What are the typical values for Mass transfer k in concentration polarization in reverse osmosis Desalination ?

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What is the best way to spot phosvitin stability, extracted from egg yolk, after heat treatment?

For protein extraction i found a protocol that separate phosvitin from egg yolk using ultrafiltration trough 10 MWCO then uses the filtrate. But phosvitin molecular weight is 35 KDa. So how it is...

16 April 2023 4,309 2 View

Can we consider SEM (Scaning Electron Microscope) technique as a useful one to visualise fouling layers on reverse osmosis membranes ?

I'm trying to visualise fouling layers (biofouling, organic, inorganic and colloidal) on reverse osmosis membranes. Do you think SEM technique is a practical one? are there better...

10 November 2019 6,718 4 View

What are the best practical techniques to monitor fouling in reverse osmosis desalination membranes ?

I need to monitor all kinds of fouling (colloidal, organic, scaling, biofouling) on the reverse osmosis membrane in the desalination process. what are the practical (easy and reliable) techniques...

05 November 2019 3,206 3 View

Can I patent a model used for chemical process based on previous models but with major modifications ?

Is it possible to patent a mathematical (with algorithm ) model used for variables calculation of a chemical process, knowing that there are different models patented for the same chemical process...

05 November 2019 2,871 8 View

What is the effect of cyclic feed concentration on reverse osmosis fouling ?

I'm looking for documentation and papers describing the effect of cyclic feed concentration on membrane fouling. by cyclic concentration, I mean a feed which has a non-constant concentration and...

02 November 2019 7,740 1 View

How to validate a athmatical model in reverse osmosis process ?

i worked on a model to describe a desalination reverse osmosis process. I have all the equations needed and the model is ready. the model depends on five parameters. how many experiments do I need...

27 June 2019 304 3 View

Where can I find the precise values of water and salt permeabilities of DOW RO membranes as a function of feed salinity ?

I need the exact value of water and salt permeabilities of DOW RO membranes for my project. Thank you.

30 March 2019 1,168 0 View

What are the values of water and salt permeabilities in common reverse osmosis membrane for desalination (filmtec membranes for instance) ?

What are the values of water and salt permeabilities in common reverse osmosis membrane for desalination ? (filmtec membranes for instance) I need precise values as much as possible. Thank you.

18 January 2019 5,690 3 View

What is the most used type of commercial membranes in reverse osmosis desalination ?

what is the most used type of commercial membranes in reverse osmosis desalination ? and where can I find data about these membranes (solvent and solute permeability, pH range, max pressure, etc...)

05 January 2019 5,209 5 View

I'm thinking about working on reverse osmosis modelling for my PhD thesis, can you give me any leads or suggestions?

Reverse osmosis modelling

26 December 2017 3,662 1 View

Can you connect an HPLC to a Mass Spec only at a certain time point?

Can anyone explain this method? Especially the last statement where it says only at 1.5 to 2.5mins was the MS/MS connected to the UPLC. How is that possible, is it a feature in this specific...

11 August 2024 8,141 3 View

GC-MS retention index prediticon?

Hello experts, Does anyone know any free software about retention index prediction ?

08 August 2024 7,403 2 View

How to calculate CCS for Sodiated adduct ions and Multiply Charged Ions?

I'm currently working on calculating the collision cross section (CCS) for various ions, and I'm facing challenges when dealing with sodiated and multiply charged ions. Most of the resources I’ve...

08 August 2024 8,329 0 View

How to fix errors in my heat transfer steel structure with reinforced concrete slab model Abaqus?

I have modelled a steel structure using beam elements in Abaqus and attached to this structure reinforced concrete slab. The analysis that I am making is heat transfer of the structure. The...

07 August 2024 1,028 0 View

In the case of a wound l recurrence after radical breast cancer and sentinel lymph node biopsy. Are the sentinel lymph node procedure recommended?

In the case of a wound l recurrence after radical breast cancer and sentinel lymph node biopsy. Are the sentinel lymph node procedure recommended? If no axillary lymph node dissection was not...

05 August 2024 8,056 1 View

Where to find a gene list for CRISPRa/i library screening of regulatory factors that affect pathogenic Th17 differentiation in PBMC?

I want to perform a CRISPRa/i library screening for candidate regulatory factors that affect pathogenic Th17 differentiation in PBMC. But I am wondering how to define the size of gene library, so...

31 July 2024 2,150 0 View

Hello dear researchers. I would like to know what is a normalized mass in an EDX analysis?

EDX analisys

31 July 2024 5,947 2 View

How to find a reaction is reversible or irreversible in CV? How to know the number of electrons transfer?

My screen printed electrode CV is given here. For Nerstean one electron reaction the delta E value should be close to 57 mV and ration of Ic/Ia should be close to 1. I did CV of my screen printed...

30 July 2024 4,671 3 View

What is the reason I get 400nm nanoparticles using an extruder with 200 nm membrane for cell membrane coating?

I am trying to coat my micelles and PLGA based nanoparticles with cell membrane using an Avanti mini extruder according to literature . I use 200nm membrane but my particles end up to be 400nm And...

30 July 2024 3,294 3 View

Gas chromatography RT detection?

I am working on algal extract to which gas chromatography (Not GC-MS) spectrum I want to discover. My question is can we identify specific compounds using retention time if I compared the RT with...

29 July 2024 8,034 4 View