Pigment Sentence Examples
In some cases the plastid disappears and the crystalline pigment only is left.
Little is known regarding this class of pigment.
It is chiefly used as a pigment and in the manufacture of flint glass.
For most women, you will want to use your natural pigment line as a guide when applying on your lips.
Applied with a fine mist, it provides both a golden pigment for an instant glow and the self-tanner chemicals for the longer lasting tan.Advertisement
It is characterized by a lack of melanin, the pigment that normally gives color to the skin, hair, and eyes.
Due to the severity of removal procedures, many women instead opt for "camouflaging", which adds new pigment over the existing tattoo in order to balance out the skin tone.
Several tools exist for the application of pigment.
In the case of these red-purple bacteria the colouring matter is contained in the protoplasm of the cell, but in most chromogenic bacteria it occurs as excreted pigment on and between the cells, or is formed by their action in the medium.
Micaceous iron ore consists of delicate steel-grey scales of specular haematite, unctuous to the touch, used as a lubricant and also as a pigment.Advertisement
In the East the custom which has prevailed for centuries, and which is a practice at the present day, of using the seal as a stamp wherewith to print its device in ink or pigment in authentication of a document is parallel to our western habit of inscribing a signature for the same purpose.
It is typically tripartite, consisting of three cup-shaped masses of pigment, the cavity of each cup being filled with columnar retinal cells.
At their inner ends (towards the pigment) these cells contain rod-like structures, while their outer ends are connected with the nerve-fibres.
Some of these cells produced muscles and connective tissue; others absorbed and removed waste products, iron salts, calcium carbonate and the like, and so were ready to be utilized for the deposition of pigment or of skeletal substance.
Ferric oxide is employed as a pigment, as jeweller's rouge, and for polishing metals.Advertisement
Formerly, under the name of "king's yellow," a preparation of orpiment was in considerable use as a pigment, but now it has been largely superseded by chrome-yellow.
Copper arsenite (or Scheele's green) used to be much employed as a pigment for wall-papers and fabrics, and toxic effects have resulted from their use.
In addition to diffuse pigment (mostly in the epidermis), the skin contains granular pigment stored up r' in cells, the chromatophores, restricted to the cutis, which are highly mobile and send out r2 branches which, by contraction and expansion, may rapidly alter the coloration, most batrachians being in this respect quite comparable to the famous chameleons.
Besides white (guanine) cells, the pigment includes black, brown, yellow and red.
Process 1. Dissolve gum arabic in water and mix it with a pigment and a solution of potassium bichromate or ammonium bichromate.Advertisement
The white is a blue colored budgerigar with a reduction in the color pigment and works in a similar way to the yellows.
They are an excellent source of vitamin A our bodies convert the orange pigment carotene into it.
Pigment Power in carrot Color Have you ever seen a purple carrot?
After a further period the paint will become chalky as the pigment begins to be released.
In section " checker " the checker pigment pattern is explained.Advertisement
A chloroplast is an organelle in green plants containing the light harvesting pigment chlorophyll.
Within these tissues, there are small particles called chloroplasts which contain pigments, including the green pigment chlorophyll.
What is the role of zinc chromate as a pigment in a priming paint for steels?
The XRF signal was saturated by the pigment lead chromate.
How would I use a colorimeter to detect the yellow pigment forming?
In sea, lake, and river this pigment gave a bloody coloring to the water.
A multi basin study will be carried out using diatom, pigment and pollen analysis.
Any pigment is added before the size (including a little indigo and ivory black to prevent yellowing with time in white distemper ).
Unfortunately there was very little pigment present in the sample; what there was had become almost inextricably enmeshed in the wood fibers.
Extensive or ' geographic ' atrophy of the retinal pigment epithelium, however, can result in marked visual acuity loss.
Pigment dispersion glaucoma affects 1-2% of glaucoma sufferers.
Human RPE pigment granules were isolated from RPE cells pooled into groups according to the age of the donors.
The mineral sands deposits contain ilmenite, a major source of titanium dioxide (TiO2) which is used to produce white pigment.
The chapter includes all formats from small printers to wide format printers; dye and pigment inks.
Fade resistance For print longevity pigment inks are advised.
If you are considering food supplements to help maintain eye health in particular, a plant pigment called lutein is especially useful.
Taking lutein supplements can significantly increase blood levels of lutein supplements can significantly increase blood levels of lutein & the amount of macular pigment present in the retina.
Black skin contains more melanin, which is a brown pigment.
Skin Color The color of skin depends primarily on a pigment called melanin.
High levels of the skin pigment melanin reduce the risk of common skin cancer for people with darker skin.
Damage in the muscle causes the release of pigment called myoglobin into the bloodstream where it is transported to the kidneys.
The red pigment in tomatoes, lycopene, works by quenching the highly damaging free radical singlet oxygen.
There is the same amount of red pigment on the surface of the balloon it is just spread more thinly and appears pale.
Truth rather than fancy was that much of his much, much older skeleton was stained by blood tinted ochre pigment.
Early ARM is when only drusen and retinal pigment epithelial changes are present.
People with naturally brown and black skin have more melanin pigment in their skin cells.
There is either an excess release or incomplete removal of the bile pigment derived from hemoglobin in red blood cells.
The role of the retinal pigment epithelium in regulating development of the neural retina.
Within these cells is a pigment called rhodopsin which is a complex of opsin, a protein, and retinol.
Cavefish have evolved regressive characters such as a degenerate eye, small optic tectum, and less pigment.
About 10 percent of patients with type II have vitiligo, or loss of pigment, on areas of the skin.
The other possible cause is a condition called vitiligo, in which the pigment is lost in large irregular patches.
The colony of Otago (from a native word meaning ochre, which was found here and highly prized by the Maoris as a pigment for the body when preparing for battle) was founded as the chief town of the Otago settlement by settlers sent out under the auspices of the lay association of the Free Church of Scotland in 1848.
As has been described above, the endoderm may also contribute to the sense-organs, but such contributions are always of an accessory nature, for instance, concrement-cells in the otocysts, pigment in the ocelli, and never of sensory nature, sense-cells being Hydromedusae are of separate sexes, the only known exception being Amphogona apsteini, one of the Trachomedusae (Browne ).
It has been suggested that the red pigment Anthocyan, which is found very commonly in young developing shoots, petioles and midribs, effects a conversion of light rays into heating ones, so facilitating the metabolic processes of the plant.
B, Trochosphere of an Opisthobranch (Pleurobranchidium) showing - shgr, the shell-gland or primitive shell-sac; v, the cilia of the velum; ph, the commencing stomodaeum or oral invagination; ot, the left otocyst; pg, red-coloured pigment spot.
This pigment is manufactured by several methods.
The one-sided specialization and the peculiar metallic colouring of the lateral tail feathers mark them as the extreme terms of a degenerative series, whilst the symmetry, likeness of constituent parts inter se, and absence of specialized pigment, as well as the fact that they differ little from any average feather of birds in general, mark the contour feather as primitively simple, and as the starting-point from which the highly elaborated eye-painted tail feather has gradually evolved.
Haemosiderin, an iron-containing pigment (probably an hydrated ferrous oxide), is found in more or less loose combination with protein substances in an amorphous form as brownish or black granules.
The malignant cells develop and accumulate muscle fibres show the pigment in their protoplasm granules of melanin granules, which are of a light yellow pigment.
Melanin is a pigment that occurs naturally in the body and protects the body from harmful exposure to sunlight.
The rich purple pigment, which gives the berries their characteristic color, is loaded with anthocyannins, a particular group of polyphenols which include grapes.
Freckles are concentrated clusters of melanin, the pigment that colors human skin.
The ascorbic acid in lemon juice is also thought to stop the production of melanin - the pigment that produces freckles in response to the sun.
Maple is one of the least dramatic hardwoods, making it the perfect wood to take any pigment and finish any style.
It's best to apply your pigment shadow before your foundation because it tends to drop down onto the cheeks as you pat it into place.
A small amount of colored pigment is injected under the surface of the skin using a pen-like needle or a traditional tattoo gun.
However, this specific pigment has since been recalled and is rarely an issue.
In this method, the pigment is gently "tapped" into the skin using a manual comfort tool.
Though pigment allergies are extremely rare, it is important to exercise caution.
The front needle is lifted through the back needle, depositing pigment to the area of the skin where the needles originally met.
This sound is a good sign - it means that the needle is going deep enough into the dermis to actually deliver the permanent pigment.
Permanent makeup is indeed a permanent change to the pigment.
It is also important to note that, depending on the type of device used to transfer pigment to the skin, an audible sound will be heard throughout the procedure.
In this process, the pigment is implanted along the lash line.
Fuller, sexy lips are easily achieved when the pigment is applied just outside the natural lip line.
The makeup artist gently "taps" pigment into the skin with this tool, a practice that allows for the most precise, particular application of color and appropriate depth perception.
The messy factor's not really a factor if you divide up the pigment into smaller 5-gram jars.
The pigment is mostly white, but the other colors make it multi-dimensional enough to pull off without looking like Frosty the Snowman when you wear it on your cheeks.
Nails If you add a pigment to clear nail polish, it'll mix beautifully.
You can choose from matte eye shadows, shimmer eye shadows or sometimes an eye shadow will have little pieces of glitter infused into the pigment (color).
Another tip or trick to try when picking a lip color that's not too dark on you is to look for what is called a "lip stain" which is lip color that gives you a darker pigment but has a lighter, sheer and longer lasing finish.
With its intense (yet incredibly natural) pigment, versatile color selection and multitude of uses, it practically saves the day when I don't have time to complete a full face of makeup.
Thanks to its micronized pigment content, though, the color won't settle into fine lines or show up on the skin.
Much more neutral than the bronze, it offers very little pigment but still stands out from a highlighting standpoint.
So frosty it reminds me of the '80s, this offers very little pigment and far too much shimmer to be practical.
Egyptians worked with pure minerals for pigment and color.
The pigment is surprisingly rich and long lasting, which is quite a feat for a creamy product that one would expect to slide right off as the day wears on.
Designed to enhance the natural undertones of the skin, this foundation can be applied lightly for a sheer look, or can be layered to impart more pigment (coverage).
The blush works just as well when applied over foundation, but you may want to use a slightly lighter hand; it seems as though the foundation tends to more readily "grab" onto the pigment in the cream formula.
Last, fill in the thin line with a large strip of powdered color and begin blending to desired depth and pigment.
Cornsilk face powder, in its original form, contained no pigment or color.
These hypoallergenic cosmetics get their pigment from mica, a mineral stone.
He denies the charges and claims he is losing pigment in his skin due to a skin condition.
The former member of The Jackson 5 also said he suffers vitiligo, a condition where the skin loses its pigment.
This layer of skin also contains pigment that determines a dog's color and protects him from the sun.
Successful tattoo removal depends on the tattoo's age, size, color, and type, as well as the patient's skin color and the depth of the pigment.
Blue granites are rare, with the minerals that cause the blue pigment to show up sporadically and inconsistently.
They are made from 90% natural stone material that has been mixed with a resin and pigment.
Since you're right there, you can control the pigment, surface texture and final look of the counter.
As hair becomes gray, the follicles stop producing pigment or produce less of it, which results in loss of color.
Because of this, it is important to treat gray hair differently than you would treat hair that is still producing natural pigment.
That's because on dark eyes, the color melds well with the pigment to create a more realistic look; with light eyes, the pixilation will be apparent against the light background.
The major pigment in bile is a chemical called bilirubin, which is yellow.
Hemoglobin-An iron-containing pigment of red blood cells composed of four amino acid chains (alpha, beta, gamma, delta) that delivers oxygen from the lungs to the cells of the body and carries carbon dioxide from the cells to the lungs.
Melanoma originates in the skin, usually in pigment cells (melanocytes).
Bilirubin is a yellowish-red pigment that is formed and released into the bloodstream when red blood cells are broken down.
Kernicterus-A potentially lethal disease of newborns caused by excessive accumulation of the bile pigment bilirubin in tissues of the central nervous system.
This pigment gives a newborn's stools their yellow color.
Bilirubin-A reddish yellow pigment formed from the breakdown of red blood cells, and metabolized by the liver.
Malignant melanoma-The most serious of the three types of skin cancer, malignant melanoma arises from the melanocytes, the skin cells that produce the pigment melanin.
Melanin-A pigment that creates hair, skin, and eye color.
Many types of albinism exist, all of which involve lack of pigment in varying degrees.
Sun exposure normally produces a tan, which is an increase in melanin pigment in the skin.
Many people with albinism do not have melanin pigment in their skin, do not tan with exposure to the sun, and as a result develop sunburn.
Parts of the retina do not develop correctly if melanin pigment is not present during development.
In this case, the one normal gene provides enough information to make some pigment, and the child has normal skin and eye color.
It measures the rate at which hair converts the amino acid tyrosine into another chemical (3,4-dihydroxyphenylalanine, or DOPA), which is then made into pigment.
Hermansky-Pudlak syndrome-A rare type of albinism, most common in the Puerto Rican community, which can cause pigment changes, lung disease, intestinal disorders, and blood disorders.
Tyrosinase-An enzyme in a pigment cell which helps change tyrosine to dopa during the process of making melanin.
Albinism-An inherited condition that causes a lack of pigment.
Hemoglobin is the red pigment that gives red blood cells their characteristic color and their essential ability to transport oxygen.
It is also the pigment that gives red blood cells their color.
Tattooing is accomplished by injecting pigment into the deeper layers of the skin, usually by way of needles or air pressure.
An electric needle injects colored pigment into small, deep holes made in the skin to form the tattoo.
Allergic responses to tattoos may occur due to the pigment compounds used, such as oxides of iron, mercury, chromium, cadmium, and cobalt and synthetic organic dyes.
When examined under a microscope, the RBCs also appear pale or light colored from the absence of heme, the major component of hemoglobin, which is the iron-bearing protein and coloring pigment in RBCs.
The destroyed red blood cells release the blood's red pigment (hemoglobin) which degrades into a yellow substance called bilirubin.
A bilirubin test is a diagnostic blood test performed to measure levels of bile pigment in an individual's blood serum and to help evaluate liver function.
Bilirubin is a yellow-orange bile pigment produced during the breakdown of hemoglobin, the iron-bearing and oxygen-carrying protein in red blood cells.
In the TSB test, spectrophotometry is used to identify and quantify the amount of bilirubin in a specific amount of serum by measuring the amount of ultraviolet light absorbed by bilirubin pigment in the sample.
Spectrophotometry-A testing method that measures the amount of ultraviolet light absorbed by specific substances such as bilirubin pigment.
These lasers are attracted to the melanin pigment cells in hair, heating these cells and vaporizing the hair.
Malnutrition that affects pigment characteristics and production.
It does not interact with the hair's natural pigment, but instead permeates the hair cuticle and enhances the overall color.
These hair products usually contain both ammonia and peroxide that lighten the natural pigment of one's hair and form a new base color before the permanent shade takes hold.
The darker the hair, the more red pigment is contained in the strands.
The client noticed that where her hairs were darker the laser felt hotter and more painful, which was expected since the laser targets the dark melanin pigment in hair.
As mentioned previously, laser hair removal involves "vaporizing" the hair's pigment and eliminating the underlying follicles.
Dark pigment, as opposed to lighter pigment, readily absorbs the light.
The laser works by targeting the dark pigment in hair.
Because demi permanent color is ammonia free, it can sometimes be used immediately after these services to restore faded color pigment.
Try incorporating the following suggestions into your lifestyle to help maintain your hair's natural pigment.
Melanin is the darkening pigment that is responsible for a person's ability to tan when exposed to the sun.
Krill oil contains astaxanthin, a red pigment found in shrimp, krill, lobster and other marine livestock.
Hair color comes from melanin, and the bulbs that produce this pigment degrade as you age, which causes gray hair.
As UVA and the harsher UVB rays penetrate the skin, the action activates melanin production within the cells, a darker pigment that colors the skin.
Most of the pigment molecules will be too large for the white cells to disperse, and so most of the coloring will remain unless it is professionallyremoved at a later date.
The best carriers distribute the pigment evenly and keep it from clumping together when used, while providing a bit of disinfecting action.
The pigment inks are held separately in small cups called ink caps and are fed to the machine through connecting tubing.
Bursts of laser light were used to break up the pigment inks beneath the skin surface.
These lasers emit very powerful, but shorter bursts of light that break up pigment particles without significant damage to the skin, so scarring is almost non-existent.
Light breaks down pigment, but different colors absorb different wavelengths of light, and this determines how quickly the laser is effective on each color.
This means the laser light is able to work at full capacity to break down the pigment.
If you've chosen henna, then you'll just have to wait until your immune system finishes breaking down the pigment for you.
Since tattoo ink mainly consists of a pigment and a binder, there are several easy homemade tattoo ink recipes that will create a basic black dye.
This basic black dye is popular amongst prison tattooists and results in a black pigment without much impact.
The longevity of the tattoo will depend on pigment tones - the darker they are, the longer the makeup will last with minimal fading.
During the tattooing procedure, the pigment is placed under a thin film on the cornea of the eye; specifically, it is injected between the sclera and the conjunctiva.
The pigment then bleeds through the space creating the so-called eye tattoo.
Strategic placing of inks within cuts can lead to designs of raised, colorless scars surrounding areas of pigment for more unique and three-dimensional designs.
This allows the tattoo to be formed much more quickly and with the ink set at a consistent depth throughout the piece, resulting in an even distribution of pigment.
The latter tends to be more vibrant and it thinner, dries quickly, and costs less than pigment ink.
Dye ink is typically easiest for beginning crafters to work with, since pigment ink will require embossing powder and a heat gun to set properly.
Dye ink is the easiest for beginners to work with, although pigment ink offers the possibility of embossing your designs.
Anthocyanins are the pigment that cause berries and fruits to appear red or purple.
It also contains melanocytes, which are the pigment cells that give skin its color.
Also, now is the time to address pigment damage that has occurred due to sun exposure.
The Opulence Serum infuses vitamin C and botanical skin brighteners to balance pigment."
Everyone also has about the same number of melanocytes, special cells that make a pigment called melanin.
Tanning lotions used to be considered a formula that accelerated the darkening pigment on the skin.
When the skin is exposed to these rays, it goes into safety mode and begins to produce additional pigment in an attempt to protect itself from burning.
Melanin is a dark pigment in the skin that goes to work when the skin is exposed to too much sun.
Harmless melanin works to heal sun damage, but unfortunately the dark coloration of the pigment causes spotting.
They are made up of the skin pigment melanin, appear in places that have been exposed to the sun, and are especially common among fair-skinned people who sunburn easily.
Freckles are made up of melanin pigment which absorbs nearly every color of laser light, so almost any type of laser can be used to eliminate freckles.
Older skin may respond to an overdose of sun by sending melanin, a skin pigment to the damaged area.
The bounty of New England's autumn surrounded them, and the sun reflected off the leaves as if it were playing with the tone, searching for the perfect combination of pigment.
The plasma may be pink (Magelona) or yellow (Aphrodite) in which cases the colour is owing to another pigment.
These dorsal eyes are very perfect in elaboration, possessing lens, retinal nerve-end cells, retinal pigment and optic nerve.
It closes with the introduction of incised, white-filled decoration on pottery, whose motives are presently found reproduced in monochrome pigment.
The sulphur fires, and a fine blue pigment is obtained.
Another oxychloride, PbC1 2.7PbO, known as "Cassel yellow," was prepared by Vauquelin by fusing pure oxide, PbO, with one-tenth of its weight of sal ammoniac. "Turner's yellow" or "patent yellow" is another artificially prepared oxychloride, used as a pigment.
In the condition known as albinism there is a congenital deficiency or entire absence of pigment.
A green pigment known as Rinmann's green is prepared by mixing I oo parts of zinc vitriol with 2.5 parts of cobalt nitrate and heating the mixture to redness, to produce a compound of the two oxides.
The basic carbonate is used as a pigment.
The pillars, architraves, ceilings, panels, and almost every available part of the structure, are covered with arabesques and sculptured figures of dragons, lions, tigers, birds, flowers, and even pictorial compositions with landscapes and figures, deeply carved in solid or open workthe wood sometimes plain, sometimes overlaid with pigment and gilding, as in the panelled ceiling of the chapel of Iyeyasu in Tokyo.
But the character of the old red differs essentially from that of the modern manufacture the former being a soft, subdued color, more like a bloom than an enamel; the latter a glossy and comparatively crude pigment.
At Hirado the ceramists affected a lighter and more delicatetone than that of the Chinese, and, in order to obtain it, subjected the choice pigment of the Middle Kingdom to refining processes of great severity.
It is this, that whereas the latter produce their chromatic effects by mixing the coloring matter with the glaze, Seif 6 paints the biscuit with a pigment over which he runs a translucid colorless glaze.
The proper field for the application of these is the biscuit, in which position the covering glaze serves at once to soften and to preserve the pigment.
Sometimes it is almost pasty, and crumbles to powder when dried, so as to be susceptible of use as a pigment, forming the colour known as Cologne earth, which resembles umber or sepia.
The eyes are refractive globules set in a cup of red pigment traversed by a nerve fibre, and lie on the proximal side of the body, directly on the postero-dorsal surface of the brain, or at a little distance from it, on the neck, often within the circle on the corona, and usually well within the transparent body.
After ignition it becomes almost insoluble in acids, and on fusion with silicates it colours them green; consequently it is used as a pigment for colouring glass and china.
By the fusion of potassium bichromate with boric acid, and extraction of the melt with water, a residue is left which possesses a fine green colour, and is used as a pigment under the name of Guignet's green.
A true or complete albino is altogether devoid of pigment.
In man, and doubtless also in lower forms, the absence of this pigment produces the well-marked albinotic facies.
In a complete albino not only is all pigment absent in the skin, but also that which is normally present in deeper organs, such as the sympathetic nervous system and in the substantia nigra of the brain.
There is some reason to believe that a peculiar condition found in the majority of human albinoes, and known as nystagmus, is correlated with the absence of pigment in the central nervous system.
In addition to complete albinism, there exist, however, various albinotic conditions in which more or less pigment may be present.
There is some reason to believe, as we shall see later, that in spite of the presence of a little pigment and of occasional wholly pigmented young ones, Himalayans must be regarded as true albinoes.
Some domesticated mice are entirely white with the exception that they have black eyeballs; and individuals of this type are known in which there is a reduction of pigment in the eyeballs, and since the colour of the blood is then partially visible these appear of a reddish-black colour.
Allen, that partial albinism is a condition in which pigment is reduced around definite body centres, so that unpigmented areas occur between the pigment patches or at their borders.
Various degrees in the reduction of the pigment patches up to that of complete elimination may be traced.
There is nothing to show whether the pigment persists or is absorbed.
At the end of four weeks after it was first purchased the dorsal or upper surface of its external gills developed a small amount of dark pigment.
Hans Przibram also extracted a tyrosinase ' from the ink-sac of Sepia, and, causing it to act upon a watery solution of tyrosin, obtained a black pigment.
The colour of this substance is that of the pigment in the skin or hairs of the animal used.
Given the presence of all the necessary determinants for the development of pigment in a mammal's coat, some or all of the hairs may bear this pigment according to the pattern determinants, or absence of pattern determinants, which the cells of the hair papillae carry.
And yet the albino itself shows no somatic pattern or pigment.
This at least is the method of disguise suggested by examination of the dried insect; but representatives of the same or an allied species found in Mashonaland were observed in the living state to be green with the antlike parts represented in black pigment.
Aluminium silicates are widely diffused in the mineral kingdom, being present in the commonest rock-forming minerals (felspars, &c.), and in the gem-stones, topaz, beryl, garnet, &c. It also constitutes with sodium silicate the mineral lapis-lazuli and the pigment ultramarine.
The difference between the three lies in the nature or conformation of the surface which is covered with the pigment and afterwards gives a reproduction in reverse on the material impressed.
All the accessories for inking are placed at the end of the machine, the ink itself being supplied from a ductor, which can be so regulated by the keys attached to it as to let out the precise amount of pigment required.
Copper sulphate finds application in calico printing and in the preparation of the pigment Scheele's green.
It is used as a pigment under the name of "permanent white" or blanc fixe.
The pigment which gives the characteristic colour to the skin is deposited in the protoplasm of the outer ends of the cells in the form of small granules.
It is used as a pigment under the name "chrome yellow."
When digested for some time with a caustic alkali it is converted into a basic salt, PbCrO 4 PbO, a pigment known as "chrome red."
It contains chromatophores in many species, coloured by a mixed lipochrome pigment which FIG.
Copper also helps convert amino acids into pigment, thereby adding color to hair and skin.
Melanin lenses are made with a synthetic form of this pigment that never loses its potency.
The ink then becomes a permanent feature, enhancing or replacing the patient's original pigment.
If using powder liner, press an angled brush into the pigment, then press along your lash line.
Birthmarks are groups of malformed pigment cells or blood vessels.
Skin contains a protective pigment called melanin.
The root differs from the shoot in the characters of its surface tissues, in the absence of the green assimilative pigment chlorophyll, in the arrangement of its vascular system and in the mode of growth at the apex, all features which are in direct relation to its normally subterranean life and its fixative and absorptive functions.
Starch grains may often be seen in contact with the pigment crystals.
As early at least as the ith century the art of extracting a blue pigment from lapis lazuli was practised, and from the beginning of the 16th century this pigment began to be imported into Europe from "over the sea," as azurrum ultramarinum.
The ' haemoglobin may be transformed into haematoidin, a pigment that does not contain iron, or into a pigment which does contain iron, haemosiderin.
The professional is able to regulate the depth of the deposit of the pigment with this applicator, which helps make the procedure safer.
It has been suggested by several botanists, with considerable plausibility, that the ultra-violet or chemical rays can be absorbed and utilized by the protoplasm without the intervention of any pigment such as chlorophyll.
The pigment is also principally localized in this layer, although sometimes it is present even deeper down within the musculature.
Of greater practical importance is a basic carbonate, substantially 2PbCO 3 Pb(OH) 2, largely used as a white pigment under the name of "white lead."
When carbon dioxide is passed into this solution the whole of the added oxide, and even part of the oxide of the normal salt, is precipitated as a basic carbonate chemically similar, but not quite equivalent as a pigment, to white lead.
This pigment is of a light yellow colour, and contains a fatty substance that reacts to the fat-staining reagents.
In hepatogenous pigmentation (icterus or jaundice) we have the iron-free pigment modified and transformed by the action of the liver cells into bile pigment (bilirubin).
If a solution of the pigment is placed in the path of a beam of light which is then allowed to fall on a prism, the resulting spectrum will be found to be modified.
They are lined by cells charged with a yellow or brown pigment, and besides their excretory functions they act as ducts through which the reproductive cells leave the body.
Lead chromate, PbCrO 4, is prepared industrially as a yellow pigment, chrome yellow, by precipitating sugar of lead solution with potassium bichromate.
The vermilion-like pigment which occurs in commerce as "chromered" is a basic chromate, Pb2Cr05, prepared by treating recently precipitated normal chromate with a properly adjusted proportion of caustic soda, or by boiling it with normal (yellow) potassium chromate.
A, Diagram of a retinula of the central eye of a scorpion consisting of five retina-cells (ret), with adherent branched pigment cells (pig).
Trophic and nervous conditions sometimes cause localized deficiency of pigment which produces white areas in the skin.
It is used as a pigment (cadmium yellow), for it retains its colour in an atmosphere containing sulphuretted hydrogen; it melts at a white heat, and on cooling solidifies to a lemon-yellow micaceous mass.
In this case the pigment-cells are endodermal, forming a cup of pigment in which the visual cones are embedded.
The absorption of these rays implies that the pigment absorbs radiant energy from the sun, and gives us some explanation of its power of constructing the carbohydrates which has been mentioned as the special work of the apparatus.
Commercially, barytes is used in the preparation of barium compounds, as a body for certain kinds of paper and cloth, and as a white pigment ("permanent white").
Besides these more highly differentiated organs of vision, more primitive eyes are present in others down to simple stellate pigment specks without any refracting apparatus.
As the mineral only yields from 2 to 3% of the pigment, it is not surprising to learn that the pigment used to be weighed up with gold.
The composition of the pigment is quite similar to that of lapis lazuli; but the constitution of both is uncertain.
A kind of vulcanite which contains a large proportion of vermilion or other mineral pigment is used, under the name of dental rubber, for making artificial gums and supports for artificial teeth.
Exposed to air this mixture is oxidized to the pigment uranium red, U6(NH4)2S09, which is a fine blood-coloured amorphous powder.
Where pigment was present within the cells (sarcoma), the attraction-spheres were represented by quite clear unpigmented areas, sometimes with a centrosome in their midst.
The action of the sun's rays stimulates the cells of the skin to increase the pigment as a protection to the underlying tissues, e.g.
The more highly organized species have often very numerous eyes (Amphiporus, Drepanophorus), which are provided with a spherical refracting anterior portion, with a cellular " vitreous body," with a layer of delicate radially arranged rods, with an outer sheath of dark pigment, and with a separate nerve-twig each, springing from a common or double pair of branches which leave the brain as n.
Most of the rubber now manufactured is not combined with sulphur when in the form of sheets, but is mechanically incorporated with about one-tenth of its weight of that substance by means of the mixing rollers - any required pigment or other matter, such as whiting or barium sulphate, being added.
Sodium uranate, Na2U207, is used as a pigment for painting on glass and porcelain under the name of uranium yellow.
The blood suffers first; its pigment is dissolved out and soaks into the surroundings, imparting to them the pink hue so diagnostic of commencing gangrene.
In addition to its brilliance, vermilion is a pigment of great intensity and durability, remaining unaffected by acid fumes.
This pigment is of great antiquity; Theophrastus called it kibOhov, and prepared it by acting on lead with vinegar, and Pliny, who called it cerussa, obtained it by dissolving lead in vinegar and evaporating to dryness.
Within the cytoplasm are found manifestations of functional activity, in the form of digestive vacuoles, granules, fat, glycogen, pigment, and foreign bodies.
The haematoidin pigment may vary in colour from yellowish or orange-red to a ruby-red, and forms granular masses, rhombic prisms or acicular crystals.
Various solvents, such as benzene, alcohol and chloroform, will dissolve out the pigment, leaving the plastid colorless.
The working of it is not at all completely understood at present, nor can we say exactly what is the part played by the pigment and what is the rfile of the protoplasm of the plastid.
This pigment is usually intracellular, but may be found lying free in the intercellular substance, and is generally in the form of fine granules of a yellowish-brown or brown-black colour.
The Melian earth (yrl M0Xc6.3) was employed as a pigment by ancient artists.