Igor Brown

12 Questions 46 Answers 0 Followers

Questions related from Igor Brown

What is an optimal/correct wavelength to measure the density of cyanobacterial cultures?

I was taught a long time ago that the optical density of CB cultures can be monitored with the help of a spectrophotometer at a specific wavelength, usually around 750nm. However, I found recently...

20 October 2024 5,193 0 View

Does some one has PDF file of this article?

Dear colleagues, especially from India - Could you please share PDF file of this article: KOMAREKJ,. (1972). Reproduction process and taxonomy of unicellular endosporine blue-green algae. In...

09 September 2023 6,238 4 View

Why lunar simulants JSC-1 and JSC-1A contain about 3% of ferric oxide?

Hi, Could somebody please explain to me why lunar "soil" simulants JSC-1 and JSC-1A contain about 3% of ferric oxide while real lunar regolith do not have any ferric iron? Thank you, Igor Brown, PhD

27 May 2023 5,547 3 View

Does DNA extraction procedure completely denaturate (kill) all bacterial cells?

Dear colleagues - Could I be confident that adding 1% SDS (V/V) into TE buffer and boiling cultures in tubes for 10 minutes would kill any living cell? Thank you, Igor Brown

01 July 2021 4,014 6 View

Where was Fischerella sp. PCC 9339/Fischerella musciola (UTEX1829) isolated?

Dear colleagues, I am currently comparing some genomic features in different representatives of Fischerella genus isolated from different eco-types. Unfortunately, neither PCC nor UTEX collection...

12 July 2020 4,327 12 View

Where were these species isolated from?

Dear colleagues, I would like to know from what source (spring) Synechococcus 60AY4M2 and Cyanobacteria bacterium M5B4 were isolated. Thank you in advance for any help. Sincerely, Igor...

11 September 2018 6,171 3 View

Where will the metals be accumulated?

Where will the metals be accumulated: within microbial cells or on their surface? Thanks IB

18 April 2017 2,265 3 View

Where had Chroococcidiopsis thermalis PCC 7203 been isolated from and by who?

I am very curious about the ecology of Chroococcidiopsis thermalis PCC 7203. Does someone have an information about the chemistry of a spring and its temperature where Chroococcidiopsis thermalis...

02 February 2017 10,147 9 View

Did ancient anoxygenic predecessors of cyanobacteria suffer oxidative stress when they oxidized Fe2+?

I would like to have opinions of Biogeochemists about whether most ancient anoxygenic phototrophs, the predecessors of cyanobacteria, could have suffered from oxidative stress (ROS) when they...

18 July 2016 5,243 2 View

What genes are involved in biossynthesis of gloeocapsin?

I would like to check out the presence of pathways of the biosynthesis of such pigments as scytonemin and gloeocapsin in genomes of some cyanobacteria. Please suggest me the names of genes or...

17 November 2015 8,119 6 View

I am wondering wheather some of you is using antibodies staining of Geobacter pili?

I am going to monitor the effect of environmental conditions on Geobacter pili development.

09 April 2013 2,939 0 View

Very important finding!

Widespread formation of methane by Cyanobacteria in aquatic ... The discovery of the ability of some cyanobacteria (CB) to form methane may have great impact, first of all, on the terrestrial...

01 January 1970 4,447 1 View