SPOIL - mico growth

10 important questions on SPOIL - mico growth

What is the factor difference between the specific growth rat and growth rate?

Factor 2.3

What is does growth kinetics mean?

Study of increase of cell number in time (growth rate)

What does a kinetic model describe?

Growth kinetics mathematically
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How can we make the shelf life longer?

Decrease inial number of contaminants, decresae growth rate

What is the difference beteen catabolism and anabolism?

Catabolism - metabolic routes that are involes in degradation of a carbon and energy source to geneate precursors for cell components and energy for cell maintenance

anabolism - met routes involved in biosyntesis of polymeric cell compounds (DNA, RNA, protein, lipids, cell wall constituents

What are some examples of antimicrobial barriers?

Shell
peel
fat
skin
---
this causes lack of access to water and nutrients
and UV and dessication is not protection

Differnece betwwen m-o optimal pH

Most foodborne bacteria aboujt 7
yeast about 4.5
mould about 3.5

What's the Henderson-Hasselbalch equation and what is it for?

PH=pka+log(A-/HA)
if ph=pka then A = HA
if ph = pka +1 then A = 10xHA 
A is dissociated acid
HA conc undissociated acid

Whats acicdic preservative?

Acid to lower ph

What is bot cook canning?

Receive stringent cook to inactivate pathogens

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