Everything below concerns LC-MS/MS. We keep the language plain, cite what the science says, and separate well-supported claims from open questions.
Updated 2026-06-29. 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.
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.
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.
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.
| 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 |
Regulatory agencies have not approved SR9009 for human therapeutic use. It is typically sold as a research chemical with labels stating that it is not for human consumption. The World Anti-Doping Agency prohibits the substance in sport, generally under the category of non-approved substances. Customs and national laws may restrict importation, sale, or possession. Product quality and legal status can vary by country and vendor, and therapeutic claims are not permitted in regulated advertising because the compound lacks approval.
Several misconceptions surround SR9009. It is often described as a SARM, a steroid, or an exercise pill, but its known target is the REV-ERB receptor family. Rodent studies have examined exercise capacity and metabolic markers, yet human outcomes remain unproven. Oral bioavailability appears low in animals, and human pharmacokinetics are not well characterized. Online products may contain impurities or different compounds, so identity and purity testing are important for research use.
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.
Research interest in SR9009 grew from studies showing improved running endurance in mice after short treatment periods. Those experiments linked the compound to increased mitochondrial content and fatty acid oxidation in muscle, but the findings come from animal models and specific dosing schedules. Independent replication has been limited, and the pathways connecting REV-ERB activation to exercise performance are still being mapped. Whether similar responses occur in humans is an open question.
Laboratory samples of SR9009 are typically handled as research chemicals rather than pharmaceuticals. Suppliers usually state that the material is for research use only and not for human or veterinary administration. Storage recommendations generally call for a freezer at approximately −20 °C, protection from light, and a desiccated environment. The solid is often described as a white to off-white powder. Solubility is commonly reported in organic solvents such as dimethyl sulfoxide and ethanol, with low solubility in water.
Analytical identification and purity assessment often use high-performance liquid chromatography with ultraviolet detection or mass spectrometry. Liquid chromatography–tandem mass spectrometry is used to detect and quantify SR9009 in biological matrices, including urine and blood, for anti-doping or pharmacokinetic studies. Nuclear magnetic resonance spectroscopy can confirm molecular structure. Stability depends on form and storage: the solid is generally more stable than solutions, and repeated freeze–thaw cycles may degrade samples. Purity is typically reported as a percentage from a certificate of analysis.
Regulatory treatment of SR9009 varies by country and context. It is not approved as a therapeutic drug by agencies such as the United States Food and Drug Administration or the European Medicines Agency. Sports authorities list it as a prohibited substance; the World Anti-Doping Agency classifies it among hormone and metabolic modulators. Legal status for personal possession or sale differs across jurisdictions, and some countries may restrict it under analog or research chemical laws. Buyers who seek verified material often rely on independent laboratory testing because online product labels may not match contents.
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.
There are seven naturally occurring isotopes of thorium but none are stable. 232Th is the only isotope of thorium occurring in quantity in nature; its half-life is 14.0 billion years, about three times the age of the Earth, and slightly longer than the age of the universe, and longest of all nuclides heavier than bismuth. Its stability is attributed to its closed nuclear subshell with 142 neutrons. Thorium has a characteristic terrestrial isotopic composition, with atomic weight 232.0377±0.0004. It is one of only four radioactive elements (along with bismuth, protactinium and uranium) that occur in large enough quantities on Earth for a standard atomic weight to be determined. Thorium nuclei are susceptible to alpha decay because the strong nuclear force cannot overcome the electromagnetic repulsion between their protons. The alpha decay of 232Th initiates the 4n decay chain, or thorium series, which includes isotopes with a mass number divisible by 4. This chain of consecutive alpha and beta decays begins with the decay of 232Th to 228Ra and terminates at 208Pb. Any sample of thorium or its compounds contains traces of these daughters, which are isotopes of thallium, lead, bismuth, polonium, radon, radium, and actinium. Natural thorium samples can be chemically purified to extract useful daughter nuclides, such as 212Pb, which is used in nuclear medicine for cancer therapy. 227Th (alpha emitter, 18.693 days half-life) can also be used in cancer treatments such as targeted alpha therapies.
Since fentanyl itself is already highly potent, 3-methylfentanyl is extremely dangerous when used recreationally, and has resulted in many deaths among recreational opioid users ingesting the drug. Side effects of fentanyl analogs are similar to those of fentanyl itself, which include itching, nausea and potentially serious respiratory depression, which can be life-threatening. Fentanyl analogs have killed hundreds of people throughout Europe and the former Soviet republics since the most recent resurgence in use began in Estonia in the early 2000s, and novel derivatives continue to appear.
The Earldom of Carlisle was partitioned into baronies. When the County of Cumberland was created, the baronies were subdivided as wards, a county sub-division also used in Durham, Northumberland and Westmorland. These originated as military subdivisions used to organise the male inhabitants for the county's defence from Scottish troop incursions. Each ward was composed of a number of parishes, areas originally formed for ecclesiastical administration. In common with other northern England counties, many ancient parishes in Cumberland were very large, often consisting of a number of distinct townships and hamlets. Many of these ancient parishes eventually became civil parishes and form the lowest level of local government.
The mouse has since been used extensively as a model organism and is associated with many important biological discoveries of the 20th and 21st centuries. The Jackson Laboratory in Bar Harbor, Maine is currently one of the world's largest suppliers of laboratory mice, supplying around 3 million mice a year. The laboratory is also the world's source for more than 8,000 strains of genetically defined mice and is home of the Mouse Genome Informatics database.
=== Knockout studies === The large number of mouse compared to human FPR receptors makes it difficult to extrapolate human FPR functions based on genetic (e.g. gene knockout or forced overexpression) or other experimental manipulations of the FPR receptors in mice. In any event, combined disruption of the Fpr2 and Fpr3 genes causes mice to mount enhanced acute inflammatory responses as evidenced in three models, intestine inflammation caused by mesenteric artery ischemia-reperfusion, paw swelling caused by carrageenan injection, and arthritis caused by the intraperitoneal injection of arthritis-inducing serum. Since Fpr2 gene knockout mice exhibit a faulty innate immune response to intravenous listeria monocytogenes injection, these results suggest that the human FPR2 receptor and mouse Fpr3 receptor have equivalent functions in dampening at least certain inflammatory response.
Sources: en.wikipedia.org
== Dorsopathies (720–724) == 720 Ankylosing spondylitis and other inflammatory spondylopathies 720.0 Ankylosing spondylitis 720.1 Spinal enthesopathy 720.2 Sacroiliitis 721 Spondylosis and allied disorders 721.0 Cervical spondylosis w/o myelopathy 721.1 Cervical spondylosis, w/myelopathy 721.2 Thoracic spondylosis w/o myelopathy 721.3 Lumbosacral spondylosis w/o myelopathy 721.4 Thoracic or lumbar spondylosis w/ myelopathy 721.5 Kissing spine 721.6 Ankylosing vertebral hyperostosis 721.7 Traumatic spondylopathy 722 Intervertebral disc disorders 722.0 Displacement cervical intervertebral disc 722.1 Lumbar disc displacement w/o myelopathy 722.2 Degeneration of intervertebral disc site unspecified 722.3 Schmorl's nodes 722.4 Degenerative disc disease, cervical 722.5 Degeneration of thoracic or lumbar intervertebral disc 722.51 Degenerative disc disease, thoracic 722.52 Degenerative disc disease, lumbar 722.6 Degeneration of intervertebral disc, site unspecified Degenerative disc disease 722.7 Intervertebral disc disorder with myelopathy 722.8 Postlaminectomy syndrome 723 Other disorders of cervical region 723.0 Spinal stenosis in cervical region 723.1 Cervicalgia 723.2 Cervicocranial syndrome 723.3 Cervicobrachial syndrome (diffuse) 723.4 Brachial neuritis or radiculitis nos 723.5 Torticollis unspecified 723.6 Panniculitis specified as affecting neck 723.7 Ossification of posterior longitudinal ligament in cervical region 724 Other and unspecified disorders of back 724.0 Spinal stenosis, other than cervical 724.1 Pain in thoracic spine 724.2 Lumbago 724.3 Sciatica 724.4 Back pain w/ radiation, unspec. 724.5 Backache, unspecified 724.6 Disorders of sacrum 724.7 Disorders of coccyx 724.79 Coccygodynia 724.8 Other symptoms referable to back
=== Silica === Silica naturally leaches from glass walls and enters water supplies. Dissolved silica, in the form of the silicate anion, can be removed through reverse osmosis or anion exchange. Solid, colloidal silica can be removed via ultrafiltration with or without coagulation to increase particle size.
In October 2014, Shankar announced the production of an unofficial spin-off online series based on the Dark Judges that would be released later that month. The animated miniseries was titled Judge Dredd: Superfiend and all its six episodes were released on 27 October 2014 on YouTube. In March 2015, Garland said that a direct sequel would likely not happen in the near future, at least not with the crew involved in the original film. In 2016, Urban said that "conversations are happening" regarding a Dredd continuation on streaming services Netflix or Amazon Prime. In an interview in May 2016, Urban said that while the film's "mishandled" marketing strategy and "unfortunate" box office performance meant that it was "problematic" to try to make a sequel, "the success it has achieved in all post-theatrical mediums has definitely strengthened the argument in favour of a sequel." In May 2017, a television series named Judge Dredd: Mega-City One was announced to be in development by IM Global Television and Rebellion. In August 2017, Urban stated he was in discussion to star in the series. The series was eventually put on hold due to the pandemic back in 2020. Rebellion CEO Jason Kingsley explained to Radio Times back in 2020, "I want there to be a sequel [to Dredd]. We've got the rights back so we can do it, we've just got to get rid of this virus thing that's going on at the moment, and then hopefully things can kick off in all sorts of different areas of making film and TV, it's just– it's all very messed up at the moment for everybody".
== Sources == Rowland, Malcolm; Tozer, N. (2010). Clinical Pharmacokinetics and Pharmacodynamics: Concepts and Applications (4 ed.). Philadelphia, PA: Lippincott Williams & Wilkins. ISBN 978-0-7817-5009-7. Welling, Peter G.; Tse, Francis L. S.; Dighe, Shrikant V. (1991). Pharmaceutical Bioequivalence. Drugs and the Pharmaceutical Sciences. Vol. 48. New York, NY: Marcel Dekker. ISBN 978-0-8247-8484-3. Hauschke, Dieter; Steinijans, Volker; Pigeot, Iris (2007). "Metrics to characterize concentration-time profiles in single- and multiple-dose bioequivalence studies". Bioequivalence Studies in Drug Development: Methods and Applications. Statistics in Practice. Chichester, UK: John Wiley and Sons. pp. 17–36. ISBN 978-0-470-09475-4. Retrieved 21 April 2011. Chow, Shein-Chung; Liu, Jen-pei (15 October 2008). Design and Analysis of Bioavailability and Bioequivalence Studies. Biostatistics Series. Vol. 27 (3rd ed.). FL: CRC Press. ISBN 978-1-58488-668-6.
Sources: en.wikipedia.org
=== Nanocellulose fibrils === Nanocellulose fibrils (MFC and CNFs) may be isolated from the cellulose fibers using mechanical methods that expose the fibers to high shear forces, delaminating them into nano-fibers. For this purpose, high-pressure homogenizers, grinders or microfluidizers can be used. This process consumes very large amounts of energy and values over 30 MWh/tonne are not uncommon. To address this problem, sometimes enzymatic/mechanical pre-treatments and introduction of charged groups for example through carboxymethylation or TEMPO-mediated oxidation are used. These pre-treatments can decrease energy consumption below 1 MWh/tonne. "Nitro-oxidation" has been developed to prepare carboxycellulose nanofibers directly from raw plant biomass. Owing to fewer processing steps to extract nanocellulose, the nitro-oxidation method has been found to be a cost-effective, less-chemically oriented and efficient method to extract carboxycellulose nanofibers. Functionalized nanofibers obtained using nitro-oxidation have been found to be an excellent substrate to remove heavy metal ion impurities such as lead, cadmium, and uranium. A chemo-mechanical process for production of nanocellulose from cotton linters has been demonstrated with a capacity of 10 kg per day.
Impure welfarists consider additional factors, such as ensuring that well-being is distributed equally among people. This modification aims to avoid situations in which some people have abundantly good lives at the expense of others who experience severe deprivation. Another topic concerns the relation between moral virtue and well-being. According to one view, already considered in ancient Greek philosophy, the two always accompany each other, meaning it is in everyone's self-interest to act virtuously. An alternative perspective denies this close connection, stating that, at least in some cases, a virtuous person has to compromise their own well-being for the greater good. Philosophers further explore the relation between well-being and death. One position questions the common-sense idea that death is generally bad for a person. It argues that since death marks the end of a person's existence, there is nothing that can benefit or harm the person anymore. Animal ethicists apply the concept of well-being to non-human animals, examining what animal well-being consists in and how it affects the moral obligations of humans toward non-human animals. Commonly discussed factors of animal well-being include adequate food, shelter, and social interaction, and the fulfillment of species-specific needs.
The end of the Hundred Years War in 1453 meant that Britain, and thus Bristol, lost its access to Gascon wines and so imports of Spanish and Portuguese wines increased. Imports from Ireland included fish, hides and cloth (probably linen). Exports to Ireland included broadcloth, foodstuffs, clothing and metals. It has been suggested that the decline of Bristol's Iceland trade for 'stockfish' (freeze dried cod) was a hard blow to the local economy, encouraging Bristol merchants to turn west, launching unsuccessful voyages of exploration in the Atlantic by 1480 in search of the phantom island of Hy-Brazil. More recent research, however, has shown that the Iceland trade was never more than a minor part of Bristol's overseas trade and that the English fisheries off Iceland actually increased during the late 15th and 16th centuries. In 1487, when king Henry VII visited the city, the inhabitants complained about their economic decline. Such complaints, however, were not uncommon among corporations that wished to avoid paying taxes, or which hoped to secure concessions from the Crown. In reality, Bristol's customs accounts show that the port's trade was growing strongly during the last two decades of the fifteenth century. In great part this was due to the increase of trade with Spain.
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 REV-ERB agonist used in laboratory research. It is not an approved drug, and its effects in humans are not well characterized. It is often sold as a research chemical under the name Stenabolic.