Does phthalic acid ester (PAE) have any toxic effect on plant tissues?

Apart from the endocrine distruption of PAE in humans, does it have any toxic effect on plant tissues? I would also appreciate if some can provide a brief protocol to determine PAE content in...

11 December 2017 6,205 0 View

Why is some scholarly articles published (though not open access) not shared with colleagues, even on a private level?

I have noticed that some requests for scholarly articles from colleagues on RG and some by private emails (though published mostly not on open access status), are always turned down stating that...

09 October 2017 3,082 4 View

What differentiate the XRD pattern of pure metallic Cu nanoparticles from Cu nanoparticles with impurities?

I have two XRD patterns of Cu nanoparticles of different sizes (

07 August 2017 8,940 18 View

What is the conversion factor of enzyme activity of ascorbate peroxidase and Glutathione reductase from U/L (SI Unit) to Umol/L

Please colleagues, I need to know how to convert the measure of enzyme activities in plants (Ascorbate peroxidase and Glutathione reductase) from the SI unit of U/L to umol/L. I found that most...

05 June 2017 871 2 View

What is the appropriate matrix (covariance or correlation) in principal component analysis?

05 June 2017 4,606 9 View

What is the environmental relevance of carbon black in the soil?

Firstly, I want to know the role of carbon black in soil restoration, perhaps it is effective in soil conditioning (fertility increase etc). Also, i would like to know if there is any empirical...

31 December 2016 9,208 13 View

What particle size is appropriate for the determination of total and bioavailable soil metal?

I want to know the precise range of particle sizes that are considered appropriate when determining total and bio-available metal concentrations in agricultural soils. I understand most scholarly...

31 December 2015 8,983 16 View

What method can be employed to determine the toxicity potential of extractable trace metal (e.g. Cu, Pb) in soil?

I want to determine the activity of extractable Cu (pCu2+) and Pb (pPb2+) in the soil to evaluate their toxicity potential after some period of aging. Can someone provide a detail protocol to go...

10 November 2015 6,020 5 View

What is the true measure of academic productivity in an academia?

Recently in developing countries, there have been series of debate on the measure of productivity of researchers/academics. Many advocate the use of metric method like impact factor of...

05 June 2015 1,092 1 View

What factors is most important in choosing biochar for metal immobilization in soil?

I want to choose some commercially manufactured biochars as soil amendment to immobilized heavy metal. The biochars are already characterized. I want to know what features are important to be...

02 March 2015 3,542 5 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

What's the best way to measure growth rates in House sparrow chicks from day 2 to day 10?

What's the best way to measure growth rates in House sparrow chicks from day 2 to day 10? Since, the growth curve from day 2 to 10 won't be like the "Logistic curve" it might not follow logistic...

03 March 2021 1,401 3 View

How to increase a model accuracy ?

dear community, my model is based feature extraction from non stationary signals using discrete Wavelet Transform and then using statistical features then machine learning classifiers in order to...

03 March 2021 6,994 5 View

1. What is the impact of having different scales in a survey? and how can we solve this problem before and after data collection (Literature)?

1. What is the impact of having different scales in a survey? and how can we solve this problem before and after data collection (Literature-based reflection)? Thank you for your time and for...

03 March 2021 2,870 3 View

What degree of missing data in a particular case/participant results in Expectation-Maximisation no longer working?

I'm dealing with a mediation model and am using the PROCESS module in SPSS. Due to SPSS and PROCESS being limited in the imputation methods - being unable to handle multiple imputation - the other...

02 March 2021 4,362 1 View

Can NFL theorem be valid in infinite search space in ML?

NFL theorem is valid for algorithms training in fixed training set. However, the general characteristic of algorithms in expanded or open dataset has not been proved yet. Could you show your...

01 March 2021 1,189 3 View

Does anyone know how to plot my station to a section plot on Ocean Data View (ODV)?

I made a vertical section plot with WOA .nc file on ODV, and now I want to plot my stations (csv. file) in it. Does anyone know how to import my points to the section? They are two different...

01 March 2021 3,610 1 View

How to address this issue in the analysis of Real-Time PCR results?

To dear Researchers, I was analyzing a series of concentration for estimation of Real-Time PCR efficiency. The concentration was 1:10. I used MS-excel to evaluate Slope. The result of slope was -8...

01 March 2021 8,683 4 View

How to arrange coordinates and extract climate dataset out of MPI-ESM-MR netcdf files?

Have a nice day everyone, I'm stuck in extracting datasets out of MPI-ESM-MR netcdf files because the latitude ranges from -3*10^6 to 3*10^6 and longitude ranges -5,9*10^6 to 5,9*10^6. Plus, the...

28 February 2021 912 3 View

Is there any Machine Learning/AI algorithm that lets you predict with incomplete features without missing value imputation process?

For instance, the model is trained with A,B,C,D,E features to predict F target. Then, I want to make prediction on a new data, but with only A,C,D,E is known without doing missing value imputation...

28 February 2021 1,556 6 View