Sargassum latifolium samples were collected during late spring from the intertidal zone of Hurghada, Egypt (27° 12′ N, 33° 50′ E). The macroalgal biomass was air-dried and milled in a home blender. 1.1. Alginate extraction In the extraction process, milled seaweed biomass (1.5 % w/v) was acidified with 2 % citric acid solution with shaking (200 rpm) for 2 h at room temperature. The residual biomass was separated by filtration and washed with distilled water.
His life has never been described of embodying hip-hop, until only recently. Alexander Hamilton is finally getting the recognition he lacked and deserved during his time. This is all due to Lin Manuel Miranda’s masterpiece, Hamilton, an American musical. As often pointed out in the musical, Hamilton commonly is clashed in with the other founding fathers, most just know him for fixing the nation’s economy. Though his accomplishments go far beyond fixing the banks and stabilizing the nation’s economy.
In the mid-nineteenth century, petroleum, increasingly used as a machine lubricant, and kerosene a by product of crude oil (unrefined petroleum), proved to be an impressive source of lighting. Discoveries in petroleum along with innovations in electricity will facilitate many other inventions throughout the Second Industrial Revolution. Another way that the Second Industrial Revolution transformed America, was through technological advances in communication. Notably, railroad propelled the advancement of the electric telegraph machine. Telegraph and railroad lines inseparably bound together as telegraph poles dotted the span of railroad networks.
Reverse Osmosis technology only accounted for 7% of Abu Dhabi’s capacity in 2011 (Hamdan, 2014). The advantage of using MSF technology is that it has a large capacity and high reliability and is economical in terms of consumption of energy required for the desalination
Sulphuric acid One of the most important chemicals used in the industrial revolution was sulphuric acid (H2SO4), as it had many different uses in textile and metallurgical industries. Due to its importance, it was in high demand and the amount which could be produced was constantly trying to be improved.It was during this period that a scientist by the name of John Roebuck discovered that this chemical could be produced at a much larger scale than once thought. He did this by making small changes to the production method. Up until now the chemical had been produced in glass bottles by reacting sulfur with potassium nitrate, or saltpeter as it was more commonly known, with steam. The potassium nitrate acted as an oxidizing agent, oxidizing
He was mathematician, code breaker and computer scientist. He was not writing the paper with bias, but he did have some ignorance. Computer science as a subject was not much explored until after the mid 1970’s. This means that he was a full quarter century ahead of his time and there was a lot more to learn than what he had already discovered and hypothesized. He was not paid by any company to write the paper, he just wanted to publish his newest idea.
The ocean doesn’t only absorb the sun’s radiation and store it, it also helps distribute all the heat it stored around the globe. This process is called evaporation which takes many steps to do. Ocean water is constantly evaporating which is increasing the temperature of the surrounding air to form rain and storms which then they get carried by the winds. How the oceans evaporated is by the sun which is a part of how the heat get distribute around the globe and the wind helps
The flood story is based on the geologic ages identified through scientific understanding of the changing physical features of the earth (Origin myths: The Flood, 37). The period is between about 12,000 and 7000 BCE which was a period of worldwide warming (Origin myths, 37). Changing environmental conditions was common throughout the world. The rainfall and ocean levels rose some 300 feet (Origin myths 37). Some people began to believe their creator was punishing humans who were displeasing, so the Great Flood become part of the origin myth.
Reported methods used for six membered oxygen and nitrogen ring synthesis have their own advantages and disadvantages. Therefore, development of new and efficient methods is imperative especially to address the issue of diastereoselectivity. Among these methods stated, this thesis mainly discusses Prins, aza-Prins cyclization and HDA reactions in detail for the construction of six membered O- and N- heterocycles. 1.3.1. Prins Cyclization Reaction In 1919 a Dutch chemist H. J. Prins has first reported
He has been a great life changer, literally life changer. Jonas Salk 's was the first inventor of the Polio Vaccine. (salk announces polio vaccine.) It was a great invention until Sabin improved it. Salk 's was a really brilliant guy and he made lots of people feel so much better.