Forest Sciences Commons^™

The Galvanic Cell Oxygen Analyzer Vs. The Winkler Method For Oxygen Determinations In Paper Mill Wastes, Edwin J. Grossenbacher

Paper Engineering Senior Theses

This study was designed to verify the assumption that the galvanic cell oxygen analyser can be used as a substitute for the Winkler method in determining the dissolved oxygen content of paper mill effluent. The purpose also includes an attempt to show that dissolved oxygen determinations made by either the Winkler method or by the galvanic cell oxygen analyser are of the same magnitude and can be compared directly. The assumption that this is possible has been based upon extensive tests on solutions containing various spent sulfite liquor wastes at various concentrations. These tests show that the electrode measurements are …

Tb20: Preliminary Tables Of Some Chemical Elements In Seven Tree Species In Maine, Harold E. Young, Paul N. Carpenter, Russell A. Altenberger

Technical Bulletins

These tables show the amount in grams for each of twelve elements for the complete tree and the merchantable bole, for seven tree species (red spruce, balsam fir, hemlock, white pine, white birch, red maple, aspen) in terms of five height classes and ten diameter classes.

The Effect Of Fines On Relative Bonded Area, Richard G. Bowler

Paper Engineering Senior Theses

Bonding characteristics of the fibers in a sheet of paper have long been, and still are, difficult to isolate in a manner which will give exact quantitative information on the degree or bonding. It is possible to indicate with strength tests different levels or bonding. Other factors -- fiber strength, fiber length, cell wall thickness, etc.,-- also enter into values obtained in these tests and make the assignment of exact meaning to bonding impossible. The subject of a major port of this literature search deals with measurement of another bonding characteristics, relative bonded area or simply bonded area. This again …

The Breeding Population Of Waterfowl On The Chippewa National Forest, John Mathiesen

USDA Forest Service / UNL Faculty Publications

The purpose of this paper is to describe the characteristics of the breeding waterfowl population on the Chippewa National Forest in north central Minnesota.

Tb18: Mensuration Methods For Site Classification Of Shade Tolerant Tree Species, Leigh E. Hoar Jr., Harold E. Young

Technical Bulletins

All of the climax tree species in Maine are shade tolerant. This means that they have the capacity of surviving and growing slowly in the seedling, sapling and pole-size stages. As a result none of the established methods employing total age are applicable. In searching for a way to overcome this problem an entirely new approach to quantitative site evaluation was conceived. This study evaluates this new mensurational approach to site evaluation for shade-tolerant trees.

Tb17: Fiber Weight And Pulping Characteristics Of The Logging Residue Of Seven Tree Species In Maine, Harold E. Young, Andrew J. Chase

Technical Bulletins

This publication presents information on fiber weight and pulping characteristics of the logging residue of red spruce, red maple, white birch, white pine, balsam fir, hemlock, and aspen. The accumulation of evidence concerning the amount of fiber in the present logging residue and the pulping potential of that residue justifies this synthesis of the various studies in a single publication.

A Study Of The Ferric-Tartrate Complex In Alkaline Solution, Wade J. Adams

Paper Engineering Senior Theses

Introduction

For a number of years, the study of hydrodynamic behavior of cellulose has been limited by the lack of a solvent capable of dissolving this high polymer without degrading its degree of polymerization. The consequence of the degradation is the marked change in the properties of the cellulose molecule in solution. Investigations to improve this problem have generally taken two directions.

The first involves the substitution of derivatives on the reactive alcoholic sites of the molecule (substitution method). This allows the molecule to be dissolved, in appropriate solvents, without degradation during dissolution.

The second involved the search for compounds …

Brightness Improvement During Cold Soda Pulping, Harry Pratley

Paper Engineering Senior Theses

I. Introduction

During cold soda pulping, sodium hydroxide reacts with the lignin-carbohydrate complex to form soluble sodium lignate, and the carbohydrates are made soluble by hydrolysis (17). This lignin reaction, however, occurs only after a major portion of the caustic soda has been consumed in neutralizing the readily available acetyl and methoxyl groups and in hemicellulose dissolution. After the pulping process, the high-yield cold soda hardwood pulps exhibit a brown discoloration. A microscopic examination of the woods from which these pulps were produced (21) revealed that the brown discoloration was due to materials located in the cells of the wood. …

Increasing Sheet Strength By Partial Carboxymethylation, Curt Thies

Paper Engineering Senior Theses

The objective of this thesis was to increase sheet strength by partial carboxymethylation of cellulose fibers. A survey of literature disclosed the fact this had been done

in an alcoholic solution. An experimental procedure of partially carboxymethylating individual fibers in an aqueous solution was developed. It did not increase sheet strength and a second procedure was developed. In this method formed sheets were subjected to a carboxymethylation treatment. An evaluation of test data led to the following conclusions:

1. Dry and wet strength increases were obtained by treating a sheet with caustic.
2. The carboxymethylation procedure did not increase sheet strength, but …

Existing And Potential Outdoor Recreation Resources In Bear Lake Valley, Utah And Idaho, Dennis H. Black

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Providing adequate outdoor recreational opportunities to the public is now a national problem. Of the many influences affecting the demand for recreation, increased income, population increase, sociological changes, and rapidly increasing technological developments are the more important. In the face of these factors, we must plan better to insure sufficient future needs. This will require evaluation and development of many recreation opportunities.

The Bear Lake are of northeastern Utah and southeastern Idaho is situated along U.S. 89 and within close driving distance of much of Utah's population. Up to the present there has been little orderly or planned development of …

Aspen-Elk Relationships On The Northern Yellowstone Winter Range, William J. Barmore Jr.

Aspen Bibliography

No abstract provided.

Forestry Bulletin No. 7: Films And Filmstrips On Forestry, N. T. Samson

Forestry Bulletins No. 1-25, 1957-1972

A bibliography of film and filmstrips covering forestry studies.

Cacodylic Acid As A Silvicide, Maurice W. Day

Aspen Bibliography

This report deals with the effectiveness of cacodylic acid (dimethylarsenic acid) as a silvicide for undesirable trees. Cacodylic acid has been used successfully as an herbicide for the destruction of grasses and weeds. Experimental work with this material was begun during the 1963 field season, and continued during 1964, to permit complete evaluation of the results. It appears that cacodylic acid has considerable potential as a silvicide.

Tb15: The Standardization Of Symbols In Forest Mensuration, International Union Of Forestry Research Organizations

Technical Bulletins

This technical bulletin reprints the recommendations on the standardization of symbols in forest mensuration, originally published in 1959. The recommendations were made by a small working group in Section 25 of the International Union of Forestry Research Organizations, which was appointed at the Congress of the Union held in Rome in 1953. Members of the group were asked to enquire into the possibility of standarizing the use of symbols (and the systems of measurement) in forest mensuration and to make recommendations.

Distribution In Minnesota Of Acer Saccharum, Tilia Americana And Betula Lutea, Edward Flaccus

Journal of the Minnesota Academy of Science

The distribution in Minnesota of three tree species (Acer saccharum, Betula lutea and Tilia americana) of the northern hardwood type have been plotted, using data from the Third Forest Inventory of the Lake States' Forest Experiment Station, herbaria records and records of occurrence from personal and other's field work. Maps are presented that give more detailed distributions than have heretofore been available. All three species show concentration in a belt along the North Shore of Lake Superior. Acer saccharum and Tilia Americana show the expected close correspondence of distribution in this belt and in a broad extension westward, almost to …

Some Interpretations Of A Map On Minnesota Sawmilling, Lyda Belthuis

Journal of the Minnesota Academy of Science

Sawmilling in Minnesota started about the time of settlement and, until 1870, mainly consisted of small mills located in the southern half of the state. Mills along the Mississippi River were mainly in urban centers while the remainder were scattered and associated with the clearing of the land and the meeting of the needs of local communities. After 1870, mills become larger. Many were constructed in northern Minnesota. All used forests in the northern port of the state and reduced them so greatly that, by 1920, the mills closed and were replaced by portable sawmills.

Clear Cutting Alternate Strips And Scarifying In White Spruce And White Spruce-Trembling Aspen Stands To Induce Natural White Spruce Regeneration, Manitoba And Saskatchewan, V.S. Kolabinski

Aspen Bibliography

No abstract provided.

Quaking Aspen (Populus Tremuloides, Michx.), R.O. Strothmann

Aspen Bibliography

Quaking aspen in the most widely distributed tree species in North America (66, 78);^2/ it has a transcontinental range which covers more than 110 degrees of longitude and 40 degrees of latitude. Other common names include quaking asp, aspen, golden aspen, mountain aspen, trembling aspen, Vancouver aspen, poplar, trembling poplar, and popple (44). The terms "quaking" and "trembling" come from the fact that the leaves tremble in the slightest breeze because the leaf petiole is flattened at right angles to the leaf blade. The term "golden" refers to the brilliant gold and yellow of the foliage in the autumn.

Lucille Vinyard Journal 1965, Lucille Vinyard

Lucille Vinyard Journal Collection

No abstract provided.

Preliminary Tables Of Some Chemical Elements In Seven Tree Species In Maine, H.E. Young, P.N. Carpenter, R.A. Altenberger

Aspen Bibliography

No abstract provided.

Hypoxylon Canker Of Aspen: Seasonal Development Of Cankers And Ascospore Ejection In Winter, F.A. Wood, D.W. French

Aspen Bibliography

No abstract provided.

Growth And Change In Structure Of An Aspen Stand After A Harvest Cutting, E.C. Martin

Aspen Bibliography

No abstract provided.

Growth And Yield Of Well-Stocked Aspen And Birch Stands In Alaska, Robert A. Gregory, Paul M. Haack

Aspen Bibliography

No abstract provided.

Aspen Snag Yields Record Bitterbrush Seed Cache, Edward R. Schneegas

Aspen Bibliography

No abstract provided.