|
Tragacanth
Tragacanth is a natural gum obtained from the dried sap of several species of Middle Eastern Fabaceae, legumes of the genus ''Astragalus'', including ''Astragalus adscendens, A. adscendens'', ''Astragalus gummifer, A. gummifer'', ''Astragalus brachycalyx, A. brachycalyx'', and ''Astragalus tragacantha, A. tragacantha''. Some of these species are known collectively under the common names "goat's thorn" and "locoweed". The gum is sometimes called Shiraz gum, shiraz, gum elect or gum dragon. The name derives from the Greek language, Greek words ''tragos'' (meaning "goat") and ''akantha'' ("thorn"). Iran is the biggest producer of this gum. Gum tragacanth is a viscous, odorless, tasteless, water-soluble mixture of polysaccharides obtained from sap that is drained from the root of the plant and dried. The gum seeps from the plant in twisted ribbons or flakes that can be powdered. It absorbs water to become a gel, which can be stirred into a paste. The major fractions are known as trag ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Diatragacanth
In pre-modern medicine, the name diatragacanth was applied to certain powders that contain the natural gum tragacanth as its basis. There are two kinds: ''cold'' and ''hot''. Powder of ''cold'' diatragacanth is composed of the gums tragacanth and arabic, liquorice, starch, white poppy seed, and the four great cold seeds (cucumber, gourd, watermelon, and melon). It was said to be good thicken, and soften the too sharp, and subtile serous humours Humorism, the humoral theory, or humoralism, was a system of medicine detailing a supposed makeup and workings of the human body, adopted by Ancient Greek and Roman physicians and philosophers. Humorism began to fall out of favor in the 1850s ... occurring in the chest, to assuage coughs, and promote spitting. Powder of ''hot'' diatragacanth is composed of gum tragacanth, cinnamon, hyssop, almonds, linseed, and fenugreek, liquorice, juice of liquorice, and ginger. It was said to be good against asthmas, to promote expectoration, streng ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Astragalus Tragacantha
''Astragalus tragacantha'', commonly known as astragale de Marseille or coussin-de-belle-mère, is a species of milkvetch in the family Fabaceae. Greuter,W. et al. (Eds.), 1989 ''Med-Checklist Vol.4 (published)'' Linnaeus,C.von, 1753 ''Sp.Pl.'' ILDIS World Database of Legumes The plant is about 10 to 25 cm in height with white, purple tinged flowers that bloom in April and March. Tragacantha grows in sandy soil around beaches and is native to France, Spain, and the Mediterranean. References tragacantha Flora of Spain Flora of Fran ...[...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Astragalus
''Astragalus'' is a large genus of over 3,000 species of herbs and small shrubs, belonging to the legume family Fabaceae and the subfamily Faboideae. It is the largest genus of plants in terms of described species. The genus is native to temperate regions of the Northern Hemisphere. Common names include milkvetch (most species), locoweed (in North America, some species) and goat's-thorn ( ''A. gummifer'', ''A. tragacantha''). Some pale-flowered vetches ('' Vicia'' spp.) are similar in appearance, but they are more vine-like than ''Astragalus''. Description Most species in the genus have pinnately compound leaves. There are annual and perennial species. The flowers are formed in clusters in a raceme, each flower typical of the legume family, with three types of petals: banner, wings, and keel. The calyx is tubular or bell-shaped. Ecology ''Astragalus'' species are used as food plants by the larvae of some Lepidoptera species including many case-bearing moths of the gen ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Astragalus Gummifer
''Astragalus gummifer'' (tragacanth, gum tragacanth milkvetch), is a small woody evergreen shrub, with a typical height and spread of 30 cm at maturity, indigenous to western Asia, specifically Iraq and Turkey. This nitrogen fixing plant bears hermaphroditic flowers, which are bee-pollinated. It has many medical, culinary, and material uses.“Astralagus gummifer” Practical Plants http://practicalplants.org/wiki/Astragalus_gummifer Tragacanth gum ''Astragalus gummifer'' produces special exudate gums that act as a natural defense mechanism for the shrub. Research has shown the function of these gums to service plants of semiarid environments, released when the bark of the shrub gets damaged in order to cover the wound to prevent infection and dehydration. The gum originally an aqueous solution dries into hardened lumps when it comes into contact with air and sunlight.Verbeken, Dirk. "Exudate Gums: occurrence, production, and applications" Applied Microbiology and Biotechnol ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Paper Marbling
Paper marbling is a method of aqueous surface design, which can produce patterns similar to smooth marble or other kinds of stone. The patterns are the result of color floated on either plain water or a viscous solution known as size, and then carefully transferred to an absorbent surface, such as paper or fabric. Through several centuries, people have applied marbled materials to a variety of surfaces. It is often employed as a writing surface for calligraphy, and especially book covers and endpapers in bookbinding and stationery. Part of its appeal is that each print is a unique monotype. Procedure There are several methods for making marbled papers. A shallow tray is filled with water, and various kinds of ink or paint colors are carefully applied to the surface with an ink brush. Various additives or surfactant chemicals are used to help float the colors. A drop of "negative" color made of plain water with the addition of surfactant is used to drive the drop of color int ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Binder (material)
A binder or binding agent is any material or substance that holds or draws other materials together to form a cohesive whole mechanically, chemically, by adhesion or cohesion. In a more narrow sense, binders are liquid or dough-like substances that harden by a chemical or physical process and bind fibres, filler powder and other particles added into it. Examples include glue, adhesive and thickening. Examples of mechanical binders are bond stones in masonry and tie beams in timber framing. Classification Binders are loosely classified as organic ( bitums, animal and plant glues, polymers) and inorganic ( lime, cement, gypsum, liquid glass, etc.). These can be either metallic or ceramic as well as polymeric depending on the nature of the main material. For example, in the compound WC-Co (Tungsten Carbide used in cutting tools) Co constitutes the binding agent for the WC particles. Based on their chemical resistance, binders are classified by the field of use: non-hydra ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Natural Gum
Natural gums are polysaccharides of natural origin, capable of causing a large increase in a solution's viscosity, even at small concentrations. They are mostly botanical gums, found in the woody elements of plants or in seed coatings. Human uses They are used in the food industry as thickening agents, gelling agents, emulsifying agents, and stabilizers, and in other industrial adhesives, binding agents, crystal inhibitors, clarifying agents, encapsulating agents, flocculating agents, swelling agents, foam stabilizers, etc. When consumed by humans, many of these gums are fermented by the microbes that inhabit the lower gastrointestinal tract (microbiome) and may influence the ecology and functions of these microscopic communities. Examples Natural gums can be classified according to their origin. They can also be classified as uncharged or ionic polymers ( polyelectrolytes). Examples include (with E number E numbers ("E" stands for "Europe") are codes for substance ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fabaceae
The Fabaceae or Leguminosae,International Code of Nomenclature for algae, fungi, and plants. Article 18.5 states: "The following names, of long usage, are treated as validly published: ....Leguminosae (nom. alt.: Fabaceae; type: Faba Mill. Vicia L.; ... When the Papilionaceae are regarded as a family distinct from the remainder of the Leguminosae, the name Papilionaceae is conserved against Leguminosae." English pronunciations are as follows: , and . commonly known as the legume, pea, or bean family, are a large and agriculturally important family of [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Astragalus Adscendens
''Astragalus brachycalyx'', the Persian manna or manna, whose name is derived from the Latin ‘brachy’ meaning short, and ‘calyx’ referring to the sepal of the flower, is a species of legume commonly found on rocky mountain slopes in western Asia, from western Iran and northern Iraq to Turkey, and is commonly used as a source of gum tragacanth Tragacanth is a natural gum obtained from the dried sap of several species of Middle Eastern legumes of the genus ''Astragalus'', including '' A. adscendens'', '' A. gummifer'', '' A. brachycalyx'', and '' A. tragacantha''. Some of these species .... References brachycalyx Plants described in 1843 Flora of Western Asia Flora of Iraq {{Astragalus-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pastels
A pastel () is an art medium in a variety of forms including a stick, a square a pebble or a pan of color; though other forms are possible; they consist of powdered pigment and a binder. The pigments used in pastels are similar to those used to produce some other colored visual arts media, such as oil paints; the binder is of a neutral hue and low saturation. The color effect of pastels is closer to the natural dry pigments than that of any other process. Pastels have been used by artists since the Renaissance, and gained considerable popularity in the 18th century, when a number of notable artists made pastel their primary medium. An artwork made using pastels is called a pastel (or a pastel drawing or pastel painting). ''Pastel'' used as a verb means to produce an artwork with pastels; as an adjective it means pale in color. Pastel media Pastel sticks or crayons consist of powdered pigment combined with a binder. The exact composition and characteristics of an individua ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Emulsifier
An emulsion is a mixture of two or more liquids that are normally immiscible (unmixable or unblendable) owing to liquid-liquid phase separation. Emulsions are part of a more general class of two-phase systems of matter called colloids. Although the terms ''colloid'' and ''emulsion'' are sometimes used interchangeably, ''emulsion'' should be used when both phases, dispersed and continuous, are liquids. In an emulsion, one liquid (the dispersed phase) is dispersed in the other (the continuous phase). Examples of emulsions include vinaigrettes, homogenized milk, liquid biomolecular condensates, and some cutting fluids for metal working. Two liquids can form different types of emulsions. As an example, oil and water can form, first, an oil-in-water emulsion, in which the oil is the dispersed phase, and water is the continuous phase. Second, they can form a water-in-oil emulsion, in which water is the dispersed phase and oil is the continuous phase. Multiple emulsions are al ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
