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 8,560 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 1,757 3 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 3,921 2 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 4,180 7 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 6,108 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 1,948 30 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 8,096 14 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 5,782 7 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 4,152 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 875 0 View

What is the best way to keep an anaerobic chamber anoxic in the absence of hydrogen?

I'm a graduate student who works with an anaerobe, so I often work in an anaerobic chamber. I've been working on an assay that involves the steady-state of the quinone/ quinol pool. Anoxic...

03 March 2021 2,971 1 View

How to compare different concentrations of nanoparticles for characterization from ICP-MS?

I took measurements of different concentrations of 15 nm and 5 nm Au nano particle solutions. I'm trying to determine which concentration I measured gives the best reading overall. I also...

02 March 2021 7,626 1 View

What are the new 2D nanomaterials were used for Silver nanoparticles stabilization?

In the stabilization of AgNPs are vital in current research interest. However, some of the 2D nano-materials like graphene oxide, MoS2, etc... previously used to stabilize it. But still they shown...

01 March 2021 2,207 3 View

Interested to stain mice tissue with WGA 488 conjugate, anybody has a protocol to recommend?

Interested to stain mice brain tissue with WGA 488 conjugate, appreciate if anyone willing to offer me some guidance or suggestions! Thank you!

28 February 2021 3,951 2 View

B-mercaptoethanol (BME) protocol?

Hi everybody, I have been running a multiplex IHC which allow me to stain the same tissue with different markers (Primary Ab + Secondary conjugated Ab) (AF487, AF555, AF647). Since I would like to...

27 February 2021 5,028 2 View

Why do my MCFs not form monolayer?

Hello, I am looking for some expertise on culturing MCF7s. I purchased them from ATCC and I have been following all media and culture conditions. Media is EMEM with 10% FBS and 10ug/mL of...

27 February 2021 3,904 2 View

Which transition metal salt precursor is best for doping? Why?

I would like to synthesize a transition metal doped TiO2 via solgel method. Hence, I would like to know which metal salt precursor to choose among Chloride, Nitrate, and Sulphate. A clear...

27 February 2021 4,285 3 View

Does different dilution factors affect negatively on NH3 reading ?

I have a sample of treated water sample & asked to obtain ammonia conc. in sample using a machine with 5-25 ppm detection range. However, upon testing with different dilution factors, all...

27 February 2021 8,483 3 View

Is there anyone who experienced with cytotoxic effect of Hoescht 33342 dye?

Is Hoechst toxic to cells? In general, it is known as non-toxic. I am working with dsRED MDA-MB-231 cell line. I applied it for my PDMS-based microfluidic platform, for this reason, I incubated...

26 February 2021 9,119 3 View

Why my agarose gel staining sometimes looks not homogenic but like gradient (see the figure)?

I am worried about this overexposure of the upper part of the gel in the picture. Is it possible that this is the result of too much concentration of ethidium bromide? Why is there such a big...

25 February 2021 8,140 3 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