LC-MS/MS comes up often in conversation and rarely with the context attached. Here we lay out the basics in order, then work through the practical considerations.
Updated 2026-03-25. Numbers and descriptions here follow the published literature rather than marketing material.
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.
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.
| 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 |
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.
Scottish economist Adam Smith stated that free labour was economically better than slave labour, and that it was nearly impossible to end slavery in a free, democratic, or republican form of government since many of its legislators or political figures were slave owners and would not punish themselves. He further stated that slaves would be better able to gain their freedom under centralized government, or a central authority like a king or church. Similar arguments appeared later in the works of Auguste Comte, especially given Smith's belief in the separation of powers, or what Comte called the "separation of the spiritual and the temporal" during the Middle Ages and the end of slavery, and Smith's criticism of masters, past and present. As Smith stated in the Lectures on Jurisprudence, "The great power of the clergy thus concurring with that of the king set the slaves at liberty. But it was absolutely necessary both that the authority of the king and of the clergy should be great. Where ever any one of these was wanting, slavery still continues..."
Sick benefits were administered by the subordinate lodges. In 1899 it was limited to the United States and had 3,000 men and 2,500 women members. The orders seal was a spread eagle with a shield holding an American flag and the words "Liberty, Equality, Fraternity" emblazoned on it. Independent Order of B'nai B'rith Independent Order of B'rith Sholom - Founded in 1905 to assist Jewish immigrants to the US. As Jewish immigration increased, it became more of a human rights organization. Membership open to Jews and gentiles over 16. Female auxiliary named B'rith Sholom Women. Had 52,596 members in 1917. Had 20,000 members in 1979. 6,000 members in 1988. Headquarters in 1917 was at 510-512 5th Street, Philadelphia. Headquarters still at Philadelphia in 1979, when the order had 130 lodges and three statewide organizations. They had a secret ritual, but it was only used by a few lodges. Offers scholarships. Did not have an insurance fund, per se, but offered death and burial benefits and financial aid when members were in need; also taught English language and Americanization. The group saved 50 children aged 5 to 14 during the Holocaust; these were housed at a Camp Sholom. Operates a retirement home in Philadelphia that housed 500. Sponsors Albert Einstein College of Medicine at Yeshiva University and a recuperation center for Israeli soldiers in Haifa. Contributed a 65-acre (26 ha) tract of land for Eagleville Sanatorium.
Photograph 1. – Open rhinoplasty: The incisions are endonasal (in the nose), and thus are hidden. The skin-incision to the columella aids the plastic surgeon in precisely suturing to hide the scar—except for the columellar incision (red-dot guideline) across the nasal base. The columellar incision allows the surgeon to view the size, shape, and condition of the nasal cartilages and bones to be corrected. Photograph 2. – Open rhinoplasty: The nasal interior. The scissors indicate the lower lateral cartilage (blue), which is one of the wing-shaped cartilages that conform the tip of the nose. The jagged red delineation indicates the locale of the columellar incision. Once the skin has been lifted from the bone-and-cartilage framework, the surgeon performs the nasal correction tasks. Photograph 3. – Open rhinoplasty: To narrow the tip of a too-wide nose, the surgeon first determines the cause of the excess nasal width. The suture being emplaced will narrow the tip of the nose. The red delineation indicates the edge of the nose-tip cartilage, which is narrowed when the surgeon tightens the folded cartilage apex. The suture (light blue) ends in the needle (white); tweezers (green) hold the nasal cartilage in place for the suturing. Photograph 4. – Nasal hump excision: The black delineation indicates the desired nose-reduction outcome: a straight nose. The nasal hump is bone (red) above the scalloped grey line, and cartilage (blue) below the scalloped grey line.
By March 2002, the Yorkshire-Tricon multi-branding test consisted of 83 KFC/A&Ws, six KFC/Long John Silver's, and three Taco Bell/Long John Silver's and was considered successful by the companies. In December 2000, A&W announced new openings in less conventional locations, such as casinos, airports, gas stations, convention centers and convenience stores, for 2001, as part of its growth plans. At the time, the chain had more than 1,000 locations in 47 states and over 200 international locations in 14 countries. The chain around the time emphasized its aesthetics on "contemporized nostalgia". It also saw a success in co-branded restaurants, following the success of a trial in Butte in 1998, which, owing to its success, in the spring of 2000 led to the announcement of the opening of 300 joint KFC-A&W restaurants by 2005. Tricon bought both A&W and LJS in March 2002, shortly before the merger with Yorkshire was finalized.
Historically, the birth rate of teenagers peaked in the late 1950s and early 1960s. However, at that time, most teenage parents were married. In the early twenty-first century, nine in ten births to the age group 15-19 are to unmarried mothers. Social norms have changed; it is now not unusual for teenagers to delay or avoid sexual intercourse altogether. Younger teenagers are more likely to practice abstinence than their older counterparts. A report published by the Center for Disease Control and Prevention (CDC) in early 2018 found the number of high school students who have had sex fell from 47% in 2005 down to 41% in 2015, with the most dramatic drop taking place between 2013 and 2015. On top of that, among never-married teens who have had sex, overwhelming majorities reported they used contraception the first time they did it. There are a few reasons for this. First, Millennials and Generation Z are more focused on the consequences of sex than their predecessors were. Second, there has been growing concern over unwanted sexual advances, especially in the wake of the Me-too movement. Writing for The Spectator, Douglas Murray dubbed this the "sexual counter-revolution." Third, as a consequence of the precarious contemporary economy, young adults today are more likely to be living with their parents rather than on their own, with a romantic partner, or a spouse. A 2016 analysis by the CDC discovered that teenage birthrates nosedived between 1991, when they reached a crisis point, and 2014, when they dropped by 60%, a record low.
Sources: en.wikipedia.org
The radiological evaluation through HRCT is an essential point in the diagnostic pathway in IPF. HRCT is performed using a conventional computed axial tomographic scanner without injection of contrast agents. Evaluation slices are very thin, 1–2 mm (0.039–0.079 in). Typical HRCT of the chest of IPF demonstrates fibrotic changes in both lungs, with a predilection for the bases and the periphery. According to the joint ATS/ERS/JRS/ALAT 2011 guidelines, HRCT is an essential component of the diagnostic pathway in IPF which can identify UIP by the presence of:
The enzyme was first found by Detlev Müller in 1933. The first-ever isolated alcohol dehydrogenase (ADH) was purified in 1937 from Saccharomyces cerevisiae (brewer's yeast). Many aspects of the catalytic mechanism for the horse liver ADH enzyme were investigated by Hugo Theorell and coworkers. ADH was also one of the first oligomeric enzymes that had its amino acid sequence and three-dimensional structure determined. In early 1960, the alcohol dehydrogenase (ADH) gene was discovered in fruit flies of the genus Drosophila melanogaster. Flies that are mutant for ADH cannot breakdown alcohols into aldehydes and ketones. While ethanol produced by decaying fruit is a natural food source and location for oviposit for Drosophila at low concentrations (<4%), high concentrations of ethanol can induce oxidative stress and alcohol intoxication. Drosophila's fitness is elevated by consuming the low concentration of ethanol. Initial exposure to ethanol causes hyperactivity, followed by incoordination and sedation. Further research has shown that the antioxidant alpha-ketoglutarate may be beneficial in reducing the oxidative stress produced by alcohol consumption. A 2016 study concluded that food supplementation with 10-mM alpha-ketoglutarate decreased Drosophila alcohol sensitivity over time. For the gene that codes for ADH, there are 194 known classic and insertion alleles. Two alleles that are commonly used for experimentation involving ethanol toxicity and response are ADHs (slow) and ADHF (fast).
Somali cuisine is a mixture of various culinary influences that is derived from Arab, Indian, and Italian flavours as a direct result of Somalia's extensive history of trade and commerce. Examples of Somali dishes include staples like rice and pasta, along with meats such as lamb, beef, and chicken. Aromatic spices such as cumin, cardamom, and coriander are often used to give distinct flavours to dishes. Alongside stews, traditional flatbreads, and pastries, another Somali dish is the "Canjeero/Lahooh", a variation of fermented pancake-like flatbread that is savoured in Somalia and in neighbouring countries like Ethiopia, Eritrea, and Yemen. Additionally, camel meat and milk are considered a delicacy. Somali rice, the usual staple for dinner or lunch, is typically seasoned and mixed with various ingredients such as meat, vegetables, and, in a somewhat unique manner, raisins. It is not uncommon for this dish to be presented in a visually appealing manner by incorporating multiple colours, as certain portions may be artificially tinted with shades of yellow or orange using saffron and other spices to enhance its aesthetic appeal.
In 2004, the Council decided to allow flavored tequila to be called tequila, with the exception of 100% agave tequila, which still cannot be flavored. A new Norma Oficial Mexicana (NOM) for tequila (NOM-006-SCFI-2005) was issued in 2006 and, among other changes, introduced a class of tequila called extra añejo or "ultra-aged", which must be aged a minimum of three years. A one-liter bottle of limited-edition premium tequila was sold for $225,000 in July 2006 in Tequila, Jalisco, by the company Tequila Ley .925. The bottle that contained the tequila was a two-kilo display of platinum and gold. The manufacturer received a certificate from The Guinness World Records for the most expensive bottle of tequila spirit ever sold. In June 2013, a Chinese ban on the importation of premium (100% blue agave) tequila into China was lifted, following a state visit to Mexico by Chinese Communist Party general secretary Xi Jinping. The entry of premium tequila into the country was expected to increase tequila exports by 20 percent within the decade above the 170 million liters in 2013. Ramon Gonzalez, director of the Consejo Regulador del Tequila, estimates that each of the top 16 producers of tequila had invested up to $3 million to enter the Chinese market. On 30 August 2013, the first 70,380 bottles of premium tequila from ten brands arrived in Shanghai. The arrival happened during an event held at the House of Roosevelt, a well-known club located on The Bund – an area with a long tradition of importing alcoholic beverages in China.
==== High levels in saliva and capillary blood ==== On the basis of the very low levels of progesterone observed in venous blood with transdermal progesterone, some researchers have concluded that transdermal progesterone is not well-absorbed and will not allow for adequate endometrial protection. However, in spite of very low levels of progesterone in circulation, studies that have measured levels of progesterone in saliva and/or capillary blood with transdermal progesterone have found that they are dramatically elevated and in fact greatly supraphysiological. In one study that used an oil-based cream or water-based gel, salivary and fingertip capillary blood levels of progesterone were found to be approximately 10-fold and 100-fold greater than venous blood levels, respectively. The exact levels of progesterone were 4 to 12 ng/mL in saliva and 62 to 96 ng/mL in capillary blood; the reference ranges of progesterone in saliva and capillary blood from a cited laboratory were 0.75 to 2.5 ng/mL and 3.3 to 22.5 ng/mL for premenopausal women in the luteal phase and 0.12 to 1.0 ng/mL and 0.1 to 0.8 ng/mL in postmenopausal women, respectively. As such, these data confirm distribution of progesterone to at least certain tissues with transdermal progesterone in spite of very low levels of progesterone in circulation and indicate that progesterone levels in venous blood cannot necessarily be used as an index of tissue exposure to progesterone with this route of administration.
Sources: en.wikipedia.org
=== 25 April === At least 11 people were killed in an RSF drone strike in Atbara that hit a displaced persons camp and energy facilities. RSF shelling from Salha in Omdurman hit the SAF's general headquarters in Khartoum.
A clinical evaluation of Prontosan wound cleanser was undertaken with ten community care patients where saline had been used for at least one month previously on wounds that had a mean duration of 2.6 years. The findings include; an overall reduction in wound size, a reduction in malodour, reduction or elimination of wound pain. These results correlate well with the patients' reports of improvement in quality of life and a reduction in the number of nursing visits. In addition, the wound cleansing effects of Prontosan with achieving a visible wound bed was reported by the author and linked to the removal of wound biofilm. Although this association is speculative it does appear to correspond with the other reported improvements found in these wounds.
Smitty's Family Restaurants opened their first location in 1960 and now operates 82 restaurants across Canada. Smitty's was one of the first ever franchise model restaurants in the country. Smitty's Restaurants are family owned and operated, and are known for their all day breakfast, lunch and dinner offerings. Their taglines of "All Your Favourites. All Day Long." and "Canada's Family Restaurant" are represented in a vast menu of choices for every age.
When cultivated for human consumption in Western nations, insects are held to the same safety requirements as any other food. Depending on the popularity in a given location, processing might be done commercially or locally. The procedure begins with the removal of the insect's insides, albeit this step is optional. They are then dispatched to be preserved or freeze-dried, which is accomplished using hessian or polypropylene. They are transported for storage once they have been entirely preserved/dried. Insects can be frozen or ground into powders. Cricket flour is produced from freeze-dried crickets. The crickets are then cooked to facilitate processing. They are pulverized into extremely fine bits after being cooked. The freezing, baking, and drying results in a powdered dark brown flour. Insect flour is one of Whole Foods Market's banned ingredients in the U.S., with cricket flour being specifically mentioned on their paper bags.
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 research compound that activates the REV-ERBα and REV-ERBβ nuclear receptors. It is not an approved drug and has no established human therapeutic use. Most published biological data come from cell and rodent studies.