Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Effect on Microbial Growth and Activity
Bacteria require higher aw for growth than fungi. Gram-negative bacteria have higher requirements than gram positives. Most spoilage bacteria do not grow below aw 0.91, while spoilage molds can grow as low as 0.80. Food-poisoning bacteria like Staphylococcus aureus can grow at aw as low as 0.86, while Clostridium botulinum does not grow below 0.94. Yeasts and molds can grow over a wider aw range than bacteria. The lowest aw values for bacteria is 0.75 for halophilic bacteria, while xerophilic molds and osmophilic yeasts can grow at aw values of 0.65 and 0.60, respectively. The limiting value of water activity for the growth of microorganisms is about 0.6 and below this value the spoilage of foods is not due to microorganisms but may be due to insect damage or chemical reaction such as oxidation. At a water activity of 0.6, corresponding to a water potential of -68MPa (Mega Pascals), the cytoplasm would need to contain very high concentrations of an appropriate compatible solute and it is probable that the macromolecules such as DNA would no longer function properly and active growth may stop.
PHYLUM ARTHROPODA Definition and Introduction Bilateral and protostomial eucoelomate eumetazoa with metamerically segmented and each segment bearing a pair of join
Spermiogenesis - Spermatogenesis At the end of the meiosis the spermatids appear as simple spherical cells with a centrally located nucleus. Their differentiation into sperm r
Explain Pulmonary Atresia With Intact Ventricular Septum ? The direct communications between RV and PA is absent. The PDA is major source of blood flow to lungs From Aorta. The
Q. Symptoms of malabsorption syndrome? The most common symptoms are weakness, lassitude and marked weight loss. Steatorrhoea (excess fat in stools), anaemia and chronic ill h
Pupillary reflexes There are two types of reflexes which control the pupillary reaction-the light reflex and near reflex. When light is shown on one eye, there is a constrictio
You need to prepare 500 ml of a solution containing 10 mM Tris, 0.15 M NaCl and 1 mg/ml SDS. At your work disposal are stock solutions containing 1 M Tris, 2.5M NaCl and 10% (w/v)
what are inorganic species
What are the antigens and the respective antibodies of the ABO blood group system? The ABO blood system contain the erythrocytic antigens A and B that can be attacked by the an
Homologous structures are the body parts in different organisms which have similar bones and similar arrangements of the blood vessels, muscles, and nerves and go through similar
Q. Describe the complex spatial patterns of biodiversity? To describe the complex spatial patterns of biodiversity, ecologists and biogeographers have found it useful to expres
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd