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1996

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Full-Text Articles in Life Sciences

Following Form And Function: A Philosophical Archaeology Of Life Science, Stephen Asma Dec 1996

Following Form And Function: A Philosophical Archaeology Of Life Science, Stephen Asma

Stephen T Asma

No abstract provided.

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The Rna-Binding Site Of Bacteriophage Qβ Coat Protein, Francis Lim, Marc Spingola, David S. Peabody Dec 1996

The Rna-Binding Site Of Bacteriophage Qβ Coat Protein, Francis Lim, Marc Spingola, David S. Peabody

Marc Spingola

The coat proteins of the RNA bacteriophages Qβ and MS2 are specific RNA binding proteins. Although they possess common tertiary structures, they bind different RNA stem loops and thus provide useful models of specific protein-RNA recognition. Although the RNA-binding site of MS2 coat protein has been extensively characterized previously, little is known about Qβ. Here we describe the isolation of mutants that define the RNA-binding site of Qβ coat protein, showing that, as with MS2, it resides on the surface of a large β-sheet. Mutations are also described that convert Qβ coat protein to the RNA binding specificity of MS2. …

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What Is Nerotenze?, Juvent Us Oct 1996

What Is Nerotenze?, Juvent Us

juvent us

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Taxonomic Status Of The Enigmatic Cryptotis Avia (Mammalia: Insectivora: Soricidae), With Comments On The Distribution Of The Colombian Small-Eared Shrew, Cryptotis Colombiana, Neal Woodman Oct 1996

Taxonomic Status Of The Enigmatic Cryptotis Avia (Mammalia: Insectivora: Soricidae), With Comments On The Distribution Of The Colombian Small-Eared Shrew, Cryptotis Colombiana, Neal Woodman

Neal Woodman

Cryptotis avia G. M. Allen 1823, from the Eastern Andean Cordillera of Colombia, is a small-eared shrew previously known from, at most, five specimens. Review of the holotype, consisting of an understuffed skin and a partial skull, and three potential topotypes indicates that they are refereable to Cryptotis thomasi Merriam, 1897, and C. avia should be considered ajunior synonym of that name. Cryptotis thomasi is restricted to highlands around Bogotá in the Eastern Cordillera. Another specimen previously referred to C. avia is the second known specimen of Cryptotis colombiana Woodman & Timm 1993. This second record expands the known distribution …

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082313333253 Toko Jual Minyak Lintah Papua Asli Di Tarakan By Viagra Usa, Klinik 04 Sep 1996

082313333253 Toko Jual Minyak Lintah Papua Asli Di Tarakan By Viagra Usa, Klinik 04

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The Epidermis Still In Control?, Winfried Peters, A. Tomos Aug 1996

The Epidermis Still In Control?, Winfried Peters, A. Tomos

Winfried S. Peters

This paper has no abstract; these are the first two paragraphs. The search for a molecular mechanism of auxin action has rendered the “Auxin-Binding-Protein 1” (ABP-1) the top candidate for a functional auxin receptor (Venis and Napier, 1995), although its status remains disputed (Jones, 1994; Hertel, 1995; Napier, 1995; Venis, 1995). ABP-1 had long been thought to be localized exclusively in epidermal cells in coleoptiles (Löbler and Klämbt, 1985), and thus had fitted nicely the “epidermal-growth-control-hypothesis” (Kutschera, 1987, 1992). The recent report from the same lab of its uniform distribution throughout the coleoptile (Kayser and Klämbt, 1995) not only rises …

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Emergence And Overwintering Brood Of Douglas-Fir Beetle Seven Years After The Clover Mist Fire On The Clarks Fork Ranger District, Shoshone National Forest, Wyoming, Judith E. Pasek Aug 1996

Emergence And Overwintering Brood Of Douglas-Fir Beetle Seven Years After The Clover Mist Fire On The Clarks Fork Ranger District, Shoshone National Forest, Wyoming, Judith E. Pasek

Judith E Pasek

Emergence patterns and population levels of Douglas-fir beetles (DFB), Dendroctonus pseudotsugae Hopkins, in the seventh year of infestation following the Clover Mist Fire were evaluated on the Clarks Fork Ranger District of the Shoshone National Forest. Adult emergence in 1995 returned to a single peak beginning in mid-June, about a week later than normal likely due to cold, wet spring weather. Adults of both the '93-'94 and '94-'95 generations emerged, demonstrating for the second year in a row that DFB can extend its life cycle up to two years. Almost half of the total emergence of the '93-'94 generation was …

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Improved Cultivation Systems For Isolation Of The Colorado Potato Beetle Spiroplasma., Meghnad Konai, K. J. Hackett, D. L. Williamson, J. J. Lipa, J. D. Pollack, G. E. Gasparich, E. A. Clark, D. C. Vacek, R. F. Whitcomb Aug 1996

Improved Cultivation Systems For Isolation Of The Colorado Potato Beetle Spiroplasma., Meghnad Konai, K. J. Hackett, D. L. Williamson, J. J. Lipa, J. D. Pollack, G. E. Gasparich, E. A. Clark, D. C. Vacek, R. F. Whitcomb

Gail Gasparich

In North America, the Colorado potato beetle, Leptinotarsa decemlineata, is often infected with the host-specific, gut-inhabiting Colorado potato beetle spiroplasma (CPBS). CPBS is apparently a commensal, but it may be useful in biocontrol if it can be transformed to express an insect-lethal gene. Difficulty in cultivating the organism, however, has hindered the development of a suitable transformation system. In this study, we eliminated the need for coculturing CPBS with insect cells. CPBS was reliably isolated with the BBL Anaerobic GasPak Jar system (low redox, enhanced CO(inf2)), which was easier to use and less expensive than insect cell coculture methods. A …

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Reversal Of Cell Fate Determination In Caenorhabditis Elegans Vulval Development, Susan Euling, Victor Ambros Jul 1996

Reversal Of Cell Fate Determination In Caenorhabditis Elegans Vulval Development, Susan Euling, Victor Ambros

Victor R. Ambros

In Caenorhabditis elegans, the fates of the multipotent vulval precursor cells (VPCs) are specified by intercellular signals. The VPCs divide in the third larval stage (L3) of the wild type, producing progeny of determined cell types. In lin-28 mutants, vulva development is similar to wild-type vulva development except that it occurs precociously, in the second larval stage (L2). Consequently, when lin-28 hermaphrodites temporarily arrest development at the end of L2 in the dauer larva stage, they have partially developed vulvae consisting of VPC progeny. During post-dauer development, these otherwise determined VPC progeny become reprogrammed back to the multipotent, signal-sensitive state …

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Wrestling John Irving, Don Morrow Jul 1996

Wrestling John Irving, Don Morrow

Donald Morrow

No abstract provided.

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Pollen Dispersal In Low-Density Populations Of Three Neotropical Tree Species, E. A. Stacy, J. L. Hamrick, J. D. Nason, S. P. Hubbell, R. B. Foster, R. Condit Jul 1996

Pollen Dispersal In Low-Density Populations Of Three Neotropical Tree Species, E. A. Stacy, J. L. Hamrick, J. D. Nason, S. P. Hubbell, R. B. Foster, R. Condit

John Nason

Studies of mating patterns of tropical trees, typically involving common species, have revealed that most species are outcrossed and that, in some cases, a significant fraction of outcross pollen moves long distances. We evaluated mating systems and effective pollen dispersal for three hermaphroditic, insect-pollinated Neotropical tree species, Calophyllum longifolium, Spondias mombin, and Turpinia occidentalis, all of which occurred at low adult densities at the study site. Mating patterns were estimated for each maternal tree within 84-ha populations of C. longifolium and S. mombin in 1992 and 1993 and within a 50-ha population of T. occidentalis in 1993. Each population was …

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Oxidized Low Density Lipoprotein And Lysophosphatidylcholine Stimulate Cell Cycle Entry In Vascular Smooth Muscle Cells - Evidence For Release Of Fibroblast Growth Factor-2., Yuh-Cherng Chai, Philip Howe, Paul Dicorletto, Guy Chisolm Jul 1996

Oxidized Low Density Lipoprotein And Lysophosphatidylcholine Stimulate Cell Cycle Entry In Vascular Smooth Muscle Cells - Evidence For Release Of Fibroblast Growth Factor-2., Yuh-Cherng Chai, Philip Howe, Paul Dicorletto, Guy Chisolm

Yuh-Cherng Chai

We have previously shown that oxidized low density lipoprotein (LDL) but not native LDL stimulated DNA synthesis in cultured smooth muscle cells (SMC) and that α-tocopherol (vitamin E) inhibited this proliferative response (Lafont, A., Chai, Y. C., Cornhill, J. F., Whitlow, P. L., Howe, P. H., and Chisolm, G. M. (1995) J. Clin. Invest. 95, 1018-1025). The moiety of oxidized LDL that stimulates DNA synthesis and the cellular mechanism for this potentially mitogenic effect are not known. We now report that lipid fractions containing lysophospholipids from oxidized LDL or phospholipase A2-treated native LDL stimulated SMC DNA synthesis as did palmitoyl …

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Developmental And Tissue-Specific Expression Of Mouse Pelle-Like Protein Kinase, Marina Trofimova, Amy B. Sprenkle, Melissa Green, Thomas W. Sturgill, Mark G. Goebl, Maureen A. Harrington Jul 1996

Developmental And Tissue-Specific Expression Of Mouse Pelle-Like Protein Kinase, Marina Trofimova, Amy B. Sprenkle, Melissa Green, Thomas W. Sturgill, Mark G. Goebl, Maureen A. Harrington

Amy Sprenkle

The NF-kappaB/c-Rel proteins are a family of evolutionarily conserved transcription factors activated during development that in the adult, mediate many processes including the immune response. A high degree of sequence similarity is shared between the NF-kappaB/c-Rel family of transcription factors and the Drosophila Dorsal protein as well as between its cytoplasmic inhibitor, IkappaBalpha, and the Drosophila Cactus protein. Genetic analyses of Dorsal have defined components of a signaling pathway for Dorsal activation, including a serine/threonine kinase, Pelle, placed upstream of Dorsal and Cactus. We demonstrate that this pathway is likely to be conserved in mammals by the isolation of a …

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Pseudomonas Aeruginosa And Epithelial Permeability: Role Of Virulence Factors Elastase And Exotoxin A., Ali Azghani Jun 1996

Pseudomonas Aeruginosa And Epithelial Permeability: Role Of Virulence Factors Elastase And Exotoxin A., Ali Azghani

Ali Azghani

Lung injury in bacterial infection is a multifactorial phenomenon that involves bacterial metabolites and host factors. Primary isolates of type II pneumocytes and established cultures of Madin-Darby canine kidney (MDCK) cells were used to study effects of Pseudomonas aeruginosa exoproducts on epithelial paracellular permeability. The results indicate that elastase (PE) and exotoxin A (Exo A) have different, but complementary, actions that diminish epithelial barrier function. We measured transepithelial electrical resistance (TER) and permeability coefficient for mannitol (Pm) across cell monolayers plated on tissue culture membranes. Application of 100 ng/ml of Exo A to the basal side decreased TER from 1,405 …

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The History Of Tissue Tension, Winfried S. Peters, A. Deri Tomos Jun 1996

The History Of Tissue Tension, Winfried S. Peters, A. Deri Tomos

Winfried S. Peters

In recent years the phenomenon of tissue tension and its functional connection to elongation growth has regained much interest. In the present study we reconstruct older models of mechanical inhomogenities in growing plant organs, in order to establish an accurate historical background for the current discussion. We focus on the iatromechanic model developed in Stephen Hales' Vegetable Staticks, Wilhelm Hofmeister's mechanical model of negative geotropism, Julius Sachs' explanation of the development of tissue tension, and the differential-auxin-response-hypothesis by Kenneth Thimann and Charles Schneider. Each of these models is considered in the context of its respective historic and theoretical environment. …

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Wa: 082313333253 Alamat Apotik Jual Obat Tidur / Bius Di Gorontalo, Toko Afeng Obat Kuat Bogor May 1996

Wa: 082313333253 Alamat Apotik Jual Obat Tidur / Bius Di Gorontalo, Toko Afeng Obat Kuat Bogor

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Obat Bius Asli Di Gresik Wa: 0856 4702 0096, Toko Amanah May 1996

Obat Bius Asli Di Gresik Wa: 0856 4702 0096, Toko Amanah

Toko Amanah

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Bottle_Barbarian Xl Testosterone Booster Reviews !Alt.Png, Barbarian Mason May 1996

Bottle_Barbarian Xl Testosterone Booster Reviews !Alt.Png, Barbarian Mason

Barbarian Mason

No compelling reason to go anyplace and squander cash on such exorbitant medicines. To accomplish the best outcomes you simply need to take this testosterone promoter every day, as recommended beneath in this article. Barbarian XL Testosterone Booster is a dietary enhancement that builds testosterone levels in a characteristic manner. Its recipe utilizes a concentrate, among different fixings, from the Boswellia tree tar. It is utilized broadly in medication however the organization behind the enhancement claims it likewise has astonishing advantages of boosting testosterone. Another significant fixing, which is an outstanding Spanish fly, is Tongkat Ali has been incorporated into …

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Frozen Festivals: Ceremony And The Carnaval In The Montreal Winter Carnivals During The 1880s, Don Morrow Apr 1996

Frozen Festivals: Ceremony And The Carnaval In The Montreal Winter Carnivals During The 1880s, Don Morrow

Donald Morrow

No abstract provided.

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Preparative Separation Of Pyrrolizidine Alkaloids By High-Speed Counter-Current Chromatography, Roland A. Cooper, Rion J. Bowers, Carla J. Beckham, Ryan J. Huxtable Apr 1996

Preparative Separation Of Pyrrolizidine Alkaloids By High-Speed Counter-Current Chromatography, Roland A. Cooper, Rion J. Bowers, Carla J. Beckham, Ryan J. Huxtable

Roland A. Cooper

We have applied a high-speed counter-current chromatography (CCC) technique to the separation and purification of pyrrolizidine alkaloids from Amsinckia tessellata, Symphytum spp., Trichodesma incanum (Boraginaceae), and Senecio douglasii var. longilobus (Asteraceae). Alkaloidal fractions were separated in a solvent system composed of a chloroform mobile phase and 0.2 M potassium phosphate buffer, of an optimum pH, as the stationary phase. Up to 800 mg of sample could be successfully separated in a single run, with excellent resolution of alkaloids. Lycopsamine and several of its acetylated derivatives were resolved from alkaloidal fractions of Amsinckia and Symphytum. However, diastereomeric pairs such as 7-acetyl-lycopsamine …

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Working Of Keto Buzz ?, Ketobuzz Fr Apr 1996

Working Of Keto Buzz ?, Ketobuzz Fr

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All in all, Keto Buzzis an natural and a hundred% natural method to be had at the fitness industry today which guarantees to present you rapid and healthful weight loss effects. moreover, this system no longer simplest gives you wholesome weight reduction effects however it also promotes many special fitness advantages. With the help of this formula, you don’t need to fear for too lengthy to achieve your preferred body, as it has the potential to preserve your frame in ketosis kingdom and incorporates all the ingredients that are in the main for your keto weight-reduction plan. This formula …

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Heterochronic Genes Control Cell Cycle Progress And Developmental Competence Of C. Elegans Vulva Precursor Cells, Susan Euling, Victor Ambros Mar 1996

Heterochronic Genes Control Cell Cycle Progress And Developmental Competence Of C. Elegans Vulva Precursor Cells, Susan Euling, Victor Ambros

Victor R. Ambros

Heterochronic genes control the timing of vulval development in the C. elegans hermaphrodite. lin-14 or lin-28 loss-of-function mutations cause the vulval precursor cells (VPCs) to enter S phase and to divide one larval stage earlier than in the wild type. A precocious vulva is formed by essentially normal cell lineage patterns, governed by the same intercellular signals as in the wild type. Mutations that prevent the normal developmental down-regulation of lin-14, activity delay or block VPC division and prevent vulval differentiation. A genetic pathway that includes lin-4, lin-14, and lin-28 controls when VPCs complete G1 and also controls when VPCs …

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Obat Aborsi Di Ternate Wa: 0856 4702 0096 Obat Aborsi Di Daerah Ternate, Toko Aborsi Feb 1996

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Using Www Databases In Investigative Laboratory Projects For Plant Physiology And Molecular Biology, Jonathan Monroe, I. Knight Dec 1995

Using Www Databases In Investigative Laboratory Projects For Plant Physiology And Molecular Biology, Jonathan Monroe, I. Knight

Jonathan D. Monroe

No abstract provided.

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Trees Of History In Systematics And Philology, Robert O’Hara Dec 1995

Trees Of History In Systematics And Philology, Robert O’Hara

Robert J. O’Hara

«The Natural System» is the name given to the underlying arrangement present in the diversity of life. Unlike a classification, which is made up of classes and members, a system or arrangement is an integrated whole made up of connected parts. In the pre-evolutionary period a variety of forms were proposed for the Natural System, including maps, circles, stars, and abstract multidimensional objects. The trees sketched by Darwin in the 1830s should probably be considered the first genuine evolutionary diagrams of the Natural System—the first genuine evolutionary trees. Darwin refined his image of the Natural System in the well-known evolutionary …

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Wool Production And Marketing, Raed Al-Tabini Dec 1995

Wool Production And Marketing, Raed Al-Tabini

Raed Al-Tabini

No abstract provided.

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The Nature And Significant Of Livestock Trading In The North – East Badia Of Jordan, Raed Al-Tabini, R. Oakley Dec 1995

The Nature And Significant Of Livestock Trading In The North – East Badia Of Jordan, Raed Al-Tabini, R. Oakley

Raed Al-Tabini

No abstract provided.

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Spatial Distribution And Sequential Sampling Plans For The Banded Sunflower Moth (Lepidoptera: Cochylidae) Eggs On Sunflower, C Peng, Gary Brewer Dec 1995

Spatial Distribution And Sequential Sampling Plans For The Banded Sunflower Moth (Lepidoptera: Cochylidae) Eggs On Sunflower, C Peng, Gary Brewer

Gary J. Brewer

No abstract provided.

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Frozen Festivals: Ceremony And The Carnaval In The Montreal Winter Carnivals 1883-1889, Don Morrow Dec 1995

Frozen Festivals: Ceremony And The Carnaval In The Montreal Winter Carnivals 1883-1889, Don Morrow

Donald Morrow

No abstract provided.

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Effects Of A Low-Intensity, Winter Burn On Long-Unburned Sand Pine Scrub, W. Abrahamson, J. Abrahamson Dec 1995

Effects Of A Low-Intensity, Winter Burn On Long-Unburned Sand Pine Scrub, W. Abrahamson, J. Abrahamson

Warren G. Abrahamson, II

No abstract provided.

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