How can I measure the stability over time nanoparticles ?

04 May 2019 4,252 3 View

Synthesis of silver nanoparticles from leaves and tubers, and effects of AgNO3 concentrations ?

I'm trying to synthesize silver nano from parts of plants - Synthetic silver nanoparticles are thick and yellowish brown - Nano-silver from the roots is transparent at high Ag ionic...

08 September 2018 9,874 3 View

How to extract pure silver nanoparticles ?

I'm trying to synthesize silver nanoparticles. Some materials need to be centrifuged in order to remove unwanted material, washed with distilled water and dried. I do not understand this. Can...

08 September 2018 5,009 3 View

How can I draw a graph like this?

I have full data I tried Statgraphics and origin but it did not work

07 August 2018 9,415 0 View

How can we calculate the concentration of nanoparticles silver from TEM or UV-VIS ?

I produded NPs silver from trichoderma sp, I have UV-VIS machine, sample NPs 500ppm silver synthesized by chemical methods and TEM image of my NPs silver. Can I calculate the concentration of...

02 March 2018 7,171 1 View

How to compare two groups with only two measurements?

Hiiiii everyone! I have an enquiry on statistical analysis. I was looking for many forum and it's still cannot solve my problem. I want to compare means of two groups of data but only with two...

03 March 2021 8,796 3 View

Does the pressure(-600 mmHg) affects pH?

When I conducted the degassing experiment using decompression under anaerobic condition(and I used ferrous based chelating agent), the oxidized ferric were observerd. So, could you tell me the...

03 March 2021 4,892 5 View

What SPSS analysis should I run with one IV (with two levels) and two DVs?

Hi, I am trying to figure out which test would be most appropriate to run for the following question: Is there a difference in task blood pressure between smokers and non-smokers? There are two...

01 March 2021 8,235 2 View

Which database would give me this list of chemical components?

Dear colleagues: I would like to know if anyone knows of a database that gives me the parameters pH, K, K, Mg, P, C, N, Zn, Cu, Ni and Cd of common foods. I find a lot of information of proteins,...

26 February 2021 5,525 3 View

Statistics: include groups of respondents made by one person for analysis?

Good morning, I could not find literature about this so I am asking. I am organizing data for a questionnaire (N=100) that foresees some personal questions like level of education. For the aim...

25 February 2021 2,090 4 View

Sample size determination for non-parametric tests?

How do I run a a priori sample size determination for non-parametric tests, like the Mann-Whitney U-test and the Kruskall-Wallis or other non-parametric tests that accord with the unpaired t-test...

24 February 2021 166 6 View

Why is NH4OH added in heavy metals limit test?

The limit test I'm referring to is USP method II. In this procedure you need to dropwise add 6N of NH4OH to the sample until it the pH is alkali. After that you need to dilute and add HOAc until...

23 February 2021 2,049 3 View

Is there an ideal incubation time of RGO-modified SPCE before subsequent use, i.e., electrochemical characterization or further modification?

I notice that upon washing and air-drying of my RGO/SPCE surface and characterizing again via DPV, the current response towards ferricyanide probe significantly decreases. My worry is that the...

22 February 2021 5,324 3 View

No title

22 February 2021 9,932 11 View

Alternative to mediation analysis?

I am currently working on my dissertation and want to explore the role of competence as a mediator between the effect of colour of clothes on voting intention (focus on Western countries)....

21 February 2021 8,609 1 View