A practical reference on intranasal delivery: what it is, how it behaves, what the literature reports, and where the honest uncertainties sit.
Reviewed 2025-08-27. Anything still debated is marked as such rather than presented as settled.
Claims about enhanced focus, memory, or mood in healthy people rest mostly on anecdotal reports and community discussion rather than on controlled data. It remains unclear whether any cognitive benefit observed in patients recovering from brain injury would extend to uninjured users. Dose-response relationships, long-term safety, and interactions with other drugs are not well characterized in the peer-reviewed literature. Questions about optimal route of administration and treatment duration likewise remain open.
Semax binds to melanocortin receptors and is thought to influence neuronal survival and plasticity rather than to act through the adrenal axis. Laboratory work has shown increased expression of brain-derived neurotrophic factor and nerve growth factor in treated tissue. Changes in c-Fos, a marker of neuronal activation, have also been reported. Because the peptide is rapidly degraded by peptidases, its effects are generally attributed to downstream signaling cascades rather than to sustained receptor occupancy.
Published studies examine a fairly narrow set of endpoints. Rodent experiments commonly measure maze learning, infarct volume after induced ischemia, and tissue levels of neurotrophic factors. Clinical reports from Russian centres describe attention, memory and recovery scores in patients after stroke or transient ischemic attack. Most of those human studies are small and few have been repeated by independent groups. Outcome measures differ between studies, which limits direct comparison.
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.
| Property | Value | Notes |
|---|---|---|
| Appearance | White lyophilized powder | Typical for synthetic peptides |
| Solubility | Freely soluble in water | Also soluble in saline |
| Storage temperature | -20 C or below | Protect from repeated freeze-thaw |
| Analytical method | Reverse-phase HPLC | Confirms purity and identity |
| Common synonym | ACTH(4-10) analog | Reflects structural origin |
Proposed mechanisms center on neurotrophic signaling rather than on classical melanocortin receptor activation. Rodent experiments have reported shifts in the expression of brain-derived neurotrophic factor and nerve growth factor after administration, together with changes in the associated receptor systems. Several authors argue that the peptide acts largely through its degradation products and their interaction with peptidergic pathways, but this remains a hypothesis rather than a settled finding. No single molecular target has been identified in a way that the field broadly accepts.
Published research covers ischemic stroke, traumatic brain injury, cognitive impairment, optic nerve conditions and attention-related measures. Much of the human evidence comes from small trials conducted in one country, which limits how far the results generalize. Animal models supply the larger share of the data, and effects seen in rodents do not transfer automatically to people. Reviews have noted that methodological reporting is often incomplete, making it difficult to pool results or compare treatment schedules across studies.
For example in the United States, bills on cosmetics, food packaging, and textiles meant to regulate PFAS failed to pass through Congress in 2022. In 2026, the UK increased testing for PFAS as part of a national plan to tackle the substances, which have prompted environmental and health concerns. The government says that by 2029 it wants to align more closely with regulations issued by the EU, which is looking to prohibit all non-essential uses.
At least eighteen people were killed and at least 78 others were injured in a Russian missile attack on Chernihiv. Ukraine claimed responsibility for an attack at the Dzhankoi air base in Crimea, during which six explosions were reported. Russian milbloggers and Ukrainian sources said that ATACMS missiles or ballistic missiles were used, some of which deployed cluster munitions. A milbloggers claimed 30 people were killed and 80 others wounded. Ukraine said four missile launchers were 'critically damaged' in the attack. Subsequent satellite pictures showed the destruction of between three and five S-300 or S-400 systems and other areas marked with "scorch marks" that suggested equipment that had been damaged but removed. Ukrainian media reported that the HUR struck a radar system in the Russian republic of Mordovia and a factory producing bomber aircraft in Tatarstan using drones. The Canadian government announced that it would budget some 1.6 billion Canadian dollars ($1.16 billion) in military aid for Ukraine over the next five years.
Conway became the chairman of Anthrocon in 1999, after his invitation as a guest of honor in 1998. Under his leadership, Anthrocon was incorporated and moved to Philadelphia. The convention's attendance grew from 842 to 2,489 over the period from 1999 to 2006, necessitating a further move to Pittsburgh; 3,390 attended in 2008. Conway is the public face of Anthrocon, responsible for public relations, negotiating hotel contracts, managing finances, damage control and other activities before, during and after the convention. He also talks to fans about presenting furry fandom to the public.
=== Features === The project led by MSRDC will observe international road design and safety standards, with an intelligent highway management system for traffic surveillance. The expressway is designed for a top speed of 150 km/h on plain terrain and 120 km/h on hilly terrain, even though the legal speed limit remains at 120 km/h for cars and 80 km/h for trucks, enforceable by CCTV cameras, making it the fastest road network in the country, which will cut down the travel time between the two cities to eight hours from the present 16-hour. The Super Communication Expressway will considerably contribute to the 6% to the national trunk and freight infrastructure. Nearly 36% of the state population will observe the Samruddhi Corridor as a substantial growth driver, putting a direct positive impact on their livelihood. The MSRDC has been authorized as a nodal agency, the New Town Development Authority (NTDA), for developing 19 new townships along the route, which will include state-of-the-art healthcare facilities, skill development centers, IT parks, and educational institutions. The expressway will pass through 3 wildlife sanctuaries, including a 29.6 km passage through the Katepurna Wildlife Sanctuary in Akola, 29.15 km through the Karanja-Sohol Black Buck Sanctuary in Washim, and 44.975 km through the Tansa Wildlife Sanctuary in Thane. The Mumbai–Nagpur Expressway has been envisioned to ensure zero fatalities, and will have CCTVs and free telephone booths at every 5 km interval in case of an emergency.
Sources: en.wikipedia.org
=== Agriculture === Natural freshwater diatomaceous earth is used in agriculture for grain storage as an anticaking agent, as well as an insecticide. It is approved by the U.S. Food and Drug Administration as a feed additive to prevent caking. Some believe it may be used as a natural anthelmintic (dewormer), although studies have not shown it to be effective. Some farmers add it to their livestock and poultry feed to prevent the caking of feed. "Food-Grade Diatomaceous Earth" is widely available in agricultural feed supply stores. Freshwater diatomite can be used as a growing medium in hydroponic gardens. It is also used as a growing medium in potted plants, particularly as bonsai soil. Bonsai enthusiasts use it as a soil additive, or pot a bonsai tree in 100% diatomaceous earth. In vegetable gardening it is sometimes used as a soil conditioner, because like perlite, vermiculite, and expanded clay, it retains water and nutrients, while draining fast and freely, allowing high oxygen circulation within the growing medium.
Even during digestion, in general, one or two hours following a meal, insulin release from the pancreas is not continuous, but oscillates with a period of 3–6 minutes, changing from generating a blood insulin concentration more than about 800 p mol/l to less than 100 pmol/L (in rats). This is thought to avoid downregulation of insulin receptors in target cells, and to assist the liver in extracting insulin from the blood. This oscillation is important to consider when administering insulin-stimulating medication, since it is the oscillating blood concentration of insulin release, which should, ideally, be achieved, not a constant high concentration. This may be achieved by delivering insulin rhythmically to the portal vein, by light activated delivery, or by islet cell transplantation to the liver.
=== Preregistration === Orenetide (BP-101; BP101; Libicore; Desirix) – undefined mechanism of action (synthetic small peptide) – female sexual dysfunction [1] [2] Tadalafil oral film (AQST-119; Exordia) – phosphodiesterase PDE5 inhibitor – erectile dysfunction [3] Tadalafil oral film (Exordia; INT-007; INT0007; INT0007/2006) – phosphodiesterase PDE5 inhibitor – erectile dysfunction [4]
Sources: en.wikipedia.org
This activity was used to determine and isolate cell-permeable inhibitors of PTPs that could be used as potential drugs later on, for example, working on CD45 and Bacillus anthracis. Related to this work on PTPs, in 2006, Barrios and Sayantan Mitra filed a patent for "Coumarin-based amino acids for used in enzyme activity and substrate specificity assay" which can be incorporated into peptides to visualize the hydrolyzation of PTPs. Additionally, in 2009, Barrios, Mitra, Stephanie Stanford, and Nunzio Bottini filed a patent for a "Method for monitoring intracellular tyrosine phosphatase activity". This invention was based on the CD45 probe used in the previously mentioned tyrosine phosphatases and is used to monitor "intracellular tyrosine dephosphorylation at the single-cell level" and the potential development of novel therapeutics. As assistant professor of Medicinal Chemistry at the University of Utah in 2012, Barrios worked on a drug to target a parasite known as Entamoeba histolytica. This parasite causes amebiasis which was the fourth leading cause of death world-wide caused by protozoan infections. Metronidazole, the drug that was being used at the time, had adverse side effects and some resistance to the medication was on the rise. Barrios contributed to the development of a new anti-parasitic drug. Through a high-throughput drug screen, they found that auranofin, which is commonly used for rheumatoid arthritis, targets TrxR which decreases the parasite's ability to withstand oxidative stress.
==== Land ==== The Peak Tram, Hong Kong's first public transport system, has provided funicular rail transport between Central and Victoria Peak since 1888. The Central and Western District has an extensive system of escalators and moving pavements, which, together with the Mid-Levels escalator system, is the world's longest outdoor covered escalator system. Hong Kong Tramways' tram network covers a portion of Hong Kong Island, covering from Kennedy Town to Shau Kei Wan, with a branch to Happy Valley. It operates 6 routes and has had a ridership of 42,558 in 2022. It began servicing Hong Kong since 1904. Hong Kong Tramways currently holds the Guinness World Record as the "Largest double-decker tram fleet in service", certified on 30 July 2021, with a fleet of 165 double-decker trams. The fleet of trams was mostly built by Hong Kong Tramways.
== Ecology == Many cnidarians are limited to shallow waters because they depend on endosymbiotic algae for much of their nutrients. The life cycles of most have polyp stages, which are limited to locations that offer stable substrates. Nevertheless, major cnidarian groups contain species that have escaped these limitations. Hydrozoans have a worldwide range: some, such as Hydra, live in freshwater; Obelia appears in the coastal waters of all the oceans; and Liriope can form large shoals near the surface in mid-ocean. Among anthozoans, a few scleractinian corals, sea pens and sea fans live in deep, cold waters, and some sea anemones inhabit polar seabeds while others live near hydrothermal vents over 10 km (33,000 ft) below sea-level. Reef-building corals are limited to tropical seas between 30°N and 30°S with a maximum depth of 46 m (151 ft), temperatures between 20 and 28 °C (68 and 82 °F), high salinity, and low carbon dioxide levels. Stauromedusae, although usually classified as jellyfish, are stalked, sessile animals that live in cool to Arctic waters. Cnidarians range in size from a mere handful of cells for the parasitic myxozoans through Hydra's length of 5–20 mm (1⁄4–3⁄4 in), to the lion's mane jellyfish, which may exceed 2 m (6 ft 7 in) in diameter and 75 m (246 ft) in length. Prey of cnidarians ranges from plankton to animals several times larger than themselves. Some cnidarians are parasites, mainly on jellyfish but a few are major pests of fish. Others obtain most of their nourishment from endosymbiotic algae or dissolved nutrients.
The VIP gets 200 armor and has 150% movement speed; they also have a unique skin for identification purposes. Formerly, there was a fourth objective called Escape. In this scenario, the terrorist team had to "escape" to a designated escape point while the Counter-Terrorist team tried to kill them. When half of the team has managed to escape, the Terrorists win the round. Following each of the eight rounds of play, the two sides will trade roles. If one team eliminates the other, either team can win the scenario. A heads-up display (HUD) shows information to assist players during gameplay. The action indicator in the top right displays the names of players who are killed and the weapon used. The radar, or mini-map, shows the positions of teammates and other relevant map details. The HUD displays the player's health, armor, ammunition, and money as well as the round timer. On the left side, icons indicate important locations such as hostage rescue areas, VIP escape points, buy zones, and bomb sites, and in bomb defusal maps, it shows whether the player is carrying the C4 bomb or a defuse kit. There are three categories of weapons: melee (knife), secondary (handguns), and primary (rifles, shotguns, machine guns, and submachine guns). Players are only allowed to carry one weapon of each category at a time. There is a separate category for equipment like defusing kits and hand grenades which do not have the same carry limits.
Sources: en.wikipedia.org
It is associated with the melanocortin receptor family, particularly subtypes found in the central nervous system. This interaction is separate from the adrenal pathway activated by full-length ACTH.
Peptidases degrade the compound within minutes in circulation. This short half-life is one reason nasal delivery is used, placing the substance close to the olfactory and trigeminal pathways.
No large multicenter trials have been published in English-language journals. The existing human evidence consists mainly of smaller studies conducted in Russia, which limits generalization.
It consists mainly of animal experiments and small clinical reports, with much of the clinical material published in Russian-language journals. Large independent trials are scarce. Separating reliable effects from chance findings is consequently difficult.