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Carbon (C), Nitrogen (N) and Phosphorus (P) are three of the most
important elements used to build living beings, and their uptake
from the environment is consequently essential for all organisms.
Photosynthesis is the process in which plants absorb atmospheric C
as they grow and convert it to biomass. However, plants acquire N
and P only when these are available in the soil solution, which
makes these elements the most limiting nutrients in plant growth
and productivity in most ecosystems. When plant residues and roots
decompose, the C, N and P they contain is transformed primarily
into soil organic matter (SOM) or C and N can release to the
atmosphere. Recent interest on the global C, N and P cycles has
focused attention on the different proportion of terrestrial C, N
and P stored in different ecosystem pools. Cuatro Cienegas
represents an exceptional place, since the plants are not the base
of the food web, they are the microbial community, that recycle the
elements essential for life. In this book we describe how this is
an analog of early Earth.
This unique volume describes advances in the field of
mechanochemistry, in particular the scaling up of mechanochemical
processes. Scalable techniques employed to carry out solvent-free
synthesis are evaluated. Comparability to continuous flow
chemistry, the current industrial benchmark for continuous
efficient chemical synthesis, is presented.The book concludes that
mechanochemical synthesis can be scaled up into a continuous,
sustainable process. It demonstrates that large-scale
mechanochemistry can meet industrial demands, especially in the
pharmaceutical industry. The case studies conducted on MOF
Technologies and Deasyl demonstrate how mechanochemistry is
employed on a pilot plant scale. Features Mechanochemistry is
rapidly developing as a multidisciplinary science on the borderline
between chemistry, materials science and environmental science This
unique text focuses on mechanochemistry with the ability to scale
up and illustrates how mechanochemical synthesis is no longer an
obstacle This timely book highlights recent advancements describing
what can be achieved in chemical synthesis Mechanochemistry enables
the synthesis of multiple polymorphic crystalline forms in the
production of drugs in the form of tablets or granules in capsules
Carbon (C), Nitrogen (N) and Phosphorus (P) are three of the most
important elements used to build living beings, and their uptake
from the environment is consequently essential for all organisms.
Photosynthesis is the process in which plants absorb atmospheric C
as they grow and convert it to biomass. However, plants acquire N
and P only when these are available in the soil solution, which
makes these elements the most limiting nutrients in plant growth
and productivity in most ecosystems. When plant residues and roots
decompose, the C, N and P they contain is transformed primarily
into soil organic matter (SOM) or C and N can release to the
atmosphere. Recent interest on the global C, N and P cycles has
focused attention on the different proportion of terrestrial C, N
and P stored in different ecosystem pools. Cuatro Cienegas
represents an exceptional place, since the plants are not the base
of the food web, they are the microbial community, that recycle the
elements essential for life. In this book we describe how this is
an analog of early Earth.
This book introduces selected contributions from the GEGAL (Spanish
acronym for Latin American Geoarchaeological Studies Group)
Workshop held at La Paloma Beach, Uruguay, with a focus on Coastal
Geoarchaeology, and an attendance of more than 50 researchers,
students and professionals from several Latin American countries.
The contributions were selected in order to encompass the vast
array of environmental, geomorphological and archaeological
contexts comprised in the geographical frame of Latin America.
Topics covered through the chapters include specific issues such as
human occupation and fluvial dynamic processes in mountain and
lowland environments, methodological developments in dating
methods, taphonomy and chemical proxies, as well as landscape
modification by anthropogenic disturbances. As the first
compilation of Coastal Geoarchaeology for Latin America, this book
is intended to become a useful tool for students, researchers and
professionals from related fields, as it comprises not only the
regional state of the art, but also new insights and developments
which can be potentially applied to other contexts world wide.
The English Speaker's Guide to Doctors & Hospitals in Mexico is
a comprehensive, up-to-date directory of English-speaking medical
practitioners, specialists and hospitals in Mexico and recommended
by trusted resources. The guide is organized by location and type
of practitioner or specialist, which makes it quick and easy to
find the medical care providers you need while living in or
visiting Mexico. The guide covers over 90 different locations
across Mexico, including all the major towns and cities, and many
of the secondary towns and small settlements near them. Where
English-speaking specialists are available, you will find listings
for dermatologists, endocrinologists, fertility specialists,
gastroenterologists, gynecologists, hematologists, internists,
neurologists, obstetricians, oncologists, orthopedists,
pathologists, pediatricians, plastic surgeons, psychiatrists,
psychologists, radiologists, surgeons, traumatologists, urologists,
etc. Written by award-winning science and medicine writer Monica
Rix Paxson, author of The English Speaker's Guide to Medical Care
in Mexico and researcher and author Luis Felipe Garcia Perez.
El presente estudio esta basado en un muestreo de caracter
transversal en escolares entre 2 y 11 anos de edad del municipio de
Donmatias (Antioquia), los cuales fueron evaluados
antropometricamente para determinar su estado nutricional;
adicionalmente se realizo un registro de la composicion de la dieta
en tres dias de la semana con el fin de establecer su patron
alimentario. Las variables antropometricas estudiadas fueron la
talla, el peso, y los pliegues cutaneos tricipital y subescapular.
Se estudio el crecimiento en distancia para el peso, la talla, el
indice de masa corporal y la sumatoria de ambos pliegues en funcion
del sexo y la edad, con el fin de conocer las variaciones a lo
largo del periodo de crecimiento y estudiar el dimorfismo sexual.
El patron alimentario se trabajo a partir del metodo de registro
diario de los alimentos que recibian los ninos en tres dias de la
semana discriminados cada uno en 6 momentos. La informacion
obtenida se desagrego por grupos de alimento y alimentos de cada
grupo, con lo cual se conocio la composicion de la dieta diaria de
cada individuo y la conformacion de un plato medio habitual."
La suma de estas paginas responde al interes de estudiar la
tradicion literaria de Popayan. No por tratarse de un conjunto
diverso, la seleccion de estudios, articulos y resenas, da cuenta
de un dialogo persistente con la poesia moderna de una region de
Colombia que se caracteriza por el culto al pasado y la
desestimacion casi obstinada del presente. De muchos modos nuestra
conversacion con la poesia de Popayan se ha prolongado durante al
menos una decada, en principio bajo la forma previa de una
conferencia, un articulo academico, un estudio introductorio o bien
la orientacion de un seminario tematico, todo ello dedicado a
pensar las obras de los autores aqui considerados, principalmente:
Guillermo Valencia (1873-1943), Rafael Maya (1897-1980), Alberto
Mosquera (1904-1967), Matilde Espinosa (1910-2008), Gloria Cepeda
(1928), Horacio Benavides (1949) y Fabio Holguin Marriaga (1961).
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