A practical reference on LC-MS: what it is, how it behaves, what the literature reports, and where the honest uncertainties sit.
Reviewed 2025-08-28. Anything still debated is marked as such rather than presented as settled.
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.
SR9009 binds REV-ERB receptors and alters their repressive activity on target genes. This action can change transcription of genes involved in lipid handling, glucose metabolism, and mitochondrial function. In rodent studies, treated animals have shown changes in muscle oxidative capacity and exercise performance, though effects vary by dose, duration, and model. The precise molecular steps connecting receptor binding to whole-body outcomes are still an active area of investigation. Findings in animals do not automatically translate to humans.
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.
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.
| Property | Value | Notes |
|---|---|---|
| Chemical class | Synthetic REV-ERB agonist | Small-molecule nuclear receptor ligand |
| Appearance | Off-white to pale yellow solid | Typical for research-grade powder |
| Solubility class | Soluble in DMSO; low water solubility | Common stock solutions use organic solvent |
| Typical stock solvent | Dimethyl sulfoxide | Used for laboratory assays |
| Common analytical method | HPLC with UV or mass detection | Used for identity and purity checks |
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 frequently discussed in fitness and research-chemical contexts, yet it has no approved medical indication. Regulatory agencies have not authorized it for human use, and it is not a standard prescription drug. Some sports organizations list it as a prohibited substance because of its potential performance-enhancing properties. Published human data are sparse, so claims about its effects in people often rely on animal models or anecdotal reports. Quality and identity of online materials can vary widely.
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.
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 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.
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.
Cèpe bronzé ("dark cep"; Boletus aereus), much rarer than B. edulis, is more highly regarded by gourmets and consequently more expensive. Usually smaller than B. edulis, it is also distinctively darker in colour. It is especially suited to drying. Cèpe des pins ("pine tree cep"; Boletus pinophilus or Boletus pinicola) grows among pine trees. Rarer than B. edulis, it is less appreciated by gourmets than the two other kinds of porcini, but remains a mushroom rated above most others. Cèpe d'été ("summer cep"; Boletus reticulatus), also less common and found earlier. Molecular phylogenetic analyses have proven these three are all distinctive and separate species; other taxa formerly believed to be unique species or subspecies, such as B. betulicola, B. chippewaensis, B. persoonii, B. quercicola and B. venturii, are now known to be part of a B. edulis species complex with a wide morphological, ecological and geographic range, and that the genetic variability in this complex is low. Similar molecular technology has been developed to rapidly and accurately identify B. edulis and other commercially important fungi. Three divergent lineages found in Yunnan province in China that are commonly marketed and sold as B. edulis (and are actually more closely related to B. aereus) were described in 2013 as B. bainiugan, B. meiweiniuganjun and B. shiyong. The classification has since been updated and expanded. All lineages are still members of Boletus sect. Boletus, the sensu stricto "porcini clade" of the genus.
Quantum wires, which confine electrons or holes in two spatial dimensions and allow free propagation in the third. Quantum wells, which confine electrons or holes in one dimension and allow free propagation in two dimensions.
=== Afonso Dias === In one of the Dias' hearings, it was brought up that the defendant came from a poor family, was 22 and played with an 11 year old child at the time of the disappearance. It was also brought up that the defendant was meeting up with Mendonça in private as Mendonça's parents had forbidden it, after Dias came back changed from the army and as a deserter. Manuel Mendonça said that he and the neighbors noticed that Dias' financial resources increased after the boy's disappearance and that the first PJ team did not believe the information received from both the prostitute and the family. Dias was an unhygienic person, however in the day of the disappearance he took two baths. When Manuel Mendonça got to the PJ they said it was not possible to extract anything from the suspect's clothes. Manuel Mendonça also said that Dias laughed while talking to Filomena Teixeira. He also said that the defendant's lawyer and family did not want to help to find Mendonça. The chief-inspector Henrique Noronha said in 2011 that in the reconstitution there was "a hiatus of time that we couldn't figure out (...) We were a bit perplexed [when Afonso Dias said that he] stood in a place looking at nothing and burning the midnight". The inspector also said that he did not understand the reason of not following the lead of Alcina Dias. Hélder Silva, that was one of the five children that saw Mendonça for the last time, told the Correio da Manhã that Dias "Was very weird. Afonso knew Rui Pedro's whole life, where he was, who he was with, what he would do the next day.
== Clinical significance == Patients with idiopathic achalasia show a significant difference in the distribution of SNPs affecting VIPR1. VIP and PACAP levels were decreased in anterior vaginal wall of stress urinary incontinence and pelvic organ prolapse patients, they may participate in the pathophysiology of these diseases.
Sources: en.wikipedia.org
=== Research parks and commercialization === Tech Parks Arizona is the research park of the University of Arizona. It comprises three primary facilities: the UA Tech Park at Rita Road, the UA Tech Park at The Bridges, and the University of Arizona Center for Innovation (UACI).
A data logger (also datalogger or data recorder) is an electronic device that records data over time or about location either with a built-in instrument or sensor or via external instruments and sensors. Increasingly, but not entirely, they are based on a digital processor (or computer), and called digital data loggers (DDL). They generally are small, battery-powered, portable, and equipped with a microprocessor, internal memory for data storage, and sensors. Some data loggers interface with a personal computer and use software to activate the data logger and view and analyze the collected data, while others have a local interface device (keypad, LCD) and can be used as a stand-alone device. Data loggers vary from general-purpose devices for various measurement applications to very specific devices for measuring in one environment or application type only. While it is common for general-purpose types to be programmable, many remain static machines with only a limited number or no changeable parameters. Electronic data loggers have replaced chart recorders in many applications. One primary benefit of using data loggers is their ability to automatically collect data on a 24-hour basis. Upon activation, data loggers are typically deployed and left unattended to measure and record information for the duration of the monitoring period. This allows for a comprehensive, accurate picture of the environmental conditions being monitored, such as air temperature and relative humidity.
Food grade wrapping paper and perforated polyethylene bags are the most suitable materials for packaging tempeh. They have demonstrated good retention of the quality of tempeh and extension of the shelf life of tempeh for three days compared to fresh tempeh. Appropriate packaging is important as it provides optimum oxygen supply and temperature for inoculation and fermentation to occur during processing. Tempeh is a perishable food and must be wrapped and placed into the refrigerator or freezer immediately after incubation or other processing steps such as blanching. In the refrigerator or freezer, stacking of tempeh should be minimized to prevent overheating and the undesirable, gradual continuation of fermentation, both of which shorten the storage life of tempeh. Even under cold temperature, tempeh continues to respire and undergo slow decomposition from microorganisms and its natural enzymes. Therefore, tempeh should be well cooled for at least two to five hours in a cooler before it undergoes further packaging. Tempeh packaged in perforated polyethylene bags is usually repacked inside another labeled, non-perforated bag for distribution, sale and easier labeling. If the tempeh is packaged in only one perforated bag, the label must be directly attached to the perforated surface with the use of government food contact approved adhesive. It is then bulk packed in cartons and returned to the refrigerator or freezer to await shipment.
Registered voters: 425,305, valid: 371,189, turnout: 87.3% To honour the exceptionally high percentage of pro-German votes in the district of Oletzko, with 2 votes for Poland compared to 28,625 for Germany, the district town Marggrabowa (i.e. Margrave town) was renamed "Treuburg" (TreueGerman = "loyalty") in 1928, with the district following this example in 1933. In the villages of Lubstynek (Klein Lobenstein), Czerlin (Klein Nappern) and Groszki (Groschken) in the District of Osterode in East Prussia (Ostróda), situated directly at the border, the majority voted for Poland and joined Poland after the plebiscite. Other Polish-majority villages were scarce but would have been more numerous if they had not been surrounded by Mazurian German disposed villages, which made a geographical connection with Poland improbable and so votes for Poland would not be useful. The strategic importance of the Prussian Eastern Railway line Danzig-Warsaw passing through the area of Soldau in the Neidenburg District caused it to be transferred to Poland without a plebiscite; it was renamed Działdowo.[1]
Vertical Agitation involves focusing on one part of a problem at a time, while holding oneself accountable for solving the problem – all the way to the highest level of government, business and society (such as advocating strongly for something: eco-friendly lightbulbs). This allows each individual in society to make vital "trivial" (read: small) changes, without being intimidated by the work needed to be done as a whole. Mackinnon added: a piecemeal approach also keeps individuals from becoming too 'holier than thou' (harassing friends and family about every possible improvement), where widespread practice of Vertical Agitation would lead to much improvement.
Sources: en.wikipedia.org
Several UK firms have made the move in order to pay Ireland's 12.5 per cent rate rather than the UK's 28 per cent rate. Diageo released a statement to the London Stock Exchange (LSE) denying the report. In 2017, Diageo made their beer suitable for consumption by vegetarians and vegans by introducing a new filtration process that avoided the use of isinglass, derived from fish bladders, to filter out yeast particles.
September 15 The US military announces that it destroyed two Iranian small boats the day before following an IRGC attempt to capture one of its Navy drones patrolling the Strait of Hormuz. A federal judge blocks the Kennedy Center from adding President Trump's name to the building or its grounds without congressional approval. Hours later, the centre's board votes to close most of the venue for up to two years for renovations. September 16 Three people are killed in a helicopter crash in Chatsworth, Los Angeles, including NBC News journalists Eliana Moreno and George Marciniw. The Federal Reserve raises interest rates for the first time in three years, from 3.5%-3.75% to 3.75%-4%. A memorandum of understanding is signed with the Pakistan army by US drone maker Powerus, which is set to merge with a firm backed by Trump’s sons. The Trump administration announces that Palestinian president Mahmoud Abbas and his delegation are barred from attending the UN General Assembly in New York, accusing them of breaching US law. September 17 The House of Representatives passes sweeping Russia sanctions legislation by a vote of 262-159. Flash flooding in the Navajo Nation kills three. A UN mission finds grounds to believe that the US committed war crimes in the 2026 Minab school attack and the 2026 Lamerd sports hall attack.
=== Nuclear weapons decommissioning === Waste from nuclear weapons decommissioning is unlikely to contain much beta or gamma activity other than tritium and americium. It is more likely to contain alpha-emitting actinides such as Pu-239 which is a fissile material used in nuclear bombs, plus some material with much higher specific activities, such as Pu-238 or Po. In the past the neutron trigger for an atomic bomb tended to be beryllium and a high activity alpha emitter such as polonium; an alternative to polonium is Pu-238. For reasons of national security, details of the design of modern nuclear bombs are normally not released to the open literature. Some designs might contain a radioisotope thermoelectric generator using Pu-238 to provide a long-lasting source of electrical power for the electronics in the device. It is likely that the fissile material of an old nuclear bomb, which is due for refitting, will contain decay products of the plutonium isotopes used in it. These are likely to include U-236 from Pu-240 impurities plus some U-235 from decay of the Pu-239; due to the relatively long half-life of these Pu isotopes, these wastes from radioactive decay of bomb core material would be very small, and in any case, far less dangerous (even in terms of simple radioactivity) than the Pu-239 itself.
Regenerating islet-derived protein 3 gamma (also Regenerating islet-derived protein III-gamma) is a protein that in humans is encoded by the REG3G gene. Intestinal paneth cells produce REG3G (or REG3 gamma) via stimulation of toll-like receptors (TLRs) by pathogen-associated molecular patterns (PAMPs). REG3 gamma specifically targets Gram-positive bacteria because it binds to their surface peptidoglycan layer. It is one of several antimicrobial peptides produced by paneth cells.
The WAV, run by the Ministry of Defence, recruited and trained female personnel for the WAAS and the WAMS, which respectively came under the Air and Defence Ministries. According to the official statement announcing their formation, the services' purpose was "to substitute women for men wherever necessary and practicable throughout the military and air forces within Southern Rhodesia." Recruitment for the women's services began in June 1941. Most volunteers were married women, many of them the wives of military men. The air and military services both offered a wide variety of positions. In addition to jobs as typists, clerks, caterers and the like, women served as drivers and in the stores and workshops. Many of the women in the air service did skilled work, checking flying instruments, testing parts and doing minor repairs. The women of the Auxiliary Police Service served as BSAP officers both in stations and on the streets. Members of Southern Rhodesia's white female population who did not join the forces still contributed to the war in various ways. Women worked in munitions factories and engineering workshops in Salisbury and Bulawayo. The Women's National Service League, which thousands of women joined before the war even started, revived the role white Rhodesian women had played in World War I, sending the colony's servicemen overseas parcels containing warm clothes, newspapers, razor blades, soap, food and minor luxuries such as sweets, tobacco and novels. Efforts such as these did much to keep the troops' morale up.
Sources: en.wikipedia.org
SR9009 is a synthetic research compound that acts on REV-ERB nuclear receptors. It is not approved for human use and is sold only as a research chemical. Its effects have been studied mainly in cells and rodents.
It binds REV-ERB alpha and REV-ERB beta and changes the expression of genes tied to metabolism and circadian rhythm. These changes can affect mitochondria and energy use in animal models. The exact chain from receptor binding to physiological outcome is still being mapped.
No reliable human trials show that SR9009 improves athletic performance. Some rodent studies report endurance changes, but these results are not proof of human benefit. Its use in sport is prohibited, and quality and safety data are lacking.
It is usually detected by LC-MS or HPLC-UV against a reference standard. In biological matrices, metabolite targeting can improve detection. No universal immunoassay is widely available.