Search results

[[File:Quaternary ammonium cation.svg|upright|thumb|[[Quaternary ammonium cation]]. The Rs may be the same or different groups. (The Rs may In [[chemistry]], a '''quaternary compound''' is a compound consisting of exactly four chemical elements. ...

'''Bleach activators''' are compounds that allow a lower washing temperature than would be required otherwise to ...gether in powder laundry detergents that contain bleach. In the wash, both compounds dissolve in the water. When dissolved in water, the persalt releases hydrog ...

...e]]s to quench the [[fluorescence]] of heterocyclic organic compounds with quaternary [[nitrogen]].<ref>{{ ...

...=81|year=1987|doi=10.15227/orgsyn.065.0081|title=Methylenation of Carbonyl Compounds: (+)-3-Methylene-''cis-p''-menthane}}</ref><ref>{{cite journal | last1 = Ma ...e Mannich base is then subjected to methylation or N-oxidation to give a [[Quaternary ammonium cation|trimethylammonium salt]] or [[Amine oxide|amine ''N''-oxide ...

...[[amino acids]].<ref name=handbook /> It is a single [[peptide]] [[Protein quaternary structure|monomer]] that has three β-structural [[Protein domain|domains]]. ===Biomimetic compounds=== ...

...expensive, and are used for specific applications.<ref name=Butt /> These compounds have both positively and negatively charged components. An example of a zwi ...neral, compounds with an HLB between one and four will not mix with water. Compounds with an HLB value above 13 will form a clear solution in water.<ref name="B ...

...ge=1| date=September 2010 |isbn= 9780470541944}}</ref> [[Surfactants]] are compounds that lower the surface tension of a liquid, the interfacial tension between ...aners. Some common cationic surfactants head groups include [[amines]] and quaternary [[ammonium]] ions. ...

====Quaternary ammonium==== ...and didecyldimethylammonium chloride). These last two are membrane-active compounds; against S. aureus the first forms a single monolayer coverage of the S. au ...

Silsesquioxanes have been functionalized with biocidal quaternary ammonium (QASs) groups to produce [[antimicrobial]] coatings. QASs are [[di ...om, B.J. |title=Antimicrobial activity of polysiloxane coatings containing quaternary ammonium-functionalized polyhedral oligomeric silsesquioxane|journal=J. Coa ...

The [[ore]]s used in ancient smelting processes were rarely pure metal compounds. Impurities were removed from the ore through the process of [[slag]]ging, Ancient [[slag]] composition is usually a quaternary [[eutectic]] system CaO-SiO₂-FeO-Al₂O₃ sim ...

...ember of the [[group 10 element|group 10]] of the [[periodic table]]. Most compounds in the group have an [[oxidation state]] of +2. Nickel is classified as a [ ...s, as nickel is adjacent to copper and iron in the periodic table can form compounds with the same structure as the [[high-temperature superconductor]]s that ar ...

Overall, the percent composition of major compounds found in the final glass bead product is shown below.<ref name=":1" /> ...ithin the humic material with arsenic. This is only likely if the amine is quaternary, thus justifying the low pH claim, as similar resins are used to separate A ...

...an intrinsic part of the object, for example materials added as temper, or compounds which have become incorporated into the object during use, such as organic ...ydroxylation dating method: Insights from a new measurement device|journal=Quaternary Geochronology|date=2014|volume=20|pages=89–98|doi=10.1016/j.quageo.2013.12. ...

...oi-access=free }}</ref> Polymeric steric entrapment requires water-soluble compounds containing the desired metal cation (e.g., metal acetates, metal chlorides) ...first3=Jie |last4=Wang |first4=Jingyang |date=2019-07-15 |title=Equiatomic quaternary (Y1/4Ho1/4Er1/4Yb1/4)2SiO5 silicate: A perspective multifunctional thermal ...

...the [[Complex (chemistry)|complex]]. There are two main kinds of complex: compounds formed by the interaction of a metal ion with a ligand and supramolecular c ...phosphate|ATP]], the background electrolyte used will be, for example, a [[Quaternary ammonium cation|tetralkylammonium]] salt. Another example involves iron(III ...

[[Siloxane]]s are compounds known in industry in the form of [[polymer]]s (silicones, R-SiO-R'), for th ...mer solvent" as "a polymer that acts as a solvent for low-molecular weight compounds".<ref>{{Cite journal |last1=Horie |first1=K. |last2=Barón |first2=Máximo |l ...

...ents and thus form many different kinds of binary, ternary, and quaternary compounds and/or segregated phases. Thus, such alloys would possess complicated struc ...em, a multi-component alloy containing them is also likely to form ordered compounds.<ref name="enthalpy effect"/> ...

...ary structure|tertiary structure]], and the [[Protein quaternary structure|quaternary structure]]. ...dary structure prediction is a main focus of this subfield as tertiary and quaternary structures are determined based on the secondary structure.<ref name=":2" / ...

...the significantly higher [[preservation potential]] of biogenic siliceous compounds compared to organic carbon makes opal accumulation records of interest in [ ...le=Origin of Diatom Ooze Belt in the Southern Ocean: Implications for Late Quaternary Paleoceanography|journal=Micropaleontology|volume=33|issue=1|pages=82|doi=1 ...

...00121a010|pmid=1737021|citeseerx=10.1.1.539.2952}}</ref> or identify small compounds,<ref>{{Cite journal|last1=Caligiani|first1=A.|last2=Acquotti|first2=D.|last ...=10.1016/0016-7037(80)90155-6|bibcode=1980GeCoA..44..649S}}</ref> as these compounds are easily separated. Another advantage of methane for compound-specific me ...