Do you know Psychometric Test or questionnaires specifically designed to evaluate tennis players?

28 September 2020 6,850 7 View

Motivations for Play in Online Item Inventory of Yee (2006) - Spanish Version?

Hello! Is someone aware of if exist a Spanish version of the Motivations for Play in Online item inventory created by Yee (2006)? I found a French version, but not a Spanish one. Yee, N. (2006)....

26 March 2020 2,027 3 View

Time trend analysis and sample size?

I am trying to determine if certain contaminants are decreasing in birds over time (1960-Present). Data was pulled from the literature and I've grouped birds based on their dietary habits. When I...

22 June 2018 5,315 3 View

It is possible to make turmeric/derivates soluble in water? How?

Curcumins, curcuminoids water soluble... it is possible???

20 March 2017 3,468 9 View

Why MLP is not converging?

05 October 2016 3,817 8 View

Has someone used TrypLE Select to detach macrophages?

21 May 2016 9,912 1 View

Any suggestions to prove the positiveness of a real valued function of $n$ variables?

I want to prove that certain function $F:\Delta\to\mathbb{R}$ is non-negative (or find some counterexample). Where $\Delta$ is the $n$ dimensional simplex.The details are in the attached document,...

11 August 2015 5,856 2 View

Has anyone worked on a demarcation criteria for complex systems theory?

Most people speak about, and work on, complexity science, systems science, cybernetics, and complex thinking (i.e. Morin) as though they were the same. Although a sort of demarcation criteria has...

07 April 2014 6,117 27 View

Is there a future for human workforce?

How will Robotics, AI, Machine Learning, and Advanced Intelligent Algorithms impact our lives, our jobs and World Economy?

01 January 1970 3,257 24 View

By which mechanism does potassium hyrdoxide works as an activator in the preparation of activated carbon?

Activated carbon is prepared from biomass using KOH as the activating agent. What is the possible reaction between KOH and the biomass?

14 February 2021 8,095 4 View

Buffer for protein solubilization after acetone/AS precipitation that is compatible with cell stimulation?

Hello! I am precipitating some proteins (with either acetone or ammonium sulphate) and I need to resuspend the protein pellet in a buffer that properly keeps the proteins soluble AND which is...

27 January 2021 6,958 4 View

How does a pH 13 buffer solution containing NaOH/KCl work?

pH 13 Buffer solution is prepared from a strong base sodium hydroxide and potassium chloride salt. However a buffer contain a weak base or weak acid with their salts. What is the purpose of the...

26 January 2021 9,154 1 View

Does anyone know the pH-differential method?

I use the water method to extract the anthocyanidin from Peristrophe bivalvis (L.) Merr leave, then dilute 20 times with 0.025M potassium chloride, pH1.0 and 0.4M sodium acetate buffer, pH4.5...

20 January 2021 8,305 4 View

How we can isolated MnO2 from solid organic product ?

The compound 1,4-dihydro pyridine oxidized in the presence of potassium permanganate and microwave. After oxidation, the organic product and manganese dioxide are formed, and the two substances...

09 January 2021 5,358 4 View

What is the Role of temperature In Hummers method for the preparation of graphene oxide?

04 January 2021 5,033 2 View

Can one eat Muriate of Potash Fertilizer?

What is edibility safety of fertilizer-grade Muriate of potash? Muriate of Potash (MOP) is essentially KCl with often red rust from iron oxides. In order to balance excess Na and deficit K...

25 December 2020 6,179 6 View

Is it safe to remove performic acid from protein via freeze drying?

I use solution of performic acid (30% hydrogen peroxide and 80% formic acid mixed 1:9) to solubilize a protein. Is it safe to separate the performic acid from the protein via freeze drying? Should...

25 November 2020 8,045 3 View

Acesulfame Potassium and Acesulfame and Conversion?

Dear to whom it may concern, Based on ChemAxon, I calculated pKa values of Acesulfame as follows: 1. pKa (Strongest Acidic): 3.02 2. pKa (Strongest Basic): -6 Because I would like to convert...

25 November 2020 4,577 3 View

Potassium formate/water or potassium formate+LiBr/Water are not available in the commercial sector for absorption refrigeration systems?

Although there are already studies in the literature but not much , the use of potassium formate/water or potassium formate+LiBr/Water are not available in the commercial sector for absorption...

16 November 2020 2,917 2 View