Mixture neutralization after Boc deprotection ?

I am performing a Boc-deprotection with HCl in organic solvent (dioxane or Ethylacetate) but would like to isolate the free amine. Several problems: - Neutralizing with inorganic base as NEt3...

18 February 2021 3,366 3 View

How to remove unedited version of the manuscripts from research gate?

Our manuscript was published ahead of print. The edited and revised version is now available. How do I remove the old version of the manuscript from the research gate?

01 February 2021 5,965 1 View

How to prevent false negative FISH results?

I am analyzing data from a FISH experiment and notice that there are false negatives. What is the best option to change in the experimental set up to avoid this from happening?

04 October 2020 5,777 1 View

Clarification on Shapiro-wilk sig. , skewness and kurtosis?

Hello, Maybe is a bit silly question but, I have a variable (N=78) and on shapiro-wilk test the sig. is .008 which is just over (greater) than 0.05 meaning that is just about normally...

29 August 2020 1,384 4 View

How do you analyze a data set with nominal and continuous variables?

I have a couple of datasets that I scraped myself with Python. One is a list of countries with a few figures on how easy they are to work with from a business stand point (days items are in...

28 January 2020 9,278 3 View

How do you average log CFU/ml?

Do you first calculate the average of all the CFU and then sub it into the equation ? OR Do you calculate each individual log CFU/ml and then average that?

19 March 2019 7,956 6 View

What is the general upper detection limit CFU/ml for Enterococcus faecium?

How do you determine the upper detection limit for E. faecium? If there are too many to count on the plate, can I suggest that there are >25,000 CFU/ml for example? - or would that be too much

02 March 2019 1,261 1 View

How do you perform a Mann-Whitney U test when trying to calculate the average CFU/ml?

I have a treated and a control condition of agar plates. I counted the number of colonies and wanted to carry out a mann whitney test. Do I carry out the mann whitney test using the counted...

02 March 2019 4,830 1 View

How do you average log CFU/ml?

Do you first calculate the average of all the CFU and then sub it into the equation ? OR Do you calculate each individual log CFU/ml and then average that?

02 March 2019 1,412 7 View

Do different alcohols disinfectants act on the same mechanisms to kill bacteria?

For example, do isopropanol/1-propanol/ethanol alcohol based hand rubs all use the same mechanisms to kill bacteria? Do they all just disorganize lipid membranes, denature proteins, and...

02 March 2019 8,814 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

Buffer Exchange using column packed with sephadex G-25 effect on protein concentration?

Hello, If i am doing a buffer exchange for an antibody of 1mg/mL, does the elution lose protein in the process of buffer exchange? For example, if i flow through 500 uL of 1mg/mL sample, and...

03 March 2021 6,299 3 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

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03 March 2021 5,360 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

Do I need to strip the PVDF membrane before staining it with colloidal gold?

Dear Colleagues, After running Western blot on PVDF membrane and detection using ECL, I would like to stain my PVDF with colloidal gold to be able to allign the ECL image with total proteins on...

02 March 2021 7,829 3 View

PACYC PCR not working after several attempts. Would anyone have any suggestions?

So, I have been trying to run a pACYC PCR which will be used later on for a Gibson Assembly. However the PCR is not working. I have already tried gradient PCR and changing extension time; however...

02 March 2021 1,146 2 View

Discrete Phase model (DPM) particle break-up has particle size limits during particle tracking?

Hello, I am currently working on simulating water droplet partciles in a closed room. When I use uniform particles, without "particle break-up", I can carry out the simulation without any problem....

02 March 2021 3,053 2 View

How optimize the Size Exclusion Chromatography?

Hello! I'll do a size exclusion chromatography, but I only have an open column, and I'll perform the peptide extraction from yeast, using buffer lysis (sodium phosphate 50 mM/NaCl 30 mM/DNAse and...

01 March 2021 2,215 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