... due to hyperacute rejection. This process clots the blood, by forming antibodies that attach to the endothelium of the blood vessels in the organ. The complement system creates gaps in vessels, allowing gaps to form and clots to accumulate. Therefore, a complement inhibitor was developed as the gene was cloned, introduced into pigs whose cells produced this protein. Another thing discovered, was that the cells lining the pig vessels have a sugar molecules called alpha-galactose, and humans have lots of antibodies against alpha-gal. Some are thinking of knocking out the gene for alpha-gal and replacing it with the human gene for type O blood sugar. One other stumblin ...
... is much easier to read than Fahrenheit. Fahrenheit is hard for many people to understand and translate because it is not read in increments of one. Instead it is read having thirty-two degrees Fahrenheit being zero and two hundred and twelve degrees being the boiling point, While the Celsius (metric unit of measure for temperature) is read with one degrees Celsius being the freezing point of water, and one hundred degrees Celsius being the boiling point. I think that should be used everywhere in the world because it would make all measurements universal and understandable. I think that the United States of America will someday switch to the metric way of measuri ...
... by integrating evolutionary and transmissibility factors. INTRODUCTION Why do certain parasites exhibit high levels of virulence within their host populations while others exhibit low virulence? The two prime factors most frequently cited (Esch and Fernandez 1993, Toft et al. 1991) are evolutionary history and mode of transmission. Incongruently evolved parasite-host associations are characterized by high virulence, while congruent evolution may result in reduced virulence (Toft et al. 1991). Parasites transmitted vertically (from parent to offspring) tend to be less virulent than parasites transmitted horizontally (between unrelated in ...
... in.” (Harry Sands and Frances C. Minters, 1977, p.2) The brain consists of nerve cells or neurons. Each neuron has an electrically charged part. It receives electrical signals from other neurons, and passes them to others. All the functions of the brain depend on electrical signals that are send from one neuron to another. The normal brain generates an electrical rhythm in order way and this order in epilepsy is broken by some neurons discharging signals. Because of some genetic defect there will occur a short electrical storm that is caused by neurons and the subject will get a seizure. This condition is called epilepsy. When this happens, the muscles tight ...
... have the ability to make copies of, or replicate, itself. ? They must have a need for a "host," or functional program to which it can attach. ? The virus must do some kind of harm to the computer system or at least cause some kind of unexpected or unwanted behaviour. Sometimes es just eat up memory or display annoying messages, but the more dangerous ones can destroy data, give false information, or completely freeze up a computer. The Stealth_c virus is a boot sector virus, meaning that it resides in the boot sectors of a computer disk and loads into memory with the normal boot-up programs. The "stealth" in the name comes from the capability of this virus to possib ...
... The second reason is that autotrophs are the lowest food on the food chart. Without them many heterotrops would die from starvation. 3. Why did you put your syringes containing leaf material in the dark prior to illumination? The reason this was done was to make sure as little oxygen as possible was contained in the leaf material. This coused the experimrnt to run properly. If the leaf material was not placed in the dark, the dark reaction would not have occured using up all the oxygen. If there was still oxygen in the leaf material, the data collected would have been off. The reason for this is that the leaves would have risen to the top of the liqiud quicker, ...
... rules that the user must memorize, all ordinary arithmetic operations can be performed. The next innovation in computers took place in 1694 when Blaise Pascal invented the first "digital calculating machine". It could only add numbers and they had to be entered by turning dials. It was designed to help Pascal's father who was a tax collector. In the early 1800's, a mathematics professor named Charles Babbage designed an automatic calculation machine. It was steam powered and could store up to 1000 50-digit numbers. Built in to his machine were operations that included everything a modern general-purpose computer would need. It was programmed by--an ...
... person into a dark room with my flashlight. I had them cover their left eye and look down at the floor with their right eye. I held the flashlight up towards the ceiling under their right eye, but they kept looking at the floor, not the light. RESULTS I am writing down what everyone recorded for me. I am first: JOSH: I could see black blood vessels with orange in the background...it looked like a lot of dead tree. BRENDA: The blood vessels resembled jagged lighting bolts or trees in the winter time. LAURA: I saw crooked lines that didn't stand still, but kept changing. DARWIN: The image appeared to be in front of the body and quite enlarged. I found that it ...
... experiment to get an idea how to do the main and proper experiment and what would happen in the experiment. In the preliminary experiment we didn’t use the safeguards so it wasn’t fair experiment. We did this because it gave us the idea what problems we might face when we did the main experiment and gave us the idea how to do it. The pondweed should create photosynthesis by the following equation: - 6CO2 + 6H2O 6C6H12O6+ 6O2 Photosynthesis occurs when plants take in Carbon Dioxide from the surrounding air in its leaves and water from the nearby soil in its roots. The leaves then take light energy from the Sun, which is absorbed in the chlorophyll ...
... space, or underwater. The only testing that was allowed was underground testing. Attempts to control the number of nuclear weapons in the world began about 1970. The Strategic Arms Limitation Talks(SALT) was a convention held by the United States and the Soviet Union to limit the numbers in nuclear weapons. In 1982, the United States and the Soviet Union began the Strategic Arms Reduction Talks(START). Unlike the SALT talks, these were aimed at the number of nuclear weapons each country could obtain. Then there was another treaty signed in 1987 which was called the Intermediate Range Nuclear Forces(INF). This treaty called for the dismantling of ground-laun ...
