(1943) n. Any of several small granular or bead-like resins consisting of two principal parts: a resinous matrix serving as a structural portion, and an ion-active group serving as the functional portion. The functional group may be acidic or basic. Complete deionization of water is ...
Science Why are the alpha-hydrogens in an aldehyde or ketone more acidic than any of the other hydrogens?Question:Why are the alpha-hydrogens in an aldehyde or ketone more acidic than any of the other hydrogens?Alpha HydrogenAlpha Hydrogen is the hydrogen th...
The acidic milieu in the blood may reach a pH of below 7.30 or even below 7.10. The association of enhanced ketone body production and decreased buffering capacity of blood may also lead to ketoacidosis in patients with type 2 diabetes or even in the absence of hyperglycemia, such as during...
Photolysis in strongly acidic medium gave rise to cleavage with substitution. 1,2-Benzisoxazole when irradiated in 96% H2SO4 gave two phenones which had hydroxyl substituents in the 3- or 5-position. Photolysis of 3-methyl-1,2-benzisoxazole in 96% H2SO4 gave similar products. The utilizat...
All crosslinked materials showed surprising resistance to hot oily, acidic and basic media, as well as excellent thermal stability. Furthermore, these materials were more rubbery at high temperature than commercial thermoplastic Victrex® 151G.
In terms of the potential applications of HBPs, our research group has been particularly interested in hyperbranched aromatic polymers with acidic functional groups. Such polymers will exhibit acidic functionality in various environments because of their high thermal and chemical stabilities. For instance,...
the time required is typically several seconds to several hours, preferably 10 to 20 seconds. If an acidic solution has been used, the fibers may be passed through water to remove residual acid (extractive dilution) or passed through a basic solution to remove and/or neutralize residual acid....
(usually VV, MoVI, and/or WVI) and a Lewis acidic cation embedded within a lacunary framework. Building on this concept, an electrophilic pincer-like POM-Pd(ii) hybrid was developed in 2014. A bifunctional substrate containing both a sulfide and an aldehyde moiety was selected as a model ...
Activation is autocatalytic, intramolecular, requires a low pH, and is not calcium dependent;2 this late, acidic compartment propeptide removal distinguishes proPC2 activation from that of other convertases. After much work ruling out other mechanisms, it now seems that 7B2 functions mai...
and the composition may be solid or liquid; however, when the composition is composed of the ketone-based gas adsorbent and at least one gas adsorbent selected from the group consisting of basic gas adsorbents, sulfur-based gas adsorbents and organic acidic gas adsorbents, the composition is pref...