This is a working overview of FTIR spectroscopy, written for readers who want more than a one-paragraph summary but less than a textbook.
This page was last updated on 2026-01-08 and is reviewed periodically as new material appears.
Quality control for creatine monohydrate typically combines identity, assay, and impurity tests. High-performance liquid chromatography with ultraviolet detection is common for separating creatine from creatinine and related substances. Nuclear magnetic resonance and infrared spectroscopy can confirm molecular structure, while titration may assess acid-base content. Moisture content, heavy metals, residual solvents, and microbial limits are checked according to applicable standards. These tests help distinguish compliant material from powders that have degraded, been diluted, or contain manufacturing residues.
Handling practices aim to limit moisture uptake and thermal exposure. Containers should stay closed when not in use, and storage areas should avoid direct sunlight, strong heat, and high humidity. Caking can occur when powder absorbs water, even if the creatine itself has not fully degraded. Aqueous stock solutions are best prepared fresh when needed because they are less stable than the solid. Open questions include how different excipients, packaging materials, and climate conditions affect long-term stability across global supply chains.
Creatine monohydrate is a crystalline compound formed from creatine and one molecule of water. Its systematic name is N-(aminoiminomethyl)-N-methylglycine monohydrate, and it appears as a white, odorless powder with limited solubility in water. The monohydrate is the most common solid form used in research and commercial products because it is stable under dry conditions. The anhydrous form lacks the water of crystallization and differs slightly in molar mass. Both forms participate in the same biochemical reactions once dissolved.
In the body, creatine is synthesized from the amino acids arginine, glycine, and methionine, primarily in the liver and kidneys. It is transported to muscle and other tissues, where it is phosphorylated to phosphocreatine by creatine kinase. This phosphagen system provides a rapid source of adenosine triphosphate during short, intense contractions. Dietary creatine comes mainly from meat and fish, and the body's total pool is influenced by both synthesis and intake.
| Property | Value | Notes |
|---|---|---|
| Typical storage temperature | 15–25 °C | Cool, dry, sealed |
| Relative humidity | Below 60% | Moisture promotes caking and degradation |
| Degradation product | Creatinine | Forms by cyclization, especially in solution |
| Assay method | HPLC with UV detection | Often paired with identity tests |
| Aqueous stability | Hours to days at room temperature | Depends on pH, temperature, concentration |
Manufacturing processes can leave trace amounts of dicyandiamide, creatinine, or residual solvents, depending on the synthetic route and purification steps. Heavy metals, arsenic, and microbial contamination are also monitored for food or pharmaceutical grades. Particle size distribution can affect dissolution behavior and blending uniformity, so it may be specified for certain applications. Analytical results are reported on a dry basis or as-is basis, and the difference matters when comparing certificates of analysis. Open questions remain about how minor impurities influence long-term stability under varied storage conditions.
Stability studies typically examine the effects of temperature, humidity, and light on creatine monohydrate. Sealed containers stored in cool, dry conditions help limit moisture uptake and hydrolysis. Elevated temperature and high relative humidity can accelerate conversion to creatinine, especially in aqueous solutions. In solid dosage forms, excipients and processing steps may also affect stability. Published stability data are not fully consistent across studies because test conditions and analytical methods vary.
Quality control of creatine monohydrate relies on a combination of identity, purity, and moisture tests. High-performance liquid chromatography with ultraviolet detection is widely used to separate creatine from creatinine and other related nitrogenous compounds. Spectroscopic methods such as infrared and nuclear magnetic resonance provide structural confirmation. Because the material is a hydrate, water content is measured separately, often by Karl Fischer titration. These tests together establish whether a lot meets a defined specification.
Creatine monohydrate is one of several solid forms of creatine described in the literature. Other forms include anhydrous creatine, creatine hydrochloride, and creatine ethyl ester, each with different solubility and stability characteristics. The monohydrate is distinct from creatinine, a spontaneous breakdown compound that forms when creatine loses water and cyclizes. Commercial descriptions sometimes use synonyms such as methylguanidoacetic acid or N-(aminoiminomethyl)-N-methylglycine, which refer to the same base molecule. These names appear in chemical databases and product labels.
Creatine monohydrate is a crystalline compound formed when one molecule of creatine binds with one molecule of water. Creatine itself is a nitrogen-containing organic acid involved in cellular energy transfer, particularly in muscle and nerve tissue. The monohydrate form is the most common solid form used in research and commercial products because it is relatively stable and easy to handle. Its molecular formula is C4H9N3O2·H2O, and its molar mass is about 149.15 grams per mole.
In the human body, creatine is synthesized mainly in the liver and kidneys from the amino acids glycine, arginine, and methionine. Dietary sources include meat, fish, and other animal tissues, which supply preformed creatine. Because plant foods contain little or no creatine, dietary intake varies widely among populations. The compound is stored largely in skeletal muscle, where it is converted to phosphocreatine and used to regenerate adenosine triphosphate during short bursts of activity.
The compound was identified in the nineteenth century after chemists isolated a nitrogenous substance from meat extracts. Later work established its role in muscle energy metabolism and its conversion to phosphocreatine. Chemical synthesis of creatine followed, and industrial production made the monohydrate widely available as a purified powder. Interest expanded in the late twentieth century when researchers began studying creatine supplementation and muscle physiology. Historical accounts sometimes differ on exact dates and attributions, but the broad sequence from tissue extracts to synthetic production is well documented.
In the body, creatine is obtained from dietary meat and fish and is also synthesized from arginine, glycine, and methionine. Muscle stores creatine and phosphocreatine, which participate in the rapid regeneration of adenosine triphosphate during short, intense activity. The monohydrate form is used in research because it is chemically defined, stable as a dry solid, and relatively inexpensive to produce. Questions remain about whether other creatine forms offer meaningful advantages in absorption or tissue retention, and findings vary across studies and populations.
In the case of periarticular HS which occurs in the subsynovial tissues of the extremities, amputation of the affected limb is enforced by the inoperable nature of the primary lesion which ensnares structures vital to limb function. Disseminated HS (including MH) is not readily treated surgically, since even in the splenic form, early metastasis to the liver has often occurred. Response to chemotherapy has been at best brief, and the disease progresses rapidly (weeks to months) to death or euthanasia. Morphological Features of HS Gross appearance. Lesions of HS are typically destructive mass lesions with a uniform, smooth cut surface and are white/cream to tan in color. Lesions have a soft consistency and may contain discolored areas (typically yellow) which indicate area of necrosis, which can be extensive. Lesions can be solitary or multiple within an organ (especially spleen). Periarticular HS has a distinctive appearance: it occurs as multiple tan nodules located in the subsynovium. These lesions may encircle the affected joint. Hemophagocytic HS does not initially form mass lesions in the primary sites (spleen and bone marrow). Typically, diffuse splenomegaly is observed; the cut surface is dark red and the consistency is firm. The liver is usually bile stained (jaundice) and disruption of the lobular pattern due to metastasis is observed — marked liver involvement can occur before destructive masses are noticeable. Immunophenotypic Studies MH and HS lesions express leukocyte surface molecules characteristic of DC (CD1, CD11c and MHC II).
About the same time as blotter paper, LSD came "Windowpane" (AKA "Clearlight"), which contained LSD inside a thin gelatin square a quarter of an inch (6 mm) across. LSD has been sold under a wide variety of often short-lived and regionally restricted street names, including Acid, Trips, Uncle Sid, Blotter, Lucy, Alice and doses, as well as names that reflect the designs on the sheets of blotter paper. Authorities have encountered the drug in other forms—including powder or crystal, and capsule.
Umetaro Suzuki (鈴木 梅太郎, Suzuki Umetarō; April 7, 1874 – September 20, 1943) was a Japanese scientist, born in what is now part of Makinohara, Shizuoka, Japan. He was a member of the Imperial Academy, and a recipient of the Grand Cordon of the Order of the Sacred Treasure and the Order of Culture. His research was among the earliest of modern vitamin research.
Sources: en.wikipedia.org
In one pathway, arginine is converted into agmatine. The conversion is catalyzed by the enzyme arginine decarboxylase (ADC). Agmatine is transformed into N-carbamoylputrescine by agmatine imino hydroxylase (AIH). Finally, N-carbamoylputrescine is hydrolyzed to give putrescine. In the second pathway, arginine is converted into ornithine and then ornithine is converted into putrescine by ornithine decarboxylase (ODC). Putrescine, via metabolic intermediates including N-acetylputrescine, γ-aminobutyraldehyde (GABAL), N-acetyl-γ-aminobutyric acid (N-acetyl-GABAL), and N-acetyl-γ-aminobutyric acid (N-acetyl-GABA), biotransformations mediated by diamine oxidase (DAO), monoamine oxidase B (MAO-B), aminobutyraldehyde dehydrogenase (ABALDH), and other enzymes, can act as a minor biological precursor of γ-aminobutyric acid (GABA) in the brain and elsewhere. In 2021, it was discovered that MAO-B does not mediate dopamine catabolism in the rodent striatum but instead participates in striatal GABA synthesis and that synthesized GABA in turn inhibits dopaminergic neurons in this brain area. It has been found that MAO-B, via the putrescine pathway, importantly mediates GABA synthesis in astrocytes in various brain areas, including in the hippocampus, cerebellum, striatum, cerebral cortex, and substantia nigra pars compacta (SNpc).
It would tax retirement benefits, creating a 5% pay cut for somebody under the system, while also undermining the merit-based civil service by having an additional 5% cut if you decide to retain those merit-based civil service protections. Those protections don't exist for the purpose of the employee – they exist to protect against politically based firings of federal employees. American Federation of Government Employees (AFGE) national president Everett Kelley stated that:
Vox noted in 2018 that bullies and trolls were relatively rare on TikTok compared to other platforms. Nonetheless, several users have reported cyberbullying via features such as Duet or React, which is used to interact with followers. A trend making fun of autism eventually created a huge backlash, even on the platform itself, and the company ended up removing the hashtag altogether. Parents filming how their children reacted to people with disability, often in terror, led to criticisms of ableism. In December 2019, following a report by German digital rights group netzpolitik.org, TikTok admitted that it had suppressed videos by disabled users as well as LGBTQ+ users in a purported temporary effort to limit cyberbullying. TikTok: Murder Gone Viral, a documentary series produced by ITV, highlights how cyberbullying and TikTok's role as a social media platform has led to the murder of certain individuals.
== Research of Threonine as a Dietary Supplement in Animals == Effects of threonine dietary supplementation have been researched in broilers. An essential amino acid, threonine is involved in the metabolism of fats, the creation of proteins, the proliferation and differentiation of embryonic stem cells, and the health and function of the intestines. Animal health and illness are strongly correlated with the need for and metabolism of threonine. Intestinal inflammation and energy metabolism disorders in animals may be alleviated by appropriate amounts of dietary threonine. Nevertheless, because these effects pertain to the control of nutrition metabolism, more research is required to confirm the results in various animal models. Furthermore, more research is needed to understand how threonine controls the dynamic equilibrium of the intestinal barrier function, immunological response and gut flora.
Sources: en.wikipedia.org
Malonylation occurs mainly in mitochondria but also in the cytosol and nucleus. In mouse liver, about 60% of malonylated proteins are mitochondrial, whereas in human fibroblasts the distribution is more even. Succinylation and glutarylation are likewise enriched in mitochondria but not exclusive to them. The relative abundance of these modifications reflects acyl-CoA availability: acetylation is most common, succinylation reaches 10–30 % of acetylation levels, malonylation is at least tenfold less frequent, and glutarylation occurs only in trace amounts. In addition to their differing frequencies, malonylation, succinylation, and acetylation can also target the same lysine site. In mouse liver mitochondria, about 85 % of succinylation sites overlap with at least one of these modifications, and ~6 % can contain all three, mainly in proteins involved in fatty acid oxidation, glutaryl-CoA degradation, and ketogenesis. In contrast, only 55 % of malonylation sites overlap with succinylation, while about 45 % are unique. These distinct patterns suggest a specific regulatory role for malonylation among lysine acyl modifications.
==== Metabolism of glucose ==== Cortisol regulates glucose metabolism and promotes gluconeogenesis (glucose synthesis) in the liver, producing glucose to provide to other tissues. It also increases blood glucose levels by reducing glucose uptake in muscle and adipose tissue, decreasing protein synthesis, and increasing the breakdown of fats into fatty acids (lipolysis). All of these metabolic steps have the net effect of increasing blood glucose levels, which fuel the brain and other tissues during the fight-or-flight response. Cortisol is also responsible for releasing amino acids from muscle, providing a substrate for gluconeogenesis. Its impact is complex and diverse. In general, cortisol stimulates gluconeogenesis (the synthesis of 'new' glucose from non-carbohydrate sources, which occurs mainly in the liver, but also in the kidneys and small intestine under certain circumstances). The net effect is an increase in the concentration of glucose in the blood, further complemented by a decrease in the sensitivity of peripheral tissue to insulin, thus preventing this tissue from taking the glucose from the blood. Cortisol has a permissive effect on the actions of hormones that increase glucose production, such as glucagon and adrenaline. Cortisol also plays an important, but indirect, role in liver and muscle glycogenolysis (the breaking down of glycogen to glucose-1-phosphate and glucose) which occurs as a result of the action of glucagon and adrenaline.
==== Initial loans ==== Townsend entered the senior Tottenham team under manager Harry Redknapp. In August 2009, he went on a month's loan to League One club Leyton Orient, extended at the end of the month to the end of December, after which he returned to Tottenham. In 26 appearances for Orient, Townsend scored twice, including a "great goal" in a 3–3 draw against Yeovil, passing three opposing players with a run that began in his own half, leading the opposition manager to lament that his players had not been more ruthless and taken him down with a professional foul. Having not yet made his Tottenham debut, on 14 January 2010, Townsend was again taken on loan by a League One club, Milton Keynes Dons, until the end of the season, although he was recalled after just two months due to injuries. In nine matches for the Dons he had scored twice. The season ended without Townsend having made his debut for Tottenham. On 12 August 2010, Townsend signed another season-long loan, moving up to the Championship level with Ipswich Town, but this was terminated on 20 December, as Redknapp believed he had not been playing regularly enough. He had played 16 times, scoring once.
=== Penicillin units === One unit of penicillin G sodium is defined as 0.600 micrograms. Therefore, 2 million units (2 megaunits) of penicillin G is 1.2 g. One unit of penicillin V potassium is defined as 0.625 micrograms. Therefore 400,000 units of penicillin V is 250 mg. The use of units to prescribe penicillin is largely obsolete outside of the US. Since the original penicillin was an ill-defined mixture of active compounds (an amorphous yellow powder), the potency of penicillin varied from batch to batch. It was therefore impractical to prescribe 1 g of penicillin because the activity of 1 g of penicillin from one batch would be different from the activity from another batch. To address this problem, after manufacture, each batch of penicillin was standardised against a known unit of penicillin: each glass vial was then filled with the number of units required. In the 1940s, a vial of 5,000 Oxford units was standard, but the depending on the batch, could contain anything from 15 mg to 20 mg of penicillin. Later, a vial of 1,000,000 international units became standard, and this could contain 2.5 g to 3 g of natural penicillin (a mixture of penicillin I, II, III, and IV and natural impurities). With the advent of pure penicillin G preparations (a white crystalline powder), there is little reason to prescribe penicillin in units, although units are still used for benzathine benzylpenicillin in the United States. The "unit" of penicillin has had three previous definitions, and each definition was chosen as being roughly equivalent to the previous one.
=== 2025 elections === On October 5, 2024, Duterte announced that he will run for mayor of Davao City, with his son, incumbent Mayor Sebastian Duterte, as his running mate for vice mayor in 2025. He also rejected calls for him to run for senator, citing his old age. Duterte officially filed his candidacy on October 7; however, on November 7, he welcomed the candidacy of his former cabinet secretary, former Civil Service Commission chairperson Karlo Nograles as Davao City mayor, adding he is retired and wishes to give the position to the next generation. In May 2025, Duterte was elected as mayor despite his detention at The Hague by the ICC. However, he was unable to take his oath on the start of his term on June 30, 2025, due to his imprisonment. As a result, his son Sebastian, who was elected vice mayor, became acting mayor. On January 23, 2026, Sebastian was sworn in as mayor of Davao City, following his father's failure to take the oath of office within the six-month prescribed period due to his detention.
Sources: en.wikipedia.org
Keep it in a sealed container in a cool, dry place away from direct heat and moisture. Dry powder is more stable than prepared solutions.
It can cyclize into creatinine, particularly in water or under heat. Creatinine does not support phosphocreatine energy buffering in the same way.
Laboratories commonly use chromatographic methods such as HPLC, along with spectroscopy and titration, to confirm identity and quantity. Moisture, elemental impurities, and microbial limits may also be tested.
It is a compound made of creatine bound to one water molecule. It appears as a white crystalline powder and is the most common solid form of creatine used in research and supplements.