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

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

raman peaks at 488 and 2448 cm inverse? please help!???

Raman spectroscopy does anyone know what mineral (if any) gives raman peaks at 488 and 2448 cm inverse? please help!???

20 September 2018 8,941 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

what is the simplest definition of ion exchange capacity

What this unit identifies for the ion exchange capacity ca. 0.92 meq. g-1. I am a newcomer in the membrane area. I just started. I highly appreciate your help

08 May 2021 0 0 View

what is the simplest definition of ion exchange capacity

What this unit identifies for the ion exchange capacity ca. 0.92 meq. g-1. I am a newcomer in the membrane area. I just started. I highly appreciate your help

08 May 2021 0 0 View

What is the most reliable source to get Impact factor of journals?

Source to get Impact factor of journals

01 March 2021 6,654 2 View

Is CD44 degraded in lysosome together with hyaluronan after CD44 mediated endocytosis of hyaluronic acid?

Also when RHAMM binds hyaluronic acid, they get internalized, will RHAMM also be degraded? Or both CD44 and RHAMM will be transferred back to the cell membrane? Asking for breast cancer cell line...

01 March 2021 8,169 2 View

Dapi fluorescence protocol for colon cell lines ?

28 February 2021 2,534 2 View

Which index or sites are reliable in determining of plant species?

There are many indexes when determining plant species: Plants of the World Online (POWO), International Plants Names Index (www.ipni.org), The Plant List (www.theplantlist.org) and others. But...

26 February 2021 3,404 10 View

How the Ground Plane implantation is performed without damaging (and w/o varying the undoped nature) the top Si (8-10 nm) in FDSOI technology ?

It is a general practice to introduce Ground Plane in FDSOI devices under the BoX. The Ground Planes are introduced by Ion Implantation through Top Si layer and Buried Oxide. I wanted to know that...

24 February 2021 5,974 4 View

Cloudy/high background western blot - can anyone help me?

Hi everyone! I try to detect VDR protein (~48 kDa) using Western Blot. After SDS-PAGE using 10% MP TGX Stain-Free Gel from BioRad I transferred the protein onto an metOH activated PVDF membrane...

23 February 2021 6,266 3 View

How much cell pressure and back pressure should I apply to start for triaxial test for different types of soil?

We have recently purchased a triaxial test instrument (MATEST) for testing different types of soil. After installing software, we are facing a issue of saturation where the samples does not...

23 February 2021 7,194 4 View

How do historians determine the credibility sources in modern history?

For a source to be considered reliable it must contain accurate historical information. But how does one determine the accuracy and reliability of sources in modern and recent history since not...

23 February 2021 1,346 13 View