What are some common oxidants used to oxidize iron sulfur clusters in proteins for techniques like EPR?

I have used potassium ferricyanide (which is likely the most common) extensively in the past, but I am curious to know if there are other oxidants that work well. I need to generate the oxidized...

29 January 2021 9,803 4 View

What species (or genus even) of crab is this (bivalve using hermit type)?

Two weeks ago I found a peculiar crab in the intertidal zone in SW Florida. when found, the crab was not utilizing a shell. It was similar shaped to porcelain crabs found in our area, but with...

17 January 2021 1,620 4 View

Lipoic acid with a terminal amine causing gelation?

I am wondering if anyone has made Lipoic acid with a terminal amine and has seen gelation? Is there anyway around this or a way to get it back into solution?

29 October 2020 2,839 1 View

Alpha Reliability for dichotomous nominal data?

I am trying to run alpha reliability tests in SPSS on 4 questionnaires I have used. Questionnaires which have ordinal data/items is fine but I have questionnaires/questions/scales in which the...

18 August 2020 8,426 6 View

How to extract the time interval between different species visits from camera traps?

How can I use R to extract the time interval between visits of different species from camera trap images? For example, Species A arrives at 07:00 (6 photos, each 1 min apart) Species B arrives at...

14 July 2020 3,155 5 View

In an SDS-PAGE is it necessary to include a sample sample buffer and a protein MW standard?

I am trying to run an SDS-PAGE gel to find a apolipoproteinB-100 which is 550kDa. I found a few papers that referenced Laemmli's SDS-PAGE protocol and it says that the protein sample, the sample...

12 June 2018 3,367 3 View

Is there a general coordinate invariant proof of the divergence theorem using tensor framework?

Does anyone know of a valid reference highlighting the proof of the divergence theorem in a strictly coordinate invariant tensor framework? Kellogg is probably the most frequently sited source,...

17 November 2017 7,230 3 View

Multiple imputation error "no missing values to impute" using SPSS

12 July 2017 5,650 5 View

How can I obtain an OOB error/prediction error when using conditional forest and the variable importance function in the party package?

I know how to obtain the OOB error when using randomForests, but I am using cforest and varimp function in the 'party' package and can't figure out how to get the OOB error/prediction error.

29 March 2016 8,520 2 View

How do I separate fibroblast feeder layer cells from co-cultured adherent tumor cells?

What standard techniques are used to separate cancer cell line cells from fibroblast feeder layer cells after they have been grown in co-culture?

23 September 2015 4,931 7 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

Binary Logistic Generalized Linear Mixed model in SPSS. Is it doable?

I want to analyses the proportion of swimming sperm of three species of fish in two salinities. To analyse the proportion of swimming sperm in a Generalized Linear Model, I would use a Binary...

03 March 2021 2,297 3 View

Dear all, I was wondering if anyone knows whether MGLtools and Autodock can run on Mac OS?

I have tried to download the 64-bit version of MGLtools however, as many times as I have downloaded and uninstall the programs, an error arises that the app needs to be updated. Thank you.

03 March 2021 5,997 2 View

Does the pressure(-600 mmHg) affects pH?

When I conducted the degassing experiment using decompression under anaerobic condition(and I used ferrous based chelating agent), the oxidized ferric were observerd. So, could you tell me the...

03 March 2021 4,892 5 View

Why can't make aluminum nitride film successfully by use sputter?

We use reactive sputtering process to make aluminum nitride film, and want to make c-axis aluminum nitride film on a silicon substrate, but the crystal orientation cannot be seen with...

03 March 2021 7,975 3 View

What test should i use in comparing the correlation between categorical and continuous variables?

Dear all, I have the variable (Surgery duration) represented by values in minutes and the variable (preoperative neuropraxia cases) represented as (Yes/No) values. I want to compare these two...

03 March 2021 5,427 5 View

I got 02 moderator values defining Johnson-Neyman significance regions. Is it an error?

Hi everyone, I am conducting research for my Master's thesis. I am using PROCESS by Johnson-Neyman to analyze my Moderator model. I test the relationship between Public Service Motivation and...

03 March 2021 2,350 2 View

Logistical regression using SPSS for a dichotomous dependent variable, with an independent variable of 1, 2, 5 and 10 seconds?

I have an experiment with 28 participants The independent variable is the times 1, 2, 5, and 10 used as the cross hairs during a task These 4 times were tested using 4 different blocks, each...

03 March 2021 9,692 2 View

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03 March 2021 5,360 2 View

How to find the mean, SD and CI in SPSS?

Hi, I hope that someone can help me with this task: I have 5 groups of participants which are numbered in SPSS from 1 to 5 (according to their group number) and are all under the variable group....

03 March 2021 506 3 View