Mineral chemistry

Ebook "Chemistry of maillard reactions in processed foods" s aim at presenting chemical background information or an introduction and clear-cut overview on the chemistry related to specific topics in this area. Typical topics thus include: ccompound classes in foods—their chemistry and properties with respect to the foods (e.g. sugars, proteins, fats, minerals,...); contaminants and additives in foods—their chemistry and chemical transformations;...

64p tracanhphuonghoa1007 22-04-2024 7 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 "Carbon sequestration in agricultural soils: A multidisciplinary approach to innovative methods" reports findings of two methods for soil carbon sequestration related to their application in agricultural field trials. These methods are definitively based on the innovative understanding of soil organic matter chemistry as supramolecular association of small molecules the protection from mineralization of labile soil molecules by the hydrophobic domains present in humified mature compost amended to soils.

316p coduathanh1122 27-03-2024 5 1   Download

Ebook "Infrared spectroscopy of minerals and related compounds" provides an overview of the application of IR spectroscopy in mineralogical investigations, as well as modern trends in the IR spectroscopy of minerals. It includes the most important methodological aspects; characteristic IR bands of different chemical groups and coordination polyhedra; application of IR spectroscopy to the investigation of the crystal chemistry of amphiboles, phyllosilicates, tourmalines etc.;...

1116p duongthandue0501 28-02-2024 2 1   Download

Ebook "Cement and concrete chemistry" describes cement clinker formation. It covers multicomponent systems, clinker phase structures and their reactions with water, hydrate composition and structure, as well as their physical properties. The mineral additions to cement are described as are their influence on cement-paste properties. Special cements are also discussed.

705p nhanphanguyet 28-01-2024 10 2   Download

Part 2 book "Safety-scale laboratory experiments for chemistry for today general, organic, and biochemistry" includes content: Reactions of aldehydes and ketones; reactions of carboxylic acids, amines, and amides; the synthesis of aspirin and other esters; identifying functional groups in unknowns; synthetic polymers; dyes, inks, and food colorings; a study of carbohydrates; preparation of soap by lipid saponification; isolation of natural products - trimyristin and cholesterol; amino acids and proteins;... and other contents.

262p muasambanhan03 02-01-2024 3 2   Download

Part 1 of ebook "Food chemistry (4th revised and extended edition)" provides readers with contents including: water; phase transition of foods containing water; amino acids, peptides, proteins; carbamoyl and thiocarbamoyl derivatives; mutagenic heterocyclic compounds ; enzymes; lipids; crystalline structure, melting points; carbohydrates; chemical reactions and derivatives; aroma compounds; aroma extract dilution analysis; vitamins; minerals; food additives;...

510p lytamnguyet 04-08-2023 4 3   Download

Continued part 1, part 2 of ebook "Food chemistry (4th revised and extended edition)" provides readers with contents including: food contamination; milk and dairy products; eggs; meat; fish, whales, crustaceans, mollusks; edible fats and oils; cereals and cereal products; legumes; vegetables and vegetable products; fruits and fruit products; sugars, sugar alcohols and honey; alcoholic beverages; coffee, tea, cocoa; spices, salt and vinegar; drinking water, mineral and table water;...

604p lytamnguyet 04-08-2023 8 4   Download

Part 2 book "Biochemistry - With clinical concepts and case studies" includes content: Metabolism of amino acids; ontegration of metabolism, metabolism of nucleotides, mineral metabolism, introduction to bioorganic chemistry; overview of biophysical chemistry; tools of biochemistry; immunology; genetics, acquired immunodeficiency syndrome.

470p oursky02 06-08-2023 5 3   Download

Polyurethane foams have good shock-absorbing properties. This article discusses the study of the physical, dynamic analysis, and microstructure of filled polyurethane foams (PUR). We used mineral fillings nanoparticles of titanium dioxide (TiO2 ) and calcium carbonate (C1) to support and strengthen the foam cell structure to develop shock absorption and thermal resistance properties. Dynamic mechanical analysis (DMA) and compression tests compared the mechanic characterization results with different modelling approaches.

25p lyhuyenthu 31-01-2023 7 3   Download

In this study, structural, thermal, and hydrogen (H2 ) adsorption properties of natural analcime-rich zeolite tuff (A) from Trakya (Turkey) and that of acid-treated forms investigated. Analcime mineral was treated with 0.1, 0.5, 1, 2, and 3 M HCl solutions at 80 °C for 5 h.

12p lyhuyenthu 31-01-2023 8 2   Download

(BQ) Ebook part 2 presents the following content: Chapter 9: Understanding Transport in MFI-Type Zeolites on a Molecular Basis; Chapter 10: Modeling Layered-Mineral Organic Interactions; Chapter 11: Status of Technology and Perspectives for Portable Applications of Direct Methanol Fuel Cells; Chapter 12: Semiconductor Block Copolymers for Photovoltaic Applications; Chapter 13: Switching-on: The Copper Age; Chapter 14: Understanding Single-Molecule Magnets on Surface; Chapter 15: Sculpting Nanometric Patterns: The Top-down.

177p runordie7 30-08-2022 5 2   Download

This article highlights the results of a mechanochemical modification method of epoxy composite materials and coatings on their base. It proves the mechanochemical activated components of composition to be the most acceptable for structuring when producing composite materials. It also states the increase of mechanical properties of epoxy heterocomposite coatings with mechanically activated particles by 25%–40%.

6p langthannam 29-12-2021 12 0   Download

2,2’-[1,4(1,3)-Phenylenedi(methylene)]bis-1H-benzimidazole derivatives were obtained from the reaction of 1,4- or (1,3)-bisiminoester hydrochloride and o-phenylenediamine derivatives under microwave irradiation. Ester and hydrazide derivatives were prepared from a free NH group. This practical method revealed good results for yield, reaction time, and quick isolation of products.

7p langthannam 29-12-2021 12 0   Download

On the basis of slope analysis, the compositions of the extracted species were formulated as Pr(NO3)3.2Cyanex 921 and Pr(NO3)3.Cyanex 923. The percentage of extraction of Pr(III) was found to decrease with increases in temperature. The standard enthalpy and entropy changes were negative owing to the complexation with decrease in randomness without a compensatory disruption of the hydration sphere of the metal ion. Mineral acids like hydrochloric acid (0.008 M) and sulfuric acid (0.03/0.02 M) were effective for the stripping of Pr(III) from the loaded organic phase with 0.

8p langthannam 29-12-2021 9 1   Download

Magnesium borates can be used as detergent compounds or hydrocarbon catalyzers and in the ceramics industry for superconductor material manufacture owing to their high elastic coefficient and resistance to corrosion at high temperatures. In the present study, the synthesis of magnesium borate was facilitated via a novel ultrasonic method of mixing and the identification and characterization of the material were carried out via X-Ray diffraction (XRD), Fourier transform infrared (FT-IR), and Raman spectroscopies, and the B2 O3 content was determined through titration.

14p langthannam 29-12-2021 12 0   Download

The ability of the hyperthermophilic archaeon Sulfolobus solfataricus P2 to grow on organic and inorganic sulfur sources was investigated. A sulfur-free mineral medium was employed with different sources of carbon. The results showed that inorganic sulfur sources display growth curve patterns significantly different from the curves obtained with organic sulfur sources. Combustion of fossil fuels leads to the atmospheric emission of sulfur oxides that contribute to acid rain and air pollution.

12p langthannam 29-12-2021 13 0   Download

Synthesis of the magnesium type of the mineral boracite (Mg 3 B7 O13 Cl) was studied. Several parameters affecting boracite synthesis were investigated. The raw materials selected were magnesium chloride hexahydrate (MgCl 2 .6H2 O), magnesium oxide (MgO), and boron oxide (B2 O3). Reaction temperatures were selected between 600 ◦ C and 900 ◦ C. Moreover, three different reaction times of 4, 1, and 0.5 h were studied with the determined optimum molar ratio, reaction temperature, and reaction medium.

13p langthannam 29-12-2021 12 1   Download

The present work examıned the use of biochar derived from tea waste as a novel electrode material. For the fabrication of the biochar electrode, suitable amounts of biochar and graphite were mixed with mineral oil for the first time. The electrochemical performance of the biochar-modified carbon paste electrode (BCPE) was measured by various cyclic voltammetric reactions for several redox systems. The factors affecting the electrode kinetics of BCPE surfaces were examined and optimized. The BCPE was applied as transducer in a glucose biosensor.

11p langthannam 29-12-2021 8 0   Download

Liquid–liquid extraction of Au(III) from aqueous sodium malonate medium using 2-octylaminopyridine (2-OAP) as an extractant in xylene was achieved. The current work explored the influence of several experimental parameters such as pH, weak acid concentration, extractant concentration, equilibrium time, stripping agents, and aqueous:organic volume ratio on the extraction of Au(III). The experimental results showed that the Au(III) was quantitatively extracted to about 99.5% by 0.05 M 2-OAP in 0.05 M malonate at 5.0 pH.

22p tudichquannguyet 29-11-2021 5 2   Download