Flu virus A (H1N1). Influenzavirus A (H1N1) is of Orthomyxoviridae
group. This virus is responsible for an infectious and contagious
respiratory disease, with symptoms of fever, aches, strain, respiratory
difficulties and cough. It can evolve to become pandemic. Viral diameter
approximately 100nm. Viral magnification 1,000,000x at 10cm and image
colorization with HDRI treatments on a Transmission Electron Micrograph
Fuel cell drawing. Illustration of how a fuel cell works. In the
effort to reduce pollution, fuel cells have been developed for use in
electric car motors. However, the problem of the over-sized hydrogen
reservoir has yet to be solved.
Headphones. Colored X-ray of the head of a person wearing a pair
of audio headphones. Bones of the face and of the rounded cranium of the
skull are seen. The internal electronics of the headphones and the
attachment lead are also visible.
A photographic emulsion impregnated with a radioactive thorium
salt reveals the tracks of alpha particles when developed. As Ernest
Rutherford & Frederick Soddy found in 1900-1902, the decay of
thorium initiates a chain of decays. First one radioactive element is
formed, then that decays to another, & so on. This is why the
emulsion picture shows the tracks of two or more alpha particles
emerging from the same spot: they are the result of successive stages in
the decay of a single nucleus. (The length of the alpha tracks in this
negative picture is about 0.03 mm).
Bacterial colonies growing in a human hand print on agar
gel. A hand was pressed onto the agar and the plate incubated. Under
normal circumstances the human body is populated by up to 100 trillion
beneficial bacteria that live on or inside us. They help to defend
against harmful disease causing bacteria. Bacteria dislodged from skin
on this hand's surface have fed on the nutrients in the agar gel and
multiplied quickly. A single bacterial cell can become a colony of 250,
000 bacteria in six hours in these conditions. Other colonies outside
the hand shape have grown from airborne bacteria.
E. coli bacteria, color enhanced scanning electron micrograph
(SEM). Escherichia coli are Gram-negative rod-shaped bacteria that are
part of the normal flora of the human gut. Some strains produce a toxin
that causes severe diarrhea and can be fatal, especially in the very
young or elderly. Magnification: x13,300 when printed at 10 centimeters
Young woman applying sunscreen to a child's nose. Ultraviolet
light rays from the sun can damage skin cells. This can be seen in the
form of tanning, freckles, and sunburns. Built-up sun damage may cause
skin cancer, making sun protection at early ages all the more necessary.
BT2727 Close-up illustration showing a cross-section of a cancerous
breast cell producing too many HER genes, which in turn produce an
excessive number of HER2 receptors. The receptors attract growth
factors, which stimulate the growth of more cells. Herceptin (generic
name: Trastuzumab) and other antibodies inhibit HER2 receptors and VEGF
growth factors. They also attract other elements of the immune system
such as the killer cell pictured upper left.
Venus begins to transit the face of the sun, on June 8, 2004. The
image shows the mysterious black drop effect which can be seen just
before the 3rd contact as the planet Venus transits the Sun's disk. A
transit occurs when Venus passes in front of the Sun as seen from Earth.
This is the first transit since 1882. Venus transits occur in pairs
separated by eight years, with alternating intervals of 121.5 and 104.5
years in between pairs. Only Mercury and Venus can transit the Sun as
seen from Earth.