Everything below concerns REV-ERB. We keep the language plain, cite what the science says, and separate well-supported claims from open questions.
Updated 2025-11-19. Numbers and descriptions here follow the published literature rather than marketing material.
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.
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.
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.
Analytical identification of SR9009 typically relies on liquid chromatography coupled with tandem mass spectrometry. In biological samples, researchers first separate the compound from matrix components using protein precipitation, liquid-liquid extraction, or solid-phase extraction. High-performance liquid chromatography with ultraviolet detection and nuclear magnetic resonance spectroscopy can support structural confirmation of reference materials. Because SR9009 is a small, relatively lipophilic molecule, reverse-phase columns and acidic mobile phases are common. Laboratories often include isotope-labeled internal standards to improve quantification and to correct for ion suppression.
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.
| 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 |
Laboratory studies often administer SR9009 by injection because oral absorption appears poor in rodents. Reported pharmacokinetic properties include rapid metabolism and low systemic exposure after oral dosing. Human pharmacokinetic data are sparse, so absorption, distribution, metabolism, and excretion in people are not well defined. Some research explores related REV-ERB compounds with improved drug-like properties. Regulatory approval for any REV-ERB agonist as a human medicine has not been granted to date.
SR9009 is a synthetic small molecule studied as an agonist of the nuclear receptors REV-ERBα and REV-ERBβ, also called NR1D1 and NR1D2. These receptors help regulate circadian rhythms and metabolic gene programs. The compound was developed for laboratory research, not as an approved therapeutic. Its identity is distinct from steroid hormones and selective androgen receptor modulators. Scientific interest centers on how REV-ERB activation changes gene expression in cells and animal models.
Nicotine blue oxidoreductase (EC 1.1.1.328, nboR (gene)) is an enzyme with systematic name 3,3'-bipyridine-2,2',5,5',6,6'-hexol:NADP+ 11-oxidoreductase. This enzyme catalyses the following chemical reaction
Plasma membranes also contain carbohydrates, predominantly glycoproteins, but with some glycolipids (cerebrosides and gangliosides). Carbohydrates are important in the role of cell-cell recognition in eukaryotes; they are located on the surface of the cell where they recognize host cells and share information. Viruses that bind to cells using these receptors cause an infection. For the most part, no glycosylation occurs on membranes within the cell; rather generally glycosylation occurs on the extracellular surface of the plasma membrane. The glycocalyx is an important feature in all cells, especially epithelia with microvilli. Recent data suggest the glycocalyx participates in cell adhesion, lymphocyte homing, and many others. The penultimate sugar is galactose and the terminal sugar is sialic acid, as the sugar backbone is modified in the Golgi apparatus. Sialic acid carries a negative charge, providing an external barrier to charged particles.
It is a cyclin dependent kinase containing the catalytic subunit, Cdk9, and a regulatory subunit, cyclin T in Drosophila. In humans there are multiple forms of P-TEFb which contain Cdk9 and one of several cyclin subunits, cyclin T1, T2, and K. P-TEFb associates with other factors including the bromodomain protein BRD4, and is found associated with a large complex of proteins called the super elongation complex. Importantly, for the AIDS virus, HIV, P-TEFb is targeted by the HIV Tat protein which bypasses normal cellular P-TEFb control and directly brings P-TEFb to the promoter proximal paused polymerase in the HIV genome.
Many calcium compounds are used in food, as pharmaceuticals, and in medicine, among others. For example, calcium and phosphorus are supplemented in foods through the addition of calcium lactate, calcium diphosphate, and tricalcium phosphate. The last is also used as a polishing agent in toothpaste and in antacids. Calcium lactobionate is a white powder that is used as a suspending agent for pharmaceuticals. In baking, calcium phosphate is used as a leavening agent. Calcium sulfite is used as a bleach in papermaking and as a disinfectant, calcium silicate is used as a reinforcing agent in rubber, and calcium acetate is a component of liming rosin and is used to make metallic soaps and synthetic resins. Calcium supplement is on the World Health Organization's List of Essential Medicines.
Empagliflozin/linagliptin/metformin, sold under the brand name Trijardy XR, is a fixed-dose combination medication used for the treatment of type 2 diabetes. It is a combination of empagliflozin, linagliptin, and metformin. Empagliflozin/linagliptin/metformin was approved for use in the United States in January 2020.
Sources: en.wikipedia.org
British Foreign Secretary, David Miliband wrote on 19 August 2008: "In the first week of August South Ossetian provocation prompted a Georgian military response. This then provided a pretext for overwhelming Russian aggression in and beyond the borders of South Ossetia." According to Bruce P. Jackson, a close Bush administration ally, at a conference in Dubrovnik around July 4, Daniel Fried from the State Department warned Saakashvili not to engage Russian forces because nobody would help him. A senior American official said that after 19:00 on 7 August, Georgian president Saakashvili was contacted by Daniel Fried, who attempted to persuade Saakashvili that the South Ossetian attacks were a trap set by Russia. United States Secretary of Defense Robert Gates commented on his contact with his Russian counterpart on 8 August, "I will tell you that Minister Serdyukov told me that the Russians have no intention of going into Georgia." One anonymous European diplomat in Tbilisi told Los Angeles Times that "Everyone was expecting that something would happen because of Saakashvili's Western ways." Diplomat said that after the bombing of Ossetian official and an attempt to assassinate pro-Georgian South Ossetia's leader, "everything started to snowball". A ranking European diplomat said that the Russian invasion was "of course not an improvisation.
=== Sources for human stem cells === Most stem cells intended for regenerative therapy are generally isolated either from the patient's bone marrow or from adipose tissue. Mesenchymal stem cells can differentiate into the cells that make up bone, cartilage, tendons, and ligaments, as well as muscle, neural and other progenitor tissues. They have been the main type of stem cells studied in the treatment of diseases affecting these tissues. The number of stem cells transplanted into damaged tissue may alter the efficacy of treatment. Accordingly, stem cells derived from bone marrow aspirates, for instance, are cultured in specialized laboratories for expansion to millions of cells. Although adipose-derived tissue also requires processing prior to use, the culturing methodology for adipose-derived stem cells is not as extensive as that for bone marrow-derived cells. While it is thought that bone-marrow-derived stem cells are preferred for bone, cartilage, ligament, and tendon repair, others believe that the less challenging collection techniques and the multi-cellular microenvironment already present in adipose-derived stem cell fractions make the latter the preferred source for autologous transplantation. New sources of mesenchymal stem cells are being researched, including stem cells present in the skin and dermis which are of interest because of the ease at which they can be harvested with minimal risk to the animal.
Promoting the rapid exchange of information during food safety events; Sharing information on important food safety issues of global interest; Promoting partnership and collaboration between countries; and Helping countries strengthen their capacity to manage food safety risks. Membership to INFOSAN is voluntary, but is restricted to representatives from national and regional government authorities and requires an official letter of designation. INFOSAN seeks to reflect the multidisciplinary nature of food safety and promote intersectoral collaboration by requesting the designation of Focal Points in each of the respective national authorities with a stake in food safety, and a single Emergency Contact Point in the national authority with the responsibility for coordinating national food safety emergencies; countries choosing to be members of INFOSAN are committed to sharing information between their respective food safety authorities and other INFOSAN members. The operational definition of a food safety authority includes those authorities involved in: food policy; risk assessment; food control and management; food inspection services; foodborne disease surveillance and response; laboratory services for monitoring and surveillance of foods and foodborne diseases; and food safety information, education and communication across the farm-to-table continuum.
==== Static vs. dynamic freezing profiles ==== If a freeze casting setup with a constant temperature on either side of the freezing system is used, (static freeze-casting) the front solidification velocity in the SSZ will decrease over time due to the increasing thermal buffer caused by the growing ice front. When this occurs, more time is given for the anisotropic ice crystals to grow perpendicularly to the freezing direction (c-axis) resulting in a structure with ice lamellae that increase in thickness along the length of the sample.
== June 7, 1915 (Monday) == Battle of Hébuterne — The French 2nd Army attacked German positions around Hébuterne, France to support the 10th Army efforts further north at Artois. French troops were able to overrun the first two German lines during the opening day. The Dardanelles Committee met in London decided to reinforce the Mediterranean Expeditionary Force of General Ian Hamilton with three divisions from Kitchener's Army in an attempt to reinvigorate the Gallipoli campaign. The first German Army Zeppelin airship was destroyed in air-to-air combat by British pilot Reginald Warneford of No. 1 Squadron over Ghent, Belgium. The airship crashed in Sint-Amandsberg, Belgium, killing one person on the ground and all but one of the crew. Warneford received the Victoria Cross for the action. The LZ 38, the first Zeppelin P Class airship of the Imperial German Army, was destroyed when British planes bombed the shed it was housed in near Evere, Belgium. The first airship flew out of Friedrichshafen-Löwental airfield near Friedrichshafen, Germany. Born: Dominic Bruce, British air force officer, member of the No. 9 and No. 214 Squadrons during World War II, noted escapee from German POW camp Oflag IV-C at Colditz Castle, recipient of the Order of the British Empire, Order of St. Gregory the Great, Military Cross, and Air Force Medal; in Hebburn, England (d. 2000) Graham Ingels, American comic book artist, best known for his work for EC Comics; in Cincinnati, United States (d.
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.
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.