This is a working overview of Insulin-like growth factor 1, written for readers who want more than a one-paragraph summary but less than a textbook.
Reviewed 2026-07-18. Anything still debated is marked as such rather than presented as settled.
Storage claims vary across suppliers, and published stability data for specific formulations are limited. Extrapolating from related peptides is common but not a substitute for direct measurement. For research use, documentation such as a certificate of analysis is often requested to confirm identity and purity. What constitutes an acceptable purity threshold depends on the intended application. Open questions remain about how temperature excursions during shipping affect long-term peptide integrity. Independent verification by an end user is not routinely reported.
Lyophilized tesamorelin is generally stored refrigerated at 2 to 8 degrees Celsius, protected from light and moisture. Peptides in this class are often kept frozen at minus 20 degrees Celsius for longer periods. Reconstituted solutions are typically used within a defined window because hydrolysis and oxidation proceed faster in liquid form. Container material and headspace also influence how long a preparation retains its expected profile. Specific stability figures depend on concentration and buffer composition.
在临床研究之外，特沙莫瑞林常被讨论为生长激素分泌促进剂，但这一说法需要限定。它并不等同于生长激素本身，也不属于普通减重药物。部分研究关注其减少腹部脂肪和改善脂质谱的潜力，另一些研究则关注胰岛素抵抗和 IGF-1 升高等信号。这些效应的临床意义仍在评估中，尚未形成统一结论。
特沙莫瑞林是一种合成肽，其序列与人生长激素释放激素的 44 个氨基酸形式相关。它在 N 端带有反式-3-己烯酰基修饰，这一改动可减缓二肽基肽酶 IV 的降解。该化合物属于生长激素释放激素受体激动剂，可刺激垂体释放生长激素。研究文献通常将其归入合成肽类药物，而非小分子化合物。
| Property | Value | Notes |
|---|---|---|
| Physical form | Lyophilized powder | Requires reconstitution before use |
| Solubility | Soluble in water | Also dissolves in aqueous buffers |
| Storage, powder | 2 to 8 degrees Celsius | Protect from light and moisture |
| Storage, solution | Refrigerated, short term | Use promptly after reconstitution |
| Common assays | Reversed-phase HPLC and mass spectrometry | Purity and identity respectively |
Whether the drug improves hard clinical outcomes is not settled. No completed trial has shown a reduction in heart attacks or strokes among treated patients, although a dedicated cardiovascular outcomes study has been discussed in the literature. Investigators have also examined hepatic fat in people with HIV and fatty liver disease, cognitive measures in small cohorts, and changes in bone density. Regulatory labeling emphasizes monitoring of insulin-like growth factor 1 because supraphysiologic levels raise questions about tissue growth, and the clinical significance of that signal remains an open question rather than a demonstrated harm.
Binding of tesamorelin to the growth hormone-releasing hormone receptor on anterior pituitary somatotrophs activates a Gs protein pathway, raises cyclic AMP, and triggers release of stored growth hormone into the bloodstream. Because the analogue resists dipeptidyl peptidase-4, its plasma residence time exceeds that of native GHRH, producing a larger and more sustained secretory signal. The released growth hormone then acts on the liver and peripheral tissues to raise insulin-like growth factor 1, which feeds back on the hypothalamus and pituitary. This axis explains both the intended effects on fat distribution and the biological markers used to track them.
Studies of the compound rely on imaging and laboratory endpoints rather than on symptoms alone. Visceral adipose tissue is usually quantified by computed tomography or magnetic resonance imaging at the level of the abdomen, with waist circumference serving as a cheaper but less specific proxy. Blood work tracks insulin-like growth factor 1, fasting glucose, glycated hemoglobin, and lipid fractions. In the pivotal trials the imaging endpoint fell by roughly fifteen to twenty percent over six months, subcutaneous fat changed little, and the visceral fat returned toward baseline after treatment stopped, a pattern that shapes how clinicians discuss durability.
Several related peptides act on the same receptor, including sermorelin, a shorter GHRH fragment, and modified analogs such as CJC-1295 and modified GRF(1-29) that are common in research settings rather than approved products. Tesamorelin differs from growth hormone itself in that it acts upstream, prompting the pituitary to release the hormone through physiological signaling rather than supplying it directly. Terminology in the literature distinguishes GHRH analogs, growth hormone secretagogues, and recombinant growth hormone, although popular discussion often blurs these categories together. Precise naming matters when comparing study results.
Tesamorelin is a synthetic peptide of 44 amino acids that reproduces the sequence of human growth hormone-releasing hormone (GHRH) and carries a trans-3-hexenoyl group on its N-terminal tyrosine. That small fatty-acid modification blocks cleavage by dipeptidyl peptidase-4, the enzyme that rapidly degrades native GHRH in plasma. The result is a molecule with a longer circulating half-life than the natural hormone while retaining the same receptor target. It is supplied as a lyophilized powder for reconstitution and belongs to the broader class of GHRH analogs studied for effects on pituitary growth hormone secretion.
Development work on the compound, originally designated TH9507, focused on conditions in which reduced growth hormone signaling is thought to contribute to altered body composition. The United States Food and Drug Administration approved it in 2010 for the treatment of excess visceral abdominal fat in adults with human immunodeficiency virus infection and lipodystrophy. Later research examined other populations, including adults with mild cognitive impairment, where a large trial did not meet its primary endpoints. This mixed record illustrates how a single mechanism can produce clear effects in one setting and inconclusive results in another.
Research supply is often accompanied by a certificate of analysis listing chromatographic purity, mass confirmation, and storage conditions. Laboratories compare that document with an independent test when material is intended for bench work, since certificates describe a batch rather than an individual vial. Published studies usually state the source and purity of the peptide because small differences in purity can shift measured activity. Full analytical validation is rarely reported, which leaves batch-to-batch comparability an open question.
The peptide is supplied as a lyophilized powder in single-use vials and is normally kept refrigerated between two and eight degrees Celsius, protected from light. Once dissolved, the solution is handled carefully because peptide bonds and the acyl modification can degrade under warm or alkaline conditions. Vials are inspected for cracks, and the powder is checked for color and uniformity before handling. Temperature excursions during shipping are a frequent reason for quality questions.
Identity and purity are assessed with reversed-phase high-performance liquid chromatography, which separates the peptide from truncated or oxidized forms. Mass spectrometry confirms the expected molecular weight, and peptide mapping after enzymatic digestion verifies the amino acid sequence. Water content is measured because residual moisture affects stability, and tests for aggregates or particulates are standard for injectable peptides. Circular dichroism can indicate whether the molecule has adopted an unexpected secondary structure in solution.
Metabolic interest in this compound centers on fat distribution rather than on hormone levels alone. Imaging trials in adults with excess abdominal fat report reductions in visceral adipose tissue, while subcutaneous depots change comparatively little. Growth hormone and IGF-1 are presumed to carry the effect, but the separate contribution of each is not firmly established. Whether these changes persist after treatment stops, and whether they alter longer-term health outcomes, remain open questions that published work does not answer consistently.
Tesamorelin is a synthetic peptide of forty-four amino acids whose sequence reproduces human growth hormone-releasing hormone. Its distinguishing feature sits at the amino terminus, where a trans-3-hexenoyl group replaces the free amine. That acylation slows cleavage by dipeptidyl peptidase IV, an enzyme that otherwise removes the first two residues and inactivates the natural hormone quickly. The modified peptide therefore persists longer in circulation while keeping the same receptor target. It is handled as a lyophilized solid and dissolved shortly before use.
Signaling begins at the GHRH receptor, a class B G protein-coupled receptor displayed on somatotroph cells of the anterior pituitary. Receptor occupancy activates Gs proteins, which raise adenylyl cyclase activity and intracellular cyclic AMP, in turn driving protein kinase A dependent pathways. The downstream output is synthesis and pulsatile secretion of growth hormone into the bloodstream. Hepatic tissue and peripheral sites respond by increasing insulin-like growth factor 1 production. Somatostatin and IGF-1 itself supply negative feedback that caps the size and duration of each secretory burst.
=== Coupling with oxidative phosphorylation === According to the chemiosmotic coupling hypothesis, proposed by Nobel Prize in Chemistry winner Peter D. Mitchell, the electron transport chain and oxidative phosphorylation are coupled by a proton gradient across the inner mitochondrial membrane. The efflux of protons from the mitochondrial matrix creates an electrochemical gradient (proton gradient). This gradient is used by the FOF1 ATP-synthase complex to make ATP via oxidative phosphorylation. ATP-synthase is sometimes described as Complex V of the electron transport chain. The FO component acts as a channel that harnesses the proton flow to drive rotation. It is composed of a, b and c subunits. Protons in the inter-membrane space of mitochondria first enter the ATP-synthase complex through an a subunit channel. Then protons bind to the c subunits, which are oriented in a ring (the c-ring), where the number of c subunits determines how many protons are required to make the c-ring and the attached γ-rotor turn one full revolution. There are 8 c subunits in humans, thus 8 protons are required. Protons are released as a result of the rotation of the c-ring, being directed into the mitochondrial matrix along the a subunit channels. This proton reflux drives the mechanical rotation of the c-ring and the γ-axle. The rotation of the γ-rotor causes the sequential alternation of conformational states in the catalytic β-subunits in F1. There are three different conformational states, which are:
Beyond acting as the carrier protein for vitamin D and its metabolites, DBP also transports free fatty acids, binds to actin and may help prevent actin polymerization during tissue injury. It also might serve as a macrophage activator, contributing to the inflammatory response by modulating T-cell activity. As Gc protein-derived macrophage activating factor it is a Macrophage Activating Factor (MAF) that has been tested for use as a cancer treatment that would activate macrophages against cancer cells.
Mixing red, green, and blue sources to produce white light needs electronic circuits to control the blending of the colors. Since LEDs have slightly different emission patterns, the color balance may change depending on the angle of view, even if the RGB sources are in a single package, so RGB diodes are seldom used to produce white lighting. Nonetheless, this method has many applications because of the flexibility of mixing different colors, and in principle, this mechanism also has higher quantum efficiency in producing white light. There are several types of multicolor white LEDs: di-, tri-, and tetrachromatic white LEDs. Several key factors that play among these different methods include color stability, color rendering capability, and luminous efficacy. Often, higher efficiency means lower color rendering, presenting a trade-off between the luminous efficacy and color rendering. For example, the dichromatic white LEDs have the best luminous efficacy (120 lm/W), but the lowest color rendering capability. Although tetrachromatic white LEDs have excellent color rendering capability, they often have poor luminous efficacy. Trichromatic white LEDs are in between, having both good luminous efficacy (>70 lm/W) and fair color rendering capability. One of the challenges is the development of more efficient green LEDs. The theoretical maximum for green LEDs is 683 lumens per watt, but as of 2010 few green LEDs exceed even 100 lumens per watt. The blue and red LEDs approach their theoretical limits. Multicolor LEDs offer a means to form light of different colors.
== Structure == OmpT is a 33.5 kDa outer membrane protein consisting of 10 antiparallel strands that are connected by 5 extracellular loops. The antiparallel strands form a beta barrel structure that spans the width of the membrane, creating a pore. E. coli omptins can be coded either from the OmpT gene on a chromosome (part of a DLP12 prophage) or from OmpP on a plasmid (OmpP). The sequences resulting from these two sources differ by 24-25% in the mature protease. Genetic differences between OmpT and other members of the omptin family are found in the extracellular loops, and therefore, this area is thought to be associated with substrate specificity. Also, the barrel is relatively rigid, while the loops have more flexibility to bind to substrates of varying sizes.
At the conclusion of the arc, Wolverine takes a leave of absence from the X-Men. By the mid-1990s, Wolverine was one of Marvel's most popular characters, rivaling Spider-Man. In 1995, all of the X-Men related comic books were temporarily replaced by a storyline in an alternate reality, named Age of Apocalypse; the Wolverine series was renamed Weapon X. Following the return to the original timeline, a follower of Apocalypse captures Wolverine and attempts to bond adamantium to his skeleton a second time, with the goal of making him one of Apocalypse's warriors. Wolverine's healing factor and willpower reject the process, but the ensuing stress leads him to regress into a bestial state. Stick, the former mentor of Daredevil, sends Elektra to re-train Wolverine, and heal his psyche. For a few issues of his title, Wolverine remains in a bestial state in which he is less articulate and shrewd. Hama left the Wolverine series with issue #118 (November 1997), and Logan's adamantium was restored at the end of the decade in issue #145 (December 1999).
Sources: en.wikipedia.org
Even snRNAs and snoRNAs themselves undergo series of modification before they become part of functional RNP complex. This is done either in the nucleoplasm or in the specialized compartments called Cajal bodies. Their bases are methylated or pseudouridinilated by a group of small Cajal body-specific RNAs (scaRNAs), which are structurally similar to snoRNAs.
In the 1980s and 1990s, Athene Donald's polymer physics lab in Cambridge extensively characterised phase transitions / phase separation of starch granules from the cytoplasm of plant cells, which behave as liquid crystals. In 1991, Pierre-Gilles de Gennes received the Nobel Prize in Physics for developing a generalized theory of phase transitions with particular applications to describing ordering and phase transitions in polymers. Unfortunately, de Gennes wrote in Nature that polymers should be distinguished from other types of colloids, even though they can display similar clustering and phase separation behaviour, a stance that has been reflected in the reduced usage of the term colloid to describe the higher-order association behaviour of biopolymers in modern cell biology and molecular self-assembly.
=== 1988 === 11 February Running to Time, about the new InterCity 225; the National Express Coaches Rapide service; the project team of the Intercity 225, with project director Mike Rollin, and Mike Newman of GEC; the 225 train had to be delivered on 14 February 1988, with an operational life of thirty years; the InterCity 125 was not intended to have been primarily developed - in a board meeting, the commercial directors were not technologically knowledgeable of trains, and asked about alternatives, to be told by an engineering director that a 125 mph diesel train could be developed in two years, so the HST began at that meeting; the British Rail APT-E prototype, powered by the Leyland 2S/350 gas turbine; in 1974 BR commissioned the APT-P, which had ten years of development, due to the active tilting suspension; the 225 train was possibly to enter service on the UK's only large electrified line, the West Coast Main Line, but the much-straighter and faster East Coast Main Line was being electrified, so BR decided to implement the 225 train on the ECML instead; Crewe railway station, which opened in 1837, and where trains were first built nearby in 1843; Steve Corfield, of Crewe Works; the unsprung mass of a train, and Cardan shafts; Roger Ford of Modern Railways; John Prideaux, director of InterCity; David Carter of DCA in Warwick, who designed the livery; the Modernisation Plan was published in December 1954, which had advocated the electrification of the ECML, and the phasing-out of steam travel; the late-1980s ECML electrification had cost BR £350m - it was not government-funded, with 2,800 miles of copper wire, and 33,000 support masts, overseen by Don Heath; all of the improvements in the UK were on old lines of track, but France and Germany had built entire new electrified lines - the TGV was planned from the mid-1960s; G. Freeman Allen of Jane's World Railways; the 225 train underframe being built at Crewe Works; GEC Traction at Preston, Lancashire, Al Reed, the separately excited (Armature Controlled DC Motor) brushed DC electric motor, and Gerald West; the right-angle gearboxes were built by David Brown Ltd and Voith of Heidenheim an der Brenz in southern Germany; Eric Black of Metro-Cammell in Washwood Heath; the ST41 bogies were made by SIG Combibloc Group of Neuhausen am Rheinfall in Switzerland. Narrated by Robin Ellis, produced by Patrick Uden, directed by Paul Fabricius, made by Uden Associates. 12 February Playing with Fire 17 July The Air Fix!, about aviation safety; a television adaptation of a black comedy theatre production by 35-year-old James Castle, dressed as an airline pilot, largely featuring Turkish Airlines Flight 981, the Ermenonville air disaster, in France on 3 March 1974, to this day the worst airliner crash, without any survivors, with 177 British people killed, when a cargo door ruptured, and the subsequent enquiry led to a cover up by the airline and aviation authority; the DC10 had known design failings in its fuselage, and its cargo door design was known to be faulty by the aircraft manufacturer; the American Airlines Flight 96 crash had happened on 12 June 1972, involving a design failure of the cargo door, but the FAA nonetheless gave the DC-10 a certificate of airworthiness; the DC10 had been rushed into service; James Castle accused the aircraft industry of callous negligence; James Castle had been a British Airways aircraft maintenance technician from 1969 to 1977 at Heathrow Airport; he listed the numbers of children that lost one or both parents in the crash, and the numbers of women who were widowed; the theatre production had been going since December 1986, directed by Caroline Noh Narrated by James Castle, produced by Ben Gooder, made by Uden Associates 24 July Nic's Boat, about Nic Bailey, a 37-year-old architect with Foster and Partners; he designed a 40-ft trimaran, called MTC, for the Carlsberg Single-Handed Trans-Atlantic Race on 5 June 1988; he had helped to design the 1978 Sainsbury Centre for Visual Arts in Norwich and the Renault Centre in Swindon; boat builder Spud Rowsell in Exmouth, with Phil Morrison; the hull cost £46,000, and the rigging cost £46,000; the mast and rigging were fitted at Topsham, Devon; Robin Knox-Johnston; French yacht designer Bruno Fehrenbach; he sailed the Atlantic between the Rhumb Line Route and the Great Circle Route; some yachts made the journey to Newport, Rhode Island in ten days; the yacht mast was constructed by Proctor South West. Produced by Michael Wills, directed by Bob Bee, made by Juniper Productions 31 July The Living Dead 7 August Zen and the Art of TV Manufacture, a Panasonic TV factory in South Wales; in 1933 the company founder Kōnosuke Matsushita established seven guiding commercial principles; the Fidelity TV factory in west London was given one year - 1988 - to turn its fortunes around or be closed; the factory's closure was announced to the workforce on 25 January 1988, with the site closing at the end of July 1988; Amstrad bought the Fidelity name in May 1988. Narrated by Alan Howard, directed by Patrick Uden, produced by Michael Proudfoot, made by Uden Associates 14 August How Good Is Soviet Science?, about the political inhibition of Soviet technology in the 1980s; in many ways the Soviet Union in 1987 was a backward and underdeveloped nation, with food queues; the Soviet system didn't respond to changes in demand - everything was planned years in advance; physicist Alexander Prokhorov, who won the Nobel Prize for Physics in 1964; Russians were proud of mathematicians Pafnuty Chebyshev and Nikolai Lobachevsky; large government centrally planned projects were compatible with the communist system, notably its space programme; by the 1970s, the Russians realised that they were some distance behind other countries, such as in disciplines of computing and genetics; science teaching was emphasised at Soviet schools, and English was well taught as well; after secondary schools, half went into science; theoretical science was where Soviet teaching excelled, such as at the Steklov Institute of Mathematics; Yuri Ovchinnikov wanted to improve Soviet science; in the early 1950s, the Soviet Union tried to ignore the findings of genetics, through the work of Trofim Lysenko, who claimed that genetics was anti-communist, known as Lysenkoism leading to many scientists being imprisoned and executed; in the 1960s, a set of large biological research centres were built at Pushchino; one of the most well-built research institutes was the Shemyakin Institute of Bioorganic Chemistry, for biotechnology; Stalin did not like computer science, and it was largely banned until 1958; the Soviets were always years behind in computer science; the first recognisable transistor Soviet computer was the BESM-6 in the 1960s; later computers were the ES EVM series, copied from the IBM System/360; the Akademgorodok (Academic City) in Novosibirsk; the Institute of Automation and Electrometry researched optical memory on holographic slides to and much work on lasers; collaboration between Soviet research and Soviet industry was long-winded, maybe almost impossible - the centrally planned Soviet industry could not sufficiently adapt for short-term changes, as it had to be monotonously planned years in advance, for mass production; Soviet government research was perhaps excellent nonetheless; not many Soviet scientists could travel to international conferences; dissemination of current worldwide science was limited throughout the Soviet Union, due to widespread government restrictions; Suite No. 2 in B minor, BWV 1067. Narrated by US technology historian Loren Graham, produced by Chris Durlacher, directed by Martin Smith, made by Uden Associates, NDR and WGBH. Shown on Nova on 17 November 1987 and 22 March 1988 21 August Toys for the Boys, about the Williams racing team; Graham Hill and Jim Clark in 1967; Tomorrow's World in 1967, narrated by Derek Cooper; journalist Peter Windsor of Williams; aerodynamicist Frank Dernie, head of research at Williams; Keith Botsford, motor racing editor of the Sunday Times; the German racing manager Alfred Neubauer, in the late 1930s; there were 18 F1 teams, with 7 being British; Mobil Oil paid Williams £2.5m for advertising on the cars of Nigel Mansell and Riccardo Patrese; the Williams FW11; racing driver Howden Ganley; part of a BBC Horizon documentary broadcast on 9 March 1981, featuring the Williams FW07, and likewise narrated by Martin Jarvis and produced by Patrick Uden; engineering director Sir Patrick Head; Bach Mass in B minor; Mike Hawthorn, was killed on a public road, the A3 Guildford bypass, in his Jaguar Mark 1 on 22 January 1959; Canadian Gilles Villeneuve was thrown from his Ferrari, when qualifying for the 1982 Belgian Grand Prix; Swedish Ronnie Peterson, died after an accident on the start line at the 1978 Italian Grand Prix; Italian Elio de Angelis was killed in May 1986 at the Circuit Paul Ricard in south-east France; British Piers Courage burned to death at the 1970 Dutch Grand Prix; Jim Clark hit a tree on 7 April 1968 at the 1968 Deutschland Trophäe in the north-west of Baden-Württemberg; German Jochen Rindt was killed at the 1970 Italian Grand Prix after winning the championship in the same year, which was awarded posthumously; Bach Mass in B minor; Frank Williams had a crash on 8 March 1986 in the south of France, with Peter Windsor, in a Ford Sierra, making him quadraplegic; the Williams wind tunnel; Alan Jones waving the British flag at the 1980 Grand Prix; the 1988 season Williams car had a Judd V8 engine; the closing fanfare of Les préludes by Liszt; the documentary ends with German military march Prussia's Glory. Narrated by Martin Jarvis, produced by Patrick Uden, made by Uden Associates 28 August Cold Spring, Morning Sun, about atomic physicist Joan Hinton and her husband Erwin Engst. Joan's mother was teacher Carmelita Hinton. Joan worked on the top secret Manhattan Project at Los Alamos in 1944 which produced the atomic bombs that were dropped on Hiroshima and Hagasaki in the summer of 1945. After the war, Joan, her brother Bill, and her husband Erwin (Sid) Engst travelled to China to join Mao Ze Dong and the cultural revolution. Over the next five decades, Joan and Sid became pioneers in Chinese agricultural science and technology. Narrated by Liza Goddard, written, produced and directed by Chris Haws, Made by InCA. 18 September Taking the Tunnel, who would be travelling through the Channel Tunnel; the tunnel would open in May 1993; Colin Kirkland, technical director of Eurotunnel; Roger Vickerman of the University of Kent; historian Corelli Barnett, and how France and Germany spent money after the war improving rail infrastructure; journalist Kathy Watson; a working model was built of the two Channel rail terminals; 90% of the tunnel went through chalk; the French end was built much more water-tight than the English end, due to the worse geology; the tunnel was around one mile long at the English end, to meet the French side in 1990; the Single Market would stop duty free sales on the Channel ferries; the former Night Ferry across the Channel, which operated until 30 October 1980; TGV Est would connect Bordeaux, and TGV Nord would connect to Germany, the Netherlands, with a spur to the new tunnel; Richard D. North; tolls on the autoroutes discouraged local traffic, which slowed down British motorways; Daniel Ghouzi of Transmanche; Martin Simmons of Kent County Council; A292 junction of M20; Corelli Barnett believed that the British civil service was best at fudging, whereas the French civil service had been trained differently at the French grandes ecoles; a VTG ship from Dover to Dieppe carried trains; freight journeys over 250 miles were most cost effective by rail, but did lack logistical flexibility at either end; Michael Barclay of Tiphook Rail; a distribution centre in Paddock Wood in Kent, built by the Spanish Transfesa; UIC gauge was the main European gauge for freight; Artura Boix of Transfesa; Richard Hope of Railway Gazette; British trains had a 25 tonne axle weight, more than the European 22 tonnes; early plans for the new Eurostar trains, which would be dual voltage for travelling in England and France; rail writer Geoffrey Freeman Allen; the French trains would leave from the Gard du Nord; customs checks would be at the British end in London, but not in France; British Rail planned a high speed line across Kent to open in 1998 from King's Cross, but it would not open until September 2003, and to London in November 2007; Roger Ford of Modern Railways. Narrated by Geoffrey Palmer, produced by Patrick Uden, directed by Paul Fabricius, made by Uden Associates 25 September Road Test about road transport in the UK; there were two million vehicles in the UK in 1930; a test drive would be conducted from The Point, Milton Keynes at 8.30am to Maidstone, by different routes - Mike McDonald of the University of Southampton and Margaret Bell of the University of Nottingham in a Volvo 850 would go across London, and Peter Bonsall and Howard Kirby of the University of Leeds in a Volkswagen Passat B3, would follow the M25 to the north of London, George Hazel of Napier College and John Wootten in a Ford Granada would follow the M25 south of London, and Martin J. H. Mogridge would take the train on the new Thameslink from Bedford railway station via Blackfriars Railway Bridge; the test would be directed from the Road Traffic Research Centre at Middlesex Polytechnic, with Chris Wright, Peter Hills from Newcastle University, and psychologist Ivan Brown from the Applied Psychology Unit (MRC Cognition and Brain Sciences Unit) in Cambridge; variable-message signs (VMS) on the M6; before joining the M25, the vehicles had an average speed of 50 mph; the early plans in the 1940s for the M25, which the M25 to the south and west of London, now largely follows; when the M25 needed to be built, in the 1960s, many environmental objections had arisen for it to be built; Russ Kane in Capital Radio's Flying Eye; David Marsh at the AA Roadwatch studio in north London; the ramp meter, installed on the M6 by John Wootten; all of London's traffic lights were controlled from a computer centre in Westminster, with software (Split Cycle Offset Optimisation Technique) developed by Dennis Robertson; the Volvo 850 enters London along the Edgware Road and Park Lane to Hyde Park Corner; the prototype Autoguide system invented by Ian Catling; automatic vehicle identification (AVI) and piezoelectric strips developed at the University of Nottingham Department of Civil Engineering, and tested by Peter Davies on the Nottingham ring road, next to the QMC; the Volkswagen Passat arrives first at the Great Danes Hotel, making the 107 miles in two hours seventeen minutes, an average speed of 47 mph; the route south of London - 119 miles, also has a 47 mph average speed; the 96-mile rail journey had an average speed of 35 mph; the programme content would be copied by Top Gear fifteen years later. Narrated by Martin Jarvis, produced by David Sharp, directed by Mike Tomlinson, made by Orlando Productions 9 October Look, No Hands! about technology outpacing human knowledge; Hubert Dreyfus of University of California, Berkeley; Martin Corbett, industrial psychologist at the University of Warwick; work by Mike Cooley, and systems design; mechanical engineer Frederick Winslow Taylor and his meticulous improvements to industrial methods, in his book The Principles of Scientific Management; John Harris, manager of the Rolls-Royce helicopter engine plant at Leavesden, Hertfordshire; perhaps automation in engineering manufacturing processes could perhaps add or enhance, rather than totally replace, which required and produced less directly competent workers. Produced by Debra Hauer, directed by Christopher Rawlence, made by Hauer Rawlence Productions 16 October Spytech, John Pike of the Federation of American Scientists and how the Space Shuttle was built mostly for low Earth orbit reconnaissance satellites; but the Titan 34D was also available for many spy satellite launches; Christopher Andrew of the University of Cambridge; Harry Rositzke of the CIA, and the disastrous Operation Red Sox, from 1949 to 1953; William Colby, Director from 1973 to 1976 of the CIA, and how spying methods that worked in Germany during World War II were simply hopeless in a possibly more bizarre culture of communist eastern Europe in the early 1950s, so Ferret missions by B-29 aircraft over the border were attempted instead, but many were shot down; the Americans decided to go for high-altitude reconnaissance; on 1 May 1960, an aircraft photographing a missile construction factory, pilot was sentenced to 10 years, but released after two years in exchange for Rudolf Abel; H. Keith Melton and notorious improvised technology of the KGB; the Russian defector Stanislav Levchenko; the burst transmission method; camera lenses for spy satellites made by Itek; the Space Shuttle was built to maintain and repair the Key Hole set of spy satellites, such as KH-11 KENNEN, launched by the National Reconnaissance Office (NRO) in 1976, and introduced digital photography, and EOSAT and its Landsat program; Jeffrey T. Richelson, a writer on national security; Major-General George Keegan of the Twenty-Fifth Air Force described how the Soviet Union got to know when spy satellites would be overhead, and would hide anything sensitive; listening satellites sent their data to the NSA at Fort Meade in Maryland, such as data from Magnum, launched by the secret STS-51-C mission in January 1985; Paul Bracken and all-source intelligence fusion; Soviet intelligence in the US was quite widespread, with up to 800 spies operating out of Soviet trade missions, and operated much more widespread than the US had attempted; the new KH-12 satellite, that launched in November 1992, could see through clouds. Narrated by Mike Short, produced by Claudia Milne, made by Twenty Twenty 23 October Bamboo, the importance of bamboo to the Chinese economy; Prof Hsiung Wenyue of the Bamboo Research Centre of Nanjing Forestry University; bamboo structures do not collapse in high winds; over a thousand species of bamboo; bamboo dies out for ten years, then grows again; only 15% of China can be cultivated; bamboo can grow four feet in 24 hours, it is the fastest growing plant; bamboo has a tensile strength twice as much as timber; hospitals in China worked with herbal remedies; bamboo traders had quotas set by the Chinese government; bamboo shoots were mostly exported to Japan; growing bamboo helped soil structure; the Chinese government encouraged the growing of bamboo, as an alternative to timber. Narrated by Jenny Agutter, produced by Michael Blakstad, directed by Patrick Fleming, made by Workhouse Productions, made in cooperation with China Central Television 30 October Heavy Metal, chemist Neil Ward of the University of Surrey, who found abnormal pregnancies; medical doctor Robin Russell-Jones of the Campaign for Lead Free Air; environmental chemist Brian Davies of the University of Bradford; footage from the 1971 BBC A Public Poison, with chemist Derek Bryce-Smith, and Patrick Lawther of St Bartholomew's Hospital; Gloria all'Egitto from Aida by Giuseppe Verdi, with the assembly line of the Rover 800; Robin Brundle; Eric Fountain of Vauxhall Motors; Ojos Criollos by Louis Moreau Gottschalk. Narrated by Catherine Robins, produced by Michael Blakstad, made by Workhouse Productions 13 November Free Flight, about gliding, with Derek Piggott in a Rolladen-Schneider LS4 at Booker Gliding Centre in Buckinghamshire; in the UK there were about 350,000 flights and 2 deaths each year; a Schleicher ASW 24 in a wind tunnel with Loek Boermans at TU Delft Faculty of Aerospace Engineering in the Netherlands; the Schleicher ASH 25 with glider pilot John Jeffries at London Gliding Club west of Dunstable; at Wasserkuppe, a 3,000 ft mountain in the east of Hesse in the centre of Germany is where gliding mostly developed in the 1920s by the Deutsche Forschungsanstalt für Segelflug, due to German powered-aircraft manufacturing being legally restricted; nearby at Poppenhausen, Hesse is Alexander Schleicher GmbH & Co, with designer Gerhard Waibel, where gliders had wings made from carbon fibre, and covered in kevlar for torsional stiffness; the first glider of a contemporary design was the Akaflieg Stuttgart fs24 in 1951. Narrated by Robert Gary 20 November Chaos, Tim Palmer of the ECMWF; mathematician Robert L. Devaney; German mathematician Heinz-Otto Peitgen and fractal geometry; strange attractors in dynamical systems, such as weather systems; David Rand of the University of Warwick, and period-doubling bifurcation, discovered in 1975 by mathematician Mitchell Feigenbaum discovered; fractal landscapes; British mathematician Michael Barnsley, and affine transformations, which are applied to digital image processing; the chaos game; Soviet physicist Lev Landau; physicist Harry Swinney of the University of Texas; economist James B. Ramsey; Ian Stewart of the University of Warwick, and the unpredictable rotation of Hyperion. Written, produced and directed by Chris Haws, the programme was made by Independent Communications Associates (InCA). In 1989, it won the SciTech Award for best scientific documentary. 27 November The Art of Deception, about camouflage, deception, decoys and stealth. The Northrop Grumman B-2 Spirit was first displayed on Tuesday 22 November 1988, just five days before the programme was aired. Featured interviewees include: Richard P. Hallion of Wright-Patterson Air Force Base; Peter Varnish of the Admiralty Research Establishment at Funtington in West Sussex; defence writer Antony Preston; Roy Behrens of the Art Academy of Cincinnati; Lt Col Chris Nash of Surveillance, Target Acquisition, Night Observation and Counter-surveillance (STANOC); Major William Marshak of the AAMRL - now the 711th Human Performance Wing; Captain Brian Perowne, commanding officer of HMS Brazen (F91); aviation writer Bill Sweetman, and Commander Patrick Walker, commanding officer of HMS Trafalgar (S107) a Royal Navy hunter-killer submarine; John Hall of the Admiralty Research Establishment (former Admiralty Experiment Works) at Haslar. Narrated by Nick Chilvers, Written, produced and directed by Chris Haws, made by InCA and WGBH Boston
=== By age uncertainty (±σ) === There are no set limit for age uncertainty and the cut-off value varies with different precision requirement. Although excluding data with huge age uncertainty would enhance the overall zircon grain age accuracy, over elimination may lower overall research reliability (decrease in size of the database). The best practice would be to filter accordingly, i.e. setting the cut-off error to eliminate reasonable portion of the dataset (say <5% of the total ages available)
=== Japan === Between 1992 and 1997, Japan's Ministry of International Trade and Industry sponsored a "New Hydrogen Energy (NHE)" program of US$20 million to research cold fusion. Announcing the end of the program in 1997, the director and one-time proponent of cold fusion research Hideo Ikegami stated "We couldn't achieve what was first claimed in terms of cold fusion. (...) We can't find any reason to propose more money for the coming year or for the future." In 1999 the Japan C-F Research Society was established to promote the independent research into cold fusion that continued in Japan. The society holds annual meetings. Perhaps the most famous Japanese cold fusion researcher was Yoshiaki Arata, from Osaka University, who claimed in a demonstration to produce excess heat when deuterium gas was introduced into a cell containing a mixture of palladium and zirconium oxide, a claim supported by fellow Japanese researcher Akira Kitamura of Kobe University and Michael McKubre at SRI.
Sources: en.wikipedia.org
Refrigeration between 2 and 8 degrees Celsius with protection from light is the common recommendation. Many laboratories choose frozen storage at minus 20 degrees Celsius when the material will not be used soon. Repeated temperature cycling is generally avoided.
Mass spectrometry gives the observed mass, which is compared against the value calculated from the sequence. Peptide mapping after digestion provides a second, sequence-level check. Chromatographic retention alone is not sufficient for identity.
Antibodies raised against one GHRH-related peptide may bind other members of the same family. That cross-reactivity inflates or distorts measured concentrations. Assay validation with defined standards is therefore necessary before results are interpreted.
特沙莫瑞林是国际非专利名称，指一种经过 N 端修饰的生长激素释放激素类似物。它被归类为合成肽，序列与 GHRH(1-44) 密切相关。该名称不指代任何特定品牌或剂型。