A heat engine gives greater efficiency when run with a large temperature difference. In the oceans the temperature difference between surface and deep water is greatest in the tropics, although still a modest 20 to 25 Â°C.
A blastocyst is a cellular mass that forms early in the process of embryo development in mammals. In humans, this stage of embryogenesis occurs five days after fertilization, when there are fewer than 100 cells in the mass.
Blastocystis hominis--a potential intestinal pathogen. The search for (Blastocystis hominis) should be a parasitological routine analysis since it is the cause of frequent intestinal disorders. The most usual complaint of Blastocystosis patients is of intense abdominal discomfort accompanied by pain.