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UNIVERSITY OF LIBERIA COURSE CATALOG

 

DEPARTMENT OF WOOD SCI ENCE
Degree of Bachelor of Science
in Wood Science and Technology Requirements

The course of study, which is shown in the Curriculum, takes four years. Minimum requirements for the degree of Bachelor of Science in Wood Science are 137-139 Semester Hours, including 129-131 taken during the semesters and 8 from the Wood Science and Technology Practices conducted in the long vacation periods in Freshman, Sophomore and Junior Years.

The above 137-139 semester hours Include two for ROTC from which foreign students are exempted.

Course Description

Fore 101 - Introduction to Forestry

A brief history of forestry science In relation to forestry. Forest types and their distributions, regeneration, succession, habitat factors, air temperature, climate, atmospheric moisture. Forest benefits, direct and indirect. Agriculture and Forestry - differences and similarities. Outlines of Forest Mensuration. Silviculture, Management, Forest Policy, Harvesting and Utilization. Explanation of a model forest law in relation to the forest taws and regulations of the Republic of Liberia. The importance of Forestry as a profession.

Credit: 1 credit/semester

Fore 102 - Introduction to Agriculture
Agriculture today and its characteristics. Agricultural geography and regional pattern of world agriculture. The possibilities of African rural development in relation to economic and social growth. Scope, importance and possibilities on the development of agriculture in Liberia. The opportunities in agriculture and the function of the agricultural curriculum.

Credit: 1 credit/semester

Fore 201 - Dendrology
Pre-requisites: Biol 103 & 104

Introduction to plant economy principles. Current systems of classification. Most important Monocotyledon and Dicotyledon families. Field identification of Liberian high forest trees using morphological characteristics of crown, leaves, twigs, bark, flower, fruit and stem growth type. Laboratory practice on herbarium techniques and tree identification.

Credit: 3 credits/semester

WSTE 202 - Wood Structure and Identification
Pre-requisites: Biol 104, WSTE 201

Introduction to woody plants anatomy. Stem differentiation and anatomy of cambium and wood tissues. Wood quality in relation to tree growth. Biological organism and wood deterioration. Wood identification using hand magnifier and minute structures using microscopic techniques. Identification of Liberian woods and the use of dichotomus keys for identification.

Credit: 3 credits/semester

WSTE 221 - Sophomore Practice

Log identification in the forest and grading practice, principles of plant inspection.

Credit: 2 credits/semester

Fore 301 - Forest Mensuration

Introduction of measurement for purposes of sale, management and research. Measurement of felled trees, logs and lumber and volume determination. Shape, taper, eccentricity of section and bark-thickness. The board foot measures and log rules. Volume tables. Increment studies. Sample plots and yield tables in plantation. Use of mensuration instruments and their application. Laboratory a regular component.

Credit: 3 credits/semester

Fore 302 - Forest Inventory

The urgent need for forest inventories, and definitions of forest areas, ownership, volumes of standing timber, growth and drain. Enumerations based on coordinated aerial and ground surveys. Photogramme-try and photo-interpretation, maps and determination of forest areas. Estimation of volume of standing timber growth and drain. Systematic, random and stratified random sampling. The introduction of elementary statistical analysis so as to be able to calculate tolerable and reliable minimum estimates of exploitable timber volume.

Credit: 3 credits/semester

WSTE 303 - Saw-milling and Lumber Grading
Milling operation history. Saw milling operations In West Africa and the world. Saw mill types and layout. Energy consumption and waste disposal in saw mills. Saw doctoring principles. Principles of lumber grading. Tropical hardwood lumber grading.

Credit: 2 credits/semester

WSTE 305 -Wood Anatomy and Microscopy
Pre-requisites: WSTE 201 & 202

Advanced microscopic identification, variability and anatomical characteristic of wood and paper-making fibers with special emphasis on LJberian woods.

Credit: 2 credits/semester

WSTE 309 - Wood Behavior (Wood Physics)
Pre-requisites: Chem 102, Phys 104, WSTE 202 & WSTE
303, Math 201

Wood as raw material. Physical behavior of wood chemical components. Density of wood. Wood-moisture relation. Mechanisms of water movement in wood. Dimensional changes in wood. Thermal electrical and acoustical behaviors of wood. Elastic and plastic behaviors of wood. Hooke's Law and elasticity. Anisotropy of wood mechanical behavior. Viscoelastfc behavior of wood. Tensile, crushing and bending strength. Factor controlling failure criteria in wood.

Credit: 3 credits/semester

WSTE 310 - Mechanical Processing of Wood
Prerequisite: WSTE 309

Wood machining history. Orthogonal cutting principles. Sawing technology principles. Band, circular, chain and sash sawing. Planning and Moulding - veneer production methods. Chipping and debarking. Jet and laser machining principles.

Credit: 2 credits/semester

WSTE 314 - Wood Seasoning
Pre-requisites: WSTE 303

Air drying practice in the tropics. Principles of moisture movement. Kiln types and equipment. Maintenance of kiln. Kiln drying operation and kiln samples. Kiln schedules for tropical hardwoods. Drying operations efficiency and seasoning defects. Concepts of solar kilns and solar drying possibilities under tropical environments.

Credit: 3 credits/semester

WSTE 318 - Wood Preservation
Pre-requisites: Chem 102, Phys 104. WSTE 202, WSTE 303

Wood Preservatives, impregnation and diffusion processes. Factors affecting penetrability and absorption. Void volume calculations and preservatives retention. Preparing timber for treatment. Preservation plant layout. Operation and treatment cycles. Practice of vacuum/ pressure impregnation plant. Quality of treated wood. Fire-retarding treatment.

Credit: 2 credits/semester

WSTE 321 - Junior Practice

Mechanical processing principles. Industrial plant operations. Exercise in drying schedules, gluing and wood finishing.

Credit: 5 credits/semester

WSTE 322 - Introduction to Wood Chemistry
Pre-requisite: Chem 101 & 102

Topics in organic chemistry required for a basic understanding of wood'chemistry and chemical utilization of wood. Special emphasis will be placed on carbonyl groups, aliphatic and aromatic hydroxyl groups, stereochemistry, polymerization as well as the chemistry of the three principal components of wood.

Credit: 3 credits/semester

WSTE 401 - Wood Ruid Relationships
Pre-requisites: Chem 102, Math 202, Phys 104

Principles of fluid mechanics. Thermodynamics of wood fluid systems. Hydrogen bonding, Van der Vaal and long range forces. Sorption isotherms and hysteresis. Significance of f. sp. flow in wood. Movement of water, nonpolar liquids and vapors in wood. Permeability and porosity of wood. Diffusion coefficient and Its derivation in wood. Rheo-logy in shrinkage in wood. Stresses developed in wood drying. Application of dry kiln schedule development.

Credit: 3 credits/semester

WSTE 409 - Furniture Production and Finishing
Pre-requisites: WSTE 305, WSTE 309 & WSTE 310

Wood as furniture material. Workshop operation and equipment. Factory processing in furniture industry. Assembly operation. Furniture design principles. Classes of wood finishing materials, schedules of finishing. Chemistry of wood finishing.

Credit: 3 credits/semester

WSTE 411 - Wood Mechanics and Testing
Pre-requisites: Phys 103, Math 202, Math 305, WSTE 309

Mechanical behaviors of woods. Stress-strain relationship in wood and plywood elastic behavior. Time dependency concepts and viscoelas-tic behaviors. Theories of failure In wood standard testing, data and theoretical mechanical behavior. Testing of wood mechanical properties. Variability and procedures of mechanical data analysis.

Credit: 3 credits/semester

WSTE414 -Wood Frame Housing (Design)
Pre-requisltes: Math 202. Math 305, WSTE 309, WSTE 411

Load analysis and design criteria. Elements of theory of elasticity In wood design. Wood beams in bending. Graphical and mathematical calculation of defections plywood box. I beams and fabricated beams. Wooden columns wooden arches. Fastening in wood structure, trees and rigid frame wood structures. Application of frame housing under tropical conditions.

Credit: 3 credits/semester

WSTE 422 -Adhesive and Board Industries
Pre-requlsites: WSTE 305, WSTE 309 & WSTE 310

Theory of Adhesion. Wood Adhesion Chemistry and applications. Art no plastic and phenolic glues. Groups of wood adhesive*. Factors affecting glue bond strongth. Adhesive selection and ingredients for Wood-composite board manufacturing. Plywood production lines. Fiber and particle panel raw materials. Hardboard and tnsolution Board manufacturing. Wet and dry processes. Particle-board production - Rat and extruded boards. Plants layout in board industries. Properties of wood-based panel products. I

Credit: 3 credits/semester

WSTE 430 - Forest Products Marketing
Pre-requlsiteS: WSTE 320, WSTE 405 and/or Fore 403

Volume and value of major forest products in Liberia. Market structure. Marketing channels and cost. Production cost. Operational analysis and programming. Application on tropical hardwood marketing. Promotion of lesser known species in Africa.

Credit: 2 credits/semester

WSTE 490 - Utilization Problems for Juniors
Pre-requisite: Permission of Instructor

Problems related to forest utilization in West Africa. Exposure of students to wood Industry sector in West Africa-

Credit: 1-5 credits/Semester

WSTE 499 - Special Topics
Pre-requisite: Senior Classification

Special topics in the areas of wood science and technology involving research in small projects for seniors and above.

Credit: 1-5 credits/semester

 
 
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