How can Gold be extracted from mining concentrates?

I work at a precious metal refinery. We extract gold using aqua regia. However, sometimes Gold does not dissolve in AR. Sometimes it precipitates due to cold weather? Is there a way to make sure...

07 August 2020 7,059 3 View

What will be the moment direction in vertical axis wind turbine?

I am working on the vertical axis wind turbine project. I have attached the picture in 2D. Wind direction is from negative X to the positive X direction. I applied 200 rpm in fluent and the...

17 November 2019 2,803 3 View

How to interpret Direct Aerosol Radiative Forcing (DARF) values?

I've calculated Direct Aerosol Radiative Forcing(DARF) values (W/m2) for Ahmedabad and Gandhinagar City, Gujarat, India using SBDART Model (AOD values as an input) at Top Of Atmosphere (TOA),...

22 October 2019 9,877 4 View

Why i am not ble to view bands on 10% and 12% SDS PAGE?

I am working on isolation of protein from stem of Nicotiana tabacum. I used protein extraction buffer and acetone precipitation method. From bradford assay, 1mg protein yield was found. 12% and...

24 September 2019 5,008 9 View

SSVEP signals are not properly generated. What should be the idle condition for SSVEP signal recording?

I have created the scenario with 4 red LEDs flickering with different frequencies separated by minimum 20 cm (at the side of monitor). The selected flickering frequencies sets were (6.25, 6.66,...

07 May 2019 5,352 1 View

How to calculate the weight of cement in M25 grade concrete of known volume?

Attempting to conduct a research inquiry on M25 concrete and was looking to validate a technique I found: Multiply the volume by 1.54 Divide previous value by 4 (since ratio of...

27 February 2019 7,494 5 View

What parameters influences permselectivity measurements?

In apparent permselectivity or Hittorf method for transport number measurements (3 x 30 min measurements per concentration) , a permselectivity of more than one was observed for commercial CEM....

16 January 2019 1,755 3 View

Will coating a glass slide with ZnO nanoparticles from Sigma Aldrich make it birefringent?

I was wondering given the elliptical shape of ZnO nanoparticles, if they are spin coated on a glass slide, would it make it bi-refringent? The spectrum of light i am working on is NIR - 800-900...

18 November 2018 2,321 3 View

Synthesis of silver nanoparticles with bioactive compounds of ethanolic extract of stem of plant. How should i decrease the size?

We are basically forming the silver nanoparticles by bioreduction methods by using flavonoids as source. we have extracted our polyphenolic flavonoids in ethanolic extract from plants and we are...

09 September 2018 7,284 3 View

What are some alternative etchants for Silicon Nitride?

I am aware of HF and H3PO4. I was wondering if there are some other solvents that dissolve Silicon Nitride selectively while leaving Silicon dioxide alone.

31 July 2018 2,702 2 View

New Journal, "Integrative Psychological and Behavioral Science" -- do you not know, and have you not seen, this done before?

Question to you and THEM, the New Journal, "Integrative Psychological and Behavioral Science" -- do you not know, and have you not seen, this done before? There appears to be a core problem for...

02 March 2021 3,024 2 View

Which is a lucid standard comprehensive book to guide on psychological scale construction and its standardization?

02 March 2021 7,082 3 View

How to define and get results (stresses) for certain points of a model in abaqus, using python? When the size of the model changes?

I want to do a parameter study of a aixsymmetric cylinder in Abaqus. I want to create several jobs where I get the stresses for 3 different points in my model. These points are defined. I wrote a...

01 March 2021 10,078 1 View

LOAD DISPLACEMENT CURVES Stiffness increasing in ANSYS non linear analysis. HOW CAN I CORRECT IT?

Hi. I am doing non linear FE analysis using a new material beam under flexural 2 point loading using ANSYS. I have defined a bilinear material model. The solution has converged. In results I am...

01 March 2021 9,911 3 View

How to choose ANN number of hidden layers and nodes?

Hello, Could you please share any interesting research explaining how to choose the number of hidden layers and nodes per layer in case of regression problems using ANN? Thank you, any help would...

01 March 2021 6,200 3 View

PUC19 as a transfer plasmid for lentiviral delivery?

Hello, Is it possible to use pUC19 as a transfer vector to be packed in using the second generation viral particles packaging system( pMD2.G; psPAX2 plasmids)? As far as I understand it there is...

28 February 2021 4,868 2 View

How could I take into consideration the weights of observation in a system of seemingly unrelated regressions (SUR) in rstudio?

I build a model of 4 regression equations (probit and OLS) in R studio. I need to take the weights of observations into consideration. While it is simple to do so for every regression equation,...

27 February 2021 1,233 1 View

Can random sampling have inclusion criteria?

As random sampling means that everyone in the population have an equal chance to be chosen, can it have inclusion criteria? My research participants have been chosen based on the inclusion...

26 February 2021 6,905 10 View

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

Stress/strain tensors decomposition ???

25 February 2021 6,760 1 View