What is the difference between nanofiltration and reverse osmosis membranes?

06 July 2016 6,572 3 View

Your help will be highly appreciated for solving the problem in the attached file ?

This is to determine the inverse of a Laplace transform

06 July 2016 3,415 0 View

What are the causes of climate changes?

In the history of the Earth, climates have evolved depending on natural phenomena more or less cyclical. What do you think ?

06 July 2016 673 7 View

Does Life exist in polluted water?

Pollution of an aquatic system is characterized by the change in the initial population structure

06 July 2016 10,007 5 View

What are the "ecological disaster" caused by man?

These are triggered abruptly imbalances in the natural environment, large-scale, with serious consequences in the short and long term on the environment.

06 July 2016 8,253 6 View

What is the most appropriate disinfection process to inactivate or destroy pathogenic microorganisms in water systems?

06 July 2016 3,451 4 View

How long can we keep spring water at room temperature without any danger?

Lifetime of spring water

06 July 2016 8,205 6 View

The current desert areas, have they always been?

Can we make a connection with climate change?

06 July 2016 7,697 3 View

Is the drinking water (Tap) more ecological than mineral water?

Comparing drinking water to mineral water is not a new idea, but so far there have been few studies to directly compare drinking water and mineral water by taking into account all factors primary...

06 July 2016 8,462 26 View

Is life possible without water?

there are life forms slowed and dried such as seeds or spores.

06 July 2016 4,192 3 View

Looking for Materials with high thermal expansion coefficient and high temperature resistance?

03 March 2021 8,272 1 View

What is the characteristic length to determine the Reynolds number for the scattered turbulent fluid flow?

Dear all, I just saw this example in FB on the difference between laminar flow and turbulent flow. The flow from a pipe hits the sink and scattered. The flow from the pipe is characterized as...

02 March 2021 1,999 5 View

How to grow E.coli on the low salt LB agar plate with 50 or 100ug/ml of Blasticidin?

Hello, I would like to ask how to grow E.coli which resists 50 or 100ug/ml of Blasticidin. I have tried many methods by using low salt Luria-Bertain(LB) agar plate. However, no colonies grow. Let...

01 March 2021 2,027 2 View

Issues with Permeabilization during Flow Cytometry?

Hello Everyone. Currently I am working to characterize macrophages in the myocardium after ischemia-reperfusion injury in rats. Due to the low total cell number isolated from rat hearts I can...

01 March 2021 3,867 3 View

Why do the air flow results vary totally when adding scalar in CFD ?

Dear All, We are using Autodesk cfd to calculate the air flow in a single sided naturally ventilated room, where air flow depends only on buoyancy due to temperature difference between inside and...

25 February 2021 9,602 4 View

Unknown debris sheets observed in cell culture flasks?

Hi, We culture neural progenitor cells in T175 culture flasks coated with PLO-Laminin. We have successfully grown these cells with our protocol for months. Recently, we observed large sheets...

25 February 2021 3,443 4 View

Are there lab markers/pens resistant to Roti-Histol?

Hi, I'm looking for a pen/marker to write on the smooth, transparent (non-frosted) part of microscopy slides which does not get washed away by alcohols and most importantly Roti-Histol. I want to...

24 February 2021 9,902 5 View

I have a problem with kanamycin - why the kanamycin doesn't affect?

Hi everyone, I need to expression of GFP with pET28 plasmid in E. coli BL21(DE3) plysE. Transformed cells have kanamycin and chloramphenicol resistance. Normally, only transformed cells should...

22 February 2021 4,032 4 View

How does elongation affect the resistance of an electrode?

What are the testing rate for electrodes recommended by ASTM for cochlear implants. I am currently doing the 15mm/min elongatio testing.

22 February 2021 1,515 1 View

Why anti-CD20 or other antibodies are not used to label target cells in flow cytometry t-cell cytotoxicity assay?

New to the field of cell therapy. Why fluorescent-labeled antibodies to target cell antigens are not used for determining target cell count by flow cytometry in cytotoxicity assay (eg car-t)? Cell...

21 February 2021 3,278 3 View