NR1D1 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.
Updated 2026-07-23. Numbers and descriptions here follow the published literature rather than marketing material.
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.
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.
| 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. |
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.
SR9009 is a synthetic small molecule studied as a REV-ERB agonist. REV-ERBα and REV-ERBβ are nuclear receptors that help regulate circadian rhythms and metabolic gene expression. The compound was identified in academic screening efforts to find synthetic ligands for these receptors. In cell and animal studies, SR9009 alters transcription of genes involved in lipid and glucose metabolism, and it can shift circadian behavior. It is not an approved therapeutic agent.
Mechanistically, SR9009 binds the ligand-binding domain of REV-ERBα/β and enhances recruitment of corepressor complexes. This represses target genes rather than activating them. Because REV-ERB proteins normally compete with ROR proteins at shared response elements, the net effect depends on tissue and timing. Researchers use SR9009 to probe how nuclear receptor signaling links the clock to metabolism, inflammation, and muscle biology. Findings are largely preclinical, and the precise contribution of each receptor subtype remains under study.
SR9009 is frequently discussed in fitness and research-chemical contexts, yet it has no approved medical indication. Regulatory agencies have not authorized it for human use, and it is not a standard prescription drug. Some sports organizations list it as a prohibited substance because of its potential performance-enhancing properties. Published human data are sparse, so claims about its effects in people often rely on animal models or anecdotal reports. Quality and identity of online materials can vary widely.
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. 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.
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.
Some 238U atoms, however, could capture another amount of neutrons (most likely, 16 or 17). The discovery of fermium (Z = 100) required more material, as the yield was expected to be at least an order of magnitude lower than that of element 99, and so contaminated coral from the Enewetak atoll (where the test had taken place) was shipped to the University of California Radiation Laboratory in Berkeley, California, for processing and analysis. About two months after the test, a new component was isolated emitting high-energy α-particles (7.1 MeV) with a half-life of about a day. With such a short half-life, it could only arise from the β− decay of an isotope of einsteinium, and so had to be an isotope of the new element 100: it was quickly identified as 255Fm (t = 20.07(7) h). The discovery of the new elements, and the new data on neutron capture, was initially kept secret on the orders of the U.S. military until 1955 due to Cold War tensions. Nevertheless, the Berkeley team was able to prepare elements 99 and 100 by civilian means, through the neutron bombardment of plutonium-239, and published this work in 1954 with the disclaimer that it was not the first studies that had been carried out on the elements. The "Ivy Mike" studies were declassified and published in 1955. The Berkeley team had been worried that another group might discover lighter isotopes of element 100 through ion-bombardment techniques before they could publish their classified research, and this proved to be the case.
females age 12 to 21 may have iron deficiency (27 June), researchers show how bird flu could mutate to overcome a human antiviral protein to start another pandemic (28 June), shortages of medications – including some against cancer – are reported across countries, articles in science outlets like Nature suggest contemporary viral concerns about hypothetical existential risk of AI "plays into the tech companies' agenda" – partly in the form of 'criti-hype' – and that this "hinders effective regulation of the societal harms AI is causing right now" and in the near-future. Promising results of therapeutic candidates are reported: first phase 3 trialed chikungunya vaccine (VLA1553) (12 June), mice-tested inoculation against a potential infectious contributor to endometriosis (14 June), new evidence regarding still-unclear vaginal seeding interventions (15 June), phase 2 trialed orforglipron against obesity (23 June), mice-tested gene-therapy against hearing loss (28 June).
In 1947, the United Gold Coast Convention led by "The Big Six" called for "self-government within the shortest possible time." Following the 1946 Gold Coast legislative election, Kwame Nkrumah, a Ghanaian nationalist who led Ghana from 1957 to 1966 as the country's first prime minister and president, formed the Convention People's Party in 1949 with the motto "self-government now". The party initiated a "positive action" campaign involving non-violent protests, strikes and non-cooperation with the British authorities. Nkrumah was arrested and sentenced to one year imprisonment during this time. In the Gold Coast's 1951 general election, he was elected to Parliament and was released from prison. At midnight on 6 March 1957, the Gold Coast, Ashanti, the Northern Territories, and British Togoland were unified as one single independent dominion within the British Commonwealth under the name Ghana. This was done under the Ghana Independence Act 1957. The flag of Ghana, consisting of the colours red, gold, green, and a black star, dates back to this unification. On 1 July 1960, following the Ghanaian constitutional referendum and Ghanaian presidential election, Nkrumah declared Ghana a republic and assumed the presidency. The nation's Independence Day is 6 March, and 1 July is celebrated as Republic Day. Nkrumah led an authoritarian regime in Ghana, repressing political opposition and conducting elections that were not free and fair. In 1964, a constitutional amendment made Ghana a one-party state, with Nkrumah as president for life of the nation and its party.
Stem cell treatment not only allowed more horses to return to full duty and also greatly reduced the re-injury rate over a three-year period. The use of embryonic stem cells has also been applied to tendon repair. The embryonic stem cells were shown to have a better survival rate in the tendon as well as better migrating capabilities to reach all areas of damaged tendon. The overall repair quality was also higher, with better tendon architecture and collagen formed. There was also no tumor formation seen during the three-month experimental period. Long-term studies need to be carried out to examine the long-term efficacy and risks associated with the use of embryonic stem cells. Similar results have been found in small animals.
Sources: en.wikipedia.org
These may be eaten on their own or with a light sauce, or further cooked in liquids; they are also added to hot pot dishes or included as part of the vegetarian dish called luohan zhai. Some types of dried tofu are pre-seasoned with special blends of spices, so that the tofu may either be called "five-spice tofu" (五香豆腐 wǔxiāng dòufu) or "soy sauce stewed tofu" (滷水豆腐 lǔshuǐ dòufu). Dried tofu is typically served thinly sliced with chopped green onions or with slices of meat for added flavor. Pickled tofu is commonly used in small amounts together with its soaking liquid to flavor stir-fried or braised vegetable dishes (particularly leafy green vegetables such as water spinach). It is often eaten directly as a condiment with rice or congee.
He had to leave the game after the seventh with a pulled back muscle, but he was back in action four days later. He won just twice more all season, as he dealt with back problems. On August 1, he again struck out eight Phillies but received a no decision, as he was removed with one out in the ninth and the game tied 1–1. The Cardinals won on a Stan Musial home run in the bottom of the inning. In 31 games (30 starts), he had a 13–10 record, a 4.20 ERA, 108 strikeouts, and 89 walks in 201+1⁄3 innings pitched. By 1960, Mizell had recovered from his back issues. He began the season with the Cardinals but only won one of his first nine games, posting a 4.55 ERA. By this point, the Cardinals felt that he had never attained his full potential. On May 28, they traded him and Dick Gray to the Pirates for Ed Bauta and Julián Javier, the latter of whom would reach two All-Star Games and win two World Series with the Cardinals over the next decade.
2/3 as important as family income is parent's involvement, which is 0.1 partial correlation coefficients more important than aggressive parenting (negative), father's unemployment (negative), family conflict (negative) and whether the mother worked in the subject's 1st year of life. Whether the mother worked thereafter has 0 correlation with well-being, however. In terms of non-family factors, the place where someone goes to secondary school matters a fair bit more than observed family background altogether, which in turn is slightly more important than the place where someone went to primary school.
Sources: en.wikipedia.org
The first column specifies the position, the second column contains the number of occurrences of A at that position, the third column contains the number of occurrences of C at that position, the fourth column contains the number of occurrences of G at that position, the fifth column contains the number of occurrences of T at that position, and the last column contains the IUPAC notation for that position. Note that the sums of occurrences for A, C, G, and T for each row should be equal because the PFM is derived from aggregating several consensus sequences.
Industry Secretary Tony Benn thought Heseltine intellectually shallow (describing one of his speeches as "an awful old flop" and another as "another flayling attack") but admired his ability to make headlines in opposition. The infamous mace incident took place on 27 May 1976 during the Labour government Aircraft and Shipbuilding Industries Bill to nationalise those industries, this measure had already lasted a year and seen 58 Committee sessions. The Speaker had ruled the bill to be hybrid, as it excluded one shipbuilding company (although there was dispute as to whether the company in question actually was a shipbuilder). All interested parties were therefore entitled to put their case to a special select committee. An earlier vote in favour of the Speaker's ruling had been tied, and defeated after the Speaker had been obliged by convention to use his casting vote against his own ruling. The Labour Government now moved to suspend the normal Parliamentary standing order to allow the bill to proceed as normal. This time the Conservatives expected the Speaker to use his casting vote against the government's motion to suspend the standing order. Instead the Labour motion was carried, after a Labour whip broke his pair. Amid riotous scenes of Labour left-wingers singing The Red Flag Heseltine picked up the Mace, the symbol of Parliament's authority, until Jim Prior grabbed it off him.
In molecular biology, the flagellar motor switch protein (Flig) is one of three proteins in certain bacteria coded for by the gene fliG. The other two proteins are FliN coded for by fliN, and FliM coded for by fliM. The protein complex regulates the direction of flagellar rotation and hence controls swimming behaviour. The switch is a complex apparatus that responds to signals transduced by the chemotaxis sensory signalling system during chemotactic behaviour. CheY, the chemotaxis response regulator, is believed to act directly on the switch to induce a switch in the flagellar motor direction of rotation.
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.
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.