SEM observation

This study aims to recycle the coal bottom ash (CBA) for making environmentally friendly construction bricks. In the brick proportion, CBA was employed as fine aggregate to replace 0, 30, 50, 70, 85, and 100% of stone powder.

5p viplato 02-01-2024 4 3   Download

Scanning electron microscope (SEM) is a popular tool used for observing bacteria surface and morphology. Using Pseudomonas aeruginosa as a model, this work aimed to show a SEM preparative procedure that is simple and economical but does not result in considerable data loss.

10p vimulcahy 18-09-2023 4 2   Download

This paper studies the impact of drone delivery services on customers’ intention in Vietnam. The research uses correlation analysis and structural equation modeling (SEM) to analyze the data of 405 valid observations collected in a structured questionnaire survey in Vietnam.

10p viwolverine 11-07-2023 6 4   Download

Scanning electron microscopy (SEM) is a powerful tool for visualising reservoir pore and grain framework systems which (SEM) provides qualitative information about pore geometry through direct observation of a rock or a pore cast of the rock. This aids in understanding reservoir productivity capabilities.

9p viwolverine 07-07-2023 7 3   Download

Tubular zeolite BEA membrane was prepared by a hydrothermal secondary growth method in the absence of an organic structure directing agent (OSDA). Membrane formation process was carefully observed by using FE-SEM, XRD, and N2 adsorption, and the role of seed crystals on the support surface was discussed.

6p vironald 15-12-2022 9 3   Download

This study delves into the impact of employer branding on employee performance, a factor of the current employee. The research method used is mixed methods with Partial Least Squares Structural Equation Modeling (PLS-SEM). The sampling method is carried out according to the conventional method. 937- observation sample was surveyed through questionnaires directly from employees working for 37 companies and organizations in Vietnam.

18p vispyker 14-11-2022 9 2   Download

The visual observation and water permeability tests showed that bacterial mortar could repair the cracks and prevent the invasion of liquids and gases compared with the negative control. Besides, SEM and XRD analytical results indicated that the different carbonate polymorphs were formed inside the cracks. Additionally, the plate count method revealed that there were vegetative S. pasteurii cells in cracks even after 28 days, which means the bacterial mortar may have a long-lasting effect on the cement.

11p linyanjun_2408 23-04-2022 13 1   Download

SEM and micro-FTIR analysis carried out onto surgical masks collected from Italian beaches highlighted the same morphological and chemical degradation signature observed in the masks subjected to the artificially weathering experiments, confirming the risks of a similar microfiber release into the marine environment.

6p thebadguys 15-01-2022 11 0   Download

Sitophilus zeamais Motschulsky, 1855 (Coleoptera: Curculionidae) which develops inside the grain, is an aggressive pest of stored grains. Here, we evaluated the efficiency of diatomaceous earth (DE), Diatomita CI/325 CX, and dolomite (DOL), Dolomita Dr. Kanyo, against S. zeamais reared on corn under laboratory conditions and observed external alterations on treated insects using scanning electron microscopy (SEM). Insects treated with both DE and DOL were impregnated with particles on the body surface, and they showed 100% mortality after 10 days of exposure.

8p dolomite36 30-12-2021 10 0   Download

CeO2–ZrO2-composed NiO and Co3O4 catalysts were prepared by 3 different methods. Both CO methanation and selective CO methanation were carried out. All catalysts were prepared by (1) co-precipitation, (2) surfactantassisted co-precipitation, and (3) surfactant-assisted co-precipitation with ultrasound mixing methods. Catalysts were characterized by using N2 physisorption, XRD, SEM, TEM, and TPR-H2 techniques. The highest surface area value, uniform pore size distribution, and pores having small diameters were observed for the catalysts prepared by using the surfactant and ultrasound.

13p langthannam 29-12-2021 10 0   Download

In this research, the dehydration behavior of kurnakovite was studied under microwave irradiation. The kinetic parameters of the dehydration reaction were determined using different kinetic models. Kurnakovite was characterized by the techniques of X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), and scanning electron microscopy (SEM) before and after the dehydration process.

11p langthannam 29-12-2021 9 0   Download

This article reports on the synthesis procedure of ZnO nanoparticles/nanofibers structure by electrospinning method using Zinc acetate and polyvinylpyrrolidone (PVP) surfactant as reagents and evaluates their luminescent properties. The microstructure of ZnO nanoparticles/nanofibers was observed by FE-SEM.

5p meyerowitz 25-12-2021 7 0   Download

Micromorphological characteristics of 13 Trifolium species, which are grown in the province of Bolu, were examined using a scanning electron microscope (SEM). The morphological characteristics determined from the study were subjected to morphometric analyses and their variation spectrums were defined. Tricolporate pollen grains showed two pollen shapes, prolate and subprolate, according to equatorial view. The smallest size of polar axis length (18.00 μm) was found in T. micranthum Viv. from section Chronosemium Ser.; the largest (88.95 μm) was found in T. hirtum All.

14p tudichquannguyet 29-11-2021 6 1   Download

Achene micromorphological evidence belonging to 32 species of Potentilla from Iran were studied using scanning electron microscopy (SEM). Multivariate analysis was used to estimate the potential contribution of the quantitative and qualitative traits to the species relationships. Based on the present results, the achene micromorphological traits exhibited considerable variations.

29p tudichquannguyet 29-11-2021 11 1   Download

In this study, 3,4-dihydroxy-L-phenylalanine (L-Dopa) was solvothermally polymerized to monodisperse microspheres 1 µm in diameter. Polymerization was carried out in dimethylformamide containing appropriate amounts of urea and L-Dopa at 120 ◦ C for 24 h. Synthesis of the polymer in basic aqueous solution under hydrothermal conditions or via conventional heating resulted in the formation of bulky powders including irregularly shaped particles of the polymer. The morphologies of the synthesized polymers were characterized by scanning electron microscopy (SEM).

14p tudichquannguyet 29-11-2021 5 0   Download

In this study, thin films of Co, Ni, Pd, and Pt were prepared on Co3O4 support material in pellet form using the direct current (DC) magnetron sputtering method for use as catalysts for hydrogen generation from NaBH4. Characterization of the catalysts was carried out using X-ray diffraction (XRD), scanning electronic microscopy (SEM), and X-ray photoelectron spectroscopy (XPS). According to cross-sectional SEM images, catalyst thicknesses were observed in the range of approximately 115.3–495.8 nm. The particle sizes were approximately 25.0, 21.4, 33.9, and 9.

12p tudichquannguyet 29-11-2021 8 1   Download

Recognizing this importance, the study collected 256 observations of small and medium-sized enterprises and tested through the SEM model the relationship of leadership capacity to corporate performance. Viewpoint of balanced scorecards at small and medium enterprises in Danang City.

10p viwendy2711 05-10-2021 14 4   Download

Deposition of copper by electrorefining process was attained to observe the effect of the additive agents on process performance (cathode purity, surface morphology, deposition rate, current efficiency and power consumption). The deposition was done in acidic media with 40 g/l and 160 g/l concentration of cupric ions and sulfuric acid, respectively. The operating parameters were utilized: electrolyte residence time 6, 4 and 2 h, electrodes spacing 15, 30 and 45 mm, with and without addition of additive agents 3, 2.

15p nguaconbaynhay6 24-06-2020 10 0   Download

In this work a technique of metallizing substrate via electroless plating using moisture-cured polyurethane (MCPU) system as the undercoat is presented. MCPU prepolymer was prepared by mixing polyethylene glycol divinyl ether and diphenylmethane-4, 4’-diisocyanate in 1:1 ratio. The effects of etching time as well as curing period on the surface characteristic of MCPU undercoating were investigated. Contact angle measurements, FTIR and SEM were employed to study the changes on the surface of the treated MCPU undercoats prior to electroless nickel plating.

13p 12120609 01-06-2020 5 0   Download

There are different opinions about the relationship of two disjunctively distributed varieties Adiantum reniforme L. var. sinense Y.X.Lin and Adiantum reniforme L. Adiantum reniforme var. sinense is an endangered fern only distributed in a narrowed region of Chongqing city in China, while Adiantum reniforme var. reniforme just distributed in Canary Islands and Madeira off the north-western African coast.

10p viminato2711 22-05-2020 10 1   Download