HPLC-UV is one of those subjects where the details matter more than the headlines. This page pulls together the background, the mechanisms, and the practical points readers ask about most.
Updated 2026-03-24. Numbers and descriptions here follow the published literature rather than marketing material.
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.
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 |
|---|---|---|
| Appearance | White to off-white solid | Visual inspection is not sufficient for identity. |
| Solubility | Soluble in DMSO and ethanol | Low solubility in water. |
| Typical storage | -20 °C, desiccated, dark | Protect from repeated temperature changes. |
| Common analytical method | LC-MS or HPLC-UV | Reference standard required for comparison. |
| Common synonyms | SR9009; Stenabolic; REV-ERB agonist | Vendor naming may vary. |
Preclinical reports describe effects on exercise endurance, mitochondrial content, and lipid profiles in rodents, but these findings come from specific experimental conditions. Many studies use high doses or delivery methods that may not translate directly to human use. SR9009 has been reported to have low oral bioavailability and a short half-life, which complicates interpretation of oral dosing studies. It is not established as safe or effective for any indication. Literature discussions often separate its pharmacological mechanism from unverified claims made in fitness and supplement markets.
SR9009 is a synthetic small molecule studied as an agonist of the nuclear receptors REV-ERBα and REV-ERBβ. It is not an approved medicine and has no established human therapeutic use. The compound appears in scientific literature as a tool for probing circadian and metabolic regulation. Online sellers often label it as a research chemical, sometimes using the nickname Stenabolic. Its chemical identity is distinct from selective androgen receptor modulators, stimulants, and peroxisome proliferator-activated receptor delta agonists. Researchers use it mainly in cell and animal experiments.
At the molecular level, SR9009 binds REV-ERBα and REV-ERBβ and alters their repressive activity on target genes. These nuclear receptors help regulate the circadian clock, lipid synthesis, glucose metabolism, and inflammatory pathways. By changing transcription, the compound can shift the timing or magnitude of downstream metabolic processes in model systems. It does not act through androgen receptors or adenosine receptors, which distinguishes it from several substances sold for athletic performance. Whether the same transcriptional changes occur in humans at tolerable exposures remains an open question because controlled human studies are lacking.
Regulatory agencies have not approved SR9009 for human therapeutic use. It is typically sold as a research chemical with labels stating that it is not for human consumption. The World Anti-Doping Agency prohibits the substance in sport, generally under the category of non-approved substances. Customs and national laws may restrict importation, sale, or possession. Product quality and legal status can vary by country and vendor, and therapeutic claims are not permitted in regulated advertising because the compound lacks approval.
Several misconceptions surround SR9009. It is often described as a SARM, a steroid, or an exercise pill, but its known target is the REV-ERB receptor family. Rodent studies have examined exercise capacity and metabolic markers, yet human outcomes remain unproven. Oral bioavailability appears low in animals, and human pharmacokinetics are not well characterized. Online products may contain impurities or different compounds, so identity and purity testing are important for research use.
SR9009 is often grouped with compounds studied for circadian and metabolic regulation rather than with classical anabolic steroids. Its interactions with nuclear receptors differ from those of androgen receptor ligands, and its proposed mechanisms involve transcriptional control rather than direct hormone signaling. Some sources classify it as a metabolic modulator because of observed effects on energy utilization. The distinction matters for regulation and for interpreting research results across different compound classes.
SR9009 is a synthetic small molecule developed as a REV-ERB agonist. It binds to REV-ERBα and REV-ERBβ, nuclear receptors that help regulate circadian rhythms and metabolic gene expression. In cell and animal studies, the compound alters lipid and glucose handling and influences skeletal muscle oxidative capacity. Its exact effects in humans remain largely uncharacterized because controlled clinical trials have not been reported. The molecule is frequently described in preclinical literature as a metabolic modulator.
Edward Frank Gale. For political service. Richard Gallagher. For services to the community in Aberdeen. Lucy Gannon, Writer. For services to Television Drama. Richard Ian Gardner. For services to the Police. Arthur Buchan Geddes, Sector Officer, the Coastguard Agency, Department of Transport. Arthur Samuel George, School Crossing Patrol, Portsmouth, Hampshire. For services to Road Safety. James Alexander George, Administrative Officer, Ministry of Defence. Graham James Gibb, Leader, Grampian Police and Braemar Mountain Rescue Teams. For services to Mountain Rescue. Alison Gray Gibson, Temporary Project Manager, Royal Mail, Edinburgh. For services to the Post Office. Sydney Gibson, Secretary, Fergusons Lane Tenants Association. For services to the community in Scotswood, Newcastle-upon-Tyne. Valerie Gibson. For services to the Right to Peace and Quiet Campaign. Joan Giddings, lately Office Administrator, British Apparel and Textile Confederation. For services to the Clothing Industry. Elizabeth Glasgow. For services to the community in Wester Hailes, Edinburgh. John Glover. For services to Golf. Maureen Audrey Gobbett, Higher Executive Officer, Ministry of Defence. Major Douglas George Goddard. For services to the community in Wargrave-on-Thames, Berkshire. David William Goodall. For services to Nature Conservation in Hampshire. Ian Kenmure Evans-Gordon. For political service. Stephen Goulding, Pay Band 8, the Employment Service, Department for Education and Employment. Anne Greaves. For services to the Health and Safety Commission's Occupational Health Advisory Committee.
== In popular culture == King Naram-Sin is a character in the 2021 video game House of Ashes, with the main plot occurring in his personal temple. In the game, he is the self-proclaimed "God King" of Akkad, and is engaged in a war with the Gutians after being cursed by the god Enlil; whom he angered after the sacking of his temple. Naram-Sin was voiced and motion captured by Sami Karim. In the 2021 mobile gacha game Blue Archive, Volume F, the innermost chamber of the large floating quantum supercomputer known as the "Ark of Atra-Hasis" (itself a reference to the Akkadian myth) is named "Throne of Naram-Sin".
=== History === The Local Government Act 1888 reformed English local government by creating administrative counties, county boroughs, and elected county councils and county borough councils to govern them. County boroughs largely consisted of those settlements with a population over 50,000, and administrative counties covered smaller towns and rural areas. The three ridings of Yorkshire were reconstituted as the administrative counties of County of York, East Riding, County of York, North Riding, and County of York, West Riding. Within what would later become West Yorkshire, Bradford, Halifax, Huddersfield, and Leeds were made county boroughs. The Local Government Act 1972, which came into effect in 1974, reformed English local government again. It introduced metropolitan counties, which covered the largest urban areas, and non-metropolitan counties elsewhere. The metropolitan county of West Yorkshire was created from the central part of the West Riding and divided into five metropolitan boroughs. The provision of local government services was divided between West Yorkshire County Council and the district councils of the five boroughs. In Local Government Act 1985, which came into effect the following year, abolished the county council and transferred many of its powers and responsibilities the borough councils. It also created or allowed to be created joint bodies, notably the West Yorkshire Passenger Transport Executive, in which all the borough councils participated.
=== Maternal === Fetal AFP levels can be monitored in the urine of pregnant women. Since AFP is quickly cleared from the mother's serum via her kidneys, maternal urine AFP correlates with fetal serum levels, although the maternal urine level is much lower than the fetal serum level. AFP levels rise until about week 32. Maternal serum alpha-fetoprotein (MSAFP) screening is performed at 16 to 18 weeks of gestation. If MSAFP levels indicate an anomaly, amniocentesis may be offered to the patient.
Sources: en.wikipedia.org
By 2015, even at 90 years old, Mahathir remained sharp and combative. He repeatedly called for prime minister Najib Razak to resign over the 1Malaysia Development Berhad scandal (1MDB). On 30 August 2015, he and Siti Hasmah attended the Bersih 4 rally, a mass protest organised in response to the scandal. In 2016, Mahathir chaired the Malaysian Citizens' Declaration, which brought together several political figures and non-governmental organisations in calling for Najib's resignation. In this declaration, Mahathir listed 37 points. Later, the Citizens' Declaration reached one million signatures in May of the same year. In the 2016 Sungai Besar by-election, he supported Amanah and other Pakatan Harapan leaders, lending his influence to the opposition coalition. Mahathir left UMNO in 2016, and formed Parti Pribumi Bersatu Malaysia (BERSATU). The new party was officially registered on 9 September 2016, and Mahathir became its chairman. By 2017, he had officially joined the opposition coalition Pakatan Harapan. Negotiations then took place between different factions of the coalition for Mahathir to become the chairman and prime ministerial candidate. He assumed the position of chairman on 14 July 2017, despite reservations from supporters of Anwar Ibrahim, who could not contest in polls himself while imprisoned. In 2016, Mahathir had his police outriders withdrawn after his privileges were revoked due to his participation in anti-government events.
Benzo[a]pyrene (BaP or B[a]P) is a polycyclic aromatic hydrocarbon (PAH) and the result of incomplete combustion of organic matter at temperatures between 300 and 600 °C (572 and 1,112 °F). The ubiquitous compound can be found in coal tar, tobacco smoke and many foods, especially grilled meats. The substance with the formula C20H12 is one of the benzopyrenes, formed by a benzene ring fused to pyrene. Its diol epoxide metabolites, more commonly known as BPDE, react with and bind to DNA, resulting in mutations and eventually cancer. It is listed as a Group 1 carcinogen by the IARC. In the 18th century a scrotal cancer of chimney sweepers, the chimney sweeps' carcinoma, was already known to be connected to soot.
==== Tubular aggregate myopathy ==== Although tubular aggregates are seen in a variety of myopathies, both genetic and environmental, the congenital myopathies associated with genes STIM1 and ORAI1 are known as tubular aggregate myopathy (TAM) types 1 and 2.
==== 2700–2799 ==== Social Security (Introduction of Disability Living Allowance) (Amendment) (No. 3) Regulations 1993 (S.I. 1993/2704) Capital Allowances (Corresponding Northern Ireland Grants) Order 1993 (S.I. 1993/2705) Building Societies (Designation of Qualifying Bodies) (No. 3) Order 1993 (S.I. 1993/2706) Education (No. 2) Act 1986 (Amendment) Order 1993 (S.I. 1993/2709) Housing Renovation etc. Grants (Grant Limit) (Amendment) Order 1993 (S.I. 1993/2711) Reconstitution of the River Ouzel Internal Drainage Board Order 1993 (S.I. 1993/2712) Placing on the Market and Supervision of Transfers of Explosives Regulations 1993 (S.I. 1993/2714) Food Labelling (Scotland) Amendment Regulations 1993 (S.I. 1993/2731) Teachers (Education, Training and Recommendation for Registration) (Scotland) Regulations 1993 (S.I. 1993/2732) Portsmouth Mile End Quay (Berth No. 2 Extension) Harbour Revision Order 1993 (S.I. 1993/2733) Criminal Justice Act 1993 (Commencement No. 3) Order 1993 (S.I. 1993/2734) Social Security (Contributions) (Miscellaneous Amendments) Regulations 1993 (S.I. 1993/2736) Public Service Vehicles (Registration of Local Services) (Amendment) Regulations 1993 (S.I. 1993/2752) Public Service Vehicles (Operators' Licences) (Amendment) Regulations 1993 (S.I. 1993/2753) Public Service Vehicles (Traffic Commissioners: Publication and Inquiries) (Amendment) Regulations 1993 (S.I. 1993/2754) Copyright (Certification of Licensing Scheme for Educational Recording of Broadcasts) (Open University Educational Enterprises Limited) Order 1993 (S.I.
Hydrothermal vents, in some instances, have led to the formation of exploitable mineral resources via the deposition of seafloor massive sulfide deposits. The Mount Isa orebody, located in Queensland, Australia, is an excellent example. Many hydrothermal vents are rich in cobalt, gold, copper, and rare earth metals essential for electronic components. Hydrothermal venting on the Archean seafloor is considered to have formed Algoma-type banded iron formations, which have been a source of iron ore. Recently, mineral exploration companies, driven by the elevated price activity in the base metals sector during the mid-2000s, have turned their attention to the extraction of mineral resources from hydrothermal fields on the seafloor. Significant cost reductions are, in theory, possible. In countries such as Japan, where mineral resources are primarily derived from international imports, there is a particular push for the extraction of seafloor mineral resources. The world's first "large-scale" mining of hydrothermal vent mineral deposits was carried out by Japan Oil, Gas and Metals National Corporation (JOGMEC) in August – September, 2017. JOGMEC carried out this operation using the Research Vessel Hakurei. This mining was carried out at the 'Izena hole/cauldron' vent field within the hydrothermally active back-arc basin known as the Okinawa Trough, which contains 15 confirmed vent fields according to the InterRidge Vents Database. Two companies are currently engaged in the late stages of commencing to mine seafloor massive sulfides (SMS).
Sources: en.wikipedia.org
== Prevalence == The prevalence of HLA-B27 varies markedly in the global population. In the United States, the estimated prevalence is 6-8%. 4% of North Africans, 2–9% of Chinese, and 0.1–0.5% of persons of Japanese descent possess the gene that codes for this antigen. Among the Sami in Northern Scandinavia (Sápmi), 24% of people are HLA-B27 positive, while 1.8% have associated ankylosing spondylitis, compared to 14-16% of Northern Scandinavians in general. In Finland, an estimated 14% of the population is positive for HLA-B27, while more than 95% of patients with ankylosing spondylitis and approximately 70–80% of patients with reactive arthritis have the genetic marker.
Because breasts are mostly fatty tissue, their shape can—within limits—be molded by clothing, such as foundation garments. Bras are commonly worn by about 90% of Western women, and are often worn for support. The social norm in most Western cultures is to cover breasts in public, though the extent of coverage varies depending on the social context. Some religions ascribe a special status to the female breast, either in formal teachings or through symbolism. Islam forbids free women from exposing their breasts in public. Many cultures, including Western cultures in North America, associate breasts with sexuality and tend to regard bare breasts as immodest or indecent. In some cultures, like the Himba in northern Namibia, bare-breasted women are normal. In some African cultures, for example, the thigh is regarded as highly sexualized and never exposed in public, but breast exposure is not taboo. In a few Western countries and regions female toplessness at a beach is acceptable, although it may not be acceptable in the town center. Social attitudes and laws regarding breastfeeding in public vary widely. In many countries, breastfeeding in public is common, legally protected, and generally not regarded as an issue. However, even though the practice may be legal or socially accepted, some mothers may nevertheless be reluctant to expose a breast in public to breastfeed due to actual or potential objections by other people, negative comments, or harassment. It is estimated that around 63% of mothers across the world have publicly breast-fed.
== Effects on health == Obesity increases a person's risk of developing various metabolic diseases, cardiovascular disease, osteoarthritis, Alzheimer's disease, depression, and certain types of cancer. Depending on the degree of obesity and the presence of comorbid disorders, obesity is associated with an estimated 2–20 year shorter life expectancy. High BMI is a marker of risk for, but not a direct cause of, diseases caused by diet and physical activity.
==== C4 ==== C4 plants capture carbon dioxide in their mesophyll cells (using an enzyme called phosphoenolpyruvate carboxylase which catalyzes the combination of carbon dioxide with a compound called phosphoenolpyruvate (PEP)), forming oxaloacetate. This oxaloacetate is then converted to malate and is transported into the bundle sheath cells (site of carbon dioxide fixation by RuBisCO) where oxygen concentration is low to avoid photorespiration. Here, carbon dioxide is removed from the malate and combined with RuBP by RuBisCO in the usual way, and the Calvin cycle proceeds as normal. The CO2 concentrations in the Bundle Sheath are approximately 10–20 fold higher than the concentration in the mesophyll cells. This ability to avoid photorespiration makes these plants more hardy than other plants in dry and hot environments, wherein stomata are closed and internal carbon dioxide levels are low. Under these conditions, photorespiration does occur in C4 plants, but at a much lower level compared with C3 plants in the same conditions. C4 plants include sugar cane, corn (maize), and sorghum.
Sources: en.wikipedia.org
Liquid chromatography–mass spectrometry is common for identity and purity checks. High-performance liquid chromatography with ultraviolet detection can also be used. Both methods require a suitable reference standard.
The solid is usually kept desiccated at -20 °C or lower and protected from light. Stock solutions are aliquoted to limit freeze–thaw cycles. Aqueous solutions are not generally recommended for long-term storage.
Laws differ by country and by intended use. It is not an approved medicine, and many vendors sell it as a research chemical. Purchasers are responsible for confirming local restrictions.
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.