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Nonsense Mutations In The Chlamydomonas Chloroplast Gene That Codes For The Large Subunit Of Ribulosebisphosphate Carboxylase/Oxygenase, Robert J. Spreitzer, Michel Goldschmidt-Clermont, Michele Rahire, Jean-David Rochiax

Department of Biochemistry: Faculty Publications

The Chlamydomonas reinhardtii chloroplast mutants 18-SB and 18-7G lack both the chloroplast-encoded large subunit and nuclear-encoded small subunit of the chloroplast enzyme ribulose-1,5-bisphosphate carboxylase/oxygenase (EC 4.1.1.39). A chloroplast intergenic-suppression model has been postulated to account for the genetic instability of 18-5B revertants. Here, we have determined the molecular basis of the 18-SB and 18-7G mutants. They contain nonsense mutations close to the 3' and 5' ends of their large-subunit genes, respectively. Puls-chase experiments revealed that the 18-SB mutant produces a truncated large subunit that is unstable. In connection with previous experiments, this work identifies nonsense suppression in the chloroplast. Small …

Cloning And Characterization Of A Gene (Fadr) Involved In Regulation Of Fatty Acid Metabolism In Escherichia Coli, Concetta C. Dirusso, William D. Nunn

Department of Biochemistry: Faculty Publications

The regulatory gene fadR has been previously characterized by classical genetic means as a diffusible protein which exerts negative control over fatty acid degradation and acetate metabolism. fadR has also been implicated in the regulation of unsaturated fatty acid biosynthesis. To facilitate the identification of the product of the fadR gene and to study the mechanism by which this multifunctional regulatory gene exerts its control, we cloned a segment of DNA containing the fadR gene in the phage vector λL47. Subsequent subcloning of a segment of the chromosomal DNA from the λfadR⁺ phage into various plasmid vectors resulted in …

Notes On Maternal Behavior And Post-Brooding Aggression In The Prairie Skink, Eumeces Septentrionalis, Louis A. Somma

Papers in Herpetology

Observations of three female prairie skinks (E. septentrionalis) obtained in Omaha, NE, in 1983, including nest building, oviposition, incubation, defensive behavior, grooming of hatchlings, neonatal care, and post-brooding aggression.

Predation In Insular Plant Dynamics: An Experimental Assessment Of Postdispersal Fruit And Seed Survival, Enewetak Atoll, Marshall Islands, Svata M. Louda, Paul H. Zedler

Svata M. Louda Publications

We studied predation upon the fruits of four common terrestrial plant species of atolls by excluding: 1) all predators; 2) large predators only; and 3) no predators. Each of these treatments was located within the vegetation at three distances from the shore: beach edge of fringing thicket; middle of the thicket; and inner forest. The plants were Terminalia catappa, Messerschmidia argentea, Scaevola taccada, and Guettarda speciosa. Predation loss over the year was significant (P < 0.01) for all four species. Location contributed significantly only for S. taccada. Amount of loss and predominant type of seed predator for a plant species were related to size and conspicuousness. The largest fruits, …

The Effects Of Prey Depletion On The Patch Choice Of Foraging Blue Jays (Cyanocitta Cristata), Alan Kamil, Sonja I. Yoerg

Papers in Behavior in Biological Sciences

Blue jays (Cyanocitta cristata) were trained to hunt for non-cryptic moths presented in projected images. On each trial, the jays chose one of two patches to hunt in: (1) a uniform, “non-depleting” patch with constant prey density of 0.25; or (2) a “depleting” patch in which prey density changed during the foraging bout. In the depleting patch, the initial prey density was 0.50, declining to zero in a single step part-way through each foraging bout (session). The patch choices of the jays were greatly affected by these conditions. The jays chose the depleting patch early in the session, …

Development And Life Cycles, Gerald D. Schmidt

Harold W. Manter Laboratory of Parasitology: Faculty Publications

Embryological development and biology of the Acanthocephala occupied the attention of several early investigators. Most notable among these were Leuckart (1862), Schneider (1871), Hamann (1891 a) and Kaiser (1893). These works and others, including his own observations, were summarized by Meyer (1933) in the monograph celebrated by the present volume. For this reason findings of these early researchers are not discussed further, except to say that it would be difficult to find more elegant, detailed and correct studies of acanthocephalan ontogeny than those published by these pioneers.

Since Meyer's monograph, many studies have been published on most aspects of …

A List Of Records Of Freshwater Aspidogastrids (Trematoda) And Their Hosts In North America, Sherman S. Hendrix, Malcolm F. Vidrine, Raymond H. Hartenstine

Harold W. Manter Laboratory of Parasitology: Faculty Publications

Published records for the six species of North American freshwater aspidogastrid trematodes from molluscs and vertebrates have been compiled, listing both hosts and localities for state or province. Seventeen new unionid mussel hosts (Bivalvia) are reported for Aspidogaster conchicola along with new state records for Arkansas, Connecticut, Delaware, Maryland, Mississippi, North Carolina, New York, Virginia, and San Luis Potosi (Mexico); 12 new unionid host species for Cotylaspis insignis, with new state records for Arkansas, Delaware, Massachusetts, Mississippi, New Jersey, Rhode Island, and Wisconsin; five new unionid hosts for Cotylogaster occidentalis, with new state records for Connecticut, Delaware, Florida, …

Nearshore Foodwebs And The Distribution Of Acanthocephalan Parasites In Antarctic Seabirds, Eric P. Hoberg

Harold W. Manter Laboratory of Parasitology: Faculty Publications

Field studies, in the vicinity of Palmer Station during the austral summer of 1982— 1983, yielded an extensive collection of acanthocephalans and other parasites from seabirds, fish and invertebrates. The continuing analysis of this material has resulted in the elucidation of factors that control the occurrence of Corynosoma spp. in Antarctic seabirds. Notably, the host-distribution of Corynosoma spp. suggested that these parasites were being acquired from piscine or possibly amphipod prey, generally in nearshore habitats.

Extrafloral Nectaries On Plants In Communities Without Ants: Hawaii, Kathleen H. Keeler

School of Biological Sciences: Faculty Publications

Since the Hawaiian Islands lack native ants, it was hypothesized that extrafloral nectaries, an ant-related mutualistic trait, should be lacking on native species. Presence of extrafloral nectaries (EFNs) on plants was determined by direct observation and related to vegetation structure and floral composition. Frequency of plants with EFNs was low by all possible comparisons. However, several endemic species had functional EFNs. The hypotheses to explain these anomalies are (1) phylogenetic inertia or (2) mutualism with some other organism than ants.

Introduction [To Biology Of The Acanthocephala], Brent B. Nickol

Harold W. Manter Laboratory of Parasitology: Faculty Publications

Introduction to Biology of the Acanthocephala, edited by D.W.T. Crompton and Brent B. Nickol; Cambridge University Press, 1985.

Development And Life Cycles: [Chapter 8 In Biology Of The Acanthocephala], Gerald D. Schmidt, Brent B. Nickol

Harold W. Manter Laboratory of Parasitology: Faculty Publications

Embryological development and biology of the Acanthocephala occupied the attention of several early investigators. Most notable among these were Leuckart (1862), Schneider (1871), Hamann (1891a) and Kaiser (1893). These works and others, including his own observations, were summarized by Meyer (1933) in the monograph celebrated by the present volume. For this reason findings of these early researchers are not discussed further, except to say that it would be difficult to find more elegant, detailed and correct studies of acanthocephalan ontogeny than those published by these pioneers.

Since Meyer's monograph, many studies have been published on most aspects of the biology …

Epizootiology: [Chapter 9 In Biology Of The Acanthocephala], Brent B. Nickol

Harold W. Manter Laboratory of Parasitology: Faculty Publications

In practice, epizootiology deals with how parasites spread through host populations, how rapidly the spread occurs and whether or not epizootics result. Prevalence, incidence, factors that permit establishment of infection, host response to infection, parasite fecundity and methods of transfer are, therefore, aspects of epizootiology. Indeed, most aspects of a parasite could be related in sorne way to epizootiology, but many of these topics are best considered in other contexts. General patterns of transmission, adaptations that facilitate transmission, establishment of infection and occurrence of epizootics are discussed in this chapter.

When life cycles are unknown, little progress can be made …

How Does Familiarity Affect Visual Search For Letter Strings?, John H. Flowers, Doris J. Lohr

Department of Psychology: Faculty Publications

Subjects visually searched for letter string targets consisting of either familiar English three-letter words (e.g., SEX) or featurally similar nonword trigrams (e.g., SFX). Distractor items were either words or nonwords and had varying degrees of feature overlap with the target among different blocks of trials. Search was facilitated by a word-nonword category distinction between target and distractors, particularly when target-noise feature overlap was high, but such facilitation consisted of slope reductions in an apparently serial, self-terminating search pattern as opposed to a "pop-out" effect.

Intellectual Violence, Democratic Legitimation, And The War Over The Family, Michael R. Hill

Department of Sociology: Faculty Publications

This paper presents a view of democratically rationalized repression as a framework within which to discuss Brigitte Berger and Peter L. Berger's recent anti-feminist, bourgeois apologetic: The War over the Family: Capturing the Middle Ground. The Bergers' book is presented as an example of intellectual violence, a ruthless attempt to legitimate continuing patriarchal dominance through perverted appeals to "democracy" and democratic principles of fairness and consensus.

A Frotarsius Chatrathi, First Tarsiiform Primate (? Tarsiidae) From Africa, Elwyn L. Simons, Thomas M. Bown

United States Geological Survey: Staff Publications

Tarsiiform primates have long been regarded as a Laurasian group, with an extensive fossil record in the Eocene of North America and EuropeI and two important but less well-known records from Asia.

The Pentastomid Sebekia Mississippiensis Sp. N. In The American Alligator And Other Hosts, Robin M. Overstreet, J. Teague Self, Kent A. Vliet

Harold W. Manter Laboratory of Parasitology: Faculty Publications

Sebekia mississippiensis sp. n. is described from Alligator mississippiensis in Louisiana, Mississippi, and Florida. Closely related to S. oxycephala in South American crocodilians, it differs by having a smaller and less spinous hook shield, a broader base for the posterior extensions of the oral cadre. and a thinner and more delicate tegument. The male reproductive system differs somewhat from that described for other pentastomids. Nymphs parasitize several fishes as well as turtles, snakes, and mammals.

Namru-3 Translations Of Parasite Literature From Russian, French, Japanese, Etc. Into English (1929-1985) T1701-T1800, United States Naval Medical Research Unit Number Three, Cairo, Medical Zoology Department

United States Naval Medical Research Unit 3: Publications

T1701. TRANSLATION FROM RUSSIAN, OVEZMUKHAMMEDOV, A. and SAF'YANOVA, V. M. (1983), Occurrence of amastigotes of Leishmania gymnodactyli in the peripheral blood of Gymnodactylus caspius and Agama caucasica. Parazitologiya, Leningrad. 17(3):185-188.

T1702. TRANSLATION FROM RUSSIAN. YASTREBOV, V. K. and YURLOV, K. T. (1978). Possible arbovirus dissemination in western Siberia in connection with data on migrations and overwinterings of west Siberian birds. Dokl. Simp. Transkont. Svyazi Pereletn. Ptits Rol' v Rasp. Arbovirus. (Novosibirsk, July-August, 1976), pp. 167-172.

T1703. TRANSLATION FROM GERMAN. MOSKVIN, I. A. (1929). On the role of the tick Ornithodoros papillipes Bir. (Ixodoidea) in transmitting relapsing fever in Turkestan. Z. …

Estimating Crop Residue- Using Residue To Help Control Wind And Water Erosion, Elbert C. Dickey, John Havlin

Department of Agricultural and Biological Systems Engineering: Faculty Publications

The Importance of Conservation Tillage

Conservation tillage has been practiced for many years and is becoming increasingly popular with Nebraska farmers. Recent surveys show, about 8 of 19 million cropland acres in Nebraska were farmed with conservation tillage systems. Conservation tillage includes a variety of tillage and planting systems that leave at least 30 percent of the previous crop's residue on the soil surface after planting.

Knowing how to measure or estimate residue cover is an important facet of conservation tillage. A minimum requirement of cover on the soil surface is often specified for U.S. Department of Agriculture programs and …

Soil Compaction I Where, How Bad, A Problem, Elbert C. Dickey, Thomas Peterson, Dean E. Eisenhauer, Paul J. Jasa

Department of Agricultural and Biological Systems Engineering: Faculty Publications

Soil compaction is a more common problem now than it was 15 years ago, regardless of the tillage system used. Producers now use heavier tractors, larger implements, bigger combines, earlier spring tillage, reduced tillage, and no-till planting systems.

While all of these have a potential to increase compaction, the major cause of the problem is conducting field operations when the soil is too wet. Most think about tilling wet soils in the spring as being the major problem, but harvesting a too-wet field in the fall can cause just as much compaction. Large combines and auger wagons can have loads …

Privacy, Confidentiality, And Autonomy In Psychotherapy, William J. Winslade, Judith Wilson Ross

Nebraska Law Review

I. Introduction

II. The Concepts of Privacy and Confidentiality ... A. Background and Overview ... B. Privacy ... 1. Law ... 2. Economics ... 3. Anthropology ... 4. Philosophy ... 5. Psychology ... 6. Summary: Core Concepts of Privacy ... C. Confidentiality

III. Privacy and Confidentiality in Law ... A. Constitutional Law ... B. Tort Law ... C. Privilege Law ... 1. In Re Lifschutz ... 2. Caesar v. Mountanos ... 3. Tarasoff v. Regents of the University of California

IV. Privacy and Confidentiality in Psychotherapists' Professional Ethics Codes ... A. Overview of Ethics Codes ... B. Form and Content …

Reminiscences: My Forty-Year Romance With Malaria, G. Robert Coatney

Transactions of the Nebraska Academy of Sciences and Affiliated Societies

Looking back some 55 years since beginning my graduate studies, I have come to appreciate my good fortune: (1) to have inaugurated and carried out, over a period of some 35 years, a three-pronged research program (birds, simians, and man) against the world's most important infectious disease-malaria -and during two-thirds of that time, carrying worrisome administrative responsibilities; (2) to have participated in national and international efforts towards alleviation and control of that disease; (3) to have had a remarkable group of professional and subprofessional people who shared all kinds of problems; (4) to have received full support of my scientific …

The Paul Sears I Know, Rufus H. Moore

Transactions of the Nebraska Academy of Sciences and Affiliated Societies

A compact review of the contributions Paul B. Sears made to science should be part of the record commemorating the 60th anniversary of his presidency of the Nebraska Academy of Sciences. The recollections presented here refer to the multitude of things he has done, primarily as an ecologist. However, the overriding objective is to give a glimpse of the exceptional person his associates have come to know.

Chemical And Radiological Composition Of Air And Ground Water Near The Mineralized Uranium Ore Deposit At Crawford, Nebraska, Arthur W. Struempler

Transactions of the Nebraska Academy of Sciences and Affiliated Societies

Data on chemical composition of ground water collected from the "post-Middle Chadron" Oligocene strata are compared with those from water of the basal Chadron hydrological unit in an area near Crawford, Nebraska, where uranium mineralization is known to occur. Uncorrected Eh values, using a calomel reference electrode, indicated water from the "post-Middle Chadron" Oligocene unit was positive, whereas water from the basal Chadron was negative. The basal Chadron waters contained lower levels of calcium and uranium and higher concentrations of sodium, chloride, sulfate, and total dissolved solids, than did waters from the "post-Middle Chadron" Oligocene zone. Radon and radium concentrations …

Grasshopper Dietary (Orthoptera: Acrididae) From A Nebraska Sand Hills Prairie, Anthony Joern

Transactions of the Nebraska Academy of Sciences and Affiliated Societies

Species-specific selection of host plants by grasshoppers from a Sand Hills grassland in Nebraska is documented by identifying fragments of plants from the foregut. Results from this study are compared with a similar study performed in a mixed-grass pasture near North Platte, Nebraska. On average, a larger number of plants was included in the diet of species at Arapaho Prairie. Differences in specific composition of diets were observed in some cases.

Annotated Checklist Of The Amphibians And Reptiles Of Nebraska, John D. Lynch

Transactions of the Nebraska Academy of Sciences and Affiliated Societies

Thirteen species of amphibians and 47 species of reptiles presently are known from Nebraska, including one species of lizard here reported for the first time. Although Nebraska has no obvious geographic barriers within its borders, most species (50) have range limits within the state. Fourteen species have essentially statewide distributions and 12 others occur widely over eastern Nebraska. With the exceptions of the two species of leopard frogs (one found over the northern half of Nebraska and the other over the southern half) and eight species of reptiles whose distributions are strongly influenced by the Sand Hills, the remaining species …

Transactions Of The Nebraska Academy Of Sciences Volume Xiii (1985): Table Of Contents

Transactions of the Nebraska Academy of Sciences and Affiliated Societies

Nebraska Academy of Sciences, Officers, Policy Committee .......... ii

Editorial Board, Instruction to Contributors .......... v

Membership Objectives and Friends of the Academy .......... vi

Meet Dr. Bob! (M. H. Pritchard) .......... 1

Reminiscences: My forty-year romance with malaria (G. R. Coatney) .......... 5

Biological and Medical Sciences

Mosses of the Great Plains X. The Niobrara Valley Preserve and adjacent area in Nebraska (S. P. Churchill) .......... 13

Grasshopper dietary (Orthoptera: Acrididae) from a Nebraska Sand Hills prairie (A. Joern) .......... 21

Annotated checklist of the amphibians and reptiles of Nebraska (J. D. Lynch) .......... 33

Water quality of a …

Water Quality Of A Limited Segment Of The Big Blue River In Nebraska, Marvin C. Williams, Harold G. Nagel, Clayton E. True

Transactions of the Nebraska Academy of Sciences and Affiliated Societies

A water quality study was conducted on the Big Blue River in Nebraska, U.S.A., from the city of Seward to the Kansas state line. Fifty-one sites were sampled in a five-day period in August 1973; limited sampling was also done in May 1974. The primary purpose was to evaluate the effects of the effluent of eight sewage treatment plants, located along 196 km (122 miles) of the river upon water quality of the river and to collect baseline ecological data.

The following water quality constituents were evaluated: total P, NH₃-N, N0₃-N, 0₂ (dissolved), pH, temperature, …

Mosses Of The Great Plains X. The Niobrara Valley Preserve And Adjacent Area In Nebraska, Steven P. Churchill

Transactions of the Nebraska Academy of Sciences and Affiliated Societies

Seventy·two species of mosses distributed among 43 genera and 19 families are reported for the Niobrara Valley Preserve and adjacent area. Fourteen new state records of mosses are added to the Nebraska flora. Distributional affinities for the mosses corroborated biogeographical data and hypotheses involving a strong western (arid and montane), northern (boreal), and eastern (temperate) taxic influence due to past vegetational changes associated with Pleistocene events.

Meet Dr. Bob!, Mary Hanson Pritchard

Transactions of the Nebraska Academy of Sciences and Affiliated Societies

Dr. G(eorge) Robert Coatney was known to many as "Mr. Malaria" because of the leadership he provided for the malaria research and chemotherapy programs during World War II and the Korean War. He is known to many of us affectionately as "Dr. Bob." I first met Dr. Bob early in my parasitological career when he would come to Lincoln to visit his mother and other family members. He often visited Harold W. Manter, too. Although they only brushed shoulders in 1926 as Coatney was leaving and Manter was arriving at the University of Nebraska, the two developed a firm and …

The Variability Of Holocene Climate Change: Evidence From Varved Lake Sediments, Walter E. Dean, J. Platt Bradbury, Roger Y. Anderson, Cathy Barnosky

United States Geological Survey: Staff Publications

Varved sediments from a lake near the present forest-prairie border in northwestern Minnesota provide an annual record of climate change for the last 10,400 years. Climate-sensitive mineral, chemical, and biological components show that the mid-Holocene dry interval between 8500 and 4000 years ago is asymmetrical and actually consists of two distinct drier pulses separated by a moister interval that lasted about 600 years. Cyclic fluctuations with periods of several hundred years were abrupt and persistent throughout the Holocene and are most clearly recorded within the two drier pulses.