Chemical Structure Of Polyurethane

Local and international exhibitors use Big 5 as strategic platform for new ...

The Middle East continues to be a strategic choice for both local and international companies to launch new products and technologies into the construction market. The region's ambitious and world-leading construction projects are driving the need for continual development in construction technology due to the challenging designs and drive for sustainability within the sector. "We are delighted The Big 5 continues to be recognized as one of the most important platforms for new product launches and the unveiling of innovative new technology in the construction industry," commented event director for The Big 5 2011, Andy White. "We have consistently identified product development and innovation as key to driving the industry forward, and have consciously developed The Big 5 to provide both formal and informal opportunities to bring this knowledge to the market. This is why we are focusing on product led, free seminars for attendees this year as regional and international businesses need to be aware of, and embrace, new technologies. These developments within the sector can enable lower construction costs, provide more sustainable methods of construction and result in safer, more rigorously regulated buildings that are the key to a safe, profitable future in the construction industry. 2011 is going to be an exceptionally exciting year for The Big 5, we're anticipating a record number of product launches in the region." The Big 5 2011, held at the Dubai International Exhibition and Convention Centre from 21-24 November, will be providing over 80 product led seminars designed to ensure that information on the latest industry innovations and developments is available to all. Early indications show that companies from wider Gulf countries, Europe and Japan are using The Big 5 as a launch platform for their latest products and technology.

Wax (Origins and Composition)

[: Chemically, a wax is a type of lipid that may contain a wide variety of long-chain alkanes, esters, polyesters and hydroxy esters of long-chain primary alcohols and fatty acids. They are usually distinguished from fats by the lack of triglyceride esters of glycerine (propan-1, 2, 3-triol) and three fatty acids. In addition to the esters that contribute to the high melting point and hardness of carnauba wax, the epicuticular waxes of plants are mixtures of substituted long-chain aliphatic hydrocarbons, containing alkanes, fatty acids, primary and secondary alcohols, diols, ketones, aldehydes .Paraffin waxes are hydrocarbons, mixtures of alkanes usually in a homologous series of chain lengths.] [1] Waxes are natural substances (animal or vegetable) or synthetic materials solid at ambient temperature (20C.-25C.). They are insoluble in water, soluble in oils and are capable of forming a water repellant film. These include Carnauba wax (extract of Copemrica Cerifera), Candelilla wax (extract of Euphobies Cerifera and Pedilantus pavonis), and Alfa wax(extract of Stipa tenacissima), Montan wax, polyethylene wax, paraffin wax, oxidized paraffin wax, ozokerite, vegetable waxes such as olive tree wax, rice wax, hydrogenated jojoba wax or absolute waxes of flowers such as the essential wax of cassis flower; animal waxes such as beeswax, or modified beeswax (cerabellina). Wax specifications such as melt point, penetration, and oil content are controlled primarily by the amount of solvent added, the rate of cooling and the temperature from the crystallization process. Additional compounds are added (resins, polymers etc) to give specific properties to the wax such as durability, flexibility and gloss. Waxes form a broad category of organic (contain carbon) materials that don't fall into any one chemical family but are generally classed as lipids.

Of mice and men

The tragic story of the friendship between two migrant workers, George and mentally retarded Lenny, and their dream of owning a farm

Three cups of tea, one man's mission to fight terrorism and build nations-- one school at a time

Traces how the author, having been rescued and resuscitated by Himalayan villagers after a failed attempt to climb K2, worked to build schools that would ...

Art of War

While appreciative of the philosophical richness of the Art of War, this edition stresses Sun-tzu's practical origins and presents a translation that is both ...

The elements of style

Offers advice on improving writing skills and promoting a style marked by simplicity, orderliness, and sincerity.

In defense of food, an eater's manifesto [additional copies -- 2]

Cites the reasons why people have become so confused about their dietary choices and discusses the importance of enjoyable moderate eating of mostly traditional ...