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 2026-07-06. Numbers and descriptions here follow the published literature rather than marketing material.
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.
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.
| Property | Value | Notes |
|---|---|---|
| Chemical class | Synthetic REV-ERB agonist | Small-molecule nuclear receptor ligand |
| Appearance | Off-white to pale yellow solid | Typical for research-grade powder |
| Solubility class | Soluble in DMSO; low water solubility | Common stock solutions use organic solvent |
| Typical stock solvent | Dimethyl sulfoxide | Used for laboratory assays |
| Common analytical method | HPLC with UV or mass detection | Used for identity and purity checks |
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.
Handling practices for SR9009 focus on minimizing degradation and contamination. The solid is generally stored desiccated at or below -20 °C, protected from light and moisture. Stock solutions are often prepared in dimethyl sulfoxide or ethanol, then aliquoted to avoid repeated freeze–thaw cycles. Aqueous solubility is low, so formulations for animal studies may require cosolvents or suspending agents. Personnel should follow institutional chemical safety procedures, because toxicological data for humans are incomplete.
Regulatory status varies by country and intended use. Major drug agencies have not granted marketing authorization for SR9009 as a medicine, and it is not listed as a controlled substance in many jurisdictions. It is often sold as a research chemical, a category that may fall outside pharmaceutical manufacturing rules. Buyers should verify local laws and supplier documentation, including certificates of analysis. The lack of standardized quality controls raises concerns about identity, purity, and actual content in products marketed online.
In laboratory settings, SR9009 is commonly identified by its molecular structure and its interaction with REV-ERB receptors. Vendors may list it under synonyms such as Stenabolic or REV-ERB agonist, but those names do not define purity or identity. Analytical confirmation typically uses high-performance liquid chromatography with ultraviolet detection or liquid chromatography–mass spectrometry. A reference standard is needed to compare retention time and mass spectrum, because the compound can be confused with related research chemicals.
"Fight! Wildcats! Fight!" is the official fight song of the UA. While "Bear Down, Arizona!" is the more recognizable fight song attributed to the university, it was written 23 years after "Fight!" and is now described as the official motto of the Arizona Wildcats. In 1952 Jack K. Lee, the new director of the UA's band, saw the words "BEAR DOWN" written on the university's gymnasium and was inspired to create the music and lyrics for a fight song by that name. The UA fans were delighted when the song was played during athletic events, and "Bear Down, Arizona!" became accepted as the unofficial fight song.
== Further reading == Greer, William R.; Logan, John A.; Willis, Paul S. (1986). America the Bountiful: How the Supermarket Came to Main Street : an Oral History. Washington, D.C.: Food Marketing Institute in cooperation with Beatrice Companies. OCLC 14357784. Longstreth, R. W. (1999). The Drive-In, the Supermarket, and the Transformation of Commercial Space in Los Angeles, 1914-1941. The MIT Press. Lorr, B. (2020). The Secret Life of Groceries: The Dark Miracle of the American Supermarket. Avery. Newman, K. (2012). The Secret Financial Life of Food: From Commodities Markets to Supermarkets (Illustrated edition). Columbia University Press. Petroski, Henry (November–December 2005). "Shopping by Design". American Scientist 93 (6): 491. Sowell, Thomas. Basic Economics (Third Edition, 2007 Basic Books). Pages 92–94 describe the competition between the dominant grocery chains in the United States through the 20th century and beyond. Yee, A. (2003). Shopping at Giant Foods: Chinese American Supermarkets in Northern California (Illustrated edition). University of Washington Press.
=== August === August 6, 2010: Canada From April to June, Canada added a massive 225,000 jobs, over half of all of the year-over-year gains since July 2009, which has nearly brought Canada's employment to pre-recession levels. Now that growth is beginning to normalize, employment and gross domestic product growth paused in July. Canada's economy shed 9,000 jobs, pushing the employment rate up slightly to 8.0%. The 139,000 full-time jobs lost were largely offset by the 130,000 gained in part-time employment.
Hepatocyte growth factor (HGF) or scatter factor (SF) is a paracrine cellular growth, motility and morphogenic factor. It is secreted by mesenchymal cells and targets and acts primarily upon epithelial cells and endothelial cells, but also acts on haemopoietic progenitor cells and T cells. It has been shown to have a major role in embryonic organ development, specifically in myogenesis, in adult organ regeneration, and in wound healing.
Sources: en.wikipedia.org
=== Protein purification === When purifying protein from a biological extract, streptomycin sulfate is sometimes added as a means of removing nucleic acids and ribonuclear proteins. Since it binds to ribosomes and precipitates out of solution, it serves as a method for removing rRNA, mRNA, and even DNA if the extract is from a prokaryote.
== Bibliography == Audi, G.; Kondev, F. G.; Wang, M.; et al. (2017). "The NUBASE2016 evaluation of nuclear properties". Chinese Physics C. 41 (3) 030001. Bibcode:2017ChPhC..41c0001A. doi:10.1088/1674-1137/41/3/030001. Beiser, A. (2003). Concepts of modern physics (6th ed.). McGraw-Hill. ISBN 978-0-07-244848-1. OCLC 48965418. Hoffman, D. C.; Ghiorso, A.; Seaborg, G. T. (2000). The Transuranium People: The Inside Story. World Scientific. ISBN 978-1-78-326244-1. Kragh, H. (2018). From Transuranic to Superheavy Elements: A Story of Dispute and Creation. Springer. ISBN 978-3-319-75813-8. Zagrebaev, V.; Karpov, A.; Greiner, W. (2013). "Future of superheavy element research: Which nuclei could be synthesized within the next few years?". Journal of Physics: Conference Series. 420 (1) 012001. arXiv:1207.5700. Bibcode:2013JPhCS.420a2001Z. doi:10.1088/1742-6596/420/1/012001. ISSN 1742-6588. S2CID 55434734.
Hours after the capture, the United States attorney general Pam Bondi announced that Maduro and Flores had been indicted in the Southern District of New York on charges related to "narcoterrorism". The indictment listed the charges as narco-terrorism conspiracy, cocaine importation conspiracy, possession of machine guns and destructive devices, and conspiracy to possess machine guns and destructive devices. The amended indictment did not refer to the Cartel of the Suns as an organized group as previously alleged by the US, but instead as a corrupt patronage system, which aligns with experts' descriptions of its operations. Maduro and his wife were arraigned in a Manhattan federal court on 5 January 2026. Before pleading, Maduro said: "I am the president of Venezuela, I consider myself a prisoner of war. I was captured at my home in Caracas." Both pleaded not guilty to numerous drug trafficking charges. US District Judge Alvin Hellerstein ordered that Maduro be held at least until a hearing. Originally scheduled for 17 March, the hearing was delayed to 26 March. Maduro and Flores appeared in court for it, then were transferred back to jail in Brooklyn. Maduro is reportedly spending most of his time in prison reading the Bible. He does not have access to newspapers or the internet in prison, but he is allowed to speak by telephone with his family and lawyers for approximately 300 minutes a month, with a maximum of 15 minutes per call. Their trial was scheduled for 1 June 2027.
Sources: en.wikipedia.org
18 hours) in CYP2D6 poor metabolizers versus CYP2D6 extensive metabolizers. Circulating 4-hydroxyatomoxetine levels are about 1% of those of circulating atomoxetine levels in CYP2D6 extensive metabolizers and about 0.1% of those of circulating atomoxetine levels in CYP2D6 poor metabolizers. Similarly, N-desmethylatomoxetine circulates at much lower levels than atomoxetine, about 5% of those of atomoxetine in CYP2D6 extensive metabolizers and 45% of those of atomoxetine in CYP2D6 poor metabolizers. 4-Hydroxyatomoxetine shows similar affinity for the norepinephrine transporter (NET) as atomoxetine but much higher affinity for the serotonin transporter (SERT) in comparison (with SERT affinity ~14-fold lower than NET affinity), whereas N-desmethylatomoxetine shows much lower affinity for the monoamine transporters (MATs) than atomoxetine and 4-hydroxyatomoxetine (with NET affinity ~20-fold lower than that of atomoxetine). Despite differences in atomoxetine metabolism, CYP2D6 status has been said in literature reviews to not affect the overall tolerability and safety of atomoxetine. However, poor metabolizers did show greater heart rate increase (+9.4–11 bpm vs. +5.0–7.5 bpm), blood pressure increase (4.21 mm Hg vs. 2.13 mm Hg systolic and 2.75 mg Hg vs. 2.40 mm Hg diastolic), and more weight loss (–1.2 kg vs. +0.8 mg) than extensive metabolizers.
== Further reading == Hall E, Wodi AP, Hamborsky J, Morelli V, Schillie S, eds. (2021). "Chapter 20: Rubella". Epidemiology and Prevention of Vaccine-Preventable Diseases (14th ed.). Washington D.C.: U.S. Centers for Disease Control and Prevention (CDC).
Abuse of fenethylline using the former brand name Captagon is common in the Middle East, and counterfeit versions of the drug continue to be available despite its illegality. Fenethylline is much less common outside of the Middle East, to the point that police may not recognize the drug. Fenethylline production and export were a significant industry sponsored by Bashar al-Assad's government, with revenue from its exports contributing more than 90% of its foreign currency. After the fall of al-Assad's government in Syria, Captagon trade fell by around 90%. The Assad regime's annual fenethylline revenues were estimated to have been worth US$57 billion in 2022, about three times the total trade of the entire Mexican illicit drug market. Later research demonstrated that this assistance, largely the financing of production and sponsoring networks of drug dealers, was undertaken through the former Assad regime's Military Intelligence Directorate (Syria). In July 2019 in Lebanon, captagon was sold for $1.50 to $2.00 a pill. In 2021 in Syria, low-quality pills were sold locally for less than $1, while high-quality pills are increasingly smuggled abroad and may cost upwards of $14 each in Saudi Arabia. Many of these counterfeit "Captagon" tablets contain other amphetamine derivatives that are easier to produce, but are pressed and stamped to look like Captagon pills. Some counterfeit Captagon pills analysed do contain fenethylline, indicating that illicit production of the drug continues to take place.
=== In medicine === Many hospitals have pneumatic tube systems which send samples to laboratories. Blood preservations are transported, where weight and transport duration matter as well as preventing haemolysis caused by centrifugal and accelerating forces. Pneumatic tube systems are also used in hospitals to transport X-rays, patient documents, general documents, drugs and test results. 6-inch (152 mm) pneumatic tube systems have been shown to handle heavy liter-capacity IV bags with significantly fewer jams compared to the 4-inch (102 mm) systems.
Sources: en.wikipedia.org
SR9009 is a synthetic research compound that acts on REV-ERB nuclear receptors. It is not approved for human use and is sold only as a research chemical. Its effects have been studied mainly in cells and rodents.
It binds REV-ERB alpha and REV-ERB beta and changes the expression of genes tied to metabolism and circadian rhythm. These changes can affect mitochondria and energy use in animal models. The exact chain from receptor binding to physiological outcome is still being mapped.
No reliable human trials show that SR9009 improves athletic performance. Some rodent studies report endurance changes, but these results are not proof of human benefit. Its use in sport is prohibited, and quality and safety data are lacking.
SR9009 is a synthetic compound investigated as an agonist of the nuclear receptors REV-ERBα and REV-ERBβ. It is used in preclinical research on circadian rhythm and metabolism. It is not an approved drug.