Omar Farhan Ammar

11 Questions 23 Answers 0 Followers

Questions related from Omar Farhan Ammar

Any evidence showing human eggs undergo stress in vitro?

Well, we read a lot about how in vitro manipulation of oocytes can induce stress and therefore reduce their potential or as people call it "quality". I've been looking into the studies mostly,...

05 May 2018 1,250 3 View

What is the best solvent to disperse zincoxide nanopartices for antibacterial activity?

DMSO or deionized water?

03 March 2017 5,187 2 View

Any fast method to fix bacteria for Atomic Force Microscopy analysis?

I want to preserve the morphological features of the bacteria for AFM analysis and I need a fast method for the fixation! Alcohol make some detachments in the bacterial proteins!! And...

03 March 2017 6,417 4 View

How we can stabilize and increase the zeta potential of bio-synthesized silver nanoparticles?

my samples agglomerates and show low zeta potential after a week from the synthesis? I use 50 ml of 1mM AgnO3 + 5 ml of bacterial supernatant ( PH adjusted to 9)

01 January 2017 7,972 14 View

By which mean I can increase the temperature of the AgNO3, bacterial supernatant mixture?

I do not have microwave reactor (100W 2.45 GHz ) in the lab. So, any alternatives please?

12 December 2016 8,180 2 View

What are the most actual issues in the teaching process of middle east universities?

specially for graduate programs.

03 March 2016 8,964 0 View

What do you think about MBEC assay as a method for susceptibility testing of biofilms?

Any further techniques you recommend?

02 February 2016 6,921 2 View

How to make a ready use kit for measuring a new protein found in the serum in mg/dl levels from A to Z?

My professor asked me this question and we had a long discussion about it, any Ideas? I'm thinking about how to separate and purify the protein from the serum, then make monoclonal antibodies...

01 January 2016 1,173 1 View

After synthesis of silver nanoparticles how to concentrate and wash your colloida SNPs?

How I can concentrate my particles and wash them for further testing like for TEM and EDX?

01 January 1970 4,070 4 View

What is the best concentration and volume of PVP to use it as a capping agent in silver nanoparticles biosynthesis?

My reaction consist of 50ml of 1mM AgNO3 mixed with 10 ml of the bacterial supernatant, now I want to add PVP to prevent agglomeration and increase the zeta potential.

01 January 1970 7,326 5 View

Why my bio-synthesized colloidal silver nanoparticles do not show any antibacterial activity?

I have synthesized silver nanoparticles by using bacterial extracellular components as the reducing agent. After confirming the presence of AgNPs in our samples I'v tested the resulted colloid in...

01 January 1970 606 9 View