Monomer

Abstract. Aim. To show case report on proximal infiltration of early caries lesion. A 22-year-old female was admitted in Department of paediatric and preventive dentistry, School of Dental Medicine, University of Zagreb with finding of early enamel lesion on proximal surface of molar. Radiograph was taken and caries lesion was detected on proximal surfaces of lower left first molar including enamel and outer part of dentin surface. The patient complaints of sensitivity to cold and sweet. ICON…

Prion infectious diseases: History and molecular pathology It is circa 500 BC, and Hippocrates records rare but localised outbreaks of madness within livestock; he observes that the animals’ neurological capabilities rapidly decline after years of apparent normality. When he investigates, he finds that the brains of these animals are ‘very full of dropsy and of an evil odour’. He hypothesises that this disease would be able to spread and infect humans too (McAlister, 2005). To him, this is…

Erwin Schrödinger was a physicist pioneer who gave a series of lectures in 1944. They were published under the title What is Life? (Harold, 2001). Though philosophical in nature, many have wondered if life can be reduced to biology or even further down to chemistry. This sent many scientists looking for the answer and spawned the guiding question, could human life be artificially created at the cellular level? This would consist of arranging the correct amounts of various elements into the…

This essay examines the implications of waste in design and manufacturing with regard to the nature and future sustainability of practices considered modern by contemporary standards. Practices, such as CNC (computer numerically controlled) machining and additive manufacturing such as 3D printing, are the benchmark for modern manufacturing; 'In the domain of manufacturing, computer numerically controlled (CNC) technology is a major contributor to the production capacity of the…

Proteins are a type of macromolecule and have four structures, primary, secondary, tertiary and quaternary. A primary structure of a protein is made up of monomers of amino acids, and is a simple sequence of amino acids joined together by polypeptide bonds. The secondary structure of proteins, is a sequence of amino acids with the polypeptide bonds interacting with one another. The tertiary structure, involves…

An Investigation into the Activity of Alpha-amylase Enzyme in Relation to Temperature and PH Introduction: The role of amylase in plants is the breakdown of starches so that they can be used as energy in the first stages of early growth (wise geek, [B] 2016). Enzymes are extremely efficient natural catalysts that are found in cells, they work by lowering the activation energy of a reaction and providing an alternative reaction pathway. Enzymes are very specific, only catalysing certain reactions…

Metronidazole Systematic (IUPAC) name: 2-(2-methyl-5-nitro-1H-imidazol-1-yl)ethanol Bioavailability : 80% (oral), 60-80% (rectal), 20-25% (vaginal)122,123 Protein binding : 20% 122,123 Metabolism : Hepatic 122,123 Half-life : 8 hours 122,123 Excretion : Urine (77%), faeces (14%) 122,123 Formula : C6H9N3O3 Mol. mass : 171.15 g/mol Melt. point : 159–163 °C (318–325 °F) Metronidazole is a nitroimidazoleantibiotic medication used particularly for anaerobic bacteria and protozoa.…

The viscoelastic behavior of bucky paper reinforced epoxy laminar composite materials for structural application has been evaluated through Dynamic Mechanical Analysis. The effects of heating rate, sinusoidal forces on glass transition temperature Tgwere studied. In DMA LVDT controlled sinusoidal force is applied and measures the response of the input as shown in the figure 3. It measures parameters which are the signature properties of the material under supervision like storage modulus, loss…

Bouncy balls are made up of Polymers, which are made up of many small units of monomers, that go through the process of Polymerization to become Polymers. People can see such polymers all around them like rubber, wool, silk etc. Polymers have unique properties that allow chemist’s and scientists to mix different types of polymers with each other to form new ones. In the lab Polyvinyl Acetate (PVAc), Polyvinyl Alcohol (PVA), and Sodium Borate were used to make and design the bouncy balls. The…

What are the nonpolar parts of a phospholipid? c. Tail group 4. This is the only polar portion of a cholesterol molecule and it forms hydrogen bonds with the polar heads of phospholipids. d. –OH group 5. This type of membrane protein will extend throughout the entire membrane touching both the Intracellular fluid and the Extracellular fluid. e. Integral proteins f. Transmembrane proteins g. Integral proteins and Transmembrane proteins Ans: D…