Oligonucleotides - NanoDrop Analysis ?

More Manohar Raju's questions See All

6-Mercaptohexanol in DNA biosensor ?

Hi, In most of the DNA biosensor experiments and articles they have used MCH (6-Mercaptohexanol) as a blocking agent, to orient DNA 90o and to remove non-specifically bound from the...

04 May 2019 5,748 1 View

How would i fix a DNA probe concentration for a biosensor ?

Hi all, Am working on a DNA based biosensor, DNA are thiolated. i reduce thiolated ssDNA by TCEP and dip cast it on a gold nanoparticle coated electrode. I have tried with 500nM ,...

02 March 2019 2,832 2 View

Hybridization of Oxidized nucleobase ?

Hi all, What are the possibilities of a oxidized nucleobase, getting paired with the complementary base. does it satisfies Chargaff rule ? Can 8-Oxo-Guanine be paired with Cytosine ?

31 December 2018 799 4 View

Electrochemical DNA Biosensor - LoD and LoB ?

Hi all, How one can calculate the LoD (Limit of detection) and LoB (Limit of Blank) for DNA based biosensor (Label Free). Should one has to take LoB after immobilizing the DNA probe...

31 December 2018 6,061 2 View

Electrochemical Impedance Spectroscopy ?

How do they fit the Randle Sevick's Equivalent circuit for multiple data (Nyquist Plot). Since most of the journals shows a single equivalent circuit representing for multiple nyquist plot .

08 September 2018 5,756 5 View

No X and Y- axis values in CH electrochemical Workstation graphs ?

Hi, Am using Electrochemical workstation 660E, Am not able to get X and Y axis values, have tried from rebooting the system to deleting the regedit includes deleting old data. if someone faced...

05 June 2018 5,523 3 View

Authorship for a Research Work ?

Hi, Most of the Institutes and Research centers has skilled staff who may be just matriculation passed, as they get experienced they would tackle any troubleshoot or problems they face. Most...

05 June 2018 4,952 3 View

How to quantify DNA immobilized on Electrode ?

Hi, Is it possible to quantify the amount of DNA that has been immobilized on the gold electrode ?. How to quantify using EIS/ Chronocoulometry or any other methods.

04 May 2018 9,097 3 View

Gold Nanoparticles Coated on Gold Electrode?

Hi, How difficulty is to remove the AuNp's coated on to the Gold electrode surface, can it be removed completely 100% ? Can one remove the AuNp's by Polishing with Alumina Powder and...

03 April 2018 1,474 3 View

How to perform Association and Dissociation constant, confirmation of Hybridization ?

1.How do i check the Kd (Dissociation Constant) and Ka (Association Constant) in DNA - DNA hybridization. 2.How can i confirm about the DNA-DNA Hybridization by experiments.

01 February 2018 8,971 0 View

Can we distinguish the type of free fluid inside the pelvic and abdominal cavities whether blood or serous fluid using the ultrasound?

during ultrasound examination of acute abdomen, sometimes we see free fluid , can we know the type of fluid ,whether blood or not , using ultrasound only? if yes , what are the sonographic...

01 March 2021 7,476 4 View

How to calculate Ligand-active site distance in a ligand-protein complex from MD simulation?

I have run a MD simulation of a ligand-protein complex in GROMACS using CHARMM forcefield. Reviewer has asked me to calculate Ligand-activesite distance and binding free energy of ligand with...

27 February 2021 4,703 1 View

Is there an open source free software for text mining and sentiment analysis?

I am looking for a free software for text mining and sentiment analysis for my research on customer review mining (it involves calculating polarity of attributes,opinion oriented information...

25 February 2021 1,920 6 View

Which are the journals for free paper publication?

A bunch of flower for everybody. I would like to ask about the list of journals which we can publish our paper for free. Thanks in advance. Sincerely Walid

25 February 2021 9,790 3 View

Suggestions for occupational stress surveys?

I am currently writing a masters thesis on reasons for occupational stress in the early childhood classroom, and want to include a short survey assessing participants work-related stress levels. I...

24 February 2021 8,678 2 View

Is it efficient to do liquid biopsy to investigate the gene expressions of the tumor?

To do liquid biopsy and look for specific gene expressions there are so many published papers. Thera are different protocols and procedures used to isolate circulating cell free RNA or mRNA from...

23 February 2021 7,326 5 View

Hello, does any one know a free medical text dataset?

a free multi label clinical text dataset , containing text as entry and several labels as classes. Best regards

22 February 2021 5,988 2 View

Protocol for membrane extraction E. coli?

Hello! I am interested in determining whether a poly-unsaturated fatty acid I have engineered E. coli to produce is being incorporated into the membrane of the cells or if it is simply a free...

21 February 2021 7,447 2 View

Can anyone recommend which is the best free questionnaire software please?

Hello, I am looking to send out links to an online survey. My previous research project used a paid for survey software. I am now looking for something that's free but straight forward to...

19 February 2021 5,641 3 View

How to obtain free lipids starting from concentration over the CMC?

I need to work with free lipids at increasing concentration (50%, 60% of the CMC ect.). I'm now working with POPC and POPG. To reach these concentrations I have to start from concentration over...

17 February 2021 1,676 3 View

Guobing Xiang

You need OD reading over 0.1 or better over 0.2 for using nanodrop!

If you have an oligo of 25 bases, extinction coefficient will be from about 176000(all C) to 380000(all A). For 100pM concentration, OD is from 176000x100x10(-12) to 380000x100x10(-12), way to low!

You can measure OD of higher concentration and then do dilution, consider the dilution is good enough!

You should use Qubits(fluorescence reading) with dye stain.

Manohar Raju

Guobing Xiang Thanks for your advice.