from wood‚ a chemical pulping process separates lignin from cellulose fibers. This is accomplished by dissolving lignin in a cooking liquor‚ so that it may be washed from the cellulose fibers. This preserves the length of the cellulose fibers. Paper made from chemical pulps are also known as wood-free papers–not to be confused with tree-free paper. This is because they do not contain lignin‚ which deteriorates over time. The pulp can also be bleached to produce white paper‚ but this consumes 5% of
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INTRODUCTION TO CHEMICAL BONDS CHEMICAL BOND Definition: A chemical bond is defined as a force that acts between two or more atoms to hold them together as a stable molecule. Main types of bond: 1. Ionic or electrovalent bond‚ 2. Covalent bond‚ 3. Coordinate covalent bond Forth type of bond: Metallic bond: The type of bonding which holds the atoms together in metal crystal. Valence electron: The electrons in the outer most energy level in an atom that takes part in chemical bonding
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When people grow they change‚ some for the better and some for the worst. People have changed all throughout history as they go and experience adventures or do something dramatic in their life. In the story Huckleberry Finn by Mark Twain‚ a young boy‚ named Huck transforms and changes into an adult. Twain shows how Huck’s morals change as he escapes from his Pap with a runaway slave named Jim. Likewise‚ because Huck’s father raised him with such little morals‚ he was able to learn much more about
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In Stanley Milgram’s experiment‚ The Memory Project- effect on punishment on learning‚ the concept of staging in terms of what is real and not real in relation to the photographs objects and subjects‚ which is conveyed through the facilitator and the learner parallels Sontag’s concept of framing and representation In Plato’s Cave‚ and Barthes idea of posing and theater in Camera Lucida. Sontag and Barthes’s understandings of photography’s “reality” intersect in that their notion of the object in
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Double Blind Peer Reviewed International Research Journal Publisher: Global Journals Inc. (USA) Online ISSN: 2249-4626 & Print ISSN: 0975-5896 Chemical and Physicochemical Properties of Moringa Flours and Oil By Abiodun O.A.‚ Adegbite J.A. & Omolola‚ A.O. Osun State Polytechnic‚ Nigeria Abstract - This work evaluates the chemical and physic-chemical properties of moringa seed flour and oil. The moringa seed were divided into two portions. The first portion was milled into flout while the
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Report Submitted: February 17‚ 2013 Title: Physical and Chemical Properties Purpose: To investigate and learn the physical and chemical properties of pure chemical substances. Procedure: I used various different tools to investigate the different physical and chemical properties‚ such as blue and red litmus papers‚ beakers‚ and wells. Data Tables: Substance Name Color Odor Heat Effect Cold H2O Hot H2O Litmus Test Dilute HCl Dilute NaOH Mg Silver None None None Not soluble‚ small bubbles Red
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Chemical Reaction Lab Well #1 CuCl2 + Al (shot) - Bubbling - Turning reddish-maroon - 33oC Well #2 CuCl2 + Al (foil) - Bubbling‚ but less than well #1 - Turning black - 28oC Well #3 CuCl2 + Zn - Turned black then red - No bubbling - 29oC Well #4 CuCl2 + NH4OH - Cloudy - No bubbling - 26oC Well #5 CuCl2 + NaCO3 - Not mixing with CuCl2 - Heterogeneous - 25oC Well #6 CuCl2 + AgNO3 - Cloudy - Top layer is white -29oC 1. The more pronounced reaction was the aluminum
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Classifying Chemical Reactions Introduction Pre-lab questions 1. Which reactants used in this experiment are flammable? Discuss the safety precautions that are necessary when working with flammable materials in the lab? 2. Summarize the following description of a chemical reaction in the form of a balanced chemical equation? 3. Common observations of a chemical reaction are described in the introduction section. For each observation‚ name a common or everyday occurrence that must involve a chemical reaction
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Medical Biology College of Science De La Salle University – Dasmariñas Dasmariñas‚ Cavite Philippines ABSTRACT This experiment was performed to learn the technique of acid-base titration and to compare the efficiency of commercially available antacids by looking at their weight of HCl and weight of antacid values. The analysis of antacid tablets was highlighted in this experiment. The efficiency of antacid tablets was determined and compared when the number of grams of HCl can be neutralized by
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CHIYODA/UOP ACETICA™ PROCESS Aspen Model Documentation Index • Process Summary • About This Process • Process Definition • Process Conditions • Physical Property Models and Data • Chemistry/Kinetics • Key Parameters • Selected Simulation Results: Blocks Streams • References PEP Process Module 1 19 Aug 1999 SRI Consulting Process Summary This Aspen Plus model simulates the production of acetic acid by low pressure methanol carbonylation in the
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