Science

262 total

Calcium transport study of SF-9 lepidopteran cells and bull frog sympathetic ganglion cells ABSTRACT The intracellular calcium level and the calcium efflux of the bull-frog sympathetic ganglion cells (BSG) and the SF-9 lepidopteran ovarian cells were investigated using a calcium-sensitive fluorescence probe fura-2. It was found that the intracellular calcium levels were 58.2 and 44.7 nM for the BSG cells and SF-9 cells respectively. The calcium effluxes following zero calcium

Proteins made from ribosomes attached to the rough endoplasmic reticulum enter the lumen of the ER and move to the smooth endoplasmic reticulum. A small vacuole (vesicle) pinches off the smooth ER and carries the protein to the Golgi apparatus, where it is further processed. ------------------------------------------------------------- Mitochondria are bounded by a double membrane. The inner membrane is folded to form little shelves, called cristae,

England went through dramatic changes in the 19th century. English culture, socio-economic structure and politics where largely influenced by the principles of science. Many social expressions occurred due to these changes. Transformations which categorized this time period could be observed in social institutions; for instance: the switch from popular Evangelicalism to atheism, emergence of feminism and the creation of new political ideologies (Liberalism,

1. a) Bulk movement is the overall movement of a fluid. The molecules all move in the same direction. Diffusion however is the random movement of molecules which usually results in a fairly even distribution. In other words the movement is not guaranteed to move in one direction but the probability that it will move in the lower gradient is greater. Osmosis is similar to diffusion but is differentiated by the membrane's behavior. The cell membrane does allow wa

Sensitive chromosome probes recently discovered by a University of Toronto geneticist will make it easier to detect certain types of genetic and prenatal diseases, as well as being used to determine paternity and provide forensic evidence in criminal cases. Probes are short pieces of DNA which bind to, and actually pinpoint, particular sites on a chromosome. Because these new probes are actually repeated hundreds or thousands of time at a particular site, they are much more sensit

Cleft Lip and Palate are facial birth defects. A cleft lip affects the upper lip, ranging from a notch to a complete fissure extending into the nose. A cleft palate affects the roof of the mouth, with a groove that may extend through the dental arch. These abnormalities may occur separately or together. Cleft lip and palate are facial malformations that may occur separately or together. They may also occur in association with other syndromes or birth defects. The separation of the

Geographers can tell you that the one thing that most rivers and their adjacent flood plains in the world have in common is that they have rich histories associated with human settlement and development. This especially true in arid regions which are very dependent upon water. Two excellent examples are the Nile and the Tigris-Euphrates rivers which show use the relationship between rivers and concentrations of people. However, the Colorado River is not such a go

New technologies have always allowed us to do things faster, more efficiently, and more professionally than ever before. Generally, every new technology is a step forward for speed and productivity. But, despite this paradigm, the coming of the latest mail communications innovation has brought many pros and cons with the package. Electronic mail could be the greatest thing since sliced bread, but there are many who find flaws in it. We are now going to take a m

The following bulletin was prepared from Grocery Industry Committee on Solid Waste October 24, 1991 EXECUTIVE SUMMARY Solid waste composting is an important component of an integrated solution for solid waste management. Composting can divert organic, compostable materials, not otherwise recycled, from the solid waste stream and convert them into a useful product. Composting is environmentally sound, technically and economically feasible and meets local waste management needs. T

The meaning of Hacker is one who accesses a computer which is supposably not able to be accessed to non authorised people of the community. Hackers may use any type of system to access this information depending on what they intend on doing in the system. Methods Hackers may use a variety of ways to hack into a system. First if the hacker is experienced and smart the hacker will use telnet to access a shell on another machine so that the risk of getting caught is