منابع مشابه
The function of the conus arteriosus in the Port Jackson shark, Heterodontus portusjacksoni.
The conus arteriosus is a muscular chamber interposed between the ventricle and ventral aorta in Elasmobranchii, Holocephalii and the more primitive families of bony fish. Since Duverney (1702) suggested that it functioned as an extra ventricle, it has been variously regarded as an elastic reservoir to minimize pressure fluctuations (Keith, 1924; Daniel, 1934), an accessory pumping chamber (Geg...
متن کاملA hermaphroditic Port Jackson shark, Heterodontus portusjacksoni , with complete and separate female and male reproductive tracts
One of 353 Port Jackson sharks, Heterodontus portusjacksoni, caught o¡ the southern coast of Western Australia, was a hermaphrodite. The female reproductive tract consisted of a large (functional) right ovary with three large yolked ova, a small non-functional left ovary and two well-developed uteri and oviducal glands. The male tract comprised two conspicuous but undeveloped testes, two vas de...
متن کاملthe effect of taftan pozzolan on the compressive strength of concrete in the environmental conditions of oman sea (chabahar port)
cement is an essential ingredient in the concrete buildings. for production of cement considerable amount of fossil fuel and electrical energy is consumed. on the other hand for generating one tone of portland cement, nearly one ton of carbon dioxide is released. it shows that 7 percent of the total released carbon dioxide in the world relates to the cement industry. considering ecological issu...
Baillarger and Jackson: the principle of Baillarger-Jackson in aphasia.
For a French neurologist whose neurological training has been carried out at the school of the Salpetriere, Paris, Queen Square seems to be, in a certain way, London's Salpetriere. This assumption may be partly true, since these two famous hospitals have been for years dedicated to the nursing and to the study of the diseases of the nervous system, and both have a rich and peculiar tradition an...
متن کاملThe Jackson Laboratory
The Roscoe B. Jackson Laboratory, known commonly in the scientific field as the Jackson Laboratory, was founded by Clarence Cook Little [5] in May 1929. The lab has been pivotal in research with in vitro [6] fertilization [7], teratomas, gene replacement therapy for birth defects [8] , and more because its researchers have focused from the beginning on developing the mouse [9] as a model organi...
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ژورنال
عنوان ژورنال: South African Journal of Botany
سال: 2009
ISSN: 0254-6299
DOI: 10.1016/j.sajb.2009.02.169