What could be a reason for the anomalous behavior of T2 relaxation at different temperatures?

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Can we deprotonate hydroxyl group of mandelic or salicylic acid?

Hydroxyl groups have pKa 13.6(saliclyic acid) and above 15(mandelic acid,not sure). What reagent can be used in a simple laboratory for the above purpose?

01 February 2013 635 6 View

How to decide the suitable pH for a coordination complex preparation (in general)?

Metal Chlorides undergo hydrolysis in water. So we add acid to prevent that. Now if we add the ligands and if the solubility product is low, we may end up with the precipitate. But do we need to...

09 October 2012 1,147 13 View

Measuring the concentration of lanthanide ion in aqua solution using citrate as the complexing agent

According to the literature, (Applied spectrosopy, Volume 47, Number 6, 1993), I should have got an absorption maxima at 240nm.. 1 had taken 1:1 ratio of citric acid and lanthanum chloride but my...

09 October 2012 5,102 1 View

How can I convert dialkyl ammonium chloride to dialkyl amine efficiently?

In the presence of excess of dialkyl amine, can I expect an equilibrium between the ammonium chloride (alkylated) and corresponding amine? How do I separate the expected dialkyl amine?

09 October 2012 691 2 View

How to convert secondary ammonium chloride to secondary amine?

Ammonium chloride can be alkylated quite easily. But how can we convert them to corresponding amines?

08 September 2012 9,254 1 View

Can anybody suggest a few examples for non-halogenated, hydrphobic and highly coordinating anions?

or Hydrophobic chelating ligands

08 September 2012 451 0 View

How to prepare 15N enriched amines?

15N enriched secondary amines from enriched ammonium chloride

08 September 2012 6,766 0 View

Preparation of Standard solutions of metal ions

How to prepare the stock solutions of exact concentrations of metal ions with the following composition XCl3. nH2O? Is it right if I consider the molecular weight of anhydrous salt for all my...

08 September 2012 6,285 13 View

How to prepare anhydrous salt of LnCl3. xH2O?

Ln=La,Lu,Y in particular.

07 August 2012 4,086 2 View

How to calculate CCS for Sodiated adduct ions and Multiply Charged Ions?

I'm currently working on calculating the collision cross section (CCS) for various ions, and I'm facing challenges when dealing with sodiated and multiply charged ions. Most of the resources I’ve...

08 August 2024 8,329 0 View

What is the solvent for 8YSZ nano material?

I need to do some experiment with it in liquid form.

07 August 2024 613 3 View

Hi, please what is the best tool on Aspen plus that can help me get the best inlet temperature and pressure for cryogenic distillation?

I am trying to recover liquid CO2 from a mixture of 0.6 CO2, 0.3 N2, and 0.1 O2. My aim is to recover about 99% liquid CO2 at the bottom of the column and make sure the amount of gaseous CO2...

06 August 2024 4,611 0 View

How much Yeast should we add to fermentation media?

I have prepared a liquid broth containing Yeast (S. Cerevisiae) that i need to add from it to fermentation media of lignocellulosic hydrolysate. I need to know based on what parameters do we add...

06 August 2024 662 1 View

Why might the impedance values for DI water and 0.1X PBS buffer solution exhibit a decreasing and increasing trend, respectively over time (HP 4194A)?

Hello everyone, I'm encountering an issue with my electrochemical impedance spectroscopy (EIS) measurements and would appreciate some insights. Experimental Setup: Electrodes: Gold interdigitated...

05 August 2024 3,783 2 View

What is the best protocol for freezing the rat brain in preparation for protein detection by Elisa ?

What is the best way to freeze the rat brain - liquid nitrogen, Dry ice , isopentane - after isolation for later protein investigation by Elisa?

01 August 2024 1,722 1 View

Mossbauer spectroscopy Co0.6Mn0.4Fe2O4 MNPs?

Following curve related to Co0.6Mn0.4Fe2O4 Magnetic nanoparticles with extra phase a-Fe2O3. I will appreciate to help me to interpretation this spectroscopy, especially the blue line.

31 July 2024 9,140 2 View

Inquiry on Maximum Nucleic Acid Volume for 2.5 mL Liposome Solution?

I am currently working on a project involving liposomes and need to determine the maximum volume of siRNA that can be added to a 2.5 mL liposome solution with a total lipid concentration of 10...

30 July 2024 6,420 1 View

How to calculate conductivity using Electrochemical Impedance Spectroscopy's Nyquist plot?

Hello everyone, I am new to this characterization but watching videos on youtube I have already plotted a Nyquist plot (Z' and -Z'') and already fitted models on my material using Zsim. But now I...

29 July 2024 1,376 0 View

How can I use DFT-D3 correction ( Siesta version 5.0.1)?

Dear Siesta Users, I installed Siesta 5.0.1 and I want to use Grimme's D3 correction. According to the 5.0.1 manual, I could use a few parameters to include the D3 correction in the...

27 July 2024 5,748 0 View