This is a working overview of circadian clock, written for readers who want more than a one-paragraph summary but less than a textbook.
Reviewed 2025-11-18. Anything still debated is marked as such rather than presented as settled.
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.
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 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.
SR9009 is supplied as a solid research chemical, often in milligram quantities. Laboratories typically weigh it in a controlled environment because fine powders can disperse. Stock solutions are commonly prepared in dimethyl sulfoxide and stored in small aliquots to reduce freeze-thaw cycles. Personal protective equipment and chemical fume hoods are standard when handling unknown or potent compounds. These practices address laboratory safety rather than human use.
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.
| Property | Value | Notes |
|---|---|---|
| Common name | SR9009 | Also referred to as Stenabolic in non-scientific contexts. |
| Chemical class | Synthetic small molecule | Not a steroid or peptide hormone. |
| Receptor target | REV-ERBα and REV-ERBβ | Nuclear receptor agonist in preclinical studies. |
| Development status | Investigational | No approved human therapeutic indication. |
| Regulatory attention | Prohibited in sport | Listed by anti-doping authorities. |
Storage conditions for research-grade SR9009 generally involve a freezer at approximately minus twenty degrees Celsius, sometimes lower for long-term preservation. Containers should remain tightly closed and protected from light. Desiccants may be used to limit moisture uptake. Solutions are often stored in aliquots to avoid repeated warming and cooling. Stability data for the compound under various conditions are limited, so laboratories typically follow supplier recommendations and verify performance through periodic analytical checks rather than assuming indefinite stability.
Identity and purity testing for SR9009 commonly uses liquid chromatography coupled with tandem mass spectrometry. This method separates the compound from matrix components and detects it by mass-to-charge transitions, providing sensitive and specific confirmation. Nuclear magnetic resonance spectroscopy can support structural identification, while high-performance liquid chromatography with ultraviolet detection may estimate purity. Because online products labeled as SR9009 may contain other substances or no active compound at all, independent verification is important in research settings. Certificates of analysis are useful but not a substitute for in-house testing.
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.
==== Mesenchymal stromal cells (MSCs) ==== Scientists reported 2012 that MSCs when transfused immediately within few hours post thawing may show reduced function or show decreased efficacy in treating diseases as compared to those MSCs which are in log phase of cell growth (fresh), so cryopreserved MSCs should be brought back into log phase of cell growth in in vitro culture before administration. Re-culturing of MSCs will help in recovering from the shock the cells get during freezing and thawing. Various MSC clinical trials which used cryopreserved product immediately post thaw have failed as compared to those clinical trials which used fresh MSCs.
=== Natural toxins === Several foods can naturally contain toxins, many of which are not produced by bacteria. Plants in particular may be toxic; animals which are naturally poisonous to eat are rare. In evolutionary terms, animals can escape being eaten by fleeing; plants can use only passive defenses such as poisons and distasteful substances, for example capsaicin in chili peppers and pungent sulfur compounds in garlic and onions. Most animal poisons are not synthesised by the animal, but acquired by eating poisonous plants to which the animal is immune, or by bacterial action.
Also in 2003, Freeman starred in two other dramas that were not widely seen, Levity and Guilty by Association. His 2004 releases were comedy The Big Bounce and sports drama Million Dollar Baby. In the latter, directed by Clint Eastwood, Freeman portrayed an elderly former boxer. The film won four Academy Awards, including Best Picture, Best Director, Best Actress (Hilary Swank), and Best Supporting Actor, earning Freeman his first Academy Award. Freeman was also nominated for a Golden Globe Award in the same category. Roger Ebert complimented Freeman's "flat and factual" narration, and Timeout magazine thought the cast fully inhabited their roles.
In 2025, Alveus rescued a former pet emu, Nolie. She was named by Mr.Beast after helping in her rescue and helping the sanctuary through donations. Another popular Emu on social media is Emmanuel, a resident of Knuckle Bump Farms in south Florida. Taylor Blake, the farm's owner, since 2013 has recorded video shorts explaining aspects of the farm and is often interrupted as Emmanuel the Emu photobombs her videos, earning constant rebukes; the term "Emmanuel don't do it!" has become popular on social media.
=== Activation === An activator of ALDH2 enzymatic activity, Alda-1 (N-(1,3-benzodioxol-5-ylmethyl)-2,6-dichlorobenzamide), has been shown to reduce ischemia-induced cardiac damage caused by myocardial infarction. Mirivadelgat has also been reported to activate ALDH2.
Sources: en.wikipedia.org
=== Implementation === On May 10, 1977, Oklahoma became the first U.S. state to approve lethal injection when Governor David Boren signed a bill into law. Episcopal Reverend Bill Wiseman had introduced it into the Oklahoma legislature, where it passed and was quickly sent to the Governor's desk (Title 22, Section 1014(A)). The next day, Texas became the second U.S. state to approve a lethal injection law. Since then, until 2004, 37 of the 38 states using capital punishment introduced lethal injection statutes (the last state, Nebraska, maintained electrocution as its sole method until adopting injection in 2009, after its Supreme Court deemed the electric chair unconstitutional). On May 11, 1977, the day after the new method had become state law, Oklahoma's state medical examiner, Jay Chapman, proposed a new, less painful method of execution known as Chapman's protocol: "An intravenous (IV) saline drip shall be started in the prisoner's arm, into which shall be introduced a lethal injection consisting of an ultrashort-acting barbiturate in combination with a chemical paralytic." The Chapman protocol was approved by anesthesiologist Stanley Deutsch, formerly Head of the Department of Anesthesiology of the University of Oklahoma College of Medicine. On August 29, 1977, Texas adopted the new method of execution, switching from electrocution. On December 7, 1982, Texas became the first U.S. state or territory in the world to use lethal injection to carry out capital punishment, for the execution of Charles Brooks, Jr.
== Career == Larsen worked for more than 35 years at DuPont. In her research in mass spectrometry, she worked with a number of ionization sources, from electrospray ionization, matrix-assisted laser desorption/ionization, solid probe introduction with corona discharge ionization, to laserspray ionization. Her fluorinated polymer extraction method, the Larsen method, is required by the Environmental Protection Agency for consumer safety. She is a consultant at Larsen Scientific Consulting. She serves on the editorial advisory board of Spectroscopy. She was an editor for the Journal of the American Society for Mass Spectrometry. She served on a number of board positions for the American Society for Mass Spectrometry: treasurer (1992-1994), vice president for programs (2004-2006), president (2006-2008), and past president (2008-2010). She was elected as an American Chemical Society Fellow in 2017.
From its inception, Livermore focused on new weapon design concepts; as a result, its first three nuclear tests were unsuccessful. The lab persevered and its subsequent designs proved increasingly successful. In 1957, the Livermore Lab was selected to develop the warhead for the Navy's Polaris missile. This warhead required numerous innovations to fit a nuclear warhead into the relatively small confines of the missile nosecone. During the Cold War, many Livermore-designed warheads entered service. These were used in missiles ranging in size from the Lance surface-to-surface tactical missile to the megaton-class Spartan antiballistic missile. Over the years, LLNL designed the warheads: W27 (Regulus cruise missile; 1955; joint with Los Alamos), W38 (Atlas/Titan ICBM; 1959), B41 (B52 bomb; 1957), W45 (Little John/Terrier missiles; 1956), W47 (Polaris SLBM; 1957), W48 (155-mm howitzer; 1957), W55 (submarine rocket; 1959), W56 (Minuteman ICBM; 1960), W58 (Polaris SLBM; 1960), W62 (Minuteman ICBM; 1964), W68 (Poseidon SLBM; 1966), W70 (Lance missile; 1969), W71 (Spartan missile; 1968), W79 (8-in. artillery gun; 1975), W82 (155-mm howitzer; 1978), B83 (modern strategic bomb; 1979), and W87 (LGM-118 Peacekeeper/MX ICBM; 1982). The W87 and the B83 are the only LLNL designs still in the U.S. nuclear stockpile. With the collapse of the Soviet Union in 1991 and the end of the Cold War, the United States began a moratorium on nuclear testing and development of new nuclear weapon designs.
=== Writing === Many central plot elements existed before designer Brian Mitsoda's involvement: the prince, the anarchs being upset, aspects of the Gehenna storyline, and Jack and the sarcophagus as a major subplot. The designers broadly tied the overarching story into each hub and level. Each designer controlled their assigned section of the game and worked with a small team, enabling quick decision-making and ease in keeping plot elements consistent. Mitsoda became the primary writer for many of the characters and their quests, dialog, and side content in the game, such as emails, which helped retain a consistent narrative. He was given freedom with respect to the script, with no restrictions on language or content, and could rewrite characters when he thought his initial draft was weak. Although Troika developed the story, it is inspired by White Wolf's Time of Judgment novels about a vampire apocalypse. Bloodlines' story was accepted as canonical by White Wolf, with the game serving as a prequel to Time of Judgment and including characters from the White Wolf game, such as Jack. Discussing character design, Mitsoda said he tried to disguise the need for characters who point a player in an appropriate direction:
Sources: en.wikipedia.org
Bolivia's most lucrative crop and economic activity in the 1980s was coca, whose leaves were processed clandestinely into cocaine. The country was the second largest grower of coca in the world, supplying approximately fifteen percent of the US cocaine market in the late 1980s. Analysts believed that exports of coca paste and cocaine generated between US$600 million and US$1 billion annually in the 1980s (depending on prices and output). Based on these estimates, coca-related exports equaled or surpassed the country's legal exports. Coca has been grown in Bolivia for centuries. The coca plant, a tea-like shrub, was cultivated mostly by small farmers in the Chapare and Yungas regions. About 65 percent of all Bolivian coca was grown in the Chapare region of Cochabamba Department; other significant coca-growing areas consisted of the Yungas of La Paz Department and various areas Santa Cruz and Tarija departments. Bolivian farmers rushed to grow coca in the 1980s as its price climbed and the economy collapsed. Soaring unemployment also contributed to the boom. In addition, farmers turned to coca for its quick economic return, its light weight, its yield of four crops a year, and the abundance of United States dollars available in the trade, a valuable resource in a hyperinflated economy. The Bolivian government estimated that coca production had expanded from 1.63 million kilograms of leaves covering 4,100 hectares in 1977 to a minimum of 45 million kilograms over an area of at least 48,000 hectares in 1987.
The College of Allied Health Sciences (CAHS) provides education for allied health and health science professionals. CAHS became a college at the University of Cincinnati in March 1998. Its programs originated from various colleges at the University of Cincinnati.
=== Amplifying fluorescent polymer === Amplifying fluorescent polymer (AFP) is a promising new technology and is based on synthesized polymers which bind to explosive molecules and give an amplified signal upon detection. When compounds that are not polymers are utilized for such purpose, the quenching of the fluorescence by the traces of explosives is not detectable. When amplifying fluorescent polymer in thin films absorbs a photon of light, excited state polymers (excitons) are able to migrate along the polymer backbone and between the adjacent polymer films. These sensors were originally made in order to detect trinitrotoluene. In AFP, binding of one TNT molecule results in quenching of fluorescence significantly due to the conjugated structure of the polymers. It has been reported that in practice the polymers result in 100-1000 fold increase of amplification of the quenching response. "During its excited state lifetime, the exciton propagates by a random walk through a finite volume of the polymer film." Once TNT, or any other electron-deficient (i.e., electron accepting) molecule comes in contact with the polymer, a so-called low-energy ‘trap’ forms. "If the exciton migrates to the site of the bound electron-deficient molecule before transitioning back to the ground state, the exciton will be trapped (a non-radioactive process), and no fluorescence will be observed from the excitation event.
== Toxicity == The recommended therapeutic dose is 80-100 mg/m2 body area. Optimal dosage is determined based on measurements of unbound platinum concentration following intravenous infusion, combined with rate of creatine clearance as an assessment of renal function using Ishibashi’s formula: DoseNDP = AUC × CLNDP, where CLNDP = 0.0738 × creatinine clearance + 4.47 The exact mechanism of uptake into the cell is unknown, with information being considerably less available compared to cisplatin. What is known is that nedaplatin does not interact with the Oct2 or apical multidrug and toxin extrusion transporter (MATE) transporters, potentially explaining the difference in nephrotoxicity due to reduced accumulation in the proximal tubules of the kidney. Toxicogenomics has helped elucidate some of the mechanisms behind nephrotoxicity, where oxidative stress has been shown to deregulate gene expression via Hmox1 and other genes.
Around the time, an expert concludes that "AI art is everywhere right now", with even experts not knowing what it will mean, a news outlet establishes that "AI-generated art booms" and reports about issues of copyright and automation of professional artists, a news outlet investigates how online communities (e.g. their rules) confronted with many such artworks react, a news outlet raised concerns over deepfakes, a magazine highlights possibilities of enabling "new forms of artistic expression", an editorial notes that it may be seen as a welcome "augmentation of human capability". Moreover, additional functionalities – such as enabling the use of user-provided concepts (like an object or a style) learned from few images for novel personalized art generated from the associated word/s (2 Aug) or expanding beyond the borders of artistic images in the same style (31 Aug) – are reported. On 22 August, Stable Diffusion is released as free and open source software.
Sources: en.wikipedia.org
It is a synthetic compound studied as an agonist of REV-ERB nuclear receptors. It is not an approved medicine and has mainly been examined in laboratory and animal research.
No. It is a small molecule that binds nuclear receptors involved in circadian regulation. Its classification differs from anabolic steroids or peptide hormones.
Published human clinical trial data are lacking. Most safety and activity information comes from preclinical models, so effects in people remain uncertain.
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.