A practical reference on research chemical: what it is, how it behaves, what the literature reports, and where the honest uncertainties sit.
Reviewed 2025-11-18. Anything still debated is marked as such rather than presented as settled.
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.
Laboratory samples of SR9009 are typically supplied as a white to off-white powder. The compound dissolves readily in organic solvents such as dimethyl sulfoxide and ethanol, while its solubility in water is low. Because of this solubility profile, researchers often prepare concentrated stock solutions in an organic solvent before diluting them into aqueous assay buffers. Light exposure, moisture, and repeated freeze-thaw cycles can degrade many small molecules, so handling procedures usually aim to minimize these factors. Purity is commonly checked before use.
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.
Regulatory and sporting contexts treat SR9009 as a prohibited substance in many elite competitions. Its presence on banned lists reflects concerns about performance enhancement and unknown long-term safety. Analytical chemists have developed methods to detect the parent compound and its metabolites in urine and blood. Literature discussions distinguish between in vitro potency, animal pharmacology, and anecdotal human reports. The latter are difficult to verify because products sold online may lack purity or contain different compounds.
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.
| Property | Value | Notes |
|---|---|---|
| Appearance | White to off-white powder | Typical for research-grade material |
| Solubility | Soluble in DMSO and ethanol; low aqueous solubility | Organic stock solutions are common |
| Typical storage temperature | -20 °C or lower | Protect from light and moisture |
| Common analytical method | LC-MS/MS | Used for detection and confirmation |
| Common synonyms | SR9009; Stenabolic | Stenabolic is an informal name |
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.
The mechanism of action involves binding to REV-ERB receptors and recruiting corepressor complexes, which represses target gene transcription. This contrasts with many nuclear receptor agonists that activate transcription. Downstream effects may include changes in autophagy, mitochondrial biogenesis, and lipid handling, but the precise pathways remain an active area of study. Whether these molecular events translate into meaningful physiological effects in humans is unresolved. Most evidence comes from cultured cells and rodent models rather than human participants.
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.
Quality control for research materials includes identity confirmation by nuclear magnetic resonance and purity assessment by high-performance liquid chromatography. Mass spectrometry provides molecular weight confirmation and can detect related impurities. Purchasers should request a certificate of analysis that lists lot-specific data. Online products advertised for human use often lack such documentation. Distinguishing legitimate research material from mislabeled or contaminated samples is a recurring challenge in independent testing, and independent laboratories may use orthogonal methods to verify identity.
Detection of SR9009 in biological samples usually relies on liquid chromatography coupled to tandem mass spectrometry. This approach separates the compound from matrix components and identifies it by mass transitions. Because SR9009 can undergo metabolism, laboratories often look for both parent drug and specific metabolites. Sample preparation may involve protein precipitation or solid-phase extraction. Method validation examines sensitivity, carryover, and interference from related substances, and reference standards are required for accurate calibration.
As a chemist he is known best for his work on organic synthesis, including discovery of the aldol reaction Hans-Joachim Born (1909–1987), German radiochemist who participated in the Soviet nuclear weapons programme Carl Bosch (1872–1940), German chemist, pioneer in the field of high-pressure industrial chemistry. Nobel Prize in Chemistry 1931 Octave Leopold Boudouard (1872–1923), French chemist who discovered the Boudouard reaction: combination of carbon and carbon dioxide to form carbon monoxide at high temperatures Jean-Baptiste Boussingault (1802–1887), French chemist with work in agricultural science, petroleum science and metallurgy
In humans, adipose tissue is located beneath the skin (subcutaneous fat), around internal organs (visceral fat), in bone marrow (yellow bone marrow), intermuscular (muscular system), and in the breast (breast tissue). Adipose tissue is found in specific locations, which are referred to as adipose depots. In addition to adipocytes, which comprise the highest percentage of cells within adipose tissue, other cell types are present, collectively termed stromal vascular fraction (SVF) of cells. SVF includes preadipocytes, fibroblasts, adipose tissue macrophages, and endothelial cells. Adipose tissue contains many small blood vessels. In the integumentary system, which includes the skin, it accumulates in the deepest level, the subcutaneous layer, providing insulation from heat and cold. Around organs, it provides protective padding. However, its main function is to be a reserve of lipids, which can be oxidised to meet the energy needs of the body and to protect it from excess glucose by storing triglycerides produced by the liver from sugars, although some evidence suggests that most lipid synthesis from carbohydrates occurs in the adipose tissue itself. Adipose depots in different parts of the body have different biochemical profiles. Under normal conditions, it provides feedback for hunger and diet to the brain.
=== Food science === Microfluidic techniques such as droplet microfluidics, paper microfluidics, and lab-on-a-chip are used in the realm of food science in a variety of categories. Research in nutrition, food processing, and food safety benefit from microfluidic technique because experiments can be done with less reagents. Food processing requires the ability to enable shelf stability in foods, such as emulsions or additions of preservatives. Techniques such as droplet microfluidics are used to create emulsions that are more controlled and complex than those created by traditional homogenization due to the precision of droplets that is achievable. Using microfluidics for emulsions is also more energy efficient compared to homogenization in which "only 5% of the supplied energy is used to generate the emulsion, with the rest dissipated as heat" . Although these methods have benefits, they currently lack the ability to be produced at large scale that is needed for commercialization. Microfluidics are also used in research as they allow for innovation in food chemistry and food processing. An example in food engineering research is a novel micro-3D-printed device fabricated to research production of droplets for potential food processing industry use, particularly in work with enhancing emulsions. Paper and droplet microfluidics allow for devices that can detect small amounts of unwanted bacteria or chemicals, making them useful in food safety and analysis.
Under Xi, China's official military budget has more than doubled, reaching a record $282 billion in 2026. Though predating Xi, his administration has taken a more assertive stance towards maritime affairs, and has boosted CCP control over the maritime security forces. The PLA Navy has grown rapidly under Xi, with China adding more warships, submarines, support ships and major amphibious vessels from 2014 to 2019 than the entire number of ships serving in the United Kingdom's fleet. Aircraft carriers Shandong and Fujian entered into service under Xi in 2019 and 2025 respectively. In 2017, China established the navy's first overseas base in Djibouti. Xi has also undertaken an expansion of China's nuclear arsenal, with him calling China to "establish a strong system of strategic deterrence." The Federation of American Scientists (FAS) has estimated China's total nuclear arsenal to be 600 in 2025, with the US Department of Defense estimating that China's arsenal could reach 1,000 by 2030.
== Terminology structure == Each NPU entry holds a structured definition of the 'result type' it identifies. The definitions are expressed using well established concepts and terms from the field of laboratory medicine. References to internationally acknowledged classifications, nomenclatures and terminologies are filed where possible. This ensures that the definitions are unambiguous, and that the meaning of each concept will remain stable and accessible over time. The definition structure is based on the scientific concept of 'examination' – an examination studies one or more properties of a system (a delimited part of the universe). In a clinical laboratory terminology such as the NPU terminology the system of interest is assumed to be (part of) the patient or the environment, and the NPU definition structure states:
Sources: en.wikipedia.org
An intein is a "parasitic" segment of a protein that is able to excise itself from the chain of amino acids as they emerge from the ribosome and rejoin the remaining portions with a peptide bond in such a manner that the main protein "backbone" does not fall apart. This is a case of a protein changing its own primary sequence from the sequence originally encoded by the DNA of a gene. Additionally, most inteins contain a homing endonuclease or HEG domain, which is capable of finding a copy of the parent gene that does not include the intein nucleotide sequence. On contact with the intein-free copy, the HEG domain initiates the DNA double-stranded break repair mechanism. This process causes the intein sequence to be copied from the original source gene to the intein-free gene. This is an example of protein directly editing DNA sequence, as well as increasing the sequence's heritable propagation.
Vilazodone, sold under the brand name Viibryd among others, is a medication used to treat major depressive disorder. It is classified as a serotonin modulator and is taken by mouth. Its common side effects include nausea, diarrhea, and trouble sleeping. Serious side effects may include increased suicidal thoughts or actions in those under the age of 25, serotonin syndrome, bleeding, activation of mania or hypomania, pancreatitis, seizures, angle-closure glaucoma, sleep paralysis, and sexual dysfunction. Vilazodone may cause a syndrome of inappropriate antidiuretic hormone secretion (SIADH). A withdrawal syndrome may occur if the dose is rapidly decreased. Use during pregnancy and breastfeeding is not generally recommended. It is in the serotonin modulator class of medications and is believed to work both as a selective serotonin reuptake inhibitor (SSRI) and activator of the 5-HT1A receptor. Vilazodone was approved for medical use in the United States in 2011 and in Canada in 2018. In 2019, it was the 334th most commonly prescribed medication in the United States, with more than 900 thousand prescriptions. The drug lost patent protection in June 2022 for adults and in July 2023 for pediatrics. Generic versions have been approved by the US Food and Drug Administration.
=== Thailand === Thailand has been severely impacted by the crisis. Thailand imports 57% of its oil from the Middle East, which requires to pass the Strait of Hormuz. The diesel fuel price has increased from 29.94 THB per litre in February, up to peak price of 50.54 THB per litre in 7 April. The government froze diesel prices at 29.94 THB per litre in the first 15 days of the crisis, and has directed people to raise their air-conditioning temperatures and reduce their outer clothing, to reduce energy consumption, and employees of all government agencies are working from home. Phipat Ratchakitprakarn, Deputy Prime Minister of Thailand and co-owner of PTG Energy (branded as PT), one of the largest oil companies in Thailand, was assigned by Anutin Charnvirakul, Prime Minister of Thailand to control and mitigate the impact of fuel crisis in Thailand. He has been criticised by Thai citizens for his failure to manage the impact, and the "Ban PT" movement has gained traction across the internet. In Pathum Thani Province, north of Bangkok, the local Provincial Administrative Organization (PAO) has terminated its 4.45 satang per litre (Equivalent to 0.445 THB) fuel dispenser tax for 3 months, in 317 stations across the province. Normally, this tax generates 4 million THB per month for the PAO. By this measure the PAO hopes to reduce fuel costs for the residents of Pathum Thani Province, especially for farmers.
All high schools operate on an alternating A/B-day block scheduling system, where one group of classes are taken on "A-Days" and a different group of classes are taken on "B-Days," and the cycle repeats. Most high schools have between three and four lunch shifts, depending on enrollment and eating accommodations. The only exceptions are Eleanor Roosevelt High School — which has adopted a modified hybrid block schedule in which both traditional single period courses and double period (block schedule) courses are integrated — and the Academy of Health Science at Prince George's Community College.
Sources: en.wikipedia.org
=== Licensing status === The Orion Corporation originally developed levosimendan and applied for a new drug application in 1998 in the U.S. However the Food and Drug Administration (FDA) requested further trials be conducted and Orion withdrew the application in November 1999. Initially, Orion obtained the approval to market the drug in Sweden in 2000. Since then 60 countries worldwide have approved the drug for acute cardiac care, but it remains unapproved in North America, where it is currently in Phase III development by Tenax Therapeutics for reduction in morbidity in patients with Pulmonary Hypertension derived from Heart Failure with preserved Ejection Faction (PH-HFpEF).
=== Receptors for water-soluble hormones === Water-soluble hormones include glycoproteins, catecholamines, and peptide hormones composed of polypeptides, e.g. thyroid-stimulating hormone, follicle-stimulating hormone, luteinizing hormone and insulin. These molecules are not lipid-soluble and therefore cannot diffuse through cell membranes. Consequently, receptors for peptide hormones are located on the plasma membrane because they have bound to a receptor protein located on the plasma membrane. Water-soluble hormones come from amino acids and are located and stored in endocrine cells until actually needed. The main two types of transmembrane receptor hormone receptor are the G-protein-coupled receptors and the enzyme-linked receptors. These receptors generally function via intracellular second messengers, including cyclic AMP (cAMP), cyclic GMP (cGMP), inositol 1,4,5-trisphosphate (IP3) and the calcium (Ca2+)-calmodulin system.
=== Section Praegnans === Cyclopia alopecuroides A.L. Schutte Cyclopia aurescens Kies Cyclopia bolusii Hofmeyr & E. Phillips Cyclopia bowieana Harv. Cyclopia glabra (Hofmeyr & E. Phillips) A.L. Schutte Cyclopia meyeriana Walp.
Bitcoin (abbreviation: BTC; sign: ₿) is the first decentralized cryptocurrency. Based on a free-market ideology, bitcoin was invented in 2008 when an unknown person published a white paper under the pseudonym of Satoshi Nakamoto. Use of bitcoin as a currency began in 2009, with the release of its open-source implementation. From 2021 to 2025, El Salvador adopted it as legal tender currency before revoking it. As bitcoin is pseudonymous, its use by criminals has attracted the attention of regulators, leading to its ban by several countries. Bitcoin works through the collaboration of computers, each of which acts as a node in the peer-to-peer bitcoin network. Each node maintains an independent copy of a public distributed ledger of transactions, called a blockchain, without central oversight. Transactions are validated through the use of cryptography, preventing one person from spending another person's bitcoin, as long as the owner of the bitcoin keeps certain sensitive data secret. Consensus between nodes about the content of the blockchain is achieved using a computationally intensive process based on proof of work, called mining, which is performed by purpose-built computers. Mining consumes large quantities of electricity, with surveyed miners reporting that 52% of their electricity use came from sustainable energy sources, and has been criticized for its environmental impact.
Harry Emerson. For services to the community in Stockton-on-Tees, Cleveland. Elizabeth Margaret Evans. For services to the community, particularly Disabled People, in Llanelli, Dyfed. Shirley Everett, Newsvendor. For services to the community in Westminster, London. Doris Mabel Eves. For services to the Citizens' Advice Bureau in Farnborough, Hampshire. George Fitton Exley, Honorary Secretary, Scarborough Lifeboat Station. For services to the Royal National Lifeboat Institution. Ellen Branker Farmer, President, Old Paisley Society. For services to Conservation. Margaret Winifred Farmer. For services to the Royal British Legion in Sevenoaks, Kent. Eric Arnold Faux. For services to disabled people in Birmingham Valerie Ann Fea, lately Executive Secretary, the School Library Association. For services to Librananship and to Young People. Heather Duncan Findlay, Local Officer 2, the Benefits Agency, Department of Social Security. Nina Mary Fineron, lately Typist, Department of Social Security. Isabel H. Finlay, lately Chiropodist, Glasgow. For services to Health Care. Millar Henry Finlay, Divisional Officer, (Special Constabulary), Flintshire Division, North Wales Police. For services to the Police. Olwen Finlay. For services to Physiotherapy. Evelyn May Fisher. For services to Netball in Coventry. Myra Caroline Fisher. For services to the community in Paulsgrove, Portsmouth, Hampshire. Bernard Joseph Fitzsimmons. For public service. Michael Robert Flegg, Catering Manager, Nottingham City Hospital. For services to Health Care. Iris Mary Fletcher.
Sources: en.wikipedia.org
Research-grade SR9009 is typically stored frozen at about minus twenty degrees Celsius, protected from light and moisture. Stock solutions are often kept in aliquots to avoid repeated freeze-thaw cycles. Specific storage conditions should follow the supplier's documentation.
Liquid chromatography with tandem mass spectrometry is widely used to detect and confirm SR9009 in laboratory samples. The technique offers high sensitivity and can distinguish the target compound from related substances. Nuclear magnetic resonance and ultraviolet detection may support identity and purity checks.
Online products labeled as SR9009 may vary in identity, purity, and actual content. Independent testing helps confirm that a sample matches its label and does not contain unexpected contaminants. This is important for reproducible research and for interpreting experimental results.
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.