INTRODUCTION Solar energy is an inexhaustible resource. The sun produces vast amounts of renewable solar energy that can be collected and converted into heat and electricity. Texas, due to its large size and abundant sunshine, has the largest solar energy resources among the states. Several other states, however, lead the nation in terms of using solar energy, mostly due to state policies and incentives that encourage the installation of solar energy systems. California is the nation's larges...
Results: Identify and mark the signals in the spectra and note the chemical shift values of the methyl resonances in aspirin and caffeine and the methylene resonance in s-trioxane. Using above expression, calculate the weight of aspirin and caffeine in one tablet, and the percentage w/w of each component in one analgesic tablet. Whole tablet weighed = 0.501 Half tablet weighed = 0.270 Mass of s-trioxane = 0.05 RMM of aspirin = 180 RMM of caffeine = 194 RMM of s-trioxane = 90 No. of moles of c...
1. Introduction 1.1 Atlantic Herring (distribution, character and biology) Norwegian spring spawning herring (NSSH, Clupea harengus) is one of the family from Clupeidae which are distributed over wider areas and one of the most abundant species in the world ( Nakken, 2008). Since NSSH playing an important role for Norwegian economy, the stocks was been highly exploited for commercial purpose which come out with bad impact to the ecosystems. Furthermore, changes in environmental condition also...
Abstract Chemical Enhanced Oil Recovery (EOR) processes received more attentions nowadays. Crude Terephthalic Acid (CTA) as a chemical compound is used for flooding here as an alternative to the traditional hydrolyzed polyacryl amide (HPAM). Crude Oil samples from an Iranian oil field were used during the flooding tests. Sand packed models using two different sizes of sand mainly 50 and 100 meshes were employed in this investigation. A comparison between water flooding and CTA flooding as a s...
Introduction Background Sludge is produced as a bypass product of a water treatment process. The sludge is commonly disposed on land, but this result as a health hazards and adverse effects on the ecosystem. All metals above certain concentration have side effects to human being. Among the most hazardous heavy metals are Cardium, Lead, Mercury and hexavalent Chromiun, the first three being toxic at all concentration and have not a known biological function (Moeletsi et al, 2004). When consume...
Introduction Enzymes:Enzymes are single or multiple -chain proteins that act as a biological catalysts with the ability to promote specific chemical rxn under the mild condition that prevail in most living organism. Over-view of Enzymes catalysts All reaction in the body are mediated by enzymes, which are protein catalysis that increase the rate of reaction without being changed in overall process. Among the many biologic reaction that are energetic possible, Enzyme selectively channel reacta...
Pool chemistry is the application of chemistry to maintain safe and clean water (Hann, 1997). This is achieved by regulating numerous factors which include: the pH, the quantity of disinfectant and the buffers used to resist pH changes. The normal pH range of a swimming pool needs to be between 7.2 and 8.0, although a range between 7.2 and 7.8 is more practical as some disinfectants such as chlorine are most effective for this range (Hann, 1997). The Importance of pH The pH scale (see figure ...
INTRODUCTION In today's highly competitive and global marketplace, the pressure on organizations to find new ways to create and deliver value to the customers grows even stronger. Market development combined with new sources of global competition has led to over-capacity in many industries. Putting an incredible pressure on price, as often is the critical competitive variable. This leads to the need of more effectiveness and efficiency inside a business. It is against these new conditions tha...
Phosphorus (P) is an essential nutrient element for the growth of living organisms including plants, animals and microorganisms. It is a component of the adenosine triphosphate (ATP) that drives most energy-requiring biochemical processes, deoxyribonucleic acid (DNA) that is the seat of genetic inheritance, ribonucleic acid (RNA) that directs protein synthesis in plants and animals, phospholipids that compose cellular membranes and intermediate compounds of respiration and photosynthesis (Bra...
Aim: To investigate how the rate of reaction between Sodium Thiosulphate and Hydrochloric acid is affected by changing the concentration. Background: THE REACTION: when Sodium Thiosulphate reacts with hydrochloric acid sulphur is produced. The sulphur forms in very small particles and causes the solution to cloud over and turn a yellow colour. This causes the cross to fade and eventually disappear. Sodium Thiosulphate + Hydrochloric acid »» Sulphur + Sodium Chloride + Sulphur Dioxide + Water ...