As a process, food fermentation dates back at least 6000 years and is likely to be derived from microbial interactions of an appropriate nature. Fermentation has allowed our ancestors to survive the winter season in t...As a process, food fermentation dates back at least 6000 years and is likely to be derived from microbial interactions of an appropriate nature. Fermentation has allowed our ancestors to survive the winter season in temperate and cooler regions and those in the tropics to survive the periods of drought by improving food shelf-life and safety. Traditional fermentation process is still used as a replacement where there is no refrigeration or other means available for food storage. In general, fermented foods can be defined as foods produced through controlled microbial growth and the conversion of food components through enzymatic actions. They are generally appreciated for characteristics such as pleasant taste, aroma, texture and improved cooking and processing properties. Microorganisms contribute to the development of characteristic properties such as taste, smell, visual appearance, texture, shelf-life and protection by virtue of their metabolic activities. Enzymes indigenous to the raw materials may play a role in enhancing these characteristics. The use of starter cultures is a hallmark of industrial food fermentation and their introduction has been followed by a continuous search to improve them. Examples of desired properties in starter cultures include robustness during manufacturing, fast growth, high biomass yield and product yield and specific organoleptic properties. Quality, safety and acceptability of traditional fermented foods may be significantly improved through the use of starter cultures selected on the basis of multifunctional considerations, also taking into account the probiotic concept and possibilities offered for improved health benefits. Focused studies toward the introduction of starter cultures for small-scale fermentations seem more than justified, and in fact, deserve the highest priority.展开更多
对山西地区传统面食发酵剂中酵母菌进行筛选分离及初步鉴定,考察酵母的发酵力、耐酒精能力、耐酸性及抗冻性等指标。结果表明:两株酵母菌分别为萨地假丝酵母(编号Q3505)和卡斯特酒香酵母(编号Q5503)。其中菌株Q5503发酵3 h面团体积可达4...对山西地区传统面食发酵剂中酵母菌进行筛选分离及初步鉴定,考察酵母的发酵力、耐酒精能力、耐酸性及抗冻性等指标。结果表明:两株酵母菌分别为萨地假丝酵母(编号Q3505)和卡斯特酒香酵母(编号Q5503)。其中菌株Q5503发酵3 h面团体积可达410 m L,产气490 m L。菌株Q3505发酵3 h面团体积可达395m L,产气270 m L。在耐酸性和耐酒精能力上,菌株Q5503优于Q3505;在抗冻性方面,冷冻60 d后的菌株Q5503和Q3505发酵力保持率分别为83.33%和64.39%,表现出较好的抗冷冻性,具有一定的工业应用前景。展开更多
文摘As a process, food fermentation dates back at least 6000 years and is likely to be derived from microbial interactions of an appropriate nature. Fermentation has allowed our ancestors to survive the winter season in temperate and cooler regions and those in the tropics to survive the periods of drought by improving food shelf-life and safety. Traditional fermentation process is still used as a replacement where there is no refrigeration or other means available for food storage. In general, fermented foods can be defined as foods produced through controlled microbial growth and the conversion of food components through enzymatic actions. They are generally appreciated for characteristics such as pleasant taste, aroma, texture and improved cooking and processing properties. Microorganisms contribute to the development of characteristic properties such as taste, smell, visual appearance, texture, shelf-life and protection by virtue of their metabolic activities. Enzymes indigenous to the raw materials may play a role in enhancing these characteristics. The use of starter cultures is a hallmark of industrial food fermentation and their introduction has been followed by a continuous search to improve them. Examples of desired properties in starter cultures include robustness during manufacturing, fast growth, high biomass yield and product yield and specific organoleptic properties. Quality, safety and acceptability of traditional fermented foods may be significantly improved through the use of starter cultures selected on the basis of multifunctional considerations, also taking into account the probiotic concept and possibilities offered for improved health benefits. Focused studies toward the introduction of starter cultures for small-scale fermentations seem more than justified, and in fact, deserve the highest priority.
文摘对山西地区传统面食发酵剂中酵母菌进行筛选分离及初步鉴定,考察酵母的发酵力、耐酒精能力、耐酸性及抗冻性等指标。结果表明:两株酵母菌分别为萨地假丝酵母(编号Q3505)和卡斯特酒香酵母(编号Q5503)。其中菌株Q5503发酵3 h面团体积可达410 m L,产气490 m L。菌株Q3505发酵3 h面团体积可达395m L,产气270 m L。在耐酸性和耐酒精能力上,菌株Q5503优于Q3505;在抗冻性方面,冷冻60 d后的菌株Q5503和Q3505发酵力保持率分别为83.33%和64.39%,表现出较好的抗冷冻性,具有一定的工业应用前景。
