Mark Waters

public. My name is Erin McDonnell and I will be talking to you about how there should be mandatory swimming lessons and water safety education taught in both primary and secondary schooling. Firstly, the roll-out of compulsory lessons would be extremely beneficial for kids as the increase in drowning in young adults aged 15-24 years old is linked to a fall in the swimming and water safety skills of children over the past 10 years. In primary schools this year, nearly 50,000 children will…

because it contains a pigment molecule known as flavin. This means that it changes colours depending on the quantity of hydrogen ions in the solution. The red cabbage can produce red, purple or blue juice. The colour it produces depends on the pH of the water it has been mixed with.…

2015). The finding of optimum salinity conditions for each species will increase fish productions and brackish water areas will be used more efficiently. Several studies indicate that marine fish grow rapidly on isosmotic water salinity of 10 to 15 (Imsland et al., 2008; Arjona et al., 2009;…

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,…

Chitin is the second most abundant natural polysaccharide consisting of β(1→ 4)-linked N-acetyl-D-glucosamine (GlcNAc) units in a linear form. Chitin is insoluble in water and mainly exists in two crystalline (α- and β-) forms. The α-chitin consists of sheets of tightly packed alternating parallel and antiparallel chains (1) and is abundant in the exoskeleton of arthropods, insects, fungi, and yeast cell walls. The chains are arranged in parallel orientation in β-chitin (2), which occurs less…

An absorbable suture is defined as a surgical suture material prepared from a substance that can be dissolved by body tissues and is therefore not permanent [1]. Any suture, which loses its tensile strength within 60 days, is considered an absorbable suture. The ideal absorbable suture has high tensile strength, low reactivity, good security and delayed absorption time. They can be classified as natural absorbable sutures or synthetic absorbable sutures. The only natural absorbable suture is…

Hohn et al. (1986) described a water column up to 1.70 m. In the present study, there was a greater tendency of accumulation of fine material, with little concentration of carbonates, at the highest depths. As expected, the accumulation of fine sediment was also associated with higher concentrations of organic matter. The results obtained in the bathymetric survey showed occurrence of a sedimentation process in this lagoon. Some physico-chemical parameters of the water column were determined by…

BSE, the E-coli virus were not confined to a single region or country, nor do they spread out to certain social groups in society exclusively. It is widely known fact that, environmental hazards have no boundaries and are universalized by water, air, food chains and winds. Therefore, the question is who is not worried about the environment? It is obvious that everyone should be concerned of the environment in which we live, whether rich or poor, developed or developing nations. This knowledge of…

mustard seeds. Mustard oil is obtained by cold compression of the mustard seeds and by infusing this extracted oil with other oils to get the final product. Essential mustard oil is obtained by grinding the mustard seeds. These are then mixed with water and oil is obtained by the process of distillation. All varieties of mustard oil are yellow in color and have a distinct aroma and a pungent smell. What does mustard oil contain? Mustard…

Distillation is the most widely used separation process in the chemical industries. The separation of mixtures by distillation depends on the relative volatilities between the components. The greater the relative volatilities, the easier the separation. DME can be used as an alternative raw material when it is converted to gasoline. The DME is converted to gasoline range hydrocarbons over a zeolite catalyst. In the gasoline production reaction, some reactions cause unwanted components which may…