Lesson I Flashcards
the country has a high demand in wood consumption but has ____ production
low
the country needed __ million cubic meters of wood annually
6
25% of the national demand comes from local resources while _____
is imported
75%
______ and ______ has one of the highest demands especially in
households, industrial and commercial use
charcoal; fuelwood
[PEP] wood waste is accounted ____ percent of the over-all NRE estimates of the country
44
_____ and _______ are known to be composed of polysaccharides; lignin is oxygenated polymer of phenylpropane units
cellulose; hemicellulose
wood chem in forestry help us understand the plant anatomy, use of organic chemical,
biochemical and the physiological processes of plants for efficient
management of the forest resources
true
wood chem in forestry help us to know how ______ take place, how sunlight and water taken by the tree is use to make food
photosynthesis
wood chem in forestry help in the area of _____, through chemical test we know medicine that heal different type of disease
medicine
a branch of natural science that deals principally with the properties of substances, the changes they undergo, and the natural laws that describe these changes
CHEMISTRY
involves the study of the atomic composition and structural architecture of substances, as well as the varied interactions among substances that can lead to sudden, often violent reactions
CHEMISTRY
is the study of the chemical components and characteristics of wood.
WOOD CHEMISTRY
Goods and services derived from the forest such as but not limited to timber, lumber, veneer, plywood, fiberboard, pulpwood, firewood, bark, tree top, resin gum, wood oil, honey, beeswax, nipa, rattan or other forest growth such as grass, shrub and flowering plant, the associated water, fish, game, scenic, historical, and educational
FOREST PRODUCTS
Forest Products Classification:
- MAJOR FOREST PRODUCTS
- MINOR FOREST PRODUCTS
- EXTRACTIVES
Comprises Timber and Fuel wood. Fuelwood, Log, Lumber, Plywood, Veneer, Non-timber forest products, Blackboard
MAJOR FOREST PRODUCTS
MAJOR FOREST PRODUCTS:
- Primary Wood Products
- Secondary Wood products
are those products use in raw form.
Ex. Logs, poles, piles, post, mine timber, railroad ties.
Primary Wood Products
are those products that undergone further
remanufacturing.
Secondary Wood products
Secondary Wood products:
- Mechanically reduced wood products
- Physically reduced wood products
- Chemically reduced wood products
These are reduced using machines or
mechanical means.
Ex. Wooden chairs, cabinets, veneers, crates etc.
Mechanically reduced wood products
This are wood products derived by
applying heat on wood like charcoal, (product of carbonization), wood tar and alcohol
product of distillation.
Physically reduced wood products
They are results of applying chemical
methods of processing wood.
Examples are pulp and paper, fiberboard, and cellulosed-derived products.
Chemically reduced wood products
Forest usufructs obtained from
fruits, flowers, leaves, twigs, bark, root and wood of plants (except timber)
and other products from animal and mineral origins
MINOR FOREST PRODUCTS
non-structural components of wood
EXTRACTIVES
EXTRACTIVES:
- Tree exudents
- Extracted Products
natural discharges of living trees and other forest growths induced by a natural or inflicted wound on the plant
Tree exudents
Tree exudents:
A. RESINS
B. GUMS
C. SAPS
D. LATEX
- Manila copal (almaciga), dammar (dipterocarp) and balau (apitong, Manila Elemi (“brea blanca) or white pitch
RESINS
– eucalyptus, acacia species, cherry and plum trees
GUMS
– Moraceae species
SAPS
- chicle, rubber, and gutta-percha
LATEX
– chemically derived or reduced
Extracted Products
Extracted Products:
a. dyes
b. Tannins - from mangrove species,
oak species, sakat and camatchile
c. naval stores – Obtained from pine
species, distillation of resin produce
gum turpentine and gum resin.
d. essential oils - ex. Olive oil,
- All biological materials and derivatives
other than timber, which are extracted from forests for human use.
Synonymous to Non-wood forest products
Non-timber Forest Products
Non-timber Forest Products:
a. bamboo
b. rattan (split and unsplit)
c. nipa shingles
d. medicinal plants
e. fibrous plants (bast fibers) Fibers from inner bark
f. leaves, fruits and vines
g. animal-based products (horns, fur, etc.)
e. other NTFPs not listed
