How to dissolve cross-linked Amberlite IRC120 H, hydrogen form resin?

Hello all, I have used Amberlite IRC120 H, hydrogen form acidic cation-exchange resin for the ion-exchange of waterglass [sodium silicate solution -- 40% Sodium silicate (mol ratio > 3.2)...

21 February 2021 5,614 3 View

What molecules bind to dsDNA?

Hello, there are some molecules that bind to double-stranded DNA; for instance, SYBR green and some antibodies. Are there more examples? Thank you

25 January 2021 7,595 4 View

What are best conditions for in vitro hybridization?

Hello, I would like to hybridize a probe and an anti-probe (ssDNA oligonucleotides) in a reaction vessel. What would be the best buffer to use? and the temperature of annealing? Thank you

06 December 2020 4,121 0 View

Which is the best statistical approach to an experimental measurement?

Hi everyone, my question is the following. I have to perform an experiment with the aim of finding a correlation between a quantity X (e. g. temperature) and a quantity Y (depending on X). Which...

06 October 2020 3,911 6 View

How to activate polystyrene with carboxyl group?

Is there a simple (that is one that requires few and not very exotic reagents) chemical reaction to "activate" or "functionalize" the polystyrene of a simple microtitre plate? In other words, I...

06 September 2020 233 3 View

What is the stability of EDAC in aqueous solution?

06 September 2020 4,305 3 View

What test to compare shannon index results?

Hello, I have obtained the following Shannon indices from a trio of samples: 27.73 (healthy tissues), 24.55 (primary colon tumor), and 1.20 (metastatic tissues). The indices have been obtained...

30 August 2020 5,543 1 View

What is the concentration of acid for an ELISA stop solution?

Hello, what is the correct molarity of a stop solution for a peroxidase using o-Phenylenediamine dihydrochloride (OPD)? I am getting all sorts of molarities, from fractional up to 3 M according to...

01 July 2020 3,729 1 View

Is there a database for bacterial features?

Hello, is there a repository of the basic characteristics of bacteria, such as maximum growth rate? In the works related to the modelling of bacterial growth, the parameters requested are always...

25 February 2020 5,498 2 View

Can the PCR fail to amplify high loads of target?

Hello, I did the PCR (long-range, target ~5 Kb) that is shown in the attached file. The lanes are: 1. ladder 2. target (plasmid purified from E. coli after transfection), 50 ng/uL corresponding to...

18 February 2020 6,863 3 View

Why do my MCFs not form monolayer?

Hello, I am looking for some expertise on culturing MCF7s. I purchased them from ATCC and I have been following all media and culture conditions. Media is EMEM with 10% FBS and 10ug/mL of...

27 February 2021 3,904 2 View

Is RD-ES grow attached or in suspension or both?

We have a old RD-ES cell line which is grow attached, but we got another vial of RD-ES which is very easy to get detached and grow in sphere in the medium. Do you know which morphology is normal...

24 February 2021 5,183 1 View

What lysis buffer is compatible with Bradford assay?

Hello! I am planning to use Bradford assay to measure protein content in PBMCs lysates. The problem is that Bradford assay doesn't seem to be compatible with Tris-based buffers or SDS. Are there...

10 February 2021 1,797 5 View

Calculating the CFU?

i am constructing research for the antibacterial activity of the medication and I am testing it by %RCC, so my Q after I did 10 serial dilutions for the bacterial suspension can we do plating for...

04 February 2021 5,886 1 View

How to de-clump HEK293 suspension cells?

I have a problem with clumping of HEK293 suspension cells, and this clumping problem decreases the cell viability. I will transfect the cells if I were to reach a favorable cell count. What can I...

17 January 2021 354 4 View

Mammosphere staining protocol?

Hello, does anyone have or can suggest a reliable protocol for immunofluorescent staining of mamospheres grown in suspension at low-attachement plates? Thanks in advance! Best, Theo

13 January 2021 9,941 1 View

Does anybody have the recipe for making a home made R electroporation buffer for Neon transfection systems?

I tried the recipes below in two cells lines: 1.DPBS 2.DPBS+MgCl2(1mM) 3.DPBS+Sucrose(250mM) 4.DPBS+MgCl2(1mM)+Sucrose(250mM) 5.R Buffer (Neon) the results showed that R buffer is the best one in...

06 January 2021 6,776 1 View

In a microgel-DTPA suspension (in water), what can be added as a counter to TMEDA to adjust its pH to 6?

I have added a little extra TMEDA to the microgel-DTPA suspension and has reduced its pH. How can I bring it to pH 6?

04 January 2021 6,743 1 View

How to calculate "POWER LAW" in rheology from a GRAPH of shear rate vs viscosity for cellulose nanofibrils suspensions?

How to calculate "POWER LAW" in rheology from a GRAPH of shear rate vs viscosity for cellulose nanofibrils suspensions?

02 January 2021 6,816 3 View

How do I know if my E.coli cells are fully lysed from sonication ?

Hi everyone, I am doing protein expression via E.coli. I am required to lyse the e.coli cells via sonication to obtain cell lysate. I normally sonicate 1L cell pellet suspended in salt buffer at...

22 December 2020 9,675 7 View