Which is a preferred buffer for Laccase assay using guaiacol as a substrate?

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What is the composition of TM buffer used for concentrating bacteriophage?

Hello everyone, I have to isolate DNA from Brucella phage , but before that, I have to concentrate the phage using PEG 8000. I have got protocol for concentrating the phage using PEG and TM buffer...

24 January 2021 2,767 6 View

How to interpret the result of agar well diffusion assay using herbal extract?

I performed the antibacterial activity of isolated herbal extract against Rhodococcus equi and used Erythromycin as a standard drug, ZOI of the plant extracts were 16-20mm and Erythromycin was 28...

17 January 2021 1,746 3 View

Do all the mRNAs of pox virus are polyadenylated at 3' end?

Hello everyone, In eukaryotic cells, all the mRNAS are polyadenylated at 3' end. I want to ask whether this is the same case for pox viruses also. Do all their mRNAs are polyadenylated at 3'end...

03 May 2019 9,433 2 View

Carried out catalse assay (OD/Time) finding problem in calculations?

i used 3 ml total Rxn volume ,15mM 30 % H2o2, 0.1 ml enzyme extract how to calculate Unit/ml FW? and how to present the data Attaching file of my readings

08 December 2018 2,198 3 View

Green synthesis from the plant extracts?

I want to prepare Nanoparticals from the plant extracts (Family Asteraceae) so i want to know the criteria of selection for different metal Nanoparticals for my plant extracts. In some previous...

29 June 2018 4,005 14 View

Is there any effect of acids,bases on the activities and properties of polyphenols?

Do polyphenols behave differently on interaction with acids and bases?If yes what are the possible changes in the properties?

15 May 2018 1,543 3 View

Could someone help me to do the hydrogen gas quantification calculations detected in TCD?

Please provide your valuable answer.

11 May 2018 7,521 5 View

RBC contamination in WBC pellet during DNA isolation from blood?

Hello everyone, I isolated DNA from freshly taken Human blood but during processing I was getting RBC contamination in pellet .I washed with RBC lysis buffer 6-7 times followed by...

16 October 2017 7,608 3 View

Why carcinoma cell lines (e.g. HepG2, Caco-2, RAW) are used in invitro cytotoxicity experiments?

HepG2 is considered as a model system for various cytotoxicity experiments according to many studies. Won't it produce wrong results if carcinoma cells have been used for such studies as such...

21 August 2017 5,310 7 View

Is there any standard criterion to select optimum number of sequence candidates for establishing a phylogeny tree in bacteria using MEGA?

for example, in case of 16s rRNA nBLAST results, I have almost 80 similar sequences with % similarity ranging from 99% and going down till 94% ?

16 March 2017 4,772 2 View

Buffer to disrupt platelet alpha granules for PF4 quantification?

Hello! I want to quantify by ELISA the secreted (from platelets poor plasma) and the non-secreted (from platelet lysate) PF4 before and after TRAP stimulation. I will use the ELISA from R&D...

03 March 2021 1,499 2 View

Buffer Exchange using column packed with sephadex G-25 effect on protein concentration?

Hello, If i am doing a buffer exchange for an antibody of 1mg/mL, does the elution lose protein in the process of buffer exchange? For example, if i flow through 500 uL of 1mg/mL sample, and...

03 March 2021 6,299 3 View

How optimize the Size Exclusion Chromatography?

Hello! I'll do a size exclusion chromatography, but I only have an open column, and I'll perform the peptide extraction from yeast, using buffer lysis (sodium phosphate 50 mM/NaCl 30 mM/DNAse and...

01 March 2021 2,215 2 View

Why are my bands weird in this Agarose gel?

Can someone please give me some possible things that could go wrong? Here is my recipe: 0.5g Agarose 50 mL of TAE 1x 1 uL ethyl bromide. Gel was run at 100V for 1 hour. The buffer used is also TAE.

01 March 2021 9,952 3 View

What do I do with DLS peaks that are from the buffer?

I'm looking at the aggregation of my protein sample using DLS. Unfortunately, my buffer (20mM HEPES) also results in a set of peaks. These are at approximately 1 and 1000 d.nm. The lowest peak...

01 March 2021 9,015 2 View

What is the most suitable resuspension buffer for TCA/acetone precipitated protein?

I need to extract protein from fermented carbon sources for Bradford assay. Most researchers experiencing insolubility of pellet in resuspension buffer. Please assist me to select most suitable...

26 February 2021 7,129 3 View

What urea buffer can i use for biotagged protein extraction from streptavidin beads?

Hi all, I have been doing research on biotagged LDB1 proteins in Mel cells. I purify the proteins using M280 streptavidin beads. The yield is very low so I've been trying to optimize it by...

24 February 2021 5,749 3 View

Cloudy/high background western blot - can anyone help me?

Hi everyone! I try to detect VDR protein (~48 kDa) using Western Blot. After SDS-PAGE using 10% MP TGX Stain-Free Gel from BioRad I transferred the protein onto an metOH activated PVDF membrane...

23 February 2021 6,266 3 View

How to improve the buffer capacity of sea water?

Hello everyone I would like to improve the buffer capacity of seawater (pH ~8) in order to dissolve as much CO2 as possible without dropping the pH below 7.5 (a range between 7 - 7.5 is...

17 February 2021 2,797 2 View

Why does flow deformation occur at the test line and control line on nitrocellulose membranes (LFIA)?

I use 1% BSA in 10 mM phosphate buffer (pH 7.4) solution when striping my nitrocellulose membranes with antigens and antibodies. However, I always observe deformed flow when my sample or running...

16 February 2021 4,224 3 View