LC-MS/MS raises a handful of sensible questions. This page answers them in order, starting with the fundamentals and moving to applications.
Reviewed 2026-01-31. Anything still debated is marked as such rather than presented as settled.
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.
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.
| Property | Value | Notes |
|---|---|---|
| Chemical class | Synthetic REV-ERB agonist | Small-molecule ligand; not a hormone or peptide |
| Molecular formula | C20H24ClN3O4S | Reported for the free base |
| CAS Registry Number | 1379686-30-2 | Unique chemical identifier |
| Common synonyms | SR9009; stenabolic | Stenabolic is informal and not an official name |
| Reported targets | REV-ERBα and REV-ERBβ | Nuclear receptors linked to circadian and metabolic regulation |
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.
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.
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 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.
The Komodo dragon (Varanus komodoensis), also known as the Komodo monitor, is a large reptile of the monitor lizard family Varanidae that is endemic to the Indonesian islands of Komodo, Rinca, Flores, Gili Dasami, and Gili Motang. The largest extant population lives within the Komodo National Park in Eastern Indonesia. It is the largest extant species of lizard, with the males growing to a maximum length of 3 m (10 ft) and weighing up to 150 kg (330 lb). As a result of their size, which is exceptional among reptiles, Komodo dragons are apex predators, dominating the ecosystems in which they live. Komodo dragons hunt and ambush prey; juveniles take small prey like invertebrates or birds, and adults favour larger mammals, occasionally even attacking humans. The diet of adult Komodo dragons mainly consists of Javan rusa and feral pigs, though they also eat considerable amounts of carrion. Young Komodo dragons are vulnerable and dwell in trees to avoid predators, including cannibalistic adults, which young Komodo dragons also try to repel by rolling in feces. They take 8 to 11 years to mature and are estimated to live up to 30 years (or by some estimates as much as 62 years). Mating begins between May and August, and the eggs are laid in September; as many as 20 eggs are deposited at a time in an abandoned megapode nest or in a self-dug nesting hole. The eggs are incubated for seven to eight months, hatching in April, when insects are most plentiful. Western scientists first recorded Komodo dragons in 1910.
In Brazil, regulations on traditional markets are handled at the municipal level. The regulations widely vary across Brazil, with zoning rules prohibiting such markets in some municipalities. A 2003 study found that traditional markets were losing ground in food retail to supermarkets, which had an overall food retail market share of 75%. The gains of supermarkets over traditional food retailers in Brazil were predominantly in meat and seafood retail, with the supermarkets' fresh meat & seafood market shares typically three times greater than their fresh fruits & vegetables market share.
With his assistant Daniel Picard, Adrià has made almonds into cheese and asparagus into bread with the help of natural ingredients. In autumn 2010, Adrià and José Andrés taught a culinary physics course, "Science and Cooking" at Harvard University. In October 2010, Adrià announced an alliance with Telefónica. In March 2012 he announced a new project, LaBullipedia. In a later interview he described the project as "A Western haute cuisine Wikipedia at the service of information but also creativity". As of 2025, this project has not materialized. An art exhibition about Adrià and his restaurant, 'elBulli: Ferran Adrià and The Art of Food', was hosted at Somerset House in London in 2013. The exhibition will be included in a new permanent museum Adrià was set to open at the El Bulli Foundation in 2021. The El Bulli museum opened in 2023 under the name elBulli1846. He received the 1995 Lucky Strike Designer Award.
=== Diabetes stigma === Diabetes stigma describes the negative attitudes, judgment, discrimination, or prejudice against people with diabetes. Often, the stigma stems from the idea that diabetes (particularly Type 2 diabetes) resulted from poor lifestyle and unhealthy food choices rather than other causal factors such as genetics and social determinants of health. Manifestation of stigma can be seen throughout different cultures and contexts. Scenarios include diabetes statuses affecting marriage proposals, workplace-employment, and social standing in communities. Stigma is also seen internally, as people with diabetes can also have negative beliefs about themselves. Often these cases of self-stigma are associated with higher diabetes-specific distress, lower self-efficacy, higher rates of depression, and poorer provider-patient interactions during diabetes care.
Sources: en.wikipedia.org
=== Starvation === Starvation is a rare cause of ketoacidosis, usually instead causing physiologic ketosis without ketoacidosis. Ketoacidosis from starvation most commonly occurs in the setting of an additional metabolic stressor such as pregnancy, lactation, or acute illness.
Einstein died on April 18, 1955, months prior to the institution's dedication and opening. Although affiliation with Mount Sinai Hospital in Manhattan was considered, a site in the Bronx's Morris Park was selected due to ample land and proximity to the adjacent Bronx Municipal Hospital then under construction. Construction of the first medical school building—now the Leo Forchheimer Medical Sciences Building—began in October 1953, with a contemporary design of steel and concrete. On September 12, 1955, Einstein welcomed its first class of 56 students in the partially completed Forchheimer Building. Einstein was the first new medical school to open in New York City since 1897 and the first in the United States to open under Jewish auspices.
=== Pharmacokinetics === Absorption Dapoxetine is a white, powdery, water-insoluble substance. Taken one to three hours before sexual activity, it is rapidly absorbed in the body. Its maximum plasma concentration (Cmax) is reached one to two hours after oral administration. The Cmax and AUC (area under the plasma vs. time curve) is dose dependent. The Cmax and Tm (time needed to obtain the maximum plasma concentration) after single doses of dapoxetine 30 mg and 60 mg are 297 and 498 ng/ml at 1.01 and 1.27 hours, respectively. A high-fat meal does reduce the Cmax slightly, but it is insignificant. In fact, food does not alter dapoxetine pharmacokinetics. It can be taken with or without food.
Sources: en.wikipedia.org
== Cause == DKA most frequently occurs in those who know that they have diabetes, but it may also be the first presentation in someone who has not previously been known to be diabetic. There is often a particular underlying problem that has led to the DKA episode; this may be intercurrent illness (pneumonia, influenza, gastroenteritis, a urinary tract infection), pregnancy, inadequate insulin administration (e.g. defective insulin pen device), myocardial infarction (heart attack), stroke or the use of cocaine. Young people with recurrent episodes of DKA may have an underlying eating disorder, or may be using insufficient insulin for fear that it will cause weight gain. Diabetic ketoacidosis may occur in those previously known to have diabetes mellitus type 2 or in those who on further investigations turn out to have features of type 2 diabetes (e.g. obesity, strong family history); this is more common in African, African-American and Hispanic people. Their condition is then labeled "ketosis-prone type 2 diabetes". Drugs in the gliflozin class (SGLT2 inhibitors), which are generally used for type 2 diabetes, have been associated with cases of diabetic ketoacidosis where the blood sugars may not be significantly elevated ("euglycemic DKA"). While this is a relatively uncommon adverse event, it is thought to be more common if someone receiving an SGLT2 inhibitor who is also receiving insulin has reduced or missed insulin doses.
== Bibliography == Griffiths, John (2011). Tea: A History of the Drink that Changed the World. London: Carlton Publishing. pp. 16,18,63, 78–79, 106. Hale, Sarah Josepha Buell (1841). Early American Cookery. Boston: The Good Housekeeper. p. 112. Heiss, M.L and Heiss, R.J. (2007). The Story of Tea: A cultural history and drinking guide. Berkeley, CA: 10 Speed Press. p. 80. Mair, Victor and Hoh, Erling (2009). The true history of tea. New York: Thames and Hudson. p. 201. Stern, Tracy (2007). Tea Party: 20 Themed Tea parties with recipes for every occasion, from fabulous showers to intimate gatherings. New York: Random House. pp. 12–18.
==== Financial inclusion ==== Digital agriculture technologies can expand farmers' access to credit, insurance, and bank accounts for a number of reasons. First, digital technology helps alleviate the information asymmetry that exists between farmers and financial institutions. When lenders decide a farmer's credit ceiling or insurance premium, they are usually uncertain about what risks the farmer presents. Digital technology reduces the costs of verifying farmers' expected riskiness. The Kenyan company M-Shwari uses customers' phone and mobile money records to assess creditworthiness. Organizations like FarmDrive and Apollo Agriculture incorporate satellite imagery, weather forecasts, and remote sensor data when calculating farmers' loan eligibility. Drone imagery can confirm a farmer's physical assets or land use and Asset tracking using RFID technology allows stakeholders to monitor livestock, making it easier for insurers to understand farmers' riskiness. In all instances, low-cost digital verification reduces lenders' uncertainty: the questions "will this farmer repay the loan?" and "what risks does this farmer face?" become clearer. Second, digital technology facilitates trust between farmers and financial institutions. A range of tools create trust, including real-time digital communication platforms and blockchain/distributed ledger technology/smart contracts. In Senegal, a digitalized, supply-chain-tracking system allows farmers to collateralize their rice to obtain the credit necessary for planting.
Sources: en.wikipedia.org
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.
No. It has no approved medical indication, and human safety and efficacy data are limited. It appears in research chemical markets and is banned by some sports authorities.
Natural ligands include heme and certain metabolites; SR9009 is a synthetic small molecule with higher potency and selectivity in some assays. Its effects depend on cell type and timing. It is not a naturally occurring compound.
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.