OCR gateway Core C1 revision notes Anything written in purple is for higher tier Exam tips are in red Fossil Fuels 3 types Coal (made from dead plants that lived millions of years ago) Crude oil (made from dead sea creatures that lived millions of years ago) Natural gas (made from dead sea creatures that lived millions of years ago) Key words to learn Non-renewable- fossil fuels are said to be this as we are using them up faster than they can be made Finite- these will run out if we
Premium Oxygen Carbon dioxide Carbon
potato plant. Polymers are large molecules consisting of many repeating units‚ called monomers. Polymers can be made out of starch which is composed of long chains of glucose molecules. This study focuses mainly on making biodegradable plastics‚ which is certainly safer than non-biodegradable plastics‚ from potato starch. Biodegradable plastics made from raw materials are completely reusable and can be composted easily. Potato starch contains minimal protein and fat. Potato starch is a Polymer made of
Premium Starch Plastic Sodium hydroxide
--------------(11-14) h. Arrangement of atom in metals i. What are alloys? j. The arrangement of atoms in alloys 4) Synthetic Polymers------------------------------------------------------(15-17) k. What are polymers? l. Monomers in synthetic polymers m. Should we continue using synthetic polymers? 5) Glass and Ceramic--------------------------------------------------------(18-20) n. Glass o. Ceramics 6) Composite Materia
Premium Ammonia Sulfuric acid
RESEARCH REPORT ON ERP SYSTEM OF ENGRO POLYMERS & CHEMICAL LIMITED Prepared for Sameera Sultan Lecturer – Technical & Business Writing National University of Computers & Emerging Sciences By Zunaira Shabbir‚ Yumna Amin & Farah Naz Student – Technical & Business Writing National University of Computers & Emerging Sciences May 15‚ 2013 Contents Executive Summary 2 Introduction 5 Historical Background 6 About Engro 6 Literature Review 8 Key Principles
Premium Enterprise resource planning Oracle Corporation
and found to be precise‚ specific and accurate. The tablets of Verapamil hydrochloride were prepared by press coating technique showing sustained release for 24 h for once daily dosing with a lag phase of 4 - 6 h. The optimum ratios and type of polymers and other excipients were chosen to produce gastroretentive floating tablets to meet the desired objective of lag phase and sustained release. Placebo formulations L1 and L2 differed in the composition of core tablet where L1 contained Kollidon SR
Premium Chemistry Acetic acid Alcohol
produced. While the polymers are accountable for the molecular exceptionally of an organism. The joint monomers are virtually universal. The difference in the form of the macromolecules are responsible for the molecular diversity. The variation that occurs both within an organism and among plants can be traced to the difference in macromolecules. Also‚ the various molecules vary from cell to cell in an identical body‚ in addition to a single species to the next. The linked together polymers are disintegrated
Premium Amino acid Protein Oxygen
coatings. If we continue to use petroleum to make polymers for plastic etc‚ we will eventually run out therefore Biopol has been introduced as a replacement polymer for petroleum. Biopol is made from a biological substance which is a microorganism known as Alcaligenes eutrophus. Properties; Biopol is stable when stored in air and even in humid conditions. The decomposition into carbon dioxide and water will only occur when they expose the polymer to microorganisms found in soil‚ sewage‚ river bottoms
Premium
The device sandwiches a blob of a conducting polymer called PEDOT and a silicon diode between perpendicular wires. The key to the new technology was discovered by passing high current through PEDOT (Polyethylenedioxythiophene) which turns it into an insulator‚ rather like blowing a fuse .The polymer has two possible states- conductor and insulator‚ that form the one and zero‚ necessary to store digital data. However tuning the polymer into an insulator involves a permanent chemical
Premium Flash memory Computer data storage
compounds composed of three separate agents that act together to form a rigid polymer. The three agents that act together to form the polymer include‚ an organic resin matrix‚ inorganic filler‚ and a coupling agent. The most important agent‚ the organic resin matrix‚ is typically composed of a compound referred as bis-GMA‚ or bisphenol A glycidyl methacrylate. This aromatic methacrylate is considered to be a rigid polymer because of the benzene rings near its center‚ and also provide specific sites
Premium Functional group Oxygen Molecule
known as polycarbamates‚ belong to a larger class of compounds called polymers. Polymers are macromolecules made up of smaller‚ repeating units known as monomers. Generally‚ they consist of a primary long-chain backbone molecule with attached side groups. The preparation of polyurethanes is a process of polymerisation whereby a diisocyanate and a dihydroxyl compound react together. Polyurethanes by definition are linear polymers that have a molecular backbone containing carbamate groups (-NHCO2)
Premium Polyurethane Functional group