Malaysia is one of the countries with the most abundant types of tropical tree species available in nature. Woods and timber are important in the economic development of Malaysia especially in the import and export industry. One type of woods with such vital function is Leucaena leucocephala. It is a plant species with many branches and numerous clusters of flat pods that enveloped the seeds (Shelton et al.‚ 1994). L. leucocephala was first brought into Southeast Asia in the last few centuries by
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BIOLOGICALLY IMPORTANT MOLECULES Abstract Compounds containing the element carbon‚ called organic compounds‚ are the most important substances that make up living organisms. There are thousands and thousands of different organic compounds. To identify the major types of organic compounds in living organisms ‚ several biochemical test were used . Introduction Organic molecules are those primarily made up of carbon‚ hydrogen and oxygen. The common organic compounds of living organisms are
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mass . CONTROL VARIABLE : Initial mass of mustard green . APPARATUS AND MATERIAL : Mustard green ‚ solution of sucrose with concentration of 0.5% ‚ 1.0% ‚ 1.5% ‚ 2.0% and 2.5% ‚ filter paper ‚ cork borer ‚ knife ‚ beaker ‚ test tube ‚ electronic balance ‚ stopwatch . PROCEDURE : 1) Cut a mustard green and weight it to 5 gram 2) Fill up six beaker labeled A to F with sucrose solutions of concentration 0.5%‚ 1.0%‚1.5% ‚ 2.0% and 2.5% 3) Immerse one mustard green into each of the beaker
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transformation of ketoses to aldoses‚ resulting in all monosaccharides and most disaccharides reducing the blue Cu2+ ion to cuprous oxide (Cu2O)‚ a brick red-orange precipitate. Examples of reducing sugar are glucose. Examples of non-reducing sugar are sucrose. Monosaccharide‚ which is smallest carbohydrates molecules‚ can be described by the number of carbons in the chain so that a monosaccharide with five carbons in a chain is a pentose and one with six carbons is a hexose. A monsaccharide contains one
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Taste Threshold Bottle no.1 has the lowest concentration of the carbohydrates while bottle no.10 has the highest concentration of the carbohydrates. |Groupmate |1 |2 |3 |4 |5 | |Bottle no. of sucrose |4 |4 |3 |3 |2 | |solution | | | | | | |Bottle no. of glucose |7
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Carbohydrates‚ Proteins‚ lipids‚ and nucleic Acid Lab Exercise 6 Date: 9/17/12 Bio 102-11 Purpose the purpose of this experiment was to perform test to detect the presence of carbohydrates‚ proteins‚ lipids‚ and nucleic acids. Explain the importance of a positive and a negative control in biochemical test. Use biochemical test to identify an unknown compound. Background Most organic compounds in living organisms are carbohydrates‚ proteins‚ lipids‚ and nucleic acids they are called macromolecules
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common senses Flavors‚ aromas‚ and chemical signals released from animals can make the mouth water‚ evoke vivid memories‚ and perhaps even signal stress or fertility. How does the brain sort it all out? Salt! &! Sugar" 1 Salt " • Table Salt – Sodium Chloride (may include • Kosher Salt – Large grain salt (sodium • Sea Salt – mixture of salts found in common sea water" chloride)" some additives like Iodine)" Salt substitutes " Salt substitutes are low-sodium table salt alternatives
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Procedure 6.2: Perform the iodine test for starch Tube Solution Benedict’s Color Reaction Iodine Color Reaction 1 10 drops onion juice No change Blue->Black w/white No change 2 10 drops potato juice Precipitation Yellow-> blue 3 10 drops sucrose solution No change No change 5 10 drops distilled water No change No change 6 10 drops reducing sugar solution Blue No change 7 10 drops starch solution No change Yellow-> Blue 8 Unknown
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INTRODUCTION Macromolecules are highly important organized organic molecules that are found within living cells. These biological molecules help the body execute precise important tasks. There are four types of macromolecules: carbohydrates‚ lipids‚ proteins and nucleic acids. (Karp‚ 2010) This specific experiment showcased the identification of different macromolecules using three different testing methods. Carbohydrates‚ sugar molecules‚ are known as “fast fuel” in the body‚ and they contain
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31 1.42 1.43‚ 1.23‚ 1.36 1.34 -5.63 8 1.41‚ 1.17‚ 1.26 1.28 1.08‚ 1.21‚ 0.97 1.09 -14.84 10 1.29‚ 1.17‚ 1.18 1.21 0.94‚ 1.01‚ 0.96 0.97 -19.83 Table to show the 2nd experiment Sucrose Concentration (%) Mass before (g) Average mass before (g) Mass After (g) Average mass after (g) Percentage increase/decrease (%) 0 1.30‚ 1.40‚ 1.20 1.30 1.37‚ 1.37‚ 1.54 1.43 10 2 1.10‚ 1.10‚ 1.10
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