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Determination Of Selenium In Biological Materials By Stable Isotope Dilution Gas Chromatography-Mass Spectrometry, Donald C. Reamer, Claude Veillon

United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications

Selenium can be determined quantitatively in biological samples after digestion using nitric acid, orthophosphoric acid, and hydrogen peroxide and the formation of 5-nitropiazselenol. Samples are spiked with enriched ⁸²Se and lsotoplc ratio of ⁸⁰Se to ⁸²Se is measured by combined gas chromatographymass spectrometry using dual ion monitoring. Precise determination at the parts-per-billion level is possible. The accuracy of the method Is verlfied by using standard reference materials.

Housing And Management To Reduce Climactic Impacts On Livestock, G. Leroy Hahn

United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications

Weather is a constraint on efficient livestock production systems. Evaluation of the degree of constraint is a difficult, but necessary task before selection of appropriate modifications in management or environments can be made. The basis for rational selection from available alternatives for the limitation of climatic stress in livestock has continued to improve, particularly with the development of rudimentary functional relationships between animal performance and weather parameters. Such relationships, when combined with probabilistic knowledge of the weather parameters, permit prediction of the reduction in animal performance under natural conditions, or of the benefits to be derived from proposed housing or …

Preliminary Report On The 1979 Excavations At The Clary Ranch Site, Thomas P. Myers, Richard G. Corner, Lloyd G. Tanner

Transactions of the Nebraska Academy of Sciences and Affiliated Societies

During the summer of 1979 excavations at the Clary Ranch Site (Ash Hollow, Garden County, Nebraska) demonstrated the presence of a Late Paleoindian bison-butchering site. Bison tooth-eruption patterns indicate that the kill took place in late spring to early summer. Turtle and canid bones were also recovered. The presence of Frederick and Meserve points suggests an antiquity of more than 8,500 yr for the site.

Production Rates Of Aquatic Insects In A Turbid Reservoir, John C. Lund, Edward J. Peters

Transactions of the Nebraska Academy of Sciences and Affiliated Societies

Buckley Creek 3F is a turbid 13 ha reservoir in southeastern Nebraska. The quality of the environment was assessed in 1977 with an annual production estimate of the benthic insects.

Monthly bottom samples were taken using a 15 cm (6 in.) Ekman dredge. To observe any correlation between production and other factors, chemical and physical parameters consisting of total alkalinity, hardness, pH, conductivity, salinity, temperature, dissolved oxygen, and suspended solids were monitored.

Total benthis production was 0.156 g/m²/yr (dry weight). Individual genera produced between 0.001 (Chaoborus sp.) and 0.057 g/m²/yr (Hexagenia sp.). Published studies …

Spatial Memory And The Performance Of Rats And Pigeons In The Radial-Arm Maze, Alan B. Bond, Robert G. Cook, Marvin R. Lamb

Papers in Behavior in Biological Sciences

The resource-distribution hypothesis states that the ability of an animal to remember the spatial location of past events is related to the typical distribution of food resources for the species. It appears to predict that Norway rats would perform better than domestic pigeons in tasks requiring spatial event memory. Pigeons, tested in an eight-arm radial maze, exhibited no more than half of the memory capacity observed in rats in the same apparatus and may not have used spatial memory at all. The results were interpreted as supporting the hypothesis.

Peptidohydrolases Of Soybean Root Nodules, Nasir S. A. Malik, N. E. Pfeiffer, D. R. Williams, Fred W. Wagner

Department of Biochemistry: Faculty Publications

Nodule extracts prepared from Glycine max var Woodworth possessed endopeptidase, aminoptidase, and carboxypeptidase actiities. Three distinct endopeptidase activities could be resolved by disc-gel electrophoresis at pH 8.8. According to their order of increasing electrophoretic mobility, the first of these enzymes hydrolyzed azocasein and n-benzoyl-LLeu-β-naphthylamide, while the second hydrolyzed n-benzoyl-L-Arg-/8- naphthylamine (Bz-L-Arg-/βNA), n-benzoyl-L-Arg-β-nitroanilide (Bz-L-Arg-βNA), and azocasein. The third endopeptidase hydrolyzed Bz-L-Arg-βNA, Bz-L-Arg-βNA, and hemoglobin. Fractions of these enzymes extracted from electrophoresis gels were shown to have pH optima from 7.5 to 9.8. AU of the endopeptidases were completely inhibited by diisopropylphosphorofluoridate, demonstrating that they were serine proteases.

Lavender, A Chick Melanocyte Mutant With Defective Melanosome Translocation: A Possible Role For 10 Nm Filaments And Microfilaments But Not Microtubules, Paula Mayerson, John Brumbaugh

School of Biological Sciences: Faculty Publications

Lavender is a mutation of chick neural-crest-derived melanocytes showing dilute feather pigmentation. This defect, previously attributed to a lack or attenuation of dendrites, was found to be due to a defect in melanosome translocation. The mutant phenotype, of melanin-congested perikarya and pigmentless dendrites is expressed both in vivo and in vitro. Studies with colcemid and cytochalasin B suggest that the avian melanocyte resembles a dispersing amphibian melanophore in its requirement for microfilaments but not microtubules.

Ultrastructural analysis revealed a normal complement of intracellular filaments. Microtubules, however, are scarce. Intermediate (10 nm) filaments surround and are closely associated with intracellular organelles, …

Cover Of Plants With Extrafloral Nectaries At Four Northern California Sites, Kathleen H. Keeler

School of Biological Sciences: Faculty Publications

Percent cover of plants with extrafloral nectaries was investigated in three California habitats with the same physiognomy as habitats previously studied in Nebraska (perennial native grassland, riparian forest, deciduous forest). In contrast to Nebraska where cover of plants with extrafloral nectaries reached 14 percent, no plants with extrafloral nectaries were found in any California transect. Chaparral was also studied; no plants with extrafloral nectaries were found.

Genetic Structure Of Two Species Of Waterstriders (Gerridae: Hemiptera) With Differing Degrees Of Winglessness, Anthony J. Zera

Anthony Zera Publications

The Gerridae (Hemiptera: Insecta) is a worldwide family whose constituent species exhibit dramatic inter- and intra-specific variation in the degree of winglessness (Brinkhurst, 1960; Vepsäläinen, 1978; Calabrese, 1979). At one extreme, the family contains species which are fully winged in all populations and during all seasons, while several species consist almost exclusively of wingless morphs over large geographical ranges and during all seasons. Many species exhibit the intermediate case of wingpolymorphism: the occurrence of various combinations of fully winged, partially winged and/ or wingless morphs in the same population at the same time. Various wing-polymorphic species show differing patterns of …

Review Of Observations Of Wildlife, Paul A. Johnsgard

Papers in Ornithology

Nearly everybody has a childhood hero, but only rarely do those heros survive the test of time to stand even taller in the mind's eye when approaching a halfcentury of one's own lifetime. Sir Peter Scott is a man of such stuff; his enormous artistic abilities and capacity for converting those talents into the environmental education of several generations of Britons, and toward the conservation of the earth's natural resources, cause him to stand uniquely alone in the international environmental scene. His book is an informal retrospective look at his own life, his artwork, and his concerns for conservation and …

Pseudogymnophallus Alcae Gen. N. Et Sp. N. (Trematoda: Gymnophallidae) From Alcids (Charadriiformes) In Subarctic Seas, Eric P. Hoberg

Harold W. Manter Laboratory of Parasitology: Faculty Publications

Pseudogymnophallus alcae gen. n. et sp. n. is described for trematodes from alcids (Charadriiformes: Alcidae) from the North Pacific region (Gulf of Alaska, Bering Sea, and Chukchi Sea): horned puffin, Fratercula corniculuta; tufted puffin, Lunda cirrhuta; parakeet auklet, Cvclorrhvnchus psittacula, and least auklet, Aethia pusilla; and from the western North Atlantic Ocean, (Gulf of St. Lawrence): razorbill, Alca torda. Pseudogymnophallus is distinguished from other genera of Gymnophallidae by the intertesticular position of the ovary; a cylindrical, undivided seminal vesicle; and by an intestinal diverticulum dorsal to the arch of each cecum.

Differentiation Of Late Fourth And Early Fifth Stages Of Ascaris Suum Goeze, 1782 (Nematoda: Ascaridoidea) In Swine, P. A. Pilitt, J. Ralph Lichtenfels, F. G. Tromba, P. A. Madden

Harold W. Manter Laboratory of Parasitology: Faculty Publications

The morphology of late fourth and early fifth stages of Ascaris suum in swine was studied with light and scanning electron microscopy. Late fourth-stage larvae have dome-shaped lips, that are broadest at the base and incompletely separated laterally. The lips bear coarse, triangular dentides, irregularly spaced on the internomedial and internolateral walls. Large double papillae are located on the middle of the external lip surface. The cervical region gradually increases in width posteriorly. The late fourth-stage cuticle is marked by a coarse transverse striation and bears incomplete longitudinal ridges, creating a brickwork pattern; longitudinal alae are present. Late fourth and …

Blood Flow To The Corpus Luteum-Bearing Ovary And Ipsilateral Uterine Horn Of Cows During The Oestrous Cycle And Early Pregnancy, S. P. Ford, J. R. Chenault

United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications

Total ovarian blood flow of cows (sum of flows through the ovarian artery and uterine branch of the ovarian artery), measured by electromagnetic flow probes, followed a consistent cyclic pattern, being highest from Day 10 of the oestrous cycle (oestrus = Day 0) until 4 days before the subsequent oestrus. During this period of high ovarian blood flow, blood of uterine origin flowed to the ovary through the uterine branch of the ovarian artery and was found to comprise 20-40% of the ovarian blood flow. Between Days -4 and -3, ovarian blood flow dropped (P < 0·01)from 3·2 ± 0·5 to 1·0 ± 0·4 ml/min, coincident with a reversal of flow through this anastomosis. Uterine arterial blood flow was highest (P < 0·05)from 1 day before oestrus to the day of oestrus when compared to the remaining days of the oestrous cycle. Throughout the oestrous cycle, ovarian blood flow was positively correlated with systemic concentrations of progesterone (r = 0·55, P < 0·01)and negatively correlated with systemic concentrations of oestradiol-17β (r = -0·42, P < 0·01). In contrast, uterine arterial blood flow was negatively correlated with systemic progesterone (r =-0·25, P < 0·05) and positively correlated with systemic oestradiol (r = 0·45, P < 0·05). These data provide direct evidence in the cow that a portion of the blood flowing to the ovary containing a fully functional corpus luteum is contributed by the ipsilateral uterine artery.

Newsletter Of The Association For Documentary Editing, Volume 3, Number 4, December 1981.

Documentary Editing: Journal of the Association for Documentary Editing (1979–2011)

No abstract provided.

Recent Developments In The Hospital Shared-Service Organization Controversy, Chris M. Goodrich

Nebraska Law Review

I. Introduction

II. Recent Developments

III. The Issues … A. The Section 502 Argument and Associated Hospital … 1. The Validity of the Section 502 Regulations … a. The Background of the Section 502 Regulations … b. The Hospital Bureau Case … c. Congressional Response to IRS Tenacity—Section 501(e) … d. Associated Hospital—A Break with Precedent … 2. The Application of Section 502 in Associated Hospital … B. The Section 501(c)(3) Argument

IV. Conclusion

Through The Trap Door Darkly: Nebraska Exemption Policy And The Bankruptcy Reform Act Of 1978, Richard F. Duncan

Nebraska Law Review

I. Federal Bankruptcy Exemption Policy

II. Nebraska Exemption Policy and the Bankruptcy Reform Act … A. The Nebraska Homestead Exemption … 1. Family Headship Requirement … 2. Ownership Requirement … 3. Occupancy Requirement … 4. Dollar Limitation … 5. Reconsideration of the Homestead Exemption … B. Other Nebraska Exemptions … 1. The Exemption in Lieu of Homestead and the Specific Exemption … 2. Wage and Other Exemptions

III. Conclusion

Morphological Variation In The Southeastern Pocket Gopher, Geomys Pinetis (Mammalia: Rodentia), Stephen L. Williams, Hugh H. Genoways

University of Nebraska State Museum: Mammalogy Papers

The nominal species of southeastern pocket gophers (Geomys pinetis, G. colonus, G. cumberlandius, and G. fontanelus), which collectively occupy a geographic range on the Atlantic and Gulf coastal plain of Alabama, Georgia, and Florida, were examined for morphological variation. Univariate and multivariate analyses were used to determine age, sexual, individual, and geographic variation in G. pinetis. Significant differences were found among different age classes and between sexes. Males displayed higher individual variation than females and external measurements were more variable than cranial measurements. Of the four named species in the pinetis-species group (colonus …

Karyology And Morphometrics Of Three Species Of Akodon (Mammalia: Muridae) From Northwestern Argentina, Rubén M. Barquez, Daniel F. Williams, Michael A. Mares, Hugh H. Genoways

University of Nebraska State Museum: Mammalogy Papers

Chromosomal and morphometric studies were conducted on a sample from an assemblage of Akodon spp. occurring in various patterns of sympatry from the provinces of Catamarca, Jujuy, Salta, and Tucumán, Argentina. Results showed three distinct morphometric groups based upon size. Size also varied with age, but there were no significant differences in measurements of males and females. The three morphometric groups have distinct karyotypes. Akodon caenosus Thomas is the smallest of the three, and has a karyotype of 2n = 34, FN = 40. A. boliviensis tucumanensis J. A. Allen is intermediate in size and has 2n = 40, FN …

Results Of The Alcoa Foundation-Suriname Expeditions. Iv. A New Species Of Bat Of The Genus Molossops (Mammalia: Molossidae), Stephen L. Williams, Hugh H. Genoways

University of Nebraska State Museum: Mammalogy Papers

A new species of molossid bat of the genus Molossops is described from Suriname. The new species is a member of the subgenus Molossops where it is distinguished from the other two member species, temminckii and aequatorianus, by larger external and cranial size. A single specimen of the species was taken in northern Suriname in an area of savannah and secondary forest.

Agricultural Experiment Station News December 1980

Agricultural Research Division: News and Annual Reports

CONTENTS:
FROM THE DIRECTOR'S DESK
FUNDING
FAREWELL AND BEST WISHES TO MRS. DELORES SORENSEN
RECEPTION
Sahs Sez
GRANTS AND CONTRACTS
PROJECTS APPROVED
CURRENT RESEARCH INFORMATION SYSTEM
Animal Science Departmental Review
Energy Farm
PERSONNEL

Agricultural Experiment Station News November/December 1980

Agricultural Research Division: News and Annual Reports

CONTENTS:
FROM THE DIRECTOR'S DESK
FAREWELL AND BEST WISHES TO MRS. DELORES SORENSEN
RECEPTION
GRANTS AND CONTRACTS
PROJECTS APPROVED
CURRENT RESEARCH INFORMATION SYSTEM
FEATURE ARTICLES

1980 Fall Field Day

Nebraska Bird Review

1980 FALL FIELD DAY

Sixty people participated in at least part of the 1980 Fall' Field Day, which was held from noon 4 October to noon 5 October at the 4-H Camp, Nebraska National Forest, Halsey, The weather was on the cool side, but nice - maybe too nice, for many of the warblers apparently migrated during the night. Seventy-one species were reported from the Forest or immediately adjacent to it: Mallard, Blue-winged Teal, Wood Duck, Turkey Vulture; Sharp-shinned, Cooper's, Red-tailed, and Swainsons's Hawks; Golden Eagle (an immature, seen over the Camp after most people had left); Marsh Hawk, Osprey, …

Book Review- Nebraska Bird Review (December 1980)

Nebraska Bird Review

BOOK REVIEW

Birds of Africa, John Karmali, 191 pages, 9¾ x 13, The Viking Press, New York, indexed, hardbound, $25.00.

The 72 magnificent color plates, ranging from less than half a page to two pages in size but with most a page or more, are the backbone of the book. They are supplemented by 132 black and- white pictures, mostly smaller. The text includes a foreword by Roger Tory Peterson; a preface containing Karmali's comments on photography; an introduction giving the characteristics - relief, rainfall, vegetation - of Africa in general and East Africa in particular; 37 chapters, one for …

Index Of Volume 48

Nebraska Bird Review

INDEX OF VOLUME 48

A-Z

Achord, Bill 19
Alberts, Frances 19
Alfalfa 58, 61(2), 62, 63(2), 64(2), 65(2)
Analysis of Migration Schedules of Nonpasserine Birds in Nebraska, An 26
Analysis of Migration Schedules of Passerine Birds in Nebraska, An 46
Anemone, meadow 62
Anhinga 27
Aronson, John G Observations of Late Fall Migratory Sandhill Granes, Platte River, Nebraska 20
Ash, green 64(2)

Yellowthroat, Common 12. J8, 39. 42. 53, 65(2). 67, 83
Zeigler, Gary 76
Zeillemaker, C. Fred 3. 15(2), 75, 81 Melly 3, 15(2), 75. 81

Notes- Nebraska Bird Review (December 1980)

Nebraska Bird Review

NOTES

MOTTLED DUCK. On 5 October 1958 I shot but just winged a female Mottled Duck. This was in Howard Co., on the Loup River, which borders our farm. I kept her (which was legal at the time), got a drake from Texas, and had them for years. I reared many young from the pair.

- Wm. W. Lemburg, Rt. 1, Box 96, Cairo, Nebraska 68824

EUROPEAN WIGEON IN SARPY COUNTY. On 28 March 1980, from 4:30 to 5 p.m., I observed a European Wigeon in a flock of migrating waterfowl at a wet field just east of the allied …

More 1979 Nesting Reports, Esther V. Bennett

Nebraska Bird Review

MORE 1979 NESTING REPORTS

Great Blue Heron - 339 active nests in Lincoln, Cherry, Brown, Dawson, and Loup counties, reported by G.A. Wingfield and D.G. Luce.

Black-crowned Night Heron - 47 active nests in Lincoln Co., reported by D.G. Luce.

Least Tern - 4 nests in Holt, Keya Paha, and Knox counties, reported by G.A. Wingfield.

Dickcissels - 4 young, Glenn Cunningham Lake, Omaha, 20 September; several family groups present 27 September, reported by Babs Padelford.

1980 (Fifty-Fifth) Spring Migration And Occurrence Report

Nebraska Bird Review

1980 (Fifty-Fifth) Spring Migration and Occurrence Report

Two hundred ninety-eight species are listed in this report, from 14 localities. The comparable figures for 1979 are 292 species from 12 locations; 1978 300 from 13; and 1977 281 from 13.

The symbols use in the tabulation are:

Ja, Fe, Mr, Ap, My and Je for the months.

Masthead From Nebraska Bird Review (December 1980) 48(4)

Nebraska Bird Review

TABLE OF CONTENTS ON BACK COVER

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 a calendar year basis only) are $6.00 per year in the United States and $7.00 per year in all other countries, payable in advance. Single numbers are $1.75 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.

Whole Issue Nebraska Bird Review (December 1980) 48(4)

Nebraska Bird Review

TABLE OF CONTENTS

1980 (Fifty-fifth) Spring Migration and Occurrence Report ............................ 70

More 1979 Nesting Reports ...................................................... 83

1980 Fall Field Day .............................................................. 84

Book Review ................................................................... 87

Notes ......................................................................... 87

Index of Volume 48 ............................................................. 90

Ratoon Stunting Disease Of Sugarcane: Isolation Of The Causal Bacterium, Michael J. Davis, A. Graves Gillaspie, Russell W. Harris, Roger H. Lawson

United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications

A small coryneform bacterium was consistently isolated from sugarcane with ratoon stunting disease and shown to be the causal agent. A similar bacterium was isolated from Bermuda grass. Both strains multiplied in sugarcane and Bermuda grass, but the Bermuda grass strain did not incite the symptoms of ratoon stunting disease in sugarcane. Shoot growth in Bermuda grass was retarded by both strains.