Is there heteroscedasticity in my data, and if so how can I reduce it?

I am trying to perform a linear regression analysis but I fear that my data has heteroscedasticity, thus violating the assumption of homoscedasticity which is required for linear regression. I...

14 June 2020 199 3 View

Are two values statistically significantly different if their 95% Confidence Intervals do not overlap?

I estimated the percent tree cover for two fields and obtained as an example the following values ( 95 % CI): 13.67% (11.93-15.41%) and 9.27% (7.8-10.74%) . As the 95% CI do not overlap, can I...

09 May 2020 2,359 23 View

Is Linear mixed model appropriate for assessing if there is a difference in tree density between land use types. I have a nested data?

Below is a hypothetical example of how my data looks like in excel. My actual data has 16 sites and each site has about 10 plots, so its a huge dataset). Plots are nested within Sites. I would...

12 April 2020 9,774 6 View

How to determine organic matter structure?

how to determine soil organic matter structure?

01 February 2017 124 13 View

Can experimental anterior uveitis be achieved by subcutaneous injection other than intravitreal injection in rabbits?

What should the dose be for s.c? Studies using rabbits adopt intravitreal injection.

02 March 2014 2,804 1 View

How two melting peaks in DSC of polypropylene can be merged into one crystallization peak?

The figure shows DSC cooling (blue) and 2nd heating (green) curves (step: 10 K/min) for a commercial sample supplied as Atactic Polypropylene (APP). The heating curve illustrates two major...

03 March 2021 5,857 3 View

What is the production process of CaFe ferroalloys?

I looking for ferro calcium production process

03 March 2021 1,755 4 View

How to simultaneously perform multiple biochemical assays?

I am a research scholar working on heavy metal stress on plants. I will be doing biochemical characterisation( protein, carbohydrate, proline, antioxidant enzymes and many more assays) at interval...

01 March 2021 6,999 3 View

Can water be extracted from Olivine?

I have always been interested in geology and wondered about how unique structures of materials behave in different circumstances. I stumbled upon Olivine, the magnesium iron silicate, and heard...

28 February 2021 7,330 4 View

How does charge on working electrode changes with rising potential?

During performing CV of a GCE or modified GCE, we rise the potential in the first half of the cycle and reduce it in reverse half. During the first half, what is the nature of charge on GCE or...

25 February 2021 7,994 3 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 this the write procedure for acid digestion of soil for heavy metal analysis using AAS?

How to do acid digestion of soil sample with 3:1 aquaregia in an open vessel?

23 February 2021 3,053 7 View

What is the detection limit of ED-XRF technique for transition metals in silicon ?

Hi everybody, please, can someone tell us if the transition metals (W, Fe, Ni, etc ...) in silicon destined for solar cell manufacturing can be detected by ED-XRF technique. Note that the...

18 February 2021 6,231 4 View

I want to simulate a system containing protein and heavy metals; which force field is most reliable for this purpose?

The protein I want to simulate has multiple heavy metals. I wanted to know which force-field I should use with GROMACS to achieve this. Most importantly, do the latest updates in the force-field...

16 February 2021 2,420 1 View

Passivation of chromium cast Iron in high temperature?

14 February 2021 2,157 3 View