The short version of LC-MS/MS fits in a sentence. The long version — which is the one that helps — is below.
This page was last updated on 2026-08-01 and is reviewed periodically as new material appears.
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.
Laboratory studies often administer SR9009 by injection because oral absorption appears poor in rodents. Reported pharmacokinetic properties include rapid metabolism and low systemic exposure after oral dosing. Human pharmacokinetic data are sparse, so absorption, distribution, metabolism, and excretion in people are not well defined. Some research explores related REV-ERB compounds with improved drug-like properties. Regulatory approval for any REV-ERB agonist as a human medicine has not been granted to date.
SR9009 is a synthetic small molecule studied as an agonist of the nuclear receptors REV-ERBα and REV-ERBβ, also called NR1D1 and NR1D2. These receptors help regulate circadian rhythms and metabolic gene programs. The compound was developed for laboratory research, not as an approved therapeutic. Its identity is distinct from steroid hormones and selective androgen receptor modulators. Scientific interest centers on how REV-ERB activation changes gene expression in cells and animal models.
At the molecular level, SR9009 binds the ligand-binding domain of REV-ERB and strengthens recruitment of corepressor proteins such as NCoR and HDAC3. This increases repression of target genes, including Bmal1 and other clock-controlled and metabolic genes. In rodent studies, such changes have been linked to altered lipid handling, glucose metabolism, and energy expenditure. The precise chain of events between receptor binding and whole-body effects remains an active area of research. Findings in animals do not automatically translate to humans.
| 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 |
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.
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.
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.
Ground calcium carbonate is an abrasive (both as scouring powder and as an ingredient of household scouring creams), in particular in its calcite form, which has the relatively low hardness level of 3 on the Mohs scale, and will therefore not scratch glass and most other ceramics, enamel, bronze, iron, and steel, and have a moderate effect on softer metals like aluminium and copper. A paste made from calcium carbonate and deionized water can be used to clean tarnish on silver.
== See also == Barbro Hjalmarsson Biomarker (medicine), a protein or other biomolecule measured in a blood test Blood film, a way to look at blood cells under a microscope Blood gas test Blood lead level Hematology – Study of blood and blood diseases Luminol, a visual test for blood left at crime scenes. Reference ranges for blood tests Schumm test – Test for blood mismatch Category:Blood tests List of medical tests
As early as the late 18th century and early 19th century, the digestion of meat by stomach secretions and the conversion of starch to sugars by plant extracts and saliva were known. However, the mechanism by which this occurred had not been identified. In the 19th century, when studying the fermentation of sugar to alcohol by yeast, Louis Pasteur concluded that this fermentation was catalyzed by a vital force contained within the yeast cells called ferments, which he thought functioned only within living organisms. He wrote that "alcoholic fermentation is an act correlated with the life and organization of the yeast cells, not with the death or putrefaction of the cells." In 1833 Anselme Payen discovered the first enzyme, diastase, and in 1878 German physiologist Wilhelm Kühne (1837–1900) coined the term enzyme, which comes from Greek ενζυμον 'in leaven', to describe this process. The word enzyme was used later to refer to nonliving substances such as pepsin, and the word ferment was used to refer to chemical activity produced by living organisms. In 1897 Eduard Buchner began to study the ability of yeast extracts to ferment sugar despite the absence of living yeast cells. In a series of experiments at the University of Berlin, he found that the sugar was fermented even when there were no living yeast cells in the mixture. He named the enzyme that brought about the fermentation of sucrose zymase. In 1907 he received the Nobel Prize in Chemistry "for his biochemical research and his discovery of cell-free fermentation".
Mephenoxalone (trade names Dorsiflex, Moderamin, Control-OM) is a muscle relaxant and mild anxiolytic. It inhibits neuron transmission, relaxing skeletal muscles by inhibiting the reflex arc. As the effect of muscle relaxation, mephenoxalone affects mental condition, and is also a treatment for nervousness and anxiety.
Electromagnetic radiation travels, when unobstructed, at the speed of light, the defined value 299,792,458 m/s in SI units. The superposition principle is always exactly true. For example, the electric potential generated by two charges is the simple addition of the potentials generated by each charge in isolation. The value of the electric field at any point around these two charges is found by calculating the vector sum of the two electric fields from each of the charges acting alone. The permittivity and permeability are exactly the electric constant ε0 and magnetic constant μ0, respectively (in SI units), or exactly 1 (in Gaussian units). The characteristic impedance (η) equals the impedance of free space Z0 ≈ 376.73 Ω. The vacuum of classical electromagnetism can be viewed as an idealized electromagnetic medium with the constitutive relations in SI units:
Sources: en.wikipedia.org
Sunak later announces that the UK will send Ukraine hundreds of air defence missiles and armed drones, in addition to the Storm Shadow cruise missiles previously promised. 16 May Following a trial at Reading Crown Court, three fraudsters who supplied forged passports to some of the UK's most notorious criminals, are sentenced to prison. Data produced by the Office for National Statistics indicates the number of people not working because of a long-term health condition has reached two and a half million. The rise is attributed to an increase in mental health problems among young people, and an increase in people suffering back and neck problems as a result of working at home. Stellantis, owners of Vauxhall, Peugeot, Citroen and Fiat, urge the UK government to renegotiate parts of its Brexit trade deal, warning that the UK could lose its car industry. The company has committed to making electric vehicles in the UK, but says it may not be able to do so because of the combined effect of post-Brexit trade rules and increases in raw material costs. 17 May The Renters (Reform) Bill is introduced into Parliament. The UK government bans the issuing of licences for animal testing of chemicals used in cosmetics products. 18 May 2023 Northern Ireland local elections: Local elections are held in Northern Ireland, two weeks after the rest of the country. Figures released by HM Treasury indicate the funeral of Elizabeth II and associated events cost the UK government £162m. 19 May John Allan announces he is stepping down as chairman of Tesco following allegations over his conduct.
Glucokinase (EC 2.7.1.2) is an enzyme that facilitates phosphorylation of glucose to glucose-6-phosphate. In medicine, the term is often used to refer to a specific hexokinase found in vertebrates and coded by the gene GCK in humans, but the EC number 2.7.1.2 (glucokinase) refers instead to an even more glucose-specific enzyme found in invertebrates and microorganisms. Unless otherwise specified, this article will be discussing the vertebrate enzyme. Glucokinase is expressed in cells of the liver and pancreas of humans and most other vertebrates. In each of these organs it plays an important role in the regulation of carbohydrate metabolism by acting as a glucose sensor, triggering shifts in metabolism or cell function in response to rising or falling levels of glucose, such as occur after a meal or when fasting. Mutations of the gene for this enzyme can cause unusual forms of diabetes or hypoglycemia. Glucokinase (GK) is a hexokinase isozyme, related homologously to at least three other hexokinases. All of the hexokinases can mediate phosphorylation of glucose to glucose-6-phosphate (G6P), which is the first step of both glycogen synthesis and glycolysis. However, glucokinase is coded by a separate gene and its distinctive kinetic properties allow it to serve a different set of functions. Glucokinase has a lower affinity for glucose than the other hexokinases do, and its activity is localized to a few cell types, leaving the other three hexokinases as more important preparers of glucose for glycolysis and glycogen synthesis for most tissues and organs.
Thus tr is roughly proportional to F. The separation of particle bands X and Y, represented by the finite increment ∆tr in their retention times, is achieved only if the force increment ∆F between them is sufficient. A differential in force of only 10−16 N is required for this to be the case. The magnitude of F and ∆F depend on particle properties, field strength and the type of field. This allows for variations and adaptations of the technique. From this basic principle many forms of FFF have evolved varying by the nature of the separative force applied and the range in molecule size to which they are targeted.
Brother Zachariah — formerly known as James "Jem" Carstairs, a Silent Brother, and the former parabatai of Will Herondale, who acts as a kind of uncle to James, Lucie and the others. He is also a first cousin to Cordelia and Alastair. Barbara Lightwood — The eldest child of Gideon Lightwood and Sophie Collins. Growing up, Barbara had the perfect Sight, the ability to see past glamours. She has an understanding with Oliver Hayward, whose family runs the York Institute. Barbara was very affectionate and protective over Thomas—to the point where he found it smothering—and was often considered more gentle than her sister. She was somewhat of a romantic, and wanted to become a dutiful wife rather than a strong Shadowhunter. During a demon attack in Regents Park, Barbara was bitten and collapsed. In her final moments, she was delirious and lashed out, clawing at Oliver who had been crying by her bedside. This unknowingly spread the infection to Oliver who fell ill and died shortly after. Thomas and the others dedicated themselves to not only making a cure but finding and putting an end to the demon attacks in her name. Eugenia Lightwood — The second child of Gideon Lightwood and Sophie Collins. Like Barbara, Eugenia was very affectionate and protective over Thomas, to the point where he found it smothering, and wants to become a dutiful wife rather than a strong Shadowhunter. She is considered stubborn and rebellious. Eugenia was seemingly dubbed "ruined" as she had apparently been found alone with a gentleman whom did not later propose to her.
== Geography == It consisted of two detached parts of the Mecklenburg region: the larger Lordship of Stargard with the residence of Neustrelitz to the southeast of the Grand Duchy of Mecklenburg-Schwerin and the Principality of Ratzeburg on the west. The first was bounded by the Prussian provinces of Pomerania and Brandenburg, the second bordered on the Duchy of Lauenburg (incorporated into the Province of Schleswig-Holstein in 1876) and the territory of the Free City of Lübeck. Major towns beside Neustrelitz included Neubrandenburg, Friedland, Woldegk, Stargard, Fürstenberg, and Wesenberg. The grand duchy also comprised the former commandries of the Knights Hospitaller in Mirow and Nemerow.
Sources: en.wikipedia.org
The Codon Adaptation Index (CAI) is the most widespread technique for analyzing codon usage bias. As opposed to other measures of codon usage bias, such as the 'effective number of codons' (ENc), which measure deviation from a uniform bias (null hypothesis), CAI measures the deviation of a given protein coding gene sequence with respect to a reference set of genes. CAI is used as a quantitative method of predicting the level of expression of a gene based on its codon sequence.
== Early life and education == Culp was born on August 16, 1930, in either Oakland, California, or Berkeley, California. He was the only child of Crozier Cordell Culp, an attorney, and his wife, Bethel Martin Culp (née Collins). He graduated from Berkeley High School, where he was a pole vaulter and took second place at the 1947 CIF California State Meet. Culp attended the University of the Pacific in Stockton, California, and later Washington University in St. Louis, San Francisco State, and the University of Washington School of Drama, but never completed an academic degree. He also received acting training at HB Studio in New York City.
For example, in 1890, Serbia introduced a royal government directive which ordered patients to be treated at the Pasteur Institute in Budapest. Despite the increased availability of vaccines, in practice they were often restricted to the wealthy upper classes, since access commonly required complicated procedures, such as traveling long distances to access treatment and arranging for an extended stay to receive the treatment which involved several weeks of injections, which many people could not afford. The Pasteur-Roux vaccine attenuated the harvested virus samples by allowing them to dry for five to ten days. Similar nerve tissue-derived vaccines are still used in some countries, and while they are much cheaper than modern cell culture vaccines, they are not as effective. Neural tissue vaccines also carry a certain risk of neurological complications. Since the 1980s, countries have increasingly abandoned the use of nerve tissue-derived vaccines, replacing them with modern vaccines. The use of nerve tissue-derived vaccines was phased out in China in 1990, Thailand in 1992, Sri Lanka in 1995, Indonesia in 1996, Philippines in 1997, Laos in 2005, Cambodia in 2005, India in 2005, Nepal in 2006, Vietnam in 2007 and Bangladesh in 2011.
A pharmacy (also known as a chemist in Australia, New Zealand and the British Isles; or drugstore in North America; retail pharmacy in industry terminology; or apothecary, historically) is where most pharmacists practice the profession of pharmacy. It is the community pharmacy in which the dichotomy of the profession exists; health professionals who are also retailers. Community pharmacies usually consist of a retail storefront with a dispensary, where medications are stored and dispensed. According to Sharif Kaf al-Ghazal, the opening of the first drugstores are recorded by Muslim pharmacists in Baghdad in 754 AD.
This abnormal chromosome was dubbed the Philadelphia chromosome - as both scientists were doing their research in Philadelphia, Pennsylvania. Thirteen years later, with the development of more advanced techniques, the abnormal chromosome was shown by Janet Rowley to be the result of a translocation of chromosomes 9 and 22. Identification of the Philadelphia chromosome by cytogenetics is diagnostic for CML. More than 780 leukemias and hundreds of solid tumors (lung, prostate, kidney, etc.) are now characterized by an acquired chromosomal abnormality, whose prognostic value is crucial. The identification of these chromosomal abnormalities has led to the discovery of a very large number of "cancer genes" (or oncogenes). The increasing knowledge of these cancer genes now allows the development of targeted therapies, which transforms the prospects of patient survival. Thus, cytogenetics has had and continues to have an essential role in the progress of cancer understanding. Large databases (Atlas of Genetics and Cytogenetics in Oncology and Haematology, COSMIC cancer database, Mitelman Database of Chromosome Aberrations and Gene Fusions in Cancer) allow researchers and clinicians to have the necessary corpus for their work in this field.
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 research compound that activates the REV-ERBα and REV-ERBβ nuclear receptors. It is not an approved drug and has no established human therapeutic use. Most published biological data come from cell and rodent studies.