This is a working overview of LC-MS, written for readers who want more than a one-paragraph summary but less than a textbook.
This page was last updated on 2026-01-26 and is reviewed periodically as new material appears.
SR9009 is a synthetic small molecule that acts on the nuclear receptors REV-ERBα and REV-ERBβ. These receptors are part of the circadian clock machinery and normally repress transcription of certain target genes. In laboratory research, SR9009 is used as a chemical tool to study how REV-ERB activity influences metabolism, inflammation, and daily biological rhythms. The compound is not an approved medicine, and its effects in humans remain largely uncharacterized. It is often described as an investigational agent rather than a therapeutic product.
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.
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.
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.
| Property | Value | Notes |
|---|---|---|
| Common name | SR9009 | Also marketed informally as Stenabolic |
| Chemical class | Synthetic REV-ERB agonist | Binds REV-ERBα and REV-ERBβ |
| Molecular formula | C24H30ClN3O4S | Approximate molecular weight 492 g/mol |
| CAS Registry Number | 1379686-30-2 | Identifier for the parent compound |
| Regulatory status | Not approved for human use | Prohibited in sport by WADA |
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.
SR9009 is a synthetic small molecule studied as an agonist of the nuclear receptors REV-ERBα and REV-ERBβ. It is not a steroid, peptide, or natural hormone. In scientific literature, it appears under the code SR9009 and in non-scientific contexts as Stenabolic. The compound was identified through chemical screening efforts aimed at targeting circadian clock components. Its status remains investigational, and no regulatory agency has approved it as a human medicine.
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.
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.
Handling recommendations for SR9009 in a laboratory setting include storing the solid at low temperature, protected from light and moisture. The compound is often dissolved in dimethyl sulfoxide or ethanol for experiments. Solutions should be prepared with appropriate personal protective equipment and disposed of according to local rules. Stability data for long-term storage are limited, so stock solutions are typically kept cold and used within defined periods. Records of preparation date and concentration support reproducibility.
SR9009 is not approved as a medicine by major regulatory agencies. It is commonly sold as a research chemical, a category that may fall outside customary drug approval and quality rules. In sports, the World Anti-Doping Agency lists SR9009 as a prohibited substance. Athletes who use it can face sanctions if it is detected in a sample. Legal status varies by country, and importation may be restricted. Enforcement practices differ across borders.
Detection of SR9009 in biological samples usually employs liquid chromatography coupled with tandem mass spectrometry. This method can identify the parent compound and sometimes metabolites in urine or blood. Because exposure can be low and clearance may be rapid, sample timing and limits of detection matter. Laboratories validate assays for sensitivity and specificity. Results are interpreted alongside chain-of-custody and quality-control records. Urine is the common matrix for anti-doping analysis, while blood may be used in research settings.
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.
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.
Chromatography – to measure the quality of product or reactants Density (oil) – for custody metering of liquids Dewpoint (water dewpoint and hydrocarbon dewpoint) to check the efficiency of dehydration or dewpoint control plant Electrical conductivity – to measure the effectiveness of potable water reverse osmosis plant Oil-in-water – prior to discharge of water into the environment pH of reactants and products Sulphur content – to check the efficiency of gas sweetening plant Most instruments function continuously and provide a log of data and trends. Some analyser instruments are configured to alarm (AAH) if a measurement reaches a critical level.
== Physical forces which cause entrapment == Nerve entrapment is caused primarily by two physical forces on soft tissue: compression and tension. Compression will squeeze the nerve and impair its local microcirculatory environment which commonly happens in anatomic tunnels. Tension is a pulling force, often caused by scarring which impedes nerve mobility during limb movements. Both the magnitude and duration of these forces can determine the extent of injury.
==== Cardiovascular ==== Methamphetamine is a sympathomimetic drug that causes vasoconstriction and tachycardia. Methamphetamine also promotes abnormal extra heartbeats and irregular heart rhythms, which may be life-threatening.
The "Venus" figurines have been theorized, not universally, as representing a mother goddess; the abundance of such female imagery has inspired the theory that religion and society in Paleolithic (and later Neolithic) cultures were primarily interested in, and may have been directed by, women. Adherents of the theory include archaeologist Marija Gimbutas and feminist scholar Merlin Stone, the author of the 1976 book When God Was a Woman. Other explanations for the purpose of the figurines have been proposed, such as Catherine McCoid and LeRoy McDermott's hypothesis that they were self-portraits of woman artists and R.Dale Gutrie's hypothesis that served as "Stone Age pornography".
Sources: en.wikipedia.org
After fierce fighting erupted between the Druze and Maronite populations in the Mount Lebanon region in 1860, France and other Western nations then pressured the Ottomans to set up a semiautonomous region known as a Mutasarrifate. After 1861 there existed an autonomous Mount Lebanon with a Christian mutasarrıf, which had been created as a homeland for the Maronites under European diplomatic pressure following the 1860 massacres. Historians link the Maronite ascendancy in the Mutasarrifate to their alliance with the French and their subsequent domination of the silk trade, through the development of a Maronite bourgeoisie class. The Maronite Catholics and the Druze founded modern Lebanon in the early eighteenth century, through the ruling and social system known as the "Maronite-Druze dualism" which developed in Ottoman-era Mount Lebanon Mutasarrifate, creating one of the calmest atmospheres that Lebanon had ever lived in. The working out of this dualism greatly affected the character of independent Lebanon later. Upon the establishment of the Mutasarrifate system, the Christians and Druze groups entered in economic, political, and religious relations with Europeans rather than Ottomans. The ruling and social system in the Mount Lebanon Mutasarrifate was formed from the Maronite-Druze dualism, and the security stability and Druze-Maronite coexistence in the Mutasarrifate allowed the development of the economy and the system of government.
Dakin's solution is a dilute solution of sodium hypochlorite (0.4% to 0.5%) and other stabilizing ingredients, traditionally used as an antiseptic, e.g. to cleanse wounds in order to prevent infection. The preparation was for a time called also Carrel–Dakin solution or Carrel–Dakin fluid.
Later, the dynamins migrate under the outer plastid dividing ring, into direct contact with the chloroplast's outer membrane, to cleave the chloroplast in two daughter chloroplasts. A remnant of the outer plastid dividing ring remains floating between the two daughter chloroplasts, and a remnant of the dynamin ring remains attached to one of the daughter chloroplasts. Of the five or six rings involved in chloroplast division, only the outer plastid-dividing ring is present for the entire constriction and division phase—while the Z-ring forms first, constriction does not begin until the outer plastid-dividing ring forms.
The German Democratic Republic (East Germany) was a Marxist-Leninist communist state that utilised a planned economy based on economic policies set by the ruling Socialist Unity Party of Germany (SED). The vast majority of the economy belonged to state-owned enterprises known as Volkseigene Betriebe (VEBs), which were under the control of the State Planning Commission of the Council of Ministers. The SED allocated investment into certain industries based on its economic policies, rather than based on the supply and demand of the market. While East Germany was able to maintain a modest economic growth and an increase in living standards, it was unable to keep pace with the spending growth of the welfare state needed to maintain those living standards. A growing proportion of investment funds were consumed by the ever-expanding and costly welfare state. The SED attempted to fuel economic growth with foreign loans, but the economy actually headed towards stagnation and led to a severe debt crisis that only starved East German industries even further. By the time of Die Wende and the fall of the SED regime in 1989, East Germany's industries were significantly labour intensive and underdeveloped compared to those in the Federal Republic of Germany (West Germany), which made many of them unprofitable and indebted. The de Maizière cabinet, the first non-socialist government of East Germany, decided on a mass privatisation of these industries.
=== Physical properties === Indigoidine is a blue amorphous powder that is insoluble in water and most other solvents, but dissolves in hydrochloric acid, producing a royal blue color, and in hot sulfuric acid, producing an orange-brown color.
Sources: en.wikipedia.org
Betadine products and medical variants by Avrio Health (part of Purdue Pharma) Ingredients: Povidon-iodine etc. As of June 2021, not recommended by manufacturer to "kill" coronaviruses. Bleach products: Clorox Cyosan Zonrox Bleach Henkel products: biff Hygiene Total Ingredients: Benzalkonium chloride and formic acid Tested against SARS-CoV-2 according to producer statement on website. Bref Power Bakterien & Schimmel Purex Heitmann Hygiene & Care products: Universal Hygiene Laundry Rinse 1.5 Ingredients: Didecyldimethylammonium chloride Hygiene Spray Ingredients: Ethanol, 2-propanol According to manufacturer is effective against coronaviruses, including SARS-CoV-2 Listerine Ingredients: Alcohol, sodium fluoride, essential oils (specifically in case of management of inflammatory periodontal diseases) Unknown or limited virucidal activity Lysol Ingredient: Benzalkonium chloride Some of the products having been tested against SARS-CoV-2. Sterillium Ingredients: 1-Propanol, 2-propanol and mecetronium ethylsulfate By former Bode Chemie, now Hartmann AG, one of Germany's major health-care brands available in 50 countries, and according to website "the world's most scientifically researched hand disinfectant with approximately 60 scientific publications in trade journals in 2015."
A parathyroid adenoma is the most common cause of hyperparathyroidism. They are more commonly found in women than in men. In this form, the chief cells mutate to exhibit multiple nuclei. Chief cells in parathyroid adenomas also display acid phosphatase activity. It is a benign tumor of the gland that requires surgical removal. These benign adenomas are typically affect only one or two of the parathyroid glands, known respectively as a single adenoma or double adenoma. Typically, no disease is linked to the cause. A primary adenoma can only develop as a primary cause.
== In insects == In Drosophila melanogaster, the alpha-subunit of Na+/K+-ATPase has two paralogs, ATPα (ATPα1) and JYalpha (ATPα2), resulting from an ancient duplication in insects. In Drosophila, ATPα1 is ubiquitously and highly expressed, whereas ATPα2 is most highly expressed in male testes and is essential for male fertility. Insects have at least one copy of both genes, and occasionally duplications. Low expression of ATPα2 has also been noted in other insects. Duplications and neofunctionalization of ATPα1 have been observed in insects that are adapted to cardiotonic steroid toxins such as cardenolides and bufadienolides. Insects adapted to cardiotonic steroids typically have a number of amino acid substitutions, most often in the first extra-cellular loop of ATPα1, that confer resistance to cardiotonic steroid inhibition.
These mechanism-based methods use knowledge about the polymerase amplification process to generate estimates of the original sample concentration. An extension of this approach includes an accurate model of the entire PCR reaction profile, which allows for the use of high signal-to-noise data and the ability to validate data quality prior to analysis. According to research of Ruijter et al. MAK2 assumes constant amplification efficiency during the PCR reaction. However, theoretical analysis of polymerase chain reaction, from which MAK2 was derived, has revealed that amplification efficiency is not constant throughout PCR. While MAK2 quantification provides reliable estimates of target DNA concentration in a sample under normal qPCR conditions, MAK2 does not reliably quantify target concentration for qPCR assays with competimeters.
Representative James Talarico legislative website Talarico for Texas U.S. Senate campaign website Financial information (federal office) at the Federal Election Commission Profile at Vote Smart Appearances on C-SPAN
Sources: en.wikipedia.org
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.
No. SR9009 has not been approved as a therapeutic drug in the United States, European Union, or other major markets. Human safety and efficacy data are very limited. Its presence in consumer products does not imply regulatory approval.
The World Anti-Doping Agency lists SR9009 as a prohibited substance because it can alter gene expression and metabolic pathways relevant to performance. The ban applies at all times, not only during competition. Detection relies on laboratory methods such as mass spectrometry.
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.