In this study, Lactobacillus paracasei LZ9077 was used as a test strain to investigate the application of this bacterium and commercial fermenter agents in fermented milk. The acid production ability, the number of live bacteria, sensory evaluation and other evaluation indexes were used for process optimization. The optimal fermentation conditions were obtained by single factor test and orthogonal test, and the changes of yogurt during fermentation were determined. The results showed that the optimal fermentation conditions were as follows: the inoculum amounts of L. paracasei LZ9077 and commercial fermenter were 4% (V/V) and 0.1% (m/V), respectively, and the fermentation time was 6 h. The addition of L. paracasei LZ9077 increased the number of viable bacteria and the acid-producing efficiency of the fermented milk, and the number of viable bacteria was up to 9.22 (lg (CFU/mL)) at the end of the fermentation, and the titration acidity was (99.94 ± 0.36) °T, and the viscosity and stability of yoghurt were significantly improved.

To normalize the newly established administrative detention system for the revised Food safety Law, starting with the concept and characteristics of the administrative detention system for food safety regulation, this paper analyzes the implementation situation and flaws of the existing administrative detention procedure by comparing with other forms of detention, and it puts forward some ideas and suggestions regarding the legislation and procedural normalization of administrative detention in food safety regulation. If serious violations of the Food Safety Law do not constitute a crime according to the types of administrative detention and penalty specified in the Legal Liability section of the law, the personal freedom of people involved in the violations will be restrained for a short period of time by the public security authority. In order to effectively implement the new legal requirements and maintain a good order of food safety, it is necessary to construct perfect and detailed procedural norms.

The optimization of culture temperature, initial medium pH, and carbon and nitrogen sources for improved production of extracellular polysaccharides by Lactobacillus plantarum XN1904E was carried out using one-factor-at-a-time (OFAT) and orthogonal array design methods. The results showed that the optimal culture conditions were determined as follows: initial pH 6.5, temperature 37 ℃, galactose as the best carbon source, and fish peptone as the best nitrogen source. Under these conditions, the production of extracellular polysaccharide was 235.41 mg/L. The polysaccharide at 0.2 mg/mL had antioxidant activity in terms of scavenging rate (27.54%) against 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical.

Infant formula milk powder is a main food for infants. Its product quality and nutritive value have drawn much attention from the public. This paper interprets the Provisions for Formula Registration of Infant Formula Milk Powder issued by the China Food and Drug Administration (CFDA) in 2016, and illustrates its background, main contents, characteristics, existing problems, etc.