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Triglycerides
 

Triglycerides

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A lecture I almost had to give as a 'stand-in' for one of my colleagues. Probably the fastest I've ever prepared a lecture and the first time I have taken someone else's notes and effectively given ...

A lecture I almost had to give as a 'stand-in' for one of my colleagues. Probably the fastest I've ever prepared a lecture and the first time I have taken someone else's notes and effectively given them a 'presentation make-over. Never did give it but it seems pointless having it sitting around on my hard drive.

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    Triglycerides Triglycerides Presentation Transcript

    • triglycerides ur p art 5 nit fo g.j.rowlands u ©anna_t@flickr
    • fats can ©*Micky@flickr taste...
    • ©Mrs Magic@flickr good!
    • provide more energy than carbohydrate or protein ©swisscan@flickr
    • but...
    • is not very good for s u ©Pixar / Disney
    • O O O O O O triglycerides
    • OH OH OH glycerol triglyceride formation
    • OH O OH 3x HO R OH glycerol fatty acid triglyceride formation
    • OH O OH 3x HO R OH glycerol fatty acid O O R O O R O R triglyceride O triglyceride formation
    • natural fats and oils ©Shereen M (away)@flickr
    • fatty acids O HO myristic acid ©JustABigGeek@flickr
    • fatty acids O HO oleic acid
    • fatty acids O HO ©Chris & Lara Pawluk@flickr linolenic acid
    • saturated fat O HO ©Thomas Hawk@flickr
    • unsaturated fat O HO ©darwin bell@flickr
    • O HO polyunsaturated fat ©Marco Veringa@flickr
    • always cis-alkenes O HO
    • trans-fatty are processed acids O HO ©cultr.sun@flickr
    • saturated chains CO2H
    • saturated chains CO2H pack well
    • high melting points ©niznoz@flickr solids
    • kinked unsaturated chains CO2H
    • kinked unsaturated chains CO2H don’t
    • low melting points ©☻mrhappy☻@flickr oils
    • reactions ©euthman@flickr
    • O HO addition Br Br reactions O Br Br HO
    • O HO H H metal catalyst hydrogenation O H H HO
    • O unsaturated HO H H metal catalyst hydrogenation O H H HO saturated
    • of synthesis margarine ©NontrivialMatt@flickr
    • ester hydrolysis O NaOH O R2 HO R2 R1 O R1 O Na saponification
    • ester hydrolysis O O O O O O NaOH H2O OH 3x O OH Na O OH
    • soap O Na O
    • how does soap work?
    • O Na O polar non-polar hydrophilic hydrophobic
    • micelle hydrophobic pocket
    • micelle hydrophilic carboxylate interacts with water ion-dipole interactions
    • grease / dirt hydrophobic
    • non-polar micelle hydrophobic portion inside away from water
    • detergents polar non-polar hydrophilic hydrophobic head tail
    • synthesis of a detergent H2SO4 electrophilic aromatic substitution HO3S NaOH Na O3S
    • stronger acid more ©fdecomite@flickr robust
    • anionic detergent O S O O
    • cationic detergent N Cl
    • cationic detergent N Cl germicidal ©AJC1@flickr
    • fatty acid metabolism
    • 1 hydrolysis O O O O O O your belly OH 3x O OH O OH
    • 2 metabolism O O CoA-SH esterification (coenzyme A) O CoA S dehydrogenation H H O CoA S
    • 2 metabolism O CoA S hydration H2O O OH CoA S H oxidation H H O O CoA S
    • 2 metabolism O O CoA S CoA-SH C–C (coenzyme A) splitting O CoA S O CoA S
    • and repeat ©estherase@flickr
    • energy from breaking bonds C H ©laverrue@flickr
    • O HO more C–H than O HO
    • fat stores 2x energy of ©Great Beyond@flickr sugar
    • thanks to Trevor Kitson