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Food coloring, or color additive, is any dye, pigment or substance that imparts color when it is added to food or drink. They come in many forms consisting of liquids, powders, gels, and pastes. Food coloring is used both in commercial food production and in domestic cooking.

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Carbocyanine dyes are completely insoluble in water or aqueous buffers. Two general methods can be used to deliver the dye.

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An isocyanide is an organic compound with the functional group -N≡C. It is the isomer of the related nitrile, hence the prefix is isocyano. The organic fragment is connected to the isocyanide group through the nitrogen atom, not via the carbon. They are used as building blocks for the synthesis of other compounds. 

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Cyanine dyes are used to label proteins, antibodies, peptides, nucleic acid probes, and any kind of other biomolecules to be used in a variety of fluorescence detection techniques

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Cyanine dyes are used to label proteins, antibodies, peptides, nucleic acid probes, and any kind of other biomolecules to be used in a variety of fluorescence detection techniques

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Iso cyanine
An isocyanine is an organic compound with the functional group -N≡C. It is the isomer of the related nitrile (-C≡N), hence the prefix is isocyano. The organic fragment is connected to the isocyanide group through the nitrogen atom, not via the carbon. They are used as building blocks for the synthesis of other compounds

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Carbo cyanine uses
Carbocyanine dyes can be used as anterograde as well as retrograde tracers. When applied to the retina, DiI and DiO allow one to trace the retinotectal projections

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Cyanine
Cyanines are defined as "synthetic dyes with the general formula R2N[CH=CH]nCH=N+R2↔R2N+=CH[CH=CH]nNR2 in which the nitrogen and part of the conjugated chain usually form part of a heterocyclic system, such as imidazole, pyridine, pyrrole, quinoline and thiazole.Cyanines are used in industry biotechnology

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Food colurent
Food coloring, or color additive, is any dye, pigment or substance that imparts color when it is added to food or drink. They come in many forms consisting of liquids, powders, gels, and pastes. Food coloring is used both in commercial food production and in domestic cooking

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Food coloring, or color additive, is any dye, pigment or substance that imparts color when it is added to food or drink. They come in many forms consisting of liquids, powders, gels, and pastes. Food coloring is used both in commercial food production and in domestic cooking. Food colorants are also used in a variety of non-food applications including cosmetics, pharmaceuticals, home craft projects, and medical devices-Kiruthika. V

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dyes used in paper

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Dyes used in leathers

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FOOD COLOURANTS
Food coloring or color additive is any dye, pigment or substances that impact color when it is added to food or drink. They come in many forms consisting of liquids, powers, gels and pastes.
Food coloring is used both in commercial food production and in domestic cooking.
Food colarants are also used in a variety of non-food applications including cosmetics, pharmaceuticals, home craft projects and medical devices.

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FOOD COLOURANTS
Food coloring or color additive is any dye, pigment or substances that impact color when it is added to food or drink. They come in many forms consisting of liquids, powers, gels and pastes.
Food coloring is used both in commercial food production and in domestic cooking.
Food colarants are also used in a variety of non-food applications including cosmetics, pharmaceuticals, home craft projects and medical devices.

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Food coloring are coloring additive , is any dye, pigment are substance that imparts color when it's added to food or drink . The come in many forms consisting of liquids , powders, paste and gel . Food coloring is used both in commercial food production and in domestic cooking , food colorants are also used in verify of non food application including cosmetics . Pharmaceutical, homs craft projects  and medical devices. By k.kavitha

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Paper industries are  widely using dyes from last so many decades writing and printing paper , tissue -facial, toilet ,towel , napkin  ,copier papers. By k.kavitha

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Food colourant:
Food coloring, or color additive, is any dye, pigment or substance that imparts color when it is added to food or drink. They come in many forms consisting of liquids, powders, gels, and pastes. Food coloring is used both in commercial food production and in domestic cooking. Food colorants are also used in a variety of non-food applications including cosmetics, pharmaceuticals, home craft projects, and medical devices.

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Cyanine dyes are used to label proteins, antibodies, peptides, nucleic acid probes, and any kind of other biomolecules to be used in a variety of fluorescence detection techniques.

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Application of dyes in medical :    dyes used in The medical field today may certainly found as drug colourants in vital staining , tracing and histopathology but some also remain as chemotherapeutics. More modern application include in photosensitisers in light activate therapies for cancer and infection and biocidal dyes for use in medical textile. By k.kavitha

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Cyanine dyes:
Cyanine dyes are characterized by two nitrogen atoms linked by a conjugated polymethine chain containing an odd number of carbon atoms.

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Cyanine dyes:
Cyanine dyes are characterized by two nitrogen atoms linked by a conjugated polymethine chain containing an odd number of carbon atoms.

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Isocyanine dyes:

An isocyanide (also called isonitrile or carbylamine) is an organic compound with the functional group -N≡C. It is the isomer of the related nitrile (-C≡N), hence the prefix is isocyano.The organic fragment is connected to the isocyanide group through the nitrogen atom, not via the carbon. They are used as building blocks for the synthesis of other compounds.

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Cyanine dyes:
Cyanines are defined as "synthetic dyes with the general formula R2N[CH=CH]nCH=N+R2↔R2N+=CH[CH=CH]nNR2 (n is a small number) in which the nitrogen and part of the conjugated chain usually form part of a heterocyclic system, such as imidazole, pyridine, pyrrole, quinoline and thiazole.Cyanines are used in industry biotechnology .

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Application of dyes in leather: leather dyeing involves application of direct and acidic dye, most often with mordant  , in alkaline conditions . These are normally chosen from the textile dyes. Leather used in apperal making requires over all dying where in the color of the surface is the same as that of the cut area.

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Give the details of food colorant:
Food coloring, or color additive, is any dye, pigment or substance that imparts color when it is added to food or drink. They come in many forms consisting of liquids, powders, gels, and pastes. Food coloring is used both in commercial food production and in domestic cooking.

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Cyanine dyes are formed where two nitrogen atoms are joined by a polymethine chain. both Nitrogen atoms are independently part of hetro aromatic moiety such as pyyrole ,imidazole, thiazole, pyridine, quinoline, iodine, benzothiazole etc..,

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Food colorant or food additive  , is any dye pigment or substance  that imports colors  when it is added to food or drinks . They come  in many forms  consisting of liquids , powdering , gels and pastes . This used in both commercial  food production and  in domestic cooking

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Cyanin
Cyanines are defined as  " synthetic dyes " in which the nitrogen and part of the conjugated part usually form  part of the heterocyclic system , such as   quinoline , pyridine  and pyyrole . Cyanine are used in industrial  biotechnology  ( labelling , analysis ,  biomedical  imaging)

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Cyanine dyes are formed where two nitrogen atoms are joined by a polymethine chain. Both nitrogen atoms are independently part of a heteroaromatic moiety, such as pyrrole, imidazole, thiazole, pyridine, quinoline, indole, benzothiazole, etc.

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Cyanine dyes are formed where two nitrogen atoms are joined by a polymethine chain. Both nitrogen atoms are independently part of a heteroaromatic moiety, such as pyrrole, imidazole, thiazole, pyridine, quinoline, indole, benzothiazole, etc.

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Dyes used in the medical field today may certainly be found as drug colourants, in vital staining, tracing and histopathology, but some also remain as chemotherapeutics. More modern applications include photosensitisers in light-activated therapies for cancer and infection and biocidal dyes for use in medical textiles.

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Dyes used in the medical field today may certainly be found as drug colourants, in vital staining, tracing and histopathology, but some also remain as chemotherapeutics. More modern applications include photosensitisers in light-activated therapies for cancer and infection and biocidal dyes for use in medical textiles.

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Dyes for paper and leather:
Basic class of dyes find application for colouring paper but other class of dye can also be used depending upon the end uses. In the case of preparation of copy papers where there is no need to have carbon paper. Basically colour forming precursors are apply to paper which are converted into parent colours by hard pressing. In photography also certain colour forming components are suitably coupled with aromatic diamines capable of getting oxidised and these are used along with the silver halide. Even in development of black and white pictures use is made of certain diazonium components along with coupling components to develop the picture from the silver halide. Example, dyes used in paper-safranine T, auromine.
The dyestuffs employed in leather industry belong to acid class, metal complex class and basic class. Polyaso and azo types of dyes find applications in dying leather. Example, chrome leather black A.

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Leather dyeing involves application of direct and acidic dyes, most often with mordant, in alkaline, conditions. These are normally chosen from the textile dyes. Leather used in apparel making requires overall dyeing wherein the color of the surface area is the same as that of the cut area.

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Leather dyeing involves application of direct and acidic dyes, most often with mordant, in alkaline, conditions. These are normally chosen from the textile dyes. Leather used in apparel making requires overall dyeing wherein the color of the surface area is the same as that of the cut area.

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Phthalocyanine (H ₂ Pc) is a large, aromatic, macrocyclic, organic compound with the formula (C₈H₄N₂)₄H₂ and is of theoretical or specialized interest. It is composed of four isoindole units linked by nitrogen atoms. H₂Pc has a two-dimensional geometry and a ring system consisting of 18 π-electrons. The extensive delocalization of the π-electrons affords the molecule useful properties, lending itself to applications in dyes and pigments. Metal complexes derived from Pc2−
, the conjugate base of H₂Pc, are valuable in catalysis, organic solar cells, and photodynamic therapy.

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Isocyanin:
An isocyanide is an organic compound with the functional group -N≡C. It is the isomer of the related nitrile, hence the prefix is isocyano. The organic fragment is connected to the isocyanide group through the nitrogen atom, not via the carbon. They are used as building blocks for the synthesis of other compounds.

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Cyanidin cation is an anthocyanidin cation that is flavylium substituted at positions 3, 3', 4', 5 and 7 by hydroxy groups. It has a role as a metabolite, a neuroprotective agent and an antioxidant.  M.Sangeetha

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Food coloring, or color additive, is any dye, pigment or substance that imparts color when it is added to food or drink. They come in many forms consisting of liquids, powders, gels, and pastes. Food coloring is used both in commercial food production and in domestic cooking. M.Sangeetha

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CYANINE, ISOCYANINE, CARBOCYANINE

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Paper industries are widely  using dyes form last so many decades.  Writing and printing paper.  Tissue, facial toilet,towel, napkin and copier papers... By A.SNEHA

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Dyes are used in medical field today more modern applications include photosensitor in light activated therapies for cancer and infection and biocidal dyes for use in medical textiles... By A.SNEHA

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S. KIRUBA SNEKA

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Leather dyeing involves  application of direct and acidic dyes most often with mordant in alkaline  conditions.  These are normally choose in textile dyes.  Leather also used in colouring to the surface area ... By A.Sneha

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• Food Colourants are generally used to make food more attractive, appealing, appetizing, and informative. There are naturally available Food colours, they are saffron, turmeric, chlorophyll etc..,
• Nowadays synthetic dyes are used mostly because, ✓ They offer variety of shades,
✓ They are cheap and easy to use.
• Some of the conditions of Food Colourants that are used in foods should have,
✓ Not interact with other food items.
✓ Harmless to humans.
✓ Stable to hear and light.
• The food Colours are to be certified and permitted on the basis of these analysis, and then used in food items.

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different  colours  were  obtained  with  the  use  of  common  and  traditional  mordants  such  as  copper  sulphate, ferrous sulphate and potash alum. Priyadharshini

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A.Sneha

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A.Sneha

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A.Sneha

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Modern applications include photosensitisers in light-activated therapies for cancer and infection
Priyadharshini

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Priyadharshini

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Food colouring come in many forms consisting of liquids, powders,gels and pastes.  Food colouring is used both in commercial preparation or production and in domestic cooking.  Food colorants are also used in variety of non food application including cosmetics, pharmaceuticals, home craft  projects and medical devices.

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P. Priyadharshini

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A.Sneha

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A.Sneha

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A.Sneha , Quinoline blue dye

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A.Sneha

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application of phthalocyanine

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applications of phthalocyanine

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Metallophthalocyanines are important industrial pigments, blue to green in color, used primarily in inks and for coloring plastics and metal surfaces. - Mohanapriya. V

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Food coloring:
Food coloring, or color additive, is any dye, pigment or substance that imparts color when it is added to food or drink. They come in many forms consisting of liquids, powders, gels, and pastes. Food coloring is used both in commercial food production and in domestic cooking. Food colorants are also used in a variety of non-food applications including cosmetics, pharmaceuticals, home craft projects, and medical devices. - Mohanapriya. V

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Dyes may be defined as the different types of colouring particles, differ each type from other type in chemical composition and are used for colouring fabrics, yarns in different fine of colors and shades and which are completely soluble in liquid substance. They are colored organic compounds that are used to impart color to various substrates. Dyes are widely applied on paper, leather, fur, hair, drugs, cosmetics, waxes, greases, plastics and textile materials. There are different types of dyes for dyeing textile goods. These dyes have different nature in fiber. It depends on fiber characteristics, chemical structure etc. - Mohanapriya. V

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Carbocyanin:
Carbocyanine dyes (cyanines) remain the most prevalent fluorophores used for in vivo imaging. ... Cyanines are formally compounds with two nitrogen atoms linked by an odd number of methene units. The nitrogen atoms are parts of the heterocyclic units (such as indole, benzoxazol, or benzothiazol).- Mohanapriya. V

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Definition of isocyanin:
Any of several simple cyanine dyes in whose structure the carbon atom joining the two quinoline or other heterocyclic rings is attached at different positions in the two rings. - Mohanapriya. V

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Cyanin:
Cyanines are defined as "synthetic dyes with the general formula R2N[CH=CH]nCH=N+R2↔R2N+=CH[CH=CH]nNR2 (n is a small number) in which the nitrogen and part of the conjugated chain usually form part of a heterocyclic system, such as imidazole, pyridine, pyrrole, quinoline and thiazole." Cyanines are used in industry biotechnology (labeling, analysis, biomedical imaging). - Mohanapriya. V

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Carbocyanine

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Cyanine and isocyanine

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A cyanobacterium stained green with cyanine dye

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Cyanine dyes are used to label proteins, antibodies, peptides, nucleic acid probes, and any kind of other biomolecules to be used in a variety of fluorescence detection techniques

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The application of phthalocyanines, in areas as tribologically active systems, functional composite materials and coatings, and supramolecular chemistry.

P. Priyadharshini

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Cyanine are synthetic dyes in which nitrogen and part of the conjugated chain form a part of heterocyclic system such as pyrrole, pyridine etc.. It is used in industry biotechnology. By S.Ponsivaranjani

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The term 'colorant' is commonly used to describe the entire range of colouring materials that includes dyes and pigments. Dyes and pigments are both sources of colour but the distinction is of fundamental importance based on different chemical

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The term 'colorant' is commonly used to describe the entire range of colouring materials that includes dyes and pigments. Dyes and pigments are both sources of colour but the distinction is of fundamental importance based on different chemical

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Food additives are used to protect food, increase quality and extend shelf life in many stages, from production to consumption of food. Additives used in the food industry are added to the food during preparation, production, packaging and storage stages

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Food additives are used to protect food, increase quality and extend shelf life in many stages, from production to consumption of food. Additives used in the food industry are added to the food during preparation, production, packaging and storage stages

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Food colouring is any substance that is added to food or drink to change its colour . Food colouring is both used in commercial food production and in cooking at home.

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Food colouring is any substance that is added to food or drink to change its colour . Food colouring is both used in commercial food production and in cooking at home.

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Explain metalpthalocyanin and its applications

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Give the details of food colorant