Chapter 3 (vegetables) Flashcards
five composition of plants cells
- cell walls
- vacuoles
- intercellular air
- cytoplasm
- plastids
3 types of plastids and what they contain
- chloroplast - chlorophylls
- chromoplast - carotenoid
- leucoplast - non-pigmented
compunds of vacuoles (4)
water, anthocyanins, flavor compund, organic acids
intercellulair air contributes to what
crispiness and volume
what hemicellulose and pectic substances provide to cell
elasticity and firmness (cement within + between the cell)
role and utility of guam
- ability to absorb water and swell
2. tchickening agent
role of pectic susbstance in industry
thickening and stabilizer, gelling agent, emulsifiers
pectic susbtances contribute to what
cloudiness in juice
part of plant anatomy that contain large amount of water and actively metabolizing part
leaves
what do stem (2)
support, transfer water and nutrients
what tubers do (2)
- storage vessels
2. means to propagate new plants
what bulbs do
storage organ during plant dormancy
what type of vegetable is only one per plant (2)
root and bulbs
what type of vegetables are many by plants (1)
tuber
role of catorenoids (4) + 2 examples
- antioxydants
- anti-inflamation
- reproduction
- vision
ex: carots, dark leafy green vegetables
role of Vitamin C (3) + 3 examples
- enzymatic cofactor
- antioxidant
- immunity
ex: citrus, bell pepper, tomatoes
role of folate (3) + 2 examples
- DNA synthesis
- repair and methylation
- reduces NTDs
ex: dark leafy green vegetables, legumes
role of riboflavin (2) + 3 examples
- antioxidant
- metabolism
ex: mushroom, leafy green vegetables, sea vegetables
phyotchemicals of cruciferous vegetables + roles
indole glucosinolate , protect against some certain cancer
rich sources of lutein + roles (3)
broccoli, kale, corn, pumpkin
– cataracts, macular degeneration, bright light sensitivity
role of luteolin (3)
- antioxidant
- anti-inflammation
- decrease growth of cancer cells
phytochemicals in soybean + role
genistein, decreased risk of breast and uterine cancer
what is degorging (change during cooking/flavour)
removal of bitter compounds using salt/osmoting pressure
why blanching fresh vegetables before frozen
killing enzymes that degrade the product
what legumes in dry storage (5)
potatoes, tomatoes, squash, bulbs, dried legumes
advantages of dry storage
retain texture + flavor
speed up the ripening process
why don’t storage potatoes in the refrigeration
it causes conversion of starch to sugar, leading to waxy texture
what happens when potatoes are exposed to light
create solanine (appears as a greenish tinge on potatoes and it is toxic)
carotenoids with vitamin A
carotene alpha, gamma, beta
cryptoxanthins
role of potassium
important role in fluid balance
role of lycopene (2)
powerful antioxidant
reduce risk of prostate and digestive tract cancer
what happens to the texture during cooking
- gelatinization of starch
- reduction in crunchiness
- softening the cellulose
- dissolving hemicellulose, pectic substances
- calcium salt in industry
- alkaline environment can lead to a mushy texture
4 plant fibers
- cellulose
- hemicellulose and pectic substances
- lignin
- guam
how reduce the bad odors (4)
- shortening cooking time
- adding vinegar to cooking water
- removing cooking lid occasionnaly to let volatiles escape
- put onion in fridge before cutting
tips for retaining nutrients
- minimize the amount of water
- consume liquid left in pan
- shortening the cooking time
- don’t use baking soda
- cook vegetables with skins on
- cut food in bigger chunks (reduces surface area)
what do flowers (3)
- male and female parts
- plant reproduction
- pollination
characteristics of fruits
- protect seeds
2. seed bearing structure of flowering plants
characteristics of roots (2)
- high in CHO
2. draw nutrients and mositure in from the soil
3 examples of tubers
potatoes
ginger root
sunchoke (jerusalem artichoke)
3 examples of flowers
cauliflower, broccoli, artichoke
4 examples of stem
celery
asparagus
anise (fennel)
kohlrabi
5 examples of bulbs
onion shallot garlic leek chives
9 examples of roots
carrots sweet potato radish beet rutabaga turnip celeriac (celery root) jicama parsnip
examples of leaves
kale lettuce chinese cabbage parsley romane spinach bok choy turnip greens
5 examples of vegetables with chlorophylls
broccoli, kate, green cabbage, lettuce, spinach
9 examples of vegetables with carotenoids
carrots, tomatoes, watermelon, squash, red and yellow peppers, peaches, oranges, pineapples, winter squashes
4 examples of anthocyanin
red cabbage, red potato, radish, eggplant
5 examples of anthoxanthin
cauliflower, onions, rices, white potatoes, turnips
number of grams of F and V to consume every day
400g
3 types of xantophylls
cryptoxanthins, lutein, zeaxanthin
what cause the change of colour of the carotenoids when it is cooked (become lighter)
isomerization
flavonoids is found in
vacuoles
structure of flavonoid is characterize by the presence of
flavylium-ion
anthoxantin is sensitive to what (2) + what is the colour
- excessive heating
- presence of metals (Fe,Cu)
1. blue-black or red-brown
colours of betalains in an acid environment
purple to red
colours of betalains in a basic environment
red to yellow
why freezing cause a loss of qualities
due to bursting of cell membranes
what do modified atmospheric packaging
altering permeability of packaging to vapors
water lost results in..
deflation and wilting
optimal humidity
85-95%
3 ways to retain moisture
- spray with mist
- wax coatings
- wrapping with paper towel in ventilated bag
one tip to keep the flavor during cooking
minimize amount of water to avoid leaching of flavor compunds into water
nutrient-specific sensibility to what
heat,light,pH
6 examples of cruciferous vegetables
broccoli, cauliflower, kale, cabbage, turnip, rutabaga
4 examples of allium vegetables
garlic, onion, shallot, leek
5 examples of lutein
broccoli, pumpkin,corn GLV (kale, spinach)
5 examples of luteolin
green pepper, broccoli, herbs (rosemary,parsely,thyme), camomile,celery