DMAE (deanol bitartrate)- dimethylaminoethanol bitartrate?

Hello all... I m looking for a method for assay DMAE (deanol bitartrate)- dimethylaminoethanol bitartrate in aqueous samples (cosmetic product) using GC- MS mass spectrum HP- 5 ms U.I 0.25...

13 February 2021 7,629 3 View

What is the right statistical test?

I have conducted a study in which the participants are divided in two separate groups according to the language of instruction. Also, they are divided in three different groups according to age....

04 January 2021 1,361 17 View

Can anyone suggest a PEG replacement in toothpaste formulations?

I am aware that PEG has unique properties however I am just reaching out there to see if anyone can suggest a valuable replacement. I was thinking Na PCA. Thank you

16 March 2020 2,729 3 View

Mudvolcanoes, fractures, gas and thermal water. Which are the relationships between these in pre-Apennines areas (central italy)?

Are Mudvolcanoes linked to rep thermal water? And, which are their connections with sinkholes areas?

25 September 2019 8,864 3 View

Why did you publish our MN without our pemission?

Dear Sir/Madam, this is an e-mail that I am going to send to your attention. It is mandatory that you cancel from your web site our manuscript submitted to the journal Cells. The manuscript...

16 April 2019 1,611 1 View

How would you interpret p-value using Egger's regression test?

Do you believe p-value

20 November 2017 5,225 7 View

Hi, could anyone give me some advice to clean the glassware from the excess of polymer urea-formaldehyde ? Thanks

The cleaning of the glassware after the synthesis of PUF particles is very difficult and almost impossible to remove completely the polymer attached to the walls, neither with acids, neither NaOH...

14 May 2017 5,577 3 View

Why i can't transfect huh-7 cells with an ad5 adenovirus vector?

06 April 2017 4,301 2 View

Does anyone knows how to clean a silver foil working electrode from any organical traces?

07 January 2016 6,026 6 View

Which is the best method for attaching CeO2 nanoparticles in graphene oxide hydrogel?

I have prepared graphene hydrogel from aqueous dispersion with ascorbate acid.

19 November 2015 8,658 3 View

How to consider effects of rapid warm adaptation in modeling of ecological impacts of warming?

I would highly appreciate it if my fellow ecologists (biologists) provide their opinion on the thoughts below [esp., shortly tell us which path may be more effective, if they know another way, if...

15 February 2021 3,642 6 View

What is the ideal pH for phosphate analysis?

I extracted phosphate from my sample using a sodium bicarbonate solution. When I acidify the sample to a very low pH, I see that the color development (using ammonium molybdate and ascorbic acid)...

25 November 2020 5,361 3 View

Root shoot ratio of seedlings?

what is the general trend in the R:S ratio of tree species at the seedling stage? early-successional vs. late-successional which ones have big R:S ratio? i see some contradicting results...

16 May 2020 5,266 4 View

How to choose proper buffer system for biophysical experiment?

In general biophysical experiments are carried out maintaining pH of around 7. For this purpose one can use various buffer systems like phosphate buffer, citrate buffer, tris buffer, bicarbonate...

23 March 2020 3,576 3 View

Is there any current research being done on ocean species that can convert carbonic acid?

For a class I am looking at the effects of ocean acidification, and within this although I am finding that there are species that are both negatively (coral, oysters, etc.) affected and positively...

11 February 2020 4,212 2 View

Is there any current research being done on ocean species that can convert carbonic acid?

For a class I am looking at the effects of ocean acidification, and within this although I am finding that there are species that are both negatively (coral, oysters, etc.) affected and positively...

01 February 2020 349 2 View

Use of HEPES in bicarbonate free media, what are the potential issues?

Hello all, I have used HEPES in the past to maintain my cells outside of CO2 incubators for extended periods of time, however some of my recent work would best be performed if the bicarbonate...

10 November 2019 1,796 3 View

Use of HEPES in bicarbonate free media, what are the potential issues?

Hello all, I have used HEPES in the past to maintain my cells outside of CO2 incubators for extended periods of time, however some of my recent work would best be performed if the bicarbonate...

05 November 2019 3,842 3 View

How do I get my basic synthetic urine to stop precipitating out the buffer?

Hello! I have been preparing synthetic urine at various pHs. I am struggling to prepare a synthetic urine at pH 9 with a Tris-HCl buffer, because there is always precipitate! I have tried the...

07 August 2019 1,603 3 View

Can I reconstitute dried peptides without trifluoroacetic acid or formic acid?

I want to quantify the recovery of tryptic peptides from a desalting method that I intend to use for preparing samples for LC-MS. My tryptic digests started out in ammonium bicarbonate and were...

07 August 2019 8,282 3 View