neuropeptide 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 2025-08-23. Numbers and descriptions here follow the published literature rather than marketing material.
Published research on this peptide originates mainly from Russian laboratories, and the wider international literature is comparatively thin. Studies have used rodent models of stroke, hypoxia, and memory tasks, with a smaller number of human trials reported. Reported outcomes include changes in attention and memory measures, along with effects on neurotrophic factor expression in some experiments. Small sample sizes, inconsistent dosing protocols, and limited independent replication are widely noted limitations, so the strength of the clinical evidence remains an open question.
Semax is a synthetic heptapeptide whose sequence is Met-Glu-His-Phe-Pro-Gly-Pro. The first four residues correspond to the ACTH(4-10) fragment, while the terminal Pro-Gly-Pro extension was added to improve metabolic stability. Its molecular formula is C37H51N9O10S and its monoisotopic mass is approximately 813.9 Da. The compound is classified as a peptide research chemical and as a registered pharmaceutical product in Russia, but it does not hold marketing approval in the European Union or the United States. Naming conventions vary across supplier catalogs.
Development of the compound took place in the Soviet Union during the 1980s, largely through peptide research groups affiliated with the Shemyakin-Ovchinnikov Institute and Moscow State University. Investigators screened fragments of adrenocorticotropic hormone for activity on the central nervous system while attempting to separate cognitive effects from hormonal ones. The shortened sequence was selected because it retained behavioral activity in animal models without stimulating corticosteroid release. Early publications described the molecule as an ACTH(4-10) analog.
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.
| Property | Value | Notes |
|---|---|---|
| Molecular formula | C37H51N9O10S | Seven-residue peptide |
| Molecular mass | 813.9 Da | Monoisotopic value |
| Appearance | White to off-white powder | Lyophilized form |
| Solubility | Freely soluble in water | Also soluble in saline and polar solvents |
| Storage (dry) | -20 °C or lower | Desiccated, protected from light |
Pharmacological accounts link semax to melanocortin signalling and to modulation of neurotrophic factor expression, particularly brain-derived neurotrophic factor and nerve growth factor. Much of this evidence comes from rodent studies using intranasal delivery, a route chosen because it allows peptides to reach the central nervous system with limited systemic exposure. Whether the same mechanisms operate in humans at comparable magnitude remains an open question. The precise receptor or receptors responsible for the reported behavioural and neuroprotective effects have not been conclusively identified.
Clinical reports describe use in ischaemic stroke, transient ischaemic attack, optic nerve conditions, and cognitive complaints, but most of these studies are small and were conducted in a single region. Systematic reviews have generally described the evidence base as limited in size and variable in methodological quality. Randomised controlled data suitable for international regulatory assessment are scarce. As a result, major treatment guidelines outside Russia do not include the peptide, and interest in it remains largely research-driven rather than routine clinical.
Development took place during the 1980s at institutes of the Russian Academy of Sciences, where peptide fragments of ACTH were screened for cognitive and neuroprotective effects. The compound received regulatory approval in Russia as a nasal preparation, marketed for conditions such as ischemic stroke, transient ischemic attacks, and optic nerve disorders. Registration in other countries has not followed. Most published clinical reports originate from a small number of Russian research groups, and independent replication outside that setting remains limited. The regulatory status therefore differs sharply between Russia and the rest of the world.
Laboratory work points toward modulation of neurotrophic signaling, particularly expression of brain-derived neurotrophic factor and nerve growth factor in hippocampal tissue. Studies also describe effects on monoamine turnover, inflammatory mediators, and oxidative markers. These observations come mainly from animal models and cultured cells, so the causal chain in humans is not firmly established. Whether the reported molecular changes translate into measurable clinical benefit is an open question. Reviews generally present the mechanism as plausible rather than demonstrated.
=== 19S regulatory particle === The 19S particle in eukaryotes consists of 19 individual proteins and is divisible into two subassemblies, a 9-subunit base that binds directly to the α ring of the 20S core particle, and a 10-subunit lid. Six of the nine base proteins are ATPase subunits from the AAA Family, and an evolutionary homolog of these ATPases exists in archaea, called PAN (proteasome-activating nucleotidase). The association of the 19S and 20S particles requires the binding of ATP to the 19S ATPase subunits, and ATP hydrolysis is required for the assembled complex to degrade folded and ubiquitinated proteins. Note that only the step of substrate unfolding requires energy from ATP hydrolysis, while ATP-binding alone can support all the other steps required for protein degradation (e.g., complex assembly, gate opening, translocation, and proteolysis). In fact, ATP binding to the ATPases by itself supports the rapid degradation of unfolded proteins. However, while ATP hydrolysis is required for unfolding only, it is not yet clear whether this energy may be used in the coupling of some of these steps.
effective molecular diameter The physical extent of the electron cloud surrounding a molecule of a particular gas, as calculated in any of several ways and usually expressed in nanometres or ångströms.
=== King's Police Medal (KPM) === Bernard Kenneth Bonamy Jr., Assistant Commissioner of Police, Royal Bahamas Police Force. Theophilus Andrew Cunningham. Assistant Commissioner of Police, Royal Bahamas Police Force.
== International Organization for Standardization (ISO) == CLSI participates in the development of international standards as the Secretariat of ISO Technical Committee (TC) 212, clinical laboratory testing and in vitro diagnostic test systems. This responsibility was delegated to CLSI by the American National Standards Institute (ANSI), an ISO member body. CLSI also serves as the administrator for the US Technical Advisory Committee (TAG) for ISO/TC 212.
Sources: en.wikipedia.org
Oxycodone has a hydroxy group at carbon-14 (codeine has just a hydrogen in its place) Oxycodone has a 7,8-dihydro feature. Codeine has a double bond between those two carbons; and Oxycodone has a carbonyl group (as in ketones) in place of the hydroxyl group of codeine. It is also similar to hydrocodone, differing only in that it has a hydroxyl group at carbon-14.
=== Names === Polatuzumab vedotin is the international nonproprietary name and the United States Adopted Name. Genentech included "Pol" in the generic and trade names in honor of Andy Polson, one of the scientists who discovered the drug.
== Iron malabsorption == Instant coffee decreases intestinal iron absorption more than drip coffee. One study estimated that, when a cup of instant coffee was ingested with a meal composed of semi-purified ingredients, intestinal absorption was reduced from 5.88% to 0.97%, compared to an absorption of 1.64% with drip coffee. It was also estimated that, when the strength of the instant coffee was doubled, intestinal iron absorption fell to 0.53%. However, there is no decrease in iron absorption when instant coffee is consumed 1 hour before a meal, but the same degree of inhibition as with simultaneous ingestion occurs when instant coffee is taken 1 hour after a meal.
The Basuto Gun War, also known as the Basutoland Rebellion, was a conflict between the Basuto and the British Cape Colony. It lasted from 13 September 1880 to 29 April 1881 and ended in a Basuto victory. Following Basutoland's transformation into a British dominion on 12 March 1868, it became the target of rapid westernization efforts by the Cape Colony administration. In 1879, the Cape Parliament extended the Peace Preservation Act to Basutoland, with the aim of disarming the Basuto people. The immense significance of guns in Basuto society, compounded with past grievances, resulted in a rebellion led by chiefs Lerotholi and Masopha, which erupted on 13 September 1880. Heavily outnumbered and stretched thin by the simultaneous outbreak of other revolts, the Cape Colonial Forces failed to achieve a decisive military victory. The ensuing military stalemate and the high cost of conducting the war in made it increasingly unpopular among Cape politicians. On 29 April 1881, High Commissioner for Southern Africa, Sir Hercules Robinson announced the peaceful settlement of the conflict. The Cape's subsequent efforts to enforce disarmament and re-establish the rule of law in Basutoland met with stiff resistance from Masopha and his supporters. Unable to control the Basuto, the Cape Parliament passed the Disannexation Act in September 1883. The Basuto Gun War represents a rare example of an African nation's military victory against a colonial power, whereby the Basuto were able to retain their guns.
Food is used to maintain nourishment or thirst; staying nourished improves certain character attributes, while being hungry or thirsty can negatively impact these attributes. The player also must make sure the character gets rest to maintain these attributes, as well as their fighting performance. The player can gain access to underground safe houses dubbed "Hatches" for recovery, as well as to fast travel between other unlocked safe houses. This is not automatic, however, as the player character must restore the hatch to working order to unlock the hatch fast travel. Wealth can be gained through looting phone boxes, crates, safes, or through bartering with various vendors, where you may also exchange your wealth for various items and delicacies. A core element of We Happy Few is Joy, an addictive hallucinogenic pill used by most of the citizens of Wellington Wells to make them forget the past and be happy. If the player opts to have their character use Joy, they will see the town in a colorful, joyful environment, and will be able to walk through the city without attracting undue attention from its citizens. This allows the player to pass through "Downer Detectors" without raising suspicion, but this does impair some of the character's abilities. As their Joy depletes, the town will revert to its dismal, war-torn state. While the player will have full control of their abilities, they will be seen as a "Downer", a threat to the stability of the people's happiness.
Sources: en.wikipedia.org
=== Red blood cell transfusions === Blood transfusions are the main treatment approach for prolonging life. Donated healthy red blood cells have a functional life of 4 to 6 weeks before they wear out and are broken down in the spleen. Regular transfusions every three to four weeks are necessary in order to maintain hemoglobin at a healthy level. Transfusions come with risks including iron overload, the risk of acquiring infections, and the risk of immune reaction to the donated cells (alloimmunization).
==== Fe2+/α-ketoglutarate-dependent dioxygenase enzymes and TET enzymes ==== α-Ketoglutarate is a cofactor that activates histone-lysine demethylase protein superfamily. This superfamily consists of two groups, the FAD-dependent amine oxidases which do not require α-ketoglutarate for activation and the Fe2+/α-ketoglutarate-dependent dioxygenases (Fe2+ is the ferrous form of iron, i.e., Fe2+). The latter group of more than 30 enzymes is classified into 7 subfamilies termed histone lysine demethylases, i.e., HDM2 to HDM7, with each subfamily having multiple members. These HDMs are characterized by containing a Jumonji C (JmjC) protein domain. They function as dioxygenases or hydroxylases to remove methyl groups from the lysine residues on the histones enveloping DNA and thereby alter the expression of diverse genes. These altered gene expressions lead to a wide range of changes in the functions of various cell types and thereby caused the development and/or progression of various cancers, pathological inflammations, and other disorders (see α-Ketoglutarate-dependent demethylase biological functions). The TET enzymes (i.e., ten-eleven translocation (TET) methylcytosine dioxygenase family of enzymes) consists of three members, TET-1, TET-2, and TET-3. Like the Fe2+/α-ketoglutarate-dependent dioxygenases, all three TET enzymes require Fe2+ and α-ketoglutarate as cofactors to become activated. Unlike the dioxygenases, however, they remove methyl groups from the 5-methylcytosines of DNA sites that regulate the expression of nearby genes.
The addition of milk to tea in Europe was first mentioned in 1680 by the epistolist Madame de Sévigné. Many teas are traditionally drunk with milk in cultures where dairy products are consumed. These include Indian masala chai and British tea blends. These teas tend to be very hearty varieties of black tea which can be tasted through the milk, such as Assams, or the East Friesian blend. Milk is thought to neutralise remaining tannins and reduce acidity. The Han Chinese do not usually drink milk with tea but the Manchus do, and the elite of the Qing Dynasty of the Chinese Empire continued to do so. Hong Kong-style milk tea is based on British habits. Tibetans and other Himalayan peoples traditionally drink tea with milk or yak butter and salt. In Eastern European countries, and in Russia and Italy, tea is commonly served with lemon juice. In Poland, tea is traditionally served with a slice of lemon and is sweetened with either sugar or honey; tea with milk – called a bawarka ("Bavarian style") in Polish – is common. In Australia, tea with milk is known as "white tea". The order of steps in preparing a cup of tea is a much-debated topic and can vary widely between cultures and individuals. Some say it is preferable to add the milk to the cup before the tea, as the high temperature of freshly brewed tea can denature the proteins found in fresh milk, similar to the change in taste of UHT milk, resulting in an inferior-tasting beverage. Others insist it is better to add the milk to the cup after the tea, as black tea is often brewed as close to boiling as possible.
=== Transparent conducting electrodes === Graphene's high electrical conductivity and high optical transparency make it a candidate for transparent conducting electrodes, required for such applications as touchscreens, liquid crystal displays, inorganic photovoltaics cells, organic photovoltaic cells, and organic light-emitting diodes. In particular, graphene's mechanical strength and flexibility are advantageous compared to indium tin oxide, which is brittle. Graphene films may be deposited from solution over large areas. Large-area, continuous, transparent and highly conducting few-layered graphene films were produced by chemical vapor deposition and used as anodes for application in photovoltaic devices. A power conversion efficiency (PCE) up to 1.7% was demonstrated, which is 55.2% of the PCE of a control device based on indium tin oxide. However, the main disadvantage brought by the fabrication method will be the poor substrate bondings that will eventually lead to poor cyclic stability and cause high resistivity to the electrodes. Organic light-emitting diodes (OLEDs) with graphene anodes have been demonstrated. The device was formed by solution-processed graphene on a quartz substrate. The electronic and optical performance of graphene-based devices are similar to devices made with indium tin oxide. In 2017 OLED electrodes were produced by CVD on a copper substrate.
Sources: en.wikipedia.org
It is a synthetic peptide of seven amino acids. Its backbone corresponds to a fragment of adrenocorticotropic hormone extended at the carboxyl end. The material is distributed as a lyophilized solid for laboratory use.
The extension was introduced to slow enzymatic breakdown of the peptide in biological systems. Natural ACTH fragments are degraded rapidly by peptidases. Adding the tripeptide was intended to extend the window during which the molecule remains intact.
Most published work consists of animal experiments conducted in a small number of laboratories. Human data are limited in number and size. Whether the observed effects translate into reliable clinical benefit is still unresolved.
The sequence is Met-Glu-His-Phe-Pro-Gly-Pro, a seven-residue peptide. The first four residues correspond to the ACTH(4-10) fragment, and Pro-Gly-Pro is added at the C-terminus. N-acetylated versions also appear in the literature and differ in mass.