Should I include censored data into my Log-rank test of Kaplan-Meier curves in JMP?

I am disecting my Kaplan-Meier curves, of four different phenotypes of C. elegans, into first 8 days and last 20 days, in order to analyse in which period there is significant difference in the...

02 March 2016 765 6 View

Which database can I use for synteny analysis of a large collection of bacterial species?

I need to do a synteny analysis of 250 genes, belonging to bacterial species from across the whole kingdom, all of which are part of the same superfamily (of genes). Xbase is currently down, the...

07 August 2015 511 5 View

Is it wrong to use 16s rRNA sequences of strains other than the one you want to include in your phylogenetic tree?

Hi everyone. I am trying to create a phylogenetic tree, however NCBI lacks 16s rRNA sequences for some of the strains I am looking for although it does provide sequences for the other strains of...

07 August 2015 8,766 7 View

Why do E.coli cells, unable to metabolise maltose, turn white on MacConkey agar that is supplied with maltose?

I would like to know what is causing the red colour. Thank you.

02 March 2015 8,786 4 View

Is there a solid molecular understanding of why dipoildy might have been essential for the evolution of multicellularity?

01 February 2015 6,200 8 View

What is the best introductory book on thermodynamics for biologists?

11 December 2014 5,658 3 View

Why are biological membranes amenable to sucrose density gradient centrifugation, but proteins are not?

11 December 2014 526 4 View

What is a good introductory book on game theory with an evolutionary biology overlay?

I am looking for a book that is introductory in terms of mathematics, yet does not hesitate to go into detail after a nice introduction, while advanced on the evolutionary aspect. Thank you.

11 December 2014 5,146 15 View

Is parallel computing, using CUDA, limited to certain softwares/programming platforms?

Hi all, I would like to establish parallel computing by using the GPU of my M2000 Nvidia graphics card. I was wondering if this works for all the softwares, in my case bioinformatics softwares...

01 January 1970 5,598 12 View

MD MOE RMSD

How to calculate the RMSD values for a MD simulation using MOE?

07 August 2021 0 0 View

MD MOE RMSD

How to calculate the RMSD values for a MD simulation using MOE?

07 August 2021 0 0 View

fatal error

When I tried to energy minimization my system, I got fatal error as below. Fatal error: Atomtype opls_116 not found Although I've already added this line: ; include water #include "oplsaa.ff/spc.itp" to [molecultype] directive in my topology.

16 June 2021 0 0 View

fatal error

When I tried to energy minimization my system, I got fatal error as below. Fatal error: Atomtype opls_116 not found Although I've already added this line: ; include water #include "oplsaa.ff/spc.itp" to [molecultype] directive in my topology.

16 June 2021 0 0 View

fatal error

When I tried to energy minimization my system, I got fatal error as below. Fatal error: Atomtype opls_116 not found Although I've already added this line: ; include water #include "oplsaa.ff/spc.itp" to [molecultype] directive in my topology.

16 June 2021 0 0 View

fatal error

When I tried to energy minimization my system, I got fatal error as below. Fatal error: Atomtype opls_116 not found Although I've already added this line: ; include water #include "oplsaa.ff/spc.itp" to [molecultype] directive in my topology.

16 June 2021 0 0 View

Physics: Why do we describe light by referring to its wavelength, but microwaves and radar pulses by referring to their frequency?

In physics, the description of the properties of light generally refers to its wavelength (nm), while in the range of microwaves and radio waves we refer to the frequency of a signal (e.g. kHz or...

03 March 2021 1,682 3 View

Why are the velocities so high in my Boussinesq approximation Fluent simulation?

Hello, I have a mechanism where air rises due to convective flows. In this simulation, nothing is driving the air except this. I understand that the Boussinesq approximation only works for small...

02 March 2021 4,910 3 View

Why almost every element would be metallized in sufficiently high pressure and low temperature?

(This statement is from wikipedia, BTW). What is so special about metallic bond that is limiting high-P low-T state of a matter (as long as individual atoms exist, not white dwarf of neutron star...

02 March 2021 3,309 2 View

How Relativistic effects is one reason for lanthanide contraction?

The Lanthanide contraction which is the decrease in ionic radii of the elements in the lanthanide series from atomic number 57, lanthanum, to 71, lutetium, is due to poor shielding of the 4f...

01 March 2021 2,272 4 View