Life Sciences Commons^™

Aglec Advisory Council Meeting, John Owens

John Owens: Speeches and Appearances

Thank you for inviting me to be with you today to discuss one of my favorite topics - education and the terrifically talented young people who come to study with us in the College of Agricultural Sciences and Natural Resources, or CASNR, in the Institute of Agriculture and Natural Resources here at the University of Nebraska-Lincoln.

Nebraska Hall Of Agricultural Achievement Dinner, John Owens

John Owens: Speeches and Appearances

It is my pleasure to be with you tonight celebrating the accomplishments of these wonderful and worthy new additions to the Nebraska Hall of Agricultural Achievement. I'm delighted to have this opportunity to help recognize these individuals so deserving of their honors. What a pleasure to say, “well done and thank you” to people who make such significant contributions to the world, who live their lives meaningfully in the way they choose to put their talents and energies to work.

48th Annual Nebraska Agri-Business Association Meeting, John Owens

John Owens: Speeches and Appearances

Thank you so very much for this opportunity to speak today at this 48th Annual Nebraska Agri-Business Association meeting. Dr. Kyle Hoagland, Water Center Director in the Institute of Agriculture and Natural Resources at the University of Nebraska-Lincoln, and I are particularly pleased to be asked to talk with you today about water, a key concern in our state and in our world. New water regulations affecting Nebraska's agricultural producers, numerous legislative discussions, and stories of neighbors contesting water use by neighbors have been in the news and on our minds. We all know that will continue.

Nebraska Agribusiness Club 40th Annual Awards Banquet, John Owens

John Owens: Speeches and Appearances

Did you know if you look up the word "integrity" in the dictionary, the definition is Alan Moeller?

Abn Summer Meeting, John Owens

John Owens: Speeches and Appearances

It is such a pleasure to have you on campus with us today. While we couldn't do anything to turn the heat down outside, at least we've had some hot topics to go right along with it! I sincerely hope you've enjoyed the wide variety of information we've shared with you today. It is our pleasure to have this opportunity to host you here on campus, and I thank everyone who has been part of presenting and putting this day's program together. I also thank each of you, and every member of ABN, for all you do in support of …

Casnr Salute To Graduates, John Owens

John Owens: Speeches and Appearances

We appreciate your being with us this afternoon as we celebrate, the accomplishments of tomorrow's graduates from the University of Nebraska-Lincoln. Thank you for attending and, congratulations to the new alumni! This ceremony is rapidly becoming both a fixture and a tradition in the College of Agricultural Sciences and Natural Resources. As a matter of fact, it took the national "First Place Award" in a competition this year that was open to all the universities in the United States.

In Memorium: Lynn Ann Hertel, Donald Duszynski, Eric S. Loker

Harold W. Manter Laboratory of Parasitology: Faculty Publications

A memorial tribute to Lynn Ann Hertel (1951-2005) of the University of New Mexico, by Donald W. Duszynski and Eric S. Loker.

Nebraska Urban Pest Management Conference, John Owens

John Owens: Speeches and Appearances

It is my very great pleasure to welcome each of you to the 14th annual Urban Pest Management Conference. I want you to know that we in the Institute of Agriculture and Natural Resources take seriously our role as partners with Nebraska. We are especially pleased for the partnerships we have with your industry.

Omtvedt Innovation Award Presented To Marilyn Fox, John Owens

John Owens: Speeches and Appearances

It is such a pleasure to honor innovation and strength in the Institute of Agriculture and Natural Resources today through this 2006 Omtvedt Innovation Award. This award is made possible because of the generosity of Leone and the late Neal Harlan, great friends of the Institute of Agriculture and Natural Resources. The Harlans had the vision and the foresight to realize the importance of recognizing and supporting outstanding and innovative work in the Institute, and honored Irv Omtvedt on his retirement as Vice Chancellor of the Institute with a generous gift of funds to support the Omtvedt Innovation Awards. These …

Water Conference, John Owens

John Owens: Speeches and Appearances

We've all heard Mark Twain's old adage: "Whiskey is for drinking; water is for fighting over." Twain penned those words in 1884, and while I won't touch his commentary on whiskey, his comment on water remains on target today.

Intestinal Mucosal Alterations In Rats With Carbon Tetrachloride-Induced Cirrhosis: Changes In Glycosylation And Luminal Bacteria, Sathish Kumar Natarajan, Prabhu Ramamoorthy, Simmy Thomas, Jayasree Basivireddy, Gagandeep Kang, Anup Ramachandran, Anna B. Pulimood, K. A. Balasubramanian

Department of Nutrition and Health Sciences: Faculty Publications

Spontaneous bacterial peritonitis is a major cause of mortality after liver cirrhosis. Altered permeability of the mucosa and deficiencies in host immune defenses through bacterial translocation from the intestine due to intestinal bacterial overgrowth have been implicated in the development of this complication. Molecular mechanisms underlying the process are not well known. In order to understand mechanisms involved in translocation of bacteria, this study explored the role of oxidative stress in mediating changes in intestinal mucosal glycosylation and luminal bacterial content during cirrhosis. CCl₄-induced cirrhosis in rats led to prolonged oxidative stress in the intestine, accompanied by increased …

Regents Outreach And Economic Development Task Force Meeting, John Owens

John Owens: Speeches and Appearances

Let me begin today by thanking you, Regent Hassebrook, as Task Force Chair, and each of you who is a member of this Task Force, for focusing on outreach and economic development at the University as we work on behalf of Nebraska. We thank Regent Chair Howard Hawks for appointing this task force. The level of commitment this shows for the university's role in outreach and economic development is very important both to us in the university and to Nebraskans.

Casnr Salute To Graduates, John Owens

John Owens: Speeches and Appearances

We appreciate your being with us as we celebrate the accomplishments of tomorrow’s graduates from the University of Nebraska – Lincoln. Thank you for attending. This ceremony is rapidly becoming both a fixture and a tradition in the College of Agricultural Sciences and Natural Resources.

2006 Master Conservationist Presentations, John Owens

John Owens: Speeches and Appearances

Kirk and William Laux (locks) of Bridgeport in the Panhandle will receive the first Master Conservationist recognition in Production Agriculture. Will Kirk and William please come forward? This family limited partnership includes 5,000 acres of rangeland, 160 acres of dryland, 1200 acres of irrigated land, a cow-calf operation, and a feedlot. They began farming in the 1960s and later purchased several "tired" eroded units. These units were improved by “applying" erosion control practices including seeding, cross-fencing, and improved watering.

Seven New Species Of Eimeria Schneider, 1875 (Apicomplexa: Eimeriidae) From Colubrid Snakes Of Guatemala And A Discussion Of What To Call Ellipsoid Tetrasporocystic, Dizoic Coccidia Of Reptiles, I. M. Asmundsson, Donald W. Duszynski, J. A. Campbell

Harold W. Manter Laboratory of Parasitology: Faculty Publications

During a survey of Guatemalan herpetofauna in the summers of 1998–2000, 29 presumed new species of Eimeria Schneider, 1875 were found, seven of which have a distinct elongate-ellipsoidal shape (L/W ratio ≥ 1.7) and are described herein. Six of the seven new species are similar in oöcyst length, width and L/W ratio and sporocyst length, width and L/W ratio, lack a micropyle, oöcyst residuum, Stieda body, sub- and parastieda bodies, have a polar granule and sporocyst residuum, and their sporocysts appear to have dehiscence sutures. The seventh is slightly smaller and has sporocysts with a Stieda body. The new species …

A New Species Of Neohaematotrephus (Digenea: Echinostomiformes: Cyclocoelidae) In The Spotted-Sandpiper Actitis Macularia (Charadriiformes: Scolopacidae) From Venezuela, David Zamparo, Daniel R. Brooks

Harold W. Manter Laboratory of Parasitology: Faculty Publications

Fischthal and Nasir (1974) reported Neohaematotrephus brasilianum (as Cyclocoelum brasilianum) in the spotted sandpiper Actitis macularia from Venezuela. Three voucher specimens from that report, deposited in the United States National Parasite Collection, however, differ from N. brasilianum by having the cirrus sac on the sinistral side of the body, which resembles N. facioi, N. arayae, and N. gendrei. The new species is similar to N. brasilianum by having vitelline follicles extending well anterior to the intestinal bifurcation and by having a short and laterally displaced cirrus sac whose posterior end does not reach the intestinal bifurcation, …

First Report Of Mites And Fleas Associated With Sigmodontine Rodents From Corrientes Province, Argentina, Marcela Lareschi, Donald Gettinger, Santiago Nava, Agustín Abba, Mariano L. Merino

Harold W. Manter Laboratory of Parasitology: Faculty Publications

Fleas (Insecta: Siphonaptera) and mesostigmate mites (Acari: Laelapidae) are common ectoparasitic associates of sigmodontine rodents in the Neotropics of South America. In Argentina, most of the research on ectoparasitic arthropods has been carried out on rodents from Buenos Aires Province (Autino and Lareschi, 1998; Lareschi and Mauri, 1998), while only a few small studies have been done in other areas of the country, such as the northwest (Lareschi et al., 2003a), and the Monte Desert Biome in Mendoza Province (Lareschi et al., 2004). Unfortunately, very little information is available from the region between the Paraná and Uruguay rivers in northeastern …

Redescription Of Cryptocotyle Thapari Mcintosh, 1953 (Trematoda: Heterophyidae), In The River Otter Lutra Longicaudis From Bolivia, Scott Lyell Gardner, Peter T. Thew

Harold W. Manter Laboratory of Parasitology: Faculty Publications

Cryptocotyle thapari McIntosh, 1953 (Digenea: Heterophyidae), collected originally from a South American otter that died at the U.S. National Zoo in Washington, D.C., is redescribed from specimens obtained from a river otter, Lutra longicaudis, collected from the Rı´o Matos in the Departamento de Beni, Bolivia. These individuals of C. thapari are slightly smaller than the type specimens, but they have similar features, including testes arranged in tandem and a well-defined ventrogenital sac. We redescribe this species because the original description was based on only 3 individuals, and the figures lacked detail. This is the first record of Cryptocotyle from …

Sl1 Rna Gene Recovery From Enterobius Vermicularis Ancient Dna In Pre-Columbian Human Coprolites, Alena M. Iñiguez, Karl Reinhard, Marcelo Luiz Carvalho Gonçalves, Luiz Fernando Ferreira, Adauto Araújo, Ana Carolina Paulo Vincente

Karl Reinhard Publications

Enterobius vermicularis, pinworm, is one of the most common helminths worldwide, infecting nearly a billion people at all socio-economic levels. In prehistoric populations the paleoparasitological findings show a pinworm homogeneous distribution among hunter-gatherers in North America, intensified with the advent of agriculture. This same increase also occurred in the transition from nomad hunter-gatherers to sedentary farmers in South America, although E. vermicularis infection encompasses only the ancient Andean peoples, with no record among the pre-Colombian populations in the South American lowlands. However, the outline of pinworm paleo epidemiology has been supported by microscopic finding of eggs recovered from coprolites. …

Psettarium Anthicum Sp. N. (Digenea: Sanguinicolidae) From The Heart Of Cobia Rachycentron Canadum (Rachycentridae) In The Northern Gulf Of Mexico, Stephen A. Bullard, Robin M. Overstreet

Harold W. Manter Laboratory of Parasitology: Faculty Publications

Psettarium anthicum sp. n. (Digenea: Sanguinicolidae) infects the myocardium and atrial wall of the cobia Rachycentron canadum (Linnaeus, 1766) (Rachycentridae) in the northern Gulf of Mexico off Mississippi, USA. It is the first member of Psettarium Goto et Ozaki, 1930 reported from other than the Indian Ocean or Pacific Ocean and the second species of the genus reported from cobia. It differs from its congeners by the combination of having posterior caeca with lateral projections appearing as thorns in lateral view and the male pore anterior to the oötype. The species of Psettarium, P. japonicum (Goto et Ozaki, 1929) …

A Review Of Polylekithum Arnold 1934 And Its Familial Affinities Using Morphological And Molecular Data, With Description Of Polylekithum Catahoulensis Sp. Nov., Stephen S. Curran, Vasyl V. Tkach, Robin M. Overstreet

Harold W. Manter Laboratory of Parasitology: Faculty Publications

The type material of Polylekithum ictaluri, P. halli, and Maculifer chandleri was examined from the United States National Parasite Museum, and we determined that the material was conspecific, making P. halli and M. chandleri junior subjective synonyms of P. ictaluri. Polylekithum catahoulensis sp. nov. was described from material collected from catfishes at the Catahoula Wildlife Refuge, LaSalle Parish, Louisiana, USA, and compared with P. ictaluri collected from catfishes in Reelfoot Lake, Obion County, Tennessee, USA, and the Pearl River, Hancock County, Mississippi, USA. Polylekithum catahoulensis had smaller eggs (77-–88 μm long by 51–-63 µm wide vs. 94–-108 …

Why Is The Number Of Dna Bases 4?, Bo Deng

Department of Mathematics: Faculty Publications

In this paper we construct a mathematical model for DNA replication based on Shannon’s mathematical theory for communication. We treatDNAreplication as a communication channel. We show that the mean replication rate is maximal with four nucleotide bases under the primary assumption that the pairing time of the G–C bases is between 1.65 and 3 times the pairing time of the A–T bases.

Myxozoan Genera: Definition And Notes On Taxonomy, Life-Cycle Terminology And Pathogenic Species, Jiří Lom, Iva Dyková

Harold W. Manter Laboratory of Parasitology: Library Materials

A list of myxozoan genera is presented in the current taxonomical scheme. These genera are defined; their type species and most important pathogens along with their hosts are listed. Simultaneously, definitions of actinospore stages representing sexual stages of the myxosporean life cycle are given; altogether, 17 actinospore collective groups with 180 types have been described. Life cycles of the two classes of the phylum Myxozoa, Malacosporea and Myxosporea, are briefly outlined with specification of the appropriate terms. Up to now, 4 malacosporean and 2,180 myxosporean species assigned to a total of 62 genera, have been established. The surviving classification of …

Phylogenetic Analysis Of The Scarab Family Hybosoridae And Monographic Revision Of The New World Subfamily Anaidinae (Coleoptera: Scarabaeoidea), Federico C. Ocampo

Bulletin of the University of Nebraska State Museum (1924–2023)

1. Introduction to the Scarab Family Hybosoridae (Coleoptera: Scarabaeoidea). Federico C. Ocampo.

2. Molecular Phylogenetics and Systematic Placement of the Family Hybosoridae (Coleoptera: Scarabaeoidea). Federico C. Ocampo and David C. Hawks.

3. Phylogenetic Analysis of the Subfamily Anaidinae (Coleoptera: Scarabaeoidea). Federico C. Ocampo.

4. Catalog of the Subfamilies Anaidinae, Ceratocanthinae, Hybosorinae, Liparochrinae, and Pachyplectrinae (Scarabaeoidea: Hybosoridae). Federico C. Ocampo and Alberto Ballerio.

Abstract. Phylogenetic analyses and taxonomic revisions were conducted on the scarabaeoid family Hybosoridae. Two new subfamilies of Hybosoridae are described, Liparochrinae and Pachyplectrinae. Phylogenetic analysis and a systematic revision of the New World subfamily Anaidinae are provided. The …

Relative Index Of Susceptibility To The Maize Weevil, Sitophilus Zeamais, Among Some Qpm Corn Lines, Jamilton P. Santos, Paulo E. O. Guimaraes, Jose M. Waquil, John E. Foster

Department of Entomology: Faculty Publications

The maize weevil, Sitophilus zeamais, is one important pest of stored corn grain. It is difficult to control and causes large weight and nutritional losses to the grains. The discovery of the gene Opaque-2 (O-2) that enhances the protein quality with Lysine and Tryptophane opened new perspectives to use corn to feed monogastric animals and for human nutrition. However, the soft and farinaceous consistency of the endosperm in the O-2 gene corn increased the susceptibility to maize weevil. To solve this problem the O-2 gene was transferred to normal corn. This new corn was called Quality Protein Maize (QPM). …

Prairie Suite: A Celebration, Twyla Hansen, Paul A. Johnsgard

Paul Johnsgard Collection

25 poems by Twyla Hansen, with illustrations by Paul A. Johnsgard, including:

Walk on the Prairie

There is mystery here, in the shapes of grass,
in the dim movements of an inland sea,
connections to an earlier time. Wander barefoot,
hypothesize the dance of millennia, the unbearable
carvings of the built environment, this ragtag escape.

Let its divine simplicity ooze into your pores.
Comb the steel from your hair, blanket your
tongue with orange. Your breathing will slow.
Breathing slow, unbutton the child within.
Give her permission to go fly a kite.

Paired-End Sequence Mapping Detects Extensive Genomic Rearrangement And Translocation During Divergence Of Francisella Tularensis Subsp. Tularensis And Francisella Tularensis Subsp. Holarctica Populations, Michael P. Dempsey, Joseph Nietfeldt, Jaques Ravel, Steven H. Hinrichs, Robert Crawford, Andrew K. Benson

Department of Food Science and Technology: Faculty Publications

Comparative genome hybridization of the Francisella tularensis subsp. tularensis and F. tularensis subsp. holarctica populations have shown that genome content is highly conserved, with relatively few genes in the F. tularensis subsp. tularensis genome being absent in other F. tularensis subspecies. To determine if organization of the genome differs between global populations of F. tularensis subsp. tularensis and F. tularensis subsp. holarctica, we have used paired-end sequence mapping (PESM) to identify regions of the genome where synteny is broken. The PESM approach compares the physical distances between paired-end sequencing reads of a library of a wild-type reference F. tularensis …

Loss Of Escape-Related Giant Neurons In A Spiny Lobster, Panulirus Argus, Sandra Y. Espinoza, Lana Breen, Nisha Varghese, Zen Faulkes

School of Integrative Biological & Chemical Sciences (Formerly Dept. of Biology)

When attacked, many decapod crustaceans perform tailflips, which are triggered by a neural circuit that includes lateral giant interneurons, medial giant interneurons, and fast flexor motor giant neurons (MoGs). Slipper lobsters (Scyllaridae) lack these giant neurons, and it has been hypothesized that behavioral (e.g., digging) and morphological (e.g., flattening and armor) specializations in this group caused the loss of escape-related giant neurons. To test this hypothesis, we examined a species of spiny lobster, Panulirus argus. Spiny lobsters belong to the sister taxon of the scyllarids, but they have a more crayfish-like morphology than scyllarids and were predicted to have escape-related …

Digging Mechanisms And Substrate Preferences Of Shovel Nosed Lobsters, Ibacus Peronii (Decapoda: Scyllaridae), Zen Faulkes

School of Integrative Biological & Chemical Sciences (Formerly Dept. of Biology)

Digging is a distinct form of locomotion that poses different mechanical problems than other locomotor modes that are commonly used by crustaceans, e.g., walking, swimming. I examined the mechanisms of digging by shovel nosed lobsters (Ibacus peronii), which spend most of the day underneath sand. Ibacus peronii were videotaped while digging. Ibacus peronii use a “wedge” strategy to submerge into sand. An individual penetrates the sand with the walking legs, then extends the abdomen to push sand backwards, then flexes the abdomen while pushing backward with the legs, which slowly drives the body into the sand. This basic …

Cultivation Of Methanogens From Shallow Marine Sediments At Hydrate Ridge, Orego, Melissa Kendall, David R. Boone

Biology Faculty Publications and Presentations

Little is known about the methanogenic degradation of acetate, the fate of molecular hydrogen and formate or the ability of methanogens to grow and produce methane in cold, anoxic marine sediments. The microbes that produce methane were examined in permanently cold, anoxic marine sediments at Hydrate Ridge (44°35' N, 125°10' W, depth 800 m). Sediment samples (15 to 35 cm deep) were collected from areas of active methane ebullition or areas where methane hydrates occurred. The samples were diluted into enrichment medium with formate, acetate or trimethylamine as catabolic substrate. After 2 years of incubation at 4 °C to 15 …