Factors affecting microbial growth. INFLUENCING THE GROWTH OF Factors that Influence Microbial Growth ability to participate in chemical/biochemical reactions, and its availability to facilitate growth of microorganisms. pH measures how acidic or basic (alkaline) a solution is, and microbes may grow in either acidic, basic, or neutral pH conditions. Factors affecting Microbial growth Physical factors •pH •Temperature •Osmotic pressure •Hydrostatic pressure •Moisture pH and buffering capacity . The factors are: 1. Factors Affecting. We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. glucose) for building blocks. There are a variety of environmental factors that affect microbial growth. … glucose) for building blocks. Soil Microorganisms: key factors affect distribution, activity and population Authors: Rajendra Kumar Yadav and Malu Ram Yadav, Mahendra Kumar Yadav PhD. See our Privacy Policy and User Agreement for details. •The requirements for microbial growth can be divided into two main categories: physical and nutritional. Oxygen requirement. Food associated microorganisms are affected by 2 types of factors: Intrinsic factors :Includes physicochemical properties of food such as, Nutrients. Factors Affecting Microbial Growth Control of Microbial Growth: Introduction Early Most foods contain sufficient nutrients to support microbial growth. When microorganisms grow in food, they cause varying degrees of change in the food's characteristics as a result of metabolic activity. Growth Factors • Some microbes have the enzymes and biochemical pathways needed to synthesize all cellular components using minerals and sources of energy, carbon, nitrogen, phosphorus and sulfur. We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. Food. The chemicals are very important for microorganisms as these provide nutrition for growth, activity and survival of microorganisms in ecologically deficient niches in soil. Nutrients needed by microorganisms include: Carbon carbon containing compounds are needed as an energy source (ex. Several factors encourage, prevent, or limit the growth of microorganisms in foods, the most important are a. w, pH, and temperature. Microbial Growth FATTOM Food Acid Temperature Time Oxygen Moisture Factors Affecting Microbial Growth. Intrinsic parameter: Inherent or natural characteristics of food that affects growth of microbes in it are called intrinsic parameter of food. The chemical factors are gases, acids, micro- and macro-elements, clay minerals, etc. Department of Biotechnology Bacteria grow only in the presence of oxygen, called: strict aerobes. View Lecture Slides - 6-16 Factors_Affecting_Microbial_growth.ppt from BIO 150 at Wichita State University. Antimicrobial constituents Microorganisms also prefer a certain pH level in the substance or environment in which they grow--that is, they prefer to have particular acidic qualities in their surroundings. B.Sc. Guided by: 5 (factors affecting microbial growth), Lecture 3 intrinsic and extrinsic factors, No public clipboards found for this slide. Dr. Ruchi Seth Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. It can be : Essential – when growth does not occur in their absence. If so, share your PPT presentation slides online with PowerShow.com. Factors Affecting Microbial Growth Food. Temperature Theoretically, bacteria can grow at all temperatures between the freezing point of water and the temperature at which protein or protoplasm coagulates. Most spoilage bacteria grow best near neutral pH Pathogenic bacteria even more narrow in tolerance range of near neutral Yeast and moulds have much greater tolerance to acidic (lower) pH ; 4 Factors affecting Microbial growth Physical factors •pH •Temperature •Osmotic pressure •Hydrostatic pressure •Moisture •Radiation •Oxygen concentration Nutritional factors … Factors affecting microbial growth in foods. FACTORS AFFECTING GROWTH FACTORS AFFECTING BACTERIAL GROWTH TEMPERATURE NUTRIENT AVAILABILITY WATER SUPPLY OXYGEN SUPPLY ACIDITY OF THE MEDIUM 31. You can change your ad preferences anytime. Factors Affecting The Growth Of Microbes. Factors affecting the growth of M.O divided to A) Intrinsic factors Factors inherent to food itself 1-Water activity 2- pH 3- Oxidation reduction potential 4- Nutrient content 5- Antimicrobial constituents 6-Biological structure Factor Of Relative Humidity. Temperature 2. MICROORGANISMS Temperature. •The microbial growth is the increase in number of cells rather than in size of individual cells. Factors on Growth • Most organisms grow in fairly moderate environmental conditions • Extremophiles –grow under harsh conditions that would kill most other organisms . Factor acting deadly on INTRINSIC FACTORS : OXIDATION- REDUCTION POTENTIAL OR REDOX POTENTIAL The growth of microorganisms in food differs if the growth medium will act as electron donor or electron receptor. Nitrogen needed for amino acids and nucleotides; some can synthesize … The PowerPoint PPT presentation: "Factors affecting microbial growth" is the property of its rightful owner. Prachi Gupta Growth of microorganisms in food is dependent on various parameters. As the following section shows, growth may be profoundly affected by a number of physical factors. Factors affecting the growth of microorganisms. Temperature Vary in their temperature requirements. 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