The short version of NR1D1 fits in a sentence. The long version — which is the one that helps — is below.
This page was last updated on 2025-08-05 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.
Preclinical reports describe effects on exercise endurance, mitochondrial content, and lipid profiles in rodents, but these findings come from specific experimental conditions. Many studies use high doses or delivery methods that may not translate directly to human use. SR9009 has been reported to have low oral bioavailability and a short half-life, which complicates interpretation of oral dosing studies. It is not established as safe or effective for any indication. Literature discussions often separate its pharmacological mechanism from unverified claims made in fitness and supplement markets.
SR9009 is a synthetic small molecule studied as an agonist of the nuclear receptors REV-ERBα and REV-ERBβ. It is not an approved medicine and has no established human therapeutic use. The compound appears in scientific literature as a tool for probing circadian and metabolic regulation. Online sellers often label it as a research chemical, sometimes using the nickname Stenabolic. Its chemical identity is distinct from selective androgen receptor modulators, stimulants, and peroxisome proliferator-activated receptor delta agonists. Researchers use it mainly in cell and animal experiments.
| 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 |
Handling practices for SR9009 focus on minimizing degradation and contamination. The solid is generally stored desiccated at or below -20 °C, protected from light and moisture. Stock solutions are often prepared in dimethyl sulfoxide or ethanol, then aliquoted to avoid repeated freeze–thaw cycles. Aqueous solubility is low, so formulations for animal studies may require cosolvents or suspending agents. Personnel should follow institutional chemical safety procedures, because toxicological data for humans are incomplete.
Regulatory status varies by country and intended use. Major drug agencies have not granted marketing authorization for SR9009 as a medicine, and it is not listed as a controlled substance in many jurisdictions. It is often sold as a research chemical, a category that may fall outside pharmaceutical manufacturing rules. Buyers should verify local laws and supplier documentation, including certificates of analysis. The lack of standardized quality controls raises concerns about identity, purity, and actual content in products marketed online.
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.
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.
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.
=== Cardiovascular system === Meta-analyses have reported a reduced risk of death from ischemic heart disease and from cerebrovascular disease among vegetarians. A 2023 systematic review and meta-analysis of prospective cohort studies found that vegetarian diets were associated with a reduced risk of cardiovascular disease overall and of ischemic heart disease in particular, while evidence for stroke was less clear.
On September 21, 2022, days before declaring the annexation of additional parts of Ukraine, Putin claimed in a national television address that high NATO officials had made statements about the possibility of "using nuclear weapons of mass destruction against Russia", and stated "if the territorial integrity of our country is threatened, we will certainly use all the means at our disposal to protect Russia and our people... It's not a bluff." NBC News characterized Putin's statements as a "thinly veiled" threat that Putin was willing to risk nuclear conflict if necessary to win the war with Ukraine. Hans M. Kristensen, director of the Nuclear Information Project at the Federation of American Scientists, stated that "if you start detonating nuclear weapons in the [battlefield] you potentially get radioactive fallout that you can't control — it could rain over your own troops as well, so it might not be an advantage to do that in the field." According to researcher Ryan Snyder the lethality of long-range precision conventional weapons may now possess lethalities against strategic missile silos comparable to those of nuclear-armed ballistic missiles. According to a peer-reviewed study published in the journal Nature Food in August 2022, a full-scale nuclear war between the U.S. and Russia would kill 360 million people directly, with a further 5 billion people dying from starvation. More than 2 billion people would die from a smaller-scale nuclear war between India and Pakistan. In March 2026, U.S.
Manufacture of lysosomal enzymes with a mannose-6-phosphate marker added in the cis-Golgi network. Manufacture of secreted proteins, either secreted constitutively with no tag or secreted in a regulatory manner involving clathrin and paired basic amino acids in the signal peptide. Integral membrane proteins that stay embedded in the membrane as vesicles exit and bind to new membranes. Rab proteins are key in targeting the membrane; SNAP and SNARE proteins are key in the fusion event. Initial glycosylation as assembly continues. This is N-linked (O-linking occurs in the Golgi). N-linked glycosylation: If the protein is properly folded, oligosaccharyltransferase recognizes the AA sequence NXS or NXT (with the S/T residue phosphorylated) and adds a 14-sugar backbone (2-N-acetylglucosamine, 9-branching mannose, and 3-glucose at the end) to the side-chain nitrogen of Asn. The RER has ribosomes while the SER does not.
It decomposes back to its elements at a temperature of above 523 K (250 °C; 482 °F), and is reduced by water to radon gas and hydrogen fluoride: it may also be reduced back to its elements by hydrogen gas. It has a low volatility and was thought to be RnF2. Because of the short half-life of radon and the radioactivity of its compounds, it has not been possible to study the compound in any detail. Theoretical studies on this molecule predict that it should have a Rn–F bond distance of 2.08 ångströms (Å), and that the compound is thermodynamically more stable and less volatile than its lighter counterpart xenon difluoride (XeF2). The octahedral molecule RnF6 was predicted to have an even lower enthalpy of formation than the difluoride. The [RnF]+ ion is believed to form by the following reaction:
== Simple flow models == Design equations are equations relating the space time to the fractional conversion and other properties of the reactor. Different design equations have been derived for different types of the reactor and depending on the reactor the equation more or less resemble that describing the average residence time. Often design equations are used to minimize the reactor volume or volumetric flow rate required to operate a reactor.
Sources: en.wikipedia.org
A low-sulfur diet is a diet with reduced sulfur content. Important dietary sources of sulfur and sulfur containing compounds may be classified as essential mineral (e.g. elemental sulfur), essential amino acid (methionine) and semi-essential amino acid (e.g. cysteine). Sulfur is an essential dietary mineral primarily because amino acids contain it. Sulfur is thus considered fundamentally important to human health, and conditions such as nitrogen imbalance and protein-energy malnutrition may result from deficiency. Methionine cannot be synthesized by humans, and cysteine synthesis requires a steady supply of sulfur.
== Education == Lee received a B.A. degree in chemistry from the University of Utah in 1971 and a Ph.D. in analytical chemistry from Indiana University Bloomington in 1975, after which he spent one year (1975–76) at the Massachusetts Institute of Technology as a postdoctoral research associate. Upon leaving MIT, he accepted a faculty position in the Chemistry Department at Brigham Young University, where he is the H. Tracy Hall Professor of Chemistry.
The symmetry of a carbon dioxide molecule is linear and centrosymmetric at its equilibrium geometry. The length of the carbon–oxygen bond in carbon dioxide is 116.3 pm, noticeably shorter than the roughly 140 pm length of a typical single C–O bond, and shorter than most other C–O multiply bonded functional groups such as carbonyls. Since it is centrosymmetric, the molecule has no electric dipole moment.
Kombucha can be prepared at home or commercially. It is made by dissolving sugar in non-chlorinated boiling water. Tea leaves are then steeped in the hot sugar water and discarded. The sweetened tea is cooled and the SCOBY culture is added. The mixture is then poured into a sterilized beaker along with previously fermented kombucha tea to lower the pH. This technique is known as "backslopping". The container is covered with a paper towel or breathable fabric to prevent insects, such as fruit flies, from contaminating the kombucha. The tea is left to ferment for a period of up to 10 to 14 days at room temperature, 18–26 °C (64–79 °F). A new "daughter" SCOBY will form on the surface of the tea to the diameter of the container. After fermentation is completed, the SCOBY is removed and stored along with a small amount of the newly fermented tea. The remaining kombucha is strained and bottled for a secondary ferment for a few days or stored at 4 °C (39 °F).
Sources: en.wikipedia.org
Low-end restaurants and street vendors are the biggest end users of gutter oil, as they operate with lower profit margins than bigger restaurants. Oil is a large kitchen supply cost for some restaurants, so obtaining cheaper oil can allow a marginal restaurant to reduce its overall expenses. Chinese food is generally heavily dependent on oil due to most foods being fried, so cheaper meal prices for many price-sensitive consumers are possible if gutter oil is used instead of virgin oil. The situation becomes more serious because it is hard to distinguish reprocessed gutter oil from legitimate oil. Bleach is used to transform gutter oil's dark color into a more natural-looking one, and alkali additives are used to neutralize the abnormal pH caused by high concentrations of animal fats. Used kitchen oil can be purchased for between US$859 and US$937 per ton, while the cleaned and refined product can sell for US$1,560 per ton. Thus there is great economic incentive to produce and sell gutter oil.
LNS is inherited in an X-linked recessive manner; the gene mutation is usually carried by the mother and passed on to her son, although one-third of all cases arise de novo (from new mutations) and do not have a family history. LNS is present at birth in baby boys. Most, but not all, persons with this deficiency have severe mental and physical problems throughout life. Cases in females are very rare. The symptoms caused by the buildup of uric acid (gout and kidney symptoms) respond well to treatment with medications such as allopurinol that reduce the levels of uric acid in the blood. The mental deficits and self-mutilating behavior do not respond well to treatment. There is no cure, but many affected people live to adulthood. Several new experimental treatments may alleviate symptoms.
According to the elders, roads to the districts had been closed for nearly two months because of cross-border fire by Pakistani forces, and Taliban authorities had neither reopened the routes nor built alternative roads as promised. Residents said that food supplies in local markets had been exhausted, and warned of a shortage of wheat and medicine in health centres. Later on the day, the roads leading to Kamdesh and Bargi Matal districts were temporarily reopened following a meeting between tribal elders of these districts and tribal elders of Pakistan's Chitral district. A polio vaccination team was attacked by militants in Hangu District with the subsequent clash resulting in the death of two militant whereas a policeman was killed and four more were injured. On 14 April, Punjab CTD claimed to have captured 16 "suspected terrorists" including a TTP suicide bomber. On 15 April, tribal elders from eastern Afghanistan and Pakistan's Chitral district reached an agreement to reopen key routes linking Kamdesh and Barg-i Matal in Nuristan after nearly two months of closure caused by firing from Pakistani border guards. The talks were held on the Pakistani side of the border, at a Pakistani military facility, and did not include Taliban representatives. Under the agreement, both sides committed to a ceasefire across areas including Nari, Kamdesh, Bargi Matal, Arandu, and Chitral. Local elders also said Pakistani forces asked communities not to allow Pakistani Taliban to shelter in the area, and that if anyone did so, local people should stand against them.
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.
SR9009 is a synthetic REV-ERB agonist used in laboratory research. It is not an approved drug, and its effects in humans are not well characterized. It is often sold as a research chemical under the name Stenabolic.