Friday 24 May 2024

Science Book Catalogue

I have a growing collection of science eBooks available on the Google Play Bookstore.

Book Title and Contents
Maths and Chemistry Refresher for Life and Biomedical Scientists
Go to Download

Maths and Chemistry Refresher for Life and Biomedical Scientists

The book is a refresher for life, biomedical sciences and chemistry students who may be a little unsure of some of the key maths and chemistry skills they need and covers: Elements, atoms, ions, molecules, and compounds; Atomic weight, isotopes and molecular weight; Amounts, volumes, and concentrations; The SI units and the SI unit prefixes (m, µ, n, p etc.); Scientific Notation; Dealing with unit prefixes (m, µ, n, p etc.) in calculations; Order of operations (BODMAS and PEMDAS) in maths; How to get the best out of your calculator; Maths 'tricks' — Logs; and, graphs

Coming soon....

The big bumper book of Biomedical Sciences Terms and Definitions.

The book will contain the definitions of over 2,000 terms used in the biomedical and life sciences, along with commonly used abbreviations, molecular structures and links through to over 40 relevant videos that place the terms in context.

Tuesday 21 May 2024

New Video Posted: Understanding Microtubules: Structure, Function, and Dynamics.

I have posted the third in my series of four videos on the cytoskeleton - Understanding Microtubules: Structure, Function, and Dynamics.

In the video, I take a quick look at microtubules, one of the essential filaments that form the cytoskeleton of cells. I explore their structure, function, and dynamic nature. 

Monday 20 May 2024

New Video Posted: Understanding Actin Filaments: Structure, Function, and Dynamics

This is the second in a series of four videos on the cytoskeleton - Understanding Actin Filaments: Structure, Function, and Dynamics.

In this video, I look at actin filaments, an essential component of the cell's cytoskeleton. 

I examine their structure, the process of filament formation, and their diverse functions in various cellular processes. I also discuss different types of actin filament structures, including contractile bundles (loose packing with myosin-II), gel-like networks (e.g., filamin), dendritic networks of branched actin molecules, and tight parallel bundles (e.g., fimbrin).

Friday 17 May 2024

New Video Posted: What is the Cytoskeleton? | Cell Biology Explained

This is the first in a series of four videos on the cytoskeleton - What is the Cytoskeleton? | Cell Biology Explained.

In this video, I introduce the cytoskeleton, a complex network of protein fibres and accessory proteins that provides essential support and strength to the cell. The cytoskeleton absorbs mechanical stress, controls cell shape and movement, enables muscle contraction, and aids in chromosome separation during mitosis and meiosis. Additionally, it helps the cell divide and provides trackways for moving molecules and vesicles.

Cell Membranes - role, function and problems

I have just finished posting a series of four videos on the cell membrane:

The videos are an introduction to membranes and cover:
  • Why do cells and organelles have membranes?
  • The function of membranes in the cell
  • The structure and components of the membrane
  • The problems solved by having membranes
  • The problems caused by having membranes
  • The role of proteins in the membrane
  • How cells move material actively and passively across membranes
  • How cells move information across the membranes - the receptors
Each video comes with a free information sheet that summarises the key points in the video and defines the key terms used.


New video posted: Cellular Membranes: Moving information across the membrane - the receptors

In this video, Cellular Membranes: Moving information across the membrane - the receptors, I discuss one of my favourite areas of cell biology - cell signalling.

In the video, I look at how cells receive information across their membranes and the three primary methods they use to sense external molecules and ions, from diffusion through the membrane to communication via gap junctions and interactions with specialised proteins called receptors.

The video covers various receptor types, including ion-channel linked receptors, G-protein-coupled receptors (GPCRs), and enzyme-linked receptors, explaining how each type facilitates the transmission of signals inside the cell.

This is one of four videos on membranes, the other two being:


New Video Posted: Cellular Membranes: Moving material and information across the membranes - membrane transport

In this video, Cellular Membranes: Moving material and information across the membranes - membrane transport, I look at how the cell resolves the issue of membranes preventing ions, molecules and information from entering or leaving the cell. That is, how do we transport such things across the membrane?

In this video, I examine cellular transport and how proteins facilitate the crucial exchange of molecules, ions, and information across cell membranes. The video explains both passive and active transport mechanisms and highlights the specialised roles of carrier and channel proteins in these processes.

This is one of four videos on membranes, the other two being: