Word: oxygenate
(lookup in dictionary)
(lookup stats)
Dates: all
Sort By: most recent first
(reverse)
Another blue-baby mother has had five normal children. Why the less fortunate ones lose their babies, Drs. Taussig and Neill are not certain. They doubt that it is simply because of oxygen shortage, but suspect that a little-understood hormone deficiency is involved...
...Fifth Anomaly. Most blue babies, so called from the color of their fingertips and lips, suffer from a set of four inborn defects in the heart and arteries, known as Fallot's tetralogy. The effect is to recirculate much blood from which oxygen has been naturally removed in the veins, and send only part of it to the lungs for re-oxygenation. The Taussig-Blalock operation, devised years before open-heart surgery with a heart-lung machine became possible, is a compromise: it consists of purposely creating a fifth defect-a connection from the aorta to the pulmonary artery...
Some have theorized that the planet is nothing but a baked desert; others that it is covered with oceans. Still others have concluded that Venus' atmosphere is mostly carbon dioxide and nitrogen; they argue that there is neither enough water nor enough oxygen there to support life...
Some of the mystery began to come clear in 1938 after researchers learned to use isotopes to trace the transformation from water and carbon dioxide to sugar and oxygen. But how does light start the process? In the British scientific journal Nature, two University of California biochemists, Drs. Kunio Tagawa and Daniel Arnon, report that they have moved closer than ever before to a satisfactory answer...
...researchers are designing experiments to exploit this new knowledge of photosynthesis. Drs. Arnon and Tagawa have already been able to recognize a striking similarity between photosynthesis in plants and chemical processes that are carried on by certain bacteria that live in the soil, cut off from both sunlight and oxygen. The discovery, says Dr. Arnon, demonstrates "the beautiful biochemical unity of nature...