A practical reference on Reference standard: what it is, how it behaves, what the literature reports, and where the honest uncertainties sit.
Reviewed 2026-02-13. Anything still debated is marked as such rather than presented as settled.
Activation of PPARδ changes transcription of genes involved in fatty acid transport, mitochondrial function, and skeletal muscle fuel preference. In rodent studies, pharmacological PPARδ activation was associated with increased endurance and altered body composition. These findings generated interest in performance enhancement, but species differences and study designs limit direct extrapolation to humans. Small human trials were conducted in the 2000s and later discontinued. The extent to which cardarine produces similar metabolic or performance effects in people remains an open question.
The compound is typically described as a laboratory compound rather than a therapeutic product. Published reports have explored its role in lipid disorders, insulin sensitivity, and exercise metabolism, yet no major drug regulator has approved it for medical use. Commercial samples sold under the cardarine name may vary in purity and identity. Analytical confirmation is therefore necessary when the material is discussed in scientific or regulatory contexts. Its classification as a prohibited substance in sport further shapes how it is studied and reported.
Cardarine is frequently described as a fat-burning or endurance-enhancing supplement, but these claims exceed the available evidence. The compound is not a hormone, steroid, or selective androgen receptor modulator. Research articles discuss it as a tool compound for studying PPARδ biology, while anti-doping literature focuses on its abuse and detection. Quality of unapproved products is uncertain, and independent analyses have found impurities or incorrect labeling. Open questions include whether human cancer risk resembles that seen in rodents and how often non-athletes use the substance.
Cardarine has no approved therapeutic indication and is not marketed as a medicine. The World Anti-Doping Agency lists GW501516 as a prohibited substance at all times, covering both in-competition and out-of-competition periods. National laws vary: some countries treat it as an unapproved drug subject to import controls, while others have specific restrictions on sale for human consumption. It is often sold as a research chemical, a label that does not imply safety or legality. Enforcement actions have targeted online vendors and shipments.
Anti-doping laboratories identify GW501516 and related metabolites using liquid chromatography coupled with tandem mass spectrometry. Urine is the most common matrix, though blood and dried blood spots may also be analyzed. The method targets the parent compound and phase I and phase II metabolites, which extend the detection window. Because the substance is prohibited at all times, athletes can be tested outside competition. Detection limits and windows depend on the assay, sample type, and individual metabolism.
| Property | Value | Notes |
|---|---|---|
| Chemical class | Synthetic PPARδ agonist | Not a steroid or a selective androgen receptor modulator. |
| Common synonyms | Cardarine, GW501516, GW-501516, endurobol | Names vary by supplier and literature source. |
| Appearance | White to off-white powder | Consistent with many small-molecule research chemicals. |
| Solubility | Low in water; soluble in DMSO and ethanol | Often prepared in organic solvent for laboratory work. |
| Primary target | PPARδ (NR1C2) | Nuclear receptor involved in lipid and energy metabolism. |
Quality assessment for cardarine samples usually combines identity, purity, and impurity testing. Nuclear magnetic resonance spectroscopy and mass spectrometry can confirm molecular structure, while high-performance liquid chromatography estimates purity. Certificates of analysis from testing laboratories may list these results, but they do not establish safety or legality. In the absence of approved manufacturing, products sold online may contain the wrong compound, variable amounts, or unlisted contaminants. Independent verification is therefore central to analytical work and to interpreting any reported biological activity.
Laboratory detection of GW501516 commonly uses liquid chromatography coupled with tandem mass spectrometry. The method can identify the parent compound or its metabolites in urine and blood after sample cleanup. Protein precipitation, solid-phase extraction, or enzymatic hydrolysis may precede analysis, depending on the matrix. Reference standards are required for accurate quantification and confirmation. Because the compound is not approved, testing often occurs in anti-doping, forensic, or research settings rather than routine clinical care. Results are reported with limits of detection and quantification.
Detection of GW501516 in biological samples generally relies on liquid chromatography coupled with tandem mass spectrometry. Urine is a common matrix in anti-doping analysis, while blood or plasma may be used in research settings. Sample preparation can involve enzymatic hydrolysis, protein precipitation, or solid-phase extraction before instrumental analysis. Because the compound undergoes metabolism, assays may target the parent molecule, one or more metabolites, or both. Detection windows are not fixed; they depend on factors such as dose, route, individual metabolism, and assay sensitivity. Reference standards are required for accurate identification and quantification.
Handling and quality assessment of cardarine reference material follow general laboratory practices for poorly characterized compounds. It typically appears as a white to off-white powder and is sparingly soluble in water but soluble in organic solvents such as dimethyl sulfoxide and ethanol. Storage recommendations usually specify a cool, dry, dark place, with long-term storage at low temperature and desiccation. Purity may be checked by high-performance liquid chromatography with ultraviolet detection, while identity is confirmed by mass spectrometry and nuclear magnetic resonance. No pharmacopeial monograph exists, so reported purity and stability depend on the supplier’s methods.
GW501516 acts as a selective agonist at PPARδ, a nuclear receptor that regulates transcription of genes involved in lipid handling and energy metabolism. Activation of PPARδ in preclinical models increases fatty acid oxidation, mitochondrial biogenesis, and exercise endurance in rodents. These effects have made the compound a subject of metabolic research and also a target for sport anti-doping rules. In humans, however, controlled studies are limited, and whether similar endurance or metabolic changes occur at tolerated exposures remains an open question. The receptor’s broad tissue distribution also means downstream effects may vary by organ and condition.
Southern Ohio Medical Center (or SOMC) is a 216-bed 501(C)(3) not-for-profit hospital in Portsmouth, Ohio. It provides emergency and surgical care, as well as other health care services. SOMC employs 2,600 full-time employees and part-time employees, has a medical staff of more than 140 physicians and specialists, and is supported by approximately 800 volunteers. In 2020, Fortune magazine ranked Southern Ohio Medical Center at number 22 of their Fortune List of the Top 100 Companies to Work For based on an employee survey of satisfaction.
=== Stimulation of Other Relevant Pregnancy Hormones === CGB triggers the body to create more estrogen and progesterone. In tandem with CGB, the increased estrogen and progesterone signal to the body that pregnancy is occurring, and help thicken the uterine lining and stop menstruation. It is the precise balance of these three hormones that help to sustain and maintain a healthy pregnancy. More specifically, CGB is a luteotropic hormone that promotes the survival and steroidogenic activity of corpus luteum by acting through luteinizing hormone receptors (LHRs) expressed on luteinized theca and granulosa cells. Through this activation, the corpus luteum produces the progesterone needed for the subsequent stages of pregnancy. This helps to keep the highly crucial corpus luteum alive and activated.
6 July – One child dies, while 16 are injured after a Land Rover hits a primary school in Wimbledon, south-west London. The crash is not treated as terror-related, but the driver is arrested on suspicion of causing death by dangerous driving. The UK Health Security Agency and Met Office issue a yellow heat health alert for six regions of England, effective from 12pm on 7 July to 9am on 9 July, when temperatures are expected to reach 28 °C–30 °C in some areas. RMT workers on the London Underground announce six days of strikes from Sunday 23 July to Friday 28 July. 7 July – British cinema chain Empire Cinemas collapses into administration with the immediate loss of 150 jobs, citing the impact of the COVID-19 pandemic and the ongoing cost-of-living crisis as the main reasons. The closures leave Sunderland and Wigan with no main cinema. 8 July – The Union Chain Bridge, which spans the River Tweed, linking England and Scotland, is named as an International Historic Civil Engineering Landmark. 9 July – A second child dies of injuries sustained in the crash at a school in Wimbledon, south London. 10 July – A teenage boy is arrested on suspicion of attempted murder after a teacher is stabbed at Tewkesbury School in Gloucestershire. The school, along with neighbouring schools, are locked down during the incident. The teacher is hospitalised. He is charged with attempted wounding with intent and possession of bladed article the next day.
P-ATPases (sometime known as E1-E2 ATPases) are found in bacteria and also in eukaryotic plasma membranes and organelles. Its name is due to short time attachment of inorganic phosphate at the aspartate residues at the time of activation. Function of P-ATPase is to transport a variety of different compounds, like ions and phospholipids, across a membrane using ATP hydrolysis for energy. There are many different classes of P-ATPases, which transports a specific type of ion. P-ATPases may be composed of one or two polypeptides, and can usually take two main conformations, E1 and E2.
In early 1970, Parsons signed a solo deal with A&M Records and moved in with producer Terry Melcher. The two shared a penchant for cocaine and heroin, and the sessions were largely unproductive, with Parsons eventually losing interest in the project. The master tapes were lost; it is unclear who took them. Parsons accompanied the Rolling Stones on its 1971 UK tour in the hope of being signed to the newly formed Rolling Stones Records. He lived at Richards' French villa Nellcôte during the recording of Exile on Main Street, though he contributed little to the process. His drug use and constant quarrelling with his girlfriend, Gretchen Burrell, led to a request to leave by Richards' girlfriend, Anita Pallenberg. Parsons attempted to rekindle his relationship with the band on its 1972 American tour, to no avail. Parsons returned to the US for a one-off concert with the Burritos. In Washington, D.C., he met Emmylou Harris and asked her to join him in Los Angeles to record his first solo album. It came as a surprise to many when Parsons was signed to Reprise Records by Mo Ostin in mid-1972. The ensuing GP (1973) featured several members of Elvis Presley's TCB Band. It included six new songs from Parsons alongside several country covers, including Tompall Glaser's "Streets of Baltimore" and George Jones' "That's All It Took". Parsons, now featuring Harris as his duet partner, toured across the US as Gram Parsons and the Fallen Angels in February–March 1973.
Sources: en.wikipedia.org
Pakistan boasts literature in various languages including Urdu, Sindhi, Punjabi, Pashto, Baluchi, Persian, English, and more. The Pakistan Academy of Letters actively promotes literature and poetry both domestically and internationally. National Library contributes to literary dissemination. Historically, Pakistani literature consisted mainly of lyric, religious, and folkloric works, later diversifying under colonial influence into prose fiction, now widely embraced. The national poet of Pakistan, Muhammad Iqbal, wrote influential poetry in Urdu and Persian, advocating for Islamic civilisational revival. Notable figures in contemporary Urdu literature include Josh Malihabadi, Faiz Ahmed Faiz, and Saadat Hasan Manto. Popular Sufi poets like Shah Abdul Latif and Bulleh Shah are revered. Mirza Kalich Beg is hailed as the father of modern Sindhi prose. Pakistani philosophy has been shaped by influences from British and American philosophy, with notable figures like M. M. Sharif contributing to its development. After 1971, Marxist thought gained prominence in Pakistani philosophy through figures like Jalaludin Abdur Rahim.
== Medical uses == Topilutamide is used as a topical medication in the treatment of pattern hair loss in men and women. Topilutamide is approved for cosmetic use in Europe but has not received FDA approval nor approval by the EMA for the treatment of androgenetic alopecia. Finasteride and Minoxidil are currently the only treatments approved for the treatment of this condition.
=== Spoofing jammers, jitter === A second jamming system was eventually activated at Cap Gris Nez in September, using a system that triggered its signal in response to the reception of a pulse from CH. This meant that the system responded to the CH station even if it moved its time slot. These systems, known as Garmisch-Partenkirchen, were used during Operation Donnerkeil in 1941. Further improvements to the basic concept allowed multiple returns to be generated, appearing like multiple aircraft on the CH display. Although these new jammers were relatively sophisticated, CH operators quickly adapted to them by periodically changing the pulse repetition frequency (PRF) of their station's transmitter. This caused the synchronized jamming signals to briefly go out of synch with the station, and the blips from the jammers would "jitter" on the screen, allowing them to be visually distinguished. The "Intentional Jitter Anti-Jamming Unit", IJAJ, performed this automatically and randomly, making it impossible for the German jammers to match the changes. Another upgrade helped reject unsynchronized pulses, supplanting the two-layer display. This device, the "Anti-Jamming Black-Out" unit, AJBO, fed the Y-axis signal into a delay and then into the brightness control of the CRT. Short pulses that appeared and disappeared were muted, disappearing from the display. Similar techniques using acoustic delay lines, both for jamming reduction and filtering out noise, became common on many radar units during the war.
=== Hungarian === American Hungarian Catholic Society - Founded in 1894. Headquarters in Cleveland. Aside from insurance, they assist aged members, visit sick and bereaved, and provide service to local parishes. 1965 members 2,430; 1977 members 1,200. Hungarian Reformed Federation of America Verhovay Fraternal Insurance Association - Founded in Pennsylvania as Verhovay Aid Association, changed name in 1935 21,512 members at the end of 1922, and at that time was headquartered in Hazleton, Pennsylvania. It had 40,000 members in 1955 the same year it merged with William Penn William Penn Association
Heminasal and total nasal reconstruction The reconstruction rhinoplasty of an extensive heminasal defect or of a total nasal defect is an extension of the plastic surgical principles applied to resolving the loss of a regional aesthetic subunit. The skin layers are replaced with a paramedian forehead flap, but, if forehead skin is unavailable, the alternative corrections include the Washio retroauricular-temporal flap and the Tagliacozzi flap. The nasal skeleton is replaced with a rib-graft nasal dorsum and lateral nasal wall; septal cartilage grafts and conchal cartilage grafts are applied to correct defects of the nasal tip and of the alar lobules. The nasal lining of the distal two-thirds of the nose can be covered with anteriorly based septal mucosal flaps; however, if bilateral septal-flaps are used, the septal cartilage does become devascularized, possibly from iatrogenic septal perforation. Furthermore, if the nasal defect is beyond the wound-correction scope of a septal mucosal flap, the alternative techniques are either an inferiorly based pericranial-flap (harvested from the frontal bone) or a free flap of temporoparietal fascia (harvested from the head), either of which can be lined with free grafts of mucosa to achieve the nasal reconstruction.
Sources: en.wikipedia.org
Worldwide: alcohol (beer, wine), vinegar, olives, yogurt, bread, cheese Asia East and Southeast Asia: amazake, atchara, belacan, burong mangga, com ruou, doenjang, douchi, fish sauce, lah pet, lambanog, kimchi, kombucha, leppet-so, narezushi, miso, nata de coco, nattō, ngapi, oncom, padaek, pla ra, prahok, ruou nep, sake, shrimp paste, soju, soy sauce, stinky tofu, tape, tempeh, tempoyak, zha cai Central Asia: kumis, kefir, shubat, qatiq (yogurt) South Asia: achar, appam, dosa, dhokla, dahi (yogurt), idli, mixed pickle, ngari, sinki, tongba, paneer Africa: garri, injera, laxoox, mageu, ogi, ogiri, iru Americas: chicha, chocolate, vanilla, hot sauce, tepache, tibicos, pulque, muktuk, kiviak, parakari Middle East: torshi, boza Europe: sourdough bread, elderberry wine, kombucha, pickling, rakfisk, sauerkraut, pickled cucumber, surströmming, mead, kvass, salami, sucuk, prosciutto, cultured milk products such as quark, kefir, filmjölk, crème fraîche, smetana, skyr, rakı, tupí, żur. Oceania: poi, kānga pirau
In times of severe political confrontation and radical economic change, members of Mikołajczyk's agrarian movement (the Polish People's Party) attempted to preserve the existing aspects of mixed economy and protect property and other rights. However, after the 1947 elections, the Government of National Unity ceased to exist and the communists moved towards abolishing the post-war partially pluralistic "people's democracy" and replacing it with a state socialist system. The communist-dominated front Democratic Bloc of the 1947 elections, turned into the Front of National Unity in 1952, became officially the source of governmental authority. The Polish government-in-exile, lacking international recognition, remained in continuous existence until 1990.
=== Research and regulation === Rhodiola has been used as a dietary supplement. According to Memorial Sloan Kettering Cancer Center, Rhodiola rosea is used in Asia and Eastern Europe in the forms of capsules, liquid extracts and tablets as a traditional medicine. Through 2019, human studies evaluating R. rosea did not have sufficient quality to determine whether it has properties affecting fatigue or any other condition. The U.S. Food and Drug Administration (FDA) has issued warning letters to manufacturers of R. rosea dietary supplement products unapproved as new drugs, adulterated, misbranded and in federal violation for not having proof of safety or efficacy for the advertised conditions of alleviating Raynaud syndrome, altitude sickness, depression or cancer. A 2012 report by the European Medicines Agency on literature concerning the dried extract of R. rosea stated that "The published clinical trials exhibit considerable deficiencies in their quality. Therefore 'well-established use' cannot be accepted".
Samberg starred in Sleater-Kinney's "No Cities to Love" video along with other actors such as Fred Armisen, Elliot Page, and Norman Reedus. On May 16, 2016, Samberg and the Lonely Island performed their 2009 hit "I'm on a Boat" with classroom instruments on The Tonight Show Starring Jimmy Fallon, as part of a recurring segment on the show.
Sources: en.wikipedia.org
Cardarine is a common name for GW501516, a synthetic PPARδ agonist. It is not a steroid or a selective androgen receptor modulator. It was developed and studied as a research compound for metabolic pathways.
It binds to and activates PPARδ, a nuclear receptor that regulates genes related to fatty acid oxidation and energy use. This activation alters transcription in tissues such as skeletal muscle and liver. The full range of downstream effects in humans is not fully established.
No, cardarine is not known to occur naturally in plants, animals, or humans. It is a synthetic molecule produced for laboratory research. Products labeled as cardarine should therefore be treated as manufactured chemicals with variable purity.
Legal status varies by country. It is not approved as a medicine, and it is prohibited in sport. Some jurisdictions restrict import, sale, or possession.