How frequecny of a sound wave is related to its loudness (i.e. dB value)?

Is there any correlation between frequency of sound, and its loudness. Here by 'loudness', I mean what we measure with a sound level meter in terms of dB. If this word 'loudness' is replaced with...

02 March 2016 2,936 2 View

Some of the pigmented bacteria used by us spontaneously loose pigmentation. How can this be solved?

We work with pigmented bacteria like Chromobacterium violaceum, Pesudomonas aeruginosa, etc. Sometime they spontaneously loose the property of pigment production. How can we solve this problem? I...

09 October 2015 898 3 View

What is the molar extinction coefficient of violacein in DMSO at 585 nm?

Violacein is the purple pigment produced by Chromobacterium violaceum.

03 April 2015 5,003 0 View

While quantifying the microbial growth of a pigmented organism, how interference from the pigment can be avoided?

Pigments produced by bacteria do have some absorbance at the wavelengths (e.g. 625 / 660/ 600 nm) which are used for measurement of microbial growth. How can one minimize the interference from...

03 April 2015 8,975 1 View

Can anybody suggest a simple method for estimation of membrane permeability in bacteria and yeast, citing a relevant reference?

We are looking for a simple method which does not require any sophisticated instrumentation. I think there is some method wherein some substance of known molecular weight can be added into the...

06 July 2014 1,664 3 View

Is there a database of microbial pigments?

Is there any database where one can find information on microbial pigments like violacein, prodigiosin, etc.?

01 February 2014 4,289 0 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

What kind of fluid could I use for a pitfall trap that also does not invalidate molecular testing?

Hi, I want to start testing pitfall trap to obtain ants samples, but I need to conduct molecular analysis on those insects. So, what kind of fluid can I use? Ethanol expires too early and I need...

03 March 2021 5,978 5 View

No title

02 March 2021 3,060 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

How to normalise data on OPM package from R Studio ?

Good afternoon, I recently used OmniLog from BIOLOG for my experimentations : I tested the metabolism of different strains on 2 types of plates. I have 16 strains of 3 different groups...

02 March 2021 3,584 1 View