research chemical 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.
Last reviewed on 2026-06-05. Where a claim depends on a specific study, the study is described rather than over-claimed.
SR9009 is a synthetic small molecule developed as an agonist of the nuclear receptors REV-ERBα (NR1D1) and REV-ERBβ (NR1D2). These receptors help regulate circadian rhythms and metabolic gene expression. In cell and animal studies, SR9009 alters transcription of genes involved in lipid metabolism, inflammation, and mitochondrial function. It is not an approved medicine, and its pharmacological profile in humans remains largely uncharacterized. The compound is frequently discussed in the context of circadian biology and metabolic research rather than clinical use.
Preclinical reports have linked SR9009 to improved endurance and altered energy expenditure in rodents. Such findings have prompted interest in whether REV-ERB activation can influence skeletal muscle metabolism. However, the reported effects depend on dose, route, and experimental model, and replication across laboratories is limited. Human trials have not established comparable outcomes, so claims about exercise performance remain speculative. The absence of controlled human data is a central limitation in interpreting these observations.
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.
| Property | Value | Notes |
|---|---|---|
| Chemical class | Synthetic REV-ERB agonist | Small molecule; not a steroid or peptide. |
| Primary targets | NR1D1 and NR1D2 | Also known as REV-ERBα and REV-ERBβ. |
| Studied routes | Intraperitoneal in rodents | Oral bioavailability in humans is not established. |
| Human approval | No approved therapeutic indication | No recognized clinical use. |
| Key uncertainty | Human physiological effects | Preclinical findings may not translate. |
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.
Scientific discussion of SR9009 often separates animal evidence from human anecdote. Rodent studies provide controlled data on endurance, metabolism, and gene expression, but they use specific strains, doses, and treatment durations. Human reports are mostly uncontrolled and cannot establish cause and effect. Open questions include oral bioavailability, tissue distribution, metabolic stability, and long-term effects. Review articles generally call for more rigorous pharmacokinetic and safety research before any clinical use could be considered.
Analytical methods for SR9009 typically rely on liquid chromatography coupled with tandem mass spectrometry. The technique can separate the parent compound from related substances and detect low concentrations in biological matrices. Urine and blood are common samples in anti-doping testing, while in vitro studies may use cell culture media. Rapid metabolism and low expected concentrations make method validation important for reliable identification. Exact metabolite patterns can vary by species and are not fully mapped.
Regulatory treatment of SR9009 reflects its investigational status. The compound has no approved human therapeutic indication, and sports authorities prohibit its use. It appears on anti-doping lists as a non-approved substance or metabolic modulator, depending on the list version. Products sold online as research chemicals are not quality-controlled medicines, so their identity and purity can differ from the label. Such products may also contain unlisted compounds, which complicates both testing and safety assessment.
In 1929, Adolf Butenandt and Edward Adelbert Doisy independently isolated and purified estrone, the first estrogen to be discovered. Then, estriol and estradiol were discovered in 1930 and 1933, respectively. Shortly following their discovery, estrogens, both natural and synthetic, were introduced for medical use. Examples include estriol glucuronide (Emmenin, Progynon), estradiol benzoate, conjugated estrogens (Premarin), diethylstilbestrol, and ethinylestradiol. The word estrogen derives from Ancient Greek. It is derived from "oestros" (a periodic state of sexual activity in female mammals), and genos (generating). It was first published in the early 1920s and referenced as "oestrin". With the years, American English adapted the spelling of estrogen to fit with its phonetic pronunciation.
In either case, a mixture of unbound ligands, proteins, ligand-protein complexes is passed through a column of porous beads. Ligand-protein complexes are excluded from entering the beads and exit the column quickly, while unbound ligands must travel through the beads and are retained by the column for a longer time. Ligands that elute from the column early on are therefore inferred to be bound to a protein. The automated ligand identification system (ALIS), developed by Schering-Plough, uses a combined HPLC-based SEC to liquid chromatography-mass spectrometry (LC-MS) system that separates ligand-protein complexes from unbound ligands using SEC and diverts the complex toward an LC-MS system for on-line analysis of bound ligands. Novartis' SpeedScreen uses SEC in 96-well spin column format, also known as gel filtration chromatography, which allows for simultaneous removal of unbound ligands from up to 96 samples. Samples are also passed through porous beads, but centrifugation is used to move the sample through the column. SpeedScreen is not coupled to an LC-MS system and requires further processing prior to final analysis. In this case, ligands must be freed from their targets and analyzed separately.
== Family == In 1890, Thomson married Rose Elisabeth Paget at the church of St Mary the Less. Rose, who was the daughter of Sir George Edward Paget, a physician and then Regius Professor of Physic at Cambridge, was interested in physics. Beginning in 1882, women could attend demonstrations and lectures at the University of Cambridge. Rose attended demonstrations and lectures, among them Thomson's, leading to their relationship. They had two children: George Paget Thomson, who was also awarded a Nobel Prize for his work on the wave properties of the electron; and Joan Paget Thomson (later Charnock), who became an author—writing children's books, non-fiction, and biographies.
Sources: en.wikipedia.org
As a result, to be able to separate mixtures more efficiently, a subsequent LC analysis must employ very different separation selectivity relative to the first column. Another requirement to effectively use 2D liquid chromatography, according to Bushey and Jorgenson, is to employ highly orthogonal techniques which means that the two separation techniques must be as different as possible.
== S == saprobe – sarcoplasmic reticulum – scientific classification – secondary metabolite – secondary structure – second messenger – seed – seed plant – selection – Semiochemical – sequencing – serum – semen – Sewall Wright - sex linkage – sexual reproduction – sexual selection – shigella – shoot – signal transduction – silk – Sir Charles Lyell – sister chromatid – skeleton – skin cell – sleep – smooth ER – sociobiology – speciation – species – Hans Spemann – sperm – spermatid – spermatogenesis – spermiogenesis – spliceosome – splicing – spore – sporophyte – SSRI – starch – stem – stem cell – Stem cell chip – sticky end – stoma – stomach – streptomycin – structural biology – structural gene – substrate – substrate-level phosphorylation – surface area-to-volume ratio – symbiosis – symbiogenesis – synapomorphy – synapse – syngamy – systematics – systems biology
=== Small scale === Transitions between scales are always fluent. There is no sharp cut that defines the end of small- and the beginning of medium/pilot scale. However, chromatography columns with an inner diameter (ID) of up to 5 cm are generally considered small scale or laboratory scale columns. Small scale chromatography columns are mostly intended for design of experiments (DoE); proof of concept; validation (drug manufacture) or research and development experiments. Columns of this scale category are distinguished by their small dimensions in comparison to chromatography columns intended for larger scales as well as relatively high pressure tolerance and selection of materials in contact with the liquid phase. This is especially important for applications in the biopharmaceutical industry which underlie close scrutiny by regulatory agencies (U.S. Food and Drug Administration; European Medicines Agency).
== Types == Mummies are typically divided into one of two distinct categories: anthropogenic or spontaneous. Anthropogenic mummies were deliberately created by the living for any number of reasons, the most common being for religious purposes. Spontaneous mummies, such as Ötzi and the Maronite mummies, were created unintentionally due to natural conditions such as extremely dry heat or cold, or acidic and anaerobic conditions such as those found in bogs. While most individual mummies exclusively belong to one category or the other, there are examples of both types being connected to a single culture, such as those from the ancient Egyptian culture and the Andean cultures of South America. Some of the later well-preserved corpses of the mummification were found under Christian churches, such as the mummified vicar Nicolaus Rungius found under the St. Michael Church in Keminmaa, Finland. There are also cases that fall outside of these categories.
Sources: en.wikipedia.org
=== Addiction === Progesterone enhances the function of serotonin receptors in the brain, so an excess or deficit of progesterone has the potential to result in significant neurochemical issues. This link explains why some people resort to substances that enhance serotonin activity such as nicotine, alcohol, and cannabis when their progesterone levels fall below optimal levels.
==== Antifungals ==== Regular use of an over-the-counter or prescription antifungal shampoo or cream is a common treatment. The topical antifungal medications ketoconazole and ciclopirox have the best evidence. Ketoconazole should be used twice per week. Shampoo or soap containing zinc pyrithione, selenium disulfide, or piroctone olamine is also used. Products containing zinc pyrithione have been banned in the European Union since 2021 due to concerns over environmental toxicity alongside the presence of suitable alternatives. These options are often used daily and may also be used in conjunction with a ketoconazole shampoo regimen on alternate days. It is unclear if other antifungals are equally effective, as this has not been sufficiently studied. Antifungals that have been studied and found to be effective in the treatment of seborrhoeic dermatitis include ketoconazole, fluconazole, miconazole, bifonazole, sertaconazole, clotrimazole, flutrimazole, ciclopirox, terbinafine, butenafine, selenium disulfide, piroctone olamine and lithium salts such as lithium gluconate and lithium succinate. Topical climbazole appears to have little effectiveness in the treatment of seborrhoeic dermatitis. Systemic therapy with oral antifungals including itraconazole, fluconazole, ketoconazole is effective. Adverse side effects have been documented for fluconazole and ketoconazole, with the latter not recommended for use, while itraconazole, with its good safety profile, is the most commonly prescribed.
primary reconstruction: the replacement of breast tissues damaged by trauma (blunt, penetrating, blast), disease (breast cancer), and failed anatomic development (tuberous breast deformity). revision and reconstruction: to revise (correct) the outcome of a previous breast reconstruction surgery. primary augmentation: to aesthetically augment the size, form, and feel of the breasts. The operating room time of post–mastectomy breast reconstruction, and of breast augmentation surgery is determined by the procedure employed, the type of incisions, the breast implant (type and materials), and the pectoral locale of the implant pocket. Recent research has indicated that mammograms should not be done with any greater frequency than that used in normal procedure in patients undergoing breast surgery, including breast implant, augmentation, mastopexy, and breast reduction.
ADP + a phosphoprotein Thus, the two substrates of this enzyme are ATP and a protein, whereas its two products are ADP and phosphoprotein. The systematic name of this enzyme class is ATP:protein phosphotransferase (non-specific).
Robert Derek Channon (born 15 June 1944) is a British engineer known for inventing an insulin pump for diabetics, and miniaturized helicopters for the UK military. A diabetic himself, Channon developed the three ounce insulin pump to replace his own regular insulin injections. The National Medical Research Foundation awarded Channon £26,000 to develop the pump. In 1980, the National Medical Research Foundation awarded Guy's Hospital £40,000 to test Channon's pump in people with diabetes. The trial, under the supervision of Harry Keen, tested whether using the pump reduced the development of blindness in 30 people with diabetes. In July 2024 Channon was awarded an honorary Doctor of Engineering degree, by UWE Bristol, in recognition of his contribution to the management of type 1 diabetes.
Sources: en.wikipedia.org
It is a synthetic compound that acts as an agonist at REV-ERBα and REV-ERBβ. It is used mainly as a research chemical to study circadian and metabolic pathways. It is not approved for human therapeutic use.
REV-ERB receptors generally repress transcription when bound by natural heme. SR9009 is described as an agonist that enhances this repressive activity. The result is altered expression of clock and metabolic genes.
Published controlled human trials are lacking. Some sources cite limited or unofficial reports, but these do not establish safety or efficacy. Claims about human performance effects remain unverified.
Liquid chromatography with mass spectrometry is a common approach. Ultraviolet detection and nuclear magnetic resonance can support identification when suitable standards are available.