Chemical properties

Manufactured dyes are notably troublesome chemical toxins. The industrial wastes of these dyes are exceedingly noxious to aerobic and aquatic life and can cause compounds that show carcinogenic, mutagenic, and neurotoxic effects. In this study, cadmium imidazolate frameworks were synthesized by a solvothermal method from cadmium acetate and 2-methylimidazole in an ethanol/methanol mixture.

7p vikwong 29-09-2024 3 1   Download

Cordierite is the substrate that posseses a low thermal expansion coefficient, good thermal shock resistance, excellent mechanical properties, and chemical resistance. Thus, cordierite is widely used as substrate for catalysts in hightemperature applications like gaseous treatment.

7p vikwong 29-09-2024 2 1   Download

The article presents some results of investigating the effective adsorption ratio of base oil SN 100 on silica gel, determination of physico-chemical, electrical properties, and voltage stability of the oil fraction which is separated from base oil SN 100 by adsorption method on silica gel with the appropriate ratio of silica gel/base oil SN 100 = 140/100.

5p vikwong 29-09-2024 2 1   Download

Zeolite seed-based mesoporous aluminosilicate material MSU-S is normally synthesized from pure chemicals. In the study, MSU-S material was synthesized using natural resources such as rice husk, and kaolin in Vietnam. Here, a systematic investigation is conducted to find the relationship between the synthesis conditions (aging time, hydrothermal time, hydrothermal temperature, pH environment) and the formation of mesoporous structure, as well as the material properties.

6p vikwong 29-09-2024 6 1   Download

Drying shrinkage is the main cause of early age cracking of concrete and mortar. A wide range of research has been conducted to reduce the drying shrinkage, including using fibres or chemical admixtures. This paper investigated the effect of shrinkage reducing admixture on the flexural strength, compressive strength, drying shrinkage, water absorption and porosity of mortar.

13p vifilm 24-09-2024 2 1   Download

This study aims to investigate the effectiveness of the green microwave technique in producing 1T/2H-MoS2 nanomaterials using polyol solvents. The paper presents a thorough analysis of the structural and property characteristics of the synthesized materials and elucidates the underlying chemical mechanism that governs the formation of hybrid-phase nanostructures. Additionally, the role of polyol solvents in the practical synthesis of nano MoS2 under microwave heating is evaluated and explained.

15p xuanphongdacy06 18-09-2024 1 1   Download

Magnolia citrata Noot. & Chalermglin was collected in the Central Highlands of Vietnam and examined for its essential oils’ chemical compositions and antimicrobial activities. The essential oils were obtained from the leaves, twigs, and stem barks of M. citrata using hydrodistillation, then analyzed using Gas Chromatography-Mass Spectrometry (GC-MS) and evaluated for antimicrobial activities.

10p dianmotminh02 03-05-2024 3 2   Download

CuO nanoparticles were synthesized by alcohol-assisted hydrothermal method at various pH values, using sodium hydroxide as a precursor for pH control. The chemical composition, morphological and structural properties of the obtained CuO nanoparticles were investigated by the Raman and energy-dispersive X-ray spectroscopies, the field-emission scanning electron microscopy, and the X-ray diffraction.

12p dianmotminh02 03-05-2024 3 1   Download

The influence of the black seed oil modified epoxy resin (EBSO)/monomer 3,4-epoxycyclohexylmethyl 3,4- epoxycyclohexane carboxylate (BCDE) weight ratio in the coatings based on the compounds and photoinitiator triarylsulfonium hexafluoroantimonate (TAS) on thermal properties of photocrosslinked coatings have been studied. The chemical structure of investigated UV-cured coatings was characterized by IR spectrometric analysis. Their thermogravimetric (TG) and differential scanning calorimetry (DSC) behavior were determined by TG and DSC analysis, respectively.

9p dianmotminh02 03-05-2024 4 1   Download

This study revealed that the major contributing descriptors of 2D QSAR studies are DeltaEpsilonB and DeltaPsiA and 3D QSAR model proves the steric as well as electrostatic effects determine the binding affinity for the drug development. The results of the current computational studies are useful for further designing novel chemical entities of anti-microbial agent.

19p dianmotminh02 03-05-2024 7 2   Download

The present study investigated the phytochemical and biological properties of the rhizomes C. aromatica. From the CHCl3 extract of C. aromatic rhizomes, six known compounds, including (-)-hannokinol, (3R,5R)-3,5-diacetoxy-1,7-bis(4- hydroxyphenyl)heptane, naringenin, 2-(4- (hydroxymethyl)phenyl)propan-2-ol, 5-hydroxymethylfurfural, and bisacurone, were isolated. All compounds were tested on the biological inhibitory activities against tyrosinase, αglucosidase, and urease. It was the first time all compounds were isolated from rhizomes of C. aromatica Salisb.

6p dianmotminh02 03-05-2024 4 3   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 7 2   Download

To screen the biodiesel property by the novel Ultrasonic method. To find out the corrosion inhibition rate of neat oil by Mass loss method. SEM analysis were carried out to evaluate the efficacy of neat oil as a green inhibitor.

226p spiritedaway36 26-11-2021 21 4   Download

The purpose of this thesis is to study and synthesize BiMO materials (M = V,Ti,Sn) by microwaveassisted chemical method, hydrothermal method, sol-gel method and evaluate their physical properties. The synthesized materials (Bi2Sn2O7 and Bi2Ti2O7) were investigated the photocatalytic activity in the decomposition of RhotaminB (RhB) under visible light.

28p thebadguys 08-06-2021 23 3   Download

In this thesis, we research and fabricate AgNDs, AgNFs, AuNFs structures on silicon by chemical deposition and electrochemical deposition method for the main purpose of using as SERS substrate. To this target, we have studied the morphology, structure and some properties of the nanostructures produced.

26p extraenglish 24-05-2021 26 4   Download

Research objectives of the thesis: The thesis was conducted to research and develop a new type of electrode: glass charcoal electrodes modified by flower platinum nano (PtNFs/GC) and to evaluate the properties of fabricated electrodes: electrode structure, morphology, physical and chemical properties.

28p extraenglish 24-05-2021 31 4   Download

Research aims and objectives: Determining the effect of the single additive being organic and inorganic substances such as poly alcohol, poly amines, sodium salt of various modules and the combination of additives on the properties of the zinc coating created in the solution. alkaline plating solution without cyanide, compare the chemical and physical properties of the coating obtained from the non cyanide alkaline plating bath and other plating baths.

26p extraenglish 24-05-2021 17 4   Download

Oil was extracted from moringa (PKM-1) seed kernel by using supercritical fluid (SCCO2) extraction process. Supercritical fluid pressures of 100, 150 and 200 bar and temperatures of 40, 50 and 60 °C were considered for SC-CO2 extraction process. Maximum extraction yield of 37.76 g/100g and extraction efficiency of 98.43% were obtained at supercritical fluid pressure of 200 bar and temperature of 40 °C.

12p trinhthamhodang11 27-04-2021 18 1   Download

Present study aims to investigate the seasonal variations of physico-chemical properties and associated weed flora at Dalpatsagar reservoir.

9p chauchaungayxua11 23-03-2021 8 2   Download

Determining the effect ofthe single additive being organic and inorganic substances such as poly alcohol, poly amines, sodium salt of various modules and the combination of additives on the properties of the zinc coating created in the solution. alkaline plating solution without cyanide, compare the chemical and physical properties of the coating obtained from the non cyanide alkaline plating bath and other plating baths.

26p capheviahe29 17-03-2021 15 5   Download