What do you really think about silver nanoparticles? Are they safe to use them in food and food packaging? Or toxic to human?

More Fadwa Waleed Abdulqahar's questions See All

I have two profiles in research gate with the same name Fadwa Abd El Reheem. How can I join both together to one profile?

One with my previous position as Lecturer of Clinical Pathology in Fayoum University and the other with my current position as Associate Professor of Clinical Pathology in Fayoum University.

13 February 2024 3,713 1 View

How to analyze Total fats from grains?

I have a method using AOAC method to test dried fruits, vegetables and herbs for Total fats but it doesn't work for grains, such as oats, quinoa, breakfast cereal, etc. I get about half less than...

25 April 2022 287 16 View

Which is the best nano-encapsulation technique to cover the bitter taste of the bio-active compounds?

I tried to cover the bitterness of the bioactive compounds of a medicinal plant by encapsulating them using the nanophytosome technique putting them in a sweet food product, but it did not work.....

30 December 2021 5,590 10 View

Which temperature is suitable for the micro-metering valve (separation valve) to extract terpenoids using supercritical CO2 extractor?

I extracted a plant rich in terpenoids with Supercritical CO2 (without any co-solvent) in the condition: ( vessel temperature=50 C, seperation temperature- 120 C, and pressure= 200 bar). I did not...

22 July 2021 2,599 2 View

How can I analyze sugars in freeze-dried food using GC-FID?

I need to analyze sugars in freeze-dried food using GC-FID. I don't see any new techniques for this. I see this mainly done by HPLC-ELSD and RID. I've seen old technique whereby pyridine is...

09 June 2021 1,828 5 View

Can we apply CRISPR genome editing on cell line?

We are planing to do CRISPR but we found it is a little hard to do it in hiPSC at a moment. Can we apply it in cell line or not?

10 July 2019 1,950 2 View

Does anyone know how to use OPA as derivatizer for amino acidsif this can't be done on-line on HPLC ?

I have to develop an amino acid method for only one amino acid and I need to derivatize but the HPLC does not have an on-line way to do it. How can I derivatize manually with OPA?

12 March 2018 6,104 4 View

How can I use ( Alibaba )to buy something from china?

Is Alibaba market real? are the prices including shipping? how to make sure that they will ship the goods and they will be in a good quality and manner and will not be late?

16 February 2018 6,908 5 View

Does anyone have papers on extraction of FAMES, omega 3 and omega 6 from seeds and herbs using a GC/MS or FID?

Does anyone have papers on extraction of FAMES, omega 3 and omega 6 from seeds and herbs? I have to do this with a GC/MS or FID.

12 October 2017 7,252 2 View

Urgent question : How I can keep Bax active ?

I want to keep Bax ( pro apoptotic member) continuously active in mouse model. Can any one suggests me a method of that? Thanks

05 May 2016 5,153 2 View

Hello researchers Is this a random laser or just fluorescence?

I am using Rhodamine6G as gain medium and silver nanoparticles as scatterers on a microscope slide and laser input 532 nm comes from above.

09 August 2024 9,894 2 View

How do I conformally do PR spin coating on trench structure?

I did PR spin coating on trench structure. I used AZ P4620 PR and the thickness or PR is around 11um. The substrate is Si. And my trench structure depth is 141um(negative way). Even though I...

08 August 2024 2,298 0 View

How to prepare the nanoparticle treated fungal sample for Environmental SEM analysis?

A fungal strain was treated with nanoparticles. We want to do an environmental SEM analysis. So could anyone share your views on preparing the sample? Thank you.

07 August 2024 5,307 1 View

Binder for ZnO nanoparticles in graphite paste electrode?

I have been using paraffin, but the deposited ZnO still detach from electrode. What is the best binder to modify graphite paste electrode with ZnO nanoparticles?

03 August 2024 4,624 3 View

Can i quantify a nanoparticle encapsulated in cell culture medium by hplc?

Hello, if you made a transwell assay where you incubate the cells with a nanoparticle-encapsulated drug and considering that in the oposite compartment you'll have both the free and encapsulte...

03 August 2024 2,730 1 View

How can I find access to heavy metal reference doses from the EPA and WHO websites?

Reference dose and Maximum acceptable concentrations HMs

03 August 2024 8,230 4 View

Does atmosphere affect flow of matter & energy on Earth & flow of energy in biosphere related to the flow of food through a food chain?

How does the atmosphere affect the flow of matter and energy on Earth and flow of energy in the biosphere related to the flow of food through a food chain?

02 August 2024 9,644 0 View

How to convert g/kg Humic acid dose to kg/ha?

I used humic acid at 0.044 g/kg soil in my pot experiment. But finally, I have to recommend kg/ha. Each pot's soil weight was 11 kg. What is the solution?

02 August 2024 7,186 6 View

Mossbauer spectroscopy Co0.6Mn0.4Fe2O4 MNPs?

Following curve related to Co0.6Mn0.4Fe2O4 Magnetic nanoparticles with extra phase a-Fe2O3. I will appreciate to help me to interpretation this spectroscopy, especially the blue line.

31 July 2024 9,140 2 View

Issues with Protein Expression in Transfected cells?

Hello I am trying to create a stable cell line in HEK293 via Lipofectamine 3000 transfection. My plasmid is a CD63-IL10-GFP construct with Puromycin resistance. I am successful with the...

30 July 2024 6,648 1 View

Abdel Moneim Elhadi Sulieman

Siver nano-particles are advantageous when used in food packaging since it can confer noteworthy boundary properties, as well as mechanical, optical, catalytic, and antimicrobial properties, thereby extending the shelf life and freshness of the packed products.

Amani Sawalha

Please see the attached review paper about the use of silver nanoparticles in food packaging and approval for their application by the food and drug administration.

Hope this will help you.

Mohamed Morsy

I agree with Prof. Abdel Moneim Elhadi Sulieman