Results and Discussion – Expt. 3 (Crystallization) Name: Parts A and B: 1. Please comment on the relative purity of your recrystallized salicylic acid (Hint: You should use your empirical data to support your claim). -The Salicylic acid that I obtained had a melting point range around 157-158 degrees Celsius for Part A. For Part B the melting point range was 156-157.5 degree Celsius. Part B‚ I would say the sample is less pure because of the notion that impurities lower the melting point
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Chapter II REVIEW OF RELATED LITERATURE AND STUDIES Review of Related Literature On mosquito larvae‚ the major larval habitats were anthropogenic‚ resulting from human behavior. According to the Journal of Vector Ecology (2012 p37) stated that “The management of insecticide resistance among malaria vectors needs urgent attention if insecticide-treated materials can continue to be used for malaria control.” Metarhizium anisopliae‚ a fungal pathogen of terrestrial arthropods‚ kills the aquatic larvae
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High-performance liquid chromatography (formerly referred to as high-pressure liquid chromatography)‚ HPLC‚ is a chromatographic technique used to separate the components in a mixture‚ to identify each component‚ and to quantify each component. HPLC is considered an instrumental technique of analytical chemistry (as opposed to a gravimetric technique). In general‚ the method involves a liquid sample being passed over a solid adsorbent material packed into a column using a flow of liquid solvent.
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and talked in a public speech to all people. She wants to change the habits of adults and children. Severn says‚ that she found fish with cancer. Is this the way we want to eat fish? We really have to think of what we can make better in waste seperation. So if for instance plastic is thrown in the sea‚ the fish will eat the plastic‚ and we eat the fish. Horrible! Another problem is the buying of unnecessary things. We buy and throw away. Why don´t we think of what we really need? In my opinion
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5.05 Mixtures and solutions Lab report Ink Chromatography Chromatography is also used to compare and describe chemical substances. The chromatographic sequence of sorbed substances is related to their atomic and molecular structures. A change in a chemical substance produced by a chemical or biological reaction often alters the solubility and migration rate. With this knowledge‚ alterations or changes can be detected in the substance. Chromatography serves mainly as a tool for the examination and
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microscopic spaces between the fibres of the chromatographic strip. So‚ this technique is very sensitive laboratory tool since it can differentiate existence pigments in a plant based on the molecular structure of the pigments. From the experiment results‚ the Carotenoid has the lightest molecular weight. Its ratio of front is less than chlorophyll b‚ meaning that it can cause more raise between the microscopic spaces between the fibres of chromatographic strip. There is correlation between molecular
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the land to renew itself will fail and natural disasters will occur Discuss the continuing effect of dispossession on aborigional spiritualities in relation to:-Seperation from the land-Seperation from kinship groups-The stolen generationsThe continuing effect of dispossession on aboriginal spititualities in relation to seperation from the land is one of immense stress to the spirituality. This began with the initial dispossession of european settlement and aborigional spiritualities remain‚ for
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stability-indicating HPLC method was developed for the determination of Donepezil Hydrochloride (DH) in tablet dosage form in presence of its pharmacopoeial related compound (Donepezil related compound A) and its different degradation products. The chromatographic conditions were optimized to achieve the highest performance parameters using Zorbax Eclipse Plus C18 rapid resolution column (4.6 X 100 mm‚ 3.5 µm)‚ with a mobile phase composed of 72.5 % acetate buffer pH 5.5 and 27.5 % ethanol‚ flowing at 1
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There are two phases in chromatography: 1. Stationary Phase – a solid that does not move. In this experiment was the chromatography paper. 2. Moving Phase – a liquid. In this experiment 0.1% of Hydrochloric Acid was used as the solvent. In all chromatographic separations‚ there is an important relationship between the solvent‚ the chromatography paper‚ and the mixture. The main requirement of the solvent is to dissolve the mixture needing to be separated. The porous paper used must absorb the components
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Sngapore’s seperation from Malaysia was caused by UMNO’s policies. The spotlight of this statement is the correspondance of the seperation of Singapore from Malaysia‚ due to the policies carried out by the United Malay National Organisation. During this post-war period‚ although Singapore was already a part of Malaysia‚ their relationship was uncertain due to the political tension and differences in ideology between Singapore and the Malayan states at that time. It has been reviewed that Source
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