Genetically Modified Foods Essay Example | Topics and Well Written Essays - 1750 words

Genetically Modified Foods - Essay Example   Currently, a broad-based scientific consensus exists over foods in the market, which have been derived from genetic modifications that they have no threats and health concerns on the life of humans and other beings that consume them. However, some opponents to the idea of genetic modification have refuted these concepts, basing their arguments on various safety issues, economic and environmental concerns. They have emphasized that the economic concerned raised about these foods emanate from the fact that the genetically modified seeds are foods sources, which are subject to the intellectual property rights as owned by the respective corporations that make them (Rotman, 2014).Plants that have been genetically engineered are often generated from the laboratory through alteration made in their genetic compositions and tested effectively if they contain the desired qualities. In most cases, this happens through the addition of one or many genes in their particular genomes by use of g enetic engineering methodologies. Some of the plants that are genetically modified are done in certain controlled ways through the addition of more genes in a process called cloning or some genes are subtracted from them.Nowadays, genetic modification is often carried out in order to make plants resistant to insects, viri, fungi and herbicides. Additionally, these modifications are also aimed at changing the nutritional content of these plants, improving their taste and duration for storage after harvest.

The development of petroleum refinery Essay Example | Topics and Well Written Essays - 500 words

The development of petroleum refinery - Essay Example of the first oil well in 1859 at the state of Pennsylvania where developing larger-scale processing systems were sought to refine massive quantities â€Å"rock oil†. Basically, petroleum refinery is established to perform the core duty of fundamental distillation by which the components of ‘crude oil’ are separated into fractions when crude oil is heated in the distillation column after which different hydrocarbon products may be obtained at varying temperatures. Under low temperatures conditions, light distillates at the top of the column include liquid petroleum gases (LPG), ‘straight run’ gasoline, and naphtha. Out of the middle streams are recovered moderately heavy products such as kerosene and jet fuel whereas the through column’s bottoms are distilled the heaviest of yield being the residual fuel oil. Since production is chiefly concerned with an optimum output, schematic plant and equipment designs for refinery are developed such that desired products are maximized at minimum operating costs as much as possible. On this ground, certain refineries customize plant structure in such fashion as to recycle streams particularly those at the bottom to be fed back to lines where lighter products are processed in order that heavy distillates may be taken advantage of further upon conversion to less heavy form. Manufacturers may also opt to decide on the feasibility of adjusting other factors that directly or indirectly impact the efficiency of distillation such as the number of column plates or stages, the type, design, or number of auxiliary equipments used if necessary, and more essentially, a strategic approach with separating components to remedy relatively close boiling points for the purpose of increasing percent purity of the desired yield. Moreover, refineries of crude petroleum have become enhanced through a system of downstream processing facilities utilized to change the molecular structure of the input whether by catalytic or non-catalytic