"Determination of dissociation constant for a weak acid by using spectrophotometer" Essays and Research Papers

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    Folic Acid

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    Folic Acid is a B vitamin‚ specifically B9. It is an essential nutrient required by the body to create healthy new cells. While we hear about it mostly in regards to pregnancy‚ it is important to understand that the need for folic acid goes even beyond this. Folic acid is essential for the body to create red blood cells which in turn prevents anemia. It is also plays an important role in the metabolism of homocysteine‚ an amino acid. The recommended dietary allowance (RDA) for all men and women

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    Error Analysis: Force constant in springs Maria Loraine Menorca National Institute of Physics‚ University of the Philippines Diliman‚ Quezon City lorainemnrc@gmail.com Abstract This experiment aims to fully understand the analysis of possible errors in the measurement of the force constants in different spring systems. Springs can be utilized to store and release energy. According to Hooke’s Law‚ the response of a spring to external forces is characterized by the equation F = -kΔx. In this experiment

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    Citric Acid

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    Niacin (vit. B3) 0.282 mg (2%) Pantothenic acid (B5) 0.25 mg (5%) Vitamin B6 0.06 mg (5%) Folate (vit. B9) 30 μg (8%) Choline 8.4 mg (2%) Vitamin C 53.2 mg (64%) Vitamin E 0.18 mg (1%) Calcium 40 mg (4%) Iron 0.1 mg (1%) Magnesium 10 mg (3%) Manganese 0.025 mg (1%) Phosphorus 14 mg (2%) Potassium 181 mg (4%) Zinc 0.07 mg (1%) Since orange is a citrus fruit‚ it has  0.005 mol/L citric acid. Citric acid is a weak organic acid with the formula C6H8O7. It is a natural preservative/conservative

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    Amino Acids

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    Amino acids are the building blocks of proteins. Amino acids bind together to form polypeptide chains‚ and these polypeptides fold and coil together into specific conformations to form proteins. There are 20 different amino acids‚ each amino acid consisting of four distinct partners. The first is a carboxyl group. A carboxyl group has very weak acids that are able to donate hydrogen ions to biological reactions. The second partner is the amino acid group. Amino acid groups act as the base which‚

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    Stress: A Constant Challenge

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    Chapter 2: Stress: The Constant Challenge DEFINITIONS stress response The physiological changes associated with stress. stress The collective physiological and emotional responses to any stimulus that disturbs an individual’s homeostasis. autonomic nervous system The branch of the peripheral nervous system that‚ largely without conscious thought‚ controls basic body processes; consists of the sympathetic and parasympathetic divisions. parasympathetic division A division of the autonomic

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    Pip's Determination

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    continually shows us his determination. Pip had fallen for a girl who was in a higher class than himself. He was determined to learn to read and dress of a higher class so that he could impress Estella‚ Miss Havisham’s adopted daughter. Estella was a rude upper-class woman who continually demeaned Pip. Through all the offensive remarks made towards him‚ he still stopped at nothing to impress her and win her heart. He was a very hard-working man‚ and through his hard work and determination‚ he became wealthy

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    Profit Determination

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    Profit Determination Prepared by John Hoggett and Clare Innes Measurement of Profit • Cash basis • Cash income received - Cash expenses paid – Revenues recorded when received – Expenses recorded when paid • Accrual basis • Profit = Income (incl. Revenues) - Expenses – Revenue is recognised when the anticipated inflow of economic benefit can be reliably measured – Expenses when the consumption of benefits can be reliably measured 2 Adjusting Entries • The need for adjusting entries-

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    Nucleic Acid

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    Farrell cengage.com/chemistry/campbell Chapter Nine Nucleic Acids: How Structure Conveys Information Paul D. Adams • University of Arkansas Nucleic Acids • Nucleic acid: a biopolymer containing three types of monomer units • a base derived from purine or pyrimidine (nucleobases) • a monosaccharide‚ either D-ribose or 2-deoxy-D-ribose • phosphoric acid • RNA (Ribonucleic Acid) • DNA (Deoxyribonucleic Acid) Nucleic Acids • Levels of structure • 1°structure: the order of bases on

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    Acids, Bases & Buffers

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    Title: Acids‚ Bases & Buffers Objectives: 1. To understand the acid-base chemistry. 2. To prepare and evaluate a buffer system 3. To measure the buffering capacity of two types of isotonic drinks. Introduction: There are acid-forming‚ basic forming and neutral food‚ however the acid or alkaline properties of a food is unable to judge by the actual acidity of the food itself. For example‚ citrus fruits such as lemon are acidic‚ but they are alkaline-forming when we consume and digest it. Therefore

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    Finding the Optimal pH of the Enzyme Peroxidase with the Aid of a Spectrophotometer ABSTRACT The peroxidase enzyme was partially purified‚ and the enzyme activity was calculated with the use of a spectrophotometer‚ demonstrating the effect of pH on peroxidase activity. The objective of this exercise was to determine the ideal pH for peroxidase activity. The data concluded that the optimum pH for peroxidase activity is 5‚ and the “standardized” enzyme volume is 2.8mL

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