ABSTRACT ------------------------------------------------- Food contains nutrients that are very significant to the body. The basic essential nutrients‚ vitamins‚ and minerals play very significant functions in the different metabolic processes. In order for the nutrients to be known‚ several tests were performed to qualitatively analyze nutrients for the different food samples. Reagents were used as indicators to test common food substances for the presence of specific nutrients. Fruit juice
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The Lewis dot structure doesn’t follow the octet rule‚ have the correct number of electrons‚ or any bonds. 74) Ethyl alcohol and dimethyl ether each have to same molecular formula‚ C2H6O. Ethyl alcohol has a much higher boiling point (78°C) than dimethyl ether (-25°C). Propose an explanation for this difference. Ether molecules cannot form hydrogen bonds with each other and therefor result in a much lower boiling point than alcohols. 76) Is this statement true or false? “As
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reacts with free amino ‚ imidazole and phenolic groups forming DNP derivatives. DNP derivatives then have been hydrolyzed to cleave the dipeptide followed by ether extraction. First extraction of ether was used to remove excess ethanol and excess FDNB and leaves an aqueous suspension of the DNP- dipeptide. While in second extraction of ether‚ the ether phase was the one recovered because it contains the DNP- amino acid and this is governed by the principle “like dissolves like”. DNP- amino acid was run
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Cl- is extracted using Pasteur pipet. Dry the product with CaSO4 thoroughly. This step is important because if there’s any water residue left‚ it will show when drying ether at rotary evaporator step. Also‚ water is incompatible to GC. After vacuum filtration‚ we can add ether and use rotarary evaporator to dry out the ether and then if the product is clean‚ it is ready of GC and further procedures. qDiscussion of Results Under normal conditions (low temperature/low acid concentration)
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Cross-Cultural Perspectives ETH/316 3/1/2013 Michelle Clark-Washington Cross-Cultural Perspectives I did my research on McDonald’s a global organization that has had a few cultural issues that affects them when growing outside the United States. So as we all know McDonald’s is a fast food company‚ they started in the United States in 1940 as a barbecue restaurant. In 1948 they took a look at the restaurant and choice to change what they made and sold. They moved to a production line
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131). Reaction Mechanism: Procedure: This experiment was preformed according to the methods described in the laboratory manual (Lehman‚ 134-135). To carry out the Diels-Alder reaction 1.00g of eucalyptus oil was dissolved with a 2.00ml ethyl ether. Assuming that 50% of the mass of the eucalyptus oil was the unknown diene‚ the mass of maleic anhydride needed to react with .50g of diene was calculated and added to the reaction mixture. The reaction mixture was than heated under gentle reflux
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Conversion of sugars into alditol acetates and trimethylsilyl (TMS) ethers have been the most widely used methods for GC analysis of sugars. "Alditol acetate" method involves reduction of sugars with sodium borohydride following conversion of polyols to polyacetate esters. TMS ethers of sugars can be prepared from a number of commercially available silylation reagents. Both derivatization methods have disadvantages. Preparation of TMS ethers may result in as many as four derivatives for each sugar that
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sulphoxide and sulpohone as toxic phorate metabolites (Venkatramesh et al.‚ 1987). Similarly‚ with other microbial species‚ identified phorate metabolites included phosphodithioate sulphoxide‚ phosphodithioate sulphone‚ diethyl dithiophosphate‚ triethyl dithio-phosphate‚ diethyl disulfide‚ formaldehyde and hydrogen sulfide (Hong et al.‚ 2000; Hong and Pehkonen‚ 1998; Kadam and Gangawane 2005; Singh et al.‚ 2003; Szeto et al.‚ 1990). Thus‚ the degradation products differ with different microbial species
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Introduction An essential oil is a concentrated hydrophobic liquid containing volatile aroma compounds from plants. Essential oils are also known as volatile oils‚ ethereal oils or aetherolea‚ or simply as the "oil of" the plant from which they were extracted‚ such as oil of clove. Volatile oils are the odorous and volatile products of various plant and animal species. As they have a tendency to undergo evaporation on being exposed to the air even at an ambient temperature‚ they are invariably termed
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CHEM 2325 Organic Chemistry II Handout #1A – Alcohols 1) What type of orbital do the lone pair electrons on oxygen occupy in ethanol? A) σ B) π C) p D) sp E) sp3 2) Provide the structure of the major organic product in the reaction below. 3) Provide the structure of the major organic product in the reaction below. 4) Provide the structure of the major organic product in the reaction below. 5) Provide the structure of the major organic product in the reaction
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