A practical reference on research chemical: what it is, how it behaves, what the literature reports, and where the honest uncertainties sit.
Reviewed 2025-11-15. Anything still debated is marked as such rather than presented as settled.
SR9009 is a synthetic small molecule studied as an agonist of the nuclear receptors REV-ERBα and REV-ERBβ. These receptors help regulate circadian rhythms, lipid metabolism, and inflammatory gene expression. In cell and animal experiments, SR9009 alters transcription of clock-controlled genes and metabolic pathways. The compound is not a hormone and does not resemble classical steroid structures. Its activity depends on binding to the ligand-binding domain of REV-ERB, where it can modify corepressor recruitment.
Research interest in SR9009 grew from studies of circadian biology and metabolic disease. Preclinical reports describe effects on exercise capacity, muscle metabolism, and blood lipid levels in rodents, but these findings come from controlled laboratory settings. The compound has low oral bioavailability in animals, which limits systemic exposure after swallowing. Investigators often use injected routes in experiments to achieve measurable plasma concentrations. Human clinical data are sparse, no approved therapeutic product exists, and whether animal effects translate to humans remains an open question.
Stability depends on physical form, temperature, light exposure, and solvent. Solid SR9009 is generally stored cold and dry, with protection from light to limit degradation. Dimethyl sulfoxide stocks are common for laboratory work, but repeated freeze-thaw cycles can reduce compound integrity. Aqueous solutions may be less stable than organic stocks, and the ethyl ester in the structure can be susceptible to hydrolysis under certain conditions. Researchers typically validate storage conditions and recheck purity before quantitative experiments, especially when using archived material.
Regulatory treatment of SR9009 varies by country and region. It is not approved as a pharmaceutical, and several jurisdictions restrict its sale for human consumption. Some authorities classify it as a research chemical, a prescription-only substance, or a prohibited performance-enhancing agent in sport. Purchasers may encounter certificates of analysis, but these documents do not guarantee identity, purity, or legality. In research settings, institutional safety reviews and controlled procurement help ensure that materials are handled under appropriate oversight. The absence of harmonized rules means that legal status can change and requires verification.
| Property | Value | Notes |
|---|---|---|
| Chemical class | Synthetic REV-ERB agonist | Binds REV-ERBα and REV-ERBβ in preclinical models |
| Molecular formula | C20H24ClN3O4S | Reported for the parent compound |
| CAS Registry Number | 1379686-30-2 | Common identifier in chemical databases |
| Appearance | Off-white to pale yellow solid | Typical research chemical solid |
| Solubility | Soluble in DMSO and ethanol; low in water | Class: small organic molecule |
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.
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.
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.
SR9009 is frequently discussed alongside other REV-ERB ligands, including synthetic agonists and natural heme-related molecules. Its selectivity for REV-ERB over related nuclear receptors has been measured in binding and reporter assays, though off-target activity at higher concentrations is possible. The compound is prohibited in sport by the World Anti-Doping Agency, and it is not approved for any medical use in major jurisdictions. Products sold online may be labeled as research chemicals, and their identity and purity are not guaranteed by regulatory review.
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.
=== Mechanism of action === Clindamycin phosphate is a water-soluble ester of the semi-synthetic antibiotic clindamycin, which is synthesized from lincomycin. Like the macrolide antibiotics, it acts as a bacteriostatic agent by interfering with the 50S subunit of the ribosome of Cutibacterium acnes, inhibiting bacterial protein synthesis and preventing bacteria from replicating. C. acnes plays a role in the development of acne. Benzoyl peroxide also kills C. acnes, but by releasing free radical oxygen species, thus oxidizing bacterial proteins. Also, it dries out the area by reducing sebum production, prevents clogged pores, and is a keratolytic agent. Since benzoyl peroxide is an oxidizer, not an antibiotic, it is not subject to C. acnes resistance unlike clindamycin. Both ingredients have been shown to reduce the number of acne lesions with statistical significance.
The organized criminal groups in Albania had long been involved in several illicit activities, including drug trade, arms and human trafficking, kidnapping, murders and others. Such criminals were attracted to the United Arab Emirates to seek refuge and to launder their illegal wealth. The UAE lacked regulations to combat the issue of terror funding and money laundering. Consequently, it became a safe haven for criminals from Albania and other Balkan countries, who escaped justice and continued to carry out their illegal activities while living in the Emirates. For countries like Albania, the complications were greater, due to the lack of bilateral extradition treaty with the UAE. Authorities in Albania struggled and failed to get most of the criminals extradited from the Emirates. Usually, the Gulf nation doesn't refuse to extradite these criminals, but it used to extend the process to the point of their release.
=== Acquired === Methemoglobinemia may be acquired. Classical drug causes of methemoglobinemia include various antibiotics (trimethoprim, sulfonamides, and dapsone), local anesthetics (especially articaine, benzocaine, prilocaine, and lidocaine), and aniline dyes, metoclopramide, rasburicase, umbellulone, chlorates, bromates, and nitrites. Nitrates are suspected to cause methemoglobinemia. In otherwise healthy individuals, the protective enzyme systems normally present in red blood cells rapidly reduce the methemoglobin back to hemoglobin and hence maintain methemoglobin levels at less than one percent of the total hemoglobin concentration. Exposure to exogenous oxidizing drugs and their metabolites (such as benzocaine, dapsone, and nitrates) may lead to an increase of up to a thousandfold of the methemoglobin formation rate, overwhelming the protective enzyme systems and acutely increasing methemoglobin levels. Infants under six months of age have lower levels of a key methemoglobin reduction enzyme (NADH-cytochrome b5 reductase) in their red blood cells. This results in a major risk of methemoglobinemia caused by nitrates ingested in drinking water, dehydration (usually caused by gastroenteritis with diarrhea), sepsis, or topical anesthetics containing benzocaine or prilocaine resulting in blue baby syndrome. Nitrates used in agricultural fertilizers may leak into the ground and may contaminate well water. The current EPA standard of 10 ppm nitrate-nitrogen for drinking water is specifically set to protect infants.
On the other hand, other than the lightest nuclides, nuclides with an odd number of protons and an odd number of neutrons (odd Z, odd N) are usually short-lived (a notable exception is neptunium-236 with a half-life of 154,000 years) because they readily decay by beta-particle emission to their isobars with an even number of protons and an even number of neutrons (even Z, even N) becoming much more stable. The physical basis for this phenomenon also comes from the pairing effect in nuclear binding energy, but this time from both proton–proton and neutron–neutron pairing. The relatively short half-life of such odd-odd heavy isotopes means that they are not available in quantity and are highly radioactive. According to the fissility rule proposed by Yigal Ronen, for a heavy element with Z between 90 and 100, an isotope is fissile if and only if 2 × Z − N ∈ {41, 43, 45} (where N = number of neutrons and Z = number of protons), with a few exceptions. This rule holds for all but fourteen nuclides – seven that satisfy the criterion but are nonfissile, and seven that are fissile but do not satisfy the criterion.
Sources: en.wikipedia.org
Faced with the loss of support for his government, President Rodríguez Zapatero decided to bring forward the general elections by four months, to November 2011. The People's Party won an absolute majority of 186 deputies – its best result in history – while the PSOE only managed 110 deputies – its worst result until then. The United Left coalition, led by Cayo Lara, won 11 deputies. UPyD of Rosa Díez won 5 deputies, the Basque coalition Amaiur won six seats with a program defending the right of self-determination of Euskadi, and CiU displaced the PSC as the most voted party in Catalonia. The Socialists, big losers in the elections, held the 38th Federal Congress of the PSOE in February 2012, in Seville, in which Alfredo Pérez Rubalcaba was elected secretary general by a narrow margin against Carme Chacón. On December 20, 2011, the leader of the PP Mariano Rajoy was invested as the sixth president of the Government of democracy.
When a specimen arrives in the microbiology laboratory, it is inoculated into an agar plate and placed in an incubator to encourage microbial growth. Because the appearance of microbial colonies changes as they grow, colonial morphology is examined at a specific time after the plate is inoculated. Usually, the plate is read at 18–24 hours post-inoculation, but times may differ for slower-growing organisms like fungi. The microbiologist examines the appearance of the colony, noting specific features such as size, colour, shape, consistency, and opacity. A hand lens or magnifying glass may be used to view colonies in greater detail. The opacity of a microbial colony can be described as transparent, translucent, or opaque. Staphylococci are usually opaque, while many Streptococcus species are translucent. The overall shape of the colony may be characterized as circular, irregular, or punctiform (like pinpoints). The vertical growth or elevation of the colony, another identifying characteristic, is assessed by tilting the agar plate to the side and is denoted as flat, raised, convex, pulvinate (very convex), umbilicate (having a depression in the centre) or umbonate (having a bump in the centre). The edge of the colony may be separately described using terms like smooth, rough, irregular and filamentous. Bacillus anthracis is notable for its filamentous appearance, which is sometimes described as resembling Medusa's head. Consistency is examined by physically manipulating the colony with a sterile instrument. It is described using terms like brittle, creamy, sticky and dry.
Selenocysteine is incorporated into some proteins at a UGA codon, which is normally a stop codon. Pyrrolysine is incorporated into some proteins at a UAG codon. For instance, in some methanogens in enzymes that are used to produce methane. Besides those used in protein synthesis, other biologically important amino acids include carnitine (used in lipid transport within a cell), ornithine, GABA and taurine.
Sources: en.wikipedia.org
Measles vaccine is a live attenuated vaccine that protects against becoming infected with measles. Nearly all of those who do not develop immunity after a single dose develop it after a second dose. When the rate of vaccination within a population is greater than 92%, outbreaks of measles typically no longer occur; however, they may occur again if the rate of vaccination decreases. The vaccine's effectiveness lasts many years. It is unclear if it becomes less effective over time. The vaccine may also protect against measles if given within a couple of days after exposure to measles. Measles is a highly contagious viral illness that can lead to serious complications, including pneumonia, acute encephalitis, and, in rare cases, long‑term neurological disease. Pregnant women are at increased risk of severe respiratory complications and adverse pregnancy outcomes such as pregnancy loss and premature birth. The vaccine is generally safe, even for those infected by HIV. Most children do not experience any side effects; those that do occur are usually mild (such as fever, rash, pain at the site of injection, and joint stiffness) and short-lived. Anaphylaxis has been documented in about 3.5–10 cases per million doses. Rates of Guillain–Barré syndrome, autism and inflammatory bowel disease do not appear to be increased by measles vaccination. The vaccine is available both by itself and in combinations such as the MMR vaccine (a combination with the rubella vaccine and mumps vaccine) or the MMRV vaccine (a combination of MMR with the chickenpox vaccine).
We will always have to leave Jaén by Maynas and advance if possible our limits of the coast beyond Tumbes." After noticing, with disgust, the good image that Peru had (above Colombia and Venezuela) in the towns of Guayaquil, Cuenca and Loja in present-day Ecuador, either because the majority of its inhabitants were Quechua-speaking, or because of the proximity they had with the departments of Piura and Cajamarca, with which they had more trade and exchange than with Viceroyalty of New Granada, which was disconnected from the area by natural barriers in the Andes and the Pacific Ocean (arguments given by the Peruvian Francisco María Roca); harming applying the Free Determination of the peoples in their favor (in fact, the annexation of these territories to Gran Colombia would have been done in authoritarian and illegal ways), which would be aggravated by the centralist and authoritarian policies of the Bolivarian government, whose laws generated discontent in the Southern District.
Because of its spread with humans worldwide, there has been some uncertainty about its exact original, native range, although it has been recognized as being likely in the subtropical parts of the Afro-Eurasia, thus with a preference for warmer climates, and recent authorities regards it as only native to Asia. As a synanthropic species, Pholcus phalangioides has largely had its modern geographic distribution determined by the spread of humans around the world. Today, these spiders can be found in most of the temperate countries of every continent in the world. P. phalangioides are not suited for survival in cold environments, which is why they prefer the warmth of the indoors when in these regions, specifically inside human dwellings. These spiders have a particular affinity for dimly lit, dark areas that are quiet and calm. They are commonly found in the corners of buildings and people's homes as well as in attics. Populations of Pholcus phalangioides living outdoors can be found in caves and in between rock crevices.
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.
Sources: en.wikipedia.org
SR9009 is a synthetic small molecule studied as an agonist of the REV-ERB nuclear receptors. It is not an approved medicine, and its effects in humans are not well characterized.
No. It is a synthetic ligand that binds nuclear receptors, not a steroid or peptide hormone. Its activity depends on receptor binding rather than endocrine secretion.
Clinical evidence is limited. Most published data come from cell and animal experiments. Human safety and efficacy remain uncertain.
The most common approach is liquid chromatography-tandem mass spectrometry, often after extraction from blood, urine, or tissue. Ultraviolet detection and nuclear magnetic resonance spectroscopy are used mainly for reference material characterization. Isotope-labeled internal standards improve accuracy.