process‚ the mobile phase passes over the compound spots at the bottom and drags them up the adsorbant. The resulting spots where the compounds stop can be used to measure their polarity and solubility in the mobile phase. We had a reference spot‚ unknown spot‚ and compound spot where we mixed both. Salting: In an extraction‚ if the compound is partially soluble in water then the process of salting out can help further separate it into the organic layer by increasing the polarity of the aqueous solution
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Amphetamines What is the amphetamines? Amphetamines- A racemic sympathomimetic amine that acts as a central nervous system stimulate. It (and it’s derivatives‚ such as methamphetamine and dextroamphetamine) is a commonly abused substance‚ but has therapeutic use in the treatment of narcolepsy and attention-deficit/hyperactivity disorder. How is the amphetamines used? Therapeutic Uses: ADD/ADHD Narcolepsy Asthma or other lung disorders( stimulates bronchiole response) Weight Loss Non-therapeutic
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have neurotransmitter-like properties‚ and many additional true neurotransmitters may await discovery. The first of these families‚ and the group about which most is known‚ is the amine neurotransmitters‚ a group of compounds containing a nitrogen molecule which is not part of a ring structure. Among the amine neurotransmitters are acetylcholine‚ norepinephrine‚ dopamine‚ and serotonin. Acetylcholine is possibly the most widely used neurotransmitter in the body‚ and all axons that leave the
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CHM1002 Synthesis of Benzanilide and Methyl 3-Nitrobenzoate and the Identification of ‘Unknowns’ from Spectroscopic and Physical Properties James Lucas 10394308 23/11/12 Introduction In this series of practicals it was the aim to synthesise both Benzanilide and Methyl 3-Nitrobenzoate. Benzanilide was synthesised using The Schotten Baumann reaction which takes a hydrogen atom from an amino group and substitutes it for an acyl group. For Methyl 3-Nitrobenzoate
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consequences of the use of this drug in both clinical and recreational setting but American Pharmaceutical companies continue to manufacture 88% of the world’s legal stimulants. This paper will examine the history of use of amphetamine and some important derivatives throughout our society and then look at drugs such as Vyvanse‚ which is one attempt to diminish the abuse liability and possibly enhance therapeutic quality. History and Cultural Significance During the late nineteenth century‚ the Romanian
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1 HIGHER SECONDARY MODEL EXAMINATION HSE II Max.marks: 60 CHEMISTRY Time: 2.45 hrs General instructions All questions are compulsory Cool-off time is 15 minutes 1] Defects modify the properties of crystals [4 marks] A] Give differences between Schottky and Frenkel defects [2.0] B] On heating zinc oxide becomes yellow in colour. Why? [1.0 ] C] Alkali metal halides on heating in presence of alkali metal produce characteristic colours.Give reason [1.0] 2] Colligative
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2.4.General procedure for the synthesis of 2‚3-dihydriquinazolin-4(1H) ones derivatives: A stirred mixture of isatoic anhydride (1 mmol)‚ amines containing 2-aminobenzothiazole or 2-amino benzimidazole (1.1mmol)‚ aromatic aldehydes (1 mmol) and 0.045 g of H-ZSM-5 nanozeolite was reacted in an oil bath at 100 oC for the appropriated times. Completion of the reaction was indicated by TLC. After completion of reaction‚ the mixture was cooled to room temperature. The solid residue was dissolved in hot
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A methamphetamine is an amine derivative of amphetamine used in the form of its crystalline hydrochloride as a central nervous system stimulant‚ both medically and illicitly. Long- term methamphetamine abuse may result in many undesired effects including addiction. Meth addicts constantly crave the singular sensation of highness that comes from introducing the drug into their system. Eventually this can lead to anxiety‚ insomnia‚ and poor dental hygiene‚ loss of self –esteem and feelings
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sensitive method has been developed for the determination of glucosamine sulphate from tablets by UV-spectrophotometery. In this method‚ glucosamine sulphate was reacted with phenylisothiocyanate in presence of a base to yield phenylthiourea derivative. This derivative showed maximum absorbance at 240 nm. Beer’s law is obeyed in the concentration range of 5-25 µg/ml. The method was validated in terms of linearity‚ precision (relative standard deviation 1.1%)‚ accuracy and specificity. The proposed method
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Amphetamine or Amfetamine‚ also known as alpha-methyl-phenethylamine‚ phenyl-isopropylamine‚ beta-phenyl-isopropylamine‚ and benzedrine‚ is a prescription stimulant commonly used to treat Attention-deficit hyperactivity disorder (ADHD) in adults and children. It is also used to treat symptoms of traumatic brain injury and the daytime drowsiness symptoms of narcolepsy and chronic fatigue syndrome. Initially it was more popularly used to diminish the appetite and to control weight. Brand names of the
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