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Cyclic ß-Ketoesters

Cyclic ß-Ketoesters

M A Metwally; E G Sadek

Nova Science Publishers Inc
2010
nidottu
The chemistry of cyclic ss-ketoesters has received considerable attention because they serve as highly important intermediates in many organic synthesis. The wide application of these compounds in organic synthesis, depends chiefly on the reactivity of the methylene group, and the ready hydrolysis of the ester group, and its substituted derivatives to carboxlic acids and ketones. The syntheses and reactions of cyclic ss-ketoesters are reviewed in a formal way.
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Spectroscopic Identification Of Organic Molecules

Spectroscopic Identification Of Organic Molecules

Mohamed Hilmy Elnagdi; Kamal Usef Sadek; Ramadan Ahmed H Mekheimer

World Scientific Publishing Co Pte Ltd
2018
sidottu
Researchers in the fields of organic synthesis, pharmaceutical research as well as cosmetic and agrochemicals industries need to confirm the structures of products they obtain. This was previously a time-consuming a process that took up much time. Spectroscopic methods however, made it easier, and initially R and UV helped chemists conclude structures one way or another. Initially 1D NMR, 2D NMR and sophisticated NMR measurements like COESY and NOESY were of great assistance. We demonstrate principles to conclude structures of our simple molecules, mainly heterocycles of interest for researchers in fields indicated above.However, it is insufficient to only understand the principles, and one should also master problem solving and thinking. We demonstrate simple problems like the utility of coupling constants, NOE, COESY and NOESY and show how firm conclusions are obtained in real life. Most NMR books usually demonstrate these principles utilizing a pit sophisticated examples. The methodology suggested by us is simpler and quite useful for researchers in heterocyclic chemistry where combination of proton and carbon NMR should be dealt together.Our research results previously been used intensively (Cf. citations in Google Scholar) and still draw attention. Students in the fields indicated will find this book of value to sign the spectra of the molecules they synthesize. Researchers in the field of heterocyclic chemistry as well as instructors in the field of structure proof utilizing spectroscopic identification will also find this book of interest.
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Fundamentals of Intelligent Transportation Systems Planning

Fundamentals of Intelligent Transportation Systems Planning

Mashrur Chowdhury; Adel W. Sadek

Artech House Publishers
2003
sidottu
Designed for those involved with intelligent transportation systems (ITS), this volume guides the reader through the fundamentals that are essential for planning and operations. This reference focuses on traffic flow fundamentals and application areas, issues and principles. It includes discussion of security concerns in transportation systems, seeking to allow a greater degree of confidence in the success of your projects before actual implementation.
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Detecção precoce da osteoporose entre os funcionários da Universidade Minia

Detecção precoce da osteoporose entre os funcionários da Universidade Minia

Amany Seedhom; Eman Mahfouz; Refaat Sadek

Edicoes Nosso Conhecimento
2025
nidottu
Este um estudo explorat rio comparativo transversal muito interessante e bem concebido, que visa a dete o precoce da osteoporose entre os funcion rios da Universidade Minia e tamb m estudar os fatores de risco mais importantes que podem contribuir para a ocorr ncia da osteoporose. Tamb m foi realizada uma campanha de sensibiliza o dos funcion rios sobre a osteoporose e os seus determinantes, com o objetivo de prevenir, adiar ou retardar a progress o da doen a. O elevado ndice de tabagismo, o estilo de vida sedent rio, bem como h bitos alimentares inadequados e antecedentes familiares tiveram um grande impacto e predisposi o para a ocorr ncia de osteoporose e osteopenia entre eles. Quase um quarto dos participantes do estudo foram diagnosticados com osteoporose atrav s de tomografia computadorizada quantitativa em 1-4 v rtebras lombares na unidade de TC. Os resultados do estudo confirmaram que a osteoporose ocorre duas vezes mais em mulheres do que em homens e est positivamente correlacionada com a idade.
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Cooperative Communications and Networking

Cooperative Communications and Networking

K. J. Ray Liu; Ahmed K. Sadek; Weifeng Su; Andres Kwasinski

Cambridge University Press
2008
sidottu
Presenting the fundamentals of cooperative communications and networking, this book treats the concepts of space, time, frequency diversity and MIMO, with a holistic approach to principal topics where significant improvements can be obtained. Beginning with background and MIMO systems, Part I includes a review of basic principles of wireless communications and space-time diversity and coding. Part II then presents topics on physical layer cooperative communications such as relay channels and protocols, performance bounds, multi-node cooperation, and energy efficiency. Finally, Part III focuses on cooperative networking including cooperative and content-aware multiple access, distributed routing, source-channel coding, and cooperative OFDM. Including end-of-chapter review questions, this text will appeal to graduate students of electrical engineering and is an ideal textbook for advanced courses on wireless communications. It will also be of great interest to practitioners in the wireless communications industry. Presentation slides for each chapter and instructor-only solutions are available at www.cambridge.org/9780521895132.
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