantifying X- and Y-chromosome reads, proving especially valuable when osteological indicators are absent or ambiguous. Where DNA preservation is insufficient, dental proteomics as detected amelogenin peptides in tooth enamel provide a minimally destructive and highly reliable alternative for sex estimation.
To overcome this effect, a new index was created, named the Equatorial Southern Oscillation Index (EQSOI). To generate this index, two new regions, centered on the Equator, were defined. The western region is located over Indonesia and the eastern one over the equatorial Pacific, close to the South American coast. However, data on EQSOI goes back only to 1949. Sea surface height (SSH) changes up or down by several centimeters in Pacific equatorial region with the ENSO: El Niño causes a positive SSH anomaly (raised sea level) because of thermal expansion while La Niña causes a negative SSH anomaly (lowered sea level) via contraction.
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.
It is a synthetic compound studied as an agonist of REV-ERB nuclear receptors. It is not an approved medicine and has mainly been examined in laboratory and animal research.