Best way to remove silver nitrate stains from a sink (probably ceramic)?

More Christopher Nock's questions See All

Am I uploading or downloading?

Until very recently, I "uploaded" items FROM my computer to the net. I "downloaded" things TO my computer from the net. Recently, I have seen these terms used the other way around! What's correct?

07 August 2018 8,721 0 View

Would Turkey ever go to war against Israel, or vice versa?

The war of words between the political leaders of these two countries continues to heat up. Would either side ever consider war itself to be a viable option?

06 July 2018 1,909 3 View

Are human beings able to contemplate their own nothingness?

Many people seem able to accept that they came from nothing. Most seem happy with the notion that they express their being during the time that they are alive. But very, very few are willing to...

06 July 2018 4,336 7 View

Does criticism of the policies and activities of the Israeli government constitute anti-Semitism?

I am NOT questioning the right of Israel to exist. Rather, I just wonder if reasonable criticisms of the policies and actions of the Israeli government constitute anti-Semitism. Some Israeli...

06 July 2018 4,078 2 View

The greater your ability to reason, the less facts you need?

Some minds seem to demand endless factual, or definitional input to provide a decision or an explanation. These outcomes often seem less convincing than those provided by high quality reasoning...

06 July 2018 6,276 17 View

How do they calculate RG scores?

It's a mystery to me! Multiple author work seems to give each author the same value as a single author piece. Some people with few contributions get far higher scores than regular publishers. Some...

06 July 2018 2,109 30 View

Do we get our political beliefs from the media we watch and read, or do we watch and read media that supports our existing views?

A question I was asked decades ago. Still not sure of the correct answer!

05 June 2018 5,939 7 View

For health reasons, should government set a minimum price for alcohol and junk foods?

In many countries--especially in the developed world--people harm their own health with too much alcohol and/or too much junk food. Does the government have a duty to lower consumption of these...

05 June 2018 8,329 14 View

Apparently Google AI can predict when you will die, if death is of natural causes. Would you want to know?

Don't ask me how they do it, but they do!

05 June 2018 4,304 2 View

Does it really matter if young children play with toy guns?

In my childhood all us good "cowboys" carried toy guns. Twenty years ago, the next generation did exactly the same. None us have turned into mass killers, or any type of killer at all. Prince...

05 June 2018 1,024 0 View

Hello researchers Is this a random laser or just fluorescence?

I am using Rhodamine6G as gain medium and silver nanoparticles as scatterers on a microscope slide and laser input 532 nm comes from above.

09 August 2024 9,894 2 View

Do I need specific antibodies to stain for a fusion protein?

I am staining some brain sections stored in cryoprotectant that express a Histone H2B- GFP fusion protein that were generated ~10 years ago. I know I need to enhance signal with an anti-GFP...

07 August 2024 5,338 2 View

How to determine positive-stained cells in FACS? Use isotype or unstained control?

To compare positive and negative cell populations in flow cytometry, should I compare unstained cells with antibody stained cells? Or with the isotype control? Most papers show comparison with...

06 August 2024 6,728 6 View

Can I multiplex a mouse monoclonal and rat primary for IHC (mouse brain tissue)?

Hi all, I was just wondering if anyone has experience with multiplexing a mouse monoclonal primary and a rat primary. I'm trying to multiplex by incubating them in the same well but was told by a...

06 August 2024 9,710 1 View

Why results of ROS flurescence are negative as there was no bacteria within?

Hello. I am working on ROS production of two systems: system A is cerium oxide and hydrogen peroxide, system B is cerium oxide nanoparticle, hydrogen peroxide and potassium bromide. I did some...

04 August 2024 5,974 3 View

How to Transform my handy-wavy explanation of why group I/II metals oxides in aqueous solution are basic into a rigorous argument?

I heard an explanation about something being a better proton acceptor or lone pair donor but that doesn't make sense. I couldn't explain in in terms of acid-base theory. The hand-waving way I saw...

03 August 2024 9,918 0 View

Senescence-associated beta galactosidase staining is False Positive in control group?

Hi guys If anyone is currently working on aging cells, you guys would like to give me some advice. I'm testing against biomarker (SA-beta-Gal), I encountered a false positive in the control group...

02 August 2024 6,735 1 View

What is the ionic radius of Hydrogen anion? And how to know the exact ionic radii of the elements?

I'm trying to calculate the tolerance factors of the hydride perovskite and the value calculated by me and the reported values are contradictory. Need more clarity in using the correct ionic radii...

01 August 2024 2,614 1 View

Is it possible to improve the reforming section of the Haber-Bosch process without using air separation units?

A typical reforming section in a large-scale Haber-Bosch process (Figure 1) comprises two reactors. A mixture of methane (CH4) and steam (H2O) is fed into a primary reformer to produce syngas via...

01 August 2024 7,051 5 View

How to make the concentration measurements for the hydrogen absorption/desorption in the metal hydride?

Hello Everyone! I am trying to create a metal hydride system where I am trying to create a temperature control with the emphasis on measuring the concentration of the hydrogen with the hydrogen...

29 July 2024 7,577 2 View

Christopher Nock

Thank you so much for such a clear and comprehensive answer! It's very much appreciated.

Christopher NOCK

Gudrun Lang

For acid cleaning of glassware we used 5% HNO3. This would not be as dangerous as concentrated HNO3.

Thanks

NOCK

Solution! The sink has been replaced, and the bill will be sent to the person responsible!

Cheque for the full amount received this morning!

Nock