If you have been reading about lyophilized and want a single page that covers the useful parts, this is it: definitions, context, how it is studied, and the questions that come up repeatedly.
Updated 2025-08-23. Numbers and descriptions here follow the published literature rather than marketing material.
Pharmacokinetic data are limited. Like most short peptides, Selank is vulnerable to plasma and tissue peptidases, and its measured half-life in circulation is short, on a minutes scale. The Pro-Gly-Pro tail slows this degradation but does not eliminate it. Intranasal administration is the route described in most reports, with absorption through the nasal mucosa and a hypothesized path into the central nervous system that avoids the blood-brain barrier. Direct measurements of human brain exposure are unavailable, so distribution claims rest on inference from animal work.
Clinical evidence comes mainly from small studies conducted in Russia, several of which were open-label or lacked robust blinding. Reported outcomes include lower anxiety scores, changes in attention measures, and effects on asthenic states following illness. Sample sizes are typically in the tens of participants, and independent replication outside the region is scarce. Reviews published in English generally note the limited methodological quality of the underlying trials. Whether the compound produces clinically meaningful effects under rigorous conditions remains unresolved.
Characterization of Selank in a laboratory setting relies on standard peptide methods. Reverse-phase high-performance liquid chromatography separates the target from related impurities and provides a purity figure, commonly reported as 95 percent or higher. Mass spectrometry, typically electrospray ionization or matrix-assisted laser desorption, confirms the molecular mass and helps detect truncation or modification. Amino acid analysis can verify composition when a sequence-level check is needed. These techniques together establish identity and purity for a given lot.
Lyophilized Selank, the dry powder form, is generally stored frozen at minus 20 degrees Celsius or colder for long-term keeping. The solid is hygroscopic and should stay sealed, dry, and protected from light. Once dissolved, the peptide is less stable and is usually held refrigerated at 2 to 8 degrees Celsius for short periods. Repeated freezing and thawing is avoided because it can promote aggregation and loss of activity. Buffers and pH choice also affect how long a solution remains usable.
Solubility behavior is a practical concern for handling. Selank dissolves readily in water and in common aqueous buffers, which simplifies preparation of working solutions. The choice of solvent, ionic strength, and pH can influence aggregation over time, particularly at higher concentrations. Aqueous solutions are typically sterile-filtered before use. Because stability depends on several variables, storage and handling notes should be treated as general guidance rather than fixed rules, and specific values are best confirmed against a certificate of analysis for each batch.
| Property | Value | Notes |
|---|---|---|
| Route studied | Intranasal | Predominant route in published reports |
| Circulation stability | Short, minutes scale | Peptidases cleave it; the tail slows the process |
| Analytical method | RP-HPLC with mass spectrometry | Used for identity and purity assessment |
| Reported outcome domains | Anxiety and cognitive measures | Derived from small, mostly regional trials |
| Regulatory status | Marketed in Russia | Availability outside that market is limited |
Proposed mechanisms centre on the GABAergic system. Animal and tissue studies report changes in GABA-A receptor expression and reduced activity of GABA transaminase, the enzyme that degrades GABA. Effects on monoamine turnover, including serotonin and dopamine pathways, are also described, and a separate line of work links the peptide to increased expression of brain-derived neurotrophic factor in hippocampal tissue. Most of these findings come from rodent models and cell preparations. How the individual observations combine into a single coherent mode of action is not settled.
Pharmacokinetic data are sparse and largely derived from animal work. After intranasal administration the peptide appears in plasma within minutes, and reported half-lives are short, on the order of minutes to tens of minutes. Degradation proceeds through ordinary proteolytic cleavage into constituent amino acids and smaller fragments. Direct evidence that intact Selank reaches brain tissue in meaningful amounts is limited, and the extent of blood-brain barrier penetration is debated. Some authors argue that fragments, not the parent peptide, carry much of the observed activity.
Published clinical work is concentrated in Russian-language journals and generally involves small samples without independent replication. Systematic reviews in English note the shortage of randomised, placebo-controlled trials and the difficulty of verifying methods from translated reports. Outcome measures vary between studies, which complicates pooling of results. Interest in the compound as a cognitive or anxiolytic agent therefore rests on a thinner evidence base than the volume of citations suggests. Replication in well-powered trials with preregistered endpoints would be needed before firm conclusions about efficacy can be drawn.
The compound has a calculated molecular weight near 751.9 daltons and carries a net positive charge at physiological pH because of its arginine residue. It dissolves freely in water and in common aqueous buffers, and typically appears as a white or off-white lyophilized powder. The amide backbone makes the molecule susceptible to peptidases, which limits oral use and favors intranasal or parenteral routes. Nomenclature in the literature varies: the substance is also described by the sequence abbreviation TP-7 and by a Russian trade designation.
Regulatory status differs sharply by region. Selank holds a Russian marketing authorization, where it is supplied mainly as nasal drops, while authorities elsewhere have not approved it for medical use. Material sold internationally is therefore usually labeled as a research chemical rather than a medicine. Peer-reviewed publications come predominantly from Russian laboratories, and sample sizes are generally small. Whether the compound produces comparable effects under independent, well-controlled replication remains an open question that the broader literature has not settled.
=== Slaughter by the consumer === Insects may also be sold live for food purposes, and thus effectively slaughtered by the end human consumer prior to eating. Some "how to" guides for eating insects make no mention of freezing or other euthanasia methods. For example, Miles Olson's recommendations include:
A trial with the primary objective of showing that the response to two or more treatments differs by an amount which is clinically unimportant. This is usually demonstrated by showing that the true treatment difference is likely to lie between a lower and an upper equivalence margin of clinically acceptable differences. (ICH E9) Essential Documents
On 17 October 1970 Rose gave birth to their first child, a daughter they named Heather Ann. (Speculation remains that Heather may have been sired by Rose's own father.) Two months later, Fred was imprisoned for the theft of car tyres and a vehicle tax disc. He remained imprisoned until 24 June 1971. As he served this six-and-a-half-month sentence, Rose, having just turned 17, looked after the three girls, with Charmaine and Anne Marie being told to refer to Rose as their mother. According to Anne Marie, she and Charmaine were frequently subjected to extensive physical and emotional abuse throughout the time they lived under Rose's care at Midland Road. Although Anne Marie was generally submissive and prone to display emotion in response to the abuse, Charmaine repeatedly infuriated Rose by her stoic refusal to either cry or display any sign of grief or servitude, no matter how severely she was treated. Despite the years of neglect and abuse, Charmaine's spirit had not been broken and she talked wistfully to Anne Marie of the belief she held that "mummy will come and save me." Anne Marie later recollected her sister repeatedly antagonised Rose by making statements such as, "My real mummy wouldn't swear or shout at us," in response to Rose's scathing language.
Sources: en.wikipedia.org
On 15 July, three more insurgents were killed under Operation Shaban bringing the death toll so far to 126 whereas a VBIED attack on the Miryan Police Station in Bannu District was foiled before it could reach the target, however one cop was killed and six were injured, four civilians were also wounded, later it was reported that four IMP insurgents were killed during the attack and that the suicide bomber was an Afghan from Paktia Province. An attack on a military post in Shalozan Tangi area of Kurram District left seven soldiers injured as well as multiple casualties among the attackers. Four dead bodies of active duty and ex-security personnel were also recovered from Harnai District while three explosions were also reported at a Mari Gas Company site near Koh e Khalifat. On 16 July, an ambush on a police convoy in Upper Dir District left three policemen dead and 15 injured, five insurgents were also killed in an operation in Laram area of Lower Dir District. Three more insurgents were also killed under Operation Shaban bringing the toll to 129. A suicide attack on a military post in Wana was foiled with four insurgents being killed. A military operation was initiated in multiple areas of Bannu District with a facilitator of the previous day's VBIED attack being captured. On 17 July, ISPR claimed that Pakistani forces had killed 24 TTP insurgents in Bannu District during comprehensive operations while IMP issued a warning against travel in Bannu District as it had planted landmines during the military operation.
They assert that since the front wall of the vagina is inextricably linked with the internal parts of the clitoris, stimulating the vagina without activating the clitoris may be next to impossible. In their 2009 published study, it states the "coronal planes during perineal contraction and finger penetration demonstrated a close relationship between the root of the clitoris and the anterior vaginal wall". Buisson and Foldès suggested "that the special sensitivity of the lower anterior vaginal wall could be explained by pressure and movement of clitoris' root during a vaginal penetration and subsequent perineal contraction". Researcher Vincenzo Puppo, who, while agreeing that the clitoris is the center of female sexual pleasure and believing that there is no anatomical evidence of the vaginal orgasm, disagrees with O'Connell and other researchers' terminological and anatomical descriptions of the clitoris (such as referring to the vestibular bulbs as the "clitoral bulbs") and states that "the inner clitoris" does not exist because the penis cannot come in contact with the congregation of multiple nerves/veins situated until the angle of the clitoris, detailed by Georg Ludwig Kobelt, or with the root of the clitoris, which does not have sensory receptors or erogenous sensitivity, during vaginal intercourse. Puppo's belief contrasts the general belief among researchers that vaginal orgasms are the result of clitoral stimulation; they reaffirm that clitoral tissue extends, or is at least stimulated by its bulbs, even in the area most commonly reported to be the G-spot.
A review of four studies on the effectiveness of mindfulness-based cognitive therapy (MBCT), a recently developed class-based program designed to prevent relapse, suggests that MBCT may have an additive effect when provided with the usual care in patients who have had three or more depressive episodes, although the usual care did not include antidepressant treatment or any psychotherapy, and the improvement observed may have reflected non-specific or placebo effects. Of note, although Mindfulness-based cognitive therapy for depression prevented relapse of future depressive episodes, there is no research on whether it can cause the remission of a current depressive episode. Interpersonal psychotherapy (IPT) focuses on the social and interpersonal triggers that may cause depression. There is evidence that it is an effective treatment for depression. Here, the therapy takes a fairly structured course (often 12 sessions, as in the original research versions) as in the case with CBT; however, the focus is on relationships with others. Unlike family therapy, IPT is an individual format, so it is possible to work on interpersonal themes even if other family members do not come to the session. Therapy can be used to help a person develop or improve interpersonal skills in order to allow him or her to communicate more effectively and reduce stress. In a meta-analysis of 16 studies and 4,356 patients, the average improvement in depressive symptoms was an effect size of d = 0.63 (95% CI, 0.36 to 0.90).
Sources: en.wikipedia.org
== Application as a biochemical tool == One of the main uses of this protein is for removing affinity tags from purified recombinant fusion proteins. The reason for the use of TEV protease as a biochemical tool is its high sequence specificity. This specificity allows for the controlled cleavage of proteins when the preference sequence is inserted into flexible loops. It also makes TEV protease relatively non-toxic in vivo as the recognized sequence scarcely occurs in proteins. Although rational design has had limited success in changing protease specificity, directed evolution has been used to change the preferred residue either before or after the cleavage site. In recent developments, a next-generation TEV protease variant called Numacut has been engineered using a combination of AI-guided rational design, allosteric network analysis, and smart mutagenesis. This variant demonstrates efficient and scarless cleavage at ENLYFQ↓X motifs, where virtually all amino acids (except proline) are tolerated in the P1' position, significantly expanding its biotechnological applicability. However, TEV protease does have limitations as a biochemical tool. It is prone to deactivation by self-cleavage (autolysis), though this can be abolished through a single S219V mutation in the internal cleavage site. The protease expressed alone is also poorly soluble, however several attempts have been made to improve its solubility through directed evolution and computational design.
"Ellerman's Labor Theory of Property and the Injustice of Capitalist Exploitation". Review of Social Economy. 59 (2): 161–183. doi:10.1080/00346760110035572. JSTOR 29770104. S2CID 144866813. Devine, Pat (November 1, 1993). "Review: Property and Contract in Economics". Economic Journal. 103 (421): 1560–1561. doi:10.2307/2234490. JSTOR 2234490. Lawson, Colin (1993). "Review: Property and Contract in Economics". The Slavonic and East European Review. 71 (4): 792–793. JSTOR 4211433. Lutz, Mark A. (1995). "Book Reviews: Property and Contract in Economics". Review of Social Economy. 53 (1): 141–147. doi:10.1080/00346769500000007. Pole, J. R. (June 1977). "Review: Slavery and Revolution: The Conscience of the Rich". The Historical Journal. 20 (2): 503–513. doi:10.1017/S0018246X00011171. JSTOR 2638543. S2CID 162624457. Smith, Stephen C. (December 1994). "Property and Contract in Economics". Journal of Comparative Economics. 19 (3): 463–466. doi:10.1006/jcec.1994.1115. Woltjer, Geert (March 1996). "Book review: Property and Contract in Economics". European Journal of Law and Economics. 3 (1): 109–112. doi:10.1007/bf00149085. S2CID 195243866.
== Halal tourism == The Global Muslim Travel Index 2019 (GMTI) ranked Thailand 18th of 130 preferred destinations worldwide for Muslim tourists. Islamic ASEAN nations led the rankings: Malaysia is ranked number 1; Indonesia, 2; Brunei, 10. Among non-Muslim ASEAN nations, Singapore ranked 10; Thailand, 18; and the Philippines, 36.
=== Support of Alan L. Hart === Lawrence played a supportive role in the early career of physician and radiologist Alan L. Hart. Following Hart’s transition in 1917, she provided professional advocacy and a written recommendation that helped him secure a medical appointment at the Albuquerque Sanatorium.
Sources: en.wikipedia.org
Reports describe effects on GABA-A receptor expression, monoamine turnover, and neurotrophic factor levels. These are proposed mechanisms drawn mainly from animal models. No single molecular target has been established.
Intranasal delivery is the route described in most published work. It is used because the peptide is degraded quickly once it reaches circulation. Direct evidence of brain penetration in humans is lacking.
Most trials are small, regionally concentrated, and often lack rigorous blinding or placebo control. Independent replication is limited. Reviews in English generally rate the evidence as preliminary.
Reverse-phase HPLC is the usual method and gives a percentage purity value. Mass spectrometry then confirms the molecular mass. Together they provide a basic identity and purity profile for a lot.