Precipitate after adding laemmli buffer to protein solution containing Potassium Acetate?

Hi, I am running a size exclusion chromatography experiment with a buffer containing Potassium Acetate as a salt. I analyse these fractions through SDS-PAGE. After boiling my SEC fractions in...

01 March 2021 2,622 3 View

Handheld Portable Raman spectroscopy systems - recommendations and experience?

Hi all, I am looking for some general feedback and information from those that have experience using handheld/portable systems? I am looking at the prospects of using an off the shelf system from...

07 February 2021 9,691 3 View

How to reverse unit direction of odds ratios for meta-analysis?

Dear all, I am trying to figure out how to convert odds ratio per unit decrease into beta value per unit increase. E.g. OR = 2.3 per 1 mg/dL decrease -> Beta = x per 1 mg/dL increase. I am...

02 December 2020 7,467 3 View

How to prevent protein aggregation in gel filtration (size exclusion) column ?

I am currently trying to run solubilised mitochondria extracts from mammalian cells through a gel filtration column in order to separate proteins by size & visualise protein complexes. My...

29 November 2020 1,483 5 View

GAMM time course analysis: Can you explain why a sig difference is indicated via Parametric coefficients, but smooth term does not improve model fit?

Hello, I have a couple of years experience with GAMMs and I have run several complex models that have shown some really nice time course effects - well controlled structures too. In a new study,...

02 November 2020 9,810 1 View

Am I introducing any potential loss of RNA integrity by combining an RNALater solution with a non-ionic detergent?

I am planning to characterise the transcriptome of pre-anthesis kiwifruit anthers. The samples are being harvested on my behalf and sent down by post, and I cannot ask the harvesters to dissect...

10 October 2020 1,830 3 View

How to best purify an amorphous polymer?

Hi all, I am struggling to purify a series of polyesters which do not have melting points. That is to say, they do not nicely precipitate in non-solvents and instead form highly viscous gels. I...

15 July 2019 8,066 4 View

Has anyone had this issue with their stain free gels?

After many tries, the bottom of the lanes are being distorted, as seen in the attached image. These are 12% stain-free gels with a colour protein standard ladder. Thanks for the help!

09 July 2019 923 2 View

Why do perchlorate salts crystallise so well?

I am currently undertaking my Masters degree and my supervisor asked me to synthesise a Schiff-base macrocycle via a metal template method. There is a lot of publish literature out there relating...

05 March 2019 7,436 3 View

Does MIF-1, melanocyte inhibiting factor or melanostatin have any effects on skin pigmentation when injected into it?

Most research papers I found only studied its effects on depression and Parkinson's disease rather than its ability to treat hyperpigmentation of the skin. I am beginning to this that it may be...

27 March 2018 1,905 1 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

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

Shall I skip the measurement model in SmartPLS?

Hello everyone, I had run a mediation model in SmartPLS using questionnaires that were already validated among my statistical population. A professor who edited my paper -though she is not...

01 March 2021 3,052 3 View

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01 March 2021 3,905 5 View

What test should I use to compare two or three means, if data is not normally distributed but sample size is > 30 in each group?

I personally feel this as a most confusing question. As per my understanding, if sample size is > 30, and sample is skewed, we can still use paramteric approach, as it will follow Z...

01 March 2021 1,587 6 View

Is it necessary to report effect size (ES) in statistics of biomedical research given that we already report p values routinely?

Pls share your thoughts

01 March 2021 7,330 4 View

Where to find data on trees in tropical agroforestry?

Hi, I'm looking for data (mainly related to management: growth rate, canopy size, soil and climate preferences, etc.) about tropical trees used in tropical agroforestry. Have you ever heard about...

28 February 2021 7,356 8 View

Does RNAiMAX transfection reagent work in serum free medium?

I diluted siRNA and RNAiMAX in opti-MEM and added to the cells which they were in the growth medium. Is it a right way? or should I culture cells in the opti-MEM medium for a while and not in...

26 February 2021 10,041 3 View

How do I transfect a large plasmid into PC12 cells with nerve growth factor (NGF) receptor?

I have a large 16 kb plasmid, which I need to transfect into PC12 cells. Lipofectamin 2000 didn't work and with GFP alone the transfection rate is very low. I also tried the neon invitrogen...

25 February 2021 6,635 5 View

Why there are two peaks while using the mie plot of Silver nanoparticle?

Hi, I am trying to learn the theoretical modelling of silver nanoparticle using the Mie scattering theory. After that, I discovered a software named Mieplot developed by Philip Laven, where it...

25 February 2021 7,493 6 View