Ways Of Environmental Protection Essay Example | Topics and Well Written Essays - 500 words - 3

Ways Of Environmental Protection - Essay Example The background of the article’s title holds significant meaning derived from Jean Rostand who said that â€Å"The obligation to endure gives us the right to know.† This is exactly where the main argument of the essay lies because Carson is correct in the presumption that people, in general, know very little of what’s inside a bug spray or a pesticide and how it affects our entire way of life as human beings. We are but too oblivious to go beyond the product label to scrutinize how these things affect us. The author is correct in saying that there must be more stringent policies and measures regarding the manufacture, sale, and distribution of these substances. Primarily, these harmful chemicals must not be allocated to industries or people indiscriminately. Next, there must be more investigation regarding how these biocides affect vital sources like the earth, water, animals and especially the health of man. All of these must necessarily be relayed to people who had been kept in the shadows. The ability of the people to grasp the extent of the problem and how it affects them must be factored in because they are the ones who are extensively affected. The current atmosphere of fear of diseases attributed to harmful chemicals best explains why there has been a recent increase in the demand for organic food and materials. There had been studies relating certain diseases like cancer to the harmful chemicals produced industrially. People are shedding out extra dollars just to be able to purchase food that is absolutely safe for consumption and this is correlated with eating only organically produced nourishment. There are little to no known legislation or policies regarding the use of insecticides and this is still yet to be fully addressed.

Forensic Entomology research paper Example | Topics and Well Written Essays - 1500 words

Forensic Entomology - Research Paper Example It was not until 1668 that Francesco Redi disproved this by observing how these creatures developed into flies, and much later, in 1894 that Megnin developed a method to link this process with a method for calculating the age of a dead body (Byrd and Castner, p. 41). Throughout the twentieth century scientific methods of analysis have improved greatly, with the result that at the present time forensic entomology is a well-established discipline within forensic science, complete with rigorous protocols and extensive underpinning research which help to ensure that it provides relevant, accurate and reliable evidence for crime investigation and prosecution purposes. Forensic entomology is therefore a dual discipline combining elements of natural science in the methods of collection and analysis of samples, and elements of criminology, in the interpretation and application of results, and in the preservation of evidence which is reliable enough to stand up to scrutiny in the criminal jus tice system. Although these two areas have a different focus, they are closely aligned in crime investigation procedures, requiring collaboration across disciplines according to clear scientific principles. This paper explores the contribution that forensic entomology makes to crime investigation and prosecution by examining three of its major areas of application: 1. Determining the post mortem interval (PMI); 2. Providing human DNA linkages and 3. Providing toxicology information. A number of limitations as well as legal and procedural issues are covered also in section 4. 1.Determining the Post Mortem Interval (PMI) through forensic entomology. 1.1 Species involved. Corpses provide a very specialized ephemeral environment which is colonized by particular communities of arthropods in a predictable manner, with one species following on after another in a process known as â€Å"succession† (Horswell, 2004, p. 347). The main species The first species to arrive, often within mi nutes of death, are blowflies. Blowflies from the Calliphoridae family are generally the first stage invaders, and then after these others follow Sarcophagids which constitute a second stage, often overlapping with the first stage somewhat. After this follow the third stage Muscids and Piophilids (Horswell, 2004, p. 348). 1.2 Types of information obtainable. Scientists are able to obtain good information from a corpse soon after death, by taking photographs, measuring temperature, observing rigor mortis and any wounds, and conducting various other tests on the tissue. With increasing passage of time, however, the tissue degenerates, and it is more difficult to obtain reliable data. Because the life cycle of insects is known, and the effects of temperature and weather can be factored in to the equation, careful collection of insects at the scene can provide useful estimate of the PMI. Empirical work in the laboratory has established standard growth times for many of the most common c arrion feeding species, and this means that the determination of PMI has become the most used application of forensic entomology in modern crime scenes (Nabity et al. 2006, p. 1276). Another useful piece of information that can be obtained from examination of species present in a corpse is the whether or not the body has been moved.