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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
www.victorcastano.net
