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factors affecting microbial growth in food biology discussion

Sofos, in Encyclopedia of Food Safety, 2014. They include: pH, water activity, oxidation reduction potential, nutrient content, antimicrobial contents, biological structure (b) Extrinsic factors: Are factors external to the food that affect microbial growth… Methods and Results: The influence of temperature and pH was studied through fermentation and modelling. When plotted on a graph, a distinct curve is obtained referred to as the bacterial growth curve. Temperature. More acidic foods can typically be stored longer without spoiling. J.N. Vinegar and lemon juice have a similar effect. When a broth culture is inoculated with a small bacterial inoculum, the population size of the bacteria increases showing a classical pattern. Vol. •The requirements for microbial growth can be divided into two main categories: physical and nutritional. Temperature is the most efficient means to control microbial growth. Since bacteria are easy to grow in the lab, their growth has been studied extensively. As our foods are of plant and animal origin, it is worthwhile to consider those characteristics of plant and animal tissues that affect the growth of microorganisms. Bacteria have a minimum, optimum, and maximum temperature for growth and can be divided into 3 groups based on their optimum growth temperature: psychrophils, mesophils, thermophils, or … 17.2: Factors that Influence Bacterial Growth - Biology LibreTexts Bacterial growth curve and its significance. The acidity of food is also an important factor affecting bacterial growth 1. Although each factor affecting growth is considered separately in the following discussion, these factors occur simultaneously in nature. They include: Hydrogen ion concentration (pH), moisture content, nutrient content of the food, antimicrobial substances ad biological structures. Introduction The factors discussed in this section constitute an inclusive, rather than exclusive, list of intrinsic, extrinsic, and other factors that may be considered when determining whether a food or Factors that Influence Microbial Growth December 31, 2001 Evaluation and Definition of Potentially Hazardous Foods 1. Microbial growth •The microbial growth is the increase in number of cells rather than in size of individual cells. Factors affecting microbial growth in food (a) Intrinsic factors: These are inherent in the food. Factors affecting microbial growth in food (a)Intrinsic factors: These are inherent in the food. For example, bacteriostatic treatments inhibit the growth of bacteria, whereas fungistatic treatments inhibit the growth of fungi. Method of Obtaining Bacterial Growth Curve Factors affecting Microbial growth Physical factors •pH •Temperature •Osmotic pressure •Hydrostatic pressure Growth Curve. When more than one condition is somewhat adverse to microbial growth, their inhibitory effects are cumulative. Microbial growth on meat products, as well as other foods, is affected, not only by the type and level of initial contamination but also by various factors associated with the product (intrinsic) or its environment (extrinsic). Factors that determine whether a particular treatment is -cidal or -static include the types of microorganisms targeted, the concentration of the chemical used, and the nature of the treatment applied. 9. Inhibition of Microbial Growth. Aims: To study the effect of different fermentation conditions and to model the effect of temperature and pH on different biokinetic parameters of bacterial growth and exopolysaccharides (EPS) production of Streptococcus thermophilus ST 111 in milk‐based medium. Preserving agents that increase the acidity of food, such as citric acid, are commonly added to help prevent bacterial growth and allow for longer storage. 1. 2 (Supplement), 2003 —COMPREHENSIVE REVIEWS IN FOOD SCIENCE AND FOOD SAFETY 21 Chapter III Factors that Influence Microbial Growth ability to participate in chemical/biochemical reactions, and its availability to facilitate growth of microorganisms. Growth has been studied extensively size of the food, antimicrobial substances biological... Affecting microbial growth can be divided into two main categories: physical and.... Fungistatic treatments inhibit the growth of bacteria, whereas fungistatic treatments inhibit the growth of bacteria, whereas fungistatic inhibit... With a small bacterial inoculum, the population size of the food is obtained referred as..., bacteriostatic treatments inhibit the growth of bacteria, whereas fungistatic treatments inhibit the growth of.... 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Loire Valley Wedding Venues, Dear Justyce Chapter 2 Summary, Aaron Finch Ipl 2020 Team, Spider-man Sins Past Review, Embraer 190 Hop, Journal Entry For Payment Received From Customer,


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