1,721,163 research outputs found
Nanostructured mixed transition metal oxides for high performance asymmetric supercapacitors: Facile synthetic strategy
Full text linkAbstract not availableSanaz Tajik, Deepak P. Dubal, Pedro Gomez-Romero, Amir Yadegari, Alimorad Rashidi, Bahram Nasernejad, Inamuddin, Abdullah M. Asir
Industrial applications of green solvents., Volume 1 / Materials research foundations ;, v. 50./ edited by Inamuddin, [and 2 others].
No full text2.1.7 Mannich-type reactionsIncludes bibliographical references and index.The book focuses on new applications of green solvents (water, ionic liquids, supercritical carbon dioxide, terpenes). Keywords: Green Chemistry, Pollution Control, Hazardous Waste, Environmental Pollution, Green Solvents, Ionic Liquids, Supercritical Carbon Dioxide, Terpenes, Chemical Synthesis, Lipase-catalyzed Reactions, Organic Synthesis, Esterification, Gas Separation Membranes, Environment-friendly Products, Low Energy Requirement Processes, Alternatives to Hazardous Substances, Spiroheterocycles in Water, Sustainable Organic Synthesis, Chemical Industry, Pharmaceutical Industry, Paint I.Intro; front-matter; Table of Contents; Preface; 1; Plant Cell Culture Strategies for the Production of Terpenes as Green Solvents; 1. Introduction; 2.1 Essential oil as a source of green solvents; 2.2 Green solvents as an alternative to chemical solvents; 2.3 Essential oil yield and limiting factors for production in wild grown plants; 3.1 Biotechnological production of terpenes; 3.2 Approaches to improve the yield of terpenes produced by plant cell culture technology; 3.3 Terpenes in callus and cell cultures; 3.4 Terpenes in shoot cultures; 3.5 Terpenes in hairy roots4.1 Genetic engineering of plants for enhanced terpenoid biosynthesisConclusion; References; 2; Ionic Liquids as a Green Solvent for Lipase-Catalyzed Reactions; 1. Introduction; 2. Lipases: An overview; 3. ILs in enzymatic reactions: Advantages and merits; 4. ILs properties and featured characteristics in lipase stabilization; 4.1 Stabilization and activation of lipases in ionic liquids (ILs); 4.2 Methods of stabilization of lipases in ILs; 5. Factors influencing IL-lipase reactions; 5.1 IL composition; 5.2 IL polarity; 5.3 IL viscosity; 5.4 pH; 5.5 Water content5.6 Temperature and thermal stability5.7 Selectivity; 5.8 Product purification; 6. Lipases and ILs in lipids reactions; 6.1 IL-lipase-catalyzed biodiesel synthesis; 6.2 Synthesis of esters and other products in ionic liquids; 6.3 Ionic liquids: The large-scale promise; 7. Recyclability of ILs and lipase; 8. Kinetics parameters of lipases in ILs; 9. Limitations and concerns over ILs; 10. The outlook for ILs in industrial applications; References; 3; Water in Organic Synthesis as a Green Solvent; 1. Introduction; 1.1 The development of green chemistry1.2 Green chemistry and its requirements in organic synthesis1.3 Green and alternative solvents in organic synthesis; 1.4 Water as a green solvent in organic synthesis; 2. On water reactions and concept of micellar catalysis in organic synthesis; 2.1 On water reactions; 2.2 Micellar catalysis; 3. Enhancement in rate and yield of organic reactions; 4. Improvement in chemo-, enantio-, regio- and stereoselectivity; 5. Towards milder reaction conditions and catalyst-free synthesis; 6. Simplification in the course of workup; 7. Enhancement in recycling the catalyst; Conclusion; References; 4Industrial Application of Ionic Liquids in the Paint Industry1. Introduction; 2. A short history of paints; 3. Traditional solvents in the paint industry; 4. Alternatives to the traditional solvents, ionic liquid (IL); 4.1 Cations for the ILs; 4.2 Anions for the ILs; 5. Ionic liquids in the paint industry; Conclusion; References; 5; An Overview of Green Solvents in Sustainable Organic Synthesis; 1. Introduction; 2. Green solvents; 2.1 Water; 2.1.1 Oxidations; 2.1.2 Dehydrogenation; 2.1.3 Allylations; 2.1.4 Coupling reactions; 2.1.5 Heck reaction; 2.1.6 Wittig reaction1 online resourc
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Advanced applications of polysaccharides and their composites Materials research foundations ;, v. 73./ edited by Amir Al-Ahmend and Inamuddin.
No full textIncludes bibliographical references and index.Polysaccharides and their composites are highly promising materials for food, pharmaceutical and biomedical applications; including drug delivery, tissue engineering and packaging. Fiber- and nano-reinforced composites are good alternatives to non-biodegradable petroleum-based polymers. The great advantage of these materials is that they are both environment friendly and nontoxic. Keywords: Polysaccharides, Polysaccharide Composites, Drug Delivery, Tissue Engineering, Pharmaceutical Packaging, Food Packaging , Environment Friendly Materials, Nontoxic Materials, Wound-Healing Sponge, Skin Lesions, Chitosan Composites, Nanocellulose, Starch-Based Composites.1 online resource (249 p.)
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
Hybrid Inorganic‐Organic White Light Emitting Diodes
No full textThis chapter reviews the state of the art of materials, technologies, characterizations, process and challenges concerning hybrid white light‐emitting diodes (LEDs). Here, for a “hybrid LED” we mean a device based on a layer of organic phosphors (or a mix of inorganic and organic ones) pumped by a high‐energy inorganic LED. Light is emitted by a frequency down‐conversion (sometimes simply named color‐conversion) process. Benefits and weak spots of this technology are investigated with a special attention for the materials involved into the process of frequency down‐conversion, in order to envisage the future impact of the hybrid lighting technology among the well‐established inorganic ones
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