Other nitrogen containing compounds Catecholamine: Dopamine‚ norepinephrine (noradrenaline) and epinephrine (adrenaline) are biologically active amines and are collectively called as Catecholamine. * Dopamine and norepinephrine functions as neurotransmitters. Outside the nervous system‚ norepinephrine and its methylated derivative‚ epinephrine regulates carbohydrate and lipid metabolism. They are released from storage vehicles in the adrenal medulla in response to stress (fright‚ exercise‚ cold
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Scientific Investigation Paul Devlin The Treatment of Depression Current Methods and Groundbreaking New Treatments Introduction Depression is a very real and serious mental health condition which statistics show will affect 1 in 5 people‚ either directly or through a friend or relative suffering from the condition. Several neuroscience and genetic investigations clearly demonstrate that depression is a disorder of the brain‚ one which modern imaging techniques can reveal. Where in the past
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Abstract The PH at each point during the titration of sodium carbonate unknown sample was determined. An Unknown sample of Na2CO3 was titrated with a standard HCL solution. In addition to titration‚ the pH at each point of titration was measured using PH meter. The % of the unknown Na2CO3 was 25.83% Introduction1 The purpose of this experiment was to determine the actual pH at each point during the titration of a sodium carbonate unknown with the use of pH meter. An acid-base titration is a procedure
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Identify an unknown carbonyl compound © KCl http://hk.geocities.com/fatherofchemistry Objective To classify a carbonyl compound by a simple test and to identify it by the precipitation of a derivative. Principle In this experiment‚ the unknown compound is either an aldehyde or a ketone from Table 90. In the first part‚ on undergoing Tollen’s & Fehling’s tests‚ ketone will have no reaction. In the second part‚ by preparing a derivative of the compound with 2‚4-dinitrophenylhydrazine
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(2004). Nucleophilic Substitution. Retrieved November 13‚ 2012‚ from http://www.chemguide.co.uk/mechanisms/nucsub/whatis.html#top Pavia DL‚ Lampman GM‚ Kriz GS‚ Engel RG. (2011). A Small Scale Approach to Organic Laboratory Techniques. Location: Unknown. Publisher: Mary Finch (August 10‚ 2006). Retrieved November 13‚ 2012‚ from http://www.chem.ucla.edu/~bacher/General/30BL/gc/theory.html Chromatography. Introductory Theory. Retrieved November 13‚ 2012‚ from http://teaching.shu.ac.uk/hwb/chemistry/tutorials/chrom/chrom1
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Being able to identify unknowns is important in chemistry because it allows chemists to identify what chemicals they are working with if they have been improperly labeled or if they are trying to determine substances in a compound. Molecular weight and pKa are two properties that help to identify unknown compounds. To find the pKa of an unknown‚ pH meters are used during titrations to measure the potential difference in a solution by measure the difference of hydrogen-ion activity in a solution and
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that cannot be accounted for‚ or even prepared for. In any experiment there will always be human error. Group Lab Report The purpose of this lab is to use a variety of analytical skills and methods to determine the empirical formula of an unknown compound. There is certain background knowledge needed to understand this lab: What Beer’s Law is and how to generate a Beer’s Law plot‚ how to use elemental analysis‚ and how to form an empirical formula from the percentage of each element in the
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of this lab‚ the objective was to get the molar concentration of sodium hydroxide by using the secondary standard‚ sodium hydroxide solution with the primary standard‚ potassium hydrogen phthalate. With this information‚ we could create a second derivative plot‚ which can be used to obtain the exact concentration of the secondary standard‚ sodium hydroxide. Also‚ the indicator can give us these results along with the end points and with the readings from the pH meter; we can get the equivalence points
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Comparative Biochemistry TITLE: Proteins and Amino Acids RESULTS: Table 1: The results of experiment 1; the Lowry Test Volume of Standard Protein/ Unknown (mL) Absorbance at 750 nm 0 0.000 0.1 0.017 0.3 0.135 0.3 0.155 0.5 0.230 0.7 0.323 0.7 0.310 1.0 0.457 1.0 Unknown 1a 0.463 1.0 Unknown 1b 0.433 1.0 Unknown 2a 0.237 1.0 Unknown 2b 0.159 Table 2: The results of Experiment 2; Ninhydrin Test Amino acid Color X Bright yellow Y Dark yellow Z Light purple
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Hydrogel based controlled release formulations: Designing considerations‚ characterization techniques and applications. Abstract Hydrogels have evolved over the last decade as materials of choice in varied biomedical applications. This is associated with the inherent biocompatible nature of the hydrogels. The modulation of the properties of the hydrogels is easily possible due to the availability of polymers of varied chemistry and physical properties. This review discusses the pharmaceutical
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