They are mallic, citric, tartaric, andpectic acids.
Other enzymes, known as "pectinases," which coagulate the soluble pectins or pectic acids into insoluble jellies in the tissues of the plants seem to aid the plant in resisting the penetration by the parasite.
When the middle lamella reaches the pectic acid stage, the fruit becomes soft and "mushy" in texture.
The intermediate products of the hydrolysis are the pectins, which swell up in water and readily form jellies; while the final meta-pectic acid is easily soluble in water and resembles the true gums in its properties.
A little pectic acid is thus precipitated, which is removed by filtration.
The pectic acid thus liberated, remains under the form of a colourless jelly, which reddens litmus paper, and tastes sour, even after it is entirely deprived of the muriatic acid.
Scheele, and may be obtained by digesting one part of gum arabic, sugar of milk, or pectic acid, with twice or thrice their weight of nitric acid.
A very small addition of potash, or its carbonate, converts pectine into pectic acid; both of which substances are transformed into mucic and oxalic acids by the nitric.
Other roots such as the carrot and turnip contain pectic acid,[J] a nutritious substance resembling starch.
The effect of boiling with alkali is to remove the pectic acid, the fatty acids, part of the cotton wax and the bulk of the colouring matter, while the albuminoids are destroyed and the motes swelled up.
Pectic acid can be extracted by the chemist from Carrots, which will solidify plain sugared water into a wholesome appetising jelly.
One part of thispectic acid dissolved in a little hot water, and added to make three hundred parts of warm water, [90] is soon converted into a mass of trembling jelly.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "pectic" in a variety of sentences. We hope that you will now be able to make sentences using this word.
