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20 December 2020 7,316 8 View

How do Trichogramma parasitoids find their hosts?

I am planing an experiment to investigate the dispersion ability of Trichogramma dendrolimi under semi-field conditions. As far as I know Trichogramma uses kairomones for host finding but are...

29 June 2020 4,262 1 View

Is r-square=0.41 adequate to explain the amount of variance of the dependent variable in a regression model?

Provided that my model is well-fit and correctly classifies 77% of the cases with sensitivity, specificity, positive predictive value, and negative predictive value of 65%, 58%, 61%, and 62%...

01 December 2019 9,715 3 View

Where does the rationale on using AQL 2.5 and 4.0 standards come from?

I'm currently dealing with really large # of samples and want to set my AQL. So far, I've only seen these two as common standards for major and minor nonconformities, respectively. May I ask if...

19 August 2019 4,037 3 View

DNA Concentration and Yield?

I am trying to verify DNA concentrations from a spectrophotometer, and then calculate yield. I took 2uL of DNA+Buffer solution (total sample volume = 100 uL) and added that to 98uL of water to...

28 February 2018 156 12 View

Which is a better microscope for imaging yeast mitochondria, also to measure FRAP - Olympus FV1000 MPE, Leica SP8 or spinning disk?

03 April 2017 7,557 2 View

What is the most accurate method to measure yeast MnSOD?

I need to measure the MnSOD enzyme activity in yeast mitochondria. I know that that the IMS contains some Cu/Zn isozyme but I am interested in the MnSOD (which is in the mit. matrix). I have not...

12 September 2016 4,168 2 View

Negative side of social support - parents of children with difficulties

Hi everyone, I am interested to find articles that talk about negative effect that support might have on a parent with developmentally chalenged child (e.g. giving advice when not asked for,...

01 January 1970 709 6 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

Gel electrophoresis result for total RNA samples, 1.5 Agarose gel was used, How to improve the integrity of RNA?

Gel electrophoresis, RNA degradation, RNA extraction from fresh tissue

02 March 2021 5,433 5 View

Is it possible for two human neuronal cell lines to have different gene sequence for the same protein?

I am looking at the ATP1A2 (Sodium/Potassium ATPase alpha subunit 2) in two human neuronal cell lines. Expression levels of this protein seems to be almost equal when detected by one antibody....

01 March 2021 3,607 3 View

Problem with shRNA transfection. Why are only two plates getting contaminated instead of all?

I transfected my LNCaP-WT cells with 3 shRNA plus their NTC two weeks ago and split two puromycin selected cell plates on Friday last week(Feb 26). I checked for GFP in the cells, and they all...

28 February 2021 4,949 3 View

Any specific pipeline or parameter to analyse total transcriptomics study of brain tissue samples?

I have two groups of brain samples, control and treated for example. It was total RNA nova seq sequencing. I tried all the available pipeline like: star+rsem+deseq2, Hista+stringtie+cuffdiff,...

27 February 2021 356 6 View

Why is the efficiency of viral mRNA electroporation in PBMC low?

Hello, I have been struggling with the electroporation of PBMC with HIV-I mRNA. Although the quality of the RNA generated is good, and the handling of the cells in meticulous, the frequency of...

27 February 2021 9,233 3 View

Runs of nucleotides in Sanger sequencing?

I performed site directed mutagenesis, transformation, and then I sent out plasmids for Sanger sequencing and found out that there is extension of DNA just before the stop codon. I am not sure...

27 February 2021 547 3 View

Has anyone used the Illumina ITS1 primer sets?

Hi everyone, Illumina provides a list of primers to amplify with high taxonomic coverage the ITS1 region for further fungal sequencing, but I cannot find the exact amount necessary of each...

25 February 2021 6,969 3 View

Errors in DNA sequences?

I am trying to better understand the scope of DNA replication and sequencing errors, e.g. 1. I have seen similar error rates of 10e4 to 10e5 for cell & instrumental DNA replication,...

24 February 2021 4,397 3 View

What is the best concentration of cDNA to be used for qPCR?

I have synthesised cDNA from 500ng/ul of RNA. The concentration of the cDNA Is about 5000ng/ul. Should I dilute my cDNA or just use it as it is for my qPCR? I usually use 2ul of cDNA for a 20ul...

24 February 2021 8,618 3 View