Life Sciences Commons^™

Visual Detection Of Cryptic Prey By Blue Jays (Cyanocitta Cristata), Alexandra T. Pietrewicz, Alan Kamil

Avian Cognition Papers

Blue jays learned to respond differentially to the presence or absence of Catocala moths in slides. This detection of the moths by the jays was affected by the background upon which the moth was placed and its body orientation, thus providing an objective measure of crypticity. These procedures are useful for the study of visual detection of prey.

Jack Pine And Aspen Forest Floors In Northeastern Minnesota, Robert M. Loomis

Aspen Bibliography

Characteristics of upland forest floors under mature jack pine and aspen in northeastern Minnesota were investigated.

Biomass Estimation For Some Shrubs From Northeastern Minnesota, David F. Grigal, Lewis F. Ohmann

Aspen Bibliography

Biomass prediction equations were developed for 23 northeastern Minnesota shrub species. The allometric function was used to predict leaf, current annual woody twig, stem, and total woody biomass (dry grams), using stem diameter class estimated to the nearest 0.25 cm class at 15 cm above ground level as the independent variable.

Natural Regeneration Of Northern Hardwoods In The Northern Great Lakes Region, Carl H. Tubbs

Aspen Bibliography

The forest types collectively known as "northern hardwoods" (Quigley and Babcock 1969) occupy nearly 100 million acres in eastern North America.

Some Individual Plant Biomass Values From Northeastern Minnesota, Lewis F. Ohmann, David F. Grigal

Aspen Bibliography

No abstract provided.

Forest Insect And Disease Management : Aspen Mortality At The Maroon Lake Campground, David W. Johnson, Thomas E. Hinds

Aspen Bibliography

At the request of the White River National Forest, Dave Johnson, Plant Pathologist, FI&DM and Tom Hinds, Plant Pathologist, RMFRES, made an evaluation of aspen mortality in the Maroon Lake Campground, Aspen Ranger District during June 13 to 15, 1977. Previously, Hinds (1976) reported accelerated aspen loss in 17 campgrounds, including Maroon Lake, located throughout Colorado and New Mexico (Fig. 1).

Aspen Mortality At The Maroon Lake Campground, Aspen Ranger District, White River National Forest, David W. Johnson, Thomas E. Hinds, G.L. Downing, F.A. Dorrell

Aspen Bibliography

No abstract provided.

Nutrient Transport In Surface Runoff And Interflow From An Aspen-Birch Forest, D.R. Timmons, E.S. Verry, R.E. Burwell, R.F. Holt

Aspen Bibliography

No abstract provided.

A Survey Of Soil Invertebrates In Two Aspen Forests In Northern Minnesota, T.L. Wagner, W.J. Mattson, J.A. Witter

Aspen Bibliography

Productivity of ecosystems depends to a large extent on the quantity of available nutrients. In natural ecosystems, much of the nutrient stock is unavailable because it is bound in live and dead organic matter. Additions to the pool of available nutrients come from several sources, but the largest and most important one is dead organic matter. Therefore, the productivity of ecosystems is often said to be related to the rate of nutrient release from, or the mineralization of, organic litter (Ghilarov 1971, Satchell 1974).

Managing Aspen [Populus Tremuloides] For Wildlife In The Southwest, David R. Patton, John R. Jones

Aspen Bibliography

No abstract provided.

Grindstone Flat And Big Flat Exclosures: A 41-Year Record Of Changes In Clearcut Aspen Communities, Walter F. Mueggler, D.L. Bartos

Aspen Bibliography

No abstract provided.

Growth And Decay Losses In Colorado Aspen, Thomas E. Hinds, E.M. Wengert

Aspen Bibliography

Quaking aspen (Populus tremuloides Michx.) stands in Arizona, Colorado, New Mexico, Utah, and Wyoming (fig. 1) contain an estimated 7.1 billion bd ft of sawtimber (Green and Setzer 1974).

Summary Of Nutrient And Biomass Data From Two Aspen Sites In Western United States, Robert S. Johnston, D.L. Bartos

Aspen Bibliography

No abstract provided.

Biomasse D'Un Peuplement De Peuplier Faux-Tremble Age Six Ans, René Doucet

Aspen Bibliography

The establishment of an experiment designed to study the effect of thinning and fertilization in a 6 year-old trembling aspen stand, provided the opportunity to determine the mass of the standing crop present at the age.

Litter Fall And Chemical Cycling In An Aspen (Populus Tremuloides) Woodland Ecosystem In The Canadian Rockies, J.B. Cragg, A. Carter, C. Leischner, E.B. Peterson, G.N. Sykes

Aspen Bibliography

No abstract provided.

Preliminary Forest Habitat Types Of The Uinta Mountains, Jan A. Henderson, Ronald L. Mauk, Donald L. Anderson, T.A. Davis, T.J. Keck

Aspen Bibliography

Following pioneering work in northern Idaho and eastern Washington by Daubenmire, 1952, 1968, and later in Montana, Idaho, Wyoming and Utah by Pfister et al., 1974; Steele et al., 1974, 1975; Cooper, 1975; Reed, 1969; Ream 1964; and Pfister (1972) on the subalpine fir and engelmann spruce series. This current work covers all forest land in Utah and adjacent Wyoming including that covered by Pfister.

Information Needs For River Recreation Planning And Management, Perry J. Brown

Forest Management Faculty Publications

Information inputs to making decisions about recreational use of rivers are described. Major recreational decisions and possible Inputs to them are Identified. A future scenario for recreational use of rivers Is given and the needed research on information inputs Is Identified within the context of the scenario.

Biomass And Nutrient Content Of Green Material The Size Of Medium And Large Litter, William E. Miller

Aspen Bibliography

No abstract provided.

The Effects Of Temperature On Retention, Michael D. Holt

Paper Engineering Senior Theses

The purpose of this thesis was to study the effects of temperature and concentration of retention aids on retention. This had been a debatable issue between northern and southern paper mills because of their temperature differences.

The retention studies were performed with the dynamic drainage jar and the pilot paper machine at Western Michigan University with good agreement in both cases.

It was found that increasing temperature when using different retention aids had a considerable effect on first-pass retention. The effect of temperature on retention was found to depend on the ionic charge of the retention aid. The cationic polymer …

The Effects Of Variable Double Disk Refining Action On Sheet And Fiber Properties, Gary Flohr

Paper Engineering Senior Theses

The purpose of this project was to evaluate several operating variables of the newly installed Western Michigan University Jones DD 3000 refiner. The operating variables were refiner load in amperes, throughput rate in gallons per minute, and disk speed in revolutions per minute.

On the fiber level, Canadian Standard Freeness was most dependent upon the load and somewhat less dependent upon the tonnage rate and speed. The tonnages used were 4.8, 9.6, and 14.4 T/D. At 9.6 T/D, the refiner used the least HPD/T per 100 ml C.S.F. drop throughout the 300-500 ml C.S.F. range. At 4.8 and 9.6 T/D, …

Comparative Study Of Flotation And Sidehill Washing Stages In Deinking Coated Magazine Stock, Joseph M. Korepta

Paper Engineering Senior Theses

This is a study comparing the effectiveness of removing ink particles, consumption of water, and the retention of coating and/or filler pigments in deinked pulp between the flotation washing method and the counter-current sidehill washing method. Coated magazine waste paper was deinked using 5.3% Sodium Hydroxide at 190°F. The washing stage of both methods was carried out at a .9% consistency and a temperature of 30°C. The results of the study indicate that the flotation method of washing deinked pulp removed the majority of ink particles but did not remove the coating and filler pigments. The …

The Effect Of Various Concentrations Of Alkali With The Adsorption Of Calcium Ions Onto Oleic Acid, Thomas J. Mcapline

Paper Engineering Senior Theses

The purpose of this thesis was to find an optimum condition for the formation of the precipitated calcium soaps. The system investigated included the range of alkali addition of 0 to 1.2 pounds per one hundred gallons (#/100 gal.). A direct relationship between the adsorption with an increasing alkali concentration to a maximum of 145 parts per million calcium ion adsorbed to 833.5 ppm oleic acid when .225 (#/100 gal.) is applied. It shows that any higher concentration of an alkali will level out the maximum calcium adsorption to approximately 140 ppm.

It was also found that the alkali demand …

The Effects Of Ph On Alkali-Swellable Latex Binder Coating Systems, Larry N. Justen

Paper Engineering Senior Theses

Introduction

In recent years there has been a growing demand for the use of synthetic latexes as sole binders in coating formulations. This had been brought about by the shortage of supply and changing prices of natural binders like casein and protein. Synthetic latex binders require no cooking; this increased energy saving over starch becomes more important as fuel prices rise. Synthetic latex systems are easy to handle and they can be combined easily to fit different requirements.

Most synthetic latex systems need a thickener and water retention aid to achieve the right viscosity and flow properties. The new alkali-swellable …

Aspects Of Some Compacted Campground Ameliorating Practices, Keith Foster

Electronic Theses and Dissertations

The purpose of this study was to determine if the direct mechanical manipulation of compacted campground soils, with and without the addition of organic materials and the planting of grasses, had any long lasting effect on the amelioration of these deteriorated campsites. An attempt was also made to determine the natural recovery time for East Texas sandy loam soils using the campground closure method. Closure or partial (seasonal) closure of campsites reduced compaction to an acceptable level in three years. Roto-tilling alone was the least effective treatment. Roto-tilling and the addition of bark or chips to maintain the loose soil …

Nepal Studies Association Bulletin, No. 11, Nepal Studies Association, Donald A. Messerschmidt

Nepal Studies Association Newsletter

No abstract provided.

Review: Management Science Applications To Leisure-Time Operations, Perry J. Brown

Forest Management Faculty Publications

Book review for Management Science Applications to Leisure-Time Operations by Shaul P. Ladany, ed. Amsterdam: North Holland Publishing Company; 1975.

Effect Of Recycling Cooking Liquor And Eliminating The Washing Stage During Chemical Deinking, Thomas H. Ollila

Paper Engineering Senior Theses

The purpose of this investigation was two-fold--first to determine what effects recycling the cooking liquor in varying percentages had upon the final pulp quality, and second to find out what effect eliminating the washing stage had upon the final pulp. The results are not as definite as would have been desired due to variation in the data. Generally, the results showed recycling the cooking liquor left more fines in the pulp resulting in higher tensile, burst, and fold strength. Eliminating the washing stage left more ink particles, pigments, and fines in the pulp which resulted in higher yields, better opacity, …

Structural Comparisons Of Four Plant Communities In The Great Dismal Swamp, Claire Virginia Dabel

Biological Sciences Theses & Dissertations

Four plant communities in the Great Dismal Swamp, located on the coastal plain in southeastern Virginia, were sampled and estimates of density, basal area and aboveground standing crop biomass were determined, Biomass was estimated as 229,800 kg/ha in the Chamaecyparis thyoides community and as 344,500 kg/ha in the Taxodium distichum community. Biomass for the two hardwood communities, the

Acer-Nyssa community and mixed hardwood (Quercus-Nyssa-Acer-Liriodendron-Liquidamber) community was estimated as 195,700 kg/ha and 194,600 kg/ha respectively and did not differ significantly (P

Comparison Of Urea Formaldehyde, Melamine Formaldehyde, Glyoxal And Latex In Improving The Water Resistance Of The Starch Coatings, Tran Trong Kim

Paper Engineering Senior Theses

Several coatings colors were prepared and applied. The coated sheets were tested with great emphasis on keeping the conditions constant throughout the course of the experimental work. The study utilized several types of insolubilizers: urea formaldehyde, melamine formaldehyde, glyoxal and latex. Two types of starches were also used: regular and cationic.

Results showed the importance of drying on wet rub development of both urea and malamine formaldehyde as compared to latex and glyoxal. Results also proved the superiority of using insolubilizer additions with cationic starch rather than regular starch.

Glyoxal and latex were superior choices to urea and malamine formaldehyde, …

Texas Forestry Paper No. 27, J. David Lenhart, David M. Hyink

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

"Number of 8.7 - foot veneer bolts in loblolly pine trees of old-field plantations in the interior west gulf coastal plain"