Can anyone explain how to calculate particle size from ultraviolet-visible (Uv-Vis) spectra?

10 November 2016 1,004 5 View

How can I synthesis Cobalt oxide nanoparticle? is it magnetic?

what's material must be used?

09 October 2016 4,417 3 View

What's the minimum transmission or maximize absorbance can be used for quantitative analysis in uv/vis spectroscopy and why?

solution is not important

09 October 2016 9,920 4 View

How can I measure the charge/zeta potential of magnetic core-shell nano particles in laboratory (we don't have a DLS) ??

09 October 2016 8,135 4 View

How can I confirm the structure of nano Iron oxide@Poly dopamine (Fe3O4@PDA) particles with XRD? What are the characteristic peaks?

below file is my XRD peak

09 October 2016 802 16 View

How can I prepar complex of Co(DMG)2 solution?

How can I prepar complex of Co(DMG)2 solution for Uv/Vis determination from CoCl2.6H2O? what's the condition?

09 October 2016 5,645 2 View

I need to know How prepare complex of Cu(DTPA) for determination by UV/VIS??and what's the color of Complex?

DTPA=pantetic acid Mw=393.35 gr/mol

05 June 2016 8,010 0 View

Benefits of the 24 welled plate?

We have always used the 96 welled plate, the 48 welled plate but apparently there is much evidence on the 24 welled plate and above all its benefits.It states it is the same you would use on ELISA...

28 February 2021 1,149 1 View

What does it require to be ready for e-Commerce in developing countries?

Most developing countries are not ready for e-Commerce? What dimensions and indicators are there to measure e-commerce readiness of a nation? Please share framework or model and evaluation...

22 February 2021 8,132 6 View

In methylene blue test Why is UV absorbance reading very low as soon adsorbent is added and then increasing before reaching equilibrium?

Hello, I'm working on removal of methylene blue. 01. in the dark test very first reading is taken 15 minutes after adding adsorbent to the dye solution and that UV absorbance reading is very...

19 February 2021 472 5 View

Reliable and Valid Instrument for Causes of Medical Errors?

Is there any questionnaire/survey that measures the causes of medical errors? Example: physician negligence vs. systemic issues. Looking for a reliable and validated instrument. Thank you!

15 February 2021 2,874 4 View

How do I categories into groups on SPSS?

I am using the 'Revised Cyber Bullying Inventory'. This instrument has 2 sub-scales (bully scale and victim scale). From the responses, they will be divided into 4 groups (pure cyberbullies, pure...

13 February 2021 5,787 4 View

Which is the best wavelength to study aerosol optical depth(AOD) related to climate reseach,which criteria must be adopted in choosing the wavelengh?

We are doing a study on impact of aerosol on precipitation. Which satellite data and which wavelength will be the best. or can some one suggest a criteria to be adopted to choose an instrument...

12 February 2021 6,324 3 View

How to correctly reference instruments in systematic review following APA?

Hello, I am running into an issue and do not know how to cite / reference correctly here. APA states that instruments and measurements need to be referenced with the author's name. At the same...

11 February 2021 9,523 3 View

Which and How to use teaching strategies and procedures to effectively integrate the four skills while teaching English Language Online?

As an inexperienced teacher in the field of online teaching, I have the fear of unconsciously ignoring one of the skills while focusing on not ignoring the other! Therefore, I wish to make use of...

09 February 2021 5,101 4 View

Rousseau Psychological Contract instrument?

Hi, I would appreciated if someone who's studying the Psychological contrat could help me about this questionnaire : My question is the following : Is someone can help me identify how wich...

09 February 2021 9,162 3 View

Handheld Portable Raman spectroscopy systems - recommendations and experience?

Hi all, I am looking for some general feedback and information from those that have experience using handheld/portable systems? I am looking at the prospects of using an off the shelf system from...

07 February 2021 9,691 3 View