A practical reference on freeze-thaw cycle: what it is, how it behaves, what the literature reports, and where the honest uncertainties sit.
This page was last updated on 2026-08-01 and is reviewed periodically as new material appears.
Research interest in SR9009 grew from studies showing improved running endurance in mice after short treatment periods. Those experiments linked the compound to increased mitochondrial content and fatty acid oxidation in muscle, but the findings come from animal models and specific dosing schedules. Independent replication has been limited, and the pathways connecting REV-ERB activation to exercise performance are still being mapped. Whether similar responses occur in humans is an open question.
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.
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.
| Property | Value | Notes |
|---|---|---|
| Molecular formula | C20H24ClN3O4S | Reported for the free base |
| Molecular weight | 437.9 g/mol | Calculated from the formula |
| Primary target | REV-ERBα and REV-ERBβ | Nuclear receptors involved in circadian regulation |
| Solubility | Soluble in DMSO and ethanol | Poorly soluble in water |
| Typical storage | -20 °C, desiccated | Protect from light and moisture |
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.
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.
Storage recommendations for SR9009 reference material typically specify a freezer at -20 °C or lower, with protection from moisture and light. Repeated freeze-thaw cycles can degrade small molecules and introduce variability. Stock solutions in dimethyl sulfoxide are often aliquoted to avoid repeated handling. Stability studies may examine degradation under heat, humidity, and light exposure. The compound's thiophene and nitro groups can participate in reactions that alter analytical signals over time, so such changes affect quantitative results.
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.
Williams WJ, Litwin J, Thorne CB (1955). "Further studies on the biosynthesis of gamma-glutamyl peptides by transfer reactions". J. Biol. Chem. 212: 427–438. doi:10.1016/S0021-9258(18)71130-7. PMID 13233245.
Climate change is projected to raise average temperatures in Portugal by as much as 3–4 °C (37.4–39.2 °F) by 2100 relative to the 1990s–2010s average, with impacts in water, ecosystem, agriculture, health, and security.
Treatment for thalassemia depends on the severity of the disease. People with thalassemia traits (thalassemia minor or non transfusion dependent thalassemia), may not require medical or follow-up care after the initial diagnosis is made. Occasionally transfusions may be necessary particularly around childbirth, surgery, or if other conditions provoke anemia. A folic acid supplement may also be recommended. For those with severe forms of thalassemia (thalassemia major, or transfusion-dependent thalassemia), the three principal treatments are red blood cell transfusions to relieve anemia, iron chelation to mitigate the side effects of transfusion, and folic acid supplementation to encourage the growth of new blood cells. Other forms of treatment available depending on individual circumstances.
In March 2015, Markie Pasternak of Green Bay, Wisconsin, was diagnosed as the youngest person to be living with HSAM. Born in 1994, Pasternak remembers every day of her life since February 2005. She was featured on 60 Minutes Australia in August 2016 with Rebecca Sharrock. In January 2016, painter and polymath Nima Veiseh was featured by the BBC for his use of hyperthymesia to create paintings that were said to only be producible with vast memories of art pieces, although a paper published in the journal Memory in 2022 claimed that having hyperthymesia does not increase one's creative thinking. Veiseh claimed to remember almost every day of his life since he was 15 years old, and that his ability to synthesise time and an "encyclopedic knowledge of the history of art" enabled him to create wholly unique visions on canvas. In March 2016 NPR examined further Veiseh's exploration of time and the human experience through art. In 2017, Australian Rebecca Sharrock of Brisbane became known as a person who claims to recall even circumstantial details of every day of her life from her 12th day of life onward. Discussing her hyperthymesia with BBC World Service, Sharrock revealed she was supporting two research projects – one with the University of Queensland and another with the University of California – to understand how a greater knowledge of hyperthymesia can support Alzheimer's disease research, particularly in repairing the degeneration of the hippocampus.
==== 1700–1799 ==== A249 Trunk Road (Brielle Way/Docks Entrance) Order 1993 (S.I. 1993/1700) Craigie College of Education (Closure) (Scotland) Order 1993 (S.I. 1993/1701) Supply of Razors and Razor Blades (Interim Provision) (Revocation) Order 1993 (S.I. 1993/1702) Merger Situation (Stora/Swedish Match/Gillette) (Interim Provision) (Revocation) Order 1993 (S.I. 1993/1703) Land Registration (Charities) Rules 1993 (S.I. 1993/1704) A65 Trunk Road (Gargrave Bypass) Order 1990 Amendment and New Trunk Road Order 1993 (S.I. 1993/1705) A65 Trunk Road (Horse Pasture Laithe to Heber Barn) (Detrunking) Order 1993 (S.I. 1993/1706) Removal and Disposal of Vehicles(Amendment) (No. 3) Regulations 1993 (S.I. 1993/1708) Inshore Fishing (Prohibition of Fishing for Cockles) (Scotland) Order 1993 (S.I. 1993/1709) Motor Vehicles (Designation of Approval Marks) (Amendment) Regulations 1993 (S.I. 1993/1710) Plant Breeders' Rights (Trees, Shrubs and Woody Climbers) (Variation) Scheme 1993 (S.I. 1993/1733) Beef Special Premium Regulations 1993 (S.I. 1993/1734) Reconstitution of the Upper Witham Internal Drainage Board Order 1993 (S.I. 1993/1738) Social Security (Introduction of Disability Living Allowance) (Amendment) (No.2) Regulations 1993 (S.I. 1993/1739) Kent and East Sussex (County Boundaries) Order 1993 (S.I. 1993/1742) Coal Industry (Restructuring Grants) Order 1993 (S.I. 1993/1745) Chemicals (Hazard Information and Packaging) Regulations 1993 (S.I. 1993/1746) A35 Trunk Road (Tolpuddle to Puddletown Bypass and Slip Roads) Order 1993 (S.I.
Sources: en.wikipedia.org
=== Osteoporosis === Vitamin K is required for the gamma-carboxylation of osteocalcin in bone. The risk of osteoporosis, assessed via bone mineral density and fractures, was not affected for people on warfarin therapy – a vitamin K antagonist. Studies investigating whether vitamin K supplementation reduces risk of bone fractures have shown mixed results.
One common division of Raleigh is to differentiate the central part of the city, which lies inside of the circumferential highway known as the Raleigh Beltline (I-440 and I-40) from areas outside of the Beltline. The area inside of the beltline includes the entirety of the central business district known as Downtown Raleigh, as well as several more residential areas surrounding it. The downtown area is home to historic buildings such as the Sir Walter Raleigh Hotel built in the early 20th century, the restored City Market, the Fayetteville Street downtown business district (which includes the PNC Plaza and Wells Fargo Capitol Center buildings), as well as the North Carolina Museum of History, North Carolina Museum of Natural Sciences, North Carolina State Capitol, William Peace University, the City of Raleigh Museum, Raleigh Convention Center, Shaw University, Campbell University School of Law, and St. Augustine's College. In the 2000s, an effort by the Downtown Raleigh Alliance was made to separate this area of the city into five smaller districts: Fayetteville Street, Moore Square, Glenwood South, Warehouse, and Capital District. The nearby Blount Street Historic District includes many of the city's historic Victorian, Georgian Revival, Queen Anne, and Second Empire mansions, including Norris-Heartt House, Andrews-Duncan House, Heck-Andrews House, Bailey-Tucker House, Capehart House, Bailey-Bunn House, and the Garland Scott and Toler Moore Tucker House (the latter was later moved from its original location to Oakwood).
Working with E. R. Giblett in 1972, Ammann described the first patient with purine nucleoside phosphorylase deficiency in association with a unique genetic profile that included depressed T-cell immunity with normal levels of immunoglobulins. The resulting publication was listed as one of the 500 most widely cited articles in 1984. Ammann's discovery represented an essential step to understanding new treatments for immunodeficiency diseases and developing drugs that could interfere with the immune response.
== Global statistics == As of 2014, there were 281 marketed orphan drugs and more than 400 orphan-designated drugs in clinical trials. More than 60% of orphan drugs were biologics. The U.S. dominated development of orphan drugs, with more than 300 trials, followed by Europe. Cancer treatment was the indication in more than 30% of orphan drug trials.
== ADME == A number of phases occur once the drug enters into contact with the organism, these are described using the acronym ADME (or LADME if liberation is included as a separate step from absorption):
Sources: en.wikipedia.org
== TCI Foundation == TCI Foundation, the social responsibility arm of Transport Corporation of India. The foundation is involved in initiatives related to health, education, women’s development, disability, and disaster relief.
Tempeh is 60% water, 20% protein, 8% carbohydrates, and 11% fats (table). In a reference amount of 100 grams (3.5 oz), tempeh supplies 192 calories, and is a rich source (20% or more of the Daily Value, DV) of several B vitamins and dietary minerals, such as riboflavin (30% DV) and manganese (62% DV), respectively (table).
== International Wagyu == International Wagyu is regulated and promoted through the World Wagyu Council. National Wagyu Day, also referred to as World Wagyu Day, is on June 21 to promote Wagyu by the World Wagyu Council. This day was founded in 2022 by Steve Haddadin and was adopted by the World Wagyu Council and British Wagyu Breeders Association as World Wagyu Day.
Glucose enters the β-cells through the glucose transporters, GLUT 2. At low blood sugar levels little glucose enters the β-cells; at high blood glucose concentrations large quantities of glucose enter these cells. The glucose that enters the β-cell is phosphorylated to glucose-6-phosphate (G-6-P) by glucokinase (hexokinase IV) which is not inhibited by G-6-P in the way that the hexokinases in other tissues (hexokinase I – III) are affected by this product. This means that the intracellular G-6-P concentration remains proportional to the blood sugar concentration. Glucose-6-phosphate enters glycolytic pathway and then, via the pyruvate dehydrogenase reaction, into the Krebs cycle, where multiple, high-energy ATP molecules are produced by the oxidation of acetyl CoA (the Krebs cycle substrate), leading to a rise in the ATP:ADP ratio within the cell. An increased intracellular ATP:ADP ratio closes the ATP-sensitive SUR1/Kir6.2 potassium channel (see sulfonylurea receptor). This prevents potassium ions (K+) from leaving the cell by facilitated diffusion, leading to a buildup of intracellular potassium ions. As a result, the inside of the cell becomes less negative with respect to the outside, leading to the depolarization of the cell surface membrane. Upon depolarization, voltage-gated calcium ion (Ca2+) channels open, allowing calcium ions to move into the cell by facilitated diffusion. The cytosolic calcium ion concentration can also be increased by calcium release from intracellular stores via activation of ryanodine receptors.
== Uses == Niosomes are used as biodegradable and non-immunogenic drug delivery compounds, as they have a low toxicity risk in biological systems. They can also be used to entrap hydrophilic pharmaceuticals within aqueous compartments or lipophilic drugs into vesicular bilayer membranes. Niosomes shield drug molecules from the biological environment, which can be utilized to improve the therapeutic performance of various drug molecules. Additionally, they can be used in a sustained drug delivery system to more directly affect target cells and delay clearance from circulation. Niosomes are used in a variety of applications, including gene delivery, drug targeting, antineoplastic treatment, delivery of peptide drugs, carriers for hemoglobin, transdermal drug delivery systems, and cosmetics. They are also being studied for their potential use as a treatment for different forms of leishmaniasis In one 2022 in vitro study, tamoxifen-loaded niosomes exhibited pH-dependent release and induced apoptosis and cell-cycle arrest in two breast cancer cell lines .
Sources: en.wikipedia.org
It is a synthetic REV-ERB agonist used mainly in preclinical research. It is not an approved medicine for human use.
It binds to REV-ERBα and REV-ERBβ, nuclear receptors involved in circadian and metabolic gene regulation. This can alter transcription of genes related to lipid and glucose metabolism in experimental models.
No controlled human trials have established that effect. Endurance findings come primarily from rodent studies, and human responses remain unknown.
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.