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

Physics: Why do we describe light by referring to its wavelength, but microwaves and radar pulses by referring to their frequency?

In physics, the description of the properties of light generally refers to its wavelength (nm), while in the range of microwaves and radio waves we refer to the frequency of a signal (e.g. kHz or...

03 March 2021 1,682 3 View

What is the most Operating System (OS) which can be INSTALL on Tiny hard devices like Raspberry Pi (RPi) hardware ?

I'm targeting to deploy a mesh network and manually configure MANET routing protocols. I'm preparing scenarios, architectures, and hard devices needed to do that. Are there some step-by-step...

03 March 2021 1,931 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

Waters 2707 HPLC autosampler problem?

I am using a 2707 waters HPLC device. When I try to inject a sample, it says missing plate or rack. I changed the needle and calibrated its position but I still get the same problem. I even get...

02 March 2021 1,408 1 View

Is there any effect of different colours of light (white, red, yellow, blue etc.) on the rate of photosynthesis? If yes, why?

Light is inevitable for the process of photosynthesis reaction. Naturally sunlight plays the vital role for this process. Light may be of different colours like white, red, yellow, blue etc....

02 March 2021 7,890 2 View

How can I integrate a routing protocol in a tiny device (e.g. Raspberry Pi)?

Hi Community, I'm facing the issue of integration/compiling a new routing protocol in a WSN simulator. The final goal is to successfully add, configure this routing protocol in hardware devices...

01 March 2021 9,332 6 View

What is recommended for solid domain in ANSYS FLUENT?

Should I mesh the solid domain ? or should I use wall thickness? or Shell conduction? for Heat Transfer between two fluids of a Heat Exchanger. what is recommended?

01 March 2021 9,785 3 View

How can i resolve the "final solutuin is not converged" error in Comsol for my heat transfer simulation??

I have been trying to simulate heat transfer problem in Comsol 5.5 for long time but it always throw an error stating: "Failed to find a solution. Maximum number of Newton iterations...

28 February 2021 8,626 3 View

PUC19 as a transfer plasmid for lentiviral delivery?

Hello, Is it possible to use pUC19 as a transfer vector to be packed in using the second generation viral particles packaging system( pMD2.G; psPAX2 plasmids)? As far as I understand it there is...

28 February 2021 4,868 2 View

In an eye with Tyndall, does each dot correspond to an individual cell?

When you observe the presence of Tyndall in an inflamed eye: Does each of the small floating dots correspond to an individual cell or to an aggregate of cells? Does a conventional slit lamp have...

27 February 2021 6,326 2 View