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Product Description

Description
Bacterial Alpha-Amylase TB-4 is produced from selected strains of Bacillus subtilis through submerged fermentation, extraction and refining process. It can rapidly decreases the viscosity of the gelatinous starch solution by randomly hydrolyzing starch, glycogen and its degradation products within the alpha-1, 4 glycosidic bonds and produces soluble dextrins and oligosaccharides. 
Alpha-Amylase TB-4 is suitable for desizing of textiles sized by starchy materials, particularly fits to those textiles that are not heat resistance, such as cotton, silk, synthetic fabrics. The powerful amylase activity of TB-4 is capable to break down the starches contained in the textiles into soluble polysaccharides, thus makes it washed out easily. 

Product Characteristics
Declared Enzyme:       Alpha-Amylase
Systematic Name: EC 3.2.1.1, alpha -1, 4–glucan 4-glucanohydrolase
Activity: 4,000 U/ml (minimum)
Appearance: Sepia brown liquid
Product pH: 5.5 to 7.0
Specific gravity: 1.10 to 1.25 g/ml


Effect of pH 
TB-4 is active at pH ranges from 6.0 to 7.0 with an optimum pH at 6.0. It can be inactivated dramatically at pH below 5.0.

Effect of Temperature 

TB-4 is active at temperatures from 30 to 90°C, with an optimum temperature range from 60 to 90°C. At temperatures from 70 to 90°C, the reaction speeds up with the temperature rises while the enzyme inactivation also speeds up. 

Concentration of Calcium

Calcium ion plays a protective role for the stability of alpha-amylase activity for TB-4. Its activity may disappear completely without the presence of calcium ion. 

Inhibitors
Copper, titanium and cobalt ions are moderate inhibitors for TB-4, whereas aluminum, lead and zinc ions act as strong inhibitors. 

Benefits
Use of TB-4 enables easy and efficient desizing without any damage to the fabrics and mild operational conditions without any pollution.

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