Positron Emission Tomography (PET) is an advanced medical imaging technique that is painless and safe, and provides unique information towards the diagnosis and management of many diseases. Unlike MRI or CT which mainly looks at structural anatomy or body form, PET focuses on the detection of altere... ->

Positron is used in analysis, identification and quantification. Positrons can be used in tomography (Positron Emission Tomography) Tomography is basically, imaging or in other words the recording of internal body images at a predetermined plane by means of the tomograph. A tomograph is an apparatus... ->

When a nucleus emits a positron, a proton is turned into a neutron. This will happen when a nucleus has too many more protons than neutrons to be stable. A radioactive nucleus that undergoes positron emission has a proton in its nucleus convert into a neutron and a positron, and then it ejects the p... ->

All atoms are made up of three subatomic particles: the proton, neutron and electron. Each determines part of how we see an atom: The number of protons in an atom determines its atomic number. This is the atoms "identity": all atoms with one proton are hydrogen atoms, all atoms with two pr... ->

In book 11, Odysseus hears Anticleia’s (a ghost that appeared to Odysseus) description of how Telemachus is living in Ithaca. She assures Odysseus that no one has taken the throne and that Telemachus has not only full use of his father’s possessions, but a share in the palace banquets. H... ->

Odysseus in his traveling has every reason to want his return to Ithaca. His journey is seen as the progress, both internal and external, of reaching the desired land and the wanted state of mind. He progresses from revenge and hatred to the peace of mind. Once Athena has put Odysseus in Telemachusâ... ->

The bacteria were supplied in a liquid, broth culture. They have been diluted. Scientists first gently flick the bottom of the test tubes to evenly distribute the bacteria throughout the culture medium. A pipette of 0.1ml measurement was used to transfer bacteria into each petri dish (Nohynek and S... ->

Scholarly Sunscreen Evaluation in deflecting Harmful Rays from the Sun Ultraviolet (UV) radiation is one part of solar radiation. It is increasingly filtered as sunlight passes through the atmosphere, in particular by the ozone layer. As the ozone layer is damaged, the protective filter activity of ... ->