Life Sciences Commons^™

X-Ray Microanalysis In Cryosections Of Natively Frozen Paramecium Caudatum With Regard To Ion Distribution In Ciliates, M. Schmitz, R. Meyer, K. Zierold

Scanning Electron Microscopy

Cells of Paramecium caudatum were shock-frozen without pretreatment for cryoultramicrotomy and freeze-dried for subsequent X-ray microanalysis. Na, Mg, P, S, Cl, K, and Ca were detected in different amounts in several subcellular compartments. In particular, calcium was localized below the cell surface (pellicle). Trichocysts were found to contain significant amounts of Na in their base but not in the tip. Na, Mg, P, S, Cl, K, Ca were found in electron dense deposits within the lumen of the contractile vacuole. A small K concentration was found in the cytoplasm and in the mitochondria. X-ray microanalysis of the element distribution in …

Northeast Research Station Watertown, South Dakota Annual Progress Report, 1984, Agricultural Experiment Station, Plant Science Department

Agricultural Experiment Station and Research Farm Annual Reports

This is the 1984 annual progress report for the Northeast Research Station in Watertown, South Dakota. This report is issued by the South Dakota Agricultural Experiment Station and the South Dakota State University Plant Science Department. This report includes information on the 1984 crop season, climate data, planting dates, potato fertility, spring wheat breeding, oats research, alfalfa variety trials, weed control in sunflowers, sunflower testing, 1985 research plans.

Scanning Electron Microscopy In Retinal Research, Bessie Borwein

Scanning Electron Microscopy

The literature on scanning electron microscopy (SEM) pertaining to the retina has been surveyed and described.

The first two papers on SEM and retina appeared in 1969. Most of the earlier studies concentrated on descriptions [by SEM alone, or with light microscopy (LM) and transmission electron microscopy (TEM)] of the appearance of various retinae and retinal cells [fish, newt, primates, rodents and rabbits, bullfrog]; or embryology of the chick retina. Two papers dealt with retinal disease. In all there were 25 papers in SEM/retinal research before and in 1974. Since 1975 there have been 111 papers which have used SEM …

An Analysis Of The Effect Of Network Load And Topology On The Performance Of Concurrency Control Algorithm In Distributed Database Systems, Anoop Singhal, Amit P. Sheth, Ming T. Liu

Kno.e.sis Publications

Earlier studies in the performance analysis of concurrency control algorithms in distributed database systems (DDBS) have assumed that the message transmission time between any two nodes of a network is constant. Hence they disregard the effect of communication subnet related parameters such as network traffic, network topology, the capacity of transmission channels and the size of messages transmitted. In this paper an analytical model is used to estimate the delays in transmission channels for a DDBS in a long haul network. The analysis shows that the constant transmission time assumption cannot be justified in many cases and that response time …

A Rapid Technique For Counting Cracks In Rocks, W. B. Durham, J. M. Beiriger, H. C. Weed

Scanning Electron Microscopy

Using a scanning electron microscope (SEM) and an image analyzer, we have developed a technique for counting and measuring cracks in rocks which is more efficient than traditional techniques in which an operator performs all image analysis functions. The key aspect of the technique is that black-on-white tracings of fresh cracks, which can be made rather rapidly by an operator, are measured and digitized by an image analyzer. The most time-consuming step in the process has now become the generation of SEM micrographs and pertinent chemical (mineralogical) information, not the quantification of crack structure. The technique has been applied to …

Animals In Testing: How The Cpi Is Handling A Hot Issue, Anonymous

Popular Press Items

No abstract provided.

Index To Volume 52

Nebraska Bird Review

Accipiter sp. 14

Adcock, Dorothy 18, 58

Alexander, George 17

Irene 17

Alfred, Norris 3, 23, 56

Allison, Mary 18

Anderson, RoseAnn 17

Sheridan 17

Ardinger, Bruce 18

Arrowhead (plant) 21

Avocet, American 6, 30, 55(2), 76

. . .

Yellowlegs, Greater 6, 30, 55, 60, 70, 71

Lesser 6, 30, 55, 70, 71

Yellowthroat, Common 11, 33, 40, 41, 50, 64

Zeillemaker, C. Fred 26, 28(6), 29(4), 30(5), 31(3), 32(6), 33, 34(5)

Melly 26

“Notes” From Nebraska Bird Review (December 1984) 52(4)

Nebraska Bird Review

EARLY NESTING WOOD DUCKS. On 7 May 1983 I found a female Wood Duck with newly hatched ducklings at Cedar Island, a property along the Platte River in Sarpy County owned by Metropolitan Utilities District.—Ruth C. Green, Bellevue

GREAT CRESTED FLYCATCHER NEST. On 20 June 1984 I saw Great Crested Flycatchers nesting in a bluebird box. This was at Beaver Lake, Cass Co.—Ruth C. Green, Bellevue

LAZULI BUNTING. I saw a male Lazuli Bunting by the railroad tracks at the foot of Child’s Hollow in Fontenelle Forest, Sarpy County, on 14 May 1984.—Ray Korpi, Bellevue

GOLDEN-CROWNED SPARROW IN BOX BUTTE …

1984 Fall Field Day

Nebraska Bird Review

The 1984 Fall Field Day was held (officially) from noon to noon, 6/7 October, at the4-H Camp at Halsey National Forest. The weather was not the best—light rain early Saturday morning, only a couple of short showers in the afternoon, and no rain Sunday, both days dull and gray. But the attendance was good—87 were officially registered—but the added manpower could not make up for the lateness in the season and the poor weather—the tally on or near the Forest was only 81. In addition, 4 species (marked N) not recorded in the Forest were seen by a party that …

An Exceptional "Fall" Migration Of Shorebirds Along The Big Bend Reach Of The Platte River, Gary R. Lingle, Thomas E. Labedz

Nebraska Bird Review

The Big Bend reach of the Platte River extends about 80 miles from Overton to Chapman, Nebraska. This area is characterized by braided channels with numerous riverine islands bordered by cottonwoods (Populus deltoides) and willows (Salix spp.) along the high banks. Habitat between the high banks consists of open water, barren sandbars and mudflats, herbaceous islands, shrub islands, and floodplain forest.

Prolonged summer flows during 1983 were among the highest recorded this century; in excess of 20,000 cfs (cubic feet per second). Spring 1984 also consisted of high flows resulting in much scouring and shifting of …

Masthead From Nebraska Bird Review (December 1984) 52(4)

Nebraska Bird Review

Published quarterly in March, June, September, and December by the Nebraska Ornithologists' Union, Inc., as its official journal and sent free to all members who are not in arrears for dues. Subscriptions (on calendar year basis only) are $7.00 per year in the United States and $9.00 per year in all other countries payable in advance. Single copies are $2.25 each, postpaid.

Memberships (on a calendar year basis only): Student, $.3.00; Active, $7.00; Sustaining, $15.00; Family Active, $10.00; Family Sustaining, $20.00; Life, $100.00.

All dues and subscriptions should be remitted to the Treasurer, Mrs. Jack Shafer, RR2, Box 61, Wood …

The Prairie Naturalist Volume 16, No. 4. December 1984

The Prairie Naturalist

Paul B. Kannowski, Editor

Nikki R. Seabloom, Assistant Editor

Douglas H. Johnson, Book Review Editor

TABLE OF CONTENTS

VEGETATION PATTERNS IN RELATION TO TOPOGRAPHY AND EDAPHIC VARIATIONS IN NEBRASKA SAND HILLS PRAIRIE ▪ P. W. Barnes, A. T. Harrison and S. P. Heinisch

GREAT BLUE HERON NESTING BIOLOGY ON THE JAMES RIVER IN SOUTH DAKOTA ▪ E. M. Dowd and L. D. Flake

OVENBIRDS AT THE PERIPHERY OF THEIR RANGE IN WESTERN NORTH DAKOTA ▪ R. B. Hopkins

BREEDING BIRD COMMUNITY COLONIZATION OF SOWN STANDS OF NATIVE GRASSES IN NORTH DAKOTA ▪ K. F. Higgins, T. W. Arnold and R. …

Temperature-Dependent Model For Sorghum Midge (Diptera: Cecidomyiidae) Spring Emergence, Frederick P. Baxendale, G. L. Teetes, P. J. H. Sharpe

Department of Entomology: Faculty Publications

A temperature-dependent, two-component model, based on constant-temperature development data, was formulated which described the emergence of overwintered sorghum midges, Contarinia sorghicola (Coquillett) in the field. The first model component used a poikilotherm rate equation to predict emergence rates as a function of temperature. The second component distributed emerging adults over normalized time using a temperature- independent cumulative Weibull distribution. When coupled, components formed a temperature-dependent simulation model which described the spring emergence of overwintered midges from 1979 to 1982. The model tended to predict emergence before it actually occurred in the field. This discrepancy was corrected by incorporating a 1.27-cm …

Nebraska Bird Review (December 1984) 52(4), Whole Issue

Nebraska Bird Review

An Exceptional “Fall” Migration of Shorebirds along the Big Bend Reach of the Platte River … 70

1984 Fall Field Day … 71

Least Tern Eggs in Nests of the Piping Plover … 72

Nesting Common Moorhen in Lancaster County … 74

Cattle Egrets and White-faced Ibises Nesting at Valentine Refuge … 6

Notes … 76

Index of Volume 52 … 78

Nesting Common Moorhen In Lancaster County, William C. Garthright

Nebraska Bird Review

On 6 July 1984, at 6 PM CDT, I saw a Common Moorhen at the Capitol Beach marsh, in Lincoln. It was about 10 yards to the north when I first saw it, and I could see the red facial shield and red bill with yellow tip, the yellow legs, a thin white horizontal line along the side, and prominent white patches along either side of dark undertail coverts. It acted mildly agitated, and swam away from me but stayed in the vicinity.

At 7 the next morning I waded into the pond at that spot. This time I saw …

Performance Of Soybean Varieties In 1984, University Of Tennessee Agricultural Experiment Station, Charles R. Graves

Research Reports

No abstract provided.

Plybond Strength Development Of Secondary Fiber Using The Marine Polymer Chitosan, Christopher G. Sinkovitz

Paper Engineering Senior Theses

The purpose of this study was to investigate plybond strength development of secondary fiber by the addition of the marine polymer chitosan.

The chitosan was applied to refined, lightly refined and unrefined pulp suspensions. Two-ply handsheets were produced with addition levels of .5, 1, 2, 3, and 4 percent chitosan based on fiber weight.

Results indicate that addition of chitosan to two-ply handsheets significantly increased plybond strength from 30 to 120 percent depending on furnish and degree of refining. It was also determined that maximum strength values of selected tests occurred at approximately the two percent addition level of chitosan. …

Effects Of The Degree And Type Of Sizing On The Dyeing Of Paper, J. Pease

Paper Engineering Senior Theses

A study was made comparing papers dyed in a rosin/alum sized system to papers dyed in two alkaline sized systems. The alkaline sizes chosen were alkyl ketene dimer and alkenyl succinic anhydride. The dye types studied were acid, basic, anionic direct, and cationic direct. The degree of sizing was varied for each sizing type to see if the amount of sizing would effect dye retention. The papers dyed with anionic and cationic direct dyes and the basic dye were not significantly effected by sizing type of sizing degree. The direct dyes did give a lighter shade when the rosin size …

Characterization Of Kpni Interspersed, Repetitive Dna Sequence Families And Their Association With The Nuclear Matrix, Joseph A. Chimera

Electronic Theses and Dissertations

The KpnI, 1.2 and 1.5 kb families of interspersed repetitive DNAs from the African green monkey genome were isolated and characterized. Each family contains three populations of segments based on their sequence lengths and susceptibility to cleavage by the restriction enzymes KpnI and RsaI. The first population contains the smallest segments which are susceptible to both KpnI and RsaI cleavage and have fragment lengths of 1.2 kb (1.2 kb family) and 1.5 kb (1.5 kb family) respectively. The members in this population are referred to as KpnI-sensitive segments. The second population contains longer segments (> 2 kb) which represent fusions …

Southeast South Dakota Experiment Farm Annual Progress Report, 1984, Agricultural Experiment Station

Agricultural Experiment Station and Research Farm Annual Reports

This twenty-fourth annual report of the research program at the Southeast South Dakota Experiment Farm has special significance for those engaged in agriculture and the agriculturally related businesses in the nine county area of southeast South Dakota. Reports in this document include information on: temperatures and precipitation data, corn production and performance, soybean research and planting, crop rotation, sorghum, small grains, livestock, and pest control.

Benthic Diatom Community Dynamics In The Colorado River: Interactive Effects Of Periodic Dessication And Current Regime, Christopher Gerard Peterson

Publications (WR)

The response to periodic desiccation of periphyton communities developed in eddy environments or in areas exposed to variable, direct current was examined. Algal communities were incubated on clay tiles for between 2 and 12 weeks in the Colorado River, directly below Hoover Dam from October, 1983 - January, 1984. Mean daily discharge from the dam decreased over this period. To assess the influence of these discharge changes on community dynamics, samples collected over the first 12 weeks of the investigation were compared to samples of the same age collected over the final 8 weeks.

The small diatom taxon Achnahthes spp …

Sulphonation Of Tmp Fibers, Alfonso Bello

Paper Engineering Senior Theses

Paper made from TMP fibers offers good opacity and stiffness, but its use is limited because of its low strength. Chemical post-treatment of TMP offers possibilities of improving strength. Sulphonation of lignin appears to be the most economically feasible treatment. This thesis was oriented toward finding out if sulphonation of TMP fibers would improve the strength properties of TMP handsheets. Southern pine TMP fibers were treated with sodium sulfite (Na₂SO₃). The chemical concentration to be used was between 3-27% in alkali solution between pH 7-9. The temperature was between 90°-150°C. Pulp was consistency was 10%. Handsheets …

The Effects Of Temperature And Ph In Flotation Deinking Of Ultraviolet-Cured Inks, Jeffrey A. Downing

Paper Engineering Senior Theses

Since 1974, the use of ultraviolet-cured inks and coatings has become popular with the printing industry. Unfortunately for the deinking industry, removal of these inks is difficult using conventional methods in the U.S. Theory and laboratory work suggests these special inks may be removed using the flotation process.

It was discovered that the optimum flotation cell temperature for UV-cured inks is not significantly different than the optimum temperature for normal emulsifiable inks. However, optimum cell pH was found to be different between the two inks, and most effective at low pH for UV-cured ink.

Integrated Deinking System, Gregory A. Murray

Paper Engineering Senior Theses

This project concentrated on the development and subsequent results of an integrated deinking system. Although the chemistry and basic principles are quite different, a few European companies are successfully combining the two·systems by taking advantage of the differences.

Advantages of an integrated system over the conventional type included higher brightness, lower ash content and decreased sensitivity to particle size.

The experiment consisted of two different two-stage deinking systems. Each system was run twice; once with a sodium-precipitate chemistry and once with a calcium precipitate chemistry.

The system with first stage flotation, second stage washing and sodium chemistry was determined to …

The Effect Of Temperature On The Emulsification Of Alkenyl Succinic Anhydride, Steven S. Riegsecker

Paper Engineering Senior Theses

The objective of this study is to look at the effect of starch temperature on the emulsification of ASA. Historical information was limited, but it was discovered that an emulsion particle size range of 1-2 microns would give optimum size results.

A continuous emulsification apparatus was constructed using a glass venturi and power syringe to emulsify the starch and ASA. The basic conclusions drawn from the experiment were that the starch temperature did have an effect on the final sizing characteristics of the sheets. It was also possible to correlate a visual inspection of the emulsions with the final test …

Refiner Peroxide Bleaching, Sharon E. Perkins

Paper Engineering Senior Theses

Refiner peroxide bleaching trials were carried out at the Abitibi-Price Research pilot plant using a Sunds-Defibrator CD300 pilot-scale refiner. Results show that, at the pilot scale, blowline addition of bleach liquor gives better brightness gains than addition in the refining zone. Using this technique, brightness gains equivalent to tower bleaching can be obtained when the bleaching parameters are properly controlled. The most important factors were post-refiner retention time and temperature, and the alkali charge in the bleach liquor. These three factors were shown to be highly interdependent. Refining pressure (temperature) was shown to have little effect on brightness gain in …

An Analysis Of Binder Migration During Drying At Different Rates, Tokunbo S. Onadipe

Paper Engineering Senior Theses

The objective of this laboratory study is to quantitatively analyze the distribution of adhesive during drying at different rates. The effect of binder migration on physical paper coating properties was also studied. This report reviews past laboratory studies on binder migration, and the factors that affect binder migration. The coating application was done on a laboratory keegan coater. Dried coating was physically removed using a surface grinder, and the grind offs were analyzed for latex concentration, to determine the degree of binder migration. A gravimetric method of analysis was used to separate the latex and clay. Results showed that the …

The First International Workshop On Multiple Endocrine Neoplasia Type 2 Syndromes, Charles E. Jackson

Henry Ford Hospital Medical Journal

No abstract provided.

Front Matter

Henry Ford Hospital Medical Journal

No abstract provided.

The Calcitonin Assay And Multiple Endocrine Neoplasia Type 2 Syndromes: Historical Footnote, Kenneth E. W. Melvin

Henry Ford Hospital Medical Journal

No abstract provided.