Everything below concerns reference standard. We keep the language plain, cite what the science says, and separate well-supported claims from open questions.
Last reviewed on 2025-12-18. Where a claim depends on a specific study, the study is described rather than over-claimed.
Quality control for research materials includes identity confirmation by nuclear magnetic resonance and purity assessment by high-performance liquid chromatography. Mass spectrometry provides molecular weight confirmation and can detect related impurities. Purchasers should request a certificate of analysis that lists lot-specific data. Online products advertised for human use often lack such documentation. Distinguishing legitimate research material from mislabeled or contaminated samples is a recurring challenge in independent testing, and independent laboratories may use orthogonal methods to verify identity.
Detection of SR9009 in biological samples usually relies on liquid chromatography coupled to tandem mass spectrometry. This approach separates the compound from matrix components and identifies it by mass transitions. Because SR9009 can undergo metabolism, laboratories often look for both parent drug and specific metabolites. Sample preparation may involve protein precipitation or solid-phase extraction. Method validation examines sensitivity, carryover, and interference from related substances, and reference standards are required for accurate calibration.
Storage recommendations for SR9009 reference material typically specify a freezer at -20 °C or lower, with protection from moisture and light. Repeated freeze-thaw cycles can degrade small molecules and introduce variability. Stock solutions in dimethyl sulfoxide are often aliquoted to avoid repeated handling. Stability studies may examine degradation under heat, humidity, and light exposure. The compound's thiophene and nitro groups can participate in reactions that alter analytical signals over time, so such changes affect quantitative results.
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.
| Property | Value | Notes |
|---|---|---|
| Typical storage temperature | -20 °C or lower | Desiccated and protected from light |
| Common analytical method | LC-MS/MS | Detects parent drug and metabolites |
| Solubility class | Lipophilic; soluble in organic solvents | Low aqueous solubility |
| Molecular weight | 437.94 g/mol | Calculated from reported formula |
| Synonyms | SR9009; REV-ERB agonist | Code name used in scientific literature |
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.
SR9009 is supplied as a solid research chemical, often in milligram quantities. Laboratories typically weigh it in a controlled environment because fine powders can disperse. Stock solutions are commonly prepared in dimethyl sulfoxide and stored in small aliquots to reduce freeze-thaw cycles. Personal protective equipment and chemical fume hoods are standard when handling unknown or potent compounds. These practices address laboratory safety rather than human use.
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.
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.
Detection in biological samples can be complicated by rapid metabolism and low circulating concentrations. Some studies report phase I and phase II metabolites, and analytical methods may need to target those species in addition to the parent compound. Immunoassays are not broadly available, so mass spectrometry remains the main confirmatory approach. For anti-doping testing, laboratories look for SR9009 and its metabolites using validated LC-MS methods. Open questions include how long metabolites remain detectable and how different routes of administration alter detection windows.
In laboratory settings, SR9009 is typically characterized by liquid chromatography–mass spectrometry (LC-MS) or high-performance liquid chromatography with ultraviolet detection (HPLC-UV). These methods can confirm identity and estimate purity, but they require reference standards for accurate quantification. Because SR9009 is not a licensed pharmaceutical, no harmonized pharmacopeial monograph exists. Laboratories often validate in-house methods for matrices such as plasma, urine, or cell culture media. Sample preparation may involve protein precipitation or liquid-liquid extraction before analysis.
Physicochemical behavior influences handling. SR9009 is described as a solid with limited aqueous solubility, so organic solvents such as dimethyl sulfoxide or ethanol are common in research stock solutions. Aqueous dilution can produce precipitates if the organic content is too low. Light, heat, and repeated freeze-thaw cycles may affect stability. Storage recommendations usually specify a desiccated freezer environment protected from light, but exact stability data depend on the formulation and matrix.
=== Agonists === α-MSH and ACTH are both peptides derived from processed POMC, and both activate the other MCR's, but ACTH is the only agonist ligand for MC2R (ACTH receptor). This suggests that there is more protein-related specificity for binding MC2R.
The virus has been used for cyber warfare against the national oil companies Saudi Aramco and Qatar's RasGas. Saudi Aramco announced the attack on their Facebook page and went offline again until a company statement was issued on 25 August 2012. The statement falsely reported normal business was resumed on 25 August 2012. However a Middle Eastern journalist leaked photographs taken on 1 September 2012 showing kilometers of petrol trucks unable to be loaded due to backed business systems still inoperable. On 29 August 2012 the same attackers behind Shamoon posted another pastie on PasteBin.com, taunting Saudi Aramco with proof they still retained access to the company network. The post contained the username and password on security and network equipment and the new password for the CEO Khalid Al- Falih The attackers also referenced a portion of the Shamoon malware as further proof in the pastie. According to Kubecka, in order to restore operations. Saudi Aramco used its large private fleet of aircraft and available funds to purchase much of the world's hard drives, driving the price up. New hard drives were required as quickly as possible so oil prices were not affected by speculation. By 1 September 2012 gasoline resources were dwindling for the public of Saudi Arabia 17 days after the 15 August attack. RasGas was also affected by a different variant, crippling them in a similar manner.
== Sources == Baikiain has been found in diverse natural sources including dates, African teak (Baikiaea plurijuga) wood, and the red algae Serraticardia maxima. Several laboratory syntheses of baikiain and its racemic form have been reported.
== Pharmacology == Experiments on former addicts indicated it was quite addictive and in high doses, compared to other opioids, may have increased abuse potential in former and current opioid addicts. While some effort was first suggested for drafting of a resolution urging governments to stop manufacture and use of ketobemidone, this result was not in agreement with clinical observations, and another study in 1958 did not find it more addictive than morphine. That study noticed that while for morphine the dose for euphoria is the same as that for analgesia, for ketobemidone the analgesic dose was well below the euphoric dose. Thus, even compared to morphine, ketobemidone may be much more effective without causing significant euphoria and thus having a lower risk of addiction under the supervision of a qualified clinician. Ketobemidone is mostly used in the Scandinavian countries, with Denmark topping the statistics. Analgesia after 5-10 mg orally or 5–7.5 mg intravenously lasts 3–5 hours. Ketobemidone is also available in preparations with a spasmolytic, which can improve the analgesia.
==== Sports Promotion ==== Milatović instituted a practice of hosting state receptions to honor national athletic teams, Olympians, Paralympians, and individual athletes following performance in international competitions (such as national water polo, handball, and basketball teams). Additionally, he publicly advocated for public-private funding initiatives to build modernized sports infrastructure and recreational facilities in economically disadvantaged northern municipalities.
Sources: en.wikipedia.org
Radium's long half-life of 1600 years means that surfaces coated with radium paint, such as watch faces and hands, remain a health hazard long after their useful life is over. There are still millions of luminous radium clock, watch, and compass faces and aircraft instrument dials owned by the public. The case of the "Radium Girls", workers in watch factories in the early 1920s who painted watch faces with radium paint and later contracted fatal cancer through ingesting radium when they pointed their brushes with their lips, increased public awareness of the hazards of radioluminescent materials, and radioactivity in general.
== Classification == Neuromuscular blocking agents are classified into the following two groups: Depolarizing neuromuscular blockers: Depolarizing neuromuscular blockers directly bind to postsynaptic cholinergic receptors of the neuromuscular junction to generate a sustained action potential. This causes prolonged stimulation and desensitization of neuroreceptors, causing skeletal muscle relaxation effects such as paralysis. Depolarizing neuromuscular blockers, notably succinylcholine, tend to be preferred over non-depolarizing neuromuscular blockers due to their long-acting and rapid-onset properties. Non-depolarizing neuromuscular blockers: Non-depolarizing neuromuscular blockers directly bind to acetylcholine receptors on the postsynaptic neuron and does not cause depolarization of the neuromuscular junction. They act as competitive inhibitors to acetylcholine, blocking their binding to acetylcholine receptors on the postsynaptic membrane to inhibit membrane depolarization. Inhibition of neurotransmitter binding in the neuromuscular junction induces paralyzing effects. Compared to depolarizing neuromuscular blockers, non-depolarizing neuromuscular blockers tend to have slower onset times and shorter duration of actions. Aside from neuromuscular blocking agents, acetylcholinesterase inhibitors and butyrylcholinesterase inhibitors act on the neuromuscular junction to enhance neurotransmitter transmission in voluntary and involuntary muscles. Additionally, some antibiotics, such as aminoglycosides, may also exert undesired side effects on the neuromuscular junction.
It also announces that it will no longer grant blanket immunity to politicians who use its service, especially if their posts are deemed to be deceptive or abusive. District Judge Roger Benitez overturns California's ban on assault weapons. A letter to Apple's Tim Cook is made public, in which staff request more flexibility over remote work, following the company's decision to return its 150,000 employees to the office. The FDA approves the first new medication since 2014, semaglutide (Wegovy), for chronic weight management. June 5 – Aftermath of the January 6 United States Capitol attack – The Department of Justice says that over 465 people have been arrested since the January 6 attack. It is also seeking information on 250 other suspects. June 6 Aftermath of the January 6 United States Capitol attack – Rep. Eric Swalwell (D–CA) announces he sued Mo Brooks (R–AL) for being responsible for inciting January 6. COVID-19 vaccination in the United States: The U.S. surpasses 300 million COVID-19 vaccine doses administered. Floyd Mayweather fights in an exhibition bout against YouTuber Logan Paul. The United States defeats Mexico 3–2 after extra time in the final to become the first champions of the CONCACAF Nations League. June 7 Twitter suspensions: Twitter announces that they have suspended the account of former Florida Department of Health dashboard manager Rebekah Jones for spamming and "platform manipulation" after she paid other users to follow her. Aducanumab (Aduhelm), the first new medication for Alzheimer's disease in 20 years, is approved by the FDA.
=== Particle size === Most traditional HPLC is performed with the stationary phase attached to the outside of small spherical silica particles (very small beads). These particles come in a variety of sizes with 5 μm beads being the most common. Smaller particles generally provide more surface area and better separations, but the pressure required for optimum linear velocity increases by the inverse of the particle diameter squared. According to the equations of the column velocity, efficiency and backpressure, reducing the particle diameter by half and keeping the size of the column the same, will double the column velocity and efficiency; but four times increase the backpressure. And the small particles HPLC also can decrease the width broadening. Larger particles are used in preparative HPLC (column diameters 5 cm up to >30 cm) and for non-HPLC applications such as solid-phase extraction.
Sources: en.wikipedia.org
=== 19th century to WWII === From the end of the 19th century, systematic scientific and technical studies began on the processes of slowing down aging and possible rejuvenation. The period of world history between the two world wars is a very complicated, difficult and ambiguous time of world history. In many spheres of life, there were ideas that were radical-bold, but not always intelligent, ethical and moral from the point of view of modern knowledge, foundations and norms. This also affected the aging research, the spirit of which corresponded to the spirit of that time: attempting bold experiments, often on people, intensively implementing in practice treatments that we may now consider ridiculous. Those attempts had both bad and good consequences. But those researches were already scientific. As it often happens in science, it is often difficult to establish priority considering, who was the first person beginning to use one or another approach. Usually the first experiments are done by enthusiasts and have doubtful positive effects. Some researchers work in parallel. Then at some moment the persons emerge who developed the approaches and made them public.
In 2010, after a nine-year trial, the Sydney site was confirmed as a permanent public health facility. As of late 2009 there were a total of 92 professionally supervised injection facilities in 61 cities. In North American, as of 2023 there are supervised injection sites operating in a number of Canadian cities, and two in United States. The sites in United States opened in 2021.
The decreased oxytocin receptor levels were associated with behavioral changes including increased aggression and anxiety-like behavior, hyperactivity, and diminished social behaviors and memory. Exogenous administration of oxytocin receptor agonists like oxytocin or TGOT was able to partially reverse the behavioral changes.
Molybdenum, despite its low concentration in the environment, is a critically important element for Earth's biosphere due to its presence in the most common nitrogenases. Without molybdenum, nitrogen fixation would be greatly reduced, and a large part of biosynthesis as we know it would not occur. Molybdenum is also essential to many individual organisms as a component of enzymes, particularly as part of the molybdopterin class of cofactors.
=== 22 December === United States National Security Council spokesperson John Kirby estimated that the Wagner Group deployed 40,000 mercenaries of recruited convicts and 10,000 mercenaries. The North Korean Foreign ministry denied US claims that it was supplying "infantry rockets and missiles into Russia". Speaking to reporters, President Putin referred to the invasion of Ukraine as a "war" and also said that the U.S. Patriot system is "old and does not work as well as the Russian S-300 missile system". Critics stated that referring to the conflict as a "war" is considered a crime under a censorship law signed in March 2022, with a penalty of up to 15 years in prison, and called for the prosecution of Putin. Ukrainian game developer Volodymyr Yezhov was killed defending Bakhmut
Sources: en.wikipedia.org
Liquid chromatography-tandem mass spectrometry is a common approach. It can detect the parent compound and its metabolites in biological matrices.
Research samples are typically kept frozen, desiccated, and protected from light. Stock solutions are often aliquoted to reduce freeze-thaw cycles.
High-performance liquid chromatography and nuclear magnetic resonance are standard for purity and identity. Mass spectrometry confirms molecular weight.
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.