Life Sciences Commons^™

Puckerbrush Pulping Studies, A.J. Chase, F. Hyland, H.E. Young

Aspen Bibliography

No abstract provided.

Bacteria In The Wood Of Living Aspen, Pine And Alder, Marion Bacon, Clayton E. Mead

Aspen Bibliography

The investigations on the microflora in the wood of living trees have up to now dealt almost entirely with the microorganisms associated with diseased trees.

Aerially Applied Anti-Biotics Fail To Control Hypoxylon Canker On Aspen, G.W. Anderson

Aspen Bibliography

No abstract provided.

Complete-Tree Utilization An Analysis Of The Literature Part I: Unmerchantable Top Of Bole, J. L. Keays

Aspen Bibliography

No abstract provided.

Complete-Tree Utilization An Analysis Of The Literature Part Iii: Branches, J. L. Keays

Aspen Bibliography

No abstract provided.

Complete-Tree Utilization An Analysis Of The Literature Part V: Stump-Root System, J. L. Keays

Aspen Bibliography

No abstract provided.

Complete-Tree Utilization An Analysis Of The Literature Part Ii: Foliage, J. L. Keays

Aspen Bibliography

No abstract provided.

The Effects Of Ph On Cationic Agents To Increase The Efficiency Of Tio2 In Paper, Stanley L. Oakleaf

Paper Engineering Senior Theses

The effect of pH on the efficiency of the cationic agents, Kymene 557 (Epichlorohydrin) and Tydex (Polyethylenimine), was studied, and the efficiencies of the two cationic agents were compared.

The pH at which cationic agents are most effective, considering percent retention of titanium dioxide, is pH 5.7 at the time of titanium dioxide slurry addition. The pH for optimum opacity in a sheet is pH 6.0.

A pH that is controlled by alum, rather than independently of alum, produces higher titanium dioxide retentions and opacities. Maximum efficiency is not controlled by pH alone. An alum loading of about 3.5% should …

A Comparison Of Fiber Orientation On Fourdrinier And Verti-Forma Paper Machines Using The Instron Tensile Tester, Paul J. Kiffe

Paper Engineering Senior Theses

Many of the fundamental sheet properties are inter-related with the fiber orientation of the sheet. Until recently, this sheet was made of a Fourdrinier machine and the relationships were thoroughly studied. The advent of the Verti-Forma has opened up a new field of study. The objective of this thesis was to compare the fiber orientation in the two-wire Verti-Forma with the conventional Fourdrinier using the Instron tensile tester.

Test samples were acquired from the pilot Fourdrinier at Western Michigan University, a Fourdrinier at Allied Paper Company, and the Verti-Forms also at Allied. Full and split sheet halves were tested for …

The Application Of Stress-Strain Analysis In Routine Control, Richard L. Memmer

Paper Engineering Senior Theses

Many of the empirical strength tests used for determining end use performance of a paper sheet do not give a true indication of actual sheet properties and performance. The empirical tests of burst, tear, and folding endurance were made on eighteen paper samples of different grades of papers. The fundamental tests of tensile strength, elongation, and tensile energy absorption were also made on the same samples using a stress-strain tester. The fundamental tests were used in showing deficiencies and discrepancies in the empirical test values.

The discrepancies found indicated a need for increased fundamental testing to be use in predicting …

Turbidity Reductions By Enzymatic Hydrolysis, John Nowak

Paper Engineering Senior Theses

Turbidity has long been a problem to the paper industry. In the past, it has been mainly associated with secondary fiber mills, among others. However, with the recent increase in the price of virgin pulp, other mills are seriously considering secondary fiber as a substitute for virgin pulp. Therefore, turbidity may become a problem to a larger number of mills in the future. Turbidity arises when starch and a filler are sheared together in a system. It has been noted in the literature that hypochlorite-oxidized starch produces the greatest turbidity phenomenon.

This project assumed that the size of the starch …

The Effects Of Zeta Potential And Flocculant Molecular Chain Length On The Flocculation Of Fines, Kai F. Chiu

Paper Engineering Senior Theses

The factors controlling floc formation and cohesion are discussed in terms of fiber entanglement, electrokinetic potential and fiber-polymer bridging. The methods of measurement of zeta potential and degree of flocculation are also considered. In addition, an experiment is designed to relate zeta potential, molecular weight of synthetic polymers and the degree of flocculation of fines.

It is found that fiber length is the most predominant factor controlling flocculation. The bridging effect of polymer comes next. The higher the molecular weight, the greater the degree of flocculation. The electrokinetic potential effect is only influential if simple electrolytes are used as flocculant …

Texas Forestry Paper No. 5, K. Kadambi, George Richmond

Texas Forestry Papers, No. 1-29, 1970-1976

"Experimental planting of eucalyptus in the rio grand valley, texas"

Texas Forestry Paper No. 4, Ellis V. Hunt Jr., Robert D. Baker

Texas Forestry Papers, No. 1-29, 1970-1976

"Computer reduces cruise-data compilation error"

Texas Forestry Paper No. 3, J. David Lenhart, Herschel L. Fields

Texas Forestry Papers, No. 1-29, 1970-1976

"Site index curves for old-field loblolly pine plantations in northeast texas"

Sentiment Changes And Recreation Participation, Perry J. Brown

Forest Management Faculty Publications

If participation in recreation activities represents a choice among alternatives, then such discretion may have implications for measuring activity participation. Following is a discussion of the discretionary nature of recreation and the importance of such discretion for use projection which utilizes participation rates. It is proposed that consumer sentiment about the economy at the time participation data are collected is important in evaluating the data and activity projections. The 1960 Outdoor Recreation Resources Review Commission projections indicated that participation in recreation activities would increase by a factor of three from 1960 to 2000 (13). More recent (1965) statistics published by …

Forestry Bulletin No. 21: Diseases Of Forest Trees And Forest Products, A. F. Verrall

Forestry Bulletins No. 1-25, 1957-1972

This bulletin covers the roles and types of diseases and fungi found in forest trees and products. It also discusses principles of disease prevention and control.

World Developments In Increased Forest Resources For The Pulp And Paper Industry, J. L. Keays

Aspen Bibliography

The present report reviews major trends in utilization of world forest resources for conversion to fiber products: pulp, paper, paperboard, composition board and fibreboard. Trends are reviewed from 1930 to the present and cover anticipated extension of these trends to the year 2000.

Forestry Bulletin No. 19: Directory Of Wood-Using And Related Industries In Texas, 1969, Nelson T. Samson

Forestry Bulletins No. 1-25, 1957-1972

Identification and description of wood-using and related industries in Texas for the year 1969.

A Study Of Root Biomass In An Engeimann Spruce-Subalpine Fir Stand In Northern Utah, Larry O. Gadt

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Biomass of roots in the top 6 inches of soil profile was measured . This weight was then used in a stepwise multiple regression to test correlations between root biomass and above ground merisurational parameters.

Total biomass of all roots was 9822 ± 2810 pounds per acre oven dry. Spruce roots weighed 4417 ± 997 pounds per acre; of this spruce roots less than 0.125 inch diameter weighed 2023 ± 347 pounds per acre and biomass of spruce roots greater than 0.125 inch diameter was 2394 ± 8S3 pounds per acre. Total fir roots weighed Sl56 ± 2687 pounds per …

The Development Of A Prediction System For The Occurrence Of Law Violations On The Ogden Ranger District, Weber County, Cache National Forest, Utah, John Henry Harris

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The primary objective of this study was to develop a prediction system for the occurrence of law violations on the Ogden Ranger District, Weber County, Cache National Forest, Utah, whereby the existing manpower and equipment may be used as effectively as possible.

In an attempt to develop the prediction system, 13 variables were chosen that were felt to be related to the occurrence of law violations. These variables consisted on nine weather variables and four use related variables, Of the original 13 variables, 12 variables were significant. The most significant variables that accounted for the greatest portion of the variability …

An Investigation Of Offset Printability In Folding Boxboard Using A Letterpress Printing Test, Roger D. Clemens

Paper Engineering Senior Theses

The primary reason for this investigation was to determine if a simple letterpress test could be used to predict the print quality of folding boxboard printed by the offset method.

The experimental plan was to compare the objective ranking of print quality in the laboratory prints with the subjective ranking of print quality in the commercial prints. If the rankings correlated favorably, there would be reason to suspect that this type of test might be applicable in predicting the millroom print quality of folding boxboard.

It was found that the hoped-for correlation did not exist in this particular case primarily …

A Study Of The Feasibility Of Using A Pulping Aid With Polysulfide Kraft Cooks, Terrence R. Mccarty

Paper Engineering Senior Theses

The purpose of this paper was to determine the feasibility of using a pulping aid with a polysulfide kraft cook. Since any change in an operation such as pulping must yield a product such that the quality is better or not appreciably reduced and at the same time must be economically acceptible, the feasibility was based on these factors. Tests were made on a standard kraft cook, a polysulfide cook, a cook using the pulping aid alone and a cook using the pulping aid with the polysulfides. From the work conducted, there were no significant changes in the physical and …

Use Of The Vandercook Proof Press To Predict Rotogravure Print Quality, Patrick Phee

Paper Engineering Senior Theses

The object of this thesis is to investigate a new idea in predicting printability for rotogravure printing. Present proof presses in the gravure industry are clumsy, expensive, and in most cases, impractical for regular use.

In order to understand the relationship between ink, paper, and plate, it is necessary to consider many variables such as smoothness, ink receptivity, porosity, moisture content, formation, surface strength, and opacity.

The laboratory work performed and presented in this paper shows that a Vandercook proof press may be used to predict printability in the gravure process.

The Effect Of Viscosity On Binder Migration, Richard J. Devries

Paper Engineering Senior Theses

Binder migration has caused many problems in practical applications. There are many variables involved in this field including the base stock, percent solids, the type of pigment and adhesive, and the coat weight.

Bind migration seems to be a function of three almost simultaneously occurring events. These are, migration due to capillary action, pressure, and redistribution during drying.

The procedures used to determine migration in this study included an embedding technique, an infrared technique, and a technique using the IPC brightness meter. The first two techniques failed and only limited information was obtained using the other technique. The most important …

Effects Of Spring Burning On Vegetation In Old Partially Cut Spruce-Aspen Stands In East-Central Alberta, A.D. Kiil

Aspen Bibliography

Competition from minor vegetation greatly affects the survival and growth of conifer reproduction in the Mixedwood Section of the Boreal Forest Region (Rowe, 1955, 1959).

Texas Forestry Paper No. 1, A. F. Verrall

Texas Forestry Papers, No. 1-29, 1970-1976

"Log storage under water spray makes lumber more porous"

Texas Forestry Paper No. 2, Ellis V. Hunt Jr., Robert D. Baker, Leonard A. Lankford Jr.

Texas Forestry Papers, No. 1-29, 1970-1976

"SFA plantation inventory program"

Forestry Bulletin No. 20: A Short History Of Forest Conservation In Texas, 1880-1940, Robert S. Maxwell, James W. Martin

Forestry Bulletins No. 1-25, 1957-1972

"This short history of the development of forest conservation in Texas is intended primarily for the general reader. The study has concentrated on the early history of the conservation movement, dating from the beginning of commercial lumbering in the state, approximately 1880, to about 1940 and World War II."

Lucille Vinyard Journal 1970, Lucille Vinyard

Lucille Vinyard Journal Collection

No abstract provided.