In general you use these values for the preschool child to make it easy for

In general you use these values for the preschool

This preview shows page 34 - 36 out of 70 pages.

In general you use these values for the preschool child to make it easy for health professionals worldwide b/c they don't want to calculate PDCAAS for all age groups; b/c the EAA req’s are different for all age groups. So they just use b/c of ease so it would really exceed all the requirements of all age groups after preschool PDCAAS PDCAAS Casein 1.00 Chicken 0.78 Egg white 1.00 Fruits 0.76; quality is good, but contain a very low amt of protein, so you’d have to eat a lot Soy protein (isolated from all other components in soy seed; w/o inhibitory factors) 1.00 Potato 0.75- Only ~2% protein by weight, so same issue as fruit; Good protein quality but you’d have to eat a lot Whey/ lactalbumin 1.00 Vegetables 0.73 (depends on veggie) Fish 0.9-1.00 (b/c some fish contain anti-nutrients) Legumes- other than soy 0.70 Beef 0.92 Cereals 0.59 Soybean 0.91 Whole wheat 0.42 (b/c of issue with Lys) o If you compare the PDCAAS to other measures of protein quality (BV, PER, NPU), y ou’re going to get a similar ranking no matter what measurement But PDCAAS provides ease of calculation b/c the only biological value you have to determine is the dgtby. Other than that it’s just a bench chemical analyse s. INCREASING PROTEIN QUALITY in PLANTS - Around the world and in developing countries, they rely on mostly plant sources to meet their protein needs. The first paper seen about ways to raise the protein quality of a plant food, in 1997, they the S-AA content of lupins plant and they were able to from 19.1mg S-AAs /g of protein to 22.7 mg/g protein. They transgenically modified it by adding sunflower seed albumin gene o Results: in S-AAs translated to better protein quality and utilization - [PNAS 107:17533, 2010] Another study wanted to protein quality in the potato o Took a gene from amaranth (albumin 1 gene) and put it into seven different WT potatoes and improved Lys and S-AA content o The S-AA content among the 6 varieties the content went up 2.5-4x; significant improvements in protein quality by genetic manipulation
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SFLORES_3/20/2014 35 ASPECTS OF PROTEIN NRG BASAL METABOLISM - Protein needs are related intimately with NRG needs - Different components of protein NRG that we will discuss: o Basal metabolism: b/c protein/N needs are related to BMR 1. Basal metabolism: minimal amount of NRG needed for the body at rest (not sleeping) o Really a measure of heat output of the body b/c heat is a form of NRG or calories 1kcal = heat to raise 1L of water by 1 o C = 1 Calorie (big calorie) If you have a L of ice cold water and you want to get it to the boiling state, you need 100kcal (~ the NRG in a medium sized apple) o Basal metab doesn’ t include NRG needed to carry out daily activities or SDA (~10%) If you just ate calories needed for basal metab you’d eventually go into negative N balance and die But basal metab is a good way to get what the minimum amount is and then we can add what is expended by activity and the SDA - Conditions you need to accurately measure BM: If you violat e any of these conditions, you’re not measuring basal metabolism** 1) Have to be awake and at rest 2)
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  • Spring '14
  • Knutson,MitchellD
  • NRG

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