Biology Research Paper Example | Topics and Well Written Essays - 250 words

Biology - Research Paper Example The uses of gene therapy are to replace absent or defective genes, deliver genetic material into cells that speed the destruction of cancer cells, deliver genetic material into cells that cause cancer cells to revert back to normal cells, deliver genes of bacteria or virus as a form of vaccination, deliver genetic material that either impedes or promotes growth of a new tissue and deliver genetic material that stimulates healing of a damaged tissue (Hecht, 2004). 1. Ex vivo gene therapy: Here, gene delivery is done in cells after being removed from the body (Hecht, 2004). These cells are grown in the laboratory. The cells are than modified outside the body and then transplanted back into the body. In some research trials, cells from blood or born marrow are taken out and cultured in a laboratory. Thereafter, the cells are exposed to the virus with the desired gene. The virus infects the cells and transfers the therapeutic genetic material into the nucleus of the cells. After this, the cells are injected into the patient’s body by vein. Gene therapy has been used to restore vision in dogs. It has also been attempted to treat Lebers congenital amaurosis, a type of inherited childhood blindness caused by a single abnormal gene. Studies have shown that tumor suppressing genes delivered in lipid-based nanoparticles reduces the number and size of human lung cancer tumors in mice. Reengineered lymphocytes have been used to attack cancer cells in metastatic melanoma and myeloid disorders. Other studies have suggested a possible cure for diseases like Hingtinton’s chorea, severe combined immunodeficiency and sickle cell diseas, thalassemia, cystic fibrosis and some cancers in the future (Genomics.energy.gov). Researchers are also experimenting with introducing a 47th (artificial human) chromosome into target cells. It is expected that this chromosome would

Crime Scene Essay Example | Topics and Well Written Essays - 1500 words

Crime Scene - Essay Example While using blood to serve as evidence for the crime, the crime scene investigator (CSI) can use a scalpel, smear slides, scissors, tweezers, ultra violet light, sterile square cloths, luminol, and protective eyewear. It is also ideal to gather samples from suspected individuals or a living victim to facilitate in the comparison process. Since the victim is dead, it is the role of the CSI to ensure he uses either sterile square cloth, or small quantities of distilled water to facilitate in removing the blood from the victim’s body. The same process can be used in collecting blood from any other place that has blood contact. The blood gathered may be from a different person, where the laboratory performs a DNA analysis to compare with the blood gathered from the suspect. It would also be ideal if the CSI scrapes the nails of the victim because in case of a struggle, then the skin of the suspect, which would reflect his DNA, would be under the nails of the victim. This process would facilitate in gathering blood evidence concerning a crime scene and the potential suspect to the shooting incident. I am a crime scene investigator with more than 10 years’ experience in the undertaking investigations on various types of crimes. As a professional in this position, I have processed a variety of crime scenes, including outdoor crime scenes, indoor crime scenes, and conveyance crime scenes (such as vehicle burglary, carjacking, grand theft, homicide, and sexual battery). With this experience, I believe that the investigation I carried out pertaining to the crime is sufficient in giving testimony to this case that the offender was involve in the crime. ` To be a qualified crime scene investigator, I have undergone rigorous training in diverse fields. I have been subjected to demanding training, which has allowed me to portray moral character, good repute, high integrity, and