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Showing 10 of 38,133 papers
Applications of Soft X-ray Spectromicroscopy in Material and Environmental Sciences

In soft X-ray spectromicroscopy, significant advances were made during last few decades, as a result of improvements in X-ray optics and greater availability of third-generation synchrotron sources. These advancements made this spectromicroscopic technique as one of the important analytical tools in several scientific disciplines (e.g., environmental and material sciences), since nanometer-scale chemical information under in situ conditions, which has not previously been available from other tools, can be obtained using this technique. Therefore, an increasing number of applications for imaging and quantification of chemically distinct components in a wide range of specimens, such as fully hydrated environmental and biological specimens, polymer composite materials with nanostructures, and novel nanomaterials is being reported. In this review, recent developments and applications of soft X-ray spectromicroscopy, with focus on scanning transmission X-ray microscopy (STXM), are described. Brief descriptions of the basic principles and generic instrumental setups of soft X-ray spectromicroscopy will be followed by various recent application examples of soft X-ray spectromicroscopy in material science, environmental science, etc., where knowledge of the heterogeneous distributions of chemical species and elemental compositions is considered important in understanding and explaining phenomena in each scientific disciplines.

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New Dimensions in Rongalite Chemistry: The Land of Opportunities in Organic Synthesis and Material Sciences

AbstractRongalite, first time reported in the chemical structure in 1905, also known as bruggolite or sodium formaldehyde sulfoxylate, having good solubility and stability in organic media, is not only a cheap and commercially available (in kg amount) reagent with a range of industrial applications for instance emulsion polymerization, an excellent decolouring agent, antioxidant in pharmaceutical development, and an antidote for heavy metals, but also used as an effective regents in a plethora of organic reactions particularly in redox reactions as a powerful reducing agent. More interestingly, in recent years, it has also shown its impact in material sciences for the preparation of CdTe, CoTe2, and Ag2Se thin films, nanowire networks, hollow nanospheres, copper nanoparticles (Cu‐Nps), CdTe‐quantum dots and so forth. Keeping in mind the importance of this vital reagent in both organic chemistry as well as in material sciences, herein I intended to report the recent developments along with a brief overview of old literature wherever necessary to showcase the utility of this valuable reagent. This particular review article not only covers the applications of this environmentaly benign reagent in organic synthesis but also its usefulness in material sciences in particular nanosciences has been exposed for the first time.

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The 3rd International Conference on Chemical Engineering Sciences and Applications 2017 (3rd ICChESA 2017)

THE THIRD INTERNATIONAL CONFERENCE OF CHEMICAL ENGINEERING SCIENCES AND APPLICATIONS(The 3rdICChESA 2017)September 20-21, 2017, Banda Aceh - INDONESIAAccepted, peer reviewed papers from the 3rd ICChESA 2017Edited byYunardi, Sri Aprilia, Cut Meurah Rosnelly, and Wahyu RinaldiChemical Engineering DepartmentSyiah Kuala UniversityBanda Aceh - INDONESIAPrefaceThe Third International Conference on Chemical Engineering Sciences and Applications 2017 (The 3rd ICChESA 2017) taking place in Banda Aceh, the Province of Aceh, Indonesia during 20-21 September 2017 was organized by the Chemical Engineering Department, Syiah Kuala University, Indonesia together with the Faculty of Chemical Engineering, Universiti Teknologi MARA (UiTM), Shah Alam, Malaysia in cooperation with the other two institutions: Chemical Engineering Department, Malikussaleh University and Lhokseumawe State Polytechnics of which both are from North Aceh, Indonesia. The conference addressed the important theme in supporting the sustainable development: “Strengthening Chemical Engineering Education, Research, and Innovation for Sustainable Development”. The objective of the 3rd ICChESA 2017 was to gather scientists, researchers, scholars, educators, professionals, and students in different fields of chemical engineering from ASEAN and beyond to share knowledge, exchange ideas, and explore possibilities of building cooperation networking.The Proceedings consists of accepted papers and presented by researchers from different countries, among others, Indonesia, Malaysia, Thailand, Pakistan, Iran and Japan. The papers are categorized under seven topics in the area of chemical engineering, namely: Energy Resources, Control System and Computational Fluid Dynamics, Environmental Engineering, Nan otechnology, Chemical Engineering Fundamental, Food and Biochemical Engineering, and Chemical Reaction Engineering, Polymer and Composite Materials.

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Anti-Chemical Properties of Modular Protective Material

Previously, we developed the principle of constructing modular materials with specified properties, according to which organometallic composites, with nanoscale enzyme complexes introduced into them, are applied to a unified fabric platform. The resulting composites become a new platform for heterogeneous biocatalysis. Such a platform has high stability and good catalytic selectivity. The aim of the work is to study the properties of a unified fabric platform and to establish the possibility of giving materials (tissues) anti-chemical protective properties. The paper analyzes scientific and practical information on the production of composite fibrous materials with frame fibrous layers. The properties of a unified tissue platform and the mechanisms of protective action due to the enzymecontaining formulation applied to it are investigated. As a unified fabric platform on which other special modules are applied, it is proposed to use para-aramid protective fabric (Rusar fiber), as well as other types of fabrics – mixed aramid-viscose, aramid-cotton, aramid-polyacrylate, metaaramide (Nomex fiber). The physical properties and chemical structure of aromatic polyamides, possible directions for the production of aramid fibers, the structure and structure of aramid fibers, the mechanisms of chemical processes in polyinide compositions of various compositions are considered. Approaches to giving materials (tissues) anti-chemical protective properties are determined. The catalytic characteristics of fibrous materials functionalized by enzyme-polyelectrolyte complexes carrying out hydrolysis of organophosphorus compounds and mycotoxins have been studied.

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