Firs and pines dominated the global picture of the raw materials for paper industry until the 1950s. At that time, the interest in introducing new species, mostly hardwoods, led the researchers intensify efforts to look for the fibrous characteristics and their combinations that could represent the relationship between fibres, pulp and paper.The pulp and paper industry has shown, mainly in the last two decades, a strong North-South displacement. This is to a large extent due to the favourable climate, which promote the development of the trees. Similarly, the paper fibres have gone from being almost exclusively softwoods from natural forests of the Northern-Hemisphere cold regions, such as spruce and fir, to fast growing species of short fibres, such as eucalyptus, and willow and poplar hybrids from plantations.These new species, that begin to dominate the paper panorama, not only differ from classic ones in fibre length, but they present particular characteristics, like large amounts of juvenile wood, different fibrillar angle and so on, because trees are used increasingly at younger age.This leads us to question whether the old paradigms concerning the relationships between fibres characteristics and pulp properties are still valid or should be reviewed and updated, in which case, the basic fibre parameters, their influence in pulping and refining, and their impact on paper quality should be redefined.To establish the state-of-the-art on the topic, this book analyses the publications of the last decade to verify the morphological characteristics of the fibres which are nowadays considered relevant. Relatively recent data were surveyed because of the continuous changes that occur in the species by genetic improvement.
This book looks at the functioning and symbolic meanings of the royal preserves, parks, and forests in a transitional period in Portuguese political regimes: at the end of the Ancien Regime and in the aftermath of the first liberal revolution in Portugal (1821), from 1777 to 1824.The aim is to understand how life developed in royal preserves before and after the Liberal Revolution in Portugal. The majority of academic work produced before 1998 focused on hunting and royal preserves in England, Spain or France. If the classic Whigs and Hunters, by E. P. Thompson, proclaimed the prerogatives of aristocracy for the British aristocratic mastering of property rights, status and ethos, other contributions of the preserves regime, in the mastering of social order and in the attempt to balance or master powers, can be added, for other regions in Europe. In this case, the focus is on Portugal.
This is an interdisciplinary examination of depictions of girlhoods through a comparative study of foundational fairy tales revised and reimagined in popular narrative, film, and television adaptations. The success of franchises such as The Hunger Games, Twilight and Divergence have re-presented the young heroine as an empowered female, and often a warrior hero in her own right. Through a selection of popular culture touchstones this empowerment is questioned as a manipulation of feminist ideals of equality and a continuation of the traditional vision of female awakening centering on issues of personal choice, agency, physical violence, purity, and beauty. By investigating re-occurring storytelling frameworks and archetypes, Untaming Girlhoods examines different portrayals of girlhoods in the 20th- and 21st-century Anglo-American cultural imaginary that configure modern girlhoods, beyond the fairy-tale princess or the damsel in distress, into refigurations that venture away from the well-trodden path for a new breakaway path to authentic selfhood. This will be a useful and enlightening text for students and researchers in Girlhood Studies, Gender Studies, Film Studies, Popular Culture and Media Studies.
Between the Atlantic and the Mediterranean brings together a set of case studies on living organisms' adaptation to the evolution of the climate and adjustments to extreme weather conditions. Aiming to go beyond concerns about recent and forthcoming climate change, which have dominated research in environmental studies this book adopts a long-term perspective on adaptations and adjustments to nature. Although an important group of papers deal with the Portuguese territory and the Iberian Peninsula, in which a complex mosaic of Atlantic and Mediterranean climates helped to shape landscapes and history, the book has a broader geographical scope from England to Italy. Contributions look at the distribution and numbers of animal species and, material, social, cultural and religious responses to weather in the short term and to climate in the long term. The common ground is the reaction of living organisms to "natural hazards". In the long term, these are cyclical, and nowadays predictable.
In the royal and princely courts of Europe, artworks made of multicolored semiprecious stones were passionately coveted objects. Known as pietre dure, or hardstones, this type of artistic expression includes?paintings in stone,? which were composed of intricately cut separate pieces that were made into magnificent tabetops, cabinets, and wall decorations. Other works included vessels and ornaments carved with virtuosic skill from a single piece of rare and brilliant lapis lazuli, chalcedony, jasper, or similarly prized substance; exquisite objects such as boxes, clocks, and jewelry; and portraits of nobles sculpted in variously colored stones. Derived from ancient Roman decorative stonework, the art of pietre dure was developed in Renaissance Florence, where the manufacture of such objects was enthusiastically sponsored by Medici princes. Ideally suited for ostentatious display, the works sent an unmistakable message of wealth and political might that was understood in centers of power everywhere. From Italy the medium spread across Europeto Prague, Madrid, Naples, Paris, and later Saint Petersburg. Precious and fragile, pietre dure objects are rarely brought together in large numbers. This richly illustrated catalogue contains more than 150 masterworks from across Europe, dating from five centuries, including almost every artistic use of semiprecious stone during this time as well as some of the finest examples of the medium. Eight essays by European and American experts discuss the individualized development of pietre dure in every European region, the latest developments in scholarship, the interrelationships between art and dynastic politics and between cultures, and a variety of techniques used to produce these luxurious masterworks."--Metropolitan Museum of Art website.
In the sixteenth century medicinal plants, which until then had been the monopoly of apothecaries, became a major topic of investigation in the medical faculties of Italian universities, where they were observed, transplanted, and grown by learned physicians both in the wild and in the newly founded botanical gardens. Tuscany was one of the main European centres in this new field of inquiry, thanks largely to the Medici Grand Dukes, who patronised and sustained research and teaching, whilst also taking a significant personal interest in plants and medicine. This is the first major reconstruction of this new world of plants in sixteenth-century Tuscany. Focusing primarily on the medical use of plants, this book also shows how plants, while maintaining their importance in therapy, began to be considered and studied for themselves, and how this new understanding prepared the groundwork for the science of botany. More broadly this study explores how the New World's flora impacted on existing botanical knowledge and how this led to the first attempts at taxonomy.
Why—contrary to much expert and popular opinion—more education may not be the answer to skyrocketing inequality. For generations, Americans have looked to education as the solution to economic disadvantage. Yet, although more people are earning degrees, the gap between rich and poor is widening. Cristina Groeger delves into the history of this seeming contradiction, explaining how education came to be seen as a panacea even as it paved the way for deepening inequality. The Education Trap returns to the first decades of the twentieth century, when Americans were grappling with the unprecedented inequities of the Gilded Age. Groeger’s test case is the city of Boston, which spent heavily on public schools. She examines how workplaces came to depend on an army of white-collar staff, largely women and second-generation immigrants, trained in secondary schools. But Groeger finds that the shift to more educated labor had negative consequences—both intended and unintended—for many workers. Employers supported training in schools in order to undermine the influence of craft unions, and so shift workplace power toward management. And advanced educational credentials became a means of controlling access to high-paying professional and business jobs, concentrating power and wealth. Formal education thus became a central force in maintaining inequality. The idea that more education should be the primary means of reducing inequality may be appealing to politicians and voters, but Groeger warns that it may be a dangerous policy trap. If we want a more equitable society, we should not just prescribe more time in the classroom, but fight for justice in the workplace.
The purchase of this ebook edition does not entitle you to receive access to the Connected eBook with Study Center on CasebookConnect. You will need to purchase a new print book to get access to the full experience, including: lifetime access to the online ebook with highlight, annotation, and search capabilities; practice questions from your favorite study aids; an outline tool and other helpful resources. This hugely successful materials-and-problems book is acclaimed for its textual clarity, evenhanded perspective, and contemporary, up-to-date character. Easily distinguished from other property casebooks for its plain-language descriptions of legal doctrine; explanations of the social ramifications of our system of property law; emphasis on statutory and regulatory interpretation; comprehensive treatment of public accommodations and fair housing law, tribal property issues, and property in human bodies; and use of the problem method to teach legal reasoning and lawyering skills. Streamlined for more accessible teaching, the Eighth Edition has been thoroughly updated to reflect significant changes in the law of property, including in responses to the Covid-19 pandemic, in intellectual property, housing discrimination, regulatory takings, and more. Key Features: Updated to reflect significant changes in the law of property to help professors keep current and be aware of emerging disputes Streamlined to assist in making teaching from the casebook more accessible, without sacrificing coverage and depth New materials and problems have been added in an array of areas, including: The importance of race and slavery in shaping property law and distribution The impact of the Covid-19 pandemic on several core areas of property law Growing questions about the balance between public accommodations and religious liberty, including Masterpiece Cakeshop, Inc. v. Colorado Civil Rights Commission, 138 S. Ct. 1719 (2018) and its aftermath Emerging caselaw on the rights of people experiencing homelessness; Shifts in property rights emerging from marriage and non-marital intimate relationships; New materials on the law and practice of trusts and the impact of reproductive technologies Recent developments in tribal sovereignty disputes, including McGirt v. Oklahoma, 140 S. Ct. 2452 (2020) Developments in intellectual property, including in copyright and fair use Shifts in fair housing law, including developments involving landlord responsibility for tenant-to-tenant discriminatory harassment Recent Supreme Court developments in the realm of regulatory takings, including Murr v. Wisconsin, 137 S.Ct. 1933 (2017), Knick v. Township of Scott, 139 S. Ct. 2162 (2019); and Cedar Point Nursery v. Hassid (to be decided by the end of this Term) Professors and students will benefit from: Clear, concise, accessible coverage of core property doctrines, through caselaw, statutes, and regulatory materials Fully updated engagement with contemporary controversies in our system of property; and Excellent opportunities for problem- and exercise-based learning in every section
Postmodern Fairy Tales seeks to understand the fairy tale not as children's literature but within the broader context of folklore and literary studies. It focuses on the narrative strategies through which women are portrayed in four classic stories: "Snow White," "Little Red Riding Hood," "Beauty and the Beast," and "Bluebeard." Bacchilega traces the oral sources of each tale, offers a provocative interpretation of contemporary versions by Angela Carter, Robert Coover, Donald Barthelme, Margaret Atwood, and Tanith Lee, and explores the ways in which the tales are transformed in film, television, and musicals.
Nondestructive Biomarkers in Vertebrates presents an innovative approach for hazard assessment in vertebrates based on nondestructive rather than destructive methods. The book reviews the state of the art and defines the development and validation procedure of this new strategy. Biological materials, such as blood samples, epithelial tissue, eggs, feathers, and feces that can be obtained without stress or damage to the animal are suggested. Certain traditional studies (blood esterases, blood chemistry, mixed function oxidases, porphyrins, DNA damage, and cytological changes) can be performed on these specimens, along with new tests requiring only very small samples. This approach is developed to benefit protected, threatened species whose existence cannot be further jeopardized by the use of destructive methods. This volume will be particularly useful to ecotoxicologists, wildlife protection personnel, environmental consultants, and conservationist organizations.
This book offers the state of the art on the progress and accomplishments of 25 years of research at the Associate Laboratory LSRE-LCM - Laboratory of Separation and Reaction Engineering - Laboratory of Catalysis and Materials on lignin conversion to value-added products and their downstream separation. The first valorisation pathway presented for lignin is its partial depolymerisation by oxidation for the production of low molecular weight phenolic compounds, such as vanillin and syringaldehyde, and the second one is the lignin application as macromonomer for polyurethane synthesis. In this book, the authors present the integration of these two valorisation pathways as an exclusive vision of LSRE-LCM resulting from hands-on experience on reaction and separation processes: the integrated process for lignin valorisation. In this perspective, the lignin is oxidized to simultaneously produce syringaldehyde and vanillin, and the obtained by-products to produce a polyol for lignin-based polyurethanes, completing the lignin value chain. On the perspective of pulp mill-related biorefineries, a valorisation route for eucalyptus bark is also presented, focusing on LSRE-LCM experience on extraction and separation of bioactive polyphenols, giving some insights about further integration of extracted bark on biorefining operations.
Architects Philip Johnson, Marcel Breuer, Landis Gores, Eliot Noyes, Edward Durell Stone, and others created an extraordinary collection of modern houses in New Canaan, Connecticut, in the 1940s and 1950s. The bucolic New England town—a suburb of Manhattan—became the site of fervent experimentation by some of the leading lights of the movement in the United States, the architects known as the Harvard Five, whose modern aesthetic could be traced to the Bauhaus school of design. There they promoted their core principles: simplicity, openness, and sensitivity to site and nature, and built glass, wood, steel, and fieldstone houses that established architectural modernism as the ideal of domesticity in the twentieth century. Architects Jeffrey Matz and Cristina A. Ross, photographer Michael Biondo, and graphic designer Lorenzo Ottaviani present this vanishing generation of iconic American houses as more than an issue of restoration or preservation, but as an evolving legacy that adapts to contemporary life. Selecting a representative group of sixteen houses covering the period between the 1950s and 1978, they portray each one in great detail, with floor plans, timelines, and both archival and luminous new photography—from the clean, minimalist look of the initial construction, to subsequent additions by some of the most significant architects of our time including Toshiko Mori, Roger Ferris, and Joeb Moore. Voices of the architects and builders, original owners and current occupants combine to describe how the houses are enjoyed and lived in today, and how the modernist residence is more than just a philosophy of design and construction, but also a philosophy of living.
Unbecoming Female Monsters: Witches, Vampires, and Virgins is a multi-cultural and interdisciplinary work that traces the construct of female monsters as an embodiment of socio-cultural fears of female sexuality and reproductive powers. This book examines the female sexual maturation cycle and the various archetypes of female monsters associated with each stage of sexual development as seen in literature, art, film, television, and popular culture. Recommended for scholars of Latin American studies, literature, cultural studies, women and gender studies, popular culture, and film studies.
In this book, Dante, Seamus Heaney and Derek Walcott engage in an eloquent and meaningful conversation. Dante's capacity for being faithful to the collective historical experience and true to the recognitions of the emerging self, the permanent immediacy of his poetry, the healthy state of his language, which is so close to the object that the two are identified, and his adamant refusal to get lost in the wide and open sea of abstraction - all these are shown to have affected, and to continue to affect, Heaney's and Walcott's work. The Flight of the Vernacular, however, is not only a record of what Dante means to the two contemporary poets but also a cogent study of Heaney's and Walcott's attitude towards language and of their views on the function of poetry in our time. Heaney's programmatic endeavour to be "adept at dialect" and Walcott's idiosyncratic redefinition of the vernacular in poetry as tone rather than as dialect - apart from having Dantean overtones - are presented as being associated with the belief that poetry is a social reality and that language is a living alphabet bound to the "opened ground" of the world.
The Infinite Cord is a bilingual inspirational memoir about the simple life of a Brazilian family in a coffee farm. The stories were stitched to celebrate the 80th birthday of a matriarch. The memories include happiness, humor, suffering, resilience, and other moments of being human. The narratives may help you to look inside and change your life perception. Family and friends make us who we are; the infinite cord connects past, present, and future. Let ́s dive in this authentic readings sewed by hand. Sobre o Livro O Cordão Infinito é um livro de memórias inspirador bilíngue que descreve a vida simples de uma família brasileira em uma fazenda de café. As histórias foram alinhavadas para comemorar os 80 anos de uma matriarca. As memórias incluem a felicidade, o humor, o sofrimento, a resiliência e outros momentos que relacionam-se ao ser humano. As narrativas podem te ajudar a refletir e mudar a sua percepção de vida. Família e amigos fazem de nós o que somos; o cordão infinito conecta passado, presente e futuro. Mergulhemos nestas autênticas leituras costuradas à mão.
LORE of the GHOST SHIP by Cristina Montalva set on the Chilean Archipelago of Chiloe draws on local folk-lore and tradition to create a magical realistic fable with color, action and human depth. The story follows Pancho, a teenage boy, as he tries to come to terms with and understand his mother`s sudden disappearance. One of the ways he does this is to ask his uncle, Mateo, who is well versed in the mythology of the island, about the Ghost Ship, a legendary vessel which haunts the waters around the Archipelago. Mateo narration of the tale is central to the plot, and it is on the basis of this story-telling that Pancho`s final resolution occurs.
In this interactive chapter book, YOU are a reporter for a high-profile magazine, and you're about to discover the greatest scoop yet: Do aliens exist? To find out, you'll need to investigate some of history's most infamous alien encounters, from Area 51 in Nevada to Fairbanks, Alaska. Will you discover a real-life alien being, or will your investigative probe be nothing more than a close encounter? It's up to YOU! With dozens of choices, you can follow the clues to the end. Which path will YOU CHOOSE to discover the truth?"--Amazon.
Fin and Betty's close friendship survived Fin's ninth-grade move from their coastal Maine town to Manhattan. Calls, letters, and summer visits continued to bind them together, and in the fall of their senior year, they both applied to NYU, planning to reunite for good as roommates. Then Betty disappears. Her ex-boyfriend Calder admits to drowning her, but his confession is thrown out, and soon the entire town believes he was coerced and Betty has simply run away. Fin knows the truth, and she returns to Williston for one final summer, determined to get justice for her friend, even if it means putting her loved ones and herself at risk.
Principles of International Finance and Open Economy Macroeconomics: Theories, Applications, and Policies presents a macroeconomic framework for understanding and analyzing the global economy from the perspectives of emerging economies and developing countries. Unlike most macroeconomic textbooks, which typically emphasize issues about developed countries while downplaying issues related to developing countries, this book emphasizes problems in emerging economies, including those in Latin American countries. It also explains recent developments in international finance that are essential to a thorough understanding of the effects and implications of the recent financial crisis. - Concentrates on developing country perspectives on International Finance and the Economy, including those in Latin American countries - Provides case studies and publicly available data allowing readers to explore theories and their applications - Explains recent developments in international finance that are essential to a thorough understanding of the effects and implications of the recent financial crisis - Proposes a unified mathematical model accessible to those with basic mathematical skills
In Águila: The Vision, Life, Death, and Rebirth of a Two-Spirit Shaman in the Ozark Mountains, María Cristina Moroles traces the path of her extraordinary life from the streets of Dallas to the wilderness of the Arkansas Ozarks, where she has resided for fifty years. Hailing from a large Indigenous and Mexican American family in Texas, Moroles apprentices herself to healers and shamans across the Americas as she follows the spiritual vision that leads her to establish a mountaintop sanctuary for women and children of color in a notoriously insular location in the Ozark Mountains. This is a survivor’s tale, and a back-to-the-lander’s tale, unlike any other. From early traumas to countercultural rebellion and profound spiritual awakening, Moroles recounts milestones that earn her the ceremonial names SunHawk and Águila, as she builds a sustainable community off the grid, atop a mountain otherwise uninhabited by human life. Águila tells the truth of one woman’s search for freedom and all women’s quest for dignity as it celebrates the healing powers of nature.
When in 1895 twenty-one-year-old Guglielmo Marconi made his first wireless transmission over land, he became the boy wonder of the world. When subsequently, he made similar transmissions across the Atlantic Ocean, thus proving to the world that his radio-related inventions had immediate and wide-spread applications for all of humanity, young Marconi ushered in the Age of Communication. The life, the works, the character of one of the greatest scientists of this Century, Guglielmo Marconi, the inventor of the Radio, are described in this carefully documented, impassioned and deeply involved book by an exceptional witness: his wife Maria Cristina. He was called 'The genius who gave a voice to silence'. Acclaimed by the whole world, the recipient of the most prestigious honours and decorations, he never lost his innate modesty and discretion even at the height of his success.
Peer-to-peer (P2P) networks – decentralized group structures allowing anyone to easily download and share resources online – already play a critical role in the distribution of digital content. Most of the debate on P2P heretofore has focused on copyright issues. However, as the basis for legitimate business models a number of companies have already quietly embraced, P2P has a largely unknown and underestimated impact on taxation, with vast repercussions on the development of mature, profitable markets. This book analyses the current framing for digital and media supplies provided via P2P technologies through the lens of an interdisciplinary approach drawing on tax law, computer science, economics, copyright law, and business studies. VAT concepts such as those of economic activity and taxable person, taxable transactions, consideration, barter and taxable amount, and territoriality rules are discussed in connection with P2P, as is the evaluation of VAT liability for P2P operations in the presence of copyright infringement. Topics and issues considered include: - centralized and decentralized P2P networks; - free-riding problems; - identifying actors in P2P networks for VAT purposes; - P2P and place of supply; and - pros and cons of integrating P2P with taxation regimes and especially VAT systems. The analysis draws on a vast range of sources, including EU legislation and case law, tax law literature and doctrine, international conventions and treaties, Council of Europe and OECD documents, ECHR case law, and official documents and cases from key jurisdictions worldwide, offering the first thoroughly grounded approach to overcoming the lack of understanding and awareness of ongoing changes currently separating the digital economy and traditional taxation systems, and a solid platform for discussion to the diverse communities of researchers and professionals interested in P2P.
This unique volume illustrates and discusses in detail more than 160 extraordinary fine and decorative art works of the colonial Andes, including examples of the intricate Inca weavings and metalwork that preceded the colonial era as well as a few of the remarkably inventive forms this art took after independence from Spain. An international array of scholars and experts examines the cultural context, aesthetic preoccupations, and diverse themes of art from the viceregal period, particularly the florid patternings and the fanciful beasts and hybrid creatures that have come to characterize colonial Andean art."--Jacket.
In Europe a number of production and communication strategies have long tried to establish local products as resources for local development. At the foot of the Alps, this scenario appears in all its contradictions, especially in relation to cheese production. The Heritage Arena focuses on the saga of Strachitunt, a cheese that has been designated an EU Protected Designation of Origin after years of negotiation and competition involving cheese-makers, merchants, and Slow Food activists. The book explores how the reinvention of cheese as a form of heritage is an ongoing and dynamic process rife with conflict and drama.
This book focuses on Luis Frois, a 16th-century Portuguese Jesuit and chronicler, who recorded his impressions of Japanese gardens, cities and building practices, tea-drinking rituals, Japan’s unification efforts, cultural traditions, and the many differences between Europe and Japan in remarkable manuscripts almost lost to time. This research also draws on other Portuguese descriptions from contemporary sources spanning the years 1543 – 1597, later validated by Japanese history and iconography. Importantly, explorer Jorge Alvares recorded his experiences of discovery, prompting St. Francis Xavier to visit Japan in 1549, thus ushering in the “Christian Century” in Japan. During this long period of accord and reciprocal curiosity, the Portuguese wrote in excess of 1500 pages of letters to European Jesuits that detail their impressions of the island nation—not to mention their observations of powerful public figures such as Oda Nobunaga, Toyotomi Hideyoshi, and Sen no Rikyu. In addition to examining these letters, the authors translated and researched early descriptions of 23 gardens in Kyoto and Nara and 9 important cities—later visited by the authors, sketched, photographed and compared with the imagery painted on 16th-century Japanese screens. However, the data gathered for this project was found mainly within five large volumes of Frois’ História do Japão (2500 pages) and his Treaty on Contradictions—two incomparable anthropological works that were unpublished until the mid-20th century for reasons detailed herein. His volumes continue to be explored for their insightful observations of places, cultural practices, and the formidable historical figures with whom he interacted. Thus, this book examines the world’s first globalization efforts that resulted in profitable commerce, the introduction of Portuguese firearms that changed Japan’s history, scientific advances, religious expansion, and many artistic exchanges that have endured the centuries.
A native of Italy and a splendid cook herself, Mazzoni savors the food writings and images of a broad spectrum of Catholic saints and holy women, including Catherine of Genoa, Angela of Foligno, Gemma Galgani, and the first person in the United States to be canonized, Elisabeth Ann Seton. Continuum Books
This book presents results of an archaeological research project focused on a specific monumental area, the citadel, in the city of Urfa (Turkey), known in ancient times as Edessa. Three seasons of fieldwork were carried out (2014-2016) in order to identify the building sequence of the citadel and establish an absolute chronology of events.
Filled cover to cover with beautiful color photographs, Storage: Good Ideas provides numerous stylist and effective options for every room in your home. This idea book not only showcases innovative storage solutions, but also includes a resource section with information about featured products and manufacturers. With chapters on Living Rooms, Kitchens, Bathrooms, Studies, Stairs and Hallways, and Accessories, this book is a must-have for design professionals and anyone looking to organize and maximize space.
Doctoral Thesis / Dissertation from the year 2015 in the subject Energy Sciences, grade: 1, Technical University of Darmstadt, course: Materialwissenschaften, language: English, abstract: Our society depends overwhelmingly on carbon based resources (coal, natural gas and oil). The use of carbon based resources to meet the current energy needs of our society is associated with two critical drawbacks, that are: i) carbon based resources are not renewable and ii) burning hydrocarbons and venting the waste gases into atmosphere, e.g., carbon dioxide (CO2), leads to worsening of the greenhouse effect. As a response to these issues, the strategy of so-called “green carbon” has been proposed. This strategy consist of obtaining energies that foresees a gradual transition from carbon based resources to hydrogen based fuel, i.e., “hydrogen economy”, while simultaneously increasing the role of renewable energies. Carbon based resources would ultimately be used for synthesis of high-value chemicals and hydrogen (H2) generation. This strategy is possible to become a reality only if innovations in materials, chemistry, catalysis, and other engineering related fields are to occur. From a materials science perspective, extensive research is currently underway to develop materials able to store H2, to capture CO2, or to separate H2 from byproducts such as CO2, CO, or N2. This work aims to explore the opportunities, as well as the associated limitations of the use of silicon oxycarbonitride ceramics derived from preceramic polymers by NH3-assisted route for the above-mentioned applications, such as H2 gas separation membranes, and H2 or CO2 capture or storage materials in form of powders. A simple and general synthesis method to tune the chemical composition and pore size, as well as the surface area of oxycarbonitride ceramics has been developed. This method is based on modifying the structure of preceramic polymers through chemical reactions with NH3 at 300 – 800 oC, followed by a thermolysis under an Ar atmosphere at 750 oC. Under these synthesis conditions a polysiloxane and a polysilazane transform to microporous ceramics, while materials derived from a polycarbosilane remain nonporous, as revealed by N2 and CO2 adsorption isotherms. Small angle X-ray scattering (SAXS) characterization indicates that samples prepared from the polycarbosilane possess latent pores (pore size
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