One, by judgment in lighting and superior manipulation, will transfer to his plates more texture and suggestiveness of the different substances represented than the other.
Niepce's experiments with resins, asphaltum, and other substances terminated in nothing but tedious manipulations, lengthy exposures, and unsatisfactory results.
In assisting the white corpuscles to perform this important function, the co-operation of certain substances dissolved in the fluid portion of the blood is also necessary.
The most recently discovered of these auxiliary substances are called opsonins.
Some people object to the whole conception of serum treatment, on the ground that serum and allied substances are 'messy' things.
There are substances in the fluid part of the blood which are called antitoxins, because they neutralise the toxins produced by the bacteria.
It is well known that if the yeast plant (which is very similar in many details to bacteria) is grown in a solution of sugar, the sugar is broken up and disappears, and two new substances formed from the sugar take its place.
Because their substances are composed of oxygen, hydrogen, carbon, and nitrogen--the four chemical elements of which the human system is formed.
Water, in fact, undergoes no change in the body, excepting that of admixture with the substances of the body.
Assuming all the lights to be of the same intensity, the degree in which the substances burnt would vitiate the atmosphere may be gathered from the number of minutes each would take to exhaust a given quantity of air.
Because its chief effects are to expand, fuse, evaporate, or decompose the substances upon which it acts.
Because black and dark substances are not good reflectors of heat.
It is more easily conducted by some substances than by others.
Why do suppers, when indigestible substances are eaten, produce dreaming?
Alkalies are a numerous class of substances that have a great affinity for, and readily combine with, acids, forming salts.
The healing efforts of the organism striving to throw off the morbid substances within the body, purging them away in a flux, or burning them up with a fever, show the operations of the same principle.
We would see the blood pouring forth washing away the dirt and foreign substances that have entered the wound.
We can only take it unconsciously, when combined with other substances in the form of proteid food.
We may be able to treat germ cells with acids or other substances which destroy the cell membrane so as to allow crossing between very widely separated species and genera.
The latter solution was made up so that the quantity of phosphoric acid and potash approximated more or less to the amount of those substances found by analysis in an extract made from a good soil.
Coupin (1903) re-investigated some of Raulin’s work under more antiseptic conditions in order to see what substances were really needed by the mould and whether certain elements declared essential were really so.
It is probable that what has been found true with the few substances tested would prove to be similarly true over a much wider range of poisons, and at any rate the hypothesis must be dismissed in its universal application.
This applies not only to thosesubstances which are present in the greatest abundance, such as C, P, N, &c.
Masking effect caused by addition of soluble substances to solutions of copper salts.
While all the inorganic substances examined in this monograph are toxic in high concentrations, some lead to increased growth in lower concentrations, while others apparently have no effect.
The substances fall into two groups: (1) Those that apparently become indifferent in high dilutions and never produce any increase in plant growth.
Further, no one knows the complicated action that may or may not occur in the soil on the addition of extraneous substancessuch as manures or poisons.
The action of insoluble substances in modifying the effect of deleterious agents upon the fungi.
Effect of adding insoluble substances to solutions of copper salts.
So small was the knowledge, so aimless the long experimenting, that the discovery that not amber only, but other substances as well, possessed the electric quality when rubbed, was a notable advance in knowledge.
It has the power of decomposing chemicals (Electrolysis), and it should be remembered that even water is a chemical, and that substances composed of one pure organic material are very rare.
The next step was to find that all substances were not alike in a power to conduct a current; i.
We find that it is the constant endeavor of electricity to equalize its quantities and its two qualities, in all substances that are near it that are capable of containing it.
There are no absolutely perfect conductors, and there are no substances that may be called absolutely non-conductors.
There are odorous substances attached to many of the lower animals which seem to have no significance, but just happen to be the result of necessary chemical changes, not aimed (so to speak) at their production.
It seems to be an exception to the rule that "odours" (as distinct from pungent vapours or gases) are only produced by substances formed by plants or animals.
There are a variety of odorous substances produced by different parts of the human body, of which some are agreeable and others disagreeable.
Musk and civet are of this nature, and it is a significant fact that these substances are used as perfumes by human beings.
The diversity in apparent volume, consequent on the employment of different substances in gauging the internal capacity of the skull, necessarily detracts from the value of comparative results of Morton, Davis, and others.
The story of the old fire-makers is recorded still in the charcoal ashes of many an ancient hearth; for charcoal is one of the most indestructible of substances when buried.
To make muscle, the body takes othersubstances in appropriate quantities from the blood.
There are many other compound substances in the body.
Every man's body contains sufficient of this lightest of all substances to inflate a balloon that would lift himself, balloon, and tackle.
All this variety, however, the body brings about itself, marvellously selecting from the one raw material, blood, the different substances and the appropriate quantities for each kind of tissue.
The last of thesubstances of any bulk in the body is carbon.
The object of the first, is to bring the alimentary substances to such a state as is necessary, that they may be capable of the new combinations into which they are to enter, to obtain the animal character.
The intoxicating powers of spirits are diminished by the addition of vegetable acids, or substances which contain oxygen, which will counteract the effects of the hydrogen.
Hence it is that those substances which are less saline, and less acrid than the saliva, have no taste.
There are many substances likewise which pass unaltered through the intestines of animals, and consequently are not acted upon by the gastric juice.
The sense of taste is often diminished by a thickened mucous covering of the tongue, which prevents the application of substances to its nervous papillae.
This flow of saliva is likewise frequently excited by the smell or sight of substances agreeable to the taste, which causes an appetite, or desire of eating, similar to that caused by an accumulation of gastric juice in the stomach.
To see this, we must examine the chemical nature of the substances which produce the greatest action, and the greatest exhaustion of the vital principle: namely, those which produce intoxication.
Good fresh butter, used in moderation, is easily digested; it is softening, nutritious and fattening, and is far more easily digested than any other of the oleaginous substances sometimes used in its place.
When the substancesmentioned above are melted together properly, a man dips a long, hollow iron tube into a pot filled with the boiling liquid glass, and takes up a little on the end of it.
All substances clothe themselves in forms: but there are suitable true forms, and then there are untrue unsuitable.
They are reduced somewhat with the file, and polished with substances usually employed for such purposes.
This agitation causes the several substances composing the charge, to unite according to their respective affinities.
The coloring substances are mixed with water, rendered tenacious by size or solutions of glue, or by skimmed milk, increased in tenacity by a small quantity of thyme.
For painting in water-colors, the substances employed in communicating the tints are combined with gum, and formed into cakes or lozenges.
For other colors, the composition for the different coats is the same, except for the two last, in which other coloring substancesare added to the materials just mentioned, to give the proposed hue.
Before coloring substances can be applied in painting, they must be reduced to extreme fineness, and be mixed with some tenacious fluid, to cause them to adhere to the surface on which they are to be spread.
But they are more frequently found united with some substances which, in a great measure, disguise their metallic qualities, or, in other words, in a state of ore.
Lime, borax, and common salt, are also frequently used as a flux in aid of some of the other substances just mentioned.
To prepare it for application, it only requires to be washed and sifted, in order to free it from the argillaceous and other substances unfit for use.
All three of the substances last mentioned yield sharper impressions than plaster of Paris.
A large number of other radio-active substances have been separated and some of their properties determined, but these were found by different means and will be noted in their proper place.
This gives the range of the alpha particles in such substances and is connected in a simple way with the atomic weight, that is, it is again fixed by the mass of the opposing atom.
Errors crept in at first from the failure to completely separate the substances produced in the series, and sometimes because of the simultaneous production of two substances.
Polonium, however, was found to lose most of its activity in a year, and later it appeared that some radio-active substances lost most of their activity in the course of a few minutes or hours.
Other elements and ordinary substances show a minute activity.
The evolution of heat from radium and the radio-active substances is, in a sense, a secondary effect, as it measures the radiant energy transformed into heat energy by the active matter itself and whatever surrounds it.
Stopping Power of Substances Parallel with the experiments mentioned, there is what is called the stopping power of substances.
At first uranium and its compounds were the only known source of these new radiations, but many other substances were examined and two years later thorium and its compounds were added to the list.
These X rays are emitted by various substances under bombardment by the cathode rays (negative electrons) and have great intensity and very minute wave lengths.
Its food principally consists of insects, but crustaceans, worms, and scraps of vegetable substancesare eaten.
That this species occasionally eats vegetable substances I have assured myself by repeated dissection.
The chemical combination of two substances produces, as is well known, a third substance, with properties different from those of either of the two substances separately, or of both of them taken together.
It is also asserted that some substances bear the signatures of the humors, as the petals of the red rose that of the blood, and the roots of rhubarb and the flowers of saffron that of the bile.
We seem, therefore, to have detected the characteristic difference between the substances on which dew is produced and those on which it is not produced.
Among substances not of organic origin, the most notable instances are hydrated silicic acid, and hydrated alumina, with other metallic peroxides of the aluminous class.
In all of them the metallic compounds are brought into contact with the substances which compose the human or animal body; and the instances do not seem to agree in any other circumstance.
The close analogy between these substances and the toxins, an analogy upon which, moreover, I have dwelt at some length, permits me to refer the reader who is desirous of fuller details to the small work just mentioned.
The culture bouillons of Koch's bacillus contain one or more activesubstances which constitute, and which is at the present designated as, tuberculin.
Experiments so far made have shown that the antitoxins are substances of an albuminoid nature, of unknown composition, and which are very closely united to the albuminoid substances of the serum.
There must hence be a diffusion of toxic substances which, distributed by the blood, affect the different systems and exert a toxic action on the entire organism.
A number of analyses of these substances have been published which, in general, permit no definite conclusion to be drawn.
Mushrooms are alimentary substances of the highest order, causing a general stimulation of the entire organism.
Each one of these substances acts more or less rapidly, and may be associated with different principles which give rise to the variability of the action of these toxic agents.
This inspires naturalists with no pity; they observe that neither the eggs nor the young birds are thrown away, since various reptiles that feed on such substances make a comfortable meal of what is thus placed within their reach.
The intimate nature of material and spiritual substancesis incomprehensible.
Light passes through all substances that are coated with this paint as if they did not exist.
Its property is to render suchsubstances invisible by absorbing all the visible light rays that fall upon it, from red to violet.
Adler has recently reported experiments on dogs, to which he fed or injected intravenously various substances supposed to induce arteriosclerotic changes.
Red meat contains more of the substances producing purin bodies than any other one common foodstuff, and for this reason the excessive meat eater is, ceteris paribus, more apt to develop arteriosclerosis comparatively early in life.
The fats and carbohydrates contain practically no substances that react on the body of the ordinary individual in a deleterious manner during their digestion.
Some see in alcohol one of the most frequent causes of arteriosclerosis; others do not believe that the part played by alcohol is a serious one, only in conjunction with other poisonous substances is it dangerous.
Certain it is that all these substances have a tendency to raise the arterial pressure, but whether the drug itself causes first a degeneration, and later a hypertension results, or vice versa, is not yet positively known.
In the metabolism of food in the intestines there are substances produced which are poisonous when absorbed directly into the circulation.
The poisonous substances produced in the kidneys must exert their action through absorption into the general blood stream.
Ordinarily these substances are rendered harmless either before absorption or are detoxicated in the liver to harmless substances.
It has been shown how poisonous substances absorbed from the intestines have some influence on the blood pressure.
Active immunity has thus been shown to be associated with the presence of certain anti-substances in the serum.
Much of such evidence possesses considerable weight, and seeing that these cells possess active digestive powers it is by no means improbable that substances with corresponding properties may be set free by them.
In fact, organic molecules can be divided into two classes according as they give rise to anti-substances or fail to do so.
Evidence has been brought forward within recent years that the leucocytes may constitute an important source of the antagonistic substances which appear in the serum.
This is the mode of action of the anti-substances in the case of a haemolytic or bacteriolytic serum.
We cannot, however, say that these play an important part in immunity, and even if it were so, the essential factor would be the development of the substances which act in this way.
After these substances have disappeared, however, as they always do in the course of time, the animal still possesses immunity for a varying period.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "substances" in a variety of sentences. We hope that you will now be able to make sentences using this word. Other words: materiel; staple; stock; store; stuff; substance; supply
