If you have been reading about reverse-phase HPLC 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.
Last reviewed on 2026-04-23. Where a claim depends on a specific study, the study is described rather than over-claimed.
Two forms circulate under the CJC-1295 name, and they differ by a single appended group. The version without a drug affinity complex carries four substitutions along the peptide chain, including a D-alanine near the amino terminus and replacements at three other positions. These changes block the enzyme dipeptidyl peptidase IV and remove a methionine residue that is prone to oxidation. The modified fragment is frequently labeled MOD GRF 1-29. Naming conventions are inconsistent across informal sources, which is a common source of confusion.
The second form adds a maleimide-bearing linker to the lysine at the carboxyl end. This group reacts with cysteine-34 on circulating serum albumin, forming a covalent bond that keeps the peptide in the bloodstream for far longer. ConjuChem developed the molecule as a way to extend the action of a peptide without frequent administration. The albumin attachment is the defining structural feature of the drug affinity complex version. Whether continuous exposure produces effects distinct from shorter pulses remains an unresolved research question.
Naming in this area is inconsistent, and readers should treat product labels with care. In much of the literature and in vendor catalogs, the unqualified term refers to the albumin-binding version, while the version lacking the DAC group appears as modified GRF(1-29), mod GRF(1-29), or the same name with a without-DAC qualifier. Because one abbreviation has been applied to both materials, the only reliable way to identify a sample is to check the stated sequence and the presence of the linker.
CJC-1295 is the name used for a synthetic peptide modeled on growth hormone-releasing hormone, the hypothalamic signal that prompts the pituitary to release growth hormone. The compound was described by a Canadian drug discovery company in the mid-2000s as a long-acting research tool. Two closely related molecules share the name in practice: one carries a drug affinity complex, or DAC, group, and one does not. The distinction matters because the two behave differently in circulation.
| Property | Value | Notes |
|---|---|---|
| Molecular class | Synthetic peptide | GHRH analog, not a steroid |
| Backbone length | 29 amino acids | Based on GRF(1-29) |
| Substitutions | Four positions | D-Ala2, Gln8, Ala15, Leu27 |
| Appearance | White to off-white powder | Typical lyophilized research material |
| Common synonyms | Modified GRF(1-29) | Usage varies between sources |
The attached maleimide group explains the unusual duration of the DAC version. After injection it reacts with the thiol of cysteine-34 on serum albumin, forming a stable covalent bond. The resulting conjugate is too large for rapid kidney filtration and is shielded from many peptidases. Reported half-lives for this form reach several days, whereas the version without the group is cleared in roughly half an hour. That gap is the main pharmacological difference between the two.
Downstream of growth hormone, the liver and other tissues increase production of insulin-like growth factor 1, a mediator of many growth-promoting effects. Studies have documented elevated levels of both hormones after dosing, and the rise from the long-acting form persists longer than that produced by shorter-acting analogues. What remains unclear is whether sustained elevation of these markers translates into meaningful clinical benefit, and whether prolonged exposure carries risks that short trials could not detect.
CJC-1295 acts at the growth hormone-releasing hormone receptor, a G-protein-coupled receptor found on somatotroph cells in the anterior pituitary. Binding triggers a rise in cyclic AMP and calcium entry, which promotes release of stored growth hormone. Because the peptide mimics the body's own releasing hormone, it amplifies existing secretory pulses rather than driving continuous output. The size of the response therefore depends partly on the subject's own hormonal rhythm and feedback state.
Lyophilized material is typically stored at minus twenty degrees Celsius or lower. Keeping the vial dry and protected from light preserves peptide integrity. Repeated freeze-thaw cycles can cause aggregation or loss of activity. Once dissolved, solutions are generally kept at two to eight degrees Celsius. Stability data for reconstituted solutions vary, and long-term behavior is not fully established. Working aliquots reduce the number of times a stock container is opened.
Reverse-phase high-performance liquid chromatography is the standard tool for purity assessment. The technique separates the target peptide from truncated or modified byproducts. Mass spectrometry confirms molecular weight and supports sequence verification. Electrospray ionization and matrix-assisted laser desorption are both used. Amino acid analysis provides an independent check on composition. Purity values are commonly reported as area percentage from the chromatogram. Residual trifluoroacetate and water content are also measured in many quality programs.
Numerous Jamaicans migrated mainly to the islands of San Andres and Providencia. A number of other Europeans and North Americans migrated to the country in the late 19th and early 20th centuries, including people from the former USSR during and after the Second World War. Many immigrant communities have settled on the Caribbean coast, in particular recent immigrants from the Middle East and Europe. Barranquilla (the largest city of the Colombian Caribbean) and other Caribbean cities have the largest populations of Lebanese, Palestinian, and other Levantines. There are also important communities of Romanis and Jews. There is a major migration trend of Venezuelans, due to the political and economic situation in Venezuela. In August 2019, Colombia offered citizenship to more than 24,000 children of Venezuelan refugees who were born in Colombia.
=== Agents of the Four Seasons and Guards === Hinagiku Kayo (花葉 雛菊, Kayō Hinagiku) Voiced by: Yuka Nukui (Japanese); Celeste Perez (English) The Agent of Spring, possesses the ability of "Life Acceleration". She was kidnapped and held captive by the "Insurgents", natural enemies of the Agents of the Four Seasons, for almost ten years, during which spring did not occur. She has had feelings for Rosei since she was little. As an illegitimate daughter born of the head of Kayo family and his mistress, the previous Agent of Spring Kobai Yukiyanagi, her family treats her poorly even after her return. In her captivity Hinagiku was abused by the leader Misuzu Henderson both physically, emotionally and mentally. Hinagiku was also forced to cultivate plants for the Insurgents to be used as illegal drugs. After eight years Hinagiku snapped and nearly kills Misuzu and escaped, but she isolated herself from her duties for two years as the abuse affected her deeply. Sakura Himedaka (姫鷹 さくら, Himedaka Sakura) Voiced by: Kana Hanazawa (PV), Yoshino Aoyama (anime) (Japanese); Marisa Duran (English) The Agent of Spring's Guard. She is an attendant who never stopped looking for Hinagiku, suffering regret for not being able to protect her charge. The love she felt for Itecho surpassed the adoration of a student towards her master, but due to a certain event she hates him deeply. Even after the Town of Spring and Winter stopped searching for Hinagiku, she continued to search for her alone.
== History == The first ion funnel was created in 1997 in the Environmental Molecular Sciences Laboratory Pacific Northwest National Laboratory by the researchers in Richard D. Smith's lab. The ion funnel was implemented to replace the ion transmission-limited skimmer for more efficient ion capture in an ESI source. Many characteristics of the ion funnel are attributed to the stacked ring ion guide, however, the disks of an ion funnel vary in diameter down its long axis. There is a portion at the base of the ion funnel in which a series of cylindrical ring electrodes have decreasing diameters, which enables the ion cloud entering the ion funnel to be spatially dispersed. This allows for efficient transfer of the ion cloud through the conductance limiting orifice at the exit as the ion cloud becomes focused to a much smaller radial size. The DC electric field serves to push ions through the funnel. For positive ions, the front plate of the funnel has the most positive DC voltage, and subsequent plates have gradually decreasing DC components, providing added control. RF and DC electric fields are co-applied with a pseudopotential created with alternating RF polarities on adjacent electrodes. This “pseudo-potential” radially confines ions and causes instability in ions with a lower m/z (mass to charge ratio) while ions with a higher m/z are focused to the center of the funnel. The initial ion funnel design used in the Smith research lab proved inefficient for collecting ions with low m/z.
Believing that Gary, the Nosferatu chief, has stolen the sarcophagus, the fledgling is sent to Hollywood to find him; after locating a captured Nosferatu for Gary, he reveals that the Giovanni vampire clan stole the sarcophagus. The fledgling infiltrates the Giovanni mansion and finds the sarcophagus guarded by the Kuei-Jin, who claim their leader, Ming-Xiao, has allied with LaCroix. The locked sarcophagus is returned to LaCroix's tower, and Beckett, a vampire scholar, tells the fledgling that the only person who can open it has been abducted by Bach to lure LaCroix. The fledgling kills Bach and learns that the sarcophagus's key has been stolen. The fledgling returns to LaCroix, learning that the Sabbat tried to steal the sarcophagus to destroy it and prevent Gehenna, then kills the Sabbat leader to disperse his followers. The fledgling is met by Ming-Xiao, who offers an alliance. Ming-Xiao reveals that she has the key, and LaCroix killed Grout to prevent his powerful insight from unveiling LaCroix's plans; Ming-Xiao disguised herself as Nines at the mansion to frame him. Denying Ming-Xiao's claims, LaCroix rescinds the blood hunt on Nines and entrusts the fledgling with recruiting the anarchs to punish the Kuei-Jin for murdering Grout. The fledgling finds Nines hiding in Griffith Park, and they are then attacked by a werewolf, and Nines is badly injured. The fledgling escapes with Jack, who reveals that LaCroix has issued an execution order on the fledgling for framing Nines on Ming-Xiao's orders.
In the sugar analogues of dapagliflozin, the β-C series are more active than α-C series so the β-configuration must be at C-1 for the inhibitory activity. Both dapagliflozin and empagliflozin contain a chlorine (Cl) atom in their chemical structure. Cl is a halogen and it has a high electronegativity. This electronegativity withdraws electrons from the bonds, and therefore it reduces the metabolism. The Cl atom also reduces the IC50 value of the medication, so the medication has better activity. The carbon-fluorine bond (C-F) also has a very low electron density.
Sources: en.wikipedia.org
=== Organisation (Pre-2018) === Transportation Corps Headquarters Logistics office - Headquarters in 21 Huixin West Street, Chaoyang district, Beijing 1st Transportation Corps 1st Transportation Detachment 2nd Transportation Detachment 3rd Transportation Detachment 2nd Transportation Corps - Headquartered in Kashgar 4th Transportation Detachment 5th Transportation Detachment 6th Transportation Detachment 7th Transportation Detachment - Headquartered in Qinhuangdao 8th Transportation Detachment - Jurisdiction area Xinjiang-Tibet Highway between Rutog County and Saga County
=== Intravenous fluids === In those with poor tissue perfusion, boluses of isotonic crystalloid solution should be given. In children with more than 10–20% TBSA (Total Body Surface Area) burns, and adults with more than 15% TBSA burns, formal fluid resuscitation and monitoring should follow. This should be begun pre-hospital if possible in those with burns greater than 25% TBSA. The Parkland formula can help determine the volume of intravenous fluids required over the first 24 hours. The formula is based on the affected individual's TBSA and weight. Half of the fluid is administered over the first 8 hours, and the remainder over the following 16 hours. The time is calculated from when the burn occurred, and not from the time that fluid resuscitation began. Children require additional maintenance fluid that includes glucose. Additionally, those with inhalation injuries require more fluid. While inadequate fluid resuscitation may cause problems, over-resuscitation can also be detrimental. The formulas are only a guide, with infusions ideally tailored to a urinary output of >30 mL/h in adults or >1mL/kg in children and mean arterial pressure greater than 60 mmHg. While lactated Ringer's solution is often used, there is no evidence that it is superior to normal saline. Crystalloid fluids appear just as good as colloid fluids, and as colloids are more expensive they are not recommended. Blood transfusions are rarely required. They are typically only recommended when the hemoglobin level falls below 60-80 g/L (6-8 g/dL) due to the associated risk of complications.
=== Australia === A study by the Australian National University published in 2022 for Food Standards Australia New Zealand estimated there are 4.67 million cases of food poisoning in Australia each year that result in 47,900 hospitalisations, 38 deaths and a cost to the economy of $2.1 billion. A previous study using different methodology and published in November 2014, found in 2010 that there were an estimated 4.1 million cases of foodborne gastroenteritis acquired in Australia on average each year, along with 5,140 cases of non-gastrointestinal illness. The main causes were norovirus, pathogenic Escherichia coli, Campylobacter spp. and non-typhoidal Salmonella spp., although the causes of approximately 80% of illnesses were unknown. Approximately 25% (90% CrI: 13%–42%) of the 15.9 million episodes of gastroenteritis that occur in Australia were estimated to be transmitted by contaminated food. This equates to an average of approximately one episode of foodborne gastroenteritis every five years per person. Data on the number of hospitalisations and deaths represent the occurrence of serious foodborne illness. Including gastroenteritis, non-gastroenteritis and sequelae, there were an estimated annual 31,920 (90% CrI: 29,500–35,500) hospitalisations due to foodborne illness and 86 (90% CrI: 70–105) deaths due to foodborne illness circa 2010. This study concludes that these rates are similar to recent estimates in the US and Canada. A main aim of this study was to compare if foodborne illness incidence had increased over time.
== Description == The adult lesser mealworm beetle is roughly 6 mm long and widely oval in shape. It is shiny black or brown with reddish brown elytra, the color variable among individuals and changing with age. Much of the body surface is dotted with puncture-like impressions. The antennae are paler at the tips and are covered in tiny, yellowish hairs. The elytra have shallow longitudinal grooves. The eggs are narrow, whitish or tan, and about 1.5 mm long. The larvae somewhat resemble other mealworms, such as the common mealworm (Tenebrio molitor), but are smaller, measuring up to 11 mm long at the final subadult stage. They are tapering and segmented, with three pairs of legs toward the front end, and whitish when newly emerged from the egg and darken to a yellow-brown. They become pale when preparing to molt between instar stages six to 11 instars occur.
Sources: en.wikipedia.org
==== Positive criminology and positive victimology ==== Positive criminology and positive victimology are conceptual approaches, developed by the Israeli criminologist Natti Ronel and his research team, that follow principles of positive psychology and apply them into the fields of criminology and victimology, respectively. Positive criminology and victimology both place an emphasis on social inclusion and on unifying and integrating forces at individual, group, social and spiritual levels that are associated with the limiting of crime and recovery from victimization. In traditional approaches, the study of crime, violence and related behaviors emphasizes the negative aspects in people's lives that are associated with deviance, criminality and victimization. A common understanding is that human relationships are affected more by destructive encounters than by constructive or positive ones. Positive criminology and victimology argue that a different approach is viable, based on three dimensions – social integration, emotional healing and spirituality – that constitute positive direction indicators.
The brewery hired the statistician William Sealy Gosset in 1899, who achieved lasting fame under the pseudonym "Student" for techniques developed for Guinness, particularly Student's t-distribution and the even more commonly known Student's t-test. By 1900 the brewery was operating unparalleled welfare schemes for its 5,000 employees. By 1907 the welfare schemes were costing the brewery £40,000 a year, which was one-fifth of the total wages bill. The improvements were suggested and supervised by Sir John Lumsden. By 1914, Guinness was producing 2.652 million barrels of beer a year, which was more than double that of its nearest competitor Bass, and was supplying more than 10 per cent of the total UK beer market. When World War I broke out in 1914, employees at Guinness St. James Brewery were encouraged to join the British forces. Over 800 employees served in the war. This was made possible due to a number of measures put in place by Guinness: soldiers' families were paid half wages, and jobs were guaranteed upon their return. Of the 800 employees who fought, 103 did not return. During World War II, the demand for Guinness among the British was one of the main reasons why the UK lifted commerce restrictions imposed in 1941 to force Ireland into supporting the Allied Powers. Before 1939, if a Guinness brewer wished to marry a Catholic, his resignation was requested.
In Half-Life: Blue Shift, Rosenberg makes his first appearance during the Hazard Course tutorial, long before Calhoun encounters him in the train yards. He can be seen behind the observer's window during the duck-jump portion of the training. Sometime between Gina and Colette's last sight of Rosenberg in Decay and Calhoun's eventual rescue of the scientist in Blue Shift, he tries to enact an escape plan to get out of Black Mesa with the help of several other scientists. During this time, he is captured by soldiers and held captive in a freight car for questioning, while a colleague, Harold, is cornered and fatally wounded. Before Harold dies, Barney Calhoun discovers him, and he instructs Calhoun to find Dr. Rosenberg to help him with his plan. Calhoun is able to reach the train yards and free Dr. Rosenberg. Rosenberg informs him that their plan is to use the equipment in the prototype labs to teleport to safety. He leads Calhoun to the unused part of the complex where two other scientists, Walter Bennett and Simmons, are already preparing the machine. Rosenberg instructs Calhoun that he must activate and align a relay device on Xen in order for them to be able to accurately set their destination. Calhoun travels to Xen and is successful in accomplishing this task, but after returning through the portal back to Earth (it is here that Gina and Colette in Decay, temporarily caught in a harmonic reflux, hear Rosenberg's voice calling Calhoun through the portal), they discover that they need another power cell to replenish the teleporter's power for their escape.
Sources: en.wikipedia.org
No. It is a laboratory-made analog of growth hormone-releasing hormone. The natural hormone is a 44-residue peptide, while the analog is built on a shorter 29-residue fragment.
The original material included a linker that binds serum albumin. A later variant removed that linker to reduce the duration of action. Catalogs and papers did not consistently adopt separate names, so both remain widely labeled with the same term.
The amino acid sequence and the presence or absence of the linker group. Mass measured by spectrometry gives an independent check that separates the two forms.
It binds the growth hormone-releasing hormone receptor on pituitary somatotroph cells. Receptor activation raises cyclic AMP and promotes release of stored growth hormone granules. Because the peptide persists longer than natural releasing hormone, stimulation is prolonged rather than brief.