Spatial thinking and geographical reasoning: what are their conceptual differences and interrelations in teaching geography?

I am conducting a state-of-the-art analysis of these concepts. If you have contributions, please, send me.

17 January 2021 1,123 3 View

How do i interpret this inconsistent mediation in my results ?

Dear all and any, I have run a mediation analysis on SPSS using the PROCESS extension (model 4). My results don't really make any intuitive sense, where my ID (availability of healthy fast foods,...

09 January 2021 7,812 2 View

Does anyone know methodological references with techniques for random allocation (randomization) in Qualitative Research?

If that makes any sense....

03 October 2020 3,845 9 View

In indirect ELISA, how much recombinant protein should be add per well in 96 well?

19 September 2020 449 3 View

Tukey or Multiple t-tests ?

Hello everyone. I am conducting an experiment to evaluate if a compound inhibits a parasite growth quickly or slowly. To do this, I measure the IC50 of this compound when it acts for 24h, 48h or...

07 September 2020 5,361 5 View

Why do I have multiple peaks in my melt curve?

In the primer validation, with the serial dilution of the cDNA, I have a melt curve with a single peak. However, when I do the gene expression using control and treatment samples (I am evaluating...

17 August 2020 2,793 5 View

How to choose the best smooth algorithm for your data in Origin?

I have several curves of applied potential versus electric current with hundreds of points in each of them. I am trying to analyze their first and second derivatives, but they are too noisy to...

27 April 2020 5,932 2 View

How to quantify percentage of DAB positive cells in IHC? Is there any automated tool?

Hi! I'm analyzing some TMA IHC cores using an scoring method that combines intensity and proportion of stained cells. I would like to know if is there any protocol to quantify percentage of DAB...

25 April 2020 479 2 View

Deep Euthetic Solvents, how to prepare?

Hi, everyone. I am starting to work with fractionation of Biomassa by Deep Euthetic Solvents . I came across a DES that is comprised of Lactic acid: Glucose:water (molar ratio 5:1:3), as in ref....

12 March 2020 3,474 3 View

What is the header of the Gaussian input file for calculating two distinct molecules?

I'm doing simulations with two different molecules, but it always ends up falling into the same problem, it seems that the Gaussian doesn't balance the molecules when I calculate the cation and...

03 March 2020 7,750 2 View

Looking for Materials with high thermal expansion coefficient and high temperature resistance?

03 March 2021 8,272 1 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 are anisotropic electrical and optical properties of a semiconductor due to?

In some materials, properties such as band gap, thermal conductivity differ along different crystallographic axes. What are the basics?

01 March 2021 1,923 3 View

1 nm thick MgO thin-film to be deposited on Si wafer using thermal evaporation. What will be the optimum deposition conditions?

Favourable conditions of base pressure, rate of deposition. Also, by which characterisation technique to be used to verify the thickness of the deposited film.

28 February 2021 3,640 3 View

Why do a weight decrease for thermal degradation in nitrogen gas condition?

Hi all The question is related to TGA(Thermogravimetric analysis). Thermal degradation easily understood but why do samples weight decrease? altough just binding is broked, the weight of...

26 February 2021 1,100 5 View

Can thermal cycler machines be problematic during PCR?

Hi, my question is about the heating of thermal cycler machines and I hope some of you had experienced a similar thing previously. There are two thermal cycler machines in the lab(BioRad) and for...

26 February 2021 4,777 4 View

How to increase solubility of Poly acrylic acid in Dioxane solvent?

I am working with Polyacrylic acid (100.000Da) and instead of water, I need to use another solvent (dioxane) to dissolve PAA. However, because of the high molecular weight, it's quite hard to...

25 February 2021 2,225 5 View

Fractional impervious surface (FIS) map ?

Need Help Does anyone Know how to make a Fractional impervious surface (FIS) map from NDVI map, in ArcGIS environment? Thanks in advance

24 February 2021 8,455 2 View

How can I verify my centrifugal fan design for electric motor cooling?

I have radial blade centrifugal fan design which will be mounted on exhaust side of electric traction motor. The fan will be mounted on same motor shaft inside the housing. How can I verify that...

23 February 2021 2,390 3 View

Thermal reduction of graphene oxide.?

I am trying to reduce graphene oxide by thermally but I have no proper information regarding this. Can any one help me regarding the details about temperature and time for the reduction of...

23 February 2021 4,155 4 View