A practical reference on analytical standard: what it is, how it behaves, what the literature reports, and where the honest uncertainties sit.
This page was last updated on 2026-06-07 and is reviewed periodically as new material appears.
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.
In rodent studies, SR9009 has been reported to increase mitochondrial content in skeletal muscle and improve exercise endurance under some conditions. These findings led to popular descriptions such as an exercise mimetic, although that term oversimplifies the biology. Effects vary by dose, timing, tissue, and model. The compound's influence on circadian pathways means that time of administration can matter in experiments. Whether similar metabolic changes occur in humans remains largely unexplored in controlled published trials.
Pharmacokinetic data for SR9009 are limited in published literature. Some reports indicate low oral bioavailability and rapid clearance in animals, which complicates interpretation of exposure and effect. Researchers often use injected routes in preclinical work to achieve measurable systemic levels. Analytical studies rely on mass spectrometry to detect the parent compound and its metabolites. Questions about tissue distribution, active metabolites, and long-term consequences remain open. Species differences in metabolism can affect observed half-life and target engagement.
| 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. |
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.
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.
According to the Nigerian constitution, all minerals, gas, and oil the country possesses are legally the property of the Nigerian Federal Government. The revenue gained by the NNPC accounts for 76% of federal government revenue and 40% of the entire country's GDP. As of 2000, oil and gas exports account for 98% of Nigerian export earnings.
=== Singer-songwriter === In 1996, Sheik released his self-titled debut album, which was certified gold. The album featured the hit single "Barely Breathing", which peaked at number 16 and remained on the Billboard Hot 100 for 55 consecutive weeks. "Barely Breathing" also enjoyed Top 20 success on Adult Contemporary radio, reached No. 2 on the Adult Top 40 charts, and garnered Sheik a Grammy Award nomination for Best Male Pop Vocal Performance. In 1998, Sheik recorded "Embraceable You" for Red Hot + Rhapsody, a George Gershwin tribute, and also recorded "Songbird" for another tribute, Legacy: A Tribute to Fleetwood Mac's Rumours. Also in 1998, Sheik released Humming, which featured orchestral and string arrangements. Sheik sang a duet with singer Howard Jones on Jones' 2000 single entitled Someone You Need. He released Phantom Moon, a Nick Drake-influenced album created in collaboration with poet and playwright Steven Sater, in 2001. The following year, Sheik released Daylight, which included the singles "On a High" and "Half-Life". After a four-year recording break, Sheik released White Limousine (2006), which included a DVD allowing listeners to remix and reinterpret songs from the album. In 2009, he released Whisper House, a concept album which provided the score for the musical of the same name. The stage musical premiered at The Old Globe Theatre in San Diego in January 2010, after a workshop at Vassar College, produced by New York Stage and Film in 2009. In 2011, Sheik released Covers 80s, an album including covers of popular 1980s songs.
Plant hormones (or phytohormones) are signal molecules, produced within plants, that occur in extremely low concentrations. Plant hormones control all aspects of plant growth and development, including embryogenesis, the regulation of organ size, pathogen defense, stress tolerance and reproductive development. Unlike in animals (in which hormone production is restricted to specialized glands) each plant cell is capable of producing hormones. Went and Thimann coined the term "phytohormone" and used it in the title of their 1937 book. Phytohormones occur across the plant kingdom, and even in algae, where they have similar functions to those seen in vascular plants ("higher plants"). Some phytohormones also occur in microorganisms, such as unicellular fungi and bacteria, however in these cases they do not play a hormonal role and can better be regarded as secondary metabolites.
=== Distribution === Ceftriaxone penetrates tissues and body fluids well, including cerebrospinal fluid to treat central nervous system infections. Ceftriaxone is reversibly bound to human plasma proteins and the binding of ceftriaxone decreases with increasing concentration from a value of 95% at plasma concentrations less than 25 mcg/mL to 85% at plasma concentration of 300 mcg/mL. Over a 0.15 to 3 g dose range in healthy adult subjects, the apparent volume of distribution ranged from 5.8 to 13.5 L.
Sources: en.wikipedia.org
The resulting campaign was costly for both sides, but ultimately ended in disaster for France and the near-destruction of Napoleon's Grande Armée. French forces retreated from Russia by December 1812 and began reconstituting their lost strength. Encouraged by the defeat, Austria, Prussia, and several minor powers joined Russia, Britain, and Spain in a Sixth Coalition and began a campaign against France. The Sixth Coalition defeated Napoleon at Leipzig in October 1813. The allies then invaded France on two fronts: the Russians, Austrians, and Prussians invaded France from the east, while the British, Spanish, and Portuguese invaded France from the west. Coalition troops captured Paris in March 1814, forced Napoleon to abdicate in April, exiled him to the island of Elba, and restored power to the Bourbons. Napoleon escaped exile in February 1815 and reassumed control of France for around one hundred days, igniting the eponymous conflict. The allies formed the Seventh Coalition, which defeated him at Waterloo in June 1815 and exiled him to Saint Helena, where he died in 1821. The wars had profound consequences on history. New methods of warfare were introduced, including mass conscription and guerrilla warfare. Politically, the wars greatly influenced Europe through the advancements in civil law brought about by the Napoleonic Code, which was largely retained where it was adopted, and the spread of nationalism and liberalism. Independence movements emerged in Spanish America as a direct consequence of the wars, leading to the decline of the Spanish and Portuguese Empires.
The gross (macroscopic) appearance of the brain in Alzheimer's disease is variable. In many cases the cortical sulci are widened and the gyri are shrunken, but the degree of cortical atrophy varies. It can sometimes be difficult to discern, particularly in the very elderly. The areas most affected by atrophy are the medial temporal lobe including the hippocampal formation, the amygdala, the frontal lobe and the parietal lobe; the occipital lobe is relatively unaffected by atrophy. The volume of the ventricles increases in parallel with cortical shrinkage. Studies using MRI and PET have documented reductions in the size of specific brain regions in people with Alzheimer's disease as they progress from mild cognitive impairment to Alzheimer's disease, and in comparison with similar images from healthy older adults. These macroscopic changes in the brain are not specific to Alzheimer's and can occur in other disorders and to some extent in normal aging. At the microscopic level, the defining histopathologic characteristics of Alzheimer's disease are abundant amyloid plaques and neurofibrillary tangles in certain brain regions. Both of these abnormalities are clearly visible by microscopy, and amyloid imaging. In the early stages of disease, tangles are present mainly in the medial temporal lobe and plaques are present mainly in the neocortex, but as the disease progresses the lesions proliferate throughout much of the brain.
== Background == The Boat Race is a side-by-side rowing competition between the University of Oxford (sometimes referred to as the "Dark Blues") and the University of Cambridge (sometimes referred to as the "Light Blues"). First held in 1829, the race takes place on the 4.2-mile (6.8 km) Championship Course on the River Thames in southwest London. The rivalry is a major point of honour between the two universities; it is followed throughout the United Kingdom and broadcast worldwide. Oxford went into the race as reigning champions, having won the 1992 race by 1+1⁄4 lengths, with Cambridge leading overall with 69 victories to Oxford's 68 (excluding the "dead heat" of 1877). Oxford had won 16 of the previous 17 races, a run interrupted by Cambridge's seven-length victory in the 1986 race. The first Women's Boat Race took place in 1927, but the event did not become an annual fixture until the 1960s. Until 2014, the contest was conducted as part of the Henley Boat Races, but as of the 2015 race, it is held on the River Thames, on the same day as the men's main and reserve races. The reserve race, contested between Oxford's Isis boat and Cambridge's Goldie boat has been held since 1965. It usually takes place on the Tideway, prior to the main Boat Race.
Sources: en.wikipedia.org
Lucas, the youngest Marine to receive the Medal of Honor, who then re-enlisted and became a Captain in the 82nd Senator Dave McCormick (born 1965), Captain who served in the Gulf War Wes Moore, 63rd governor of Maryland Platoon Forward Observer and Member of USA National Bobsled Team Lou Moreira Country music singer Craig Morgan (born 1964) Patrick Murphy, Under Secretary of the Army (born 1973) Actor Noble Craig, Vietnam War R&B singer Lou Rawls Sergeant in B Co 2/505 ABN INF 1956–58 Senator Jack Reed (born 1949) Dennis Richmond, journalist Syracuse University football coach Ben Schwartzwalder General "Henry" Hugh Shelton (Chairman of the Joint Chiefs of Staff from 1997 to 2001) Private John Steele who famously got hung up on a parapet of the church bell tower when jumping into Sainte-Mère-Église during the first hours of D-Day. Senator Strom Thurmond (325th Glider Infantry Regiment in World War II) Actor William Windom Colonel Benjamin H. Vandervoort who led the 2nd Battalion, 505th PIR on D-Day and the 3rd Battalion, 504th PIR during Operation Market Garden. Sergeant Alvin C. York (Medal of Honor recipient), World War I Trae Stewart Spurlock a 2x combat veteran killed by the Casper Police Department James Megellas One of the most decorated veterans of the 82nd
Flaxen chestnut and blond chestnut are terms that describe manes and/or tails that are flaxen, or significantly lighter than the body color. Sometimes this difference is only a shade or two, but other flaxen chestnuts have near-white or silverish manes and tails. Haflingers are exclusively of this shade. It is considered desirable in other breeds, though the genetic mechanism is not fully understood. Some flaxen chestnuts can be mistaken for palominos and have been registered in palomino color registries. Pangaré or mealy is thought to be controlled by a single gene, unrelated to chestnut color, and produces distinct characteristics common to wild equids: pale hairs around the eyes and muzzle and a pale underside. Haflingers and Belgians are examples of mealy chestnuts. The flaxen characteristic is sometimes associated with pangaré.
Byzantine territories fragmented into competing political entities. The crusaders crowned Baldwin I as the ruler of a new Latin Empire in Constantinople; it soon suffered a crushing defeat against the Bulgarians in 1205. It also failed to expand west or east, where three successor states had formed: the Empire of Nicaea and the Empire of Trebizond in Asia Minor, and the Despotate of Epirus on the Adriatic. The Venetians acquired many ports and islands, and the Principality of Achaea emerged in southern Greece. Trebizond lost the key port of Sinope in 1214 and thereafter played little role away from the southeastern Black Sea. For a time, Epirus appeared well placed to reclaim Constantinople from the Latins, and its ruler Theodore Doukas crowned himself emperor, but he suffered a critical defeat at the Battle of Klokotnitsa in 1230, and Epirote power waned. Nicaea, ruled by the Laskarid dynasty and drawing on both Byzantine refugees and local populations, blocked the Latins and the Seljuks of Rum from expanding east and west respectively. John III (r. 1221–1254) strengthened Nicaea militarily, economically, and diplomatically. He discouraged imports and promoted local production, and he made many diplomatic treaties, especially after Mongol armies ravaged Bulgaria and defeated Rum between 1237 and 1243. This chaos was an opportunity for John, and he fought many successful campaigns against the states disrupted by the Mongol invasions. Soon after his death, his grandson was usurped by Michael VIII, founder of the Palaiologos dynasty, who recaptured Constantinople in 1261.
The use of bioorthogonal chemistry typically proceeds in two steps. First, a cellular substrate is modified with a bioorthogonal functional group (chemical reporter) and introduced to the cell; substrates include metabolites, enzyme inhibitors, etc. The chemical reporter must not alter the structure of the substrate dramatically to avoid affecting its bioactivity. Secondly, a probe containing the complementary functional group is introduced to react and label the substrate. Although effective bioorthogonal reactions such as copper-free click chemistry have been developed, development of new reactions continues to generate orthogonal methods for labeling to allow multiple methods of labeling to be used in the same biosystems. Carolyn R. Bertozzi was awarded the Nobel Prize in Chemistry in 2022 for her development of click chemistry and bioorthogonal chemistry.
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.
It is a synthetic research compound that activates REV-ERB nuclear receptors. It is not an approved drug or dietary supplement. Most information comes from cell and animal studies.