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1
Role of advanced and nutrient sensitive
technologies in nutritional security
Prof. Dr. Masood Sadiq Butt
National Institute of Food Science &
Technology, Faculty of Food, Nutrition
& Home Sciences, UAF.
3
Circuiting points
Food and nutritional
insecurity in Pakistan
Nutritional and
health challenges
Advanced and nutrient
sensitive technologies
for nutritional security
• Globally, micronutrient malnutrition
has affected over 2 billion people i.e.
more extensive than protein-energy
deficiency, prevailing > 900 million
people
• In Pakistan, 58% households are
facing food insecurity
▫ Food insecurity in rural areas
reported up to 60.6% in contrast to
52% among urban population
NNS (2011)
Food and nutritional insecurity in Pakistan
Provinces
Food
insecurity
Punjab 59.5%
KPK 28.2 %
Sindh 72%
Baluchistan 63.5%
FATA 58.4%
AJK
57.1 %
4
Nutrition security
▫ Nutritionally adequate or balanced
diet
▫ Safety of nonessential nutrients i.e.
phytonutrients
▫ Availability of micronutrients
▫ Ensure protein digestibility
▫ Safe foods from microbiological
aspect
▫ High quality food
▫ Accessibility of eco-friendly
processing procedure
▫ Educational motivation for healthy
food choices
▫ Poverty and unemployment
▫ 6th most populous country over the globe
▫ Time constraints faced by working women in food preparation & child
care
▫ Difficulty in losing excess body fat due to closely spaced pregnancies
▫ Suboptimal breastfeeding
▫ Mono-cropping with cereals; adverse impact on soil nutrition
▫ Inadequate supply of safe water & sanitation facilities
▫ Street foods prepared under unhygienic conditions
▫ Lack of information & education to make prudent food choices
▫ High reliance on monotonous staples
Nutritional and health challenges faced
by Pakistan
6
Food and nutritional insecurity in
Pakistan
• Prevalent deficiencies include iron, zinc, folate, vitamin A & D
deficiencies
• Vulnerable segments; pregnant & lactating women and young
children
• Deficiencies occur due to limited access to natural
micronutrient-rich foods or fortified foods; either too expensive
or locally unavailable
• Micronutrient malnutrition is amongst 10th leading causes of
infectious illnesses and mortality
7
• Old paradigm
▫ Green revolution; increased food production or food security
 No focus on nutritional value and human health
 Displaced traditional crops dominant in limiting
micronutrients
• New paradigm
▫ Ultimate objective; linking agriculture to achieve nutritional
security and improving human health
Paradigm shift
8
• Consumers are aware of links between diet and health hence looking for
food options with multiple benefits; good taste and disease prevention
• Popular dietary interventions include single & multiple food fortification
and designer & excipient foods but proper distribution channel is needed
• Synergism between nutrients and phytochemicals confer optimal health
benefits thereby retention should be maintained at highest possible levels
from farm to fork
• Thermal processing contribute irreversible losses of nutritional quality
thus non-thermal technologies are necessitated
Dietary interventions and challenges
9
Advanced and nutrient sensitive
technologies
1. High pressure processing
2. Pulsed electric field
3. Hurdle technology
4. Supercritical fluid extraction system
5. Encapsulation
6. Ohmic heating
7. Ultrasonic heating
8. Microwave vacuum heating
9. Irradiation
High Pressure Processing (HPP)
• Maintain sensorial and nutritional value
▫ Limited effects on covalent bonds
• Applicable for liquid and packed solid foods
• HPP properties;
▫ Hydrostatic pressure same in all directions
▫ Transmitted uniformly and immediately via pressure transferring
medium (water)
▫ Independent of product size and geometry
• Determinants of HPP effectiveness
▫ Extrinsic factors; temperature, time, pressurization or decompression
rate and number of pulses
▫ Intrinsic factors; food composition and physiological states of
microorganisms
HPP working
Cont…
• Universally applicable to all food types, some dairy and
animal products and shelf-stable low-acid foods
• Extend shelf life of meat by controlling the growth of both
spoilage and pathogenic bacteria
▫ Salmonella spp.
▫ Listeria monocytogenes
• Enable consumer to access foods with distinct advantages
over thermally processed foods;
▫ Such as minimally processed, fresh-tasting, high quality
convenient products with extended shelf life
Pulse Electric Field (PEF) processing
• Require very short electric pulses (μs) at high electric field strengths
(kV/cm)
• Inherent ability to uniformly and simultaneously treat entire food
• Good prospects for being used in the fruit juice industry
▫ Stabilize fruit juices, maintaining nutritional and sensorial
properties
 PEF-treated orange juice (35 kV/cm, 1000 μs) retain more vitamin C i.e.
91.2% than heat-treated orange juice 82.8% (94.6 °C, 1min)
• Electric field strength, treatment time, pulse frequency, pulse width
and polarity significantly affect antioxidant capacity
Working of PEF
Effect of PEF against microorganisms
• Mechanical breakdown of
microbial membranes via electrical
effects, not by electrically induced
thermal effects
• Electrical fields (16 kV/cm) reduce
vegetative population of bacteria
• Less effective in destroying spores
and enzymes
Hurdle technology
• Combination of several preserving elements (called hurdles)
give answer of consumer perspectives;
▫ Demand for healthier foods, retaining their original
nutritional value
▫ Shift towards convenience foods, requiring little further
processing
▫ Consumer preference for safe food, free from preservatives
• e.g. combination of HPP with antimicrobials or moderate
thermal treatment
Hurdle technology; HPP+Temperature
• HPP (300-1000 MPa) and temperature (> 70 ᵒC); ‘‘High Pressure
Sterilization (HPS)’’
▫ Reduce microbial spores
▫ Minimize undesirable enzymatic reactions
▫ Compromises nutritional value depending on food matrix and
severity of conditions
 Pressure and temperature (600-850 MPa, 75-80 ᵒC for 40
min); degrade ascorbic acid by 50-70% in fruit juices
Hurdle technology; HPP+Antimicrobials
• HPP and antimicrobial agents; bacteriocins,
lactoperoxidase and nisin; work synergistically to increase
bactericidal effects
• Microorganisms tries to maintain constant physiology
when stress factor disturbs their environment
• Different hurdles act simultaneously against several targets,
causing metabolic exhaustion of cell
• High pressure damages membranes causing cell
permeability allowing easy entry of antimicrobials into the
cells under pressure i.e. “pressure-promoted uptake”
GREEN
approach;
Supercritical-
CO2 (SC-CO2)
Extraction
22
GREEN extraction
principles
• Principles to establish green label;
▫ Use CO2 as solvent alternative to organic solvents
▫ Ensure safe, clean and high quality extract
▫ Improve and optimize existing processes
▫ Favor safe, robust and controlled processes
▫ Rapid extraction
▫ Higher extraction yield than conventional method
▫ Low extraction temperature for heat labile compounds
▫ Concentrated analytes
▫ Reduce energy consumption
extraction principle
• Two step recovery of phytochemicals;
1.Solubilization and extraction of bioactive molecules
from plant matrix into SC-CO2
2.Separation of extracted moieties from SC-CO2 by
decreasing pressure or solvation power
24
Extraction from leaf
gland
25
Sample
Restrictor
CO2
Extract in collector
Extraction cell
SC-CO2
cylinder
Pump
CO2
CH3OH
Benefits; Novel Technique
• Novelty in nutraceuticals extraction from plants;
▫ Short extraction time and high recovery
▫ Efficient penetration of solvent into plant matrix
▫ Low temperature, avoiding oxidative reactions
▫ Better extract quality
▫ Free from organic solvent residues
▫ Reduction in storage and disposal cost
26
Encapsulation in food
system
Encapsulation
• Delivery vehicle for functional ingredient to food system
• Packaging technique to trap active ingredients within coating material
• Delivery system specifically designed;
▫ To shield active ingredient from surrounding environment
• Deliver active ingredients;
▫ At appropriate time
▫ To targeted point within the human body
▫ By using particular release mechanism
Release mechanisms
• Depends on nature of application;
1. Mechanical rupture of capsule wall via pressure
2. Wall dissolution via solubility or chemical reaction
3. Thermal release or melting of wall by diffusion
4. Slow erosion of shell
5. Biodegradation
Microencapsulation benefits
▫ Trap minerals, vitamins, flavors, essential oils and polyphenols
▫ Protect functionality & structural integrity of fragile phytoceuticals
▫ Separation from incompatible components
▫ Stabilize shelf life of active ingredients
▫ Mask undesirable taste, odor, color and texture
▫ Enhance visual aspect and marketing concept
▫ Improve processing, handling and safety of active agent
▫ Controlled and targeted release in physiological system
• Political dimension; policy-makers must ensure safe, nutritious and
wholesome foods for healthy living
• Economic dimension; increasing employment opportunities to ensure
availability, access and uniform food distribution among masses
• Technological dimension; use of nutrient sensitive techniques for the
development of value added products, ensuring nutritional security
• Social dimension; creating awareness among general public regarding
diet-health linkages and eco-friendly processing procedures at
commercial and household levels
• Cultural dimension; utilizing diversified indigenous crops for the
development of convenience foods to combat prevailing nutritional
deficiencies
Wrap Up
31
32

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Nutrient Sensitive Technologies (1).pptx

  • 1. 1
  • 2. Role of advanced and nutrient sensitive technologies in nutritional security Prof. Dr. Masood Sadiq Butt National Institute of Food Science & Technology, Faculty of Food, Nutrition & Home Sciences, UAF.
  • 3. 3 Circuiting points Food and nutritional insecurity in Pakistan Nutritional and health challenges Advanced and nutrient sensitive technologies for nutritional security
  • 4. • Globally, micronutrient malnutrition has affected over 2 billion people i.e. more extensive than protein-energy deficiency, prevailing > 900 million people • In Pakistan, 58% households are facing food insecurity ▫ Food insecurity in rural areas reported up to 60.6% in contrast to 52% among urban population NNS (2011) Food and nutritional insecurity in Pakistan Provinces Food insecurity Punjab 59.5% KPK 28.2 % Sindh 72% Baluchistan 63.5% FATA 58.4% AJK 57.1 % 4
  • 5. Nutrition security ▫ Nutritionally adequate or balanced diet ▫ Safety of nonessential nutrients i.e. phytonutrients ▫ Availability of micronutrients ▫ Ensure protein digestibility ▫ Safe foods from microbiological aspect ▫ High quality food ▫ Accessibility of eco-friendly processing procedure ▫ Educational motivation for healthy food choices
  • 6. ▫ Poverty and unemployment ▫ 6th most populous country over the globe ▫ Time constraints faced by working women in food preparation & child care ▫ Difficulty in losing excess body fat due to closely spaced pregnancies ▫ Suboptimal breastfeeding ▫ Mono-cropping with cereals; adverse impact on soil nutrition ▫ Inadequate supply of safe water & sanitation facilities ▫ Street foods prepared under unhygienic conditions ▫ Lack of information & education to make prudent food choices ▫ High reliance on monotonous staples Nutritional and health challenges faced by Pakistan 6
  • 7. Food and nutritional insecurity in Pakistan • Prevalent deficiencies include iron, zinc, folate, vitamin A & D deficiencies • Vulnerable segments; pregnant & lactating women and young children • Deficiencies occur due to limited access to natural micronutrient-rich foods or fortified foods; either too expensive or locally unavailable • Micronutrient malnutrition is amongst 10th leading causes of infectious illnesses and mortality 7
  • 8. • Old paradigm ▫ Green revolution; increased food production or food security  No focus on nutritional value and human health  Displaced traditional crops dominant in limiting micronutrients • New paradigm ▫ Ultimate objective; linking agriculture to achieve nutritional security and improving human health Paradigm shift 8
  • 9. • Consumers are aware of links between diet and health hence looking for food options with multiple benefits; good taste and disease prevention • Popular dietary interventions include single & multiple food fortification and designer & excipient foods but proper distribution channel is needed • Synergism between nutrients and phytochemicals confer optimal health benefits thereby retention should be maintained at highest possible levels from farm to fork • Thermal processing contribute irreversible losses of nutritional quality thus non-thermal technologies are necessitated Dietary interventions and challenges 9
  • 10. Advanced and nutrient sensitive technologies 1. High pressure processing 2. Pulsed electric field 3. Hurdle technology 4. Supercritical fluid extraction system 5. Encapsulation 6. Ohmic heating 7. Ultrasonic heating 8. Microwave vacuum heating 9. Irradiation
  • 11. High Pressure Processing (HPP) • Maintain sensorial and nutritional value ▫ Limited effects on covalent bonds • Applicable for liquid and packed solid foods • HPP properties; ▫ Hydrostatic pressure same in all directions ▫ Transmitted uniformly and immediately via pressure transferring medium (water) ▫ Independent of product size and geometry • Determinants of HPP effectiveness ▫ Extrinsic factors; temperature, time, pressurization or decompression rate and number of pulses ▫ Intrinsic factors; food composition and physiological states of microorganisms
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  • 14. Cont… • Universally applicable to all food types, some dairy and animal products and shelf-stable low-acid foods • Extend shelf life of meat by controlling the growth of both spoilage and pathogenic bacteria ▫ Salmonella spp. ▫ Listeria monocytogenes • Enable consumer to access foods with distinct advantages over thermally processed foods; ▫ Such as minimally processed, fresh-tasting, high quality convenient products with extended shelf life
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  • 16. Pulse Electric Field (PEF) processing • Require very short electric pulses (μs) at high electric field strengths (kV/cm) • Inherent ability to uniformly and simultaneously treat entire food • Good prospects for being used in the fruit juice industry ▫ Stabilize fruit juices, maintaining nutritional and sensorial properties  PEF-treated orange juice (35 kV/cm, 1000 μs) retain more vitamin C i.e. 91.2% than heat-treated orange juice 82.8% (94.6 °C, 1min) • Electric field strength, treatment time, pulse frequency, pulse width and polarity significantly affect antioxidant capacity
  • 18. Effect of PEF against microorganisms • Mechanical breakdown of microbial membranes via electrical effects, not by electrically induced thermal effects • Electrical fields (16 kV/cm) reduce vegetative population of bacteria • Less effective in destroying spores and enzymes
  • 19. Hurdle technology • Combination of several preserving elements (called hurdles) give answer of consumer perspectives; ▫ Demand for healthier foods, retaining their original nutritional value ▫ Shift towards convenience foods, requiring little further processing ▫ Consumer preference for safe food, free from preservatives • e.g. combination of HPP with antimicrobials or moderate thermal treatment
  • 20. Hurdle technology; HPP+Temperature • HPP (300-1000 MPa) and temperature (> 70 ᵒC); ‘‘High Pressure Sterilization (HPS)’’ ▫ Reduce microbial spores ▫ Minimize undesirable enzymatic reactions ▫ Compromises nutritional value depending on food matrix and severity of conditions  Pressure and temperature (600-850 MPa, 75-80 ᵒC for 40 min); degrade ascorbic acid by 50-70% in fruit juices
  • 21. Hurdle technology; HPP+Antimicrobials • HPP and antimicrobial agents; bacteriocins, lactoperoxidase and nisin; work synergistically to increase bactericidal effects • Microorganisms tries to maintain constant physiology when stress factor disturbs their environment • Different hurdles act simultaneously against several targets, causing metabolic exhaustion of cell • High pressure damages membranes causing cell permeability allowing easy entry of antimicrobials into the cells under pressure i.e. “pressure-promoted uptake”
  • 23. GREEN extraction principles • Principles to establish green label; ▫ Use CO2 as solvent alternative to organic solvents ▫ Ensure safe, clean and high quality extract ▫ Improve and optimize existing processes ▫ Favor safe, robust and controlled processes ▫ Rapid extraction ▫ Higher extraction yield than conventional method ▫ Low extraction temperature for heat labile compounds ▫ Concentrated analytes ▫ Reduce energy consumption
  • 24. extraction principle • Two step recovery of phytochemicals; 1.Solubilization and extraction of bioactive molecules from plant matrix into SC-CO2 2.Separation of extracted moieties from SC-CO2 by decreasing pressure or solvation power 24 Extraction from leaf gland
  • 25. 25 Sample Restrictor CO2 Extract in collector Extraction cell SC-CO2 cylinder Pump CO2 CH3OH
  • 26. Benefits; Novel Technique • Novelty in nutraceuticals extraction from plants; ▫ Short extraction time and high recovery ▫ Efficient penetration of solvent into plant matrix ▫ Low temperature, avoiding oxidative reactions ▫ Better extract quality ▫ Free from organic solvent residues ▫ Reduction in storage and disposal cost 26
  • 28. Encapsulation • Delivery vehicle for functional ingredient to food system • Packaging technique to trap active ingredients within coating material • Delivery system specifically designed; ▫ To shield active ingredient from surrounding environment • Deliver active ingredients; ▫ At appropriate time ▫ To targeted point within the human body ▫ By using particular release mechanism
  • 29. Release mechanisms • Depends on nature of application; 1. Mechanical rupture of capsule wall via pressure 2. Wall dissolution via solubility or chemical reaction 3. Thermal release or melting of wall by diffusion 4. Slow erosion of shell 5. Biodegradation
  • 30. Microencapsulation benefits ▫ Trap minerals, vitamins, flavors, essential oils and polyphenols ▫ Protect functionality & structural integrity of fragile phytoceuticals ▫ Separation from incompatible components ▫ Stabilize shelf life of active ingredients ▫ Mask undesirable taste, odor, color and texture ▫ Enhance visual aspect and marketing concept ▫ Improve processing, handling and safety of active agent ▫ Controlled and targeted release in physiological system
  • 31. • Political dimension; policy-makers must ensure safe, nutritious and wholesome foods for healthy living • Economic dimension; increasing employment opportunities to ensure availability, access and uniform food distribution among masses • Technological dimension; use of nutrient sensitive techniques for the development of value added products, ensuring nutritional security • Social dimension; creating awareness among general public regarding diet-health linkages and eco-friendly processing procedures at commercial and household levels • Cultural dimension; utilizing diversified indigenous crops for the development of convenience foods to combat prevailing nutritional deficiencies Wrap Up 31
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Editor's Notes

  1. In Punjab, 59.5% are food insecure of those that were food insecure 32.2 % were food insecure without hunger In KPK, only 28.2 % were food insecure Sindh appeared as most food deprived province accounting 72% households as food insecure with 21.1% population as food insecure without hunger After Sindh, Baluchistan was more by food insecurity accounting up to 63.5% Food security data from FATA revealed 58.4% as food insecure In AJK about 57.1 % are food insecure In Gilgit Baltistan, about 39.8% were food insecure
  2. Food insecurity; limited availability of nutritionally adequate and safe foods Nutrition security; provision of environment that encourages and motivates society to make food choices consistent with short and long term good health Nutrients are components in foods that an organism uses to survive and grow. Macronutrients provide the bulk energy an organism's metabolic system needs to function while micronutrients provide the necessary cofactors for metabolism to be carried out.
  3. Most vulnerable segments include pregnant & lactating women and young children; For pregnant woman, risk of dying during childbirth or giving birth to underweight or mentally-impaired baby For lactating mother, risk of poor health and development of breast-fed infant For young child, risk of dying due to infectious diseases or impaired physical and mental development
  4. Excipient foods are specifically designed food products; contain ingredients that may have no bioactivity; improve efficacy and bioactivity of co-ingested bioactives
  5. Gamma radiation Ultrasound system Ohmic heating Extrusion technology Microwave and microwave vacuum preservation
  6. μs; microsecond kV/cm; kilovolt/centimeter
  7. A supercritical fluid (SCF) is any substance at a temperature and pressure above its critical point, where distinct liquid and gas phases do not exist. It can effuse through solids like a gas, and dissolve materials like a liquid.
  8. Fragile; easily broken or physically week