molecule and formed hydrogen bonds with the silica gel (structure of O=S=O). In order to acquire the fluorenone crystals‚ ethyl acetate was introduced second because it is a polar solvent. Hydrogen bonds were formed between the ethyl acetate and the fluorenone molecules‚ so the fluorenone molecules were displaced from the silica gel adsorbent. Because ethyl acetate is held to the silica gel by hydrogen bonds between the oxygen atoms of the silica gel and the hydrogen atoms of the ethyl acetate
Premium Oxygen Chemistry Distillation
hydroxyacetopheone‚ taking advantage of capillary force to make small spotting. A 30:70 ether acetate: petroleum ether is used as a solvent‚ which will not interact with surface of the silica gel due to a characteristic of non-polar. When they are desorbed‚ that is‚ when there is no interaction between the surface of the silica gel and the molecules of interest‚ in that situation molecules are moving with the solvents through the system because solvents is always moving passed the
Premium Chromatography Analytical chemistry Thin layer chromatography
adsorption of hydrocarbons is done by using a complex nanomaterial. i.e.‚ Carbon Monolithic Aero gels. Using cuprous salt for absorption of carbon monoxide is no more an innovative idea. But in today’s world of Nano Technology usage of Aero gels (Nanomaterial) to adsorb Hydrocarbons needs a major concern. So in this paper we highlight the production‚ usage and regeneration of Carbon Monolithic Aero gels. Keyword -. BTX -Benzene‚ Toluene and Xylene compounds. INTRODUCTION |Pollutant
Free Carbon dioxide Oxygen
primer attached to a DNA strand. DNA Gel Electrophoresis Click on the following link and perform the gel electrophoresis experiment: http://learn.genetics.utah.edu/content/labs/gel/ 1. What is the function of gel electrophoresis? Way to sort and measure DNA strands according to length. This technique is also useful for separating other types of molecules‚ like proteins. 2. Where are DNA samples placed in the
Premium DNA
Tetraphenylporphyrin Abstract: In this green chemistry experiment of 5‚10‚15‚20-tetraphenylporphyrin was synthesized from benzaldehyde and pyrrole. using microwave irradiation to heat the reactants.‚ The liquid reactants are absorbed on a solid support‚ silica gel‚ which acts as a Lewis acid catalyst to facilitate the reaction. The reaction forms a porphyrinogen‚ which is then oxidized to the porphyrin product by atmospheric oxygen. Column chromatography is performed for the isolation and purification of
Premium Solvent Thin layer chromatography Chemical reaction
Abstract In order to experiment with distinct components of a mixture‚ they must be first separated so they can be observed individually. This is accomplished in this lab by the technique called thin layer chromatography (TLC). TLC involves a stationary phase‚ which the TLC plates as well as a mobile phase‚ which could be one of two solvents used: ethanol-acetone for TLC. Dyes in a sample separate consequently because of their unique polarities. As a result‚ nonpolar substances travel further
Premium Thin layer chromatography Chromatography
technique‚ a solid stationary phase called the adsorbent is packed in a glass column and an eluent‚ which is the mobile phase‚ moves slowly through the packed column. In this experiment‚ an adsorption chromatography column was constructed using silica gel as the adsorbent. A 50:50 mixture of ferrocene and acetylferrocene was then separated using the eluents hexane and tert-butyl methyl ether (TBME). The less polar ferrocene was attracted to the less polar hexane‚ so as the hexane passed through the
Premium Chromatography
returning a proton to the catalyst‚ or it may undergo a further reaction and form a completely new molecule. Up until the mid - 1960’s silica-alumina gels were used to catalyse the cracking of hydrocarbons. This form of cracking is where the large molecules in oil are converted into small‚ highly volatile molecules. However because the size of the pores of silica-alumina gels was so
Premium Hydrogen Chemical reaction Catalysis
the break allows DNA to rotate around the phosphodiester backbone which causes supercoils to be released. Supercoiled plasmid is more compact and sustains less resistance compared to open circular plasmid and therefore travels quicker in an agarose gel. Linear conformation is produced when a smaller fraction of the DNA sustains double-stranded breaks and it has less resistance than open-circular DNA‚ but more resistance than supercoiled DNA (Varsani
Premium DNA Molecular biology
caused by the CFCs or HCFCs. Increasing recognition of environmental problems associated with CFCs and HCFCs has opened favourable opportunities for the development of green air conditioning technologies. This project report presents a revolutionary silica gel – water adsorption system for air conditioning in automobiles. The cooling effect is achieved by recovering waste thermal energy from the exhaust gases. The system is cheap and easy to fabricate. The refrigerant‚ being water‚ is environment friendly
Premium Adsorption HVAC Activated carbon