Origin of HIV the Mystery of HIV
This paper examines the origin story of HIV, the cause of AIDS. It looks at when AIDS was first identified in the US and then around the world. How the virus which causes it was identified and traced back to Africa, and how HIV shares very similar traits to SIV, simian immuno-deficiency virus found in African monkeys.
Continuation: concepts and applications
Maximizing bone density in postmenopausal women is dependent on adequate intakes of calcium, vitamin D, vitamin K, magnesium, fluoride, phosphorus, zinc and protein across the lifetime of the individual and since there…
Gypsy Roma Healthcare in the United States Today a Culture Sensitivity Issue
Gypsies, otherwise known as Roma, came to the Americas with the very earliest settlers. Throughout the course of the past 500 years, the Roma, their preferred name, have held on to their traditions and practices.
Basal ganglia structure and function
The many roles that the basal ganglia plays in the central nervous system have been revealed primarily through disease and trauma. Patients with Parkinson's and Huntington's disease obviously suffer from motor control problems, which is the result of dopaminergic dysfunction in the basal ganglia. However, the problems related to basal ganglia disease or dysfunction is not limited to motor control, but also involves nondeclarative learning and memory. This essay examines what is known about the basal ganglia through testing of patients who are suffering from disease or injury to this essential brain function organizing center.
Rhizobium Bacteria in Soybeans
The microorganism, Bradyrhizobiumjaponicum, displays a symbiotic relationship with soybean plants. There are different factors that may affect the relationship of this microorganism with plant biomass. These factors may be pH, temperature, the nutrition status and density of soil. The aim of this study was to determine the effects of different soil treatments, in different soil types, on nodule formation and the dry weight of the plant. For this purpose, soil samples were collected from three locations, namely, at a forest, near a stream and potted soil. Each sample was then analyzed with a hydrometer and classified to a soil type. The forest soil was of clay loam type, the pot soil was loam soil and the stream sample was loamy sand. The samples were subjected to different treatments, such as sterilization and inoculation. The dry weight and number of nodules on each soil type was measured. Results showed that the greatest number of nodules were in plants that were grown in soil samples grown from the stream and least for samples collected from the forest. However, no direct relationship was observed between the number of nodules and dry weight of plants. Moreover, according to observations, the most important factor in determining nodule formation and dry weight of plants was inoculation. These results provide a significant insight to certain factors that may enhance nodule formation and crop yield.