According to the size of sugar shipments, in June, the volume of Sinotrans shipments was the largest, accounting for 56% of the total foreign transport volume in the month; the amount of foreign transport in the east of China was slightly less, accounting for 26% of the total foreign transport of the month; Shipments accounted for 17% of the total monthly shipments; North China North-East shipments accounted for 1% of the total monthly shipments.
The production and quality of enzyme preparations produced by plants are unstable due to the influence of growth area, season, climate, etc. The enzymes produced by animals are mainly extracted from the glands of slaughtered livestock, and the source is limited; only enzymes produced by microorganisms can meet the needs of any scale, with high yield and stable quality. Microbial enzyme preparations can not only replace the main types of animal and plant enzyme preparations with the same performance, but also produce high-temperature-amylases that act as catalysts at 100°C and detergent proteases that act at pH 10-12. In the 1940s, the microbial enzyme preparation industry developed rapidly. At present, the production of enzyme preparations is mainly based on deep fermentation, supplemented by semi-solid fermentation, and the ability of the strains to produce enzymes has also been greatly improved. The immobilized enzyme and immobilized cell technology developed in the 1960s and 1970s enabled the enzyme to be used repeatedly and continuously reacted, and its scope of application was also expanded. At present, in addition to the food and textile industries, microbial enzyme preparations are also used in daily chemistry, chemicals, pharmaceuticals, feed, papermaking, building materials, biochemistry, clinical analysis and other aspects, becoming an important sector of the fermentation industry.
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