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Nanofood: mitos y realidades

Víctor M. Castaño

Centro de Física Aplicada y Tecnología Avanzada

Universidad Nacional Autónoma de México

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Lead sulfide nanocrystals

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• El poder manipular átomos, moléculasa escala nanométrica y arreglarlos dela forma que deseemos puede facilitarla creación de estructuras complejas“al precio de los vegetales”

• Las propiedades ópticas, electrónicas, magnéticas y térmicas de las nanopartículas dependen del tamaño, forma, composición, distancia inter-partícula, y el ambiente que las rodea

Area superficial con relación a la masa• Material: oro

– Cubo de 1 x 1 x 1 cm– V = 1 cm3

– Masa = 19.3 g– area superficial = 6 cm2

• Nanocubos de 10x10x10 nm– No. de cubos = 1 x 1018 cubos– V = 1000 nm3

– area superficial por cubo = 600 nm2

– area superficial total = 6 x 1020 nm2 = – 6 000 000 cm2

• Reactividad química• Temperatura de fusión menor• Parámetro de red menor• No. de átomos superficiales mayor• Mayor superficie de contacto• Solubilidad• Efectos cuánticos• Propiedades ópticas

• Manipulación de la propiedades superficiales:• Diagnóstico• Tratamientro enfermedades• RECUBRIMIENTOS FUNCIONALES• ALIMENTACIÓN

Nanotechnology and poultry

Comfort parameters in poultry

• Humidity

• Temperature• Ventilation

• Feeding

Macro-environment vs. Micro-environmentin poultry production

Poultry Growing Houses

• 40-50’ wide, 400-500’ long

• Modern facilities control air entering the sides of the building

• Exhaust fans blow air over the birds in hot weather

• Overhead fogger lines cool chickens in hot weather

• Space allowance range from 0.7-1.0 square foot per bird depending on season, house type and age marketed

nR1000 Nanotechnology, is a Thermal Insulating, Hydrofugue and

Ignifugue coating with a thermal conductivity of K= 0.059 BTU/HR, which allows a decrease in temperature up to18°C

Bacteria control by using nanotechnology

Bacteria control by using nanotechnology

Bacteria control by using nanotechnology

Growth curve of E. coli in 100 ml NB with 107 CFU/ml in the presence of different concentrations of different silver nanoparticles.

Solubility, diffusion, drug delivery,

biocompatibility, etc.

Bone:

Synergetic combination of Hydroxyapatite

(HAp) and collagen

Ca5(PO4)3(OH)

In the USA,

550,000,000

dozens of eggs

were produced

monthly

as for 2006

SEM of typical eggshell (CaO)

After hydrothermal treatment (HAp)

Poluted water

20 ppm Cr VI

Treated water

Keratin

biofiber

0

2

4

6

8

10

12

1 1.5 2 2.5 3 3.5 4 4.5

time of analysis (min)

Cr V

I R

em

ovin

g %

0 5 15 20

Untreated Keratin biofiber

Nylon membranes with keratin Micro and nano spheres

0

20

40

60

80

100

120

1 2 3 4 5

Time of analysis (min)

Cr V

I R

em

ovin

g %

Keratin biobifer treated with

Sulfuric acid (pH 6)

0 5 15 20 25

0

20

40

60

80

100

120

1 2 3 4 5

Time of analysis (min)

Cr V

I R

em

ovin

g %

Keratin biobifer treated with

Sulfuric acid (pH 3)

0 5 15 20 25

Active sulfur sites to

retain metals

Water with 20 ppm of Cr VI

Water after treatment with

modified keratin biofiber

Rice husk: an

environmental challenge

Annelids: over 12,000

species

Victor M. Castaño

vmcastano@ai.org.mx

meneses@unam.mx

www.victorcastano.net