test is a sensitive chemical test for the presence of carbohydrates‚ based on the dehydration of the carbohydrate by sulphuric acid to produce an aldehyde‚ which condenses with two molecules of phenol‚ resulting in a red- or purple-colored compound. Benedict ’s test allows for the detection of the presence of reducing sugars (sugars with a free aldehyde or ketone group). All monosaccharides are reducing sugars since all of them have active carbonyl group. Some disaccharides that are exposed to a
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Cucumis melo Linn. was first described by Linne in 1753. It belong to the family Cucurbitaceae which consists of 825 species in 118 genera (Milind and Kulwant‚ 2011). The birth of Cucumis melo L. has been uncertain. However‚ novel review has testified its origin from East and South Africa. Different cultivated varieties and different forms of fruits have emerged universally in tropical and sub-tropical regions. Cucumis melo L. has a wide geographic distribution. Native countries include South Africa
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Objectives After studying this Unit‚ you will be able to • define the biomolecules like carbohydrates‚ proteins and nucleic acids; • classify carbohydrates‚ proteins‚ nucleic acids and vitamins on the basis of their structures; • explain the difference between DNA and RNA; • appreciate the role of biomolecules in biosystem. Biomolecules “It is the harmonious and synchronous progress of chemical reactions in body which leads to life”. 14 Unit A living system grows‚ sustains and reproduces
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chlorophyll B‚ the only Name of Class fast alkanes alkenes ethers halogenated hydrocarbons aromatic hydrocarbons increasing polarity aldehydes and ketones esters alcohols amines slow carboxylic acids General Formula difference between the two is that on ring 3 chlorophyll a has a RH R2C CR2 methyl group where chlorophyll b R2O RX CH3 has an aldehyde functional ‚ etc group. None of these main pigments absorb green RCH O and R2C O light‚ which is why O RCOR ROH pigments present
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Epoxidation Reactions Lab Report 2 Abstract An oxygen atom is transferred from a peroxy acid to the carbon=carbon double bond thus forming an epoxide. Scheme 1. Oxone Epoxidation. Scheme 2. mCPBA Epoxidation. The percent yield for the Oxone epoxidation reaction was 65% yield and the mCPBA epoxidation reaction was 70% yield. Oxone is the greener alternative because using mCPBA is twice as expensive as Oxone and leaves behind the epoxide plus m-chlorobenzoic acid while Oxone creates non-toxic
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Coco commissioned Russian perfumer Ernest Beaux to create what would become the ultimate Chanel masterpiece and greatest classic perfume of all time—an abstract floral overdosed and overpowered with sparkling yet heavy synthetic chemicals called aldehydes. Chanel No. 5 was ahead of its time as a composition. It was impactful‚ long lasting‚ unique and libertarian in its essence. The juice’s signature hasn’t changed since its creation‚ yet its attributes have evolved to become aspirational in a more
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Amines are essential for the building blocks of life; they are a key component in the formation of amino acids‚ proteins‚ and nucleic acids. Amines contain nitrogen that has one lone pair; this enables it to form 3 covalent bonds with other atoms‚ all while staying neutral. Due to an amines basicity‚ reaction with an acid is very easy and forms a positively charged ammonium ion. As well as being a strong base‚ amines are also quite good nucleophiles. When the nitrogen is directly attached to one
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Macromolecules are molecules that are large and essential for life. They consist of carbohydrates‚ nucleic acids‚ proteins‚ and lipids. Carbohydrates are molecules that are composed of monosaccharaides. Carbohydrates include cellulose‚ starches‚ and sugars. Two tests may be used to determine the presence of the carbohydrates. Those tests are the Benedict’s test and Lugol’s Iodine Test. Proteins are another category of macromolecules. The protein is a type of macromolecule that carry out many processes
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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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Pre-lab 1: Identifying Carbohydrates Abstract The point of this lab is to determine if a substance contains carbohydrates such as a reducing sugar and/or polysaccharides. This will be done by using Benedict’s reagent and Iodine stain tests. Benedict’s reagent will react to reducing substances in the solution by oxidizing it and changing the structure of the reducing sugar to form a colored precipitate. The color of this precipitate can be used to determine the concentration of reducing sugars in
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