Stenabolic 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 2025-10-28. Numbers and descriptions here follow the published literature rather than marketing material.
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.
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.
REV-ERB proteins typically suppress gene expression by recruiting corepressor complexes to DNA response elements. SR9009 binds these receptors and strengthens that repressive action in cell-based assays. Studies in rodents have reported changes in lipid handling, mitochondrial function, and exercise capacity after treatment. Such findings are often cited as evidence for metabolic effects, but species differences and limited pharmacokinetic data make direct translation to humans uncertain. Researchers continue to examine which effects are robust and which depend on specific experimental conditions.
SR9009 is frequently discussed alongside other REV-ERB ligands, including synthetic agonists and natural heme-related molecules. Its selectivity for REV-ERB over related nuclear receptors has been measured in binding and reporter assays, though off-target activity at higher concentrations is possible. The compound is prohibited in sport by the World Anti-Doping Agency, and it is not approved for any medical use in major jurisdictions. Products sold online may be labeled as research chemicals, and their identity and purity are not guaranteed by regulatory review.
| 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 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.
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.
Regulatory and sporting contexts treat SR9009 as a prohibited substance in many elite competitions. Its presence on banned lists reflects concerns about performance enhancement and unknown long-term safety. Analytical chemists have developed methods to detect the parent compound and its metabolites in urine and blood. Literature discussions distinguish between in vitro potency, animal pharmacology, and anecdotal human reports. The latter are difficult to verify because products sold online may lack purity or contain different compounds.
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, lipid metabolism, and inflammatory gene expression. In cell and animal experiments, SR9009 alters transcription of clock-controlled genes and metabolic pathways. The compound is not a hormone and does not resemble classical steroid structures. Its activity depends on binding to the ligand-binding domain of REV-ERB, where it can modify corepressor recruitment.
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.
The efficacy of quinacrine was assessed in a rigorous clinical trial in the UK and the results were published in Lancet Neurology, and concluded that quinacrine had no measurable effect on the clinical course of CJD. Astemizole, a medication approved for human use, has been found to have anti-prion activity and may lead to a treatment for Creutzfeldt–Jakob disease. A monoclonal antibody (code name PRN100) targeting the prion protein (PrP) was given to six people with Creutzfeldt–Jakob disease in an early-stage clinical trial conducted from 2018 to 2022. The treatment appeared to be well-tolerated and was able to access the brain, where it might have helped to clear PrPC. While the treated patients still showed progressive neurological decline, and while none of them survived longer than expected from the normal course of the disease, the scientists at University College London who conducted the study see these early-stage results as encouraging and suggest conducting a larger study, ideally at the earliest possible intervention.
The Bentley compounds are a class of semi-synthetic opioids that were first synthesized by K. W. Bentley by Diels-Alder reaction of thebaine with various dienophiles. The compounds are also known as thevinols, orvinols, or bridged oripavine derivatives, due to the characteristic 6,14-endo-ethano- or etheno-bridge and substitution at the 7α position. Buprenorphine and etorphine are perhaps the best known of the family, which was the first series of extremely potent μ-opioid agonists, with some compounds in the series having over many thousands of times the analgesic potency of morphine.
== Operations and technology == By 2015, Lineage's facility network was ranked the second-largest in the world by the International Association of Refrigerated Warehouses. With 111 facilities in 21 states, Lineage also ranked as the second largest temperature-controlled warehousing and logistics company in the United States. In September 2020, Lineage raised $1.6 billion in equity for technology and expansion. In March 2021, Lineage raised $1.9 billion in equity for global greenfield developments, facility expansions, M&A and research and development. In July 2021, Lineage partnered with 8VC logistics technology venture capital firm, to further invest in the transportation and logistics technology sector.
A study skin is a taxidermic zoological specimen prepared in a minimalistic fashion that is concerned only with preserving the animal's skin, not the shape of the animal's body. As the name implies, study skins are used for scientific study (research), and are housed mainly by museums. A study skin's sole purpose is to preserve data, not to replicate an animal in a lifelike state. Museums keep large collections of study skins in order to conduct comparisons of physical characteristics to other study skins of the same species. Study skins are also kept because DNA can be extracted from them when needed at any point in time. A study skin's preparation is extremely basic. After the animal is skinned, fat is methodically scraped off the underside of the hide. The underside of the hide is then rubbed with borax or cedar dust to help it dry faster. The animal is then stuffed with cotton and sewn up. Mammals are laid flat on their belly. Birds are prepared lying on their back. Study skins are dried in these positions to keep the end product as slender and streamlined as possible so large numbers of specimens can be stored side-by-side in flat file drawers, while occupying a minimum amount of space. Since study skins are not prepared with aesthetics in mind they do not have imitation eyes like other taxidermy, and their cotton filling is visible in their eye openings.
Sources: en.wikipedia.org
molecular genetics A branch of genetics that employs methods and techniques of molecular biology to study the structure and function of genes and gene products at the molecular level. Contrast classical genetics.
==== Quantification ==== Polyphenolic content in vitro can be quantified by volumetric titration. An oxidizing agent, permanganate, is used to oxidize known concentrations of a standard tannin solution, producing a standard curve. The tannin content of the unknown is then expressed as equivalents of the appropriate hydrolyzable or condensed tannin. Some methods for quantification of total polyphenol content in vitro are based on colorimetric measurements. Some tests are relatively specific to polyphenols (for instance the Porter's assay). Total phenols (or antioxidant effect) can be measured using the Folin–Ciocalteu reaction. Results are typically expressed as gallic acid equivalents. Polyphenols are seldom evaluated by antibody technologies. Other tests measure the antioxidant capacity of a fraction. Some make use of the ABTS radical cation which is reactive towards most antioxidants including phenolics, thiols and vitamin C. During this reaction, the blue ABTS radical cation is converted back to its colorless neutral form. The reaction may be monitored spectrophotometrically. This assay is often referred to as the Trolox equivalent antioxidant capacity (TEAC) assay. The reactivity of the various antioxidants tested are compared to that of Trolox, which is a vitamin E analog. Other antioxidant capacity assays which use Trolox as a standard include the diphenylpicrylhydrazyl (DPPH), oxygen radical absorbance capacity (ORAC), ferric reducing ability of plasma (FRAP) assays or inhibition of copper-catalyzed in vitro human low-density lipoprotein oxidation.
=== 24 May === Ukrainian authorities ordered the mandatory evacuation of 123 children from 36 settlements in Kharkiv Oblast due to Russian attacks. The United States sent another military aid package for Ukraine, valued at $275 million. It included HIMARS, munitions, 155 mm and 105 mm high-demand artillery rounds, Javelin and AT4 antitank systems, antitank mines, tactical vehicles, small arms and ammunition. The Ukrainian Air Force announced that it had begun using air dropped Small Diameter Bombs, which had "proved resilient to jamming" and had a "nearly 90 percent" accuracy rate, since November 2023.
== Mass spectrometry == Radical cations appear prominently in mass spectrometry. When a gas-phase molecule is subjected to electron ionization one electron is abstracted by an electron in the electron beam to create a radical cation M+.. This species represents the molecular ion or parent ion. A typical mass spectrum shows multiple signals because the molecular ion fragments into a complex mixture of ions and uncharged radical species. For example, the methanol radical cation fragments into a methenium cation CH+3 and a hydroxyl radical. In naphthalene the unfragmented radical cation is by far the most prominent peak in the mass spectrum. Secondary species are generated from proton gain (M+1) and proton loss (M-1).
Conversely, the catabolic effect was much less in an older male, and no such effect was observed in adult females consuming a diet with sufficient calories and protein. The catabolic effects of CPA were found to be greater than those of corticosteroids. Although higher doses of CPA are necessary for considerable systemic AR antagonistic activity, it is notable that even low doses of oral CPA appear to be able to significantly antagonize AR signaling in the liver in women. This may be related to the hepatic first-pass effect of oral administration, and is evidenced by the fact that whereas combined birth control pills containing CPA increase SHBG levels by 300 to 400%, combined birth control pills containing various other progestins, with either androgenic or antiandrogenic activity, increase SHBG levels by only 50 to 300%. This is relevant as estrogens stimulate hepatic SHBG production while androgens inhibit hepatic SHBG production, and vice versa for their antagonists. The antiandrogenic activity of CPA may also be responsible for the relatively greater risk of venous thromboembolism with CPA-containing birth control pills compared to those containing other progestins. In rats, a dosage of CPA of 25 mg/kg/day results in complete regression of prostate gland growth in gonadally intact males. The equivalent dosage in humans, on the basis of body surface (conversion factor from rat to human of 6), was estimated to be approximately 4 mg/kg/day, or around 300 mg/day CPA for a 75 kg (165 lb) man.
Sources: en.wikipedia.org
== Awards and honors == Wadden has received recognition from professional societies and universities throughout his career. Early honors included the President’s New Researcher Award from the Association for the Advancement of Behavior Therapy (1986). He was later elected a Fellow of the Academy of Behavioral Medicine Research (1992), Society of Behavioral Medicine (1995), College of Physicians of Philadelphia (2000), and the Obesity Society (2002). Subsequent honors included the Distinguished Alumni Award from the University of North Carolina at Chapel Hill (2007), the Arthur K. Asbury Outstanding Faculty Mentor Award from the University of Pennsylvania (2007), the George A. Bray Founder's Award (2009), and the TOPS Research Achievement Award (2012), both from the Obesity Society. Other honors included the Bud Orgel Award for Distinguished Achievement in Research (2012) and the inaugural Thomas A. Wadden Award for Distinguished Mentorship from The Obesity Society (2015). Later recognitions included an honorary Doctor of Humane Letters from the Philadelphia College of Osteopathic Medicine (2019), designation as a “distinguished leader in obesity medicine” by the American Board of Obesity Medicine (2021), the Friends of Albert (Mickey) Stunkard Lifetime Achievement Award from The Obesity Society (2022), and the George Bray Outstanding Achievements Award in Obesity Research from the American Society for Nutrition (2025).
== Directed self-assembly == Directed self-assembly (DSA) is a type of directed assembly which utilizes block co-polymer morphology to create lines, space and hole patterns, facilitating for a more accurate control of the feature shapes. Then it uses surface interactions as well as polymer thermodynamics to finalize the formation of the final pattern shapes. To control the surface interactions enabling sub-10 nm resolution, a team consisting of Massachusetts Institute of Technology, University of Chicago, and Argonne National Laboratory developed a way to use vapor-phase deposited polymeric top layer on the block co-polymer film in 2017. The DSA is not a standalone process, but rather is integrated with traditional manufacturing processes in order to mass-produce micro and nano structures at a lower cost. Directed self-assembly is mostly used in the semiconductor and hard drive industries. The semiconductor industry uses this assembly method in order to be able increase the resolution (trying to fit in more gates), while the hard drive industry uses DSA to manufacture "bit patterned media" according to the specified storage densities.
=== Relationship with the Federation === Federalism is one of the entrenched constitutional principles of Germany. Accordingly, the states form a considerable counterweight to the power of the federation. In principle, the power to enact laws lies with the states; the federation can only enact its own laws if the Basic Law explicitly assigns it legislative powers in the respective area. This can be done in two ways:
== Research directions == Current research and recommendations to manage severe acute malnutrition (SAM), such as kwashiorkor, in children, are largely based on expert opinions. Only one-third of the WHO guidelines for the management of SAM are based on epidemiological and clinical research. Further studies are needed to "improve treatment outcomes in the large number of children with SAM."
=== Serotonin precursors === The serotonin precursors tryptophan and 5-hydroxytryptophan (5-HTP; oxitriptan) are available as over-the-counter supplements. They are often used to produce sleepiness and treat insomnia. However, little to no clinical data exist to support their use or effectiveness.
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.
SR9009 is a synthetic research compound that binds and modulates the nuclear receptors REV-ERBα and REV-ERBβ. It is used in laboratory studies of circadian biology and metabolism, not as an approved medicine. It is also known by the informal name Stenabolic.