zwitterion comes up often in conversation and rarely with the context attached. Here we lay out the basics in order, then work through the practical considerations.
Last reviewed on 2026-08-01. Where a claim depends on a specific study, the study is described rather than over-claimed.
Commercial creatine monohydrate is typically a white to off-white powder with low odor. It is commonly sold as a fine powder, micronized powder, or larger crystals, but these are physical forms of the same chemical. Purity grades vary, and products may contain small amounts of related substances such as creatinine, dicyandiamide, or moisture. The monohydrate is often selected for supplements and research because its production is well established and its behavior in water is predictable. Analytical certificates usually report assay, loss on drying, and heavy metals.
Creatine monohydrate is a crystalline compound formed from creatine and one water molecule in its solid lattice. Creatine itself is a nitrogen-containing organic acid involved in energy transfer in muscle and other tissues. The monohydrate form is the most common solid form used in research and commercial products because it is stable and easy to handle. The term "monohydrate" refers to the fixed one-to-one ratio of water to creatine in the crystal, not to moisture content. This distinction matters when comparing labels or calculating creatine content.
Creatine monohydrate is sold as a dietary ingredient in some countries and as a food supplement in others. Regulatory frameworks vary, so purity limits, labeling rules, and permitted claims are not globally uniform. In the United States, it falls under dietary supplement rules, whereas the European Union treats it as a food supplement ingredient. Pharmacopeial monographs, where they exist, can provide public quality standards, but not every product is required to meet them. Questions about long-term effects and patterns of use remain areas of active study rather than settled regulatory findings.
Solid creatine monohydrate is generally stable when kept cool and dry, but it can hydrolyze to creatinine over time. Moisture, heat, and acidic conditions accelerate this conversion, which reduces assay values and changes the material's properties. Creatinine is a cyclic dehydration product that is also a normal human metabolite, so its presence in a sample is not necessarily a health concern by itself. In quality testing, creatinine is monitored as a marker of degradation and purity.
| Property | Value | Notes |
|---|---|---|
| Chemical name | N-(aminoiminomethyl)-N-methylglycine monohydrate | Nomenclature varies across sources. |
| Common synonyms | Creatine hydrate; creatine monohydrate | “Monohydrate” specifies one water per creatine. |
| Appearance | White to off-white crystalline powder | Particle size and flowability vary by grade. |
| Solubility class | Soluble in water; slightly soluble in ethanol | Dissolution increases with temperature and stirring. |
| Typical storage | Tightly closed container at 15–25 °C | Protect from moisture and excessive heat. |
Identity and purity are commonly assessed by high-performance liquid chromatography, often with ultraviolet detection, and by spectroscopic techniques such as infrared or nuclear magnetic resonance. These methods can distinguish creatine from creatinine and detect related impurities. Moisture content may be measured by Karl Fischer titration or loss on drying. Particle size, bulk density, and heavy metal limits are additional quality parameters. Not every product is tested by every method, so specifications depend on the intended use and regulatory framework.
Solid creatine monohydrate is generally stable when kept dry and protected from extremes of heat and humidity. In the presence of moisture, it can gradually convert to creatinine, a cyclic dehydration product that has little value for phosphocreatine synthesis. Elevated temperatures and acidic conditions accelerate this conversion in solution. Because the reaction is slow in cool, dry storage, typical shelf lives are measured in years rather than weeks. Packaging that limits moisture and oxygen exposure helps maintain purity.
Recommended storage usually involves a sealed container kept at room temperature, away from direct sunlight and moisture. High humidity can cause caking, which changes flow properties and may complicate accurate weighing. Repeated opening of containers exposes the powder to air and moisture, so smaller aliquots can reduce handling effects. Storage temperature ranges are not absolute requirements; they reflect conditions that slow degradation and preserve consistent physical characteristics. Clean, dry tools help prevent contamination during sampling.
From the incorporation of Scarborough as a township in 1850, the head of the local government was a reeve who chaired the town council. In 1953, Scarborough and twelve other townships, towns, and villages in York County federated with the City of Toronto to form Metropolitan Toronto. Scarborough retained its own town council but an added layer of government, the Metropolitan Toronto Council, with the reeve of Scarborough having a seat. In 1967, Scarborough was incorporated as borough at which point the head of the local government was styled as mayor. A Board of Control, consisting of the mayor and four directly elected Controllers, was also created as an executive committee of Scarborough's council, whose members also sat on Metro Council. In 1973, Scarborough opened its new city hall, the Scarborough Civic Centre where the borough and later its city council met. In 1983, Scarborough attained city status, but its governing structure remained the same. In 1988, the Board of Control was abolished. In 1998, the municipalities of Metropolitan Toronto were dissolved and amalgamated into a single City of Toronto. Since then, Scarborough has been a community within the city of Toronto, and the head of the local government is the Mayor of Toronto and is governed by Toronto City Council. Community councils were formed to process issues considered local to their communities. Scarborough's community council, made up of the district's local councillors, meets once a month at the Civic Centre.
== Types == Various patterns of measured patient temperatures have been observed, some of which may be indicative of a particular medical diagnosis: Continuous fever, where temperature remains above normal and does not fluctuate more than 1 °C in 24 hours (e.g. in bacterial pneumonia, typhoid fever, infective endocarditis, tuberculosis, or typhus). Intermittent fever is present only for a certain period, later cycling back to normal (e.g., in malaria, leishmaniasis, pyemia, sepsis, or African trypanosomiasis). Remittent fever, where the temperature remains above normal throughout the day and fluctuates more than 1 °C in 24 hours (e.g., in infective endocarditis or brucellosis). Pel–Ebstein fever is a cyclic fever that has been seen occasionally in patients with Hodgkin's lymphoma. Undulant fever, seen in brucellosis. Typhoid fever is a continuous fever showing a characteristic step-ladder pattern, a step-wise increase in temperature with a high plateau. Among the types of intermittent fever are ones specific to cases of malaria caused by different pathogens. These are:
==== Postmenopausal ==== During postmenopause, due to much lower levels of estrogen, and due to lower levels of GH and IGF-1, which decrease with age, mammary gland tissue atrophies and the mammary glands become smaller.
For example, sodium o-phenylphenate-resistant strains are dealt with via formaldehyde fumigation, while imazalil-resistant strains are controlled through the use of pyrimethanil, a fungicide also approved for fighting strains resistant to other fungicides. As fungicide resistance increases globally, other measures of control are being considered, including that of biocontrol. Effective biocontrol agents include bacteria such as Bacillus subtilis, Pseudomonas cepacia, and Pseudomonas syringae as well as fungi such as Debaryomyces hansenii and Candida guilliermondii. In Clementines and Valencia oranges, Candida oleophila, Pichia anomala, and Candida famata have been shown to reduce disease. Despite the ability of various biocontrol agents to exhibit antagonistic activity, biocontrol has not been shown to provide complete control over P.digitatum, and is therefore commonly used in conjunction with another measure of control. Alternative measures of control include essential oils such as Syzygium aromaticum and Lippia javanica, ultraviolet light, gamma-irradiation, X-ray curing, vapour heat, and cell-penetrating anti-fungal peptides.
== Geography == Yavne is a city in the Central District of Israel, located about six kilometers from the Mediterranean Sea in the southern coastal plain region, on the eastern border of the Yavne sand dunes. It is situated between the moshav of Ben Zakai to the south, Ashdod, Gan Yavne, Hazor Ashdod, and Nitzanim to the southwest, Gan Raveh and Kfar HaNagid to the north, Givat Brenner to the east, Bait Gamliel to the southeast, Rehovot to the east-southeast, and Gealya to the northeast.
Sources: en.wikipedia.org
In 1949, a deep water survey reported anomalously hot brines in the central portion of the Red Sea. Later work in the 1960s confirmed the presence of hot, 60 °C (140 °F), saline brines and associated metalliferous muds. The hot solutions were emanating from an active subseafloor rift. The highly saline character of the waters was not hospitable to living organisms. The brines and associated muds are currently under investigation as a source of mineable precious and base metals.
== Political advocacy == Since the 2010s, Schumer has been an active celebrity presence in liberal politics, endorsing Democratic Party candidates and sometimes making appearances with her cousin Chuck Schumer. On October 4, 2018, Schumer was arrested at the U.S. Capitol while protesting the nomination of Brett Kavanaugh as an Associate Justice of the U.S. Supreme Court. Schumer has used her role as a comedian to encourage higher voter turnout and spread awareness about voter ID laws. Prior to the 2022 midterm elections, she worked with voter ID education and assistance organization VoteRiders to raise awareness of local ID requirements. Schumer supported Andrew Cuomo during the 2025 New York City mayoral election. Schumer had previously supported Cuomo during the 2018 New York gubernatorial election before supporting his opponent Cynthia Nixon, then switching back to Cuomo. She praised the eventual winner Zohran Mamdani for condemning the painting of swastikas on a Jewish day school in Brooklyn, writing, "The Jewish community is looking forward to having your support, Mayor-Elect [Mamdani]... a united NYC is a stronger, better NYC".
In humans, the lungs are located in the chest on either side of the heart in the rib cage. They are conical in shape with a narrow rounded apex at the top, and a broad concave base that rests on the convex surface of the diaphragm. The apex of the lung extends into the root of the neck, reaching shortly above the level of the sternal end of the first rib. The lungs stretch from close to the backbone in the rib cage to the front of the chest and downwards from the lower part of the trachea to the diaphragm. The left lung shares space with the heart, and has an indentation in its border called the cardiac notch of the left lung to accommodate this. The front and outer sides of the lungs face the ribs, which make light indentations on their surfaces. The medial surfaces of the lungs face towards the centre of the chest, and lie against the heart, great vessels, and the carina where the trachea divides into the two main bronchi. The cardiac impression is an indentation formed on the surfaces of the lungs where they rest against the heart. Both lungs have a central recession called the hilum, where the blood vessels and airways pass into the lungs making up the root of the lung. There are also bronchopulmonary lymph nodes on the hilum. The lungs are surrounded by the pulmonary pleurae. The pleurae are two serous membranes; the outer parietal pleura lines the inner wall of the rib cage and the inner visceral pleura directly lines the surface of the lungs. Between the pleurae is a potential space called the pleural cavity containing a thin layer of lubricating pleural fluid.
== History == Vertex Pharmaceuticals announced in January 2024 that suzetrigine had successfully met several endpoints in its phase III clinical trials. The company announced in July 2024 that the US Food and Drug Administration (FDA) had accepted a New Drug Application for suzetrigine. Due to its novel mechanism, the FDA granted priority review, fast track, and breakthrough therapy designations to the application for suzetrigine. In January 2025, the FDA granted approval of Journavx to Vertex Pharmaceuticals, making it the first non-opioid pain medication to be approved by the FDA in two decades. As of November 2025, phase IV post-marketing clinical trials are underway to assess the effectiveness and safety of suzetrigine as a part of multimodal therapy for the treatment of acute post-operative pain. The manufacturer engaged in lobbying activity promoting non-opioid pain treatment and supporting the NO PAIN Act (Non-Opioids Prevent Addiction In the Nation Act).
Chanterelles are common in Eurasia, North America (including Central America) and Africa. In the American Pacific Northwest, they can be found from July to November. They tend to grow in clusters in mossy coniferous forests, but are also often found in mountainous birch forests and among grasses and low-growing herbs. In central Europe, the golden chanterelle is often found in beech forests among similar species and forms. In the UK, they may be found from July through December.
Sources: en.wikipedia.org
4-Aminophenol may be obtained by the amide hydrolysis of paracetamol. This reaction is also used to determine paracetamol in urine samples: After hydrolysis with hydrochloric acid, 4-aminophenol reacts in ammonia solution with a phenol derivate, e.g. salicylic acid, to form an indophenol dye under oxidization by air.
==== Hypothetical origin ==== The top half of tRNA (consisting of the T arm and the acceptor stem with 5′-terminal phosphate group and 3′-terminal CCA group) and the bottom half (consisting of the D arm and the anticodon arm) are independent units in structure as well as in function. The top half may have evolved first including the 3′-terminal genomic tag which originally may have marked tRNA-like molecules for replication in early RNA world. The bottom half may have evolved later as an expansion, e.g. as protein synthesis started in RNA world and turned it into a ribonucleoprotein world (RNP world). This proposed scenario is called genomic tag hypothesis. In fact, tRNA and tRNA-like aggregates have an important catalytic influence (i.e., as ribozymes) on replication still today. These roles may be regarded as 'molecular (or chemical) fossils' of RNA world. In March 2021, researchers reported evidence suggesting that an early form of transfer RNA could have been a replicator ribozyme molecule in the very early development of life, or abiogenesis. Evolution of type I and type II tRNAs is explained to the last nucleotide by the three 31 nucleotide minihelix tRNA evolution theorem, which also describes the pre-life to life transition on Earth. Three 31 nucleotide minihelices of known sequence were ligated in pre-life to generate a 93 nucleotide tRNA precursor.
=== Selective DNA isolation === PCR allows isolation of DNA fragments from genomic DNA by selective amplification of a specific region of DNA. This use of PCR augments, such as generating hybridization probes for Southern or northern hybridization and DNA cloning, which require larger amounts of DNA, representing a specific DNA region. PCR supplies these techniques with high amounts of pure DNA, enabling analysis of DNA samples even from very small amounts of starting material. Other applications of PCR include DNA sequencing to determine unknown PCR-amplified sequences in which one of the amplification primers may be used in Sanger sequencing, isolation of a DNA sequence to expedite recombinant DNA technologies involving the insertion of a DNA sequence into a plasmid, phage, or cosmid (depending on size) or the genetic material of another organism. Bacterial colonies (such as E. coli) can be rapidly screened by PCR for correct DNA vector constructs. PCR may also be used for genetic fingerprinting; a forensic technique used to identify a person or organism by comparing experimental DNAs through different PCR-based methods.
=== Highly controllable properties === Porous silicon studies conducted in 1995 showed that the behaviour of porous silicon can be altered in between "bio-inert", "bioactive" and "resorbable" by varying the porosity of the silicon sample. The in-vitro study used simulated body fluid containing ion concentration similar to the human blood and tested the activities of porous silicon sample when exposed to the fluids for prolonged period of time. It was found that high porosity mesoporous layers were completely removed by the simulated body fluids within a day. In contrast, low to medium porosity microporous layers displayed more stable configurations and induced hydroxyapatite growth.
Sources: en.wikipedia.org
It is a solid form of creatine that contains one water molecule per creatine molecule in the crystal lattice. The hydrate water is part of the crystal structure rather than loose moisture. The term is often used for the common crystalline powder grade.
Creatine anhydrous lacks the water of crystallization and therefore contains a higher creatine fraction by mass. The monohydrate is more common in commerce and research because it is stable and easy to handle. The two forms are not identical in solid state, though both yield creatine when dissolved.
Creatine is the base molecule, while creatine monohydrate is a hydrate of that molecule. Once dissolved, the hydrate water becomes part of the solvent and free creatine is present. In casual usage the names are often shortened to creatine, but the solid forms differ.
A sealed container kept at room temperature and away from moisture is typical. Heat and humidity promote conversion to creatinine and can reduce assay values. Long-term storage under dry conditions helps maintain the original crystalline form.