Sahar Kelvani

8 Questions 26 Answers 0 Followers

Questions related from Sahar Kelvani

How can I calculate the density of oil at very low temperatures?

Hello, have a nice time 🌱 I have the density of an oil at a 15 degrees, and now I want to obtain the density at a temperature of minus 60 (-60). How can I do this? Thank you for your reply

04 August 2023 2,828 1 View

Why does bacteriorhodopsin become colorless in light? In other words, why does bleaching occur?

Greetings and Regards I calculated the bacteriorhodopsin concentration in Halobacterium salinarum as described by Shand and Betlach. But I have a question: why does bacteriorhodopsin lose its...

03 March 2022 2,884 8 View

What is meant by H2O2 (0.1%) and What is the solvent of ferrous sulfate in the hydroxyl Radical Scavenging method?

Hello I want to use the Hydroxyl Radical Scavenging method for a series of antioxidant tests. In the written protocol, I should use iron sulfate, salicylic acid and 0.1% hydrogen peroxide. Does...

21 August 2021 9,673 12 View

Why different volume ratios have been used in different articles for DPPH assay?

Hello I wish you good health I have a question: In different articles, different volumetric ratios have been used for DPPH testing. For example, one paper used 0.5 cc of sample and 2.5 cc of DPPH...

19 August 2021 6,800 14 View

What is Chemical Oxygen Demand (COD) Analysis?

Hello. I want to complete my information on water and wastewater and methods of effluent analysis. What is effluent COD measurement methods?

28 September 2020 2,503 5 View

How to produce bioethanol?

Hello I want to complete my data about production of ethanol from molasses by fed-batch cultivation. Can anyone help me here? Do you know an article about this? Thank you very much.

16 June 2020 7,513 4 View

Is the Bradford method used to estimate soluble proteins or total protein?

Hi I want to know more about the bradford method. Is this method used to determine soluble proteins? Or to determine total proteins? And what are the differences between soluble proteins and...

20 February 2020 2,646 5 View

Hydroxyl Radical Scavenging

Hello In the tests related to Hydroxyl Radical Scavenging, two different methods were used. In some articles, EDTA, deoxyribose, etc. have been used, but in other articles, these two substances...

01 January 1970 142 16 View