In the old books on pharmacy a certain mixture of the then known gum-resins was called Suffitus, which being thrown upon hot ashes produced a vapor which was considered to be salutary in many diseases.
Usually a viscous sol is thickened by the addition of inert fibres and powders, and with the object of making the preparation more waterproof it is customary to incorporate oils, fats, waxes, tars, and resins before the gel is set.
The wood is stripped of bark and usually piled for some months to dry and to allow the resins to become insoluble.
Lastly, it dissolvesresins and essential oils; but it neither acts upon gums, properly so called, nor on fixed oils.
When heated, it melts like other resins, and in this, and many other properties, it partakes of the character of resins in general.
Among the vulgar the term is often incorrectly applied to the resins and gum resins.
A yellow or reddish-yellow substance, forming one of the three resins found by Schloesberger and D[oe]pping in rhubarb.
The resins are produced from the oils by oxidation.
But in chemistry the term is confined to such vegetable juices as consist of resins mixed with volatile oils, and yield the volatile oil on distillation.
Musk, castor, and the resins dissolve completely, there remaining behind only the impurities and any mineral constituents present which possess no aroma.
The soft resins or balsams are kneadable, and sometimes even semi-fluid; they represent solutions of resins in volatile oils, or a mixture of volatile oil and resin.
Benzoin generally consists of cinnamic and benzoic acids which occur in a crystalline state in the grains as well as the ground-mass; further, of several amorphous resins soluble in alcohol, and coloring matter.
The resins are widely diffused in the vegetable kingdom, there being scarcely a plant which does not contain resin in one form or another.
To prevent the resins from scorching, the bottom of the pan must constantly be kept free with a small iron spatula.
A few bodies of the character of resins also occur in the animal kingdom, and a series of them, the fossil resins, are generally classed in the mineral kingdom, though most of them are very likely derived from plants.
The resinsand licorice mentioned in the receipt given below are gradually and very carefully melted in an iron pan over a gas or petroleum flame.
In Tolu balsam have been found toluene, cinnamic and benzoic acids, and several resins not yet sufficiently examined.
According to Parker, ten different resins are admixed with myrrh, especially bdellium resins.
To fix the odor, resins or gums were added to the ointments.
Washes are mostly milky fluids or emulsions, formed by the fine division of resins or balsams in water, benzoin and myrrh being especially employed for the purpose.
We know that mastic and various resins are soluble in alcohol, and are precipitated when the solution is poured into water: Eau de Cologne, for example, produces a white precipitate when poured into water.
I don't think your gums and resins would do the deed so well.
They could make it out of all those delicious gums and resins you read about in books on the Spice Islands, instead of--by the by, what is glue made of?
Resins and waxes may serve only as protection to the surfaces of plants; coloring matters, as screens to shut off or admit certain of the sun's rays; but we are still far from penetrating the mystery of life.
The solvent action of saponin on resins has been already discussed.
The essential oils and the resins often occur associated together in the plant; or, the resins may develop from the oily juice of the plant after exposure to the air.
Among the hard resins are many substances which are extensively used in the manufacture of varnishes, such as copal, amber, dammar, sandarach, etc.
Many of the oils and resins which are secreted as the result of injury by disease or wounds have marked antiseptic properties and undoubtedly serve to prevent the entrance into the injured tissue of destructive organisms.
It is not probable that the sweet-smelling gums and resins of the countries of the Indian Ocean began to be introduced into Greece before the 8th or 7th century B.
Mummies which have been only salted and dried, are generally more badly preserved than those in which are found resins and bitumen.
The odoriferous resins and bitumen not only preserved from destruction, but also kept at a distance, the worms and beetles which devour dead bodies.
There is only one way of counteracting this--by mixing other gums or resins that have less or but little glare when hard.
It will be therefore plain that an alcoholic solution of gums or resins will have to be relied on for obtaining the best results when time is limited.
If less than 50 per cent alcohol is used in making the extract, some alkali must be added to dissolve the resins which will not dissolve in a weaker alcohol.
On the heart of the frog the resins have little or no effect, comparisons being made with digitalis in the same animals.
Gordon Sharp[12] was unable to obtain either alkaloid or glucosid from the plant, but found a series of resinsthat caused contraction of the blood-vessels of a frog.
Defn: Of or pertaining to resin; derived from resin; specifically, designating an acid found in certain fossil resins and hydrocarbons.
A name given in California to various composite plants which secrete resins or have a resinous smell.
Note: Resins exude from trees in combination with essential oils, gums, etc.
Defn: Any one of a number of similar complex resins obtained from the bark of several trees and shrubs of the Styrax family.
The resins are partly soluble in alkalis, with formation of a kind of alkali salts which we may call resin-soaps.
Resins are the residues obtained by distilling the volatile oil from oleoresins or the precipitates obtained from solutions of resins in alcohol by the addition of water.
For the official resins see under the names of the principal constituents.
Emulsions are aqueous preparations in which oils or resins are suspended by means of mucilaginous substances.
We have seen it dissolve copal and mastic to form varnishes; and these resins are certainly not soluble in water, since water precipitates them from their solution in alcohol.
There is a class of compound resins called gum-resins, which are precisely what their name denotes, that is to say, resins combined with mucilage.
Is it of these resins that the mastic and copal varnishes, so much used in painting, are made?
For when resins are artificially made by the combination of volatile oils with oxygen, the vessel in which the process is performed is bedewed with water, and the air included within is loaded with carbonic acid.
Dissolved either in oil, or in alcohol, resins form varnishes.
Waxes and resins have been used successfully to prevent undue loss from the plant tissues while in storage.
Today golf club heads are being made of "Compreg," a wood which has been impregnated with phenolic resins and cured with heat.
Other resins and gums are yielded by the trees, one of which somewhat resembles the "kauri" gum of New Zealand, and occurs in a similar situation beneath the soil; but I was unable to find the tree.
Table of Solubility of Resins in different Menstrua.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "resins" in a variety of sentences. We hope that you will now be able to make sentences using this word.
