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Questions related from Nirvana Jaganath
So far I have seen that organic acids are used to kill off spent yeast from the brewing industry before being fed to animals such as pigs. The amount of acid needed to achieve a satisfactory kill...
22 August 2023 1,542 5 View
I need to incubate a large number of agar plates which contain bacteria for aerobic growth. If memory serves me right you should not have more than 8 plates in a single stack. Can someone please...
21 October 2021 3,412 4 View
I have to test a few new antimicrobial compounds against Salmonella and the cross streak assay was suggested to me. I have never heard of this method and the protocols on the internet are...
22 October 2020 3,224 6 View
I am performing a test where the pH of the sample needs to be between pH 6 - 8. I combine 10g of dry sample such as ground maize with 50 ml of 65 % Ethanol. The sample is then mixed and the...
22 October 2019 9,805 2 View
How do I make up a 0.01M Na2HP04/NaH2P04 buffer solution, pH adjusted to 7? Both chemicals that I have on hand are anhydrous. The molecular weight of Na2HP04 is 141.96 g/mol and the molecular...
11 September 2019 5,625 3 View
We often find Salmonella in fish meal (dry sample with around 6 % moisture and 9 % fat) samples but after a while (a week or two) the levels drop so low that we cannot detect it anymore. Is there...
05 June 2019 654 2 View
I am struggling to interpret results from a few carbon dioxide trials I've run. The formulations being tested work as a preservative against yeast and mould. The set up is as such: Untreated...
28 May 2019 950 5 View
How would you test the effectiveness of a preservative added to animal feed? I've had a look at the preservative efficacy test used for pharmaceutical products: where the preservative is added to...
13 September 2018 6,169 4 View
I would like to test certain bacteria, yeast and mould against various liquid anti-microbials using the disk diffusion test. The anti-microbials are made in-house and are thus not available in...
21 August 2018 2,942 15 View
Can someone recommend a bio-assay system? I am looking to test a variety of liquid antimicrobial agents against bacteria and moulds.
16 March 2018 316 7 View
How would you test the efficacy of a dry antimicrobial product (powder form)?. The dry product is applied to dry samples. I am trying to see which dosage works the best so I have to test different...
14 February 2018 746 3 View
