Seminar for the Fruit Week 2018 Fruit Research Center, DOA, Horana - - PowerPoint PPT Presentation

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Seminar for the Fruit Week 2018 Fruit Research Center, DOA, Horana - - PowerPoint PPT Presentation

Dec 29, 2022 114 likes •755 views

Terrence Madhujith B.Sc. (Agric.) (SL), M.Sc. (Canada), Ph.D. (Canada) MIBiol.(SL) Professor in Food Science and Technology University of Peradeniya Seminar for the Fruit Week 2018 Fruit Research Center, DOA, Horana July 09, 2018

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Terrence Madhujith B.Sc. (Agric.) (SL), M.Sc. (Canada), Ph.D. (Canada) MIBiol.(SL) Professor in Food Science and Technology University of Peradeniya

Seminar for the Fruit Week – 2018 Fruit Research Center, DOA, Horana July 09, 2018

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 Introduction  Diet and health  Fruit consumption  The role of fruits  Nutrients in fruits  Bioactives in fruits  Fruit consumption and diseases

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 Iron  Folic acid  Vitamin A  Vitamin D  Iron deficiency anemia – school children,

women, pregnant women

 Low birth weight  Stunting and wasting

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 How much do we eat?  University study  Recommended – 400 g per day excluding

tubers

 USA – 700 g per day  Daily fruit consumption – 200 g minimum

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 Rich in minerals  Rich in vitamins  Rich in phytochemicals  Rich in dietary fiber  Low in fat  Low in sodium

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 Vitamin C  Vitamin A  Vitamin E  Vitamin B complex  Vitamin K

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  • Ca
  • Cr
  • Cu
  • Se
  • Fe
  • Mg
  • Mn
  • Mo
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 More sugar

Less sugar

 Less starch

More starch

 Dietary fiber

Less dietary fiber

 Less protein

More protein

 Less fat

More fat

 Vitamins A,E,C

Vitamin B

 More phytonutrients

Less phytonutrients

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 Reduces

  • Plasma cholesterol levels (TC)
  • Some toxicants and carcinogens
  • DM

 Promotes GI health

  • Speeds up transit
  • Promotes gut microflora
  • Reduces pressure in lower bowel
  • Reduces incidences of appendicitis
  • Reduces incidences of diverticulitis
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 Soluble DF

  • Pectins
  • Gums
  • Mucilages and some hemicelluloses

 Insoluble DF

  • Cellulose
  • Most hemicelluloses
  • Lignins
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 Slows GI transit  Slows glucose absorption  Lowers glycemic load  Lowers plasma cholesterol

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Seminar for Rahula College, Kandy June 07, 2013

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 Postprandial hyperglycemia results in

  • DM
  • Atherosclerosis (a risk factor)
  • Renal diseases ?
  • Cancer?

Seminar for Rahula College, Kandy June 07, 2013

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 Speeds up GI transit  Increase fecal weight  Lowers starch hydrolysis  Delays glucose absorption

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 Bale fruit  Mango  Nelli  Guava  Jack fruit  Durian  Mangosteen  Anona

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 25-35 g DF per day  6-8 g per meal is recommended

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 There is clinical evidence that probiotics helps

  • Reducing the incidents of diarrheal illnesses
  • Enhancing immune function
  • Reducing the degree of severity of lactose

intolerance

  • Reduce the population of harmful MOs
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  • Reduce the incidences of colon cancer
  • Lower serum cholesterol levels
  • Lower blood pressure
  • Improve mineral absorption
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Thilini Mahaarachchi and Terrence Madhujith

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  • Matured, ripe fruits from home gardens

Artocarpus heterophyllus Aegle marmelos Annona squamosa Durio zibethinus

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Treatment Day 0 7 14 21 28 Annona 9.7b ± 0.03 9.6b ± 0.07 8.5d ± 0.05 7.0d ± 0.05 6.8e ± 0.06 Bale fruit 9.9b ± 0.03 9.9c± 0.05 9.2a ± 0.01 8.6a ± 0.07 8.0a ± 0.04 Jack fruit 9.8b ± 0.04 9.8b ± 0.02 8.8c ± 0.05 8.1bc ± 0.03 7.2c ± 0.02 Duriyan 9.8b ± 0.03 9.7b ± 0.02 9.0b ± 0.05 8.0b ± 0.03 7.1d ± 0.01 FOS 9.9b ± 0.04 9.9c ± 0.04 9.2a ± 0.01 8.2b ± 0.03 7.6b ± 0.03 Control 8.6a ± 0.03 8.1a ± 0.03 6.4e ± 0.04 6.4e ± 0.07 5.9f ± 0.03 Table 1. Variation of cell count of the media containing different fruit extracts during the storage period

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5 5.5 6 6.5 7 7.5 8 8.5 9 9.5 10 Annona Bale fruit Jack fruit Duriyan FOS Control

Bacterial count Log10 value Fruit extract

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 Anona

showed the lowest performances throughout the storage period

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  • Intermediate performances throughout the

storage period

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  • Intermediate performances throughout the

storage period correspond to the standard prebiotic

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  • Bale fruit maintained standard count of greater than 108

CFU/mL with S. thermophilus throughout the 28 days of storage

  • Duriyan and jack fruit maintained standard counts

up to 21 days

  • This target was achieved by annona added sample only up

to 14 days

  • The control showed the standard microbial count only up

to 1 week

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Why do we need antioxidants?

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 Any species capable of independent

existence that carries one or more unpaired electrons

NOO. NOO.

O2

.-

O2

.-

ROO. ROO. CCl3

.

CCl3

.

RS. RS. OH. OH.

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R•

Vitamins Proteins Enzymes Lipids & other biomolecules

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 Scavenging FR  Reducing LDL oxidation  Reducing lipid oxidation  Breaking down oxidative products  Removing initiators  Protecting DNA/RNA and other biomolecules

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 Nutritive antioxidants  Non-nutritive antioxidants  Fruits are rich in both

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 vitamin C  vitamin E  carotenoids- lycopene, lutein and zeaxanthin

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 Passion fruit  Tangerines  Oranges

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 Orange  Tomato  Lavalu

Lycopene Tomato

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Polyphenolic compounds

 Flavonoids  Anthocyanins

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  • Terpenoids and saponins
  • Enzyme inhibitors
  • Glucosinolates
  • Essential fatty acids
  • Lignans and related compounds
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Anthocyanins Colorful compounds Powerful antioxidants Found in grapes berries

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 Anthocyanins are

  • Powerful antioxidants
  • Some possess anticancer activity
  • Leach into water
  • Destroyed at high temperatures
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 Association between F&V consumption and

CVD – American Nurses’ Health Study (2004)

 Cardioprotective agents in fruits

  • Carotenoids
  • folate
  • Polyphenols
  • Fiber
  • Other vitamins
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 Platelet function  Vascular function  Hypertension  Lipid profile

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 Regular consumption of grapes, berries and

pomegranate has reduced platelet aggregation potential

 Peak concentration after 1-3 hours  Excreted within 8-12 hours  Fruits containing polyphenols reduce BP  Pomegranate and berries have shown the

best results

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 Vascular activity  Vascular endothelium dependent

vasodilation

 Pomegranate, apple and grape seeds have

shown positive results

 Cinnamic acid, anthocyanins,

proanthocyaninds and tannins are responsible

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 Fruits rich in anthocyanins,

proanthocyanidins

 Grapefruit and oranges are the most

contributing fruits

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 Reduction of BP by 5 mm/Hg brings about

reduction of stroke by 40% and CHD by 20- 25%

 45% of CHD is due to abnormal lipid profile 

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 Fruits and Vegetable consumption and cancer

–World Cancer Research Fund/American Institute of Cancer Research and World Cancer Research Fund (1998)

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Site of cancer Relationship Mouth and pharynx weak Esophagus Strong Lung Moderately consistent Stomach Moderately consistent Pancreas Very strong – limited data Liver Possible for Vegetables Not with fruit

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Colon and rectum Possible for vegetables. Breast Moderately consistent with vegetable – not with fruits Cervix Strong with fruits – limited data Bladder Moderately consistent – limited data

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Bopitiya, D. and Madhujith, T. (2012). Antioxidant potential of pomegranate (Punica granatum L.) cultivars grown in Sri Lanka. Tropical Agricultural Research 24(1):71-81.

W.K.A.D.Ekanayake, Terrence Madhujith, D. Bopitiya and R.D.C.S.Ranadheera (2013). Quantification of phenolic content and evaluation of oxidative stability of sesame oil (Sesamum indicum) Proceedings of the Annual Symposium of International Society for Nutraceuticals and Functional Foods, November 02-05, Taipei, Taiwan

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 Detoxifying carcinogens  Cell apoptosis  Changes in cell signaling  Changing hormone profile  Protecting DNA  Increased DNA repair  Stimulation of immune system  Anti inflammatory effects  Reducing serum cholesterol  Antimicrobial activity

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Bioactive Effect Terpenoids & saponins (sesquiterpenes, triterpenes, tetraterpenes) Hypolipidemic and hypocholesterolemic Enzyme inhibitors (protease & amylase) – Bowman –Birk type Prevent development of chemically induced cancer of liver, lungs, colon, esophagus Glucosnolates and breakdown products Block tumors induced by chemicals Phenolics/polyphenolics Cehmopreventive, modulation

  • f key signal transduction

pathways, modulation of arachidonic acid metabolism, antioxidant and hormonal effects Carotenoids Antioxidant Lignans Antioxidant

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 Our fruit consumption is not satisfactory  Diet is important for health  Fruits are very important functional foods

Fruits help reduce many diseases

 More efforts are required to pouplarize fruits

among Sri Lankans

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Thank You