Chemical modifications

In this research, in an attempt to make use of the kaolin resources in Vietnam, we present a synthetic process of zeolite A via hydrothermal from kaolinite, together with the modification process of zeolite A using different metallic cations. The characteristics of the prepared zeolite LTAs such as chemical composition and crystalline structure, as well as their catalytic activity in the methanation reaction of carbon dioxide (CO2) to methane (CH4) were extensively investigated.

8p dianmotminh02 03-05-2024 3 1   Download

Especially, active metals require the modification maximum to escape the natural corrosion or passivation. The retention of sound performance of the metals as well as extension of their lifetime can be achieved by surface modification of coating formation. Chemical coating is one of the simple and low-cost methods of coating with great versatility including pre-treatment and post-treatment. This paper includes the most widely used inorganic and organic chemical coating methods and their fewer details and their future outlooks.

20p dianmotminh02 03-05-2024 5 1   Download

The article will be focused on methods of chemical modification of NR and the use of improved traditional fillers such as carbon black (CB) and silica. Modification reactions include epoxidation, hydrogenation, and grafting vinyl monomers onto NR molecules. Some methods of surface modification of NR film were also reviewed. Thanks to modification the NR degree of unsaturatiton is decrease that leads to its enhanced aging resistance.

15p dianmotminh02 03-05-2024 3 2   Download

Ebook "Modified nucleic acids" spans diverse aspects of modified nucleic acids, from chemical synthesis and spectroscopy to in vivo applications, and highlights studies on chemical modifications of the backbone and nucleobases. Topics discussed include fluorescent pyrimidine and purine analogs, enzymatic approaches to the preparation of modified nucleic acids, emission and electron paramagnetic resonance (EPR) spectroscopy for studying nucleic acid structure and dynamics, non-covalent binding of low- and high-MW ligands to nucleic acids and the design of unnatural base pairs.

280p ladongphongthanh1008 22-04-2024 3 1   Download

Ebook "Sustainable innovations in textile chemistry and dyes" details two elements of textile chemistry namely- sustainable/eco-friendly dyes and green chemistry. It presents latest topics in sustainable dyeing techniques, low impact dyeing methods, wool dyeing techniques and green chemistry. Certain case studies are also highlighted.

97p tracanhphuonghoa1007 22-04-2024 3 3   Download

Ebook "Ultrasound technology in dairy processing" provides an overview of the use of ultrasound in various dairy applications, highlighting their significant benefits for the dairy industry, including energy savings and product improvement. It describes in detail the physical and chemical effects of high- and low-frequency power ultrasound in specific applications such as emulsification, ultrafiltration, crystallisation, inactivation of microbes, functionality modifications of secondary dairy products and fat separation.

46p tracanhphuonghoa1007 22-04-2024 6 3   Download

Ebook "Chemistry and technology of honey production" explains and discusses honey and its production from a chemical perspective. It outlines why honey is a special and unique food, being produced by bees from the nectar of plants or from secretions of living parts of plants. Although glucose and fructose are the main constituents of honey, its overall composition is far from being simple or uniform: other substances such as organic acids, enzymes, or minerals are found in varying amounts.

47p tracanhphuonghoa1007 22-04-2024 5 3   Download

Ebook "Food packaging materials (SpringerBriefs in Molecular science)" describes how the final properties of a food packaging material can be influenced through chemical modifications in the structure and composition of the used components. The authors also cover potential chemical reactions of food packaging materials that may affect their performance.

78p tudohanhtau1006 29-03-2024 4 1   Download

Part 1 book "Advances in chemical engineering" includes content: Application of chebyshev polynomials to calculate density and fugacity using saft equation of state to predict asphaltene precipitation conditions; based on common inverted microscope to measure UV vis spectra of single oil gas inclusions and colour analysis; challenging evaluation of the hybrid technique of chemical engineering - proton NMR technique for food engineering; modelling approach for redesign of technical processes; application potential of food protein modification,... and other contents.

334p muasambanhan09 16-03-2024 3 1   Download

Part 1 book "Applied chemistry and chemical engineering (Vol 2 - Principles, methodology and evaluation methods)" includes content: Polymer–graphene nanocomposites - A smart material for next generation applications; modification of waste polystyrene food containers and study of its efficiency as an oil spill cleanup; technical note on surface modification of silica by epoxy resin;... and other contents.

179p muasambanhan09 16-03-2024 5 1   Download

Part 2 book "Applied chemistry and chemical engineering (Vol 1: Mathematical and analytical techniques)" includes content: Model-Based investigation of transport phenomena in WDNs, photoresponsive materials containing azomoieties—a facile approach in molecular imprinting, a note on preparation of nanofilter from carbon nanotubes, control of fluidic jet repulsion in the electrospinning process, modification of urea–formaldehyde resin with collagen biopolymers,.... and other contents.

178p muasambanhan08 01-03-2024 4 1   Download

Part 2 book "Neuroscience" includes content: The auditory system, the vestibular system, the chemical senses, lower motor neuron circuits and motor control, upper motor neuron control of the brainstem and spinal cord, modulation of movement by the basal ganglia, modulation of movement by the cerebellum, eye movements and sensory motor integration, the visceral motor system, early brain development, construction of neural circuits, modification of brain circuits as a result of experience.

322p muasambanhan03 02-01-2024 3 2   Download

Ebook "Growth and form of self-organized branched crystal pattern in nonlinear chemical system" introduces the oscillatory reaction and pattern formation in the Belousov-Zhabotinsky (BZ) reaction that became model for investigating a wide range of intriguing pattern formations in chemical systems. So many modifications in classic version of BZ reaction have been carried out in various experimental conditions that demonstrate rich varieties of temporal oscillations and spatio-temporal patterns in non- equilibrium conditions.

79p lamquandat 28-12-2023 5 2   Download

Ebook "Functional starch and applications in food" discusses functional starch and its applications in food, focusing on starches with possible health benefits or novel applications. Covering slowly digested starch, resistant starch, porous starch, starch microemulsions, microcrystalline starch and noncrystallization starch and their applications, this book provides a valuable reference for graduate students and research professionals in the food and chemical industries.

229p lamquandat 28-12-2023 4 2   Download

Ebook "Sol-gel science: The physics and chemistry of sol-gel processing" emphasizes the science behind sol-gel processing with a chapter devoted to applications. The first chapter introduces basic terminology, provides a brief historical sketch, and identifies some excellent texts for background reading. Chapters 2 and 3 discuss the mechanisms of hydrolysis and condensation for nonsilicate and silicate systems. Chapter 4 deals with stabilization and gelation of sols.

463p loivantrinh 29-10-2023 10 4   Download

Part 1 book "Textbook of veterinary physiological chemistry" includes content: Chemical composition of living cells, amino acid modifications, properties of enzymes, protein structure, enzyme kinetics, protein digestion, amino acid catabolism, transamination and deamination reactions, glutamine and ammonia,.... and other contents.

351p oursky05 20-09-2023 6 1   Download

This review introduces basic information of resistant starches including their type and structure. There are four types of RS which contain different structure, physiologically beneficial effect and formation. Theoretically, there are three ways of resistant starch formation: (a) chemical modification, (b) physical modification and (c) enzymatic modification.

5p vidoctorstrange 06-05-2023 7 3   Download

This review introduces basic information about slow digesting starch (SDS): chemical structure, modification, physiological effect and application. Generally, the structural feature of SDS is an optimal mix of semi crystalline and amorphous material.

6p vidoctorstrange 06-05-2023 2 2   Download

This work reports the surface modification of polyacrylonitrile (PAN) fibers by graft copolymerization to ensure the decoration of homogenous and dense Ag nanoparticles. Two facile and subsequent modification processes resulted in a PAN fiber composite with an intact fibrous structure, sufficiently conductive for antistatic application and antibacterial activity. In the first step, some chemically attractive monomers and monomer mixtures, such as acrylic acid (AA), AA-itaconic acid (AA-IA), AA-acrylamide (AA-AAm), were introduced to the fiber surface by grafting.

15p lyhuyenthu 31-01-2023 6 2   Download

Cellulose nanowhiskers (CWs) extracted from cotton fibers were successfully modified with distinct anhydrides structures and used as additives in poly(vinyl alcohol) (PVA) nanocomposite films. The surface modification of CWs was performed with maleic, succinic, acetic or phthalic anhydride to compare the interaction and action the carboxylic groups into PVA films and how these groups influence in mechanical properties of the nanocomposites.

10p vihermione 06-01-2023 12 2   Download