physical properties of monosaccharides and polysaccharides are different and can be detected with specific chemical tests. Glucose is an example of a monosaccharide that can be linked together in long chains to make a polysaccharide called starch. Even though starch is made up of glucose‚ in chemical tests the two
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Abstract This experiment was carried out to perform staining methods on microbes‚ explain the mechanisms of staining‚ namely‚ simple staining‚ and learn how to use the microscope. The experiment setting was kept as sterile as possible when conducting the experiment. The microbes under the microscope were drawn out and labelled. In conclusion‚ different staining techniques are used to determine the presence of certain exterior structures of the bacteria like the cell envelope or just to identify
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Topic 8a – Carbonyl compounds Revision Notes 1. Introduction • Aldehydes and ketones are carbonyl compounds • They contain the carbonyl group C=O • The functional group in aldehydes is –CHO on the end of a chain e.g. ethanal CH3CHO • The functional group in ketones is C=O not at the end of a chain e.g. propanone CH3COCH3 2. AS Recap • Primary alcohols are oxidised by acidified potassium dichromate. An aldehyde is produced first and this can be further oxidised
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Analysis of Commercial Bleach AP Chemistry Introduction: Many commercial products are effective because they contain oxidizing agents. Some products that contain oxidizing agents are bleaches‚ hair coloring agents‚ scouring powders‚ and toilet bowl cleaners. The most common oxidizing agent in bleaches is sodium hypochlorite‚ NaClO (sometimes written NaOCl). Commercial bleaches are created by bubbling chlorine gas into a sodium hydroxide solution (remember this from your “funky redox rxns”?)
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Lecturer’s name: Mr. Paul Davidson Discussion The name of enzyme involved in this experiment is salivary amylase‚ which presents in our saliva. Salivary amylase catalyses the breakdown of complex sugar‚ such as starch‚ into a simple sugar‚ such as glucose. In this experiment‚ the optimum temperature for salivary amylase to function is 37˚C. Above the optimum temperature‚ the kinetic energy in the substrate and enzyme increases. The number of collisions between
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Déportes 2‚ B-5030 Gembloux‚ Belgium *Corresponding Author E-mail address: ascientific@aec.org.sy 2Centre The objective of the study was to isolate amylase producing bacteria from Syrian soil samples. Amylolytic Bacillus sp were isolated on starch agar medium. The Bacillus SY134D was the best amylase producing isolate among two hundred and ten isolates showed the amylolytic activity. The closest phylogenetic neighbours according to 16S gene sequence‚ the Bacillus SY134D isolate was identified
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EXERCISE 39 B NAME ____________________________________ LAB TIME/DATE ________________________ Chemical and Physical Processes of Digestion: Computer Simulation Carbohydrate Digestion The following questions refer to Activity 1: Assessing Starch Digestion by Salivary Amylase. 1. At what pH did you see the highest activity of salivary amylase? 7.0 Why? because that is when the salivary is most effective and it breaks down carbohydrates 2. How do you know that the amylase did not
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REPORT EXPERIMENT 9 CARBOXYLIC ACID AND DERIVATIVES Date: January 19‚ 2004 Objectives: 1. To understand the reactions of carboxylic compounds and derivatives. 2. To know the methods for preparing carboxylic acid derivatives. 3. To know the methods for testing the carboxylic acid derivatives. Experimental Procedures: 9.1 Solubility 1. Prepare 3 test tubes with 3 ml of water in each. 2. Place 3 drops of acetic acid‚ benzoic acid‚ and oxalic acid in separate test tubes. 3. Shake and observe
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BIOLOGY 114 MOLECULAR AND CELL BIOLOGY PRACTICAL MANUAL DEPARTMENT OF MICROBIAL‚ BIOCHEMICAL AND FOOD BIOTECHNOLOGY FACULTY OF NATURAL AND AGRICULTURAL SCIENCES UNIVERSITY OF THE FREE STATE 2012 Lecturers Prof. E. van Heerden Room 8 Department of Microbial‚ Biochemical and Food Biotechnology Prof. J. Albertyn Room 51 Department of Microbial‚ Biochemical and Food Biotechnology Practical time table Week Week begin Tutorial Tutoriaal Prac. and lecturer Prak
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Ammonia cal silver nitrates). CH3–CHO+ [O] CH3COOH 3. From alkyl nitriles: Compounds having a cyanide ( –CN) group are called nitriles. Hydrolysis of an alkyl nitrile on boiling with mineral acid or alkalis yield corresponding carboxylic acid . R–CN +H2O RCOOH +NH3 CH3–CN + 2H2O+HCL CH3COOH + NH4CL 4. BY OXIDATIVE CLEAVAGE OF ALKENES: Alkenes when heated with alkaline KMNO4 are cleaved at double bond to form carboxylic
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