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 2026-07-24. Where a claim depends on a specific study, the study is described rather than over-claimed.
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.
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.
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.
| 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. |
For long-term storage, SR9009 is typically kept as a solid at low temperature, protected from moisture and light. Desiccated conditions limit hydrolysis, while opaque containers reduce photochemical breakdown. Solutions are less stable than solids and are often stored frozen in aliquots to avoid repeated freeze-thaw cycles. Stability data are not standardized across all suppliers, so users should rely on certificate-of-analysis information when available. Degradation may appear as color change, precipitate, or decreased chromatographic purity.
Laboratory identification of SR9009 typically relies on chromatographic separation coupled to mass spectrometry, often with ultraviolet detection as a secondary check. Nuclear magnetic resonance spectroscopy can confirm molecular structure when a reference standard is available. Because many suppliers sell the compound as a research chemical, independent identity testing is important for experimental reproducibility. A single retention time is not sufficient proof of identity, especially when related compounds may be present. Purity assessments usually report a percentage based on area normalization.
SR9009 is generally described as poorly soluble in water and more soluble in organic solvents such as dimethyl sulfoxide and ethanol. Stock solutions are commonly prepared in an organic solvent before dilution into an aqueous buffer or vehicle. Precipitation can occur if the organic fraction is reduced too quickly or if the final concentration exceeds the compound's solubility limit. Sonication or gentle warming may aid dissolution in some protocols, but excessive heat can promote degradation. Container material and pH can also influence observed solubility.
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.
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.
was conserved so long as the masses did not interact. He called this quantity the vis viva or living force of the system. The principle represents an accurate statement of the approximate conservation of kinetic energy in situations where there is no friction. Many physicists at that time, including Isaac Newton, held that the conservation of momentum, which holds even in systems with friction, as defined by the momentum:
=== Culinary === Shallots are used in cooking. They may be pickled. Finely sliced, deep-fried shallots are used as a condiment in Asian cuisine, often served with porridge. Shallots taste similar to other cultivars of the common onion, but have a milder flavor. Like onions, when sliced, raw shallots release substances that irritate the human eye, resulting in production of tears. Fresh shallots can be stored in a cool, dry area (0 to 4 °C, 32 to 40 °F, 60 to 70% RH) for six months or longer. Chopped, dried shallots are available.
=== Carbamylated proteins === Within nature carbon dioxide can bind with neutral amine groups to form a carbamate. This post-translational modification is known as carbamylation, and is known to occur on several important proteins. The N-terminal amino groups of valine residues in the α- and β-chains of deoxyhemoglobin exist as carbamates. They help to stabilise the protein when it becomes deoxyhemoglobin, and increases the likelihood of the release of remaining oxygen molecules bound to the protein. This stabilizing effect should not be confused with the Bohr effect (an indirect effect caused by carbon dioxide). The ε-amino groups of the lysine residues in urease and phosphotriesterase also feature carbamate.
=== Young Investigator (YI) Post-Doctoral Programme === (RCB-YI award) has been initiated to nurture outstanding recent PhDs with innovative ideas and the drive to pursue novel discoveries under the mentorship of RCB faculty. RCB-YI award has been instituted for both Indian and Foreign nationals on the competitive basis with initial appointment for three years which is extendable on rigorous review for additional two years.
Sources: en.wikipedia.org
Contaminants of emerging concern (CEC) is a term used by water quality professionals to describe pollutants that have been detected in environmental monitoring samples, that may cause ecological or human health impacts, and typically are not regulated under current environmental laws. Sources of these pollutants include agriculture, urban runoff and ordinary household products (such as soaps and disinfectants) and pharmaceuticals that are disposed to sewage treatment plants and subsequently discharged to surface waters. CEC include different substances like pharmaceuticals, personal care products, industrial byproducts, and agricultural chemicals. These substances often bypass regular detection and treatment processes, leading to their unintended persistence in the environment. The complexity of CEC arises not only from their different chemical nature but also from the complex ways they interact with ecosystems and human health. As such, they are the focus of increasing examination by researchers, policymakers, and public health officials who want to understand their long-term effects and develop effective interventions. Global initiatives, like those from the World Health Organization (WHO) and the United States Environmental Protection Agency (US EPA), emphasize the need to create international standards and effective environmental policies to address the challenges posed by CEC.
=== Biomechanical, sensory, and physiological properties of the body-wide fascia network === Chaudhry, H.; Huang, C.V.; Schleip, R.; Ji, Z.; Bukiet, B.; Findley, T. (2007). "Viscoelastic behavior of human fasciae under extension in manual therapy". Journal of Bodywork and Movement Therapies. 11 (2): 159–167. doi:10.1016/j.jbmt.2006.08.012. Schleip, R.; Duerselen, L.; Vleeming, A.; Naylor, I.L.; Lehmann-Horn, F.; Zorn, A.; Jaeger, H.; Klingler, W. (2012). "Strain hardening of fascia: Static stretching of dense fibrous connective tissues can induce a temporary stiffness increase accompanied by enhanced matrix hydration". Journal of Bodywork and Movement Therapies. 16 (1): 94–100. doi:10.1016/j.jbmt.2011.09.003. PMID 22196433. Schleip, R.; Mechsner, F.; Zorn, A.; Klingler, W. (2014). "The bodywide fascial network as a sensory organ for haptic perception". Journal of Motor Behavior. 46 (3): 191–193. doi:10.1080/00222895.2014.880306. PMID 24628059. Schleip, R.; Zorn, A.; Klingler, W. (2014). "Clinical relevance of fascial tissue and dysfunctions". Current Pain and Headache Reports. 18 (8): 439. doi:10.1007/s11916-014-0439-y. PMID 24962403.
Voltage-gated ion channels are capable of producing action potentials because they can give rise to positive feedback loops: the membrane potential controls the state of the ion channels, and the state of the ion channels controls the membrane potential. Thus, in some situations, a rise in the membrane potential can cause ion channels to open, thereby causing a further rise in the membrane potential. An action potential occurs when this positive feedback cycle proceeds explosively. The time and amplitude trajectory of the action potential are determined by the biophysical properties of the voltage-gated ion channels that produce it. Several types of channels capable of producing the positive feedback necessary to generate an action potential do exist. Voltage-gated sodium channels are responsible for the fast action potentials involved in nerve conduction. Slower action potentials in muscle cells and some types of neurons are generated by voltage-gated calcium channels. Each of these types comes in multiple variants, with different voltage sensitivity and different temporal dynamics. The most intensively studied type of voltage-dependent ion channels comprises the sodium channels involved in fast nerve conduction. These are sometimes known as Hodgkin-Huxley sodium channels because they were first characterized by Alan Hodgkin and Andrew Huxley in their Nobel Prize-winning studies of the biophysics of the action potential, but can more conveniently be referred to as NaV channels.
[PtCl4]2- + 2 H2NCH(R)CO2− → [Pt(H2NCH(R)CO2)2] + 4 Cl− Relevant to bioinorganic chemistry, amino acid complexes can be generated by the hydrolysis of amino acid esters and amides (en = ethylenediamine):
Based on Moseley and Siegbahn's research, it was also known which atomic numbers corresponded to missing elements yet to be found: 43, 61, 72, 75, 85, and 87. (Element 75 had in fact already been found by Japanese chemist Masataka Ogawa in 1908 and named nipponium, but he mistakenly assigned it as element 43 instead of 75 and so his discovery was not generally recognized until later. The contemporarily accepted discovery of element 75 came in 1925, when Walter Noddack, Ida Tacke, and Otto Berg independently rediscovered it and gave it its present name, rhenium.) The dawn of atomic physics also clarified the situation of isotopes. In the decay chains of the primordial radioactive elements thorium and uranium, it soon became evident that there were many apparent new elements that had different atomic weights but exactly the same chemical properties. In 1913, Frederick Soddy coined the term "isotope" to describe this situation, and considered isotopes to merely be different forms of the same chemical element. This furthermore clarified discrepancies such as tellurium and iodine: tellurium's natural isotopic composition is weighted towards heavier isotopes than iodine's, but tellurium has a lower atomic number.
Sources: en.wikipedia.org
The stigma placed on mental health makes many men believe showing signs of vulnerability could be considered weak. Men experience immense amounts of internalized stigma from societal expectations, causing symptoms such as isolation, depression, anxiety, and resistance to treatment.
To reduce the cost to the military of maintaining stockpiles of certain pharmaceuticals, the United States Department of Defense (DoD) and the Food and Drug Administration (FDA) operate a joint initiative known as the Shelf Life Protection Program (SLEP), which evaluates the long-term effectiveness of medications stockpiled by the DoD and other government agencies. Under the program, medications are tested for safety and stability for extended periods of time in controlled storage conditions. In many cases, medications tested were found to be effective for years past their printed expiry dates; a 2006 study by the Journal of Pharmaceutical Sciences found that two-thirds of 122 medications tested through SLEP remained effective for an average of at least four additional years. In 2016, the DoD reported that the program had helped save the department US$2.1 billion on replacing stockpiled medications. While testing and stability assessment found that 88% of the lots were effective at least one year after their expiration date, with an average extension of 66 months, the additional stability period was very variable. For antibiotics studied, the mean extension for ciprofloxacin was 55 months, and for amoxicillin 23 months.
Field desorption refers to an ion source in which a high-potential electric field is applied to an emitter with a sharp surface, such as a razor blade, or more commonly, a filament from which tiny "whiskers" have formed. This results in a very high electric field which can result in ionization of gaseous molecules of the analyte. Mass spectra produced by FI have little or no fragmentation. They are dominated by molecular radical cations M+. and less often, protonated molecules [M + H]+
==== Newsletter ==== The IIR produces an electronic monthly newsletter that features news and updates on the refrigeration sector: regulation, events, economic data, monitoring, technological progress, etc. It provides a detailed overview of the general developments within the sector worldwide and as acts a regular information tool for readers.
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.
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.