How relevant is Mini slump cone?

for all the rheology researchers, my question is, how relevant is a mini slump cone (smaller than a standard 50 cent rheometer). currently based on testing, the thickness of slumped material is...

26 February 2021 3,668 1 View

Can anyone help with an Accurate Diffuser Expansion Loss formula for rectangular shaped diffusers in turbulent flow regime?

I have tried Idelchik's Handbook of Hydraulic Resistance 4th Edition (2007 page 300) formulas and across some range the formulas are reported valid for, the law of conservation of energy is...

20 February 2021 2,504 1 View

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In a physiology textbook treatment of reproduction, they describe the Corpus Luteum as yellow as a result of the color of cholesterol. Yet, pure cholesterol is white, and has no structures that...

15 November 2020 7,398 3 View

Anyone written or used code to do numerical integration of borehole curves?

Just learning Matlab and know a little Python. I have some borehole curves, trace element data in ppm and I want to estimate the volume of of the element over a depth interval using numerical...

28 March 2020 9,572 3 View

Viral load hand washing: why not twice instead of once for 20 sec?

Why isn't washing twice a recommendation? When you do an extraction, say of lipid fractions into organic solvent, or really any separation, the increase multiple times is far more effective than...

18 March 2020 5,600 3 View

In which salt's 0.5 Molar aqueous solution at 35 degrees Celsius would Ammonia gas at 1.4MPa have the least solubility? NH3 Molality at 14 or below?

Looking for the salt with the greatest ability to effect the release of Ammonia gas from aqueous ammonia at a pressure of about 1.4MPa (i.e. salt not precipitating out of solution) and at a...

23 February 2020 4,530 3 View

What is the best statistical method to use for analyzing a questionnaire given multiple times?

For clarification, I am doing research on asynchronous mathematics video collaboration between students of different countries. In order to measure this, I designed a 20-some question survey using...

28 January 2020 3,605 3 View

How to find correlation between likert scale and categorical variables?

I am doing a survey regarding people's awareness on fire safety. In Part I, I gather information like gender (2 categories), education levels (5 categories) etc. In Part II, I set 9 questions...

29 December 2019 4,308 3 View

Any methods to make activated carbon and sand into a non-segregating mixture?

just wondering if there are any potential methods to make activated carbon (either granular or powdered) and sand into a non-segregating mixture? open to suggestions.

25 September 2019 284 3 View

Scheduling algorithm for mult-users tasks in a fog / cloud environment?

We consider a 5G architecture consisting of 3 layers: the cloud layer, fog layer and an edge layer (user layer). Our goal is to set up a scheduling algorithm that involves joint processing of...

02 May 2019 1,366 3 View

Polymer composites suddenly solidifies?

I am making polymer composite by solvent mixing method. When I am trying to add filler solution in polymer solution it quickly get solidified. How to make them then uinform? It doesn't give time...

03 March 2021 7,540 4 View

How the parameters (such as Mw, Chemical bonds, polymer bland and so on) affect the mechanic property of polymer (such as storage, loss modulus) ?

Anyone can recommend any books on such topics? Thanks in advance.

02 March 2021 8,457 2 View

How do I determine the degree of polymerization of PEG 400 based on NMR integration?

Hello, I am working on the photocatalytic degradation of PEG 400. I would like to know if it's possible to determine the degree on polymerization based on NMR integration, or by the MW of the...

02 March 2021 6,186 3 View

How to polymerize TEOS?

I want to polymerize TEOS on a surface. I know that NH4OH is a preferred catalyst and an alcoholic solvent should be used .But I can not find certain amounts of each material to use. Does any one...

02 March 2021 1,404 6 View

Precipitate after adding laemmli buffer to protein solution containing Potassium Acetate?

Hi, I am running a size exclusion chromatography experiment with a buffer containing Potassium Acetate as a salt. I analyse these fractions through SDS-PAGE. After boiling my SEC fractions in...

01 March 2021 2,622 3 View

Can polymer concentrations be calculated based on the number average molecular weight?

Hello, I spin-cast two different polymers onto wafers and measure their height as a function of initial concentration. For polymer A, I have the weight-average molecular weight (Mw) as well as...

28 February 2021 7,882 2 View

POlymer+DMSO solution and moisture??

What could be the reason of moisture at the sides of Vial when I am preparing my polmyer+DMSO solution for membrane fabrication? What etiquettes I am possibly missing here?

28 February 2021 6,516 5 View

How to reduce residual stresses in MD simulation?

I am working on a preparation of representative polymeric structures of some popular polymers, such as polyimide or PTFE for MD simulation, during which a single nitrogen or oxygen atom will be...

24 February 2021 8,105 3 View

How to identify what type of fillers are in a polymer?

Hello everyone, I have some PHAs blended with fillers and nucleating agents, yet I don't know what kind of fillers or nucleating agents. The producer has shut down and there's no way to get in...

24 February 2021 1,356 8 View

How can I selectively dry etch Ti on a polymer substrate?

24 February 2021 5,378 1 View