Soil sample packaging?

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Can cosine of solar zenith angle be negative?

I am trying to find the cosine of sun elevation angle on slope terrain, I found the values between -0.9 to 0.9. Should the value be set to 0 - 0.9 or the negative value acceptable?

24 December 2020 4,027 4 View

Interpretation of Probit in Propensity Score Matching (PSM)?

Is it necessary to interpret the results of Probit while using Propensity Score Matching (PSM) for impact evaluation?

30 November 2020 8,796 1 View

Exergy destruction mathematical calculation in kW?

somebody, please elaborate on how to calculate exergy destruction in kW units. from Aspen HYSYS I found mass exergy with kJ/kg unit and i don't know how to calculate it by using Aspen HYSYS and if...

25 November 2020 2,675 3 View

How to coat oleic acid on fe3o4 nanoparticles and yo confirm visually?

I made iron oxide nanoparticles via co-precipitation method and obtained a brown colour slurry with neutral pH and I did ex situ coating of oleic acid on nanoparticles and washed it with ethanol...

10 November 2020 5,911 4 View

How to get labels from synthetic dataset?

I have synthetic dataset, but I don't how to get labels from this dataset. Need helpful suggestions and advices. Thanks a lot in advance.

10 November 2020 5,167 3 View

How to confirm coating of oleic acid without using any XRD,SEM,FTIR???

I made iron oxide nanoparticles via co-precipitation method and obtained a brown colour slurry with neutral pH and I did ex situ coating of oleic acid on nanoparticles and washed it with ethanol...

28 October 2020 1,802 3 View

What is the Minimum Sample size requirement for EFA? I have 8 variables (56 Items)...Thanks?

I am working on validating Multi-Dimensional scale, total variables are 8 with total 56 items, how much sample size is required to run Exploratory factor analysis?

10 October 2020 298 6 View

Can SDS breaks protein dimer formed by H-bonding with protein:SDS ratio of 4:1 ?

I am doing SDS-gel non-reducing for protein sample. Sample preparation include mixing LDS sample buffer (similar to SDS) with protein sample in 1:4 ratio followed by heating at 80 degrees for 10...

26 August 2020 2,660 3 View

How to determine sample size?

Hello friends, I have one question. I am writing my Thesis and want to measure the acceptance of environementally friendly passenger transport modes amoung students in a small city. Lets say my...

25 July 2020 3,541 4 View

Why the magnitude of the coeffecients of the following regression model are very large?

Hello dear friends! I am looking for the long relationships between exchange rate fluctuations and balance of payments. I have time series data for the variables of the model. Variables are...

06 March 2020 4,075 3 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

Enhanced Yellow Fluorescent Protein (Aequorea victoria) DNA sequence?

I am on the lookout for the Enhanced Yellow Fluorescent Protein (Aequorea victoria) DNA sequence. Does anyone know where I can find it? Thank you in advance

03 March 2021 3,568 1 View

What kind of fluid could I use for a pitfall trap that also does not invalidate molecular testing?

Hi, I want to start testing pitfall trap to obtain ants samples, but I need to conduct molecular analysis on those insects. So, what kind of fluid can I use? Ethanol expires too early and I need...

03 March 2021 5,978 5 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

Do we need to write protocol for a second study of a systematic review that has been registered and published?

I have conducted and published a systematic review and meta-analysis research with the topic related to public health and health pomotion (protocol was registed in PROSPERO). Now we want to...

03 March 2021 8,920 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

How the parameters (such as Mw, Chemical bonds, polymer bland and so on) affect the mechanic property of polymer (such as storage, loss modulus) ?

Anyone can recommend any books on such topics? Thanks in advance.

02 March 2021 8,457 2 View

Do I need to do linear regression before running mediation analysis using PROCESS MACRO by Hayes ?

I just wanted to check if I need to run a linear regression separately if I am using PROCESS MACRO to run mediation analysis. Thank you.

02 March 2021 4,359 3 View

How to normalise data on OPM package from R Studio ?

Good afternoon, I recently used OmniLog from BIOLOG for my experimentations : I tested the metabolism of different strains on 2 types of plates. I have 16 strains of 3 different groups...

02 March 2021 3,584 1 View

Sample dilution for quantitative analysis using ELISA?

If the detection range is in ng/ml but the reference range is in ug/ml for a molecule or protein in serum or plasma .how to dilute and what is the initial volume to be taken for quantitative analysis

02 March 2021 7,670 3 View