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

What are the contents of the supplication of the oppressed that Imam Al-Hadi (peace be upon him) teaches us?

What are the contents of the supplication of the oppressed that Imam Al-Hadi (peace be upon him) teaches us?

08 February 2021 6,791 5 View

How to measure the hardness for PLA & PHAs polymers?

Hello, I am a bit confused on whether to follow ASTM D785 (Standard Test Method for Rockwell Hardness of Plastics and Electrical Insulating Materials) or ASTM D2240 (Standard Test Method for...

21 January 2021 7,487 4 View

How to create suspended particles flow and simulate distribution in a chamber using CAD software?

Allow me first to apologize in advance for the long post. I have tried to keep it right-to-the-point as possible!. Objective To simulate suspension of solid particles using CAD software/create...

12 January 2021 6,389 2 View

How to properly purge an injection molding machine?

Hello, We're trying to purge a mini injection molding machine after not using it for a while now. The resin inside is PHA and can be some PLA left over as well. We've tried using a purging...

08 October 2020 4,659 5 View

Under normal conditions using an ordinary cement, the period of removal of the form work, is ?

A.7 days for beam soffits B.14 days for bottom slabs of spans 4.6 m and more C.21 days for bottom beams over 6 m spans D.2 days for vertical sides of columns E.all the above.

13 July 2020 936 1 View

How is a progressive-collapse analysis performed in which a column is removed to evaluate dynamic response?

How is a progressive-collapse analysis performed in which a column is removed to evaluate dynamic response?

22 June 2020 4,090 2 View

How is vibration analysis done for two machines which rotate at different frequencies?

Extended Question: I would like to perform the periodic time-history analysis of a structure which supports two rotating machines which operate at different frequencies (1911 and 5267RPM, T =...

22 June 2020 8,852 6 View

How much does it cost to publish in a journal?

Article Processing Charge(APC) which means publication fee of articles depends upon the academic publishers who publish the articles. They publish article with two ways. They often charge $100 to...

17 June 2020 8,943 35 View

How we could modeling orthotropic membrane elemnt in SAP2000?

I am trying to model steel plate shear walls in SAP 2000. First I should define an orthotropic steel material and define nonlinear parameter of it ( Stress-Strain curvature) in somehow to neglect...

22 May 2020 4,250 0 View

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

03 March 2021 8,272 1 View

Can we classify HV and LV lines based on line length?

I have dataset which shows the length of power lines. I need to classify the lines based on the line length. Is there a rule to classify the High voltage (HV) and low voltage (LV) lines based on...

03 March 2021 4,116 4 View

Waters 2707 HPLC autosampler problem?

I am using a 2707 waters HPLC device. When I try to inject a sample, it says missing plate or rack. I changed the needle and calibrated its position but I still get the same problem. I even get...

02 March 2021 1,408 1 View

Why almost every element would be metallized in sufficiently high pressure and low temperature?

(This statement is from wikipedia, BTW). What is so special about metallic bond that is limiting high-P low-T state of a matter (as long as individual atoms exist, not white dwarf of neutron star...

02 March 2021 3,309 2 View

How optimize the Size Exclusion Chromatography?

Hello! I'll do a size exclusion chromatography, but I only have an open column, and I'll perform the peptide extraction from yeast, using buffer lysis (sodium phosphate 50 mM/NaCl 30 mM/DNAse and...

01 March 2021 2,215 2 View

Does anyone know HRM channel in a 2 plex QIAGEN Rotor- Gene Q qPCR can be used as a separate channel?

I am going to have 3 different probes in my qPCR work that I am going to do. But I realized that the machine we have in the lab is a Rotor-Gene Q 2plex HRM Platform, saying it has green, yellow,...

01 March 2021 8,544 1 View

I have designed reflectarray element and feeding it though Horn Antenna on HFSS. After full wave simulation, I am not getting desired results?

I have designed reflectarray element to generate OAM beams at 5.8GHz and feeding it though Horn Antenna on HFSS. After full wave simulation, i am not getting desired results i.e Radiation pattern...

01 March 2021 9,701 5 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

Any research papers for extraction of nutrient deprivation on macroalgae? Analysed by HPLC-UV and GC/MS. Possibly from macroalgae genus Rhizoclonium?

I am doing my thesis on the nutrient deprivation on the macroalgae Rhizoclonium sp. I will be analysing the levels over a period of roughly 5 days by HPLC-UV and GC/MS. I will be using seawater as...

28 February 2021 6,477 1 View

Microstrip antenna design tutorial of HFSS 3D layout module ?

I have designed a 24 GHz rectangular antenna on HFSS 3D model and got desired results while desing the same antenna with same dimensions I am getting resonance frequency at 27 GHz I am...

28 February 2021 4,426 2 View