Hackers' Pub

Syntax	Description	Examples
`"` keyword `"`	Finds the string within quotes, including spaces. Case-insensitive. (Escape quotes inside with `\"`)	`"Hackers' Pub"`
`from:` handle	Finds content written by the specified user.	`from:hongminhee` `from:hongminhee@hollo.social`
`lang:` ISO 639-1	Finds content written in the specified language.	`lang:en`
`#` tag	Finds content with the specified tag. Case-insensitive.	`#HackersPub`
condition condition	Finds content that satisfies both conditions on either side of the space (logical AND).	`"Hackers' Pub" lang:en`
condition `OR` condition	Finds content that satisfies at least one of the conditions on either side of the OR operator (logical OR).	`#HackersPub OR "Hackers' Pub" lang:en`
`(` condition `)`	Combines the operators within the parentheses first.	`(#HackersPub OR "Hackers' Pub" OR "Hackers Pub") lang:en`

Compound Interest @compoundchem@mstdn.social

2/21/2026, 6:15:29 PM

Public

The first public display of instant photography took place #OTD in 1947. Here's a #PeriodicGraphics in C&EN that looks at the chemistry behind polaroid images: https://cen.acs.org/materials/Periodic-Graphics-chemistry-Polaroid-photography/102/i16

This infographic explains Polaroid chemistry. It shows how three silver bromide (AgBr) layers react to blue, green, and red light. When light hits AgBr, silver ions form. Potassium hydroxide deprotonates hydroquinone-linked dyes (yellow, magenta, cyan). In unexposed areas, these dyes diffuse upward to form the image. In exposed areas, silver ions oxidize the hydroquinone, locking the dye in place. Finally, an acid polymer neutralizes the base to stabilize the photo.

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