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Apr 17, 2018 Natural medicines were the only option for the prevention and treatment of human diseases for thousands of years. Natural products are important sources for drug development. The amounts of bioactive natural products in natural medicines are always fairly low. Today, it is very crucial to develop effective and selective methods for the extraction and isolation of …
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Chemical vapor deposition (CVD) is a vacuum deposition method used to produce high quality, and high-performance, solid materials. The process is often used in the semiconductor industry to produce thin films.. In typical CVD, the wafer (substrate) is exposed to one or more volatile precursors, which react and/or decompose on the substrate surface to produce the desired …
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Feb 06, 2019 There is a demand for new chemical reaction technologies and associated engineering aspects due to on-going transition in energy and chemistry associated to moving out progressively from the use of fossil fuels. Focus is given in this review on two main aspects: i) the development of alternative carbon sources and ii) the integration of renewable energy in the …
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Food Packaging - Principles and Practice (3rd Edition) (Robertson,2012)
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Highly effective microwave catalytic oxidative dehydrogenation of propane by CO 2 over V-La-doped dendritic mesoporous silica-based microwave catalysts Zhongchen Ma, Wentao Xu, Qige Wang, Qi Zhou, Jicheng Zhou
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Jul 22, 2021 Plastics pollution is causing an environmental crisis, prompting the development of new approaches for recycling, and upcycling. Here, we review challenges and opportunities in chemical and ...
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Jul 25, 2016 The nanomaterials have been widely used in various fields, such as photonics, catalysis, and adsorption, because of their unique physical and chemical properties. Therefore, their production methods are of utmost importance. Compared with traditional synthetic methods, the template method can effectively control the morphology, particle size, and structure during …
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Jun 06, 2018 Glutaraldehyde possesses unique characteristics that render it one of the most effective protein crosslinking reagents. It can be present in at least 13 different forms depending on solution conditions such as pH, concentration, temperature, etc. Substantial literature is found concerning the use of glutaraldehyde for protein immobilization, yet there is no agreement …
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May 09, 2014 Direct conversion of CH 4 is potentially more economical and environmentally friendly but is challenging because CH 4 exhibits high C–H bond strength (434 kJ/mol), negligible electron affinity, large ionization energy, and low polarizability ().In the pioneering work of Keller and Bhasin in the early 1980s, CH 4 was activated with the assistance of oxygen ().
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Microwave-Assisted Synthesis of Magnetic Hydroxyapatite for Removal of Heavy Metals from Groundwater [Research Article] Chem. Eng. Technol. 2018 , vol. 41, pp. 553–562 Jaqueline Daniel-Gromke, Nadja Rensberg, Velina Denysenko, Walter Stinner, Tina Schmalfu , Mattes Scheftelowitz, Michael Nelles, Jan Liebetrau
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Plasma etching is widely used for etching nanoscale features because it can produce vertical sidewall profiles with little or no undercut. An example is shown in Figure 5.19.This anisotropic feature can be further enhanced by allowing the deposition of certain passivating films to occur along vertical sidewalls during the plasma reaction.
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Product from the polymerization reactor (referred to as the polymer melt) may be sent directly to fiber spinning and drawing operations (6). Alternatively, the polymer melt may be chipped or pelletized (7), put into product analysis bins (8), and then sent to product storage (9) before being loaded into hoppers (10) for shipment to the customer.
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Silver nanoparticles (NPs) have been the subjects of researchers because of their unique properties (e.g., size and shape depending optical, antimicrobial, and electrical properties).A variety of preparation techniques have been reported for the synthesis of silver NPs; notable examples include, laser ablation, gamma irradiation, electron irradiation, chemical reduction, …
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