Determination of PAH in soil

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What are the options for global scale hydrology DEM?

Hello, I am working on a global scale hydrology GIS project delineating global watersheds and doing some data analysis. I have in the past used hydro1K from the USGS that cover the entire world....

18 February 2021 5,109 5 View

Can anyone help me with meta-analyses on classification ML models?

I am working on a meta-analysis for classification methods (end goal is developing a tool selection framework) and I am having a difficult time finding similar studies. Does anyone know any...

25 October 2020 2,323 4 View

Hello, can anyone recommend source of a user friendly and readily available Analytic Hierarchy Process (AHP) software for my project work?

Hello, I'm seeking to make an optimal oil and gas multi-criteria project management decision using Analytic Hierarchy Process (AHP). Thanks to revert with source of applicable professional...

01 September 2020 5,559 15 View

What approach is most suitable for boosting innovation in a Nigeria's tertiary institution to enable it provide solutions to societal challenges?

This question stems from the fact that Nigeria has over 20 Electrical Engineering departments that have not provided the Nigerian society with a sustainable, environmental friendly option to curb...

04 September 2019 5,166 6 View

How to take SEM (Scanning Electron Microscopy) and TEM (Transmission Electron Microscopy)?

I want to take the SEM and TEM images of samples I synthesized. I synthesized g-C3N4 (Graphitic Carbon Nitride). If I need to take SEM and TEM, should I disperse the obtained powder in a medium...

23 August 2019 1,892 9 View

What are the basic tests required for Supercapacitors?

I am planning to shift focus from batteries to supercapacitors. I would like to know if I synthesize materials for a supercapacitor, WHAT are the basic tests that need to be conducted?

16 August 2019 5,184 3 View

What are the possible solvent mediums to disperse g-C3N4 (Graphitic Carbon Nitride) ?

I need to disperse g-C3N4 in a medium. Please give suggestions. I want to create a thin film; MXene is dispersible in water, so I want to know if g-C3N4 is also dispersible in water, so that I can...

12 August 2019 667 2 View

How do you calculate CFU/g soil?

Dear All, I need your help on how to calculate CFU/g soil. I would greatly appreciate if you could check if my calculation is correct. 5 g of soil was placed into 50 mL water. The solution was...

21 April 2019 8,013 8 View

Can I replace missing values in a binary data with a zero?

I am working on three different survey data; each has 20 binary variables for Hierarchical Cluster Analysis (HCA) on SPSS. Out of the 441, 2869 and 2543 total samples for each survey, only 42...

22 October 2018 6,549 10 View

How reliable is X-ray flourescence (XRF) in determining elemental contents of biological samples?

I want to seek the opinions of experts in the field of environmental science. I intend to determine elemental contents of some freeze dried plant samples collected after an experiment. Since I...

12 September 2017 4,237 10 View

Where to find data on trees in tropical agroforestry?

Hi, I'm looking for data (mainly related to management: growth rate, canopy size, soil and climate preferences, etc.) about tropical trees used in tropical agroforestry. Have you ever heard about...

28 February 2021 7,356 8 View

The Shannon's index is inversely proportional to Simpson's index (1-D)?

I'm having a problem with my bloxplot with Shannon's and Simpson's indexs. The value of Shannon for my Community 1 indicating higher diversity (in relation of the Community 2), but have lower...

26 February 2021 3,033 9 View

Any recommendations for methods to analyze elephant space-use (using GPS) and correlating this with changes in NDVI?

For my Masters I am looking into elephant space-use and its effect on vegetation change. I have elephant GPS collar data and was going to use Google Earth Engine to obtain NDVI values. I would...

16 February 2021 7,097 3 View

How to consider effects of rapid warm adaptation in modeling of ecological impacts of warming?

I would highly appreciate it if my fellow ecologists (biologists) provide their opinion on the thoughts below [esp., shortly tell us which path may be more effective, if they know another way, if...

15 February 2021 3,642 6 View

What is the magnitude of yearly rhizopdeposition in tropical forests?

Hi all, I am trying to find reference values on annual soil rhizodeposition rates for different kinds of forests, with a particular interest for tropical rainforests. Do we have an idea of the...

26 January 2021 4,278 4 View

Can you recommend a good book on analytical chemistry for non-chemists?

Dear colleagues, I am asking for you recommendation: I need a book on analytical chemistry in environmental sciences. As a non-chemist (a biologist) I have some basic chemistry knowledge but not...

25 January 2021 8,486 8 View

Why are my Maxent SDM projections coming up almost entirely blue?

Hello Maxent Community, I have been generating SDM models and projections in Maxent. I have had some success with one set of variables (some Hydroshed variables mixed with World CLIM variables);...

19 January 2021 3,994 7 View

How deep into the sediment do marine/riverine oligochaetes live?

I am working with intertidal muddy sediments. In one of my sites the sediment was extremely muddy (high % of silt), oxic layer was shallow, and there were a lot of oligochaetes. I would like to...

14 January 2021 7,269 4 View

How to make open-top chambers?

Hi, I wonder if someone would share experience with building open-top chambers for surface heating of soil. My main question is what material can be used to build them? I found researchers using...

05 January 2021 5,396 6 View

R package for multivariate dispersion as a measure of beta diversity?

Hello, everyone: I've been reading some old and new papers on how to compute beta diversity using incidence or abundance data from several assemblages/communities. For my data, I am interested...

03 January 2021 9,293 1 View