Single cell protein excretion, and so uric acid can build up in the blood and may deposit as crystals in the joints, causing gout and arthritis. Thus, SCP used as food is usually processed to reduce he RNA content. Pag guidelines recommend that for humans the daily intake of nucleic acid should not be more than 4g, of which not more that 2 g should be obtained from sCP If SCP has a nucleic acid content of 15%, how much of that sCP could be safely commended human daily requirement (of 70 gprotein) does this represent ingested per day? If the SCP contains 50% protein, what proportion of th Our calculation 2g nucleic acid would be present in +100 581338C At 50% protein this represents 13.3 x 100=6.65 g protein This corresponds too.65 x 100=9.5 of the daily requirement. SAQ 4.1 Which of the following factors supports the use of micro-organisms rather than higher plants for the production of protein food? 1) Plants are more difficult to digest than micro-organisms 2) Micro-organisms can be used to convert organic wastes into proteins 3) Micro-organisms grow more quickly than plants gher plants need CO as a carbon source ) Micro-organisms can use inorganic nitrogen SAQ 4.2 Suggest ways of overcoming or bypassing the following disadvantages of CPAs 1) Unpalatability 2) Indigestibility 3) Poor amino acid profile 4) Toxicity We have seen that only certain micro-organisms that conform to nutritional and safety requirements are suitable for food or feed, and that food has more strict requirements than feed. In addition for use as food, SCP should have a reduced nucleic acid content and should be palatable. Most often this means that its use is limited to processed foods, in which food technologists can produce acceptable tastes, smells and textureSingle cell protein 6!5 excretion, and so uric acid can build up in the blood and may deposit as crystals in the pints, causing gout and arthritis. Thus, SCP used as food is usually processed to reduce the RNA content. PAG guidelines recommend that for humans the daily intake of nucleic add should not be more than 4g, of which not more that 2 g should be obtained from SCP. If SCP has a nucleic acid content of 1596, how much of that s8 could be safely ingested per day? If the SCP contains 50% protein, what proportion of the mommended human daily requirement (of 70 g protein) does this represent? Try to work these out for yourself before reading our answers. n Our calculation: 29 nucleic acid would be present in 2 x 15 g =13.3 g SCP At 50% protein this represents 13.3 x 100 = 6.65 g protein This corresponds to - x 100 = 9.5 76 of the daily requirement. 100 50 6.65 70 Which of the following factors supports the use of micro-organisms rather than higher plants for the production of protein food? 1) 2) 3) 4) 5) Plants are more difficult to digest than micro-organisms. Micro-organisms can be used to convert organic wastes into proteins. Micmrganisms grow more quickly than plants. Higher plants need CG as a carbon source. Micmrganisms can use inorganic nitrogen. Suggest ways of overcoming or bypassing the following disadvantages of SCP as food. 1) Unpalatability 2) Indigestibility 3) Poor amino acid profile 4) Toxicity We have seen that only certain micro-organisms that conform to nutritional and safety requirements are suitable for food or feed, and that food has more strict requirements than feed. In addition, for use as food, SCP should have a reduced nucleic acid content and should be palatable. Most often this means that its use is limited to processed foods, in which food technologists can produce acceptable tastes, smells and textures