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1997

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Articles 1 - 30 of 52

Full-Text Articles in Life Sciences

A Vegetation Based Approach To Biodiversity Gap Analysis In The Agastyamalai Region, Western Ghats, India, B. R. Ramesh, Shaily Menon, Kamaljit S. Bawa Nov 1997

A Vegetation Based Approach To Biodiversity Gap Analysis In The Agastyamalai Region, Western Ghats, India, B. R. Ramesh, Shaily Menon, Kamaljit S. Bawa

Shaily Menon

Protected areas in India have historically been established on an ad hoc basis with little attention to the conservation value of an area. This study focuses on a set of protected areas in the Agastyamalai region of the Western Ghats (WG), India. We examine forest loss and land-use changes in the study area from the early 1900s to 1960 and from 1960 to 1990. We use GIS to perform a biodiversity gap analysis of the protected areas in the study site. We produce a detailed map of existing floristic types and use it to generate layers corresponding to floristic species …


082313333253 Alamat Apotik Jual Obat Tidur / Bius Di Bulukumba, Toko Afeng Obat Kuat Bogor Nov 1997

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Obat Bius Asli Di Bali Wa: 0856 4702 0096 Tempat Jual Obat Bius Asli Di Bali, Toko Aborsi Nov 1997

Obat Bius Asli Di Bali Wa: 0856 4702 0096 Tempat Jual Obat Bius Asli Di Bali, Toko Aborsi

Toko Aborsi

Obat Bius Liquid Sex Cair merupakan produk terbaik dengan khasiat cepat dan heebat dengan cara kerja membuat target yang di inginkan pingsan atau tertidur pulas selama beberapa menit. Liquid Sex Cair yang sudah teruji kualitas nya ini bentuknya adalah cair, dengan cara kerja cepat yang akan membuat wanita yang di jadikan korban langsung pingsan seketika. Sebagai toko online, Jual Obat Bius Liquid Sex Cair kami menawarkan produk terbaik dengan kualitas yang sudah teruji serta aman digunakan. Karena memang produk terbaik dengan kualitas hebat tanpa menimbulkan efek samping berbahaya bagi kesehatan tubuh.
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Reinvigorating Introductory Biology: A Theme-Based, Investigative Approach To Teaching Biology Majors, Cynthia Norton, Lynne H. Gildensoph, Martha Phillips, Deborah Wygal, Kurt Olson, John Pellegrini, Kathleen Tweeten Oct 1997

Reinvigorating Introductory Biology: A Theme-Based, Investigative Approach To Teaching Biology Majors, Cynthia Norton, Lynne H. Gildensoph, Martha Phillips, Deborah Wygal, Kurt Olson, John Pellegrini, Kathleen Tweeten

Kurt Olson

No abstract provided.


Sequential Expression Of Egr-1 And Egr-3 In Hippocampal Granule Cells Following Electroconvulsive Stimulation, Kevin O'Donovan Oct 1997

Sequential Expression Of Egr-1 And Egr-3 In Hippocampal Granule Cells Following Electroconvulsive Stimulation, Kevin O'Donovan

Kevin O'Donovan

No abstract provided.


Spiroplasma Lineolae Sp. Nov., From The Horsefly Tabanus Lineola (Diptera : Tabanidae), Frank E. French, Robert F. Whitcomb, Joseph G. Tully, Patricia Carle, Joseph M. Bové, Roberta B. Henegar, Jean R. Adams, Gail E. Gasparich, David L. Williamson Sep 1997

Spiroplasma Lineolae Sp. Nov., From The Horsefly Tabanus Lineola (Diptera : Tabanidae), Frank E. French, Robert F. Whitcomb, Joseph G. Tully, Patricia Carle, Joseph M. Bové, Roberta B. Henegar, Jean R. Adams, Gail E. Gasparich, David L. Williamson

Gail Gasparich

Spiroplasma strain TALS-2T from the viscera of the striped horsefly, Tabanus lineola, collected in Georgia was serologically distinct from other Spiroplasma species, groups, putative groups, and subgroups. Light and electron microscopy of cells of strain TALS-2T revealed helical motile cells surrounded only by a single cytoplasmic membrane. The organism grew in M1D and SP-4 liquid media. Growth also occurred in 1% serum fraction medium and in conventional horse serum medium. Growth in liquid media was serum dependent. The strain passed through 220-nm filter pores, but was retained in filters with 100-nm pores. The optimum temperature for growth was 30°C. Multiplication …


Collaborative Roles For C-Jun N-Terminal Kinase, C-Jun, Serum Response Factor, And Sp1 In Calcium-Regulated Myocardial Gene Expression, Patrick M. Mcdonough, Deanna S. Hanford, Amy B. Sprenkle, Noel R. Mellon, Christopher C. Glembotski Sep 1997

Collaborative Roles For C-Jun N-Terminal Kinase, C-Jun, Serum Response Factor, And Sp1 In Calcium-Regulated Myocardial Gene Expression, Patrick M. Mcdonough, Deanna S. Hanford, Amy B. Sprenkle, Noel R. Mellon, Christopher C. Glembotski

Amy Sprenkle

Electrical stimulation of contractions (pacing) of primary neonatal rat ventricular myocytes increases intracellular calcium and activates a hypertrophic growth program that includes expression of the cardiac-specific gene, atrial natriuretic factor (ANF). To investigate the mechanism whereby pacing increases ANF, pacing was tested for its ability to regulate mitogen-activated protein kinase family members, ANF promoter activity, and the trans-activation domain of the transcription factor, Sp1. Pacing and the calcium channel agonist BAYK 8644 activated c-Jun N-terminal kinase (JNK) but not extracellular signal-regulated kinase. Pacing stimulated ANF-promoter activity approximately 10-fold. Furthermore, transfection with an expression vector for c-Jun, a substrate for JNK, …


082313333253 Toko Jual Minyak Lintah Papua Asli Di Depok, Klinik 04 Sep 1997

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He Who Has Seen The Wind: The Black Bonspiel Of Willie Maccrimmon, Don Morrow Jul 1997

He Who Has Seen The Wind: The Black Bonspiel Of Willie Maccrimmon, Don Morrow

Donald Morrow

No abstract provided.


Cloning And Conservation Of Biological Diversity: Paradox, Panacea, Or Pandora's Box?, Shaily Menon, Kamaljit Bawa, Leah Gorman Jul 1997

Cloning And Conservation Of Biological Diversity: Paradox, Panacea, Or Pandora's Box?, Shaily Menon, Kamaljit Bawa, Leah Gorman

Shaily Menon

The success of a Scottish team in cloning a mammal from an adult tissue cell has generated considerable speculation in the popular press about potential applications to conservation biology. Possibilities that have been mentioned include cloning endangered species and creating gene banks for the germplasm of rare species. Sensational or inaccurate reports might encourage the mistaken notion that cloning technology is more advanced or reliable than it actually is. More important, such reports might foster the myth that there is no longer an urgency to conserve endangered species or their habitats as long as we have frozen germplasm and cloning …


Comparison Of Risk/Hazard Rating Systems For Mountain Pine Beetle In Black Hills Ponderosa Pine Forests, Judith Pasek, Thomas Juntti Jul 1997

Comparison Of Risk/Hazard Rating Systems For Mountain Pine Beetle In Black Hills Ponderosa Pine Forests, Judith Pasek, Thomas Juntti

Judith E Pasek

Risk/hazard rating methods for mountain pine beetle (MPB) in ponderosa pine stands were compared, based upon number of stands and acres that rated as low, medium or high risk/hazard, for four recent project areas on the Black Hills National Forest. Methods compared were the (1) Stevens model described by Stevens et al. (1980) except that the basal area threshold for high susceptibility was reduced from 150 to 120 based upon results of Schmid and Mata (1992), (2) FORPLAN model used in the Draft Revised Black Hills National Forest Plan (same as Stevens model except for assumption of only one-storied stand …


Ms2 Coat Protein Mutants Which Bind Qβ Rna, Marc Spingola, David S. Peabody Jul 1997

Ms2 Coat Protein Mutants Which Bind Qβ Rna, Marc Spingola, David S. Peabody

Marc Spingola

The coat proteins of the RNA phages MS2 and Qβ are structurally homologous, yet they specifically bind different RNA structures. In an effort to identify the basis of RNA binding specificity we sought to isolate mutants that convert MS2 coat protein to the RNA binding specificity of Qβ. A library of mutations was created which selectively substitutes amino acids within the RNA binding site. Genetic selection for the ability to repress translation from the Qβ translational operator led to the isolation of several MS2 mutants that acquired binding activity for Qβ RNA. Some of these also had reduced abilities to …


Wounding-Induced Cell Wall Ph Shifts In Coleoptile Segments Of Various Poaceae, Winfried Peters Jul 1997

Wounding-Induced Cell Wall Ph Shifts In Coleoptile Segments Of Various Poaceae, Winfried Peters

Winfried S. Peters

Wounding-induced extracellular pH shifts were characterized previously in excised segments of maize (Zea mays L.) coleoptiles. In the present study it is demonstrated that similar pH shifts also occur in Triticum aestivum L., Secale cereale L., Hordeum vulgare L., Avena sativa L., Sorghum durra (Forsk.) Stapf, and Setaria italica (L.) Beauv., with characteristic quantitative differences between the species. Indole-acetic acid induces pronounced drops of the medium pH in all species except Setaria italica.


Genes That Guide Growth Cones Along The C. Elegans Ventral Nerve Cord, Bruce Wightman, Renee Baran, Gian Garriga Jun 1997

Genes That Guide Growth Cones Along The C. Elegans Ventral Nerve Cord, Bruce Wightman, Renee Baran, Gian Garriga

Renee Baran

During nervous system development, growth cone pioneering and fasciculation contribute to nerve bundle structure. Pioneer growth cones initially navigate along neuroglia to establish an axon scaffold that guides later extending growth cones. In C. elegans, the growth cone of the PVPR neuron pioneers the left ventral nerve cord bundle, providing a path for the embryonic extensions of the PVQL and AVKR growth cones. Later during larval development, the HSNL growth cone follows cues in the left ventral nerve cord bundle provided by the PVPR and PVQL axons. Here we show that mutations in the genes enu-1, fax-1, unc-3, unc-30, unc-42 …


Iaa Breakdown And Its Effect On Auxin-Induced Cell Wall Acidification In Maize Coleoptile Segments, Winfried Peters, Christa Lommel, Hubert Felle Jun 1997

Iaa Breakdown And Its Effect On Auxin-Induced Cell Wall Acidification In Maize Coleoptile Segments, Winfried Peters, Christa Lommel, Hubert Felle

Winfried S. Peters

In excised Zea mays L. coleoptiles incubated in aerated media at high fresh weight per volume ratios, indole-3-acetic acid induces transient drops of extracellular pH. Based on the quantitative dependency of the response on the initial auxin concentration we developed a novel auxin bioassay, which allows reliable estimation of IAA concentrations between 10−8.5 and 10−5 M. Using the bioassay and complementary concentration measurements by IAA fluorescence we found the transient IAA-induced pH response paralleled by a decrease of auxin activity and concentration in the medium. This decline is rapid and starts immediately upon auxin addition, and insofar differs from the …


Applications Of Geographic Information Systems, Remote-Sensing, And A Landscape Ecology Approach To Biodiversity Conservation In The Western Ghats, Shaily Menon, Kamaljit S. Bawa Jun 1997

Applications Of Geographic Information Systems, Remote-Sensing, And A Landscape Ecology Approach To Biodiversity Conservation In The Western Ghats, Shaily Menon, Kamaljit S. Bawa

Shaily Menon

The mountains along the west coast of peninsular India, the Western Ghats, constitute one of the unique biological regions of the world. Rapidly occurring land-cover and land-use change in the Western Ghats has serious implications for the biodiversity of the region. Both landscape changes as well as the distribution of biodiversity are phenomena with strong spatial correlates. Recent developments in remote-sensing technology and Geographic Information Systems (GIS) allow the use of a landscape ecology and spatial analysis approach to the problem of deforestation and biodiversity conservation in the Western Ghats. Applications of this approach include analyses of land-cover and land-use …


Spiroplasma Chrysopicola Sp. Nov., Spiroplasma Gladiatoris Sp. Nov., Spiroplasma Helicoides Sp. Nov., And Spiroplasma Tabanidicola Sp. Nov., From Tabanid (Diptera: Tabanidae) Flies, Robert F. Whitcomb, Frank E. French, Joseph G. Tully, Gail E. Gasparich, David L. Rose, Patricia Carle, Joseph M. Bove, Roberta B. Henegar, Meghnad Konai, Kevin J. Hackett, Jean R. Adams, Truman B. Clark, David L. Williamson Jun 1997

Spiroplasma Chrysopicola Sp. Nov., Spiroplasma Gladiatoris Sp. Nov., Spiroplasma Helicoides Sp. Nov., And Spiroplasma Tabanidicola Sp. Nov., From Tabanid (Diptera: Tabanidae) Flies, Robert F. Whitcomb, Frank E. French, Joseph G. Tully, Gail E. Gasparich, David L. Rose, Patricia Carle, Joseph M. Bove, Roberta B. Henegar, Meghnad Konai, Kevin J. Hackett, Jean R. Adams, Truman B. Clark, David L. Williamson

Gail Gasparich

Four spiroplasma strains, DF-1T, TG-1T, TABS-2T, and TAUS-1T, all of which were isolated from deerflies or horseflies (Diptera: Tabanidae), were serologically distinct from previously described spiroplasma species, groups, and subgroups. Strain DF-1Toriginated from a Maryland deerfly (Chrysops sp.); strain TG-1Twas isolated from a Maryland horsefly (Tabanus gladiator); strain TAUS-1Toriginated from a member of the Tabanus abdominalis-limbatinevris complex of horseflies collected in Maryland; and strain TABS-2Twas isolated from a horsefly (Tabanus abactor) collected in Oklahoma. Cells of all of the strains appeared to be helical and motile when they were examined by dark-field microscopy. Cells of strain DF-1Tgrowing in M1D medium …


Thermodynamics Of Oligoarginines Binding To Rna And Dna., David Mascotti, Timothy Lohman Jun 1997

Thermodynamics Of Oligoarginines Binding To Rna And Dna., David Mascotti, Timothy Lohman

David P. Mascotti

These results suggest that hydrogen bonding of arginine to the phosphate backbone of the nucleic acids contributes to the increased stability of these complexes.


Bruce Kidd’S The Struggle For Canadian Sport, Don Morrow Apr 1997

Bruce Kidd’S The Struggle For Canadian Sport, Don Morrow

Donald Morrow

No abstract provided.


Ac-Mode Atomic Force Microscope Imaging In Air And Solutions With A Thermally Driven Bimetallic Cantilever Probe, Andrew C. Hillier, Allen J. Bard Apr 1997

Ac-Mode Atomic Force Microscope Imaging In Air And Solutions With A Thermally Driven Bimetallic Cantilever Probe, Andrew C. Hillier, Allen J. Bard

Andrew C. Hillier

An ac imaging mode for atomic force microscopy ~AFM! has been developed that employs a thermally driven bimetallic cantilever to sense surface topography. Oscillations are induced in a composite cantilever, comprising a Si3N4 layer and Au overcoat, by local heating with a resistive wire heater placed in close proximity to the cantilever. Cantilever bending occurs upon heating due to the difference in thermal expansion coefficients of the Si3N4 and Au layers. The magnitude of this bending is a function of the heat input, the cantilever geometry, the frequency of the excitation, and the thermal properties of the surrounding medium. A …


The Determination Of Relative Elemental Growth Rate Profiles From Segmental Growth Rates (A Methodological Evaluation), Winfried Peters, Nirit Bernstein Mar 1997

The Determination Of Relative Elemental Growth Rate Profiles From Segmental Growth Rates (A Methodological Evaluation), Winfried Peters, Nirit Bernstein

Winfried S. Peters

Relative elemental growth rate (REGR) profiles describe spatial patterns of growth intensity; they are indispensable for causal growth analyses. Published methods of REGR profile determination from marking experiments fall in two classes: the profile is either described by a series of segmental growth rates, or calculated as the slope of a function describing the displacement velocities of points along the organ. The latter technique is usually considered superior for theoretical reasons, but to our knowledge, no comparative methodological study of the two approaches is currently available. We formulated a model REGR profile that resembles those reported from primary roots. We …


Emergence And Overwintering Brood Of Douglas-Fir Beetle Eight Years After The Clover Mist Fire On The Clarks Fork Ranger District, Shoshone National Forest, Wyoming, Kurt K. Allen Mar 1997

Emergence And Overwintering Brood Of Douglas-Fir Beetle Eight Years After The Clover Mist Fire On The Clarks Fork Ranger District, Shoshone National Forest, Wyoming, Kurt K. Allen

Judith E Pasek

The Douglas-fir beetle outbreak on the Shoshone National Forest is evaluated for the eighth consecutive year. Adult emergence in 1996 showed a single peak. Overwintering brood in 1996 were used to predict population levels for 1997. Brood levels declined from 1995 but 81% of the overwintering brood are adults. Damage levels (number of trees killed) was at its lowest point in the last 7 years, a 4.5 fold decline from 1995. Brood counts indicate a steady or slight increase in beetle populations; however, in most areas suitable host trees are becoming scarce.

Management alternatives include salvage and sanitation, tree baiting, …


The Cold Shock Domain Protein Lin-28 Controls Developmental Timing In C. Elegans And Is Regulated By The Lin-4 Rna, Eric Moss, Rosalind Lee, Victor Ambros Mar 1997

The Cold Shock Domain Protein Lin-28 Controls Developmental Timing In C. Elegans And Is Regulated By The Lin-4 Rna, Eric Moss, Rosalind Lee, Victor Ambros

Victor R. Ambros

Mutations in the heterochronic gene lin-28 of C. elegans cause precocious development where diverse events specific to the second larval stage are skipped. lin-28 encodes a cytoplasmic protein with a cold shock domain and retroviral-type (CCHC) zinc finger motifs, consistent with a role for LIN-28 in posttranscriptional regulation. The 3'UTR of lin-28 contains a conserved element that is complementary to the 22 nt regulatory RNA product of lin-4 and that resembles seven such elements in the 3'UTR of the heterochronic gene lin-14. Both lin-4 activity and the lin-4-complementary element (LCE) are necessary for stage-specific regulation of lin-28. Deleting the LCE …


Strategies, Policy Approaches, And Resources For Local Food System Planning And Organizing, Kenneth Dahlberg, Kate Clancy, Robert L. Wilson, Jan O'Donnell Jan 1997

Strategies, Policy Approaches, And Resources For Local Food System Planning And Organizing, Kenneth Dahlberg, Kate Clancy, Robert L. Wilson, Jan O'Donnell

Kenneth Dahlberg

No abstract provided.


The Role Of Molecular Recognition In Activation And Regulation In The Growth Hormone-Prolactin Family Of Hormones And Receptors, Anthony Kossiakoff, Celia Schiffer, Abraham De Vos Dec 1996

The Role Of Molecular Recognition In Activation And Regulation In The Growth Hormone-Prolactin Family Of Hormones And Receptors, Anthony Kossiakoff, Celia Schiffer, Abraham De Vos

Celia A. Schiffer

In: Rick L. Ornstein, Biomacromolecules--from 3-D to applications: Thirty-fourth Hanford Symposium on Health and the Environment, October 23-26, 1995, Pasco, Washington, U.S.A. Battelle Press, 1997, p. 123-131. ISBN 1574770195, 9781574770193.


Diet Of Nestling Laughing Gulls In Southern New Jersey, Jerald Dosch Dec 1996

Diet Of Nestling Laughing Gulls In Southern New Jersey, Jerald Dosch

Jerald Dosch, PhD

No abstract provided.


Population Thinking And Tree Thinking In Systematics, Robert O’Hara Dec 1996

Population Thinking And Tree Thinking In Systematics, Robert O’Hara

Robert J. O’Hara

Two new modes of thinking have spread through systematics in the twentieth century. Both have deep historical roots, but they have been widely accepted only during this century. Population thinking overtook the field in the early part of the century, culminating in the full development of population systematics in the 1930s and 1940s, and the subsequent growth of the entire field of population biology. Population thinking rejects the idea that each species has a natural type (as the earlier essentialist view had assumed), and instead sees every species as a varying population of interbreeding individuals. Tree thinking has spread through …


Involvement Of The Ras-Like Gtpase Rab3d In Rbl-2h3 Mast Cell Exocytosis Following Stimulation Via High Affinity Ige Receptors (Fcεri), Michele Roa, Fabienne Paumet, Joelle Le Mao, Bernard David, Ulrich Blank Dec 1996

Involvement Of The Ras-Like Gtpase Rab3d In Rbl-2h3 Mast Cell Exocytosis Following Stimulation Via High Affinity Ige Receptors (Fcεri), Michele Roa, Fabienne Paumet, Joelle Le Mao, Bernard David, Ulrich Blank

Fabienne Paumet

No abstract provided.


Wrestling John Irving, Don Morrow Dec 1996

Wrestling John Irving, Don Morrow

Donald Morrow

No abstract provided.


Status Of A Shallow Seagrass System, Geographe Bay, South-Western Australia, Kathryn Mcmahon, E Young, S Montgomery, J Cosgrove, J Wilshaw, D Walker Dec 1996

Status Of A Shallow Seagrass System, Geographe Bay, South-Western Australia, Kathryn Mcmahon, E Young, S Montgomery, J Cosgrove, J Wilshaw, D Walker

Kathryn McMahon

No abstract provided.