Preparation techniques
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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 5 1 Download
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Amorphous alloy ribbons of (Fe50Ni50)73.5Si13.5B9Nb3Cu1 were fabricated by rapid cooling technique on single copper wheel. After fabrication, the crystalline structure of the ribbons were examined by X-ray diffraction method. The results show that the samples possess a complete amorphous state.
6p viberkshire 09-08-2023 12 5 Download
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The main aims of this research are: To determine the phase inversion temperatures for the formation of oil-in-brine nanoemulsions at various salt concentrations using conductivity measurements; To prepare the nano-emulsions at PIT points, and study their stability by measuring their droplet size, polydispersity and size distribution using dynamic light scattering technique; To confirm the DLS results using Cryo-SEM technique;...
324p runthenight07 01-03-2023 5 3 Download
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The focus of this study is to investigate its optical and conductive properties under different conditions of doping environments, temperature and polymerization conditions. Optical characterization technique such as UV-Visible spectroscopy is developed to carry out the investigation. The developed nanofibers have been demonstrated to possess optical and conductive properties to be dependent on doping variables. Study of these optical properties could prove very useful in the development of electrochromic devices and gas sensors.
103p runthenight07 01-03-2023 7 3 Download
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My study is about to help the first year English majored students at Hai Phong Management and Technology University improve their speaking skill through extra- techniques and to prepare for them to the basic knowledge of speaking skill with higher requirement for the levels.
76p trinhthamhodang10 16-03-2021 34 5 Download
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Traditional ceramic technology combined with a two-step sintering technique has been applied to prepare 0.96(K0.48Na0.48Li0.04)(Nb0.95Sb0.05)O3-0.04Bi0.5(Na0.82K0.18)0.5ZrO3 (KNLNS-BNKZ) piezoelectric ceramics. The experimental results show that the ceramic samples have a pure perovskite structure with the coexistence of tetragonal and rhombohedral phases.
10p nguaconbaynhay10 19-02-2021 20 3 Download
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Develop a rapid and simple method for analysis of multi-residue pesticides, including organophosphate, organochlorine, carbamate, and pyrethroid compounds in soil, with sample preparation based on QuEChERS technique and determination by GC-MS.
26p capheviahe26 25-01-2021 28 3 Download
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Borotellurite glasses were prepared by melt quenching technique. Amorphous nature of samples was confirmed through X-ray diffraction (XRD) patterns. Effect of B2O3 content on the structure of glass network was studied through Fourier-transform infrared spectroscopy (FTIR) spectra. Optical band gap and Urbach energy were found from analysis of optical absorption spectra. Thermal studies were carried out by using Differential thermal analyzer (DTA) measurements.
8p tamynhan6 14-09-2020 12 2 Download
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Here, we discuss one of the simplest approaches for chemical functionalization of in-situ prepared polyaniline (Pani) and its nanocomposites with multi-walled carbon nanotubes (MWCNT) and graphene (GN) in chlorosulphonic acid.
11p tamynhan4 06-09-2020 14 1 Download
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The current challenges related to safety, security and economic efficiency lead to the consolidation of the level of education and training of merchant marine officers, through the interdependence and diversification of the curricula in the world economy of shipping, finance of the maritime industry and the specialized labour market.
9p christabelhuynh 04-06-2020 15 1 Download
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In this article, magnetically nanoparticles (MNPs) of CuFe2O4 were prepared and characterized using Fourier transform infrared spectroscopy, scanning electron microscopy, X-ray diffraction and transmission electron microscopy techniques.
10p tocectocec 25-05-2020 15 0 Download
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In the first lesson of inorganic chemistry lab, preparing and testing solutions are two basic tasks needed to perform well. Dissolving a solid solute in the solvent or diluting the stock solution (a dilution series by using two techniques that are making parallel dilutions and serial dilutions) is to prepare solution with desired concentration of solute or desired volume.
11p suplo28475858 24-05-2020 34 3 Download
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In the present study, GNPs/Ti-Fe binary oxide composites were synthesized from ilmenite of Central Viet Nam using hydrothermal method. The effect of amount of Fe on the morphology, structure and photocatalytic performance of prepared materials were characterized by scanning electron microscopy, transmission electron microscopy, X-ray diffraction, UV–VIS Diffuse Reflectance spectrophotometer, Energy-dispersive X-ray spectroscopy and BET techniques.
10p abcxyz123_02 03-03-2020 18 3 Download
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The enhancements of zero superconducting transition temperature (Tc,0) in Bi1.6Pb0.4Sr2Ca2- xNaxCu3O10+δ (BPSCCO) are reported. The BPSCCO samples (with x ranging from 0.00 to 0.06) were prepared by using the conventional solid state reaction technique. The properties of the samples were examined by using the X-ray diffraction (XRD), scanning electron microscopy (SEM), and the resistance versus temperature (R-T) measurements.
9p abcxyz123_02 03-03-2020 13 3 Download
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The study is finding out appropriate techniques for students at Hai Phong Private University to improve their speaking skill and to prepare for them to the basic knowledge of speaking skill with higher requiremeEnglish majors at HPUnt for the next graders. The expectation is that the first year can consider speaking English as their favorite activity.
48p queencongchua3 26-09-2019 26 5 Download
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The research objective of the dissertation completes the technological process of modulating super oxidation solution, thereby manufacturing equipment to suit Vietnamese conditions and applying this solution to disinfect hospital wastewater.
25p xacxuoc4321 11-07-2019 26 4 Download
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In this paper, a method to prepare video data is proposed consisting of a shot boundary detection technique on the basis of tracking camera motion through the background areas to the video frame (background tracking) and of some other steps to discard noise and to reduce false segmentation for increasing the accuracy of the video stream segmentation. Measures to be taken to overcome the problem of object’s and camera’s motion are proposed and an enhanced algorithm for segmenting video data is also reported.
12p binhminhmuatrenngondoithonggio 09-06-2017 42 4 Download
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Reference document content FIA MA1 "Management information - Study Text 2015" to capture the details of: The nature and purpose of management accounting, cost accounting techniques, standard costing,...
289p lovestormy94 13-12-2015 92 13 Download
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Epoxy-cardanol nanocomposites were prepared by insitu polymerization techniques. Their structures and properties were investigated by X-ray Diffraction (XRD) and Scanning Electron Microscopy (SEM). The results showed that the chains of epoxy-cardanol resin could be intercalated into the galleries of nanoclay I.30E to form exfoliated structure. The influence of nanoclay I.30E on the thermal of epoxy-cardanol resin was determined by TGA method, which showed an increase with increasing amounts of nanoclay I.30E.
5p uocvong04 24-09-2015 72 5 Download
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The following silver and copper complexes in which quinine is coordinated via the two possible donor atoms was prepared and characterized. Coordination of quinine via the hydroxyl oxygen and quinoline nitrogen is observed in C20H25N2O2Cu2(SO4)2.6H2O and C20H25N2O2Ag2(SO4). The existence of the proton at the coordinated hydroxyl oxygen is also observed in these complexes. The coordination mode and the conformation of quinine can be derived from IR and Raman spectra and by using NMR techniques.
5p uocvong04 24-09-2015 37 3 Download