Catálogo de publicaciones

Much research into financial contagion and systematic risks has been motivated by the finding that cross-market correlations (resp. coexceedances) between asset returns increase significantly during crisis periods. Is this increase due to an exogenous shock common to all markets (interdependence) or due to certain types of transmission of shocks between markets (contagion)? Darolles and Gourieroux explain that an attempt to convey contagion and causality in a static framework can be flawed due to identification problems; they provide a more precise definition of the notion of shock to strengthen the solution within a dynamic framework. This book covers the standard pracitce for defining shocks in SVAR models, impulse response functions, identitification issues, static and dynamic models, leading to the challenges of measurement of systematic risk and contagion, with interpretations of hedge fund survival and market liquidity risks

• Features the standard practice of defining shocks to models to help you to define impulse response and dynamic consequences
• Shows that identification of shocks can be solved in a dynamic framework, even within a linear perspective
• Helps you to apply the models to portfolio management, risk monitoring, and the analysis of financial stability

El herbicida más utilizado en Argentina es el N-phosphonomethylglycine (nombre comercial: Glifosato). Éste puede ser rápida y completamente degradado por los microorganismos, por lo que el tiempo de vida en el suelo es bajo. Sin embargo, el comportamiento del glifosato puede variar en función de las características físicas y químicas del suelo sobre el que se aplique. Por lo tanto, el tiempo de permanencia en el suelo podría ser mayor. Es importante estudiar el comportamiento de este herbicida dada las potenciales alteraciones que puede provocar en las comunidades de microorganismos que viven en el suelo y en algunos de sus procesos. La contaminación de los suelos no sólo está afectando su biodiversidad microbiana sino también a su fertilidad, dado que los microorganismos son fundamentales para el proceso de reciclaje de nutrientes. En este trabajo, se compararon comunidades de hongos filamentosos provenientes de suelos con y sin historia de aplicación de glifosato y se evaluó la capacidad de los hongos filamentosos en la recuperación de suelos contaminados por el herbicida glifosato. Para ello, se aislaron y caracterizaron hongos filamentosos del suelo en dos sitios con distinta historia de aplicación de glifosato utilizando dos técnicas distintas (método tradicional de lavado de muestras múltiples y siembra de partículas de suelo y el método de pirosecuenciación). Se seleccionaron cepas tolerantes a glifosato, se estudiaron los efectos del glifosato sobre los hongos luego de una aplicación puntual y se evaluó la presencia de glifosato en el suelo. Se observó que las poblaciones fúngicas del suelo varían en su composición específica y en su biomasa en suelos expuestos a glifosato en comparación con suelos sin exposición. La mayor riqueza específica y los mayores valores de ergosterol, como medida indirecta de biomasa, se obtuvieron en suelos sin historia de prácticas agrícolas. Se lograron obtener cepas tolerantes al glifosato: T. harzianum; F. oxysporum; P. lilacinus; C. didymum. Finalmente, los valores de concentración de glifosato en suelos fueron bajos y prácticamente nulos luego de 3 meses de la aplicación en la mayoría de los casos.

Contamination in Tissue Culture covers the sources, prevention, detection, and elimination of contamination in tissue culture. Composed of 12 chapters, the book describes the frequency of occurrence of contamination and the many different effects of contamination on cultured cells.
After introducing the intraspecies contamination of cell cultures, the book explains a specific type of contamination, such as bacterial, fungal, viral, and parasitic contamination. A chapter in this book describes the reversible and irreversible alterations of cultured FL human amnion cells after experimental mycoplasmal infection. Chapters 9 and 10 examine the occurrence of tissue culture contaminants by electron microscopy and procedures for isolating and identifying viral contaminants. The concluding chapter covers sterility tests of media and solutions for tissue culture and the use of antibiotics. It also summarizes the major developments made as well as future challenges in the field.
This book will be helpful to investigators, teachers, students, and technicians within the many disciplines of cell biology, physiology, cytology, virology, immunology, genetics, oncology, molecular biology, biochemistry, and biophysics, in which tissue and cell cultures are used, either as the primary object of research or as tools.

Contemporary Insect Diagnostics aids entomologists as they negotiate the expectations and potential dangers of the practice. It provides the reader with methods for networking with regulatory agencies, expert laboratories, first detectors, survey specialists, legal and health professionals, landscape managers, crop scouts, farmers and the lay public. This enables the practitioner and advanced student to understand and work within this network, critically important in a time when each submission takes on its own specific set of expectations and potential ramifications.

Insect diagnosticians must be knowledgeable on pests that affect human health, stored foods, agriculture, structures, as well as human comfort and the enjoyment of life. The identification and protection of the environment and the non-target animals (especially beneficial insects) in that environment is also considered a part of insect diagnostics. Additionally, Integrated Pest Management recommendations must include any of a variety of management tactics if they are to be effective and sustainable.

This greatly needed foundational information covers the current principles of applied insect diagnostics. It serves as a quick study for those who are called upon to provide diagnostics, as well as a helpful reference for those already in the trenches.

• Includes useful case studies to teach specific points in insect diagnostics
• Provides problem-solving guidance and recommendations for insect identification, threat potential, and management tactics, while accounting for the varying needs of the affected population or client
• Contains numerous color photos that enhance both applicability and visual appeal, together with accompanying write-ups of the common pests

Contemporary Problems in Plant Anatomy contains the proceedings of a plant anatomy symposium that took place at Duke University and The University of North Carolina at Chapel Hill in 1983. The symposium addressed challenges in four basic research areas in contemporary plant anatomy: leaf development, floral development, differentiation of cells and tissues, and systematic and ecological anatomy. The book highlights new techniques and approaches for dealing with problems in each of these areas.
Organized into 12 chapters, this volume begins with an overview of the stem-conducting tissues in monocotyledons; the development of vascular tissue patterns in the shoot apex of ferns; the role of subsidiary trace bundles in stem and leaf development of the dicotyledoneae; and the structure of phloem. It then discusses the cellular parameters of leaf morphogenesis in maize and tobacco; alternative modes of organogenesis in higher plants; morphological aspects of leaf development in ferns and angiosperms; the origin of symmetry in flowers; and intraspecific floral variation. The reader is also introduced to structural correlations among wood, leaves, and plant habit; relationships between structure and function in trees; and the development of inflorescence, androecium, and gynoecium with reference to palms.
This book is a valuable source of information for plant anatomists.