the oxidation of iron sulfide. The oxidation occurs when iron sulfide is exposed to the air or to dissolved oxygen in the water, which causes the iron to rust and the sulfur reacts with the water to forum sulfuric acid (Coil, D., McKittrick, E., and Higman, B., 2010). Figure 2 illustrates the sulfuric acid that is formed. Acid mine drainage is most common with hardrock mines where metal ore is bound together with sulfur. The increased acidity created from acid mine drainage has a series of negative
Before fire was discovered wheat was most likely chewed and later pulverized into a grit-like powder. This powder was then mixed with water to make a thick paste that was then heated over a fire or on a hot stone to create a type of flatbread similar to today’s cracker. It is believed that the domestication of wheat directly influenced the transition of human history between nomadic, and sedentary and domesticated lifestyles. The earliest breads were most likely similar to porridge and or were sun-dried
between gasification and combustion. When a feed gasfire, the oxygen or air is injected in small amount allowing part of the feed to burn completely which supply the required heat and pressure, then, the heat will break down the feed into synthesis gas (Higman & Burgt, 2003). This process consists of six main reactions: Table 1: Gasification main reactions Reaction Process Chemical Formula Change in Enthalpy Gasification with Oxygen C + ½ O2 → CO –3,922 Btu/lb C Combustion with Oxygen C + O2 → CO2 –14
HIS294Y Thursday February 7th 2006 Book Report: Capitalism & Slavery, Eric Williams "Capitalism & Slavery," (published by The University of North Carolina Press, 1994) was written by Eric Eustace Williams and first published in 1944. Eric Williams' book, was at the time of its publication, considered years ahead of its time. It should be noted, early on within this report that, literary works on the history of the Caribbean or slavery for a matter of fact, was done by Europeans. In the
The effects of European colonization can still be seen today. It can be seen physically in the landscapes of the islands of the Caribbean, and mentally it is still present in some of the inhabitant’s minds. Political struggles should not be ignored as well as many islands have struggled since their independence. Today when many Europeans look back at the peak of their country’s empires they see the Caribbean as a contributing factor. While there is no question as to the wealth generated by the control
the Americas gave the world, by Nelson Foster and Linda Cordell, 1-14. Tuscon: University of Arizona Press, 1992. Edward, Peter. Prince Henry "the Navigator": a life. London; New Haven; Yale: Yale University Press, 2000. Engerman, Stanley, and Barry Higman. "The Demographic Structure of the Caribbean Slave Societies." In The slave socities of the Caribbean,
The current market pressures to produce for a globalized market with fixed requirements of consistency, quantity and quality, have provoked the reduction of the diversity of crops in the Andes region (Hellin and Higman, 2005). Mainly, these forces are the result of the neoliberal movement in Peru, which has envisioned to foment large scale production for agroindustry and foreign markets (Crabtree, 2002). Also, another major threat to the Peruvian ecosystem is a
their superior weapons, the Indigenous rivalries, native superstitions, and the aid of black slaves. The greatest factor for the Spanish’s conquest of the Americas was the appearance of old world diseases in the new world. In his text First encounters Higman agrees, “People of the Caribbean suffered heavily when first exposed to diseases endemic in Europe and Africa but unknown in the Americas. The most deadly was smallpox, but influenza, measles, malaria, yellow fever, typhus, and the bubonic plague
"Capitalism & Slavery," (published by The University of North Carolina Press, 1994) was written by Eric Eustace Williams and first published in 1944. Eric Williams ' book, was at the time of its publication, considered years ahead of its time. It should be noted, early on within this report that, literary works on the history of the Caribbean or slavery for a matter of fact, was done by Europeans. In the preface of his book, Williams clearly asserts that his work, "is not a study of the institution
also built windfarms in Washington, Wyoming, Nebraska, Texas to benefit Indian reservations and surrounding areas. CIRI is working on a project to build an underground coal gasification plant that reduces the impact of coal mining (Coil, McKittrick & Higman, 2014). o Profit: CIRI did a bid on a surplus of government land that came with oil and gas, resulting in petroleum revenues. CIRI’s businesses include real estate (mostly apartment complexes), communications, tourism, support services, oil and mining