CTS0204ISSUES IN CREATIVE TEACHING IN SCIENCE
NAME : LEONG CHEANG YENG
IC NUMBER : 820725-07-5266
COURSE : KDP14M31
CREATIVE TEACHING IN SCIENCE ( SR )LECTURER : PN. MAGESWARY A/P KARPUDEWAN
The definition of natural pigmentA pigment is the material that changes the color of light it reflects as the result of selective color absorption. This physical process differs from fluorescence, phosphorescence, and other forms of luminescence, in which the material itself emits light. Natural edible pigment is derived from natural resources such as natural plant roots, stems, leaves, flowers, fruits and animals, microorganisms such as edible pigment, food coloring, is a mixture of many different components. As the wide variety of sources, composition complex variety of natural pigments. In biology, a pigment is any colored material of plant or animal cells. Many biological structures, such as skin, eyes, fur and hair contain pigments (such as melanin) in specialized cells called chromatophores. Many conditions affect the levels or nature of pigments in plant, animal, some protista, or fungus cells. For instance, Albinism is a disorder affecting the level of melanin production in animals.Pigment color differs from structural color in that it is the same for all viewing angles, whereas structural color is the result of selective reflection or iridescence, usually because of multilayer structures.
According to extraction methods, the natural pigment can be divided into four main categories: namely, plant and animal body formed by the juice or liquid solvent extraction or solid color; body of animal and plant dry powder obtained by grinding pigment; by microbial fermentation , metabolites separated into liquid or powder for further processing of the pigment; using natural products as raw material, obtained by the enzyme and the pigment. A source of natural pigmentGenerally derived from the natural pigment components such as the Red Beet, Grape and Pepper of these foods has been the recognition and acceptance of consumers, therefore, use of these food sources of natural pigments to be better consumers, better and safer to use. Most come from plant pigments.
The characteristics of plant pigmentsThe vast majority of plant pigment without side effects, high security. Most of the anthocyanin class of plant pigments, carotenoids, flavonoids compounds, are a class of bioactive substances, is herbal and health food products in the functional active ingredients. In view of plant pigments as a coloring additive used in food, medicine and cosmetics, with capacity of less than the amount of medical and health care products effect the ratio. In the health food applications, this type of plant pigment respectively to play in strengthening the body's immune function, anti-oxidation, reducing blood lipids and other auxiliary role; in ordinary foods, so can play an enhanced role in support of nutrition and anti-oxidation.
The application of natural pigmentsIn the development and application of natural pigments, the China's natural food coloring product times the output of caramel largest annual output accounting for about 86% of natural food pigments, mainly for the domestic brewing industry and beverage industry. Followed by the red yeast red, sorghum red, gardenia yellow, radish red, sodium copper chlorophyll, carotene, cocoa shell color, turmeric, etc., mainly used in the preparation of wine, sweets, cooked meat products, jelly, ice cream, artificial crab meat and other foods. With the further improvement of living standards of our people and return to nature, eating all-natural based products will become the mainstream of food consumption in the future, the domestic food industry demand for natural food coloring will continue to grow and will also open up the natural pigment in the pharmaceutical , Japan and so on in the broader fields of application.
Natural pigment in the textile industryIn addition to the natural pigment widely used in the food industry, the textile, apparel, home textiles industry has been widely used as natural dyes, but not all pigments can be used as dye. Textiles need washing, friction fastness, fastness, light fastness there are more requests. However, as a natural plant extract the pigment dye to follow the trend of the times.
waterThe types of food coloring
According to their sources of food coloring can be divided into two main categories: (1) natural pigment; (2) synthesis of pigment. China's approval of allowing the use of natural pigments for food, 48 species, including natural -carotene, beet red, turmeric, safflower yellow, more orange-red lac red, chili red, orange pepper, caramel color (without ammonia production ), caramel color production of caramel color (plus ammonia production), red rice red, yellow chrysanthemum extract, black beans red, sorghum red, corn yellow, red radish; cocoa shell color, red yeast rice, red yeast red, Basella alba red, Black Galen Red, Gardenia yellow, Gardenia blue, sea buckthorn yellow, rose tomato red, acorn-shell brown, NP Hung, multi-Hui Ke brown, red mulberry, natural mustard red, Rosa laevigata brown; curcumin, peanuts Agricultural red, grape skin red; Lan spindles fruit red; algae blue, plant carbon black, Buddleia yellow, Lithospermum red; Tea yellow pigment: Tea green pigment, citrus yellow, marriage Annatto (Redwood Su / Su-down rosewood) Cochineal red, iron oxide (black) and so on. These natural pigments from plants, microorganisms or animals to use physical methods to extract the edible parts of crafted, in that 48 varieties of natural pigments, at present China's major production, use and export of 40 kinds of products, including caramel, chili red, -carotene, sodium copper chlorophyll, sorghum red, red yeast rice and so on.
Paprika Oleoresin(Chilli Red Color)
Origin:High-quality chilliAppearance:Dark-red oil liquidProcessing:A kind of natural pigment prepared by the extration of chillisDescription:It is a kind of dark-red colourful oil liquid,a fine food colour with good mobility.It is light-resistant,hot-resistant,acid-resistant,alkali-resitant and will not be affected by metal ion.It will be soluble it is qualified for the internation standard of FAO/WHO and GB10783-1996Component:Capsanthin and Capsorubin Using Mode:It is widely used for the colour of instant noodles,aquatic products,meat ,cake,salad ,etc
Origin:High-quality chilliAppearance:Dark-red oil liquidProcessing:It is prepared and extracted from the high-qualitied chillies with the scientific technology Description:A kind of dark-red colourful oil liquid,a fine food colour with good mobility.It is light-resistant,hot-resistant,acid-resistant,alkali-resistant and will not be affected by metal ion,is will be soluble in oil and ethanol.It is qualified for the internation standard of FAO/WHO and GB10783-1996Component:Capsanthin and Capsorubin Using Mode:It can be used as food colour and food seasonings ,and also the raw material of Paprika Oleoresin(Red chilli color)
Supercritical Paprika Oleoresin:
Origin:High-quality chilliAppearance:Dark-red oil liquidProcessing:Use the supercritical CO2 technology to refine the Paprika Oleoresin(Red Chilli Color)Description:The product use the the supercritical CO2 technology to refine the Paprika ,the quality has increased greatly ,has the features of high purity,low dissoluble leftover,low metal ion,less impurity and not spicy.The usage value has been increased greatly it is qualified for the internation standard of FAO/WHO and GB10783-1996Component:Capsanthin and Capsorubin Using Mode:It is widely used for the colour of instant noodles,aquatic products,meat ,cake,salad ,etc
Origin:High-quality chilliAppearance:Dark-red oil liquidProcessing:A kind of natural pigment prepared by the extraction of chillies Description:It is a kind of dark-red viscous liquid with pure and very hot taste.It is light-resistant,hot-resistant,acid-resistant,alkali-resistant and will not be affected by metal ion.It will be soluble in oil and ethanol.It is qualified for the internation standard of FAO/WHO and GB10783-1996Component:Its efficient components are capsaicin,protein,amino acid and suger.It also contains some Paprika Oleoresin (Red chilli color) Using Mode:It is widely use as the seasoning for all kinds of hot food or raw materials at food plants,or used directly for cooking in restaurant ,dinning-room or familiy.
Origin:Marigold Oleoresin Appearance:Dark-brown oil cream Processing:Prepared by the extraction of marigold pellets by scientific method Description:Soluble in oil and ethanol but in water,Light-resistant,hot-resistant,alkali-resistant Component:XanthophyllsUsage:Widely used in various kinds of fodder
Origin:Perilla leavesAppearance:Dark-red liquidProcessing:It is prepared by extraction of natural plant-perilla leaves Description:It is a kind of water soluble natural pigment which is steady under the acid condition.In solution of PH=2-3,it is purple-red and very colourful It is qualified for the internation standard of FAO/WHO and GB10783-1996 Using Mode:It is widely use as colour in fodddr,pastries ,candy,tin,drink and dairy products
Red Cabbage Color:
Red Cabbage Color is also called red cabbage pigment, for short red cabbage, colorful cabbage, it is a solid and liquid water-soluble pigment adopting purple-ball cabbage (a kind of vegetable), extracting the purple pigment on the surface of the cabbage with scientific knowledge, with separation and refi