Life Sciences Commons^™

Production Of Copper-Complexing Ligands In Response To Elevated Concentrations Of Copper In Marine Synechococcus Spp., Arunsri Chatkaeomorakot Brown

Theses and Dissertations in Biomedical Sciences

Synechococcus spp. (marine cyanobacteria) are extremely sensitive to copper toxicity and can produce high-affinity ligands of unknown structure which form complexes with free cupric ion. These ligands may contribute to the biological control of the levels of free cupric ions in surface seawater. Synechococcus spp. are known to produce metallothioneins (MT) in response to cadmium and zinc stress. In the present study the hypothesis that marine Synechococcus produce MT in response to copper was tested. Three marine Synechococcus spp. i.e., PCC 7001, PCC 73109, and PCC 7003, were exposed to different concentrations of CUSO 4 for various time periods. Size …

Co-Activation Of Gi And Gq Proteins Exerts Synergistic Effect On Human Platelet Aggregation Through Activation Of Phospholipase C And Ca2+ Signalling Pathways, B H. Shah, A Siddiqui, K A. Qureshi, M Khan, S Rafi, V A. Ujan, M Y. Yakoob, Y Yaqub, H Rasheed, S A. Saeed

Department of Biological & Biomedical Sciences

Our previous studies have shown that subthreshold concentrations of two platelet agonists exert synergistic effects on platelet aggregation. Here we studied the mechanism of synergistic interaction of 5-hydroxytryptamine (5-HT) and epinephrine mediated platelet aggregation. We show that 5-HT had no or little effect on aggregation but it did potentiate the aggregation response of epinephrine. The synergistic interaction of 5-HT (1-5 microM) and epinephrine (0.5-2 microM) was inhibited by alpha2-adrenoceptor blocker (yohimbine; IC50= 0.4 microM), calcium channel blockers (verapamil and diltiazem with IC50 of 10 and 48 mM, respectively), PLC inhibitor (U73122; IC50=6 microM) and nitric oxide (NO) donor, SNAP (IC50=1.6 …

Effect Of Amino Acids On Inhibition Of Lactate Dehydrogenase-X By Gossypol, M H. Javed, M A. Khan

Department of Biological & Biomedical Sciences

Gossypol acetic acid (GAA) has been shown to have male antifertility effects, but there are pronounced differences among animal species. In the search of endogenous effector molecules, which interfere with the functions of GAA, we have studied the in vitro effect of various amino acids on the inhibition of the purified LDH-X by GAA. Histidine, cysteine and glycine were shown to block the effect of GAA. The effects of these amino acids were concentration dependent. Histidine and glycine protection was found to be complex type in which both the Km and Vmax were decreased compared to control. Arginine, glutamic acid, …

Genotypic Expression At Different Ages: Ii. Wool Traits Of Sheep, H. Okut, C. M. Bromley, L. Dale Van Vleck, G. D. Snowder

Department of Animal Science: Faculty Publications

Genetic parameters for wool traits for Columbia, Polypay, Rambouillet, and Targhee breeds of sheep were estimated with single- and multiple-trait analyses using REML with animal models. Traits considered were fleece grade, fleece weight, and staple length. Total number of observations ranged from 11,673 to 34,746 for fleece grade and fleece weight and from 3,500 to 11,641 for staple length for the four breeds. For single-trait analyses, data were divided by age of ewe: young ages (age of 1 yr), middle ages (ages of 2 and 3 yr), and older ages (age greater than 3 yr). Heritability estimates averaged over breeds …

Genotypic Expression At Different Ages: I. Prolificacy Traits Of Sheep, H. Okut, C. M. Bromley, L. Dale Van Vleck, G. D. Snowder

Department of Animal Science: Faculty Publications

Genetic parameters for prolificacy traits for Columbia (COLU), Polypay (POLY), Rambouillet (RAMB), and Targhee (TARG) breeds of sheep were estimated with REML using animal models. Traits were number of live births (LAB), litter size at birth (LSB) and weaning (LSW), and litter weight weaned (LWW). Numbers of observations ranged from 5,140 to 7,095 for prolificacy traits and from 5,101 to 8,973 for litter weight weaned for the four breeds. For single-trait analyses, ewes were classified as young (1 yr old), middle-aged (2 and 3 yr old), or older (> 3 yr old). After single-trait analyses, three-trait analyses were done for …

Genotypic Expression With Different Ages Of Dams: Iii. Weight Traits Of Sheep, H. Okut, C. M. Bromley, L. Dale Van Vleck, G. D. Snowder

Department of Animal Science: Faculty Publications

Correlations between genetic expression in lambs when dams were young (1 yr), middle-aged (2 and 3 yr), or older (older than 3 yr) were estimated with three-trait analyses for weight traits. Weights at birth ( BWT) and weaning ( WWT) and ADG from birth to weaning were used. Numbers of observations were 7,731, 9,518, 9,512, and 9,201 for Columbia ( COLU) , Polypay ( POLY) , Rambouillet ( RAMB) , and Targhee ( TARG) breeds of sheep, respectively. When averaged, relative estimates for WWT and ADG were similar across breeds. Estimates were variable across breeds. On average, direct heritability was …

Determination Of Baseline Microbial Biomass Of Tennessee River Gorge Surface Soils Through Chloroform Fumigation And Potassium Sulfate Extraction, Jill Burdette

Honors Theses

Levels of microbial biomass were determined for the A and B-horizons of four plots from the Tennessee River Gorge (TNG), establishing a baseline for future studies. The soils were divided into control and fumigated samples. The fumigated soils were flooded with chloroform, and the carbon was extracted from the control and fumigated soils and quantified through a reflux reaction and subsequent titration with ferrous ammonium sulfate. The extractable carbon was then used to determine the amount of biomass in the soil. The extractable carbon ranged from 62-90% higher in the A-horizon than B-horizon soils with the percent biomass from both …

Diet Overlap Of Native And Translocated Northern White-Tailed Deer In Southeastern Louisiana, Brian Matthew Zielinski

LSU Historical Dissertations and Theses

I used microhistological analysis of fecal pellets to estimate and compare seasonal diet compositions between free-ranging, southern and translocated. northern woodland white-tailed deer (Odocoileus virginianus) on Golden Ranch Hunting Farm, Gheens, Louisiana,. over four consecutive seasons, from January 1997 through January 1998. I analyzed pellet groups with Near Infrared Reflectance Spectroscopy (NIRS) and wet chemistry techniques to evaluate and compare crude protein levels between populations of deer and provide indices of diet quality. On average, native and translocated deer diets were 87.65% similar during the entire study, and were significantly associated during all seasons ( P < 0.0000 I ). suggesting that deer fed on similar plant species in like quantities throughout the year. Few differences were found in plant selection frequencies per fecal sample. hut significant differences were detected (P 0.00 l) among deer populations in the use of Berchemia scandens and Vitis rotundifolia during spring. Northern deer also ingested a greater diversity of plants (P < 0.05) during spring and winter; and fecal crude protein levels were similar (P > 0.05) in all seasons …

Diets Of White-Tailed Deer At Avery Island, Louisiana, Nathan D. Rains

LSU Historical Dissertations and Theses

I conducted a food habits study of white-tailed deer (Odocoileus virginianus) at Avery Island, Louisiana, to determine if deer diets differed among seasons. In 1997, I randomly collected 25 seasonal fecal pellet groups in January. April, August and October respectively I also collected reference forage plant samples in conjunction with fecal pellet collections I estimated botanical composition of deer diets based on a microscopic analysis of fecal pellets I compared diets using a chi- squared contingency table to assess significant seasonal variation I also used Kulczynski's similarity index to determine degree of similarity among seasonal diets

I found significant differences …

Cropwatch No. 99-2, March 19.1999, Lisa Brown Jasa

Crop Watch (1994–2005)

King corn: Getting a good start

Inside

Field updates/calendar…………..12

WeedSoft improved…………..13

Early season corn insects…………..14

Fertilizing wheat…………..16

Precipitation forecast…………..17

Aerate stored grain…………..17

Rootworm resistance…………..18

Environmental Stress And Winterizing Plants, Larry A. Sagers, Jerry L. Goodspeed

Archived Gardening Publications

No abstract provided.

Semianalytic Moderate-Resolution Imaging Spectrometer Algorithms For Chlorophyll A And Absorption With Bio-Optical Domains Based On Nitrate-Depletion Temperatures, Kendall L. Carder, F. R. Chen, Z. P. Lee, S. K. Hawes, D. Kamykowski

Marine Science Faculty Publications

This paper describes algorithms for retrieval of chlorophyll a concentration and phytoplankton and gelbstoff absorption coefficients for the Moderate-Resolution Imaging Spectrometer (MODIS) or sensors with similar spectral channels. The algorithms are based on a semianalytical, bio-optical model of remote sensing reflectance, R_rs([lambda]). The R_rs([lambda]) model has two free variables, the absorption coefficient due to phytoplankton at 675 nn, a_[Phi](675), and the absorption coefficient due to gelbstoff at 400 nm, a_g(400). The R_rs model has several parameters that are fixed or can be specified based on the region and season of the …

Western Pacific Interannual Variability Associated With The El Niño‐Southern Oscillation, Chunzai Wang, Robert H. Weisberg, Jyotika I. Virmani

Marine Science Faculty Publications

Observations of sea surface temperature (SST), sea level pressure (SLP), surface wind, and outgoing longwave radiation (OLR) show that the El Niño‐Southern Oscillation (ENSO) displays western Pacific anomaly patterns in addition to eastern Pacific anomaly patterns. During the warm phase of ENSO, warm SST and low SLP anomalies in the equatorial eastern Pacific and low OLR anomalies in the equatorial central Pacific are accompanied by cold SST and high SLP anomalies in the off‐equatorial western Pacific and high OLR anomalies in the off‐equatorial far western Pacific. Also, while the zonal wind anomalies over the equatorial central Pacific are westerly, those …

Response Of The West Florida Shelf Circulation To Climatological Wind Stress Forcing, Huijun Yang, Robert H. Weisberg

Marine Science Faculty Publications

The response of the west Florida: continental shelf circulation to monthly mean climatological wind forcing is investigated by using the three-dimensional, primitive equation Princeton Ocean Model. Two basic seasonal patterns of circulation and sea surface elevation occur under a barotropic setting: A winter pattern from October to March and a summer pattern from April to September. An interesting finding in winter is an anticyclonic gyre over the northeastern (Florida Big Bend) region that merges with a northwestward flow from the south. The Big Bend Gyre is caused by a convergence of two separate flows: A nearshore along-shelf southeastward flow and …

Particle Fluxes During Austral Spring And Summer In The Southern Ross Sea, Antarctica, Vernon L. Asper, Walker O. Smith Jr.

Faculty Publications

The flux of particles from the euphotic zone through 200 m was investigated on the Ross Sea continental shelf during two cruises, the first in November-December 1994 and the second in December 1995 and January 1996. An assessment of surface layer phytoplankton biomass and productivity was made simultaneously. Particle flux was measured using floating sediment traps whose collection efficiency was assessed rigorously. Phytoplankton biomass and productivity increased rapidly in November-December, and biomass was maximal in mid-December. Thereafter productivity appeared to decline substantially. Biomass declined as well, but mot as rapidly as productivity. Vertical flux rates were low early in the …

Monte Carlo Study Of The Capacitance Of The Double Layer In A Model Molten Salt, Douglas Henderson, Dezso Boda, Kwong-Yu Chan

Faculty Publications

Monte Carlo simulations are reported for charged hard spheres at high density near a charged wall. This system is a simple model for a molten salt double layer. Unfortunately, the reduced temperatures that correspond to experiment are very small. This results in a large Boltzmann factor. As a result, we are unable to obtain meaningful results for such low values and report results only for moderately low values of the reduced temperature. Even so, our results should be a useful benchmark. Further, we are able to give a qualitative answer to an interesting question. We find that at low temperatures …

Isolation Of Trypanosoma Brucei From The Monitor Lizard (Varanus Niloticus) In An Endemic Focus Of Rhodesian Sleeping Sickness In Kenya, Zipporah Njagu, Steve Mihok, Elizabeth Kokwaro, Didier Verloo

All Peer-Reviewed Publications

Monitor lizards were sampled along the shores of Lake Victoria to detect natural infections of potentially human-infective trypanosomes. In an area with endemic rhodesian sleeping sickness, one of 19 lizards was infected (Busia, Kenya). Six of ten lizards also showed indirect evidence of infection with Trypanosoma brucei (antibody ELISA). In an area with no recent history of human disease (Rusinga Island), no parasites were found and no antibodies to T. brucei were detected. The isolate was identified as T. brucei through xenodiagnosis (completion of the life cycle in the salivary glands of tsetse), and through molecular techniques (positive reactions with …

Meeting Minutes, March 9th, 1999, National Smokejumper Association Executive Committee

National Smokejumper Association Meeting Minutes

Agenda: Minutes: minutes of the Executive Committee meeting held 02/09/99.; Treasurer's Report: report March 9, 1999.; Two new accounts had been added.; Membership: figure for Jan and Feb was probably incorrect.; Old Business: Directors meeting discussed.; Rough draft of a NSA brochure.; Criticism of collecting bases info for Newsletter.; SJ video rough cut.; Video committee meeting.; IRS issues.; New Business: NSA stationery.; CPS reunion.; Reported on the 50th anniversary remembrance of the Mann Gulch Fire.; Dick Tracy health.; Next executive committee meeting for Apr 6 at 07:00 PM.;

Cropwatch No. 99-1, March 5, 1999, Lisa Brown Jasa

Crop Watch (1994–2005)

Inside

Act quickly to spring seed winter wheat ...............1

Updates ...............2

Emergency tillage can save soil, wheat ...............3

Selecting spring wheat seed ...............3

Be watching for army cutworm invasion ...............4

Signs of early season wheat diseases ...............4

Evaluating winter wheat stands ...............5

Grain sorghum fares well against corn ...............6

Developing a weed management strategy ...............7

Which herbicide is best for your broadleaves? ...............8

Measurement Of The Cross-Sectional Area Of The Nasal Passages Of Nine Species Of Modern Odontoceti With Implications For Comparative Physiology And The Paleophysiology Of The Dinosauria, Eric Paul Katz

Dissertations and Theses

In search of evidence for or against the endothermic dinosaur hypothesis, a recent study by Ruben et al. (1996) revealed that endotherms tend to have larger nasal cross-sectional areas than ectotherms of the same mass. The reason offered for this observation was that larger nasal passages are needed to house the complex respiratory turbinates possessed by endotherms. Whales were excluded from the study on the grounds that they have no nasal turbinates. In the present study, the cross-sectional area of the nasal passages of nine species of Odontoceti were measured by the use of latex casts. The regression of log …

Variance Caused By Cytoplasmic Line And Sire By Herd Interaction Effects For Milk Yield Considering Estimation Bias, P. R. N. Rorato, Jeffrey F. Keown, L. Dale Van Vleck

Department of Animal Science: Faculty Publications

A total of 138,869 lactation milk yields (305 d, milked twice daily, mature equivalent) from the first three parities of 68,063 New York Holstein cows were used to estimate variance components that were due to additive direct genetic effects, cow permanent environmental effects (cow within sire for sire model), sire by herd interaction effects, and cytoplasmic line effects. The original data were assigned to 10 random samples, which were each analyzed using an animal model and a sire model. From each sample of original data, 20 other samples were analyzed with levels assigned randomly to cytoplasmic and interaction effects (data …

Table Of Contents Volume 10, Number Two, Spring 1999, Risk Editorial Board

RISK: Health, Safety & Environment (1990-2002)

Table of contents for the journal RISK: Health, Safety & Environment (ISSN: 1073-8673)

Looking Back: Cyclamate, Allan Mazur, Kevin Jacobson

RISK: Health, Safety & Environment (1990-2002)

The second in a series re-evaluating hazards identified in the 1950s and 60s.

Hexapod Herald - Vol. 11, No. 1, March 1, 1999

Hexapod Herald and Other Entomology Department Newsletters

Grants

Presentations

Congratulations

Welcome

Graduate student news

Publications

Travel

Calendar of events

Response Of Channel Catfish, Ictaluri Punctatus, T-Lymphocytes To Outer Membrane Proteins Of Edwardsiella Ictaluri, Marlin Ann Lawson

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 Marlin Ann Lawson on February 29, 1999.

Modifications Of Phosphocaseinate Solutions Treated By Selective Adsorption, Nathalie Martin, Rafael Jiménez-Flores, Phillip S. Tong, Yves Pouliot, Michel Britten

Dairy Science

The treatment of phosphocaseinate by adsorption with diatomaceous earths has been studied. The results suggest that magnesium and calcium silicates have a specific affinity for milk proteins. As a result, the ratio of individual casein types in phosphocaseinate solution can be manipulated.

Land Evaluation Standards For Land Resource Mapping : Guidelines For Assessing Land Qualities And Determining Land Capability In South-West Western Australia, Dennis Van Gool, Geoff Allan Moore

Resource management technical reports

Updated by report 298, van Gool, D, Tille, P J, and Moore, G A. (2005)
This report provides a standard method for attributing and evaluating digital land resource maps in Western Australia so that strategic decisions about the management, development and consevation of land resources can be based on the best information available. The standards update the generic methodology described by Wells and King (1989) which have been used routinely for the assessment of land resources in catchment and land use planning in Western Australia.

Forage News [1999-03], Department Of Plant And Soil Sciences, University Of Kentucky

Forage News

• Commissioner of Agriculture to Address Alfalfa Conference
• Jeffries New AFGC President
• Ken Johnson Elected to AFGC Board
• Grazing Data Summarized
• Economic Optimum Stocking Rates: Some Alternative Perspectives
• Quality Characteristics of Eastern Gamagrass Forages
• Harvesting Quality Hay: What the Research Shows
• Upcoming Events

Fisheries Research Report No. 113 - Catch, Effort And The Conversion From Gill Nets To Traps In The Peel-Harvey And Cockburn Sound Blue Swimmer Crab (Portunus Pelagicus) Fisheries, Roy Melville-Smith, Mark Cliff, Sonia M. Anderton

Fisheries Research Reports

Over the last few years, there has been considerable interest on the part of commercial fishers to move away from using gill nets, the traditional method for fishing for blue swimmer crabs in Western Australia (WA), to fishing with traps. Blue swimmer crab fisheries in WA are regulated by effort controls and most gill net fishers are restricted to hauling 1,000 metres (1,200 metres in the case of Cockburn Sound) of gill net per day.

The fieldwork in this study was initiated in March 1994 in Cockburn Sound and in January 1996 in the Peel-Harvey Estuary. It was aimed at …

Horticulture Research Report 1994 - 1998, Frank Wise Institute, Kununurra, Department Of Agriculture, Western Australia, D. Robinson, M. Howes, R. Randell

Horticulture research reports

This report summarises horticultural research, development and extension activities undertaken by staff from the Kununurra District Office during the period 1993 to 1998 and reported annually at the Frank Wise Institute Horticultural Research Review. The range and extent of activities presented and supported by Agriculture Western Australia with industry collaboration indicates the importance of horticulture in the economies of the Kimberley Region and Western Australia. Further support by funding bodies and agribusiness, and collaboration with other research organizations is also acknowledged. Since the early 1980's, horticultural output and value of production from the Ord River Irrigation Area (ORIA) have risen …