GCSE Additional Science Biology Respiration

In this basic accounting lesson, we explain what the Cash Receipts Journal (CRJ) is, and what it is used for. We also go through the Cash Receipts Journal (CRJ) format and go through examples of completing the Cash Receipts Journal (CRJ).

Cash Payments Journal (CPJ) | Explained with Examples: https://youtu.be/WsbJ5LFt5rg

Accounting Equation | Explained with Examples | Accounting Basics: https://youtu.be/uYIc3QRdXr8

Accounting Equation | with Debits and Credits | Explained with Examples Lesson 2: https://youtu.be/tjBNhiV3Pos

How to easily Remember DEBITS and CREDITS | Simple Tip | Accounting Basics: https://youtu.be/_AKoCgOlTcw

Debit and Credit Explained | Accounting Basics: https://youtu.be/qBTpJSiAJBw

General Journal Explained With Examples | Accounting Basics: https://youtu.be/DjONzUPnhkM

Depreciation & Accumulated Depreciation Explained: https://youtu.be/oBfFP_nFxsM

Check out other straightforward examples on our channel.

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Scientists at the University of California Los Angeles have found a way to create stunningly detailed 3D reconstructing of platinum nanoparticles at an atomic scale. These are being used to study tiny structural irregularities called dislocations.

Read the paper here: http://dx.doi.org/10.1038/nature12009

Sign up for the Nature Briefing: An essential round-up of science news, opinion and analysis, free in your inbox every weekday. https://go.nature.com/371OcVF

⁣Grade 8 Science

⁣Material is a substance or mixture of substances that constitutes an object. Materials can be pure or impure, living or non-living matter. Materials can be cl****ified on the basis of their physical and chemical properties, or on their geological origin or biological function.

⁣A Non-Biodegradable material can be defined as a kind of substance which cannot be broken down by natural organisms and acts as a source of pollution. Unlike biodegradable wastes, non-biodegradable cannot be easily handled. Non-biodegradable wastes are those that cannot be decomposed or dissolved by natural agents.

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⁣Our solar system consists of our star, the Sun, and everything bound to it by gravity – the planets Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune; dwarf planets such as Pluto; dozens of moons; and millions of asteroids, comets, and meteoroids.

⁣A verb is a word that indicates a physical action (e.g., “drive”), a mental action (e.g., “think”), or a state of being (e.g., “exist”). Every sentence contains a verb. Verbs are almost always used along with a noun or pronoun to describe what the noun or pronoun is doing.

Biolab is a short educational DVD aimed at GCSE Biology students in the UK. We learn about one of the three main types of pathogen, the virus, and the immune system's response to it.<br />
<br />
The DVD formed part of my final year project for my degree in digital animation at the University of Greenwich, and it features particle systems and small-scale crowd simulations to depict the behaviour of cells and virus particles. It was created in 3ds Max and rendered with mental ray.<br />
<br />
The music was produced by David Utton and the voiceover was provided by Michele Walford.

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SUMMARY: This karaoke-style music video provides a musical explanation of the structure of the cell membrane. This includes the structure of phospholipids, the key structural component of biological membranes, and how phospholipids interact with water to organize themselves into a phospholipid bilayer. The roles of membranes proteins, carbohydrates, and cholesterol is also discussed.

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Lyrics:

If you're in a cell's cytoplasm, heading outside,
Your last stop's a barrier, 8 nanometers wide,
The cell membrane: our subject for today
It's as basic to life as DNA

It's Selectively permeable, like a border patrol
of a country it maintains control.
Selecting what leaves or what gains entry
It's a guard, bouncer, watchman, patrolman or sentry.

But not just a guard, it sends signals in nerves
White blood cells use their membranes to eat germs like hors d'oeuvres,
Membranes have receptors, enzymes and junctions,
So what kinds of structure can have all these functions?

CHORUS
C-E double L, "Mem" B-R-A-N-E
Controlling transport selective permeability
Phospholipids, Carbohydrates, Proteins and Cholesterol
The Fluid Mosaic Bilayer in us all

So let's take a look at what makes up the membrane,
Phospholipids rule this domain,
In fact membrane structure emerges directly
from phospholipids' chemical properties.

There's a head and a tail on every phospholipid,
The tail's two long chain fatty acids
Bound to a glycerol, it's made to order
The tail's non-polar --hydrophobic-- fears water

The head's got a phosphate, it's charged negatively,
makes the head hydrophilic--plays in water happily
So tail avoids water while the head's attracted to it,
When phospholipids form the membrane that's how they do it.

Cause when phospholipids into water get submerged,
A phospholipid bilayer structure will emerge
The tails hang together in a water free zone,
Hear their hydrophobic moan, "water leave me alone!"

While the heads are sticking out touching all those H2Os
Tails in, heads out, it's how every membrane goes
Tails in, heads out, in a cellular sphere,
It's the bilayered basis of membranes everywhere.

CHORUS

But a cell membrane's not just a phospholipid scene
There's cholesterol, carbohydrates, lots of proteins.
In fact, membrane proteins have a presence so great,
that they often exceed the phospholipids by weight.

And all of these components are in constant motion,
Moving, mixing like a boiling potion,
Flowing like dancers in a party in Pasaic
That's why the membrane's thought of as a fluid mosaic.

Let's start with proteins since they're key in this mix.
Transmembrane proteins span the entire width.
Typically they're ports--think of channels or conveyors,
For things that don't go through the lipid bilayer.

Any protein embedded in the hydrophobic middle
Built right into the inside is considered integral
While peripheral proteins either hang on the exterior,
Or inside on the cytoplasmic interior.

Cholesterol keeps membranes flowing with ease,
In cold it keeps the lipids moving so they don't freeze,
In heat it slows the lipids down limiting their traveling,
Cholesterol: it keeps membranes from unraveling

Membrane carbohydrates work as markers or signs
So your immune system knows which flag your cells are flyin'
The blood types AB, O, and B and A
Are about the carbohydrates on red blood cell membranes.

CHORUS