Ian Marshall

@ianpgm.bsky.social

551 Followers 759 Following

Associate Professor at Department of Biology, Aarhus University, Denmark 🇩🇰 working on microbial genomics, bioinformatics, cable bacteria, and other sediment microorganisms. https://www.au.dk/en/ianpgm@bio.au.dk/ 🇦🇺

Two men sampling sediment from a stream in a forest. The one on the left holds coring equipment that he has just used to collect sediment, while the other, standing in the stream, empties that sediment into a plastic tube. And empty 2L glass bottle is on the bank.
2 U+0032 DIGIT TWO
H2O vs H₂O written in Word, demonstrating the difference between formatting as subscript and using the Unicode character for subscript 2.
dplyr verb genzplyr verb Meaning filter() yeet() Remove rows that don't pass the vibe check select() vibe_check() Keep only columns that matter mutate() glow_up() Transform your data into its best self summarise() no_cap() Get real summary stats, no lies arrange() slay() Sort by slay factor group_by() squad_up() Group data into squads ungroup() disband() Break up the squad rename() lowkey() Change names on the down-low distinct() periodt() Remove duplicates, and that's on periodt pull() main_character() Extract a column (give it main character energy) slice_head() send_it() Take the top rows and send it count() its_giving() Count occurrences (it's giving statistics)
A view of a suspension bridge, the Great Belt Bridge between Fyn and Sjælland in Denmark.
A google maps screenshot of the Antwerp University Drie Eiken Campus, with "Microbial Electricity" a labeled landmark.
Lars Peter Nielsen and Andreas Schramm stand on a stage in front of a screen with a slide that says "Welcome to Electromicrobiology 2025, Welcome to Aarhus, for the 4th time"
A page from the book Intraterrestrials. The important part: "Type NCBI BLAST into your internet search engine, choose the top hit, choose Nucleotide BLAST or blastn, copy one or both of the entire gene sequences above, paste them under Enter Query..."
Cover of the book Intraterrestrials by Karen G. Lloyd.
A Danish raspberry slice cake (hindbærsnit) with the text "CONGRATULATIONS LARS PETER 70 YEARS", a cartoon picture of Lars Peter, and cartoon pictures of cable bacteria, all drawn in chocolate on a white icing background.
TapeStation measurement of DNA fragment size showing peak at 20kbp
Aarhus University Lake in foggy weather. Ice is in the process of melting, leaving a solid layer just below the lakes surface that birds are standing on, giving a weird effect, as if they're standing on water. Backdrop of trees without leaves (deciduous, winter) reflected in the unusually flat lake surface.
Use of Generative AI in the genomics module Computer programming – generating linux code, R code, etc. - green light Writing tool – improving readability, structure, grammar of report - amber light Planning out your presentation - amber light AI art for presentations – no need for “art” in a scientific presentation - red light Finding references – either hallucinations or vastly insufficient - red light Factual information – AI makes serious mistakes about niche subjects - red light Remember to always disclose any use of AI in whatever you submit!
Picture from my office window on Aarhus University campus in winter. Bright blue sky, sunshine, a thin layer of snow covers the ground. Some of AU's characteristic yellow-brick buildings are visible to the left, snow-covered deciduous trees to the right.
A lunch room - tables and chairs visible in the lower left, window to the left, and a Fuller projection map of the world hanging on the wall.
The cover page of Applied and Environmental Microbiology, Volume 90, Number 10, October 2024. A light microscopy image of filamentous cable bacteria gathered around black horizontal lines of varying widths (graphite electrode) near the top of the image. Towards the bottom of the image dark amorphous shapes are visible (sediment). Some cable bacteria are stretched directly from the sediment to the filament. The logo for the American Society for Microbiology (a stylized microscope on a red rectangular background) is in the bottom left-hand corner.
A histogram showing sequence identity frequency for read mapping.
Hot air balloon icon saying "What a productive day! You've accomplished a lot" from Microsoft Outlook when you empty your inbox.
View of Aarhus Ø and the ship's wake through the A-frame of the RV Aurora, as the ship steams away from the city out into Aarhus Bay. A Danish flag is visible in the top right
#Holy shit that actually worked...
"comments that can be pretty easily addressed" with "pretty easily" highlighted by outlook for not being concise enough.
A map showing sampling points in the Arabian Sea that were supposed to be in Denmark
Sandbjerg Manor near Sønderborg
Announcement for course "Microsensor Analysis in the Environmental Sciences"
Nanopore read stats for class