Detection of colloidal metal precipiates?

03 April 2020 0 7K Report

We are investigating the precipitation of metals at very low concentrations (5 uM). is there a method that can detect the presence of colloidal precipitates.

we have tried turbidity and laser obscuration but no success

thanks

More Brian Reed's questions See All

How to prevent Vibratome Section shrinkage after 14 day culture?

I cut 50 um sections of tissue in agarose and need to culture them for 14 days before fixing.The sections have great surface area when I first section them, but after 14 days they shrink to sizes...

28 May 2024 9,861 0 View

Can 100% alcohol (95% EtOH, 5% methanol/isopropyl alcohol) be used for bacterial SEM dehydration?

I am preparing a protocol for SEM of a biofilm, but do not have easy access to 100% ethanol for the dehydration steps. Can 100% ethanol be substituted for 100% alcohol (95% EtOH, 5%...

07 May 2024 1,515 3 View

Crab identification via AI or other automated approaches?

I was curious if anyone has used AI or other software for identifying a species (particularly a crustacean or crab) automatically? I am reviewing monitoring approaches for the European green crab,...

18 April 2024 7,408 2 View

A good microscope for identification and pictures of aquatic larvae?

I am looking to get a microscope for the identification of larvae in aquatic invasive species work. Would like to use it for the identification of larvae for aquatic invasive species work....

18 April 2024 4,401 2 View

Can a single logical model incorporate objects that appear as things/objects at one scale, but relations at another?

Hello,o o o o o o o o o I have master's level training in logic and meta-logic, high marks, A's, but am not a practicing logician at all, I am a neo-empiricist pluralist (epistemic and...

18 April 2024 9,669 4 View

How to convert precipitation rate from kilogram per square meter per second (kg m-2 s-1) to millimeter per hour (mm h-1)?

Hello! I need some guidance or clarification regarding the units for precipitation rate or precipitation intensity (esp. for rainfall). I'm used to precipitation intensity being expressed in...

26 October 2023 9,704 2 View

Is this a Foraminifer?

I want to ask you if this is a foram or not. If it is, what genre or even specie we're talking about? Please. This is a sample collected in the East Pacific Ocean, specifically in the coast of...

18 September 2023 6,667 4 View

Is it common for Campylobacter lari colony size to differ greatly from primary streak to downstream plates?

Hello, I am currently doing a project requiring Camplyobacter lari growth. Our primary streak on Campy agar (similar to blood agar) produces very small (1 mm), translucent colonies, but after we...

21 August 2023 4,745 2 View

Possibility of salvaging old homogenized brain samples to look at synaptic markers?

A previous colleague homogenized brain samples and stored the supernatant at -80C. According to their lab notes, the homogenized samples were centrifuged at 13,000rpm, for 15 minutes at 4C. The...

30 July 2023 2,992 0 View

Abaqus. How do I make a set of cells using .getCells() on face object?

Hi I am trying to make a set of cells that are associated to one or more faces and save them in a set using python scripting for Abaqus CAE, but I cannot make it work. I have created and example...

22 June 2023 9,548 1 View

65% saturation of ammonium sulfate in 100 ml? (for protein precipitation)?

Hi All: I need to precipitate extracellular protein from supernatant. A bit confused with ammonium sulfate calculation. Should I be adding: 1. 65g of ammonium sulfate in 100 ml of...

09 July 2024 5,508 0 View

How to disperse silverparticles in water?

I synthesize silver nanoparticles ，and reserve it in water. Then, when I sonicate it some minutes or longer ,it couldn't be dispersed, most of them aggregate .Otherwise ,when I sonicate several...

09 July 2024 7,335 0 View

What is the basic difference between gum and hydrocolloid?

30 June 2024 4,031 3 View

My material is AlSi10Mg made by Selective laser melting. Why i am facing difficulty in EBSD?

1. Which phase should I select during EBSD? 2. Attached image is the polished surface but in your opinion what is on the surface of sample? it is oxide or colloidal? 3. Diamond polishing by paste...

27 June 2024 5,248 2 View

Why I am facing difficulty in EBSD of AlSi10Mg (made by selective laser melting)?

I had polished my sample till 3000 grade manually then done diamond polishing by 3 micron, 1 micron and 1/4 micron (By Diamond paste and aerosol). After that I had done colloidal polishing by 0.04...

19 June 2024 5,343 3 View

Challenges in Stabilizing and Concentrating a Highly Unstable Acetyltransferase for Crystallization?

I am working on an acetyltransferase that is highly unstable. Its pI is 6.65, and its molecular weight is around 18 kDa. The protein elutes at 1M imidazole and begins to precipitate immediately...

19 June 2024 2,590 0 View

Control of Colloid Stability through Zeta Potential/ book?

please i need this book as pdf (Riddick, T.M. Control of Colloid Stability through Zeta Potential; Livingston Publishing Company: Wynnewood, PA, USA, 1968)

15 June 2024 9,973 3 View

How to Precipitate of Glucose?

Does someone know any precipitating agent to precipitate glucose from 10 % glucose solution? or to remove glucose from solution

13 June 2024 438 0 View

How to reconstitute ATCC of B.ovatus?

I am trying to reconstitute the bacterium B.ovatus ATCC. it was first placed in a THIO broth and despite this we observed no turbidity. This was done 24h after the stick containing B.ovatus ATCC...

12 June 2024 1,644 3 View

How to precipitate dipeptide?

Hello I have synthesized a dipeptide in an aqueous media. Now I want to precipitate and filter it. How to precipitate it. Thank you in advance. Velmurugan S

11 June 2024 525 0 View