एक थर्मोसेटिंग राल

phenolic शब्द के हिंदी अर्थ का उदाहरण:

फिनोलिक कार्बोनिल यौगिक का अपचयन।

एंथोसियानिन (Anthocyanins) जो अंगूर को अपना बैंगनी रंग देता है, सोया से आइसोफ्लेवोन (isoflavones), फाइटोएस्ट्रोजन (phytoestrogens) और टैनिन (tannins) जो चाय को कसैलापन देता है, फिनोलिक होते हैं।

फिनोलिक में फिनोल वलय होते हैं।

জজজ

phenolic's Usage Examples:

London: Orbis Publishing Towers GHN, Tse A, Maass WSG (1966) Phenolic acids and phenolic glycosides of Gaultheria species.

However, there may potentially be changes caused within the phenolic compounds by the processing, which may affect bioavailability.

It dissolves readily in caustic alkalis on account of its phenolic character, and it forms a yellow-coloured di-acetate.

Jochem (Ber., 1901, 34, p. 3337), who arrived at the conclusion that the normal decomposition of diazonium salts by alcohols results in the formation of phenolic ethers, but that an increase in the molecular weight of the alcohol, or the accumulation of negative groups in the aromatic nucleus, diminishes the yield of the ether and increases the amount of the hydrocarbon formed.

Journ., 1888, 9, pp. 389 et seq.) have shown that the main product of this reaction is usually a phenolic ether.

Hewitt has also attacked the problem by brominating the oxyazobenzenes, and has shown that when the hydrobromic acid produced in the reaction is allowed to remain in the system, a brombenzene-azo-phenol is formed, whilst if it be removed (by the addition of sodium acetate) bromination takes place in the phenolic nucleus; consequently the presence of the mineral acid gives the azo compound a pseudo-quinonoid character, which it does not possess if the mineral acid be removed from the sphere of the reaction.

Hantzsch (Ber., 18 99, 3 2, pp. 59 o, 3089) considers that the oxyazo compounds are to be classed as pseudoacids, possessing in the free condition the configuration of quinone hydrazones, their salts, however, being of the normal phenolic type.

They may be prepared by the reduction of nitro compounds in alkaline solution (using zinc dust and alkali, or a solution of an alkaline stannite as a reducing agent); by oxidation of hydrazo compounds; or by the coupling of a diazotized amine and any compound of a phenolic or aminic type, provided that there is a free para position in the amine or phenol.

With zinc dust in presence of caustic soda it yields the secondary alcohol oxanthranol, C 6 H 4: CO Choh: C 6 H 4, with tin and hydrochloric acid, the phenolic compound anthranol, C5H4: CO.

When heated with concentrated hydrochloric acid the amino group is replaced by the hydroxyl group and the phenolic eurhodols are produced.

phenolic's Meaning':

a thermosetting resin