Which LCIA method is most suitable for assessing the impacts of nitrate leaching in groundwater (eutrophication )?

The eutrophication of groundwater by nitrate leaching is major environmental problem in Germany, especially in areas with intensive agriculture and high N-fertilizer inputs. In addition there are...

16 January 2021 5,182 7 View

Why have a specified percentage absorbance to be reached for flow test on UV Vis?

When performing a flow test the objective is to find the total amount of blank to be replaced by sample with pump. Why would a specified percentage of 100% i.e. 99.5% of that absorbance be used?

17 December 2020 7,762 3 View

Do Radial Basis Function Networks trained through Gradient Descent benefit from Logistic Regression?

When training a Radial Basis Function Classifier for classification problems, we generally train the model by making use of the pseudo-inverse of the design matrix, minimizing the MSE error...

09 December 2020 2,190 1 View

Repeated measures ANOVA with technical replicates?

I am doing an experiment where I measure the blood pressure of a treatment and control group over the course of several weeks. At each measurement session I collect multiple recordings. From what...

06 December 2020 531 7 View

How do I determining reaction orders?

Our lab had run some experiments to electrochemically degrade some compounds. When I plotted the data to see if the ractions were first or second order, the R-squared values were generally about...

04 May 2020 2,809 3 View

Good books on the history of the HIV epidemic?

Does anybody knows a couple good books on the history of the HIV epidemic and first outbreak response? Trying to trace some parallels and I believe that as I was not born at that time some good...

19 April 2017 8,956 3 View

Does anyone have any experience with Picarro G4301 Analyzer? Have you been satisfied with the performance?

I plan to use tha analyzer for measuring CH4 and CO2 fluxes during a field campaign.

25 January 2017 3,980 2 View

How can I do a convex combination between a point (center of mass) in a convex hull and its boundary?

Hi everyone, I have the following situation: Let T be a two-dimensional manifold in R^3 (in particular I am working with spherical triangles on the unit sphere) and C = conv(T) be its convex hull...

24 May 2016 8,345 4 View

Small protein (dimer) connected by only one disulfide bridge?

11 May 2016 645 5 View

What is the taxonomy and reproduction habits of copepod Parvocalanus crassirostris?

What is the taxonomy and reproduction habits of copepod Parvocalanus crassirostris?

14 April 2015 5,891 3 View

What could be the reason for XRD pattern starting from very high counts/intensity at 3 degree 2 theta?

I am working on XRD analysis of the clay minerals from the sea sediments. My XRD pattern shows very high counts at the start of the XRD pattern (3 degree 2 theta) which is very unusual. The counts...

31 January 2021 4,493 9 View

Is it possible to prepare clay minerals by mixing pure oxides of required elements? What would be theoretical difficulties with it?

Practically this is not at all necessary. But theoretically, would hydrous/hydrothermal synthesis be enough (like mix 1 mole alumina gel and 4 mole silica gel and gently heat) or would it require...

26 January 2021 6,403 3 View

How can I realise the separation of clay mineral part from soil ? and what is this process called ?

Hey; I am looking to work on clays in my soil samples, So I need to extract them first. I know that I should first remove all the bending agents that make the clay sheets stay connected like (...

24 December 2020 7,082 2 View

Which software should be used for XRD analysis in case of soils?

I am using XRD test for indentification of minerals and amount of it.

10 December 2020 8,173 4 View

How to identify and quantify glauconite and illite/other mica present in same sample from XRD analysis?

In glauconite bearing sand stone sample other mica group minerals(illite, muscovite etc.) are also present. I want to quantify the amount of glauconite and othermica group minerals. How, I can...

10 December 2020 5,793 19 View

How to obtain a mineral map using Hyperion image in ENVI or in Erdas Imagine?

Input is a Hyperion hyperspectral image. I followed steps Preprocessing, MNF, ppi, nD visualizer and SAM. Also spectral anayst used. I found minerals by spectral resampling of imagery spectral...

23 November 2020 8,915 4 View

Can SEM-EDS give a chemical formula?

I have attached an excel file with the quantification of a mineral I conducted EDS on. I have more excel files of minerals too as I know EDS spectra for only 1 sample will certainly not be...

03 November 2020 6,899 9 View

How can I obtain the cohesive energy density and solubility parameter for a crystal using the Materials Studio software?

Hello, I am currently analyzing properties of some minerals such as Bi2O3 by MD using Materials Studio, I need to obtain the cohesive energy density (CED) to obtain the solubility parameter,...

02 November 2020 4,356 1 View

What are the steps involved in executing a search and match within highscore Plus for XRD patterns?

This is my first time using XRD and the highscore plus software, so any help would be appreciated. I want to execute a search and match to determine which minerals are present within my samples....

15 October 2020 2,086 7 View

How to calculate element percentage from XRD analysis for mineral identification?

I have carried out a XRD analysis to determine mineral identification. I used Origin 8 program in phase identification. I couldn't carry out XRF. Is it possible and reliable to obtain different...

13 October 2020 9,228 8 View