Vijay Kothari

7 Questions 21 Answers 0 Followers

Questions related from Vijay Kothari

Can anyone suggest on availability of any automated systme for counting C. elegans?

Is there any automated system available for counting live vs. dead Caenorhabditis elegans? Microscopic counting is bit tedious and error-prone. MTT assay has been described in literature for...

03 March 2017 6,064 2 View

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...

03 March 2016 3,005 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...

10 October 2015 973 3 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...

04 April 2015 9,076 1 View

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

Violacein is the purple pigment produced by Chromobacterium violaceum.

04 April 2015 5,095 0 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...

07 July 2014 1,740 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.?

02 February 2014 4,372 0 View