Life Sciences Commons^™

Histological Pattern Of Ovarian Neoplasma., Zubair Ahmad, Naila Kayani, Sheema H. Hasan, Suhail Muzaffar, Muhammad Shafiq Gill

Department of Pathology and Laboratory Medicine

Abstract

Objective: To see the morphological pattern of benign and malignant ovarian neoplasms. Method: Retrospective study of all consecutive cases of ovarian neoplasms diagnosed at Aga Khan University Hospital between 1st January 1993 and 30th September 1998. Setting: The Section of Histopathology, AKUH, Karachi. Observation: Of 855 ovarian tumours 506 (59.18%) were benign and 349(40.81%) malignant. Surface epithelial - stromal tumours comprised 63.50% of all tumours. Benign cystic teratoma was the commonest benign tumour (35.17% of all benign tumours) and serous cystadenocarcinoma was the commonest malignant tumour (33.33% of all malignant tumours). Mucinous cystadenocarcinomas are more common in our population …

A Gene Expression Screen Identifies Earli1 As A Novel Vernalization-Responsive Gene In Arabidopsis Thaliana, Richard K. Wilkosz, Michael Schläppi

Biological Sciences Faculty Research and Publications

Vernalization promotes early flowering in late ecotypes of Arabidopsis thaliana. The mechanisms of vernalization are poorly understood. A subtractive hybridization approach was used to isolate vernalization-responsive genes from a late-flowering ecotype of Arabidopsis thaliana based on the premise that transcript levels of such genes would increase with cold treatment and remain high even after removal of the vernalization stimulus. EARLI1 is the first Arabidopsis gene shown to be stably activated by vernalization. The abundance of its RNA is progressively elevated by vernalization and remains high for at least 20 days at room temperature. The basal level of EARLI1 RNA …

Modeling Of A Meat Cooking Process For On-Line Monitoring And Control, Oralia Garcia

Theses and Dissertations - UTB/UTPA

A heat transfer model is developed to predict cooking time of meat patties given the initial temperature of meat, oven temperature, and meat properties to monitor and control a cooking process on-line. Experiments were performed to find the cause of variability in cooked weight and raw temperature effects in forming and final cooked temperature. Advanced charting techniques concluded that only common causes of variability were present in the process. Thermal conductivity experiments were performed to determine the thermal conductivity of meat (k), which was compared with the properties of meat published in literature to validate the experiment. Oven design analysis …

Comparative Phenology Of Acacia Berlandieri, A. Minuata, A. Rigidula, A. Schaffneri, And Chloroleucon Ebano In The Lower Rio Grande Valley Of Texas, Melissa R. Eddy

Theses and Dissertations - UTB/UTPA

A phenological study of Acacia berlandieri, A. minuata, A. rigidula, A. schaffneri, and Chloroleucon ebano was conducted at three sites in the lower Rio Grande Valley of Texas from July 1998 to August 1999. Flowering in Acacia species occurred between January and April 1999, and was influenced by precipitation only in A. minuata . The timing of flowering appears to be influenced by the amount of time needed for fruit maturation. Precipitation, photoperiod, and temperature influenced the timing of fruiting in all species except A. berlandieri . Shoot elongation and leaf maturation in Acacia species were positively correlated with …

‘Strawberry Festival’ Strawberry, C. K. Chandler, D. E. Legard, David Dunigan, T. E. Crocker, C. A. Sims

Department of Plant Pathology: Faculty Publications

Most of the strawberries (Fragaria xananassa Duchesne) produced in Florida are shipped fresh to locations throughout the eastern United States and Canada (Florida Agricultural Statistics [www.nass.usda.gov/ fl]). Therefore, Florida growers need cultivars that produce fruit that are attractive and flavorful, and maintain these qualities during and after long-distance shipment. 'Strawberry Festival' strawberry has produced commercially acceptable yields of firm, attractive, and flavorful fruit in trials at the Univ. of Florida's Gulf Coast Research and Education Center in Dover (GCREC-Dover) and in two commercial fields in west central Florida. It is recommended for trial in areas where strawberries are grown …

Characterization Of Transcripts Expressed From Human Herpesvirus 6a Strain Gs Immediate-Early Region B U16-U17 Open Reading Frames, Linda Flebbe-Rehwaldt, Charles Wood, Bala Chandran

Nebraska Center for Virology: Faculty Publications

Several gene fragments of human herpesvirus 6 (HHV-6) have been shown to activate the human immunodeficiency virus (HIV) type 1 long terminal repeat (LTR). An open reading frame (ORF) designated B701 (Y. Geng, B. Chandran, S. F. Josephs, and C. Wood, J. Virol. 66:1564–1570, 1992), found within a 22-kb HHV-6A strain GS [HHV-6A(GS)] genomic fragment and a 3.8-kb SalI subfragment, was shown to activate the HIV LTR. B701, also known as HHV-6 U16, is located in the immediate-early B (IE-B) region of the genome. The sequence of the 3.8-kb genomic fragment of HHV-6A(GS) is nearly identical to the published …

Ecogeographic Aspects Of Greater Prairie-Chicken Leks In Southeastern Nebraska, Paul A. Johnsgard

Nebraska Bird Review

An analysis of the distribution of 104 Greater Prairie-chicken leks in Pawnee and Johnson counties indicates that the birds favor using those mile-square sections having no more than two dwellings per section, ones that are located at least two miles from the nearest town, and at least a half-mile from the nearest lek. Relationships with the nearest water were not clear, but most leks were located at least a half-mile from it, perhaps reflecting a general avoidance of heavy cover during the display season.

Phylogenetic Relationships Among Species Of Stilestrongylus Freitas, Lent And Almeida, 1937 (Trichostrongyloidea: Heligmonellidae: Nippostrongylinae), Parasites Of Myomorph Rodents (Rodentia: Muridae) In The Neotropics, Gerardo Perez-Ponce De Leon, Scott Lyell Gardner, Jorge Falcon-Ordaz

Harold W. Manter Laboratory of Parasitology: Faculty Publications

The phylogenetic relationships of 14 species of Stilestrongylus were analyzed using the comparative morphology of 21 characters. We obtained 2 shortest trees of 50 steps, with a consistency index of 0.540 and 25 apomorphic character states. Ingroup monophyly was supported on these trees by 2 and 3 synapomorphies, respectively, and the ingroup was defined by the following characters: greater number of ventral ridges relative to the number of ridges dorsally, asymmetric bursa, and externodorsal rays differing in size. Sister-group relationships among Stilestrongylus and the other genera designated as outgroups are relatively consistent with those postulated by Durette-Desset’s in a classification …

Observations On Small Mammals Recovered From Owl Pellets From Nebraska, Jeffrey J. Huebschman, Hugh H. Genoways, Patricia W. Freeman, Joseph A. Gubanyi

University of Nebraska State Museum: Mammalogy Papers

Mammalian remains from owl pellet material collected in 24 Nebraska counties were examined. A total of 1262 individual mammals was identified from all owl pellet material and included 19 identifiable species and 21 total genera. The most commonly consumed prey by owls across the state were Microtus (41% of identifiable prey material), followed by Peromyscus (18%), and Reithrodontomys (11%). Significant locality information for the northern grasshopper mouse (Onychomys leucogaster), the southern bog lemming (Synaptomys cooperi), and the meadow vole (Microtus pennsylvanicus) are reported.

Role Of ΣB In Adaptation Of Listeria Monocytogenes To Growth At Low Temperature, Lynne A. Becker, Stefanie N. Evans, Robert W. Hutkins, Andrew K. Benson

Department of Food Science and Technology: Faculty Publications

The activity of σ^B in Listeria monocytogenes is stimulated by high osmolarity and is necessary for efficient uptake of osmoprotectants. Here we demonstrate that, during cold shock, σ^B contributes to adaptation in a growth phase-dependent manner and is necessary for efficient accumulation of betaine and carnitine as cryoprotectants.

Some New Records Of Hymenopterous Parasitoids For Florida, Gregory A. Evans

Insecta Mundi

Abstract:
FAMILY APHELINIDAE
FAMILY APHIDIIDAE
FAMILY CHARIPIDAE
FAMILY ENCYRTIDAE
FAMILY EULOPHIDAE
FAMILY PLATYGASTERIDAE
FAMILY TRICHOGRAMMATIDAE
FAMILY TORYMIDAE

Tetrops Praeusta (L.) (Coleoptera: Cerambycidae), A Potential Pest?, Henry Howden, Anne Howden

Insecta Mundi

Thanks to Richard G. Dearborn we were able to examine the collection of beetles of the Maine Forest Service, Department of Conservation, Augusta. Our attention was directed to two small (4-6 mm) cerambycids by their collector, Kimberly Foss. The specimens are cylindrical, black bodied with tan, black tipped, setose elytra and tan legs. One specimen had been taken sitting on a maple leaf at Portland, Maine, and the other was collected by sweeping at Augusta, Maine. Subsequently an additional two specimens were collected in our Malaise trap on the Dearborn property 10 mi. S. Mt. Vernon, Maine.

Observations On The Biology Of The Antlion Genus Glenurus Hagen (Neuroptera: Myrmeleontidae), Lionel A. Stange

Insecta Mundi

This New World genus contains nine described species classified in the Nemoleontini. Larvae have been found for five species (Miller and Stange, unpublished data). The larvae have only two mandibular teeth and the labial palpus has only 2 segments. These characters are unknown in other genera of the Nemoleontini. Larvae live in dry tree holes (Miller, R. and L. A. Stange, 1983, Description and biology of Acrolophus pholeter, (Lepidoptera: Tineidae), a new moth commensal from Gopher Tortoise burrows in Florida. Proceedings of the Entomological Society of Washington 90:164-178.), in litter under rocks or under tree roots, or (G. gratus) …

A Preliminary List Of Neuroptera From The Great Smoky Mountains National Park, Lionel A. Stange

Insecta Mundi

The following species of Neuroptera have been identified from the Great Smoky Mountains National Park. The names are provided as part of the All Taxa Biodiversity Inventory of the park (ATBI). The material was studied in 2000 at the Natural History Museum at Sugarlands Headquarters (GRSM). Additional material was obtained from two Malaise traps run for over a year (1999-2000) at the Twin Creeks Science Center and specimens obtained by the author during the first week of September, 2000. Nearly all of the specimens were collected at relatively low altitudes (Cosby; Elkmont; Twin Creeks; Sugarland Visitor Center) from April to …

Annotated Checklist Of The Millipeds Of Florida (Arthropoda: Diplopoda), Rowland M. Shelley

Insecta Mundi

The milliped fauna of Florida consists of 8 orders, 18 families, 34 genera, and 51 species and subspecies; it comprises six elements: widespread species occurring widely in Florida, northern species reaching their southern limits in north Florida, neotropical species occurring naturally in Florida or adventive there, oriental adventives, Florida endemics, and southeastern endemics. A complete listing of these taxa is provided, with published and new records from the state, synonyms, and type localities. Georgiulus paynei Hoffman, Cleidogona alata Causey, and Pseudopolydesmus serratus (Say) are newly recorded from the state, and Eurymerodesmus serratus Shelley is deleted; Pseudojulus obtectus (Bollman) is recorded …

New Records For Tephritidae (Diptera) In Great Smoky Mountains National Park, G. J. Steck, Bruce D. Sutton

Insecta Mundi

As part of the All Taxon Biological Inventory (ATBI) being conducted in the Great Smoky Mountains National Park (GSMNP), we report the following new distribution and host plant records. The authors collected and identified all specimens except as noted below. Comments regarding previous known distributions and hosts are taken from Foote et al. (1993).

The Vascular Flora Of Prentice Cooper State Forest And Wildlife Management Area, Tennessee, John Trevor Beck

Masters Theses and Doctoral Dissertations

The vascular plants of Tennessee's Prentice Cooper State Forest and Wildlife Management Area were gathered from 112 collection trips made during the growing seasons of 1998 and 1999. Prentice Cooper has an interesting and a rich flora. I collected 2,313 specimens and examined 110 herbarium specimens. The flora is comprised of 139 families, 512 genera, and 1,038 species and lesser taxa. The four largest families are Asteraceae (128 species-12% of the flora), Poaceae (106 species-10%), Cyperaceae (64 species-6%), and Fabaceae (57 species-5%). These four families represent approximately 34% of the total flora. Numerous county extensions, as well as rare, threatened, …

Role Of Dopamine D4 Receptor In The Genomic And Behavioral Effects Of Psychostimulants: Relevance To Schizophrenia, Bina Garimella

Masters Theses

The role of dopamine D4 receptors in the induction and expression of behavioral sensitization to amphetamine, cocaine and PCP was investigated in this study. Behavioral changes and genomic responses accompanying sensitization were examined using a highly selective D4 receptor antagonist, PNU-101387G. Induction and expression of behavioral sensitization to cocaine was blocked by PNU-101387G. However, the D4 antagonist did not modulate the induction and expression of behavioral sensitization to PCP. Neuroadaptive genomic responses accompanying acute and chronic effects of amphetamine and their modulation by PNU-101387G was examined by looking at alterations in the expression of two immediate-early genes: c-fos and NGFI-A. …

Potential Cost Of Agricultural Water For Meeting In-Stream Flow Demands, Raymond J. Supalla

Cornhusker Economics

In 1997 the states of Colorado, Nebraska and Wyoming signed a Cooperative Agreement (CA) which called for making 130,000 to 150,000 acre feet of additional water available for meeting endangered species needs along the Big Bend Reach of the Platte River. Three projects, one in each state, will contribute 70,000 acre feet towards this goal. The remaining 60,000 to 80,000 acre feet must be acquired thorough other means, the most likely being the purchase or leasing of rights to what is now irrigation water. If the CA is eventually implemented, all purchases and leases of irrigation water will be negotiated …

A Comparison Study Of Astm-Ifa (Icr) Method, The Pronetic Method And Dynal Method For Detection And Enumeration Of Giardia And Cryptosproidium In Source Waters In Kentucky, Lisa Curtis Hawkins

Morehead State Theses and Dissertations

A thesis presented to the faculty of the College of Science and Technology at Morehead State University in partial fulfillment of the requirements for the Degree of Master of Science in Biology by Lisa Curtis Hawkins on November 28, 2000.

Hybridization Of Dna By Sequential Immobilization Of Oligonucleotides At The Air-Water Interface, Murali Sastry, Vidya Ramakrishnan, Mrunalini Pattarkine, Anand Gole, K. N. Ganesh

Faculty Works

The hybridization of DNA by sequential electrostatic and hydrogen-bonding immobilization of single-stranded complementary oligonucleotides at the air-water interface with cationic Langmuir monolayers is demonstrated. The complexation of the single-stranded DNA molecules with octadecylamine (ODA) Langmuir monolayers was followed in time by monitoring the pressure-area isotherms. A large (and slow) expansion of the ODA monolayer was observed during each stage of complexation in the following sequence: primary single-stranded DNA followed by complementary single-stranded DNA followed by the intercalator, ethidium bromide. Langmuir-Blodgett (LB) films of the ODA-DNA complex were formed on different substrates and characterized using quartz-crystal microgravimetry (QCM), Fourier transform infrared …

Somite Development In Zebrafish, Heather L. Stickney, Michael J.F. Barresi, Stephen H. Devoto

Biological Sciences: Faculty Publications

A full understanding of somite development requires knowledge of the molecular genetic pathways for cell determination as well as the cellular behaviors that underlie segmentation, somite epithelialization, and somite patterning. The zebrafish has long been recognized as an ideal organism for cellular and histological studies of somite patterning. In recent years, genetics has proven to be a very powerful complementary approach to these embryological studies, as genetic screens for zebrafish mutants defective in somitogenesis have identified over 50 genes that are necessary for normal somite development. Zebrafish is thus an ideal system in which to analyze the role of specific …

Projecting Cash Needs And Production Costs, Roger Selley

Cornhusker Economics

Some producers suggest they prepare a cash flow if needed for their lender, but otherwise find the projection too dependent upon unknowns to be useful. Earlier newsletters have suggested using projected cash flow commitments to determine the level of crop insurance coverage. Much of the information required to prepare a cash flow projection can also be used to prepare a projected return over variable costs (gross margin) for individual enterprises. Gross margins can be used to project, for example, which crops will be most profitable.

H-Ns Controls Pap And Daa Fimbrial Transcription In Escherichia Coli In Response To Multiple Environmental Cues, C. A. White-Ziegler, A. Villapakkam, K. Ronaszeki, S. Young

Biological Sciences: Faculty Publications

A comparative study was completed to determine the influence of various environmental stimuli on the transcription of three different fimbrial operons in Escherichia coli and to determine the role of the histone-like protein H-NS in this environmental regulation. The fimbrial operons studied included the pap operon, which encodes pyelonephritis-associated pili (P pili), the daa operon, which encodes F1845 fimbriae, and the fan operon, which encodes K99 fimbriae. Using lacZYA transcriptional fusions within each of the fimbrial operons, we tested temperature, osmolarity, carbon source, rich medium, oxygen levels, pH, amino acids, solid medium, and iron concentration for their effects on fimbrial …

Transgene And Transposon Silencing In Chlamydomonas Reinhardtii By A Deah-Box Rna Helicase, Dancia Wu-Scharf, Byeong-Ryool Jeong, Chaomei Zhang, Heriberto D. Cerutti

Center for Plant Science Innovation: Faculty Publications

The molecular mechanism(s) responsible for posttranscriptional gene silencing and RNA interference remain poorly understood. We have cloned a gene (Mut6) from the unicellular green alga Chlamydomonas reinhardtii that is required for the silencing of a transgene and two transposon families. Mut6 encodes a protein that is highly homologous to RNA helicases of the DEAH-box family. This protein is necessary for the degradation of certain aberrant RNAs, such as improperly processed transcripts, which are often produced by transposons and some transgenes.

Structure-Expression Relationships Of The 15-Kda Selenoprotein Gene, Easwari Kumaraswamy, Andrey Malyhk, Konstantin V. Korotkov, Sergei Kozyavkin, Yajun Hu, Byeong J. Lee, Dolph L. Hatfield, Alan M. Diamond, Vadim N. Gladyshev

Vadim Gladyshev Publications

Selenium has been implicated in cancer prevention, but the mechanism and possible involvement of selenoproteins in this process are not understood. To elucidate whether the 15-kDa selenoprotein may play a role in cancer etiology, the complete sequence of the human 15-kDa protein gene was determined, and various characteristics associated with expression of the protein were examined in normal and malignant cells and tissues. The 51-kilobase pair gene for the 15-kDa selenoprotein consisted of five exons and four introns and was localized on chromosome 1p31, a genetic locus commonly mutated or deleted in human cancers. Two stemloop structures resembling selenocysteine insertion …

Expression And Action Of Neurotropin-3 And Nerve Growth Factor In Embryonic And Early Postnatal Rat Testis Development, Andrea S. Cupp, Grace H. Kim, Michael K. Skinner

Department of Animal Science: Faculty Publications

The current study examines the expression and potential actions of neurotropin-3 (NT3), nerve growth factor (NGF), and their receptors during morphological sex determination (seminiferous cord formation) and perinatal rat testis development. The expression of neurotropins and their receptors was analyzed with immunohistochemistry. Cellular localization of neurotropin ligand and receptor proteins changed during embryonic testis development. Neurotropin-3 was localized to Sertoli cells at Embryonic Day 14 (E14), was present in gonocytes at Postnatal Day 0 (P0), and after birth became localized to the interstitium and Sertoli cells (P3–P5). The expression of trk C (the high affinity receptor for NT3) was localized …

Value-Added And The Declining Farm Share Of Consumer Expenditures For Food, Jeffrey S. Royer

Cornhusker Economics

The farm share of consumer expenditures for food has fallen substantially over the past five decades. As shown in Figure 1, consumer expenditures for domestically produced farm foods increased from $50.9 billion in 1952 to $618.4 billion in 1999. The farm value of these foods increased from $20.4 billion to $120.5 billion during the same period, representing a decline in the farm share from 40 percent to 20 percent.

Bright Lights, Big City, Dead Birds

Fatal Light Awareness Program (FLAP)

Hundreds of species of birds migrate at night. If the skies are clear and their path is moonlit these migrants will often fly at high altitudes avoiding any possible obstructions. But the lights of 20th century society can be confusing to them, especially on foggy, rainy nights or when cloud cover is low. Then they may fly directly into tall lighted structures such as skyscrapers, transmission towers, monuments, lighthouses and the like. Where spotlights are shone into the night sky the birds fly "into" the light and become "entrapped", unable or unwilling to fly out again. Eventually, exhausted, they fall …

Hottonia Inflata Elliot, John E. Ebinger

Specimens by Name

No abstract provided.