What is the relationship of Corona virus to environmental balance?

More Brahim Abdelkebir's questions See All

What are the limit values of conductivity, pH and hardness of water?

Hello everyone, We have a water treatment unit where the input water is TAP WATER. Tap water pass throw three steps in this order: Softner ==> Filters (cotton filter+charcoal filter) ==>...

02 January 2024 5,900 9 View

How to get a clean foraminifera species to take pictures on SEM?

After several washings of shale samples in search of microfossils, each time we obtained the same results, a species of foraminifera and radiolarians, we followed the standard method, with water,...

17 November 2023 3,037 3 View

How to clean foraminifera species to take a photo in SEM?

After several washings of shale samples in search of microfossils, each time we obtained the same results, a species of foraminifera and radiolarians, we followed the standard method, with water,...

17 November 2023 2,638 1 View

Sustainable management of local products and its role in the development of tourism?

Hi all, I am trying to work on this subject for my Ph-D and I would apreciate if anyone could help me to know who are the most imporant authors that worked on this topic. Even those who worked on...

24 October 2023 8,625 4 View

How can create vegetation map (by species) using GEE?

I have field data for random samples from a specific forest, represented by vegetal surveys, where each vegetal survey contains one, two or three dominant vegetal species with geographic...

02 October 2023 4,291 1 View

Does the % peak area of a GC/MS chromatogram correspond to the mass percentage?

03 September 2023 6,924 5 View

The extracts showing the greatest inhibitory zones by the well diffusion method are not always those with lowest MIC, please explain Why ?

Please needs to explain: The relationship between the great inhibitory zone (in antibacterial activity) and the lowest or greatest MIC, Why? Thanks

15 August 2023 6,688 6 View

Does language of teaching matter for students to follow up their studies in accounting ?

post graduate studies often done in English and most papers are published in English. student all over the world take fondamental programs in their mother language, hen they reach to the reserch...

13 August 2023 3,690 2 View

How can I calculate the amount of polyphenol content?

the volume in the equation refer to the volume of extract needed for the assay (0.1ml) or is it the volume total of my extract (5ml)? also, the concentration of my extract is 50mg/ml so I make a...

21 July 2023 5,445 1 View

How to choose the optimal volume of sample and the solubilizing solvent for GC-MS analysis ?

I should realize a GC-MS analysis for a fixed oil, and to avoid the worse injection volume of both (volume of sample and the solubilizing solvent), I need some guidelines by researchers. Thanks in...

15 May 2022 507 2 View

How can I prepare virus for a TEM or SEM imaging?

I have virus (viral hemorrhagic septicemia virus) in suspension and the experiment will not involve cells. What level of TCID50 is preferred?

11 August 2024 3,115 1 View

Can I detect the FLAG sequence of my AAV vector by qPCR?

I am treating human cells with an AAV vector encoding for my gene of interest tagged by FLAG. I want to quantify the mRNA expression of my gene of interest via qPCR to discriminate the endogenous...

14 July 2024 8,482 3 View

Intracerebroventricular (ICV) AAV inj.?

I'd like to know if anyone has got experience in intracerebroventricular (ICV) AAV inj. I am looking for a concomitant spread of the AAV including but not limited to the motor cortex and the...

12 July 2024 781 0 View

How to improve my plaque assay for influenza virus?

I used MDCK cells for my plaque assay for influenza virus and seeded 950,000cells/well in 6-well two days before infection. The virus was diluted in FBS-free MEM with 0.5ug/ml TPCK-trypsin. Here...

11 July 2024 5,669 5 View

Does anyone know how to improve calcium-imaging fluorescence with GRIN lenses?

Hey everyone, I've been working with GRIN lenses (Inscopix) for almost 1 year and still had no luck seeing strong fluorescence on them. When I look at them, I can see good blood flow and,...

08 July 2024 5,178 2 View

Why do I have two different bands from the same virus after PCR?

I get two different bands from BCMV after PCR

07 July 2024 2,112 1 View

Problems to find a region of a Virus gene?

We have a couple of primers but when we make a blast for those primers we see two results: When I use Blast from NCBI, I found many lineages which anniling with many lineages. But when I want to...

01 July 2024 7,644 3 View

I need this article, can anyone get it?

I need this complete article, could anyone help me? follow theme below. Chikungunya virus cell-to-cell transmission is mediated by intercellular extensions in vitro and in vivo.

20 June 2024 3,373 1 View

Can anybody recognize the virus on potato plants?

Infected potato plant was negative for PVY, PVX, PVM, PVS. What can it be?

19 June 2024 6,739 3 View

Protocol for Antibody Dissociation from Virus in Serum Samples?

Hello everyone, I'm currently working on a project where I need to isolate viruses in culture from incubation with PCR-positive serum samples, but I'm facing the challenge of dissociating...

17 June 2024 1,855 1 View

Nasser Said Gomaa Abdelrasheed

COVID-19 affected the environmental balance