How to solve carry-over and interference problem when detecting tulathromycin by LCMS?

I am working on the determination of tulathromycin in rat faeces using QE-focus (Thermo Fisher)(Waters BEH C18, 2.1x100mm, 1.7um)(0.1%FA+H2O, 0.1%FA+ACN) . I encountered two tricky problems....

02 January 2021 2,713 5 View

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21 October 2020 7,860 3 View

Can anyone share image dataset of food such as cheese, fruits, one object per photo?

I need a dataset of food items. Prefer one object per photo. Any hints are helpful.

05 October 2020 536 5 View

Electropolymeriztaion to synthesis polymer film. But it is too thin, what to do?

Hey guys, these days I am using electropolymerization to form polymer film. I mimiced the procedure of the paper, and got very thin membrane (~hundreds of nanometer), while the paper says they...

24 August 2020 3,379 7 View

Is there a gentle method to reduce cuprous oxide to copper while maintaining the original morphology?

Hello, Recently, I have synthesized some cuprous oxide nanomaterials and want to reduce them to metal while maintaining the morphology. Is there a way to do this?

04 August 2020 4,850 3 View

What is the best way to register crop point clouds and spectral information in a plot of the field ?

Hi everyone, The goal: i want to register crop point clouds and spectral information in a plot of the field. The data detail: 1.The crop point clouds will be obtained by terrestrial Lidar (or UAV...

05 July 2020 9,128 5 View

The collagen gel evaporate with 3D organoid model (air Liquid interface method), why?

Hi, guys, I have a queation, please help me. I used air liquid interface method to do 3D culture. This is the first time to do it. the collagen gel prepared according to literature, 8 vol of...

13 May 2020 7,288 2 View

Can someone recommend me how to plot such pie chart for analyzing antibody germline usage and somatic hypermutations?

I would like to analyze the germline usage and somatic hypermutations of a large number of antibody sequences, can somebody recommend a software or R package to generate such pie chart plot...

28 March 2020 9,574 2 View

How often to get more loci/SNPs from reference based compare to de novo in RADSeq?

Hi, I have this simple but wired question that how many of you ever compared the results of the same data set using both reference-based and de novo approach, and get more loci/SNPs using the...

16 February 2020 9,641 4 View

Can pramipexole be used instead of apomorphine for the verification of 6-hydroxydopamine induced Parkinson's disease mice model?

since apomorphine is not availble, and pramipexole and apomorphine are both dopamine receptor agonists, so I'm wondering if I can use other dopamine receptor agonists to verify the rotation test...

08 January 2020 152 3 View

Polymer composites suddenly solidifies?

I am making polymer composite by solvent mixing method. When I am trying to add filler solution in polymer solution it quickly get solidified. How to make them then uinform? It doesn't give time...

03 March 2021 7,540 4 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

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

How do I determine the degree of polymerization of PEG 400 based on NMR integration?

Hello, I am working on the photocatalytic degradation of PEG 400. I would like to know if it's possible to determine the degree on polymerization based on NMR integration, or by the MW of the...

02 March 2021 6,186 3 View

How to polymerize TEOS?

I want to polymerize TEOS on a surface. I know that NH4OH is a preferred catalyst and an alcoholic solvent should be used .But I can not find certain amounts of each material to use. Does any one...

02 March 2021 1,404 6 View

Sutter electrode holder leaking after applying positive pressure. How to fix?

I am using a Sutter electrode holder for my patch clamp experiments, but I'm having trouble keeping positive pressure inside my electrode due to a leak out of the back of the holder. I have added...

02 March 2021 5,829 1 View

What thickness need for ITO to use as conductive layer?

I want to do RF sputtering of ITO on glass substrate using magnetron sputtering. what thickness do i need to make it good conductive layer to use it for PSC. Moreover, whats about thickness of...

01 March 2021 395 3 View

How to check the uv-vis absorption of nanoparticle by surface plasmon resonance?

I try to check the uv-vis absorption of Indium nanoparticle. Now I am measuring in solution, can I measure it in the form of a film?

01 March 2021 930 3 View

Can polymer concentrations be calculated based on the number average molecular weight?

Hello, I spin-cast two different polymers onto wafers and measure their height as a function of initial concentration. For polymer A, I have the weight-average molecular weight (Mw) as well as...

28 February 2021 7,882 2 View

1 nm thick MgO thin-film to be deposited on Si wafer using thermal evaporation. What will be the optimum deposition conditions?

Favourable conditions of base pressure, rate of deposition. Also, by which characterisation technique to be used to verify the thickness of the deposited film.

28 February 2021 3,640 3 View