Siti Aishah Mohd Hanim

4 Questions 6 Answers 0 Followers

Questions related from Siti Aishah Mohd Hanim

Why is the zeta potential negative?

Hello researchers, I did a zeta potential analysis on zeolite and silver-exchanged zeolite powder at pH 7. Why is the zeta potential of silver-exchanged zeolite is more negative than the zeolite?...

03 October 2016 5,994 7 View

Can I use a disc diffusion method to determine the antibacterial activity of silver-zeolite?

Zeolite is insoluble in water, thus, can a sterile disc paper immersed in a suspension of silver-zeolite and then be used to determine the antibacterial activity?

16 May 2013 2,569 1 View

Can I use a standard calibration curve with a range of 1 to 10g/L to calculate the concentration of the solution which has a much lower concentration?

From a journal, the standard calibration curve was prepared from a concentration of 1 to 10g/L. In my experiment, the maximum expected concentration of the solution is 0.1 g/L. Would the...

31 March 2013 2,191 5 View

How to get the product (which is a biosurfactant) out of the flask after it was concentrated in a rotary evaporator?

The product will then be frozen dried to obtain the powder form. I have read that it has to be dialysed against distilled water, but I am not so sure.

02 January 2013 2,447 9 View