What type of syringe filter is suitable to purify extracted plasma samples for HPLC Analysis?

I would like to ask, which type of syringe filter is suitable to purify extracted plasma samples for HPLC Analysis. Currently, my extraction method involves mixing mice plasma with saline,...

04 May 2018 935 6 View

What type of activated charcoal can be used to purify plasma samples?

I would like to know which brand and what type of activated charcoal or activated carbon (lab grade) that I should use to purify plasma samples from impurities or endogenous compound for HPLC use....

02 March 2018 5,464 0 View

Help with explanation for HPLC validation protocol

I dont quite understand the following and would like to clarify the meaning: 1. For Lower Limit of Quantification (LLOQ), the analyte response at the LLOQ should be at least 5 times the response...

07 August 2017 6,856 5 View

Are there any biodistribution studies using fluorescent cholesterol probe?

I am going to do a biodistribution studies on tocotrienol in vivo. Previously my tocotrienol was tagged with a fluorescent probe. However, I would like to change my approach and using a...

03 April 2017 4,249 0 View

Why does intensity drops as concentration increases?

I am currently doing a fluorescence intensity scan with my compound. I am using the following parameters: Excitation: 273-276nm Slit: 20 Smoothing: 40 As my concentration increases from 20ug/ml...

10 November 2016 7,791 3 View

Can we use clean mice plasma for pharmacokinetic calibration curve?

I would like to know if there is any publication that supports the use of clean mouse plasma (eg. from sigma) to use it as a support for the calibration curve when compared to the PK of a mice...

09 October 2016 8,826 0 View

Why do we include a healthy group for invivo study (animal model)?

05 June 2016 5,439 8 View

What is the difference between spectrofluorometer, fluorescence spectrometer and fluorescence spectrophotometer?

05 June 2016 2,520 0 View

Is this explanation correct?

A powder extract is dissolved in pure DMSO first and diluted with sterile saline (0.9% NaCl) at 50 mg/ml with the final DMSO concentration at 10% Does this mean that the poweder of 50mg is...

06 July 2015 4,487 0 View

Enhanced Yellow Fluorescent Protein (Aequorea victoria) DNA sequence?

I am on the lookout for the Enhanced Yellow Fluorescent Protein (Aequorea victoria) DNA sequence. Does anyone know where I can find it? Thank you in advance

03 March 2021 3,568 1 View

Is There Any Feasible Method To Test Fluorescent Compounds Other Than Fluorescence Spectrometers ??

Is There Any Feasible Method To Test The Efficiency Of Fluorescent Compounds Other Than UV Spectrometers ? Suggestions Would Be Appreciated !

02 March 2021 5,785 3 View

Why might my GFP tag be dissociating from my plasmid after transfection?

I have a set of stably transfected cell lines all transfected with plasmids containing GFP tags on the C terminus. During a western blot using anti-GFP antibody, one of my plasmids has dissociated...

01 March 2021 9,310 4 View

Which fluorescent dye to use for measuring total ROS production?

Is DCFDA appropriate for measuring total ROS production, or can it only detect certain types of ROS? If I want to measure total ROS production, which dye should I use?

01 March 2021 9,447 3 View

How to accurately quantify chitin?

Hi all, I have been working on the quantification of chitin in insect samples and feed for a while but I can notice that the quantification methods (e.g. exposure to HCl, NaOH, and weighing sample...

01 March 2021 1,843 2 View

Can someone suggest a way to prepare slides to observe under confocal microscope for observing fluorescent tagged proteins??

I am growing the cells on coverslips and transfecting the fluorescent tagged protein directly on them. Then i want to observe these cells under confocal microscope. Currently i am just using...

01 March 2021 6,142 3 View

Do you need the CMV enhancer before the CMV promotor for a proper function of CMV on the gene that follows?

I'm a student and I have to produce a cell line with a knockin for the NRF2 gene with GFP. I have to put a promotor in front of the GFP because the gene will be too far away from the promotor of...

28 February 2021 7,127 2 View

Why does intensity drops as concentration increases?

Is there any reason for decrease in fluorescence emission intensity of HSA,BSA when increase the concentration ?

28 February 2021 3,653 4 View

Problem with ligating 2.8 kb insert into 8.5 kb plasmid?

I am trying to clone 2 copies of the same mammalian gene into the pSF-CMV-Ub-Puro Ascl (contains HindIII, KpnI and NheI cut sites) plasmid. This is what the final product is supposed to look like...

24 February 2021 6,310 3 View

Quantifying leaking DNA from bacteria - what's the secret?

Hi, all! I need to determine if my treatment causes membrane damage in bacteria (S. aureus and E. cloacae), but I cannot use a fluorescent probe such as PI and similar ones because my compound is...

24 February 2021 2,006 2 View