Herança e relações genéticas entre densidade da semente, teores de proteína e óleo e produtividade em soja

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ISBN 13 :
Total Pages : 340 pages
Book Rating : 4.:/5 (79 download)

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Book Synopsis Herança e relações genéticas entre densidade da semente, teores de proteína e óleo e produtividade em soja by : L. A. S. Silva

Download or read book Herança e relações genéticas entre densidade da semente, teores de proteína e óleo e produtividade em soja written by L. A. S. Silva and published by . This book was released on 2008 with total page 340 pages. Available in PDF, EPUB and Kindle. Book excerpt: O elevado valor sócioeconômico da soja é atribuído, em grande parte, à combinação muito favorável de altos teores de proteína e óleo, juntamente com níveis adequados de produtividade de grãos. Porém, existe uma alta correlação negativa entre os teores de proteína e óleo, fato que dificulta o melhoramento simultâneo destes caracteres. Além disso, também existe tendência de correlação negativa e moderada entre o teor de proteína e a produtividade de grãos. Existem evidências de que a seleção para a densidade da semente pode promover ganhos indiretos simultâneos no teor de proteína e na produtividade de grãos. Assim, os principais objetivos deste trabalho foram: a) estimar parâmetros genéticos relacionados com a herança da densidade da semente; b) avaliar a eficiência da seleção para densidade da semente no melhoramento do teor de proteína e da produtividade de grãos. Para o estudo de herança foram utilizados quatro cruzamentos diferentes: USP98-06.011. x Abura, M-SOY 8001 x Abura, USP98-06.027.03 x Biloxi e USP98-06.009.01 x PI 239.235, sendo que os parentais e as plantas F 2 foram avaliados durante a safra 2006/07. Já para avaliar as respostas correlacionadas à seleção para densidade da semente foram delineados três experimentos distintos: Experimento Inicial, no qual foram avaliadas 520 progênies F 7:6, durante a safra 2005/06; Experimento Densidade, em que foram avaliadas 100 progênies F8:6 selecionadas para densidade da semente; Experimento Alimentos, em que foram avaliadas 100 progênies F8:6 selecionadas para soja tipo alimento. Os dois últimos experimentos foram realizados durante a safra 2006/07, e as progênies avaliadas neles foram selecionadas dentre as 520 progênies F7:6 do Experimento Inicial. Os resultados permitiram chegar as seguintes conclusões: a) existe ampla variabilidade genética para densidade da semente; b) a herdabilidade no sentido amplo para este caráter é baixa quando estimada na geração F2, mas em geração avançada de endogamia atinge valor alto; c) a herança genética é aditiva e, assim, o caráter não manifesta hereose; d) existe correlação moderada e positiva da densidade da semente com a produtividade de grãos e o teor de proteína e, por outro lado, a correlação entre a densidade da semente e o teor de óleo é negativa; e) é possível identificar genótipos tipo alimento com médias altas de produtividade de grãos e teor de proteína; f) a seleção para aumentar a densidade da semente é eficiente no melhoramento simultâneo do teor de proteína e da produtividade de grãos, permitindo a obtenção de genótipos com alta produtividade de proteína; g) a seleção para reduzir a densidade da semente não promove aumentos significativos do teor de óleo.

Herança e relações genéticas entre densidade da semente, teores de proteína e óleo e produtividade em soja

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ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (691 download)

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Book Synopsis Herança e relações genéticas entre densidade da semente, teores de proteína e óleo e produtividade em soja by :

Download or read book Herança e relações genéticas entre densidade da semente, teores de proteína e óleo e produtividade em soja written by and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: O elevado valor sócioeconômico da soja é atribuído, em grande parte, à combinação muito favorável de altos teores de proteína e óleo, juntamente com níveis adequados de produtividade de grãos. Porém, existe uma alta correlação negativa entre os teores de proteína e óleo, fato que dificulta o melhoramento simultâneo destes caracteres. Além disso, também existe tendência de correlação negativa e moderada entre o teor de proteína e a produtividade de grãos. Existem evidências de que a seleção para densidade da semente pode promover ganhos indiretos simultâneos no teor de proteína e na produtividade de grãos. Assim, os principais objetivos deste trabalho foram: a) estimar parâmetros genéticos relacionados com a herança da densidade da semente; b) avaliar a eficiência da seleção para densidade da semente no melhoramento do teor de proteína e da produtividade de grãos. Para o estudo de herança foram utilizados quatro cruzamentos diferentes: USP98-06.011.10 x Abura, MSOY 8001 x Abura, USP98-06.027.03 x Biloxi e USP98-06.009.01 x PI 239.235, sendo que os parentais e as plantas F2 foram avaliados durante a safra 2006/07. Já para avaliar as respostas correlacionadas à seleção para densidade da semente foram delineados três experimentos distintos: Experimento Inicial, no qual foram avaliadas 520 progênies F7:6, durante a safra 2005/06; Experimento Densidade, em que foram avaliadas 100 progênies F8:6 selecionadas para densidade da semente; Experimento Alimentos, em que foram avaliadas 100 progênies F8:6 selecionadas para soja tipo alimento. Os dois últimos experimentos foram realizados durante a safra 2006/07, e as progênies avaliadas neles foram selecionadas dentre as 520 progênies F7:6 do Experimento Inicial. Os resultados permitiram chegar as seguintes conclusões: a) existe ampla variabilidade genética para densidade da semente; b) a herdabilidade no sentido amplo para este caráter é baixa quando estimada na geração F2, mas em geração avançada de endogamia atinge valor alto.

Relacoes entre os teores de oleo, proteina e tamanho das sementes de soja

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ISBN 13 :
Total Pages : 82 pages
Book Rating : 4.:/5 (79 download)

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Book Synopsis Relacoes entre os teores de oleo, proteina e tamanho das sementes de soja by : M. Marega Filho

Download or read book Relacoes entre os teores de oleo, proteina e tamanho das sementes de soja written by M. Marega Filho and published by . This book was released on 1999 with total page 82 pages. Available in PDF, EPUB and Kindle. Book excerpt: A soja e uma leguminosa de grande importancia em virtude, principalmente, de seu elevado conteudo de oleo e proteina de grao. Nos anos agricolas 1995/96 e 1996/97, foram conduzidos dois experimentos - um a campo e outro em casa de vegetacao, na Universidade Estadual de Londrina, visando: (1) quantificar os teores de oleo e proteina em dois grupos de genotipos de soja, sendo que um grupo conduzido a campo foi constituido por 25 linhagens (geracoes F9 e F10), oriundas de topocruzamentos entre soja tipo alimento com dois testadores tipo grao: Doko e FT-2, alem das cultivares FT_Monsanto, Doko e FT-2, totalizando por 39 genotipos, entre cultivares e linhagens de soja tipo alimento; (2) estimar as correlacoes fenotipicas, genotipicas e de ambiente existentes entre os teores de oleo, proteina e tamanho das sementes, nesses genotipos; e, (3) identificar genotipos para consumo humano de forma direta, com elevado teor de proteina. O delineamento estatistico utilizado foi o de blocos casualizados com tres repeticoes, sendo que no experimento a campo cada repeticao foi constituida de uma linha de semeadura de 5m de comprimento e no experimento em casa de vegetacao constitui-se de um vaso com tres plantas. Foram avaliados os caracteres peso de Cem Sementes (PCS, expresso em gramas / 100 sementes), teor de oleo (TO), e teor de proteina (TP), expresso em %. Com base nas medias das parcelas (repeticoes), realizaram-se analises individuais de variancia para cada um dos dois anos avaliados e, tambem analises conjuntas. Visando verificar a existencia de diferencas significativas entre as medias dos tramentos, aplicou-se o teste de Duncan. Alem disso, estimaram-se as correlacoes existentes entre os tres caracteres e realizou-se o desdobramento da interacao entre tratamentos e anos. De um modo geral, os tratamentos apresentaram um baixa variabilidade para o caracteres TO e TP, e essa baixa variabilidade foi mais pronunciada para o carater TP entre os genotipos conduzidos a campo. A populacao conduzida a campo apresentou um teor de oleo de 16,62%, variando de 12 (GA22) a 20,37% (GA14), e um teor medio de proteina de 38,64%, variando de 35,66 (FT-2) a 41,75% (GA17). Ja a populacao conduzida em casa de vegetacao apresento um teor medio de proteina de 36,75% variando de 32,95 (Paranagoiana) a 41,56% (PI408251). Em casa de vegetacao, as correlacoes entre os teores de oleo e proteina foram negativas e significativas (r= -0,45**, rg= 0,65, para analise conjunta). Na analise conjunta, o tamanho das sementes apresentou correlacoes significativas e positivas com teor de oleo (Rf=0,20,rg=0,24), bem como, tambem, com o teor de proteina (rf=9,0,02, rg=0,04). Na condicao de casa de vegetacao, as analises individuais mostram que a relacao do peso de cem sementes com os teores de oleo e proteina foram baixas e muito afetadas pelos efeitos dos anos. Destacaram-se, dentre os tratamentos conduzidos a campo, GA23 E GA20; e, dentre os tratamentos conduzidos em casa de vegetacao, PI408251, Waseda, B6F4 (L-3 less), PI423909 e Tambagura, pelo elevado teor de proteina e pela estabilidade obtidas, principalmente em relacao aos teores de oelo e proteina.

A Frequency Dictionary of Portuguese

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Publisher : Routledge
ISBN 13 : 113411091X
Total Pages : 950 pages
Book Rating : 4.1/5 (341 download)

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Book Synopsis A Frequency Dictionary of Portuguese by : Mark Davies

Download or read book A Frequency Dictionary of Portuguese written by Mark Davies and published by Routledge. This book was released on 2007-11-29 with total page 950 pages. Available in PDF, EPUB and Kindle. Book excerpt: An invaluable tool for learners of Portuguese, this Frequency Dictionary provides a list of the 5000 most commonly used words in the language. Based on a twenty-million-word collection of Portuguese (taken from both Portuguese and Brazilian sources), which includes both written and spoken material, this dictionary provides detailed information for each of the 5000 entries, including the English equivalent, a sample sentence, and an indication of register and dialect variation. Users can access the top 5000 words either through the main frequency listing or through an alphabetical index. Throughout the frequency listing there are also thrity thematically-organized ‘boxed’ lists of the top words from a variety of key topics such as sports, weather, clothing and relations. An engaging and highly useful resource, A Frequency Dictionary of Portuguese will enable students of all levels to get the most out of their study of Portuguese vocabulary. Former CD content is now available to access at www.routledge.com/9780415419970 as support material. Designed for use by corpus and computational linguists it provides the full text in a format that researchers can process and turn into suitable lists for their own research work.

A Frequency Dictionary of Spanish

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Publisher : Routledge
ISBN 13 : 1134874537
Total Pages : 1457 pages
Book Rating : 4.1/5 (348 download)

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Book Synopsis A Frequency Dictionary of Spanish by : Mark Davies

Download or read book A Frequency Dictionary of Spanish written by Mark Davies and published by Routledge. This book was released on 2017-12-12 with total page 1457 pages. Available in PDF, EPUB and Kindle. Book excerpt: A Frequency Dictionary of Spanish has been fully revised and updated, including over 500 new entries, making it an invaluable resource for students of Spanish. Based on a new web-based corpus containing more than 2 billion words collected from 21 Spanish-speaking countries, the second edition of A Frequency Dictionary of Spanish provides the most expansive and up-to-date guidelines on Spanish vocabulary. Each entry is accompanied with an illustrative example and full English translation. The Dictionary provides a rich resource for language teaching and curriculum design, while a separate CD version provides the full text in a tab-delimited format ideally suited for use by corpus and computational linguistics. With entries arranged both by frequency and alphabetically, A Frequency Dictionary of Spanish enables students of all levels to get the most out of their study of vocabulary in an engaging and efficient way.

Teaching as a Subversive Activity

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Publisher : Laurel
ISBN 13 :
Total Pages : 228 pages
Book Rating : 4.3/5 (97 download)

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Book Synopsis Teaching as a Subversive Activity by : Neil Postman

Download or read book Teaching as a Subversive Activity written by Neil Postman and published by Laurel. This book was released on 1987 with total page 228 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Vegetation of the Earth and Ecological Systems of the Geo-biosphere

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Publisher : Springer Science & Business Media
ISBN 13 : 1468404687
Total Pages : 295 pages
Book Rating : 4.4/5 (684 download)

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Book Synopsis Vegetation of the Earth and Ecological Systems of the Geo-biosphere by : Heinrich Walter

Download or read book Vegetation of the Earth and Ecological Systems of the Geo-biosphere written by Heinrich Walter and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 295 pages. Available in PDF, EPUB and Kindle. Book excerpt: Phytomass and Primary Production of the Various Vegetational Zones and of the Entire Biosphere The biosphere is that thin layer at the earth's surface in which living organisms exist and biological cycling takes place. It includes the upper horizons of the soil in which plants root, the atmosphere near the ground, (insofar as organisms penetrate this space), and all the surface waters. More than 99% of the earth's biomass is phytomass, to which we shall limit our discussion. Amounts of phytomass are distinctly related to vegeta tional zones. Because accurate determination of phytomass and primary production is difficult, only gross estimates have been available until recently. However, in 1970, Bazilevich et al. published (in Russian) more accurate calculations, based on the rapidly accumulating literature, for the various thermal zones and bioclimatic regions of the earth. These authors calculated mean phyto mass and mean annual primary production for the various regions as dry mass (in tons) per hectare. On the basis of measurements of the areas covered by the individual regions, excluding rivers, lakes, glaciers, and permanent snow, total phytomass and total annual primary production for the various regions were obtained (see table). The sum of these figures is the phytomass and annual production of the land surface of the earth. In addition, the table gives corresponding data for the waters of the earth. The values involved are potential i. e. , they are based on natural vegetation uninfluenced by man.

Climate Dynamics of the Tropics

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Publisher : Springer Science & Business Media
ISBN 13 : 9401131562
Total Pages : 507 pages
Book Rating : 4.4/5 (11 download)

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Book Synopsis Climate Dynamics of the Tropics by : S. Hastenrath

Download or read book Climate Dynamics of the Tropics written by S. Hastenrath and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 507 pages. Available in PDF, EPUB and Kindle. Book excerpt: The first edition of my book "Climate and Circulation of the Tropics" was reasonably up to date to the middle of 1985. In a second printing in 1988 it was possible to complete a few literature references and to correct some misprints. However, vigorous research has taken place over the past five years in various areas of tropical climate dynamics, especially in the atmosphere-ocean mechanisms of climate anomalies, climate prediction, ocean circulation, and paleoclimates. Promising progress has also been made in the application of general circulation modelling to tropical climate problems. In the present second edition, named "Climate Dynamics of the Tropics", I have attempted to incorporate much of the recent work to late 1990. Chapters 8 and 9 have been essentially re-written, and major additions have been made to Chapters 4 and 12 in particular. I would like to acknowledge the continued support by the U.S. National Science Foundation over the past five years. B. Parthasarathy, Poona, and H. Lessmann, San Salvador, sent me updates of data series not easily accessible. I have benefitted from discussions with numerous colleagues in the United States and overseas. In the preparation of this second edition, Marilyn Wolff patiently transferred my illegible hand-written drafts onto word processor. Dierk Polzin and Dan Skemp assisted me with the creation of the page masters and the subject index and Christopher Collimore with the author index.

A Frequency Dictionary of Mandarin Chinese

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Publisher : Routledge
ISBN 13 : 1134049889
Total Pages : 401 pages
Book Rating : 4.1/5 (34 download)

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Book Synopsis A Frequency Dictionary of Mandarin Chinese by : Richard Xiao

Download or read book A Frequency Dictionary of Mandarin Chinese written by Richard Xiao and published by Routledge. This book was released on 2015-06-18 with total page 401 pages. Available in PDF, EPUB and Kindle. Book excerpt: A Frequency Dictionary of Mandarin Chinese is an invaluable tool for all learners of Mandarin Chinese, providing a list of the 5,000 words and the 2,000 Chinese characters (simplified) most commonly used in the language. Based on a fifty-million-word corpus composed of spoken, fiction, non-fiction and news texts in current use, the dictionary provides the user with a detailed frequency-based list, as well as alphabetical and part-of-speech indexes. All entries in the frequency list feature the English equivalent and a sample sentence with English translation. The Dictionary also contains thirty thematically organized lists of frequently used words on a variety of topics such as food, weather, travel and time expressions. A Frequency Dictionary of Mandarin Chinese enables students of all levels to maximize their study of Mandarin vocabulary in an efficient and engaging way. It is also an excellent resource for teachers of the language. Former CD content is now available to access at www.routledge.com/9780415455862 as support material. Designed for use by corpus and computational linguists it provides the full text in a format that researchers can process and turn into suitable lists for their own research work.

Fire and Plants

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Publisher : Springer Science & Business Media
ISBN 13 : 9400914997
Total Pages : 275 pages
Book Rating : 4.4/5 (9 download)

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Book Synopsis Fire and Plants by : William J. Bond

Download or read book Fire and Plants written by William J. Bond and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 275 pages. Available in PDF, EPUB and Kindle. Book excerpt: Large regions of the world are regularly burnt either deliberately or naturally. However, despite the widespread occurrence of such fire-prone ecosystems, and considerable body of research on plant population biology in relation to fire, until now there have only been limited attempts at a coherent conceptual synthesis of the field for use by students or researchers.

The Cerrados of Brazil

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Publisher : Columbia University Press
ISBN 13 : 0231505965
Total Pages : 409 pages
Book Rating : 4.2/5 (315 download)

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Book Synopsis The Cerrados of Brazil by : Paulo S.

Download or read book The Cerrados of Brazil written by Paulo S. and published by Columbia University Press. This book was released on 2013-02-05 with total page 409 pages. Available in PDF, EPUB and Kindle. Book excerpt: The massive grasslands of Brazil -- known as the cerrados -- which cover roughly a quarter of its land surface and are among the most threatened regions in South America, have received little media attention. This book brings together leading researchers on the area to produce the first detailed account in English of the natural history and ecology of the cerrado/savanna ecosystem. Given their extent and threatened status, the richness of their flora and fauna, and the lack of familiarity with their unique ecology at the international level, the cerrados are badly in need of this important and timely work.

A Study of TEFL Vocabulary

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Publisher :
ISBN 13 :
Total Pages : 450 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis A Study of TEFL Vocabulary by : Magnus Ljung

Download or read book A Study of TEFL Vocabulary written by Magnus Ljung and published by . This book was released on 1990 with total page 450 pages. Available in PDF, EPUB and Kindle. Book excerpt: A study of TEFL vocabulary contains an evaluation of the vocabulary encountered in 56 textbooks of English for Swedish secondary schools. The 56 textbooks together make up an electronically stored corpus of 1,437,474 words, which was evaluated from three points of view. were compared with the corresponding frequency band in an 18 million word corpus compiled at the University of Birmingham in the course of the work on the COBUILD dictionary. This comparison reveals clear differences between the two corpora, with the textbooks containing a much higher proportion of concrete everyday words than the COBUILD texts and a lack of many of the common abstract words need for an understanding of the language of the news media. of certain of the linguistic criteria for text typology suggested by D.Biber. With the help of these criteria, it was possible to show that the textbooks tend to be interactive and to have situated content and reported style, while the COBUILD texts seem to be edited, to have abstract content and more immediate style. in terms of the linguistic differences between British and American English. It was found that the linguistic orientation of both corpora is overwhelmingly British. described above, among them a list of the 9330 textbook lemmas with a fequency of 5 or more. Each lemma appears with its frequencies from the textbook and the COBUILD corpora and a difference coefficient indicating its relative frequency in the two corpora.

AS Science for Public Understanding

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Publisher : Heinemann
ISBN 13 : 9780435654665
Total Pages : 262 pages
Book Rating : 4.6/5 (546 download)

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Book Synopsis AS Science for Public Understanding by : Andrew Hunt

Download or read book AS Science for Public Understanding written by Andrew Hunt and published by Heinemann. This book was released on 2000 with total page 262 pages. Available in PDF, EPUB and Kindle. Book excerpt: Education policy encourages students to study a broad range of AS levels in their first post-16 year. The AS Science for Public Understanding course offers science for non-science specialists. This work aims to offer an understanding of science for those studying mainly arts A Levels

Vegetation history

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Publisher : Springer Science & Business Media
ISBN 13 : 940093081X
Total Pages : 808 pages
Book Rating : 4.4/5 (9 download)

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Book Synopsis Vegetation history by : B. Huntley

Download or read book Vegetation history written by B. Huntley and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 808 pages. Available in PDF, EPUB and Kindle. Book excerpt: The analysis of vegetation history is one of the prime objectives for vegetation scientists. In order to understand the recent composition of local floras and plant communities a second knowledge of species com position during recent millenia is essential. With the present concern over climate changes, due to human activities, an understanding of past vegeta tion distribution becomes even more important, since the correlation between climate and vegetation can often be used to predict possible impacts to crops and forests. I was very fortunate to receive the help of Drs. Webb and Huntley to compile this volume on vegetation history. They have collated an impres sive set of papers which together give an account of the vegetation history of most of the continents during the late-Tertiary and Quaternery periods. There are, however, gaps in the coverage achieved, most notably Africa, and Asia apart from Japan. The information in this book will nonetheless certainly be used widely by vegetation scientists for the regions covered in the book and much of it has relevance to the areas not explicitly described. The authors of the individual chapters have done their best to cover recent topics of interest as well as established facts. It is intended that a separate volume will be produced in the near future covering the vegetation history of Africa and Asia. I thank the editors of It fits well into the this volume for their commendable achievement.

Vegetation Dynamics

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Publisher : Springer Science & Business Media
ISBN 13 : 9401023441
Total Pages : 333 pages
Book Rating : 4.4/5 (1 download)

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Book Synopsis Vegetation Dynamics by : R. Knapp

Download or read book Vegetation Dynamics written by R. Knapp and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 333 pages. Available in PDF, EPUB and Kindle. Book excerpt: During the International Botanical Congress in Edinburgh, 1964, Mrs. 1. M. WEISBACH-J UNK of The Hague discussed a plan for preparation by her publishing company (Dr. W. Junk b.v.) of an international Handbook of Vegetation Science. She proposed a series that should give a comprehensive survey of the varied directions within this science, and their achievements to date as well as their objectives for the future. The challenge of such an enterprise, and its evident value for the further development of vegetation research, induced the undersigned after some consideration to accept the offer of the honorable but also burdensome task of General Editor. The decision was encouraged by a well formulated and detailed outline for the Handbook worked out by the Dutch phytosociolo gists J. J. BARKMAN and V. WESTHOFF. A circle of scholars from numerous countries was invited by the Dr. Junk Publishing Com pany to The Hague in January 1966 to draw up a list of editors and contributors for the parts of the Handbook. The outline and list have served since for the organization of the Handbook, with no need for major change. The different burdens of editors and authors have compelled quite different timings for completion of the individual sections.

The Ecology and Management of Grazing Systems

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Publisher : Cabi
ISBN 13 : 9780851993027
Total Pages : 0 pages
Book Rating : 4.9/5 (93 download)

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Book Synopsis The Ecology and Management of Grazing Systems by : John Hodgson

Download or read book The Ecology and Management of Grazing Systems written by John Hodgson and published by Cabi. This book was released on 1998 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The understanding and management of land resources used by grazing animals are of major importance to ecologists and agricultural and environmental scientists. This book fills a major gap in the market by synthesising a range of perspectives on grazing systems, drawn from plant science, animal science and ecology. It outlines the principles of herbage growth and competition; of animal nutrition and grazing behavior; and of the interactions of plant and animal factors that are central to an understanding of grazing systems. Chapters on the management of grazing systems cover both intensive and extensive systems (including rangelands) from all major agroecological zones of the world. The book is written by leading authorities from the USA, UK, Australia, New Zealand, South Africa, Israel and France. It represents a major contribution to the literature for advanced students and research workers concerned with plant science (especially grasslands), animal science (especially ruminants), and natural and agricultural ecosystems.

Grasses and Grasslands

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Publisher :
ISBN 13 : 9780806117782
Total Pages : 312 pages
Book Rating : 4.1/5 (177 download)

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Book Synopsis Grasses and Grasslands by : James R. Estes

Download or read book Grasses and Grasslands written by James R. Estes and published by . This book was released on 1982 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt: