Water vapor

the most basic exploited preservation strategies. Water activity is defined as the ratio of water vapor pressure of the food substrate to the vapor pressure of pure water at the same temperature. The water activity can be manipulated in foods by a number of means, including addition of solutes such as salt or sugar, physical removal of water through drying or baking, or binding of water to various macromolecular components in the food. The water activity for optimum growth level of most…

Bible water is mentioned. Genesis 1:2 describes “the earth… formless and empty, darkness was over the surface of the deep, and the Spirit of God was hovering over the waters.” Before anything else, water was the only thing existing on earth, validating its importance to the earth and mankind. Water is so important that it is referenced over 722 times in the Bible. All living creature’s depend on water to survive, since their mass is made up of 70-90% water. The continuous movement of water…

room temperature so to increase the reaction rate it was heated under reflux. During reflux the solvent is heated to a boil and to ensure the vapors were not lost they were cooled in a condenser, which had cold water running through it. These cooled vapors condensed and returned to the boiling…

Raindrops break the speed limit Did you know that raindrops have speed limits of their own? Raindrops that are larger than 0.5 millimeters when going across fall with a terminal velocity of several meters per second, while smaller drops fall slower with a terminal velocity of less than one meter per second. Terminal Velocity is when friction cancels the downward pull of gravity. This means that the raindrops speed up and keep falling at a steady pace. Michael Larsen, an atmospheric…

leaves of Aloe vera with a length of (55 - 80) cm were selected from the plants and washed with water. The tapering point of the leaf top and the short sharp spines located along the leaf margins were removed by a sharp knife and then the knife was introduced into the mucilage layer below the green rind avoiding the vascular bundles. The top and…

It is insoluble in water and soluble in chloroform and other chlorinated hydrocarbons. It exhibits good barrier properties against oxygen and compared to other biopolymers. It possesses better physical properties than polypropylene for food packaging applications. (Chaijamrus & Udpuay, 2008) As a homopolymer, PHB is highly crystalline (50%-70%). It is an important characteristic of a polymer in order to regulate the mechanical properties of the material. The value of water vapor transmission…

on the temperature of boiling water. Each time I added more salt the temperature was higher than the last one. From the data I collected it shows that the more salt you add the higher the temperature. If you add salt to boiling water the temperature will increase. The data collected shows that my hypothesis was correct because the average number of the different amounts of salt was higher than the last one. Water boils when the molecules are able to overcome the vapor pressure of the surrounding…

following definitions. • Surface water-Water from lakes, streams, rivers, and surface springs (Friis, 2012, pg. 211). • Groundwater- Any water that is stored naturally deep underground in aquifers or that flows through rock and soil, supplying springs and wells; this water is less susceptible to contamination than surface water (Friis, 2012, pg. 211). • Hydrology- is the scientific study of the movement, occurrence, circulation, distribution, and properties of the water on earth and its…

considerable amount of water which is commonly called sap. Water is contained in wood as either bound water or free water. The bound water is held within cell walls by bonding forces between water and cellulose molecules, while the free water is contained in the cell cavities and is not held by these forces. The amount of water in wood can be calculated and expressed as a percent of the dry weight is called the “Moisture Content” (MC). The hygroscopic nature of wood cause the water movement,…

causing considerable damage to the region in this August 2016. It’s true that a large portion of Louisiana is made up of lowlands prone to flooding, but this instance was particularly noteworthy because of the power of the weather and the magnitude of water deposited. The floodwaters beat record highs by as much as 5 feet in some areas, and thousands of people were left without homes. The recovery period is not expected to be quick, as Louisiana’s geography does not allow for easy drainage.…