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Hope all is well, contact me if you need help.
Adesarroff@virginbroadband.com.au
17 Friday Oct 2014
Posted Uncategorized
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Hope all is well, contact me if you need help.
Adesarroff@virginbroadband.com.au
28 Sunday Sep 2014
Posted resource
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26 Friday Sep 2014
Posted summary
inX-ray diffraction studies undertaken at King’s College London provided part of the experimental structural data needed to solve the general structure of the DNA double helix. Yet, as important as these observations were other methods and disciplines were of equal importance in unravelling the overall structure, in particular the biochemical work of Erwin Chargaff and the biological insight of Jim Watson. X-ray diffraction work on DNA at King’s did not finish with the unveiling of the structure in March 1953 but continued for another decade as Wilkins and his team worked to test to the correctness of the “Watson-Crick” model.
26 Friday Sep 2014
Posted Biology news
inTags
26 Friday Sep 2014
Posted hsc question, resource
inThis reference discusses the poor collaboration between these scientists.
It also discusses the significance of the discovery of the structure DNA.
note RELIABILITY of the source.
I HAVE NOT USED THIS SITE BEFORE THAT I CAN REMEBER. HOWEver I AM COFIDENT THE SOURCE IS RELIABLE BECAUSE;
It refers to the work of Lyn Elkin, California State University. I have read her work.
The information is consistent with other sources. (Remember the video about Rosalind Franklin. This was produced by PBS IN America, a well known source of news, science documentaries.)
It s consistent with biographies I have read about Franklin. Consistent with our text books.
Published in 2008, relatively recent.
23 Tuesday Sep 2014
Posted Uncategorized
in23 Tuesday Sep 2014
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in23 Tuesday Sep 2014
Posted Uncategorized
inTHE SYLLABUS ASKS; TO GATHER INFORMATION TO DISTINGUISH BETWEEN THE CERE BELLUM, CEREBRUM, MEDULLA OBLONGATA AND LOCATE THE REGIONS INVOLVED IN SPEECH, SIGHT, AND SOUND PERCEPTION.
http://www.biologycorner.com/anatomy/sheepbrain/sheep_dissection.html
22 Monday Sep 2014
Posted hsc question
in22 Monday Sep 2014
Normal hearing
1/ sound wave
2/ the pinea directs sound wave to the ear drum or tympanic membrane
3/ the ear drum vibrates..sound energy changes to kinetic energy
4/ the ear drum transfers this energy to 0ssicles
5/ at the oval window this kinetic energy causes the fluid in the cochlea to vibrate
6/ the vibrating fluid causes hairs in the cochlea to move.(each hair responds to a specific frequency)
7/ this changes the permeability of the hair cell membranes to change creating an action potential.
8/ these action potentials pass to the auditory nerve.
cochlea implant
This device replaces the functions of the outer and middle ear.
1/. A microphone behind ear picks up sound
2/ a speech processor in the chest pocket converts sound into a digital signal
3/ digital signal sent to transducer behind the ear.
4/ digital signal sent to a transmitter inside skull
5/ signal sent to array of surgically implanted in cochlea
6/ electrodes stimulate auditory nerve.