Homogeneous or Heterogeneous sample?

More Viviane Wakim's questions See All

Are there any epidote standards available for ordering/sharing?

Dear colleagues, my team and I are currently working on developing isotopic dating methods in our lab focused on dating faults and set time constraints on the post-rift tectonic events of the...

08 November 2021 1,280 1 View

Do you know data sets including material status and education/occupation before 1870 (country irrelevant)?

Dear all, I am writing about homogamy with respect to socioeconomic status. As I hypothese that the influence of the socioeconomic status of a person declined due to industrial revolution (and...

26 October 2021 5,080 3 View

Can I cite papers I don't have access to?

Many papers are behind a paywall and I can't read them without using tools like SciHub (even my institution login doesn't give access to many papers). I would like to cite some of these papers and...

16 June 2021 3,601 43 View

I tried silver staining of a SDS PAGE gel. My proteins are visible as white bands. What went wrong?

Biorad precast gels Tris-Tricine Loading buffer with Orange G Fixation: 1 h 5 % glutaraldehyde Rinse: 2 x 20', overnight, 1 x 20 ' A. bi dest Sensitization: 0,2 g/L ASA 1' Rinse: 3 x 20...

01 July 2020 6,430 0 View

Flow distribution in prmary surface heat exchanger?

Hello, I am familiar with plate fin heat exchangers, however when it comes to primary surface heat exchangers 5 shown in the figure) I need to know how the flow is distributed from the header to...

23 June 2020 2,531 0 View

SNPs and GRS?

I have genotype of 400 people, only 102 SNPs. There were target for genetics lifestyle report. They are divided between Brazilians and Swiss. My research now is to look at few SNPd and calculate...

04 March 2019 547 3 View

Is a deductive approach enough for analysing qualitative data?

Hello, I have conducted semi-structured interviews and i have the interview transcripts ready. Since my thesis is based on a framework derived from prior literature i will be using a deductive...

28 November 2018 1,251 9 View

Did someone succeed in doing Pax7 staining on paraffin muscle slides?

Hi. I'm trying to do a Pax7 staining on paraffin muscle slides, but until now, it doesn't work well... I have a lot of background.. I know that the staining protocol worked well with OCT tissues....

21 November 2016 3,782 9 View

What is the best way to separate sperm for RNA extraction? Does anybody uses RNA later in the samples?

Hi! I am testing different methods of semen purification, and I would like to know what the best method for isolating sperm cells for RNA extraction. Is it recommended adding RNA later in...

06 October 2015 2,711 3 View

Does anyone has a pdb with the XYZ coordinates from MoS2? Or the .blender file?

Hi, I want to draw a MoS2 monolayer similar to the one attached. I got some tips on how to do it using VMD but I do not know how to write the pdb file with the MoS2 coordinates (XYZ file). Can...

15 February 2015 3,604 6 View

RNA later for the preservation of RNA in fecal samples at room temperature for one day (37°C)?

I am planning to collect human fecal samples for metatranscriptomic analysis using MGI. These samples are from indigenous people living in a region with high temperatures. I will have access to a...

06 August 2024 1,367 3 View

If we are using snowball sampling technique, how do we justify the true representativeness of the sample statistically? is there any statistical test?

Are there any statistical methods to justify your sampling technique using SPSS or AMOS?

05 August 2024 9,153 4 View

What are possible strategies can be used to analyze data under sequential explanatory mixed method approach?

Better ways to analyze the qualitative and quantitative data in a sequential explanatory mixed method approaches

04 August 2024 2,703 6 View

Request a single Lecture notes for math as detailed as this that I can find in one place?

- The Existence/Uniqueness of Solutions to Higher Order Linear Differential Equations - Higher Order Homogenous Differential Equations - Wronskian Determinants of $n$ Functions - Wronskian...

03 August 2024 2,366 0 View

What is the best sampling strategy?

I am conducting a qualitative study that uses interviews to investigate the perceptions of teachers about a particular leadership practice and I am focusing on 3 schools which have a total number...

01 August 2024 8,457 10 View

Why 3 replicates for most biological assays? Is it enough to examine the data fits normal distribution?

Just bounced on me. Before statistically analysing significant difference, shouldn't we see if data fits normal distribution first? Is 3 replicates enough to testify the hypothesis of normal...

31 July 2024 8,141 13 View

Tissue homogenization in mouse with FastPrep-24™ 5G - is the D matrix system useful?

I need to lyse and homogenise mouse tissues. So far I have experimented with liver and lung tissue, using matrix D. The liver was completely lysed with 6 repetitions of the standard program, but...

31 July 2024 9,186 0 View

Request for Advice: Starch Metabolism Research Project?

I am currently considering a research project focusing on a comparative analysis of starch metabolism in orchids and roses. I am particularly interested in identifying the types and quantities of...

30 July 2024 4,267 2 View

Can the limit of quantification (LOQ) of an analytical method fall outside its linear dynamic range, or must it always be within it?

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29 July 2024 7,198 9 View

Pragmatic inquiry research design?

Employing a pragmatic inquiry research design, looking for published research using this method, employing qualitative research data collection methods of semi-structured interview and focus...

28 July 2024 540 2 View

Mariano Ruiz Espejo

I think the sample can be random or not, but homogeneity or heterogeneity is a property of population or its parts (strata, clusters, etc.).

G.M. Monirul Alam

You need to follow random sampling technique for your research. If the respondents are from the same socio-economic background then it is homogeneous otherwise heterogeneous.