The condition has length > 1 in ifelse in r?

When the condition has length > 1 in ifelse in r and there are more than 2 statements how to use ifelse? I have a data set wherre I want to categorise people in to categories using sveveral...

04 March 2020 4,811 6 View

When we are using already available records, in a retrospective cohort study the sample size calculation to be done in which formula?

I have started a study of record available at clinic collected years back.So it seems to be a retrospective cohort study.But when calculating sample size I feel like it to be done in normal cross...

12 August 2019 866 3 View

What may be the contaminant observed in animal cell culture ?

The following image uploaded is from our Sub-ventricular Zone (SVZ) derived neurosphere culture (mice), Primary culture - Passage 2 - Day 2. Thread like structures were observed at 20X and 40X....

27 June 2018 3,269 10 View

Does Glutamine free medium contain Glutamate?

I want to use glutamate free medium for my experiment but I could not find it. But the glutamine free medium is commercially available and I want to ask whether glutamine free medium contains...

12 June 2018 8,237 3 View

How to preprocess multispectral image with low pixel values in shaded areas?

I have WV 3 image with very low pixel values in the shaded areas. Image covers a very large area and it is very clear. I am trying to do radiometric and atmospheric correction (ENVI FLAASH and...

28 December 2017 5,631 3 View

Can anyone help me to identify this moth to a Species, Genus or Family level?

Size of the specimen - about 20-25mmLocation - Sri LankaCan anyone identify the Species, Genus or Family? Thanks in advance!

11 October 2016 8,000 18 View

Can somebody please inform me about the availability and cost of ELISA kits for measuring rat testosterone, estrogen, progesterone, FSH and LH?

10 July 2014 3,304 3 View

What are the controls for immunoprecipitation that will be excised and sent for MS for protein detection?

My protein is tagged with HA. I plan to use magnetic beads. Can anybody suggest me.

27 June 2013 401 2 View

Two separate bands for PCR products of a same gene on a gel!

Hi Why two different bands appear for PCR products of a same gene, when run them in a same gel, same time (master mix were prepared using same reagents and Cdna). I had quadruplicates in PCR run...

01 January 1970 4,392 3 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

Anyone know of a good progesterone antibody?

I am looking for a good progesterone antibody to quantify levels of progesterone in zebrafish. Applications would be ELISA, and immunohistochemistry.

28 February 2021 5,929 2 View

Can anyone help with Schistosoma identification?

Can anyone identify what kind of Schistosome species this might be? Morphological features of cercariae and adults resemble Trichobilharzia, though I am fairly new to the field of parasitology...

25 February 2021 7,760 6 View

Which polarizers are usually used to measure the birefringence of zebrafish muscles?

I already found several publications on that topic, however, the specifications for the used filters are often missing. Some more specific information than "fish is placed between to polarizing...

23 February 2021 1,934 1 View

Are there SDMs that can take in percentage data?

Hi everyone, I am wondering if anyone knows of a species distribution model that can take in percentage data (i.e. presence data with prevalence values attached to them)? The dataset I have...

18 February 2021 7,312 3 View

What is the significance of (isolated) high titers of IgG anti GD1a antibodies in an older patient with polyneuropathy?

Remote history of Campylobacter infection with reactive arthritis, and Spitz nevus (UMP). Arthropod exposure in Zika/ChikV endemic area prior to emergence of length dependent, sensory PN with...

18 February 2021 8,719 1 View

Is there any free software for behaviour analysis of zebrafish ?

I need to do novel tank test and light/dark test for zebrafish. So I need a tracking software for tracking in these tests. Is there any free softwares available for tracking of zebrafish ?

16 February 2021 1,541 1 View

Where would? can? positive charge(vacancy) be when grounded?

Hello I plasma(H2N2) treated Al2O3 plate (edge is connected to ground) and wondered if oxygen vacancy migration on the plate can occurs as electrons escape through edge. Or whatever positive...

15 February 2021 8,118 1 View

ZnS oxidizes to ZnO!!why??

when I put my ZnS solution in the chemical bath, the ZnS oxidizes so there are ZnO peaks appearing because of the reaction with the oxygen in the air, despite the fact that I close the beaker...

14 February 2021 5,778 9 View

How to prepare OH- terminated Si Wafer?

Hi, Folks. I am working on the ALD project to deposit Al2O3 on the Si wafer from TMA and Water. I have struggled with the preparation of OH- terminated Si wafer. I have both Si(1 0 0) and...

08 February 2021 8,792 2 View