CHAPTER I THE RESEARCH PROBLEM BACKGROUND OF THE STUDY Now days, exporting is hard in the Philippines hence the country is not that good in means of transportation because of the gap between the islands and provinces; and not all places have good roads. This …
Attention Getter: There are currently 442 active nuclear power reactors worldwide according to the Nuclear Energy Institute. Of all of the reactors worldwide, 14 have been classified as accidents where the public has been exposed to radiation. The most devastating of these incidents was the …
Hydrogen peroxide is a bleaching agent with antimicrobial effects [Gaffar, 1997] that has been used historically, at high concentrations, for the treatment of severe gingivitis. It is an effective bleaching agent that can penetrate enamel to bleach intrinsic stains. Papain is a naturally occurring enzyme …
Quantitative Chemistry –Titration Determination of the Molarity of an Unknown Solution through Acid-Base Titration Technique 1. Introduction 1. 1 Aim The aim of this investigation was to determine the precise molarity of two (NaOH(aq)) sodium hydroxide solutions produced at the beginning of the experiment through …
Using the graph, estimate the time at which 50 percent of the leaf disks were floating on the surface. The point at which 50 percent of the leaf disks are floating will be you point of reference for future investigations Using the graph the estimated …
The Effect of Starch on the Activity of Amylase with pH Variable Lab Report, Fall 2011 East Tennessee State University Department of Biological Sciences By: Shelby Brackett Date Performed: October 10, 2011 Lab Instructor: Joseph Kusi Biology 1111, Section 018 Abstract Enzymes are very important …
Marisela Andrade The Effects of Salt Water on Gummy Bears Facilitated diffusion depends on passive transport. Molecules cross cell membrane by diffusion. A type of diffusion is osmosis. If no energy is input into the system during diffusion, the molecules will reach a state of …
You are what you eat. But do you recall munching some molybdenum or snacking on selenium? Some 60 chemical elements are found in the body, but what all of them are doing there is still unknown. Roughly 96 percent of the mass of the human …
Abstract To feed on materials that are healthy for them, flies (order Diptera) use taste receptors on their tarsi to find sugars to ingest. We examined the ability of blowflies to taste monosaccharide and disaccharide sugars as well as saccharin. To do this, we attached …
Describe the fluid-mosaic model of a plasma membrane. Discuss the role of the membrane in the movement of materials through it by each of the following processes: Active transport Passive transport The plasma membrane is a semi permeable barrier that separates the inside of the …
STEREOCHEMISTRY: ADDITION OF BROMINE TO trans-CINNAMIC ACID Required Prelab Readings:McMurry Chapter 5, Sections 8. 2 & 21. 2 Morhig, Sections 7. 1 and 7. 3. Previous techniques that you must know and be able to perform: Suction Filtration and Melting Point This experiment is designed …
Natural products isolated from various sources especially derived from plants, have long been used in treatment of human ailments. For long time, the approach to new drugs through natural products was proved to be the single most successful approach for the discovery of new drugs. …
Triphenyl tetrazolium chloride (also known as T.T.C) is an example of an artificial hydrogen acceptor. It is a redox indicator which is colourless when oxidised, however when reduced, it produces a red, insoluble precipitate called ‘formazans’. T.T.C can therefore be used to investigate the enzyme …
Benzene is a chemical compound of the hydro-carbon group. It is a colorless liquid with a characteristic odor and burning taste, formula C6H6. The benzene molecule is a closed ring of six carbon atoms connected by bonds that resonate between single and double bonds; each …
The Roles of the Nephron of the 120 ml of blood that is filtered by the kidneys each minute, only I ml (that’s less than I%) turns into urine that will eventually leave the body (after approximately 300 – 400 mis of it accumulates to …
Determination of the Concentration of Acetic Acid in Vinegar Lab Exercise 4 CHEM 1106 9/19/12 Purpose: Standardize a sodium hydroxide solution using a primary standard acid. Determine the molarity and the percent by mass of acetic acid in vinegar by titration with the standardized sodium …
Abstract: This two part experiment is designed to determine the rate law of the following reaction, 2I-(aq) + H2O2(aq) + 2H+I2(aq) + 2H2O(L), and to then determine if a change in temperature has an effect on that rate of this reaction. It was found that …
Theory: Photosynthesis is a process carried out in plants, in the photosynthetic organ which is the leaf. CO2 + H2O –> (CH2O)n + O2 A plant takes in CO2 and H2O and absorbs sunlight in order for photosynthesis to take place. These reactants then travel …
Investigation of the point of incipient plasmolysis of onion cells (Allium cepa) using NaCl (Sodium Chloride) concentrations of 0. 1M, 0. 2M, 0. 3M, 0. 4M, 0. 5M, 0. 6M Design Research Question (Aim): The aim of this lab was to determine the point of …
Experiment 9 and 10: Volumetric/Vinegar Analysis Abstract: The goal of the experiment that was conducted was to figure out both the molar concentration of NaOH and the standard mole ratio of the NaOH solution. In order to find the concentration of the NaOH solution, volumetric …
Contamination of the environment by heavy metal is becoming the major global issue (Chauhan &Chauhan, 2014). Heavy metals have an atomic density greater than 4g/cm3 which are often detected at different concentrations level in various environmental mediums. Because of their direct and indirect toxicities to …
Everything is made up of tiny particles called atoms. The atoms are made up of even smaller parts called protons, electrons and neutrons. Protons have a positive charge (+), electrons have a negative charge (-) and neutrons have no charge at all, they are neutral. …
From many experiments, Thomson had certified that cathode rays carry negative charge and identified the cathode rays inside vacuum tubes as being electric currents composed of these tiny electrons (Hamblin, 2005). It was the crucial first step in the development of the twentieth-century concept of …
Benjamin Foster Physiology 10/23/2012 Case Study 1 (Too much of a good thing)) The definition of OSMOSIS is the movement of a solvent through a membrane separating two solutions of different concentrations. The solvent from the side of weaker concentration usually moves to the side …
Antoine Lavoisier was born in the year 1743 to a wealthy family and inherited a huge fortune at the age of five after the demise of his mother. A noble man by profession has contributed a lot in both chemical and biological science. Antoine Lavoisier …
EXPERIMENTAL SCIENCE PROJECTS:The Effect of Salt on the Boiling Temperature of Water(Initially prepared by a 4th Grade student)To quickly jump to a section below click on:INITIAL OBSERVATIONCooking instructions tell you to add salt to water before boiling it. PROJECT TITLEThe Effect of Salt on the …
Today there is much advancement in the cosmetic world. There are also many scientist (that go back to the ancient Romans) that have invented and experimented with chemicals to produce what we know have today. Eugene Schueller is one of those chemists that helped advance …
Heat does to matter is changes it state. There is something more subtle though that can cause big problems. Look at this devise. When you heat both this ball and the ring the ring expands like a long bar of metal. The ball expands less …
2.0 Literature Review 2.1 River Water Quality in Ireland National studies of Irish rivers have been carried out since 1971. In 1971, 2,900km of the river channel was surveyed. The studies consisted of chemical and biological appraisals. This was before the constitution of the Environmental …
Abstract This experiment is to determine the concentration of oxidizing solution using the iodine/ thiosulphate titration where the reducing solution is potassium iodate solution and the oxidizing solution is sodium thiosulphate solution. Potassium iodate solution which is an oxidizing agent is added into an excess …
Conjugation
The word "conjugation" is derived from a Latin word that means "to link together". In organic chemistry terms, it is used to describe the situation that occurs when π systems (e.g. double bonds) are "linked together". An "isolated" π (pi) system exists only between a single pair of adjacent atoms (e.g. C=C)
Kinetic energy
Kinetic energy is the energy associated with objects in motion. Potential energy is the type of energy associated with an object's potential to do work. Chemical energy is the type of energy released from the breakdown of chemical bonds and can be harnessed for metabolic processes.
Physics
Chemical physics is concerned with the application of the concepts and theories of physics to the analysis of chemical systems and their physical behaviour. While also at the interface between physics and chemistry, it is distinct from physical chemistry.
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