mixture has bound to the column. The column is then washed with 2 - 5 column volumes of low ionic strength buffer to remove any unbound material which has simply adhered to the column. There are four steps of mechanism‚ firstly is the selective adsorption of the molecules to be separated by the ion exchange resins followed by release of the exchangeable group from the matrix. Next is the elution of the absorbed molecule by specific eluants and regeneration of the matrix by recharging with the original
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EXPERIMENT 8 QUANTITATIVE DETERMINATION IODOMETRIC TITRATION OF COPPER CONCENTRATION IN AQUEOUS SOLUTION B Y RESULTS AND DISCUSSION Considered as moderately weak oxidizing agent‚ Iodine was used for the determination of strong reductants. Standard iodine solutions were found to have smaller electrode potentials as compared with the other oxidants‚ gaining them the advantage of imparting a degree of selectivity essential in the determination of strong reducing agents amid the presence
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Experiment Objectives Determine the % C and % H in an unknown compound. Determine the empirical formula of the unknown compound. Determine the molecular formula of the unknown compound. Carbon-Hydrogen (CH) analysis is performed by burning the unknown sample. As a result of the complete combustion of the compound‚ all of the carbon in the compound is converted to carbon dioxide gas and all of the hydrogen in the compound is converted to water vapor. CxHyA + z O2 (g) → x CO2 (g) +
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3.2 “Lab-on-a-Chip” A Lab-on-a-Chip (LOC) device‚ also known as a micro-total-analytical system (microTAS) or microfluidics device‚ is a device that can integrate miniaturized laboratory functions (such as separation and analysis of components of a mixture) on a single microprocessor chip using extremely small fluid volumes on the order of nanoliters to picoliters. From a technology categorization perspective‚ LOCs can be viewed as a subset of microelectromechanical systems (MEMS) and combine
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CONTENT INTRODUCTION WATER PURIFICATION BY NANOPARTICLES NANOPARTICLES IN WASTE WATER TREATMENT MATERIALS AND METHODS CONCLUSION REFERENCES INTRODUCTION WATER PURIFICATION: It is the process of removing undesirable chemicals‚ biological contaminants‚ suspended solids and gases from contaminated water. NEED: The goal of this process is to produce water fit for a specific purpose
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biomaterials has also been used for coating the surfaces of implants [35]. For instance‚ titanium implants have been coated with poly(D‚L-lactide)‚ in order to control the release rate of embedded TGF-β1 and IGF-1 [36]. Besides physical entrapment‚ adsorption and physisorption are the other mechanisms of protein delivery. For instance‚ the common method for fabricating a BMP delivery vehicle is impregnation of absorbable collagen sponge with BMP solution [37]. Alternatively‚ the bioactive molecule could
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Evaluate the biological treatments of depression. (16 marks) Antidepressants such as monoamine-oxidase inhibitors (MAOIs) and trycyclics (TCAs) are effective in reducing depressive symptoms. Antidepressants have been tested in trials with placebos and have found to be effective in reducing symptoms of severe depression in around 65% to 75% compared with around 33% for placebos – Gitlin 2002. Gitlin carried out a clinical trial testing selective serotonin re-uptake inhibitors (SSRIs) and placebos
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water should be clean enough to wash your hands with. My hypothesis is that the water will be cleaner than the initial water sample‚ but not to the standard that I would wash my hands with. Significant terms to know include purification‚ filtration‚ adsorption‚ volume‚ clarity‚ dissolved‚ filtrate‚ impurities‚ pipette‚ clay triangle‚ funnel cone‚ iron ring‚ beaker‚ and Erlenmeyer flask. Cautions to be aware of is to not pour any sand or gravel into the sink and do not test the water sample by drinking
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COLUMN AND THIN LAYER CHROMATOGRAPHY Maria Janine B. Abarientos‚ Kuia B. Allarde‚ Aliana Keshia P. Andino Mary Viadelle E. Andrada and Nina Marian Robelea G. Ang Group 1 2C Pharmacy Organic Chemistry Laboratory ABSTRACT In this experiment‚ the techniques column and thin layer chromatography was used to separate and determine the purity of the colored components of siling labuyo and malunggay leaves. The results obtained relied on differential solubilities and adsorptivities of the components to
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Abstract A simple‚ precise and accurate solvent extraction method is described for the separation and estimation of Indium in geological materials. Solvent extraction of Indium from 6 M HCl medium using tri-n-butyl phosphate‚ selectively separates Indium from accompanying elements in different type of geological samples. Acid hydrolysis of Nb/Ta samples separates Indium from major matrix elements like Nb and Ta and the remaining elements do not influence the selective extraction and preconcentration
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