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1000 tulosta hakusanalla Louis F. Middlebrook

Cohomology Rings of Finite Groups

Cohomology Rings of Finite Groups

Jon F. Carlson; L. Townsley; Luís Valero-Elizondo

Springer
2010
nidottu
Group cohomology has a rich history that goes back a century or more. Its origins are rooted in investigations of group theory and num­ ber theory, and it grew into an integral component of algebraic topology. In the last thirty years, group cohomology has developed a powerful con­ nection with finite group representations. Unlike the early applications which were primarily concerned with cohomology in low degrees, the in­ teractions with representation theory involve cohomology rings and the geometry of spectra over these rings. It is this connection to represen­ tation theory that we take as our primary motivation for this book. The book consists of two separate pieces. Chronologically, the first part was the computer calculations of the mod-2 cohomology rings of the groups whose orders divide 64. The ideas and the programs for the calculations were developed over the last 10 years. Several new features were added over the course of that time. We had originally planned to include only a brief introduction to the calculations. However, we were persuaded to produce a more substantial text that would include in greater detail the concepts that are the subject of the calculations and are the source of some of the motivating conjectures for the com­ putations. We have gathered together many of the results and ideas that are the focus of the calculations from throughout the mathematical literature.
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The Illinois Soil Experiment Fields

The Illinois Soil Experiment Fields

F. C. (Frederick Charles) 1886- Bauer; Raymond Stratton 1880- Smith; L. H. (Louie Henrie) 1872- Smith

Hassell Street Press
2021
sidottu
This work has been selected by scholars as being culturally important and is part of the knowledge base of civilization as we know it.This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work.Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. To ensure a quality reading experience, this work has been proofread and republished using a format that seamlessly blends the original graphical elements with text in an easy-to-read typeface.We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
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The Illinois Soil Experiment Fields

The Illinois Soil Experiment Fields

F. C. (Frederick Charles) 1886- Bauer; Raymond Stratton 1880- Smith; L. H. (Louie Henrie) 1872- Smith

Hassell Street Press
2021
nidottu
This work has been selected by scholars as being culturally important and is part of the knowledge base of civilization as we know it.This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work.Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. To ensure a quality reading experience, this work has been proofread and republished using a format that seamlessly blends the original graphical elements with text in an easy-to-read typeface.We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
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The Geoarchaeology of Lake Michigan Coastal Dunes

The Geoarchaeology of Lake Michigan Coastal Dunes

William A. Lovis; Alan F. Arbogast; G. William Monaghan

Michigan State University Press
2012
pokkari
Complex sets of environmental factors have interacted over the past 5,000 years to affect how changes in climate, temperature, relative precipitation, and the levels of Lake Michigan influence the preservation of archaeological sites in coastal sand dunes along Lake Michigan. As a collaboration between earth scientists, archaeologists, and geoarchaeologists, this study draws on a wealth of research and multidisciplinary insights to explore the conditions necessary to safeguard ancient human settlements in these landscapes. A variety of contemporary and innovative techniques, including numerous dating methods and approaches, were employed to determine when and for how long sand dunes were active and when and for how long archaeological sites were occupied. Knowledge of dune processes and settlement patterns not only affects archaeological interpretations, but it is also consummately important to land planners responsible for managing heritage archaeological sites in the Lake Michigan coastal zone.
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Neurobiological Mechanisms of Opiate Withdrawal

Neurobiological Mechanisms of Opiate Withdrawal

Rafael Maldonado; Luis Stinus; George F. Koob

Springer-Verlag Berlin and Heidelberg GmbH Co. K
2013
nidottu
Some general aspects of opiate dependence are described in a first section including a brief historical description and an explanation of the different models currently used to investigate opiate dependence. The neurobiological bases of opiate withdrawal are detailed in a second section, which particularly emphasizes the neurophysiological adaptative changes, the processes of homologous and heterologous regulation, and the role played by different brain structures and several endogenous peptides acting as antiopiates. The last part reports several basic aspects more directly related to the clinical perspectives of opiate dependence, such as the new expectations in the treatment of opiate withdrawal or the relationships between sensitization, tolerance and withdrawal.
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Evaluación de la sensibilidad al Cadmio y Plomo en algas del suelo

Evaluación de la sensibilidad al Cadmio y Plomo en algas del suelo

Alejandra Narváez Vallejo; Luis Carlos Montenegro; Diana F Vera

Editorial Academica Espanola
2018
pokkari
Este estudio presenta la toxicidad de los metales pesados cadmio y plomo en Chlorella vulgaris usando un ensayo est tico de 96h, revelado en la inhibici n del crecimiento y las variaciones en el volumen celular. La pruebas se realizaron con una concentraci n de 1.23mg/l de EDTA porque se observaron efectos adversos en el crecimiento en ausencia de este. Bajo las condiciones del estudio el alga mostr ser mucho m s sensible al cadmio que al plomo con una CI50 de 0.6mg/L y superior a 62.6 mg/L respectivamente. El volumen celular aument con el incremento en las concentraciones en ambos metales mostrando la gran sensibilidad de membrana a la acci n de estos metales. Sin embargo, no se vio respuesta del volumen en 42.51 y 4.25 mg/L de Cd por lo que se cree debe existir alg n mecanismo inhibitorio o un blanco de los metales que esta siendo m s afectado que la membrana. Se plantea adem s que con el aumento en volumen hay un incremento en la superficie de adsorci n y de esta forma existe un efecto indirecto para enfrentar la toxicidad a los metales. De acuerdo con lo anterior se considera al volumen como un excelente indicador de la toxicidad generada por el Cd y el Pb.
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Lessons from NAFTA

Lessons from NAFTA

Daniel Lederman; William F. Maloney; Luis Servén

Stanford University Press
2004
sidottu
Analyzing the experience of Mexico under the North American Free Trade Agreement (NAFTA), the authors draw lessons for other countries considering free trade agreements with the United States. The authors conclude that NAFTA raised external trade and foreign investment inflows and had a modest effect on Mexico's average income per person. It is likely that NAFTA also helped achieve a modest reduction in poverty and an improvement in job quality. However, major obstacles remain to Mexico's long term development-NAFTA is not enough. The main lesson for other countries is that free trade agreements offer opportunities to accelerate economic growth, but do not guarantee it.
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Lessons from NAFTA

Lessons from NAFTA

Daniel Lederman; William F. Maloney; Luis Servén

Stanford University Press
2004
pokkari
Analyzing the experience of Mexico under the North American Free Trade Agreement (NAFTA), the authors draw lessons for other countries considering free trade agreements with the United States. The authors conclude that NAFTA raised external trade and foreign investment inflows and had a modest effect on Mexico's average income per person. It is likely that NAFTA also helped achieve a modest reduction in poverty and an improvement in job quality. However, major obstacles remain to Mexico's long term development-NAFTA is not enough. The main lesson for other countries is that free trade agreements offer opportunities to accelerate economic growth, but do not guarantee it.
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Reactividad Del Grupo Amino Del 1-(p-aminofenil)-2,5-dimetilpirrol

Reactividad Del Grupo Amino Del 1-(p-aminofenil)-2,5-dimetilpirrol

Antonia del Rocío López Guemez; Luis Fernando Roa de la F; Dora María Frías Márquez

Editorial Academica Espanola
2018
pokkari
En este trabajo se describe la s ntesis y exploraci n de la reactividad del grupo amino del 1-(p-aminofenil)-2,5-dimetilpirrol. Se observ que ste compuesto no participa en reacciones de formaci n de azocompuestos ni en reacciones del tipo aza Michael, pero si lo hace en reacciones de sustituci n nucleof lica en el acilo y en reacciones de formaci n de una imina. Su baja reactividad se atribuye a la poca nucleofilia disminuida por los efectos estereoelectr nicos del mismo (impedimento est rico, efectos inductivo y resonante). Se emple para la caracterizaci n de todos los productos de reacci n la espectroscop a de infrarrojo, resonancia magn tica nuclear de prot n y resonancia magn tica nuclear de carbono. En el caso de los productos cristalinos se le confirm la estructura por difracci n de rayos X de monocristal.
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