Chapter 2
related documents and research project to study the quality of screen printing ink color cloth from the extracted from Roselle who study war keep documents related to the project. The following 1 following
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3 Roselle 2. Distilled water.Urea
4. Sodium bicarbonate
5. Alginate
6. Cotton 7 meter light absorption (UV-VIS Spectrophotometer)
8 viscosity meter (Brookfiled)
1. Roselle (Roselle)
1.1 Figure 1 Roselle. Scientific classification
Kingdom:Plants (Plantae)
I: Category: Magnoliophyta Magnoliopsida
ranks: Malvales
family: Malvaceae
family: Hibiscus
species: H.? Sabdariffa
ชื่อทวินาม: Hibiscus sabdariffa L.
.A small shrub, approximately 3 - 6 cubits, stem and branches and leaves, purple red, many models. The smooth edges, sometimes there is a notch concave 3 wavy. The flowers are pink flowers in the middle are dark over the outer edge of the petals.Born as violet red inner seed coat The propagation by seed planting should be planted in the rainy season. To till the soil before planting, dig the planting holes each 2-3 seeds sprout out enough. To withdraw the weak get the strong.Fertilizer to loosen dirt, weed out the parts. Use of medicine and food is the sepals and petals flower The red pigment in the anthocyanins (Anthocyanin) which was dissolved in the water!1.2 compounds in Roselle
substance found was the name, flavonoid substances crysanthemin delphinidin - 3-O sambubioside myricetin,,, Hibiscitrin gossypitrin, group name, phenylpropanoid ortho - coumaric acid para - coumaric acid,,Ferulic acid indicated that the extract of Roselle has antioxidant activity (antioxidant) and has activity against liver cancer cells and prostate cancer. Effects of diuretic, lower blood pressure, reduce blood fat reducing sugar in the blood.(Gram positive bacteria) has the effect of sterilization in the oral cavity and antipyretic
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2. Distilled picture 2 distilled water
.Is pure water. Because of the evaporation process of water condensation. Liquor is clean, free of dirt that can be seen and the pH neutral or is a weak acid. The electrical conductivity is low.Dirt, almost all were removed in the refining process, that is, in the distillation process that must be followed to the evaporation water steam and condensation is a drip. Without the elements. The water DI (Deionized water) may also have dirt contamination.A process in which water production quite slow. To obtain pure distilled water truly
.Distilled water is used in the job such as industrial laboratory, clearing, testing, ion exchange, in a car battery Laser cutting, etc., still mostly used in the laboratory.Water water water DI without ion () that are affordable. Used for laboratory and industrial water DI widely used is used to fill the batteries in the automotive components of the elements. Found in water DI may make the age.Shepherd and water at a high price. Often use distilled water without elements to reduce the risk of harm to the fish breeding. The distilled water was used in water steam ironSteaming has
.Distilled water should be kept at normal room temperature between 20 - 30 degrees Celsius. Keep away from sunlight and humidity should be kept in sealed containers Avoid heat and cold, too. When open water.Which can affect the electrical conductivity in particular. The gas carbon dioxide from the atmosphere. So it should be kept in sealed containers of distilled water as soon as possible!One of the factors which indicate the purity of the water is, the conductivity. The value of low conductivity shows the impurities in water can be broken down into ion has less volume.The current meter of electric conductor that is easy to use and convenient
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3. Urea (Urea)
Figure 3 urea
physical and chemical properties of general chemistry: Carbamide
name synonym: Carbonyl diamine, other; Carbamimidic acid; Isourea; Aquadrate; Ureaphil; Ureophil; Aquacare / HP; Nutriplus; Urecare; Urederm;
molecular formula:
structural formula. :
color: status: solid powderWhite
smell: ammonia dilution
molecular weight: 60.16
melting / freezing (c): 132-135
the weight (water = 1). : 1.335
pH (pH): 5.6-7.5 that 25 C
factor unit converter 1 ppm = 2.46 mg/ cubic meter, or 1 mg / m3 = 0.406 ppm that 25 องศ C
physical and chemical data of other: this compound can be dissolved in ethanol. And methanol
stability and reaction (Stability and Reaction)
- chemical stability:
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