The School of Biomedical Sciences Wiki - User contributions [en]

Polarised light

2018-10-23T11:38:26Z

170282431:

Light from a regular sources such as sunlight and lamplight is unpolarised. This means that the oscillations of the electric and magnetic waves that make up light occur in any plane. However, by using a polariser we can only allow a certain specific orientation of these EM waves through. Therefore, polarised light is defined as EM waves that oscillate in one plane<ref>(1) The Physics Classroom. Polarisation. year published= unknown. 23/10/2018; https://www.physicsclassroom.com/class/light/Lesson-1/Polarization</ref> . 

Here is a link to a page with a simple diagram to demonstrate ( https://physics.stackexchange.com/questions/231962/linear-polarized-3d-glasses-and-the-physical-shape-of-light-waves )

'''References'''

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Polarised light

2018-10-23T11:26:57Z

170282431:

Light from a regular sources such as sunlight and lamplight is unpolarised. This means that the oscillations of the electric and magnetic waves that make up light occur in any plane. However, by using a polariser we can only allow a certain specific orientation of these EM waves through. Therefore, polarised light is defined as EM waves that oscillate in one plane<ref>(1) https://www.physicsclassroom.com/class/light/Lesson-1/Polarization</ref> . 

Here is a link to a page with a simple diagram to demonstrate ([[Polarised_light]]).

File:Polarised light.png

2018-10-23T11:20:38Z

170282431: Diagram depicting the polarisation of light waves using a polarising filter.

Diagram depicting the polarisation of light waves using a polarising filter.

Polarised light

2018-10-23T11:18:33Z

170282431: Created page with "Light from a regular sources such as sunlight and lamplight is unpolarised. This means that the oscillations of the electric and magnetic waves that make up light occur in any pl..."

Up quark

2017-12-06T00:29:35Z

170282431:

Up quarks are one of the six flavours of quarks(1). They are fundimental particles like electrons (and other leptons); which means that they cannot be broken down any further (1) (2). They have a charge of +2/3 and a baryon number of 1/3 (1). They are the smallest quarks and are the main constiuents of protons and neutrons alongside the down quark (1).

 

=== References ===

1. HyperPhysics. Quarks. [cited 05/12/2017]. Availiable from: http://hyperphysics.phy-astr.gsu.edu/hbase/Particles/quark.html

2. The New York Times. Fundimental particles. [cited 05/12/2017]. Availiable from: http://topics.nytimes.com/top/news/science/topics/fundamental_particles/index.html

Up quark

2017-12-06T00:29:18Z

170282431: rewording of second sentance

Up quarks are one of the six flavours of quarks(1). they are fundimental particles like electrons (and other leptons); which means that they cannot be broken down any further (1) (2). They have a charge of +2/3 and a baryon number of 1/3 (1). They are the smallest quarks and are the main constiuents of protons and neutrons alongside the down quark (1).

 

=== References ===

1. HyperPhysics. Quarks. [cited 05/12/2017]. Availiable from: http://hyperphysics.phy-astr.gsu.edu/hbase/Particles/quark.html

2. The New York Times. Fundimental particles. [cited 05/12/2017]. Availiable from: http://topics.nytimes.com/top/news/science/topics/fundamental_particles/index.html

Up quark

2017-12-06T00:26:43Z

170282431: Created page with " Up quarks are one of the six flavours of quarks(1). Like leptons (such as the electron) they are fundimental particles; which means that they cannot be broken do..."

Up quarks are one of the six flavours of quarks(1). Like leptons (such as the electron) they are fundimental particles; which means that they cannot be broken down any further (1) (2). They have a charge of +2/3 and a baryon number of 1/3 (1). They are the smallest quarks and are the main constiuents of protons and neutrons alongside the down quark (1).

=== References ===

1. HyperPhysics. Quarks. [cited 05/12/2017]. Availiable from: http://hyperphysics.phy-astr.gsu.edu/hbase/Particles/quark.html

2. The New York Times. Fundimental particles. [cited 05/12/2017]. Availiable from: http://topics.nytimes.com/top/news/science/topics/fundamental_particles/index.html

Ligand-gated sodium channels

2017-12-05T23:53:15Z

170282431: Created page with " Ligand gated Na+ channels are found in the post synaptic membrane of the neuromuscular junction (1). After a neurotransmitter (acetylcholine) binds to its receptor the chan..."

Ligand gated Na+ channels are found in the post synaptic membrane of the neuromuscular junction (1). After a neurotransmitter (acetylcholine) binds to its receptor the channel opens (undergoes a conformational change) allowing Na+ to enter the motor endplate and K+ to flow out (1) (2). This causes the motor endplate to depolarise. If the end plate potential reaches a high enough potential it will go on to trigger an action potential in the cell (1). References 1. Alberts, et al. Essential Cell Biology. 4th edition. Abingdon. Garland science. Page 410-412 2. Mheducationcom. Animation: Receptors Linked to a Channel Protein. [Accessed 5 December 2017]. Available from: http://highered.mheducation.com/sites/0072495855/student_view0/chapter2/animation__receptors_linked_to_a_channel_protein.html