The short version of ACTH(4-10) fits in a sentence. The long version — which is the one that helps — is below.
Reviewed 2026-02-15. Anything still debated is marked as such rather than presented as settled.
Routine characterization relies on reversed-phase high-performance liquid chromatography to establish purity and on mass spectrometry to confirm molecular identity. Electrospray ionization and matrix-assisted laser desorption ionization are both used for mass verification. Amino acid analysis and peptide mapping can detect sequence errors. Common impurities include truncated sequences, methionine sulfoxide formed by oxidation, and deamidated products. Chromatograms are usually recorded near 214 nm, where the peptide backbone absorbs, and purity is reported as the percentage area of the principal peak.
Verification of a supplied batch generally combines a certificate of analysis with independent testing, because certificates are self-reported documents. A typical package includes a chromatographic trace, a mass spectrum, and a stated water or counter-ion content. Batch-to-batch consistency matters more than a single purity figure when results are compared across experiments. No single mandatory standard governs research-grade peptide release, so laboratories are expected to define their own acceptance criteria. Residual trifluoroacetate from purification is a frequently overlooked counter-ion.
The compound is registered in Russia as a pharmaceutical product, most commonly formulated as a nasal solution, and has been used in that setting since the 1990s. Outside that jurisdiction it is generally handled as a research chemical rather than an approved medicine. Regulatory status therefore differs sharply between countries, and material sold internationally may not correspond to the Russian pharmaceutical formulation. Documentation with commercial samples is typically limited to a certificate of analysis covering purity and identity, not clinical status or local legal classification.
Semax is a synthetic heptapeptide with the sequence Met-Glu-His-Phe-Pro-Gly-Pro. It corresponds to the ACTH(4-7) fragment extended at the C-terminus by a Pro-Gly-Pro tripeptide, an addition intended to slow enzymatic breakdown. The molecular formula is C37H51N9O10S and the molecular mass is approximately 814 daltons. In the literature it is often described as an ACTH(4-10) analog, although that label reflects a naming convention as much as a precise structural relationship. The compound was developed in Russia and remains most closely associated with that research tradition.
Laboratory descriptions of the material are consistent across suppliers. It appears as a white to off-white lyophilized powder that dissolves readily in water and in polar organic solvents such as dimethyl sulfoxide. Aqueous solutions are clear and colorless at low concentrations. Because the peptide contains methionine, oxidation at the sulfur atom is a recognized degradation pathway, and handling notes usually call for protected, desiccated storage. Reported purity for research-grade lots is generally above 95 percent as measured by reversed-phase high-performance liquid chromatography.
| Property | Value | Notes |
|---|---|---|
| Typical purity | 95% or higher | By reversed-phase HPLC area |
| Identity method | Electrospray mass spectrometry | Confirms molecular mass |
| Purity method | Reversed-phase HPLC | Detection near 214 nm |
| Primary degradation | Methionine oxidation | Sulfoxide product, +16 Da |
| Solution storage | 2-8 °C, short term | Aliquot to avoid freeze-thaw |
Circulation time for the peptide is short because peptidases cleave it readily. The Pro-Gly-Pro tail is thought to slow breakdown compared with the bare ACTH fragment, but the gain appears modest. Absorption after intranasal dosing is limited, and only a fraction of a dose is expected to reach the central nervous system. Laboratory concentrations therefore sit well above levels achieved systemically, a gap that complicates translation from bench findings to clinical claims.
The mechanisms attributed to semax are inferred from animal and cell studies rather than traced to one confirmed target. The most frequently cited pathway involves increased expression of brain-derived neurotrophic factor and nerve growth factor in hippocampal and cortical tissue. Some work points to engagement of melanocortin receptors, particularly MC4, which the parent ACTH fragment can activate. Effects on dopaminergic and serotonergic signalling have also been reported. No single account explains all observed results, and the relative weight of each pathway remains unsettled.
The C-terminal Pro-Gly-Pro extension is not incidental. Proline-rich tails are known to resist several common peptidases, and the published literature attributes the longer half-life of Semax, relative to unmodified ACTH fragments, to this feature. The modification also removes the melanocyte-stimulating and corticosteroidogenic activity that characterizes longer ACTH-derived sequences. Because the molecule is small and hydrophilic, it is typically formulated as an aqueous solution for intranasal or parenteral delivery. Acetylation or amidation at the termini appears in closely related research peptides and shifts the mass by a fixed increment.
Reported pharmacological work centers on neurotrophic signaling, including changes in BDNF and NGF expression in hippocampal tissue in animal models. Human data come largely from studies conducted in Russia, and how well those results generalize to other populations remains an open question. Regulatory status differs sharply by jurisdiction: Semax is a registered prescription medicine in Russia, while it holds no approved marketing status in the United States or the European Union. Outside such jurisdictions it is generally handled as a research chemical, which affects both documentation and quality expectations.
Semax is a synthetic heptapeptide whose sequence is Met-Glu-His-Phe-Pro-Gly-Pro. It was developed as a fragment analog of adrenocorticotropic hormone, modeled specifically on the ACTH(4-10) region. The first four residues reproduce that fragment, while a Pro-Gly-Pro tripeptide is appended at the C-terminus. Work on the compound originated in Russia, where it entered clinical use as an intranasal preparation. Its sequence places it among short regulatory peptides studied for effects on the central nervous system rather than on the adrenal axis.
== Organization and administration == The University of Arizona, like its sister institutions Arizona State University and Northern Arizona University, is governed by the Arizona Board of Regents or the ABOR, a 12-member body. Eight volunteer members are appointed by the Governor to staggered eight-year terms; two students serve on the board for two-year appointments, with the first year being a nonvoting apprentice year. The Governor and the Superintendent of Public Instruction serve as voting ex-officio members. The ABOR provides "policy guidance" and oversight to the three major degree-granting universities, as provided for by Title 15 of the Arizona Revised Statutes. Suresh Garimella was named the 23rd president of the U of A on August 9, 2024. Previously, he was the president of the University of Vermont from 2019 to 2024. Garimella has also previously served as the Executive Vice President for Research and Partnerships, a Chief Global Affairs Officer, and was recognized as a Goodson Distinguished Professor of Mechanical Engineering at Purdue University. Garimella replaced Robert C. Robbins, MD. He was named as the lone finalist to succeed as president after Robbins announced his plans to step down at the end of his current contract, or before if a suitable successor was identified, during an ABOR meeting on April 2, 2024.
The American Way supermercato the year before and Supermarket USA were among the first of several instances in which American supermarkets were deployed internationally at the height of the Cold War as shock and awe instruments of American propaganda to demonstrate the supposed superiority of Western Bloc capitalism over Eastern Bloc communism. Before then, a few countries had already begun to implement supermarkets due to their proximity to or affinity for the United States. Canada, to the north, had implemented the new retail format at the same time during the 1930s. For example, Québec's first supermarket opened in 1934 in Montréal, under the banner Steinberg's. In Canada, the largest supermarket chain is Loblaw, which operates stores under a variety of banners targeted to different segments and regions, including Fortinos, Zehrs, No Frills, the Real Canadian Superstore, and Loblaws, the foundation of the company. Sobeys is Canada's second largest supermarket with locations across the country, operating under many banners (Sobeys IGA in Quebec). In the United Kingdom, self-service shopping took longer to become established, despite its Special Relationship with the United States. In 1947, there were just ten self-service shops in the country. In 1951, ex-US Navy sailor Patrick Galvani, son-in-law of Express Dairies chairman, made a pitch to the board to open a chain of supermarkets across the country.
=== Manual solutions === Manual methods such as HEPA filtered vacuuming serves as a backup to eliminating mold via environmental control. HEPA vacuums possess air filters that do not allow mold to be spread into the air again. Installing drying fans, wiping dry books and surrounding furniture, as well as air ducts and shelves will also help to prevent further infestations. In extreme cases, some books and items are discarded to protect the rest of the collection from being affected. These preservation activities are provided by available library staff or hired contractors.
2-Pentanol (IUPAC name: pentan-2-ol; also called sec-amyl alcohol) is an organic chemical compound. It is used as a solvent and an intermediate in the manufacturing of other chemicals. 2-Pentanol is a component of many mixtures of amyl alcohols sold industrially. 2-Pentanol is chiral and thus can be obtained as either of two stereoisomers designated as (R)-(−)-2-pentanol and (S)-(+)-2-pentanol. 2-Pentanol has been detected in fresh bananas by gas chromatography–mass spectrometry, at an abundance of 14.26±2.63 ppm.
In 1871, Thomas Lipton (1848–1931) of Glasgow, Scotland, used his small savings to open a shop; by the 1880s the business had grown to more than 200 stores. In 1929, the Lipton grocery retail business was one of the companies that merged with Home and Colonial Stores, Maypole Dairy Company, Vyes & Boroughs, Templetons and Galbraiths & Pearks to form a food group with more than 3,000 shops. The group traded in the High Street under various names, but was registered on the UK stock market as Allied Suppliers; Allied Stores was originally formed in 1929 to act as the group's purchasing arm. Lipton's became a supermarket chain focused on small towns. Allied was acquired by Argyll Foods in 1982; the supermarket business was rebranded as Presto during the 1980s.
Sources: en.wikipedia.org
Molecular: HCHO + hν → H2 + CO (λ < 360 nm) Radical: HCHO + hν → H + HCO (λ < 330 nm) The H and HCO radicals react with the atmospheric O2 to form hydroperoxyl (HO2) radicals, giving a net radical channel of:
Seeing her escape avenue, Owens agreed and vacuumed the house to indicate her acquiescence to becoming an extended member of the family. Later that day, Owens escaped from a launderette she and Rose had entered and returned home. Although initially too ashamed to divulge what had happened, when her mother noted the welts, bruises and exposed subcutaneous tissues on her daughter's body, Owens burst into tears and confided her ordeal. Owens' mother immediately reported her daughter's story to police, and the Wests were arrested and charged with assault, indecent assault, actual bodily harm and rape. The case was tried at Gloucester Magistrates Court on 12 January 1973, but by this date Owens had decided she could not face the ordeal of giving testimony. All charges pertaining to her ordeal were dropped, and the Wests agreed to plead guilty to the reduced charges of indecent assault and causing actual bodily harm. Rose and Fred were each fined £50 (equivalent to £1,000 in 2025) and the couple were allowed to walk free. When Owens heard this news, she attempted suicide.
Insects as food or edible insects are insect species used for human consumption. Over 2 billion people are estimated to eat insects on a daily basis. Globally, more than 2,000 insect species are considered edible, though far fewer are discussed for industrialized mass production and regionally authorized for use in food. Many insects are highly nutritious, though nutritional content depends on species and other factors such as diet and age. Insects offer a wide variety of flavors and are commonly consumed whole or pulverized for use in dishes and processed food products such as burger patties, pasta, or snacks. Like other foods, there can be risks associated with consuming insects, such as allergic reactions. As commercial interest in insects as food grows, countries are introducing new regulatory frameworks to oversee their production, processing, marketing, and consumption.
bidirectional replication A common mechanism of DNA replication in which two replication forks move in opposite directions away from the same origin; this results in a bubble-like region where the duplex molecule is locally separated into two single strands.
Although naturally occurring double-strand breaks occur at a relatively low frequency in DNA, their repair often causes mutation. Non-homologous end joining (NHEJ) is a major pathway for repairing double-strand breaks. NHEJ involves removal of a few nucleotides to allow somewhat inaccurate alignment of the two ends for rejoining followed by addition of nucleotides to fill in gaps. As a consequence, NHEJ often introduces mutations.
Sources: en.wikipedia.org
=== Usage prevalence === A September 2025 national survey of American adults conducted by the RAND Corporation found that the most commonly used psychedelics and related drugs (past-year use) were psilocybin (4.3%), MDMA or MDA (1.8%), Amanita muscaria (1.3%), ketamine (1.3%), LSD (1.1%), DMT (0.84%), mescaline (0.53%), 2C-B (0.46%), Salvia divinorum (0.43%), ibogaine or iboga (0.36%), and 5-MeO-DMT (0.30%). The survey also found that about 3.7% of adults had microdosed in the past year, with the most frequent drugs being psilocybin, MDMA, and LSD.
Watson was retrospectively ruled ineligible for the award by the commission, and the medal then awarded to the next-highest vote-getters, Richmond's Trent Cotchin and then-Hawthorn player Sam Mitchell (who had just been traded to the West Coast Eagles at the time), under the normal rules regarding ineligible players in Brownlow Medal counts. Watson had pre-empted the decision by announcing on 11 November 2016 that he would hand back the medal.
La Familia Michoacana was a drug cartel based in Michoacán between at least 2006 and 2011. It was formerly allied with the Gulf Cartel and Los Zetas, but split off to become an independent organization. La Familia Michoacana was the first cartel targeted by President Calderón's security strategy, beginning with Operation Michoacán in December 2006. Between 2009 and 2010, joint U.S.–Mexican operations led to the arrest of hundreds of La Familia members and the reported death of founder Nazario Moreno González ("El Más Loco"). The group soon split between the Knights Templar Cartel and a faction led by José de Jesús Méndez Vargas ("El Chango"), who was arrested in 2011, after which authorities declared La Familia dismantled, leaving the Knights Templar as its de facto successor. In February 2010, La Familia allied with the Gulf Cartel against Los Zetas and the Beltrán-Leyva Cartel. La Nueva Familia Michoacana emerged from splinters of La Familia in the early 2010s, rebranding while continuing operations in Michoacán and Guerrero, and clashing with the Jalisco New Generation Cartel.
=== Cell design === Operando spectroscopy requires measurement of the catalyst under (ideally) real working conditions, involving comparable temperature and pressure environments to those of industrially catalyzed reactions, but with a spectroscopic device inserted into the reaction vessel. The parameters of the reaction are then measured continuously during the reaction using the appropriate instrumentation, i.e., online mass spectrometry, gas chromatography or IR/NMR spectroscopy. Operando instruments (in situ cells) must ideally allow for spectroscopic measurement under optimal reaction conditions. Most industrial catalysis reactions require excessive pressure and temperature conditions which subsequently degrades the quality of the spectra by lowering the resolution of signals. Currently many complications of this technique arise due to the reaction parameters and the cell design. The catalyst may interact with the components of the operando apparatus; open space in the cell can have an effect on the absorption spectra, and the presence of spectator species in the reaction may complicate analysis of the spectra. Continuing development of operando reaction-cell design is in line with working towards minimizing the need for compromise between optimal catalysis conditions and spectroscopy. These reactors must handle specific temperature and pressure requirements while still providing access for spectrometry.
Sources: en.wikipedia.org
Dry powder is normally held at -20 °C or lower, away from light and moisture. Sealed vials can also be kept at 2-8 °C for shorter intervals. Warming to room temperature before opening prevents condensation.
In solution, hydrolysis of peptide bonds and oxidation of the methionine residue are the principal concerns. Oxidation converts methionine to its sulfoxide form, shifting the mass by sixteen daltons. Both processes are slowed by cold storage and by avoiding alkaline conditions.
A certificate documents what the supplier measured on a specific lot, not how a laboratory will use the material. Independent verification of identity and purity is common practice. Acceptance criteria should be defined before a batch is ordered.
It is registered as a pharmaceutical product in Russia, where it is typically supplied as a nasal solution. In most other countries it is not an approved drug and is traded as a research chemical instead. Approval status depends entirely on the jurisdiction involved.