A practical reference on heptapeptide: what it is, how it behaves, what the literature reports, and where the honest uncertainties sit.
Reviewed 2026-02-19. Anything still debated is marked as such rather than presented as settled.
当时的短肽研究普遍关注能否穿越血脑屏障、在低剂量下产生中枢效应，Semax 属于这一路线。鼻内给药是其主要使用方式，俄语文献报道的适应症涵盖缺血性卒中、短暂性脑缺血发作、认知功能减退以及视神经病变。这些研究大多发表在当地期刊上，样本规模与终点设置同西方试验惯例存在差异，国际同行对其临床证据的强度看法不一。
各国监管态度分化明显。俄罗斯按处方药管理，部分东欧国家留有使用记录；欧盟与美国未批准其作为药物上市，市面流通品通常标注为研究用化学品。身份差异意味着标示含量、纯度与无菌性缺少统一核查。体育领域还牵涉反兴奋剂名录，跨境携带则受目的地药品法规约束。
Semax is a synthetic heptapeptide with the sequence Met-Glu-His-Phe-Pro-Gly-Pro. It is described in the literature as an analogue of the ACTH(4–10) fragment, a short N-terminal portion of adrenocorticotropic hormone that retains some neurotropic activity without the full hormonal effects of the parent peptide. The molecule carries a methionine residue at the N-terminus and two proline residues near the C-terminus, features that shape both its interactions with receptor systems and its chemical stability. The free peptide corresponds to the formula C37H51N9O10S and a molecular mass near 813.9 Da.
The compound was developed in the 1980s at the Institute of Molecular Genetics in Moscow, where it emerged from research on short ACTH fragments and their effects on the central nervous system. Russian pharmaceutical listings describe it as a nootropic and neuroprotective agent, most often formulated as nasal drops. It is not a marketed medicine in the United States or the European Union, and no pharmacopoeial monograph covers it. Consequently, most published clinical experience with the substance originates from a small number of research centres, mainly in Russia and neighbouring countries.
| Property | Value | Notes |
|---|---|---|
| 结构类别 | 线性合成七肽 | 无环化结构，不含二硫键 |
| 氨基酸序列 | Met-Glu-His-Phe-Pro-Gly-Pro | N 端为甲硫氨酸 |
| 分子量 | 约 814 Da | 游离碱形式的计算值 |
| 外观 | 白色至类白色粉末 | 具吸湿性 |
| 溶解性 | 易溶于水 | 亦可溶于甲醇等极性溶剂 |
== Uses == Alpha emitters are used in smoke detectors. The alpha particles ionize air in an open ion chamber and a small current flows through the ionized air. Smoke particles from the fire that enter the chamber reduce the current, triggering the smoke detector's alarm. Radium-223 is also an alpha emitter. Its use has been trialed with successful results in treating bone metastasis resulting from Castration-resistant metastatic prostate cancer. Alpha decay can provide a safe power source for radioisotope thermoelectric generators used for space probes and were used for artificial heart pacemakers. Alpha decay is much more easily shielded against than other forms of radioactive decay. Static eliminators typically use polonium-210, an alpha emitter, to ionize the air, allowing the "static cling" to dissipate more rapidly.
== Opinion polls == In 2005 Forschungsgruppe Wahlen researcher Matthias Jung, who was involved in organising opinion polling for the election, spoke of the difficulties of the task. He attributed this to the unpredictable behaviour of the electorate as well as the total lack of infrastructure and methods for gauging public opinion, which forced the institute to build an entirely new polling model. Despite beginning work at the end of 1989, FW only released one poll before the election, which Jung claimed accurately predicted the CDU victory. This may refer to a FW poll showing that 35% of voters believed an Alliance for Germany-led government would be most capable of solving the country's problems, while only 27% believed an SPD-led government would; 29% believed a grand coalition would be most capable. This starkly contrasted with other polls, conducted without reliable methods, which predicted a landslide SPD victory.
=== Aviation === In 2016, researchers developed a prototype de-icing system that incorporated unzipped carbon nanotube graphene nanoribbons in an epoxy/graphene composite. In laboratory tests, the leading edge of a helicopter rotor blade was coated with the composite, covered by a protective metal sleeve. Applying an electrical current heated the composite to over 200 °F (93 °C), melting a 1 cm (0.4 in)-thick ice layer with ambient temperatures of a -4 °F (-20 °C).
Sources: en.wikipedia.org
=== Critical reviews === "You Hurled Me Into the Depths, Into the Very Heart of the Seas" received mostly positive reviews from critics. Matt Schimkowitz of The A.V. Club gave the episode an "A–" grade and wrote, "Not to be hyperbolic, but tonight's Righteous Gemstones was the funniest 36 minutes in television history. Okay, I won't go that far, but it was a series high. There wasn't a single punchline that didn't hit, a costume choice (or lack thereof) that wasn't a godsend, or a needle drop that was out of place. “You Hurled Me Into the Depths, Into the Very Heart Of The Seas” launches the final season's story out of the deep and finds the production confidently and hilariously ascending toward that big disco ball in the sky." Scott Tobias of Vulture gave the episode a 4 star rating out of 5 and wrote, "As lowbrow laughs go, there's nothing funnier than full-frontal male nudity, and there's certainly no funnier moment than Baby Billy dropping his drawers in front of the Gemstones in the dressing room after their rehearsal goes awry. “Behold, look at this.
When Noriega created the PDF in 1983, he brought into its control Panama's customs and immigration apparatus, as well as the country's whole transportation network. This expansion of the military's role occurred simultaneously with a large growth in the cocaine trade, as well as in markets for weapons in various military conflicts in Central America. The profits the military reaped from these activities gave Noriega's military regime considerable financial clout. Noriega took control of most major newspapers by either buying a controlling stake in them or forcing them to shut down. The government also harassed, intimidated, or exiled individual journalists and editors. The newspaper La Prensa, which remained independent and was frequently critical of Noriega, had its staff intimidated and its offices damaged; eventually, it too was forced to close. In May 1984, Noriega allowed the first presidential elections in 16 years. Noriega and Díaz Herrera picked Nicolás Ardito Barletta Vallarino to be the PRD's candidate, with the intention of keeping him under close control. When the initial results showed Arias, who had the support of much of the opposition, on his way to a landslide victory, Noriega halted the count. After brazenly manipulating the results, the government announced that Barletta had won by a slim margin of 1,713 votes. Independent estimates suggested that Arias would have won by as many as 50,000 votes had the election been conducted fairly. More than 60,000 votes were not included in the final count.
=== Psychotropic effects === Bromantane is described primarily as a mild stimulant and anxiolytic. It is also said to possess anti-asthenic properties. Bromantane is reported to improve physical and mental performance, hence it could be considered a performance-enhancing drug. Bromantane has been found to lower the levels of pro-inflammatory cytokines IL-6, IL-17 and IL-4 and to normalize behavior in animal models of depression, and may possess clinical efficacy as an antidepressant. It has also been found to increase sexual receptivity and proceptivity in rats of both sexes, which was attributed to its dopaminergic actions. It has been proposed that bromantane may suppress prolactin levels by virtue of its dopaminergic properties as well. Bromantane has been found to "agonize" amphetamine-induced stereotypies in vivo, suggesting that it might potentiate certain effects of other stimulants. The stimulant effects of bromantane onset gradually within 1.5–2 hours and last for 8–12 hours when taken orally.
Sources: en.wikipedia.org
不存在。它是依据 ACTH 的一段序列人工设计的分子，天然蛋白质中找不到与之完全相同的七肽。名称属于研究代号，而非天然物质名。
Semax 对应 ACTH 第 4 至第 10 位的片段，并在两端做了替换与延长，使其不再具备促肾上腺皮质激素的典型内分泌活性。这一改动同时改变了它在体内的稳定性与分布特征。
俄罗斯将其列为处方药物，需要医生开具处方。多数其他国家把它当作研究化合物，不能作为药品销售或宣称疗效。具体合法性取决于当地法规。
It is described as a synthetic analogue of the ACTH(4–10) fragment, a short segment of adrenocorticotropic hormone. Its sequence differs from that fragment and includes two proline residues, which influence stability and behaviour in solution.