hydroxyl

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hydroxyl

 [hi-drok´sil]
the univalent radical OH.

hy·drox·yl

(hī-drok'sil),
The radical or moiety, -OH.

hy·drox·yl

(hī-drok'sil)
The radical, -OH.
References in periodicals archive ?
The IR spectrum showed a broad peak at 3500-3200 [cm.sup.-1] which was assigned to the hydrogen-bonded hydroxylic (OH) group.
1996) that the carbonyl oxygen of the A-ring and the C17[beta] hydroxylic oxygen of the D-ring in DHT most likely interact through H-bonds with [Arg.sup.752] in helix 5 and [Thr.sup.877] in helix 11 in AR-LBD, respectively, because mutation of these residues caused a complete androgen-insensitivity syndrome (Sultan et al.
Higher contents of carboxylic, phenolic, hydroxylic, and other functional groups in HA and FA function as nutrients chelator [79-81].
Carboxylic MWCNTs presented better dispersion in PLA than the hydroxylic MWCNTs, which led to the non-terminal low frequency behavior due to the readily formed network structure (21) Song examined the Theological behaviors of polyethylene oxide/CNT (PEO/CNT) composites with different surface treatments of CNTs and found that the acid-treated CNT composites exhibited higher complex viscosity (22).
Chemical modification with tartaric acid resulted in enhanced removing efficiency of same quantity of biosorbent by enhancing the number of binding sites available for biosorption that was mainly due to protonation of carboxylic, hydroxylic and amino functional groups of seeds (as clear from FT-IR data in Table-1) [24].
Presumably, the significantly increase in the magnitude of--O--C=O and O--H stretching bands observed for modified CNT specimens are likely due to the carboxylic and hydroxylic reactions of the sulfuric/nitric acid mixed solutions with C=C bondings of the graphite structures of CNTs during their modification processes.
When MGE was added together with the entire ABS in the 5th barrel of the extruder, these acid residues may had catalyzed crosslinkings reactions in the MGE, competing with the blend's effective compatibilization reaction which occurs between the chain ends of PBT (carboxylic and hydroxylic groups) and the epoxy groups of MGE [7-9].
Commercial PET resins are well known to have a combination of carboxylic and hydroxylic end groups.
We would like to note here that some authors have remarked the possibility that anhydride-system curing reactions be catalyzed by the presence of water, carboxylic and hydroxylic species present in the epoxy resin or even in the reinforcing fiber [38].
The esterification of acids with alcohols is a reversible reaction with a well-known mechanism (1, 2) Two reaction mechanisms through a tetrahedral intermediate and acyl-oxygen cleavage BAc-2 and AAc-2 are most common and require a nucleophilic attack of a hydroxylic nucleophile on the carbonyl double bond of the carboxylic or protonated carboxylic group.
These processes are autocatalytic since the hydroxylic molecules partly protonate the oxygen atom of the epoxy group leading to an easier opening of the glyceryl ring.