How can I take subsamples of water from a larger sample in a way that allows me to measure the iron content of the subsample?

I learned how to take subsamples with a magnetic stir bar, but I noticed iron particles stick to the bar, and I am having trouble finding a standard method to solve that problem. How can I take a...

04 February 2021 4,778 1 View

I am looking to develop a basic oral microbiome assay. Can anyone advise on culture vessel, conditions and organisms that require minimal maintenance?

I am looking to investigate oral care products with an easy-to-prepare culture of orally derrived microorganisms.

21 January 2021 3,448 1 View

PEI DNA in-vivo transfection concentration?

04 January 2021 6,908 7 View

What would be the recommended color/method for quad-IF?

I'm trying to perform quad-IF staining on frozen tissue sections on a fluorescent widefield (axioplan) microscope. I was wondering what people might suggest for colour/strategy for a co-IF...

13 October 2020 6,863 4 View

How do you remove the tolerance limits when running collinearity statistics in SPSS?

I am using SPSS syntax to determine multicollinearity with predictor variables of interest. When I enter the variables, SPSS is removing some of the variables because the minimum tolerance limit...

02 June 2020 3,639 1 View

How to distinguish different phases on an xrd pattern?

In XRD, how do you distinguish among the crystallized phase, amorphous phase, and a mixture of the two? How will the peak look like in a mixture of a crystalline and amorphous material?

05 May 2020 9,707 7 View

Which tools do you use for Systems Engineering?

Using a perfect toolchain for modeling every aspect of a system is possibly a dream. But perhaps one of you can recommend a tool, that supports most systems engineering tasks.

06 February 2020 2,909 3 View

Suggested packages/programs for automated detection of species-specific bird vocalizations?

Does anyone have suggestions for a user-friendly, open source, automated process for identifying species-specific bird vocalizations from audio recordings? I'm currently teaching myself to use...

04 February 2020 2,362 3 View

Are there any techniques to embed transmembrane proteins in solid lipid nanoparticles like liposomes or micelles?

25 January 2020 3,991 2 View

Specim FX17 hyperspectral camera/sensor - UAV/drone application?

Hey, I am looking into the feasibility of attaching a Specim FX17 sensor to a multi rotor system. Specs wise it looks possible, sensor is 1.4kg and Matrice M600 max payload is approx 15kg....

16 December 2019 4,169 2 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

What is the best way to keep an anaerobic chamber anoxic in the absence of hydrogen?

I'm a graduate student who works with an anaerobe, so I often work in an anaerobic chamber. I've been working on an assay that involves the steady-state of the quinone/ quinol pool. Anoxic...

03 March 2021 2,971 1 View

Good sites to recruit survey participants on a grad school student budget?

Any good recommendations for participant recruitment for online surveys on a grad school student budget?

02 March 2021 4,293 4 View

How to calculate average trend in maximum annual NDVI from MODIS?

I am wanting to calculate the average trend in maximum annual NDVI in Iceland from 2010-2020 using MODIS MYD13Q1 V6. How would I do this? I have currently inserted the NDVI bands from the MODIS...

02 March 2021 752 2 View

What SPSS analysis should I run with one IV (with two levels) and two DVs?

Hi, I am trying to figure out which test would be most appropriate to run for the following question: Is there a difference in task blood pressure between smokers and non-smokers? There are two...

01 March 2021 8,235 2 View

How can I make stacked bar graph with scatter plot?

I want to make a stacked bar graph with showing each data value as dots. I tried with graph pad prism, version 6, but could not succeed. Does anyone have tried before making such graphs?

01 March 2021 9,383 1 View

How to perform statistical analysis of coefficients extracted from transform techniques?

I am studying the potential of DCT and FFT coefficients extracted from a signal to classify the different objects that emit the signal. I applied the Shapiro-Wilk to confirm that data was not...

01 March 2021 8,079 2 View

Is anyone familiar with the cyclic compressive fatigue testing (BS EN 12697 - 25) ?

I would like to get more information on the cyclic compressive fatigue testing (BS EN 12697 - 25) which is typically done for bituminous material in pavement design. Any one can advise on the...

28 February 2021 2,004 3 View

Mediation path analysis - Can I run two seperate models?

I am wanting to run a serial mediation model with 2 x IVs, 2 x MVs, and 3 DPs (all continuous). Is it problematic to run 2 different models for each IV, keeping the MVs and DPs the same in each...

27 February 2021 5,681 3 View