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Analysis Of Maize (Zea Mays Subsp. Mays) Pollen: Normalizing The Effects Of Microscope?Slide Mounting Media On Diameter Determinations, Andrew Sluyter Jan 1997

Analysis Of Maize (Zea Mays Subsp. Mays) Pollen: Normalizing The Effects Of Microscope?Slide Mounting Media On Diameter Determinations, Andrew Sluyter

Faculty Publications

Maize (Zea mays subsp. mays) dominates the record of prehistoric agriculture in the Neotropics. Nonetheless, many significant questions of Zea systematics and evolution persist. Palynology provides a record central to addressing those questions, but determining pollen grain diameter remains a significant method- ological issue: diameter is a key characteristic in identification, and diameter seems to be space-time dependent - the latter phenomenon but little understood. One issue in analyzing diam- eter is the confounding effect of microscope-slide mounting media. This study provides correction factors to normalize diam- eter among silicon oil, glycerine jelly, and acrylic resin (du Pont Elvacite), the …

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On “Buried Epistemologies: The Politics Of Nature In (Post) Colonial British Columbia”: On Excavating And Burying Epistemologies, Andrew Sluyter Jan 1997

On “Buried Epistemologies: The Politics Of Nature In (Post) Colonial British Columbia”: On Excavating And Burying Epistemologies, Andrew Sluyter

Faculty Publications

No abstract provided.

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Landscape Change And Livestock In Sixteenth-Century New Spain: The Archival Data Base, Andrew Sluyter Jan 1997

Landscape Change And Livestock In Sixteenth-Century New Spain: The Archival Data Base, Andrew Sluyter

Faculty Publications

Despite the wealth of Mexican archival data pertinent to understanding the ecological interaction between livestock and landscape during the sixteenth century in New Spain, some fundamental methodological issues persist in the use of the mercedes, or land grants. The degree of completeness of the extant mercedes record and the de facto areal extents of the cattle and sheep estancias both remain uncertain. A cartographic method applied to mercedes for the central Veracruz lowlands addresses those issues and suggests a general method for rigorous analysis of the data base. That method demonstrates that the extant mercedes provide a nearly complete record …

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Regional, Holocene Records Of The Human Dimension Of Global Change: Sea-Level And Land-Use Change In Prehistoric Mexico, Andrew Sluyter Jan 1997

Regional, Holocene Records Of The Human Dimension Of Global Change: Sea-Level And Land-Use Change In Prehistoric Mexico, Andrew Sluyter

Faculty Publications

Regional, Holocene records hold particular relevance for understanding the reciprocal nature of global environmental change and one of its major human dimensions: "sustainable agriculture", i.e., food production strategies which entail fewer causes of and are less susceptible to environmental change. In an epoch of accelerating anthropogenic transformation, those records reveal the protracted regional causes and consequences of change (often agricultural) in the global system as well as informing models of prehistoric, intensive agriculture which, because of long tenures and high productivities, suggest strategies for sustainable agricultural in the present. This study employs physiographic analysis and the palynological, geochemical record from …

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Herpes Simplex Virus Type 1 Glycoprotein K Is Not Essential For Infectious Virus Production In Actively Replicating Cells But Is Required For Efficient Envelopment And Translocation Of Infectious Virions From The Cytoplasm To The Extracellular Space, Sukhanya Jayachandra, Abolghasem Baghian, Konstantin G. Kousoulas Jan 1997

Herpes Simplex Virus Type 1 Glycoprotein K Is Not Essential For Infectious Virus Production In Actively Replicating Cells But Is Required For Efficient Envelopment And Translocation Of Infectious Virions From The Cytoplasm To The Extracellular Space, Sukhanya Jayachandra, Abolghasem Baghian, Konstantin G. Kousoulas

Faculty Publications

We characterized the glycoprotein K (gK)-null herpes simplex virus type 1 [HSV-1] (KOS) ΔgK and compared it to the gK-null virus HSV-1 F-gKβ (L. Hutchinson et al., J. Virol. 69:5401-5413, 1995). Δgk and F-gKβ mutant viruses produced small plaques on Vero cel monolayers at 48 h postinfection. F-gKβ caused extensive fusion of 143TK cells that was sensitive to melittin, a specific inhibitor of gK-induced cell fusion, while ΔgK virus did not fuse 143TK cells. A recombinant plasmid containing the truncated gK gene specified by F-gKβ failed to rescue the ICP27-null virus KOS (d27-1), while a plasmid with the ΔgK deletion …

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Development Of A Protein-Free Chemically Defined Culture Medium For The Propagation Of The Oyster Pathogen Perkinsus Marinus, J. F. La Peyre, M. Faisal Jan 1997

Development Of A Protein-Free Chemically Defined Culture Medium For The Propagation Of The Oyster Pathogen Perkinsus Marinus, J. F. La Peyre, M. Faisal

Faculty Publications

In the present study we describe a protein-free, chemically defined culture medium, designated JL-ODRP-3, which supports the propagation of Perkinsus marinus, a parasite of the eastern oyster, Crassostrea virginica. P. marinus adapted rapidly to the defined medium and the growth rate of the protozoan increased significantly following a few subcultures. Two isolates of P. marinus, one from the Chesapeake Bay (Virginia) and the other from the Gulf of Mexico (Texas) were cultured for at least ten passes. The doubling times for the isolates from Virginia and Texas, in log phase, were 18 ± 1.2 and 28.6 ± 3.2 hours respectively, …

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Transgenic Dairy Cattle: Genetic Engineering On A Large Scale, R. J. Wall, D. E. Kerr, K. R. Bondioli Jan 1997

Transgenic Dairy Cattle: Genetic Engineering On A Large Scale, R. J. Wall, D. E. Kerr, K. R. Bondioli

Faculty Publications

Amid the explosion of fundamental knowledge generated from transgenic animal models, a small group of scientists has been producing transgenic livestock with goals of improving animal production efficiency and generating new products. The ability to modify mammary-specific genes provides an opportunity to pursue several distinctly different avenues of research. The objective of the emerging gene "pharming" industry is to produce pharmaceuticals for treat-ing human diseases. It is argued that mammary glands are an ideal site for producing complex bioactive proteins that can be cost effectively harvested and purified. Consequently, during the past decade, approximately a dozen companies have been created …

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Attenuation, Persistence, And Vaccine Potential Of An Edwardsiella Ictaluri Pura Mutant, Mark L. Lawrence, Richard K. Cooper, Ronald L. Thune Jan 1997

Attenuation, Persistence, And Vaccine Potential Of An Edwardsiella Ictaluri Pura Mutant, Mark L. Lawrence, Richard K. Cooper, Ronald L. Thune

Faculty Publications

In this study, an adenine-auxotrophic strain of Edwardsiella ictaluri was constructed and its virulence, tissue persistence, and vaccine efficacy were evaluated. A clone containing the purA gene was isolated from an E. ictaluri genomic library, sequenced, and shown to have an overall sequence identity of 79.3% at the nucleotide level and 85.7% at the amino acid level with the Escherichia coli purA gene. The cloned E. ictaluri purA gene was mutated by deleting a 598-bp segment of the gene and inserting the kanamycin resistance gene from TraP03 into the gap. The ApurA::Km(r) gene was subcloned into the suicide plasmid pGP704, …

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Interactive Effects Of Betaine And Monensin In Uninfected And Eimeria Acervulina-Infected Chicks, J. O. Matthews, T. L. Ward, L. L. Southern Jan 1997

Interactive Effects Of Betaine And Monensin In Uninfected And Eimeria Acervulina-Infected Chicks, J. O. Matthews, T. L. Ward, L. L. Southern

Faculty Publications

Three experiments (Exp.) were conducted to evaluate the interactive effects of dietary betaine (BET) and monensin (MON) in uninfected or Eimeria acervulina-infected chicks. The treatments were replicated with six (Exp. 1) or five (Exp. 2 and 3) pens of five chicks each. The experimental periods lasted 9 (Exp. 1 and 2) or 10 (Exp. 3) d each and the coccidiosis infections were established on Day 2 (Exp. 1 and 2) or Day 3 (Exp. 3) of the experiment. Average initial weight of the chicks was 101, 73, and 68 g in Exp. 1 to 3, respectively, and the initial age …

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Modeling Human Evolution - To Tree Or Not To Tree?, Stephen T. Sherry, Mark A. Batzer Jan 1997

Modeling Human Evolution - To Tree Or Not To Tree?, Stephen T. Sherry, Mark A. Batzer

Faculty Publications

No abstract provided.

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Alu Insertion Polymorphisms And Human Evolution: Evidence For A Larger Population Size In Africa, Mark Stoneking, Jennifer J. Fontius, Stephanie L. Clifford, Himla Soodyall, Santosh S. Arcot, Nilmani Saha, Trefor Jenkins, Mohammad A. Tahir, Prescott L. Deininger, Mark A. Batzer Jan 1997

Alu Insertion Polymorphisms And Human Evolution: Evidence For A Larger Population Size In Africa, Mark Stoneking, Jennifer J. Fontius, Stephanie L. Clifford, Himla Soodyall, Santosh S. Arcot, Nilmani Saha, Trefor Jenkins, Mohammad A. Tahir, Prescott L. Deininger, Mark A. Batzer

Faculty Publications

Alu insertion polymorphisms (polymorphisms consisting of the presence/absence of an Alu element at a particular chromosomal location) offer several advantages over other nuclear DNA polymorphisms for human evolution studies. First, they are typed by rapid, simple, PCR-based assays; second, they are stable polymorphisms-newly inserted Alu elements rarely undergo deletion; third, the presence of an Alu element represents identity by descent-the probability that different Alu elements would independently insert into the exact same chromosomal location is negligible; and fourth, the ancestral state is known with certainty to be the absence of an Alu element. We report here a study of 8 …

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Gas-To-Wall Absorbed Dose Conversion Factors For Neutron Energies Of 25 To 250 Mev, W. D. Newhauser, U. J. Schrewe Jan 1997

Gas-To-Wall Absorbed Dose Conversion Factors For Neutron Energies Of 25 To 250 Mev, W. D. Newhauser, U. J. Schrewe

Faculty Publications

Cavity chamber absorbed dose measurements do not usually strictly adhere to the conditions of the Fano theorem and therefore the differences in the gas and wall mass stopping powers must be taken into account. Values of gas-to-wall absorbed dose conversion factors rm,g were calculated for neutron energies of 25 to 250 MeV for detectors with walls of C, O, Mg, Al, Si, Fe, Zr, AlN, Al2O3, SiO2, ZrO2, and A-150 tissue-equivalent (TE) plastic and with gas cavities of acetylene, dry air, Ar, an Ar-CO2 mixture, CO2, isobutane, isobutane-based TE, methane, methane-based TE, propane, and propane-based TE. The rm,g calculations required …

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Measurements Of The Reactions [Formula Presented] And [Formula Presented], C. Athanassopoulos, L. B. Auerbach, R. L. Burman, D. O. Caldwell, E. Church, I. Cohen, B. D. Dieterle, J. B. Donahue, A. M. Eisner, A. Fazely, F. J. Federspiel, G. T. Garvey, M. Gray, R. M. Gunasingha, R. Imlay, K. Johnston, H. J. Kim, W. C. Louis, R. Majkic, K. Mcilhany, W. Metcalf, G. B. Mills, R. A. Reeder, V. Sandberg, D. Smith, I. Stancu, W. Strossman, R. Tayloe, G. J. Vandalen, W. Vernon, N. Wadia, J. Waltz, Y. X. Wang Jan 1997

Measurements Of The Reactions [Formula Presented] And [Formula Presented], C. Athanassopoulos, L. B. Auerbach, R. L. Burman, D. O. Caldwell, E. Church, I. Cohen, B. D. Dieterle, J. B. Donahue, A. M. Eisner, A. Fazely, F. J. Federspiel, G. T. Garvey, M. Gray, R. M. Gunasingha, R. Imlay, K. Johnston, H. J. Kim, W. C. Louis, R. Majkic, K. Mcilhany, W. Metcalf, G. B. Mills, R. A. Reeder, V. Sandberg, D. Smith, I. Stancu, W. Strossman, R. Tayloe, G. J. Vandalen, W. Vernon, N. Wadia, J. Waltz, Y. X. Wang

Faculty Publications

Charged current scattering of [Formula Presented] on [Formula Presented] has been studied using a [Formula Presented] decay-in-flight [Formula Presented] beam at the Los Alamos Meson Physics Facility. A sample of 56.8 [Formula Presented] events satisfying criteria for the exclusive reaction [Formula Presented] was obtained using a large liquid scintillator neutrino detector. The observed flux-averaged cross section [Formula Presented] agrees well with reliable theoretical expectations. A measurement was also obtained for the inclusive cross section to all accessible [Formula Presented] states [Formula Presented] This flux-averaged cross section is [Formula Presented] which is approximately half of that given by a recent continuum …

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The Zeus Leading Proton Spectrometer And Its Use In The Measurement Of Elastic Ρ0 Photoproduction At Hera, M. Derrick, D. Krakauer, S. Magill, D. Mikunas, B. Musgrave, J. R. Okrasiński, J. Repond, R. Stanek, R. L. Talaga, H. Zhang, M. C.K. Mattingly, F. Anselmo, P. Antonioli, G. Bari, M. Basile, L. Bellagamba, D. Boscherini, A. Bruni, G. Bruni, P. Bruni, G. Cara Romeo, G. Castellini, M. Chiarini, L. Cifarelli, F. Cindolo, A. Contin, M. Corradi, I. Gialas, P. Giusti, G. Iacobucci, G. Laurenti, G. Levi, A. Margotti Jan 1997

The Zeus Leading Proton Spectrometer And Its Use In The Measurement Of Elastic Ρ0 Photoproduction At Hera, M. Derrick, D. Krakauer, S. Magill, D. Mikunas, B. Musgrave, J. R. Okrasiński, J. Repond, R. Stanek, R. L. Talaga, H. Zhang, M. C.K. Mattingly, F. Anselmo, P. Antonioli, G. Bari, M. Basile, L. Bellagamba, D. Boscherini, A. Bruni, G. Bruni, P. Bruni, G. Cara Romeo, G. Castellini, M. Chiarini, L. Cifarelli, F. Cindolo, A. Contin, M. Corradi, I. Gialas, P. Giusti, G. Iacobucci, G. Laurenti, G. Levi, A. Margotti

Faculty Publications

The differential cross section dσ/dt for elastic ρ0 photoproduction, γp → ρ0ρ (ρ0 → π+π-), has been measured in ep interactions at HERA. The squared four-momentum exchanged at the proton vertex, t, has been determined directly by measuring the momentum of the scattered proton using the ZEUS Leading Proton Spectrometer (LPS), a large scale system of silicon micro-strip detectors operating close to the HERA proton beam. The LPS allows the measurement of the momentum of high energy protons scattered at small angles with accuracies of 0.4% for the longitudinal momentum and 5 MeV for the transverse momentum. Photoproduction of ρ0 …

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Search For Lepton Flavor Violation In Ep Collisions At 300 Gev Center Of Mass Energy, M. Derrick, D. Krakauer, S. Magill, D. Mikunas, B. Musgrave, J. R. Okrasiński, J. Repond, R. Stanek, R. L. Talaga, H. Zhang, M. C.K. Mattingly, F. Anselmo, P. Antonioli, G. Bari, M. Basile, L. Bellagamba, D. Boscherini, A. Bruni, G. Bruni, P. Bruni, G. Cara Romeo, G. Castellini, L. Cifarelli, F. Cindolo, A. Contin, M. Corradi, I. Gialas, P. Giusti, G. Iacobucci, G. Laurenti, G. Levi, A. Margotti, T. Massam Jan 1997

Search For Lepton Flavor Violation In Ep Collisions At 300 Gev Center Of Mass Energy, M. Derrick, D. Krakauer, S. Magill, D. Mikunas, B. Musgrave, J. R. Okrasiński, J. Repond, R. Stanek, R. L. Talaga, H. Zhang, M. C.K. Mattingly, F. Anselmo, P. Antonioli, G. Bari, M. Basile, L. Bellagamba, D. Boscherini, A. Bruni, G. Bruni, P. Bruni, G. Cara Romeo, G. Castellini, L. Cifarelli, F. Cindolo, A. Contin, M. Corradi, I. Gialas, P. Giusti, G. Iacobucci, G. Laurenti, G. Levi, A. Margotti, T. Massam

Faculty Publications

Using the ZEUS detector at the HERA electron-proton collider, we have searched for lepton flavor violation in ep collisions at a center-of-mass energy (√s) of 300 GeV. Events of the type e + p → ℓ + X with a final-state lepton of high transverse momentum, ℓ = μ or τ, were sought. No evidence was found for lepton flavor violation in the combined 1993 and 1994 data samples, for which the integrated luminosities were 0.84 pb-1 for e-p collisions and 2.94 pb-1 for e+p collisions. Limits on coupling vs. mass are provided for leptoquarks and R-parity violating squarks. For …

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A Geometric Method For Location Of Gravitational Wave Sources, Nadja S. Magalhães, Warren W. Johnson, Carlos Frajuca, Odylio D. Aguiar Jan 1997

A Geometric Method For Location Of Gravitational Wave Sources, Nadja S. Magalhães, Warren W. Johnson, Carlos Frajuca, Odylio D. Aguiar

Faculty Publications

We show that the interaction of a gravitational wave with a spherical resonant-mass antenna changes the antenna's shape to that of an ellipsoid. These changes in shape always determine the direction of the incoming wave and may provide information on the wave's polarization. We present a new approach for determining the position of astrophysical sources of gravitational waves which involves fewer calculations than in earlier methods. We also show how the measured quantities relate to the energy density of the wave. © 1997. The American Astronomical Society. All rights reserved.

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Techniques For Detecting Gravitational Waves With A Spherical Antenna, Stephen M. Merkowitz, Warren W. Johnson Jan 1997

Techniques For Detecting Gravitational Waves With A Spherical Antenna, Stephen M. Merkowitz, Warren W. Johnson

Faculty Publications

We report the results of a theoretical and experimental study of a spherical gravitational wave antenna. We develop a number of techniques to deconvolve the data from a set of resonant transducers attached to the surface of a sphere to monitor the sphere’s five quadrupole modes. We show that by observing these modes, one can measure the five tensorial components of a gravitational wave. The inverse problem can then be solved and the direction of a gravitational wave can be determined. Asymmetries such as the nondegeneracy of the quadrupole modes and mistuning of the transducers are included in the model …

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Generation Of Attosecond Pulses In Macroscopic Media, Philippe Antoine, Dejan B. Milošević, Anne L’Huillier, Mette B. Gaarde, Pascal Salières, Maciej Lewenstein Jan 1997

Generation Of Attosecond Pulses In Macroscopic Media, Philippe Antoine, Dejan B. Milošević, Anne L’Huillier, Mette B. Gaarde, Pascal Salières, Maciej Lewenstein

Faculty Publications

We describe theoretically the generation of ultrashort (subfemtosecond) pulses using high-order harmonics of a laser pulse with a time-dependent degree of ellipticity. The single-atom response is calculated by using a low-frequency strong-field approximation. Propagation effects are taken into account using a method going beyond the slowly varying envelope approximation. Propagation modifies significantly the results obtained in the single-atom response and, in certain conditions, makes the generation of one attosecond pulse possible. We discuss prospects for the observation of these ultrashort pulses. © 1997 The American Physical Society.

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Phase-Locked High-Order Harmonic Sources, Raoul Zerne, Carlo Altucci, Marco Bellini, Mette B. Gaarde, T. W. Hänsch, Anne L’Huillier, Claire Lyngå, C. G. Wahlström Jan 1997

Phase-Locked High-Order Harmonic Sources, Raoul Zerne, Carlo Altucci, Marco Bellini, Mette B. Gaarde, T. W. Hänsch, Anne L’Huillier, Claire Lyngå, C. G. Wahlström

Faculty Publications

We demonstrate that two harmonic sources generated independently in a xenon gas jet using the same picosecond Nd:YAG laser are locked in phase. The experiment is performed by separating a laser beam into two parallel beams focused at different locations under the nozzle of a gas jet, and therefore producing two independent sources of harmonic radiation, and studying the pattern obtained in the far field when the radiations from these sources interfere. A high and robust fringe visibility is obtained. © 1997 The American Physical Society.

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Numerical Modeling Of Self-Propagating Polymerization Fronts: The Role Of Kinetics On Front Stability, Stanislav E. Solovyov, Victor M. Llyashenko, John A. Pojman Jan 1997

Numerical Modeling Of Self-Propagating Polymerization Fronts: The Role Of Kinetics On Front Stability, Stanislav E. Solovyov, Victor M. Llyashenko, John A. Pojman

Faculty Publications

Frontal propagation of a highly exothermic polymerization reaction in a liquid is studied with the goal of developing a mathematical model of the process. As a model case we consider monomers such as methacrylic acid and n -butyl acrylate with peroxide initiators, although the model is not limited to these reactants and can be applied to any system with the similar basic polymerization mechanism. A three-step reaction mechanism, including initiation, propagation and termination steps, as well as a more simple one-step mechanism, were considered. For the one-step mechanism the loss of stability of propagating front was observed as a sequence …

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Crystal Structure Of (R,R)-N,N',-(2,2'-Bipyridine-6,6'-Dimethylenediyl)-Bis-(2,2'-Dimethoxy-1,1'-Binaphthalene-3-Carboxamide) Tetratoluene Solvate, (C58H46O6N4)2 · 4c7H8, S. Pakhomova, J. Ondrácek, J. Hodacová, I. Stibor Jan 1997

Crystal Structure Of (R,R)-N,N',-(2,2'-Bipyridine-6,6'-Dimethylenediyl)-Bis-(2,2'-Dimethoxy-1,1'-Binaphthalene-3-Carboxamide) Tetratoluene Solvate, (C58H46O6N4)2 · 4c7H8, S. Pakhomova, J. Ondrácek, J. Hodacová, I. Stibor

Faculty Publications

No abstract provided.

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Phytochrome Gene Diversity, S. Mathews, R. A. Sharrock Jan 1997

Phytochrome Gene Diversity, S. Mathews, R. A. Sharrock

Faculty Publications

The structures and functions of the phytochrome apoprotein genes (the PHY genes), their diversity across the plant kingdom, and their evolution are central concerns in the study of red-light sensing in plants. We summarize here recent advances in two areas relating to these topics: (1) the characteristics of the PHY gene family in Arabidopsis thaliana, the higher plant species for which the most extensive information on these genes is available, and (2) the similarity relationships, phylogeny, and evolutionary implications of PHY gene sequences and partial sequences which have been described from various plants. Together, these two areas of study, one …

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Information Capacity Of The Carbohydrate Code, Roger A. Laine Jan 1997

Information Capacity Of The Carbohydrate Code, Roger A. Laine

Faculty Publications

Capacity for information in biological molecules is traditionally thought to reside in the primary sequence of proteins and RNA, recorded in the DNA. With the exception of some RNA molecules, proteins, if not structural, carry their information in binding sites for substrates of reactions, or in binding sites for control molecules. Some proteins bind to complex carbohydrates in a carbohydrate-specific fashion, including enzymes, lectins and antibodies. These carbohydrates, assembled by sequential glycosyl transferases, also carry biological information, the other side of which is a binding protein that recognizes a specific sugar monosaccharides, sequence, anomerity, linkage, ring size, branching and substitution. …

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Regulation Of Root-Associated Methanotrophy By Oxygen Availability In The Rhizosphere Of Two Aquatic Macrophytes, Aram Calhoun, Gary M. King Jan 1997

Regulation Of Root-Associated Methanotrophy By Oxygen Availability In The Rhizosphere Of Two Aquatic Macrophytes, Aram Calhoun, Gary M. King

Faculty Publications

The relative importance of oxygen for root-associated methanotrophy was examined by using sediment-free, intact freshwater marsh plants (Pontederia cordata and Sparganium eurycarpum) incubated in split chambers. The root medium contained approximately 100 μM methane. Methane oxidation was calculated from the difference between methane loss from chambers in the presence and absence of 1 mM 1-allyl-2-thiourea, a methanotrophic inhibitor. When the root medium was oxic, methane oxidation accounted for 88 and 63% of the total methane depletion for S. eurycarpum and P. cordata, respectively; the remainder represented diffusional loss to the atmosphere via roots, stems, and leaves. Under suboxic conditions, methane …

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Aging-Induced Changes In Populations Of Lactococci, Lactobacilli, And Aerobic Microorganisms In Low-Fat And Full-Fat Cheddar Cheese, Z. U. Haque, E. Kucukoner, K. J. Aryana Jan 1997

Aging-Induced Changes In Populations Of Lactococci, Lactobacilli, And Aerobic Microorganisms In Low-Fat And Full-Fat Cheddar Cheese, Z. U. Haque, E. Kucukoner, K. J. Aryana

Faculty Publications

The objective of this study was to observe the impact of lowering fat content on the microflora of Cheddar cheese. Full-fat (32%) and low-fat (5%) Cheddar cheeses were produced and evaluated one day after manufacture and at monthly intervals for 5 months. The cheeses were aged at 4°C after being dipped in mold inhibitor and vacuum packed in high-density polythene bags. Standard plate counts and counts of lactococci and lactobacilli were performed. Transmission and scanning electron microscopy of the microflora were also conducted. The lactococci decreased gradually over the ripening period, while the lactobacilli, though not knowingly added during Cheddar …

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Simultaneous Monitoring Of Heart Rate And Motion To Assess Energy Expenditure, Amy Luke, Kevin C. Maki, Nanette Barkey, Richard Cooper, Daniel Mcgee Jan 1997

Simultaneous Monitoring Of Heart Rate And Motion To Assess Energy Expenditure, Amy Luke, Kevin C. Maki, Nanette Barkey, Richard Cooper, Daniel Mcgee

Faculty Publications

Measurement of energy expenditure in free-living individuals represents a methodologic challenge in epidemiologic research. Heart rate monitors, while closely tied to energy expenditure at high levels or energy output, provide much less predictive power at low levels: however, measurement of motion may improve the predictive ability. This study was undertaken to determine the usefulness of simultaneously monitoring heart rate and motion for the estimation of energy expenditure. Ten subjects were studied during simulated activities of daily living (ADLC) and submaximal treadmill tests. Compared to direct measurement, the motion sensor predicted oxygen consumption poorly (r2 = 0.53) for both tests. Heart …

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The Prevalence Of Hypertension In Seven Populations Of West African Origin, Richard Cooper, Charles Rotimi, Susan Ataman, Daniel Mcgee, Babatunde Osotimehin, Solomon Kadiri, Walinjom Muna, Samuel Kingue, Henry Fraser, Terrence Forrester, Franklyn Bennett, Rainford Wilks Jan 1997

The Prevalence Of Hypertension In Seven Populations Of West African Origin, Richard Cooper, Charles Rotimi, Susan Ataman, Daniel Mcgee, Babatunde Osotimehin, Solomon Kadiri, Walinjom Muna, Samuel Kingue, Henry Fraser, Terrence Forrester, Franklyn Bennett, Rainford Wilks

Faculty Publications

Objectives. This study was undertaken to describe the distribution of blood pressures, hypertension prevalence, and associated risk factors among seven populations of West African origin. Methods. The rates of hypertension in West Africa (Nigeria and Cameroon), the Caribbean (Jamaica, St. Lucia, Barbados), and the United States (metropolitan Chicago, Illinois) were compared on the basis of a highly standardized collaborative protocol. After researchers were given central training in survey methods, population-based samples of 800 to 2500 adults over the age of 25 were examined in seven sites, yielding a total sample of 10 014. Results. A consistent gradient of hypertension prevalence …

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Leptin Concentration In Women Is Influenced By Regional Distribution Of Adipose Tissue, Franklyn I. Bennett, Norma Mcfarlane-Anderson, Rainford Wilks, Amy Luke, Richard S. Cooper, Terrence E. Forrester Jan 1997

Leptin Concentration In Women Is Influenced By Regional Distribution Of Adipose Tissue, Franklyn I. Bennett, Norma Mcfarlane-Anderson, Rainford Wilks, Amy Luke, Richard S. Cooper, Terrence E. Forrester

Faculty Publications

Leptin concentrations in humans are increased with obesity, and women have higher leptin concentrations than men. This sex difference reflects the greater fat mass of women. However, there is evidence that factors other than the size of the adipose tissue mass contribute to serum leptin concentrations. This study was undertaken to determine whether anthropometric factors influenced leptin concentrations in our population. Leptin concentrations were measured in 375 persons from a population study of hypertension and diabetes for whom body-composition data (bioelectrical impedance analysis and anthropometry) were available. Serum leptin concentrations were more than four times higher in women than in …

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Efficacy Of Bacillus Thuringiensis And Cabbage Cultivar Resistance To Diamondback Moth (Lepidoptera: Yponomeutidae), Paul W. Ivey, Seth J. Johnson Jan 1997

Efficacy Of Bacillus Thuringiensis And Cabbage Cultivar Resistance To Diamondback Moth (Lepidoptera: Yponomeutidae), Paul W. Ivey, Seth J. Johnson

Faculty Publications

Population density estimates were used to determine the effectiveness of a commercial formulation of Bacillus thuringiensis Berliner subspp. kurstaki and aizawai (Agree 50 WP®) and host plant resistance in three cabbage cultivars against the diamondback moth, Plutella xylostella (L.). Cabbage plots treated with agree 50 WP® had significantly fewer larvae per plant compared with untreated ones. The ranking from most to least susceptible of the three main cabbage cultivate grown in Jamaica was 'KY Cross' > 'Early Jersey' > 'Tropicana'. These findings provide evidence that a new cabbage hybrid, 'Tropicana', and products containing effective strains of B. thuringiensis may be successfully used …

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Transfer Of Relational Mapping Between Different Symbol Systems By Young Children, Sandy L. Dimiterchik Jan 1997

Transfer Of Relational Mapping Between Different Symbol Systems By Young Children, Sandy L. Dimiterchik

Honors Capstones

No abstract provided.

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