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Lipdios e Membranas

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Frmula geral de triglicerdeos Gorduras

E outros derivados

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Glicerol + H3PO4

X= acar

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~50 nm!!!

Fluidez, Fora para no romper,PermeabildadeFuso

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Como deve ser a permeabilidade da membrana no Tm?

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Ponto de fuso em geral funo linear com P.M.

Para bicamadas processo cooperativo ponto de fuso noAquecimento diferente da fuso!

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Bactrias-controle da fluidez da bicamadaInsere c.graxo insaturadoTm

Transio de Fase de c. Graxos,

Saturado alto! Insaturado Baixo!

Mamferos insere colesterolTm alarga....

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leo de San Lorenzo

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Gordura Trans encontrada em vriosalimentos: Batata frita, Pipoca demicroondas, Margarinas.leos Vegetais parcialmentehidrolisados..

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Trans Fat: Experts could not provide a reference value for trans fat nor any other information thatFDA believes is sufficient to establish a Daily Value or %DV. Scientific reports link trans fat (andsaturated fat) with raising blood LDL ("bad") cholesterol levels, both of which increase your riskof coronary heart disease, a leading cause of death in the US.

Important: Health experts recommend that you keep your intake of saturated fat, trans fatand cholesterol as low as possible as part of a nutritionally balanced diet."

The Harvard School of Public Health is more direct in its warning against intake of trans fats:"Trans fats are even worse for cholesterol levels than saturated fats because they raise bad LDLand lower good HDL. While you should limit your intake of saturated fats, it is important toeliminate trans fats from partially hydrogenated oils from your diet." Source Harvard SPH

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When it was discovered that eating saturated fats increases the risk for coronary heart disease, thefood industry turned to partial hydrogenation. This process lowerd the content of saturated fat invegetable shortening and margarine, but also dramatically increased the amount of a certain kindof fat - trans fat - in our diets. While suppliers praised processed vegetable oils as healthyunsaturated and cholesterol-free substitutes for animal fats, there is now strong evidence thatintroducing trans-fatty acids into our diets does more harm than good.

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Omega 3

Docosahexaenoic Acid (DHA)

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Os cidos graxos mega 3, como o cido alfa-linolnico, cido eicosapentaenico e ocido docosahexanico, so cidos carboxlicos poliinsaturados sem os quais nossorganismo no funciona adequadamente. Por essa razo, este cido graxo chamado

de essencial e deve ser includo na dieta alimentar, assim como o mega 6.A ingesto do mega 3 auxilia a diminuir os nveis de triglicerdeos e colesterol total,nquanto que o excesso dele pode retardar a coagulao sangnea. um important

mediadorde alergias e processo inflamatrios, pois so necessrios para a formao das

, .

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Omega-3 so cidos graxos poli-insaturados derivados da comida

Omega-3s (e omega-6s) so denominados essenciais

Peixes de gua fria como atum, salmo certas plantas de escuro

Benficos ao corao inclui efeitos anti-inflamatrios e anticoagualanteDiminui nveis de Colesterol e triglicerdeos

Pesquisas ainda incipientes, maioria de estatstica mdica e cobaias

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HDL-LDL etc

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Good and Bad Cholesterol

Are you aware that good and bad cholesterol exist? Goodcholesterol is actually a kind of lipoprotein (combinationof proteins and lipids) called HDL. It carries cholesterol to

,

sent out of the body. LVDL and LDL are the "baddies" andthey are also lipoproteins. They carry cholesterol throughthe bloodstream to the body cells. But in excess, theymay form fatty deposits in the artery walls and block theblood flow.

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Cardiolipina

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