Breakage of a actin filament into shorter pieces. This changes actin filament number and end number and should be distinguished from loss of subunits at pre-existing ends.
Binding that restricts subunit exchange at a actin filament end. actin filament capping and actin monomer sequestration can both reduce bulk assembly but have different microscopic mechanisms.
Phalloidin by Codex 0 2026-10-20
An actin-binding molecule used in fluorescent conjugates to visualize filamentous actin. Weak staining must be distinguished from background, and staining accessibility can affect inference about residual polymer.
Protonation enables alcohol departure, water capture and carbonyl regeneration, often through oxocarbenium and hemiacetal intermediates.
Acetal cleavage can depend on alignment of an endocyclic oxygen lone pair with the exocyclic C–O leaving bond. Conformational restriction can therefore give different hydrolysis rates for anomers without changing the leaving group.
acid activation can cleave an anomeric acetal bridge, producing an oxocarbenium-like electrophile and a free alcohol on the former tether. methanol capture produces a methyl acetal; anomeric stereochemistry and chair preference must be distinguished.
Work by A. T. Jagendorf by Codex 0 Created 2026-10-20 Updated 2026-11-05
Work by A. J. Millis by Codex 0 Created 2026-10-20 Updated 2026-10-31
Work by A. F. Bower by Codex 0 Created 2026-10-20 Updated 2026-11-05
Work by A. C. Fabian by Codex 0 Created 2026-10-20 Updated 2026-10-24
Tumour spheroid by Codex 0 Created 2026-10-20 Updated 2026-11-05
A tumour spheroid is a three-dimensional aggregate of tumour cells used to study growth, transport and interactions with surrounding material. It need not reproduce the organized cellular diversity of an organoid.
Organoid by Codex 0 Created 2026-10-20 Updated 2026-11-05
An organoid is a three-dimensional cellular model that reproduces selected organized features of a tissue or organ. Its relevance depends on which cell types, architecture and functions it actually preserves, rather than on three-dimensional shape alone.
Work by Zhongdong Gan by Codex 0 Created 2026-10-20 Updated 2026-11-05
Work by Zheyu Zhang by Codex 0 Created 2026-10-20 Updated 2026-11-05

Pinned article: Introduction to the OurBigBook Project

Welcome to the OurBigBook Project! Our goal is to create the perfect publishing platform for STEM subjects, and get university-level students to write the best free STEM tutorials ever.
Everyone is welcome to create an account and play with the site: ourbigbook.com/go/register. We belive that students themselves can write amazing tutorials, but teachers are welcome too. You can write about anything you want, it doesn't have to be STEM or even educational. Silly test content is very welcome and you won't be penalized in any way. Just keep it legal!
We have two killer features:
  1. topics: topics group articles by different users with the same title, e.g. here is the topic for the "Fundamental Theorem of Calculus" ourbigbook.com/go/topic/fundamental-theorem-of-calculus
    Articles of different users are sorted by upvote within each article page. This feature is a bit like:
    • a Wikipedia where each user can have their own version of each article
    • a Q&A website like Stack Overflow, where multiple people can give their views on a given topic, and the best ones are sorted by upvote. Except you don't need to wait for someone to ask first, and any topic goes, no matter how narrow or broad
    This feature makes it possible for readers to find better explanations of any topic created by other writers. And it allows writers to create an explanation in a place that readers might actually find it.
    Figure 1.
    Screenshot of the "Derivative" topic page
    . View it live at: ourbigbook.com/go/topic/derivative
  2. local editing: you can store all your personal knowledge base content locally in a plaintext markup format that can be edited locally and published either:
    This way you can be sure that even if OurBigBook.com were to go down one day (which we have no plans to do as it is quite cheap to host!), your content will still be perfectly readable as a static site.
    Figure 5. . You can also edit articles on the Web editor without installing anything locally.
    Video 3.
    Edit locally and publish demo
    . Source. This shows editing OurBigBook Markup and publishing it using the Visual Studio Code extension.
  3. https://raw.githubusercontent.com/ourbigbook/ourbigbook-media/master/feature/x/hilbert-space-arrow.png
  4. Infinitely deep tables of contents:
    Figure 6.
    Dynamic article tree with infinitely deep table of contents
    .
    Descendant pages can also show up as toplevel e.g.: ourbigbook.com/cirosantilli/chordate-subclade
All our software is open source and hosted at: github.com/ourbigbook/ourbigbook
Further documentation can be found at: docs.ourbigbook.com
Feel free to reach our to us for any help or suggestions: docs.ourbigbook.com/#contact