Genetic engineering, conceptual artwork. DNA (deoxyribonucleic
acid) molecule made of Lego representing scientists' ability to alter
and rearrange an organism's genetic material. DNA is composed of two
strands twisted into a double helix. Each strand consists of an outer
sugar-phosphate backbone (white) with nucleotide bases attached (red,
green, blue and yellow). The sequence of these bases forms the genetic
code, determining each cell's structure, function and behavior.
Inserting new DNA into a section of original DNA will alter the
instructions from this region.
Prozac molecules. Computer artwork of molecules of the
antidepressant drug Prozac (fluoxetine hydrochloride). Atoms,
represented as spheres, are color-coded: carbon (grey), hydrogen
(white), fluorine (green), oxygen (red) and nitrogen (blue). Prozac
inhibits the uptake of the chemical serotonin, a powerful brain chemical
that is important in mood regulation. As well as depressive illnesses,
Prozac is also used to treat other disorders, such as bulimia nervosa
and obsessive-compulsive disorder. Antidepressant drugs usually take at
least 10 days to have any beneficial effect.
SF4205Healthy heart. Conceptual image of a red heart shape with yellow capsules placed around it to look like beaming rays. This could represent love or a healthy heart. Supplements can be taken to maintain a healthy heart. Credit: Cristina Pedrazzini / Photo Researchers, Inc.
Death of a cancer cell (green). A buffy coat containing red blood cells, lymphocytes (orange) and macrophages (purple) is added to the bottom of the membrane. A group of macrophages identify the cancer cell as foreign matter and start to stick to the cancer cell, which still has its spikes. Photo magnification: 4000x. Full sequence: http://db2.photoresearchers.com/feature/infocus610.html.
The Titanic steamship was the largest ship ever built at the time. In 1912, the ship sailed from Southampton, England to New York City. On April 14th, the ship struck an iceberg near Grand Banks and sank the next day. Only about 700 people survived out of the roughly 2,200 passengers and crew.
Molecular model of Metformin, an oral antidiabetic drug and the first-line drug of choice for the treatment of type 2 diabetes. In this image, carbon molecules are black, hydrogen molecules are white, and nitrogen molecules are blue.
Light micrograph of Caenorhabditis elegans, a soil-dwelling bisexual nematode worm which feeds on bacteria. A tendency to reproduce by self-fertilization (resulting in identical offspring), along with the short time taken to reach maturity, make this tiny worm an ideal subject for genetic research. Scientists have already drawn up a "wiring diagram" of its nervous system, studied the development of each of its 959 component cells and produced a map of its genes. Attempts are now being made to decode the genetic blueprint of C. elegans, to identify every one of the 100 million letters, or bases, in its genome. Nomarski illumination. Magnification: x64 at 35mm size.
Anomalous Transport Rocket Experiment (ATREX). March 27, 2012..Clouds from suborbital sounding rockets are seen here, part of the Anomalous Transport Rocket Experiment (ATREX), launched from Wallops Island off the Virginia coast..The rockets released trimethyl aluminum, a chemical tracer, that turned into milky white luminous clouds, at altitudes of 50 to 90 miles to study the interaction of high altitude winds and complicated electrical current patterns that surround the Earth.
Prostate cancer cells, colored scanning electron micrograph (SEM). The nodular appearance of these cells is typical of cancer cells. The cells divide chaotically and may clump (as here) to form tumors, which often invade and destroy surrounding tissues. The prostate is a small gland found in men just below the bladder.