Indicative properties measurements by SEM, SEM-EDX and XRD for initial homogeneity tests of new certified reference materials

Idris, Abubakr M.; El‐Zahhar, Adel A.

doi:10.1016/j.microc.2019.01.032

Cited by 33 publications

(10 citation statements)

References 20 publications

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“…However, if used in excess that is 6% and more, Tran et al [119] emphasized that lime treatment may undergo significant reduction in compressive and shear strength (of up to 30%, or even more) because of requirement of large amount of water and higher initial porosity. As a result, the unconsumed hydrated lime becomes unreactive in the strength gain process [120]. Cement provides the highest strength among other CSMs, whereas lime containing excess of free lime is suitable for materials with PI > 10% as the free lime reacts with clay particles to reduce the plasticity.…”

Section: Discussionmentioning

confidence: 99%

“…According to Idris and El-Zahhar [120], the microstructural properties (surface features, size, and shape) of the sampled particles of lime stabilized soil are highly dependent on the curing period. Scanning electron microscopy (SEM) determines the effect of stabilizer treatment on morphological structure with magnifications at micrometer scale.…”

Section: Main Effect Of Lime Stabilizationmentioning

confidence: 99%

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On the Recent Trends in Expansive Soil Stabilization Using Calcium‐Based Stabilizer Materials (CSMs): A Comprehensive Review

Jalal

Jamhiri

et al. 2020

Advances in Materials Science and Engineering

109

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Calcium-based stabilizer materials (CSMs) exhibit pozzolanic properties which improve the properties of clayey soils by hydration, cation exchange, flocculation, pozzolanic reaction, and carbonation. In this comprehensive review, comprising over past three decades from 1990 to 2019, a mechanistic literature of expansive soil stabilization by incorporating CSMs is presented by reviewing 183 published research articles. The advantages and disadvantages of CSMs as the ground stabilizing agent are succinctly presented, and the major outcomes of physicochemical effects on soil properties are discussed in detail. After blending with CSM, the main and interaction effects on soil properties with focus on chemical processes such as X-ray fluorescence, X-ray diffraction analyses, and microstructure interaction by using scanning electron microscopy and thermogravimetric analysis have been reviewed in light of findings of past researchers. This work will help geotechnical engineers to opt for suitable CSM in the field of geoenvironmental engineering in committing to sustainable construction of civil engineering structures over expansive soils.

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Section: Discussionmentioning

confidence: 99%

Section: Main Effect Of Lime Stabilizationmentioning

confidence: 99%

On the Recent Trends in Expansive Soil Stabilization Using Calcium‐Based Stabilizer Materials (CSMs): A Comprehensive Review

Jalal

Jamhiri

et al. 2020

Advances in Materials Science and Engineering

109

View full text Add to dashboard Cite

show abstract

“…However, the surface morphology showed no significant change when the blending ratio increased from 3:1 to 4:1, which indicated that the effect of urea dosage on the surface morphology was very limited and did not play a decisive role. The SEM images of C-13 and NC-133 also showed that urea can help to complicate the surface morphology to some extent . At the same time, the surface morphology of newly prepared OSC was relatively simple and mostly flaky before the acid pickling operation.…”

Section: Resultsmentioning

confidence: 97%

“…The SEM images of C-13 and NC-133 also showed that urea can help to complicate the surface morphology to some extent. 38 At the same time, the surface morphology of newly prepared OSC was relatively simple and mostly flaky before the acid pickling operation. The flake structure of oil sludge pyrolysis char after pickling (POSC) basically disappeared and the surface morphology tended to be complex, forming a preliminary pore structure.…”

Section: Resultsmentioning

confidence: 99%

Study on Preparation of an Oil Sludge-Based Carbon Material and Its Adsorption of CO₂: Effect of the Blending Ratio of Oil Sludge Pyrolysis Char to KOH and Urea

et al. 2019

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How to prepare a low-cost carbon material with a high carbon dioxide (CO 2 ) adsorption performance has attracted much attention worldwide. Oil sludge, a hazardous solid waste, needs to be disposed off properly. Oil sludge pyrolysis has been proven to be an effective method for waste treatment with the production of pyrolysis oil, gas, and char. In this study, nitrogen-doped carbon (NC) was prepared and characterized based on oil sludge pyrolysis char (OSC). Specifically, NCs were generated by mixing OSC with potassium hydroxide and urea under different blending ratios of 1:3:2, 1:3:3, and 1:3:4 at 700 °C. NCs showed good surface morphology and pore structures with large specific surface areas (1056.45−1138.15 m 2 •g −1 ), pore volumes (1.54−1.63 cm 3 •g −1 ), and a wide range of pore size distribution. The best CO 2 adsorption capacity of NCs at room temperature and pressure is 3.3 mmol•g −1 under a blending ratio of 1:3:2. In addition, the CO 2 /N 2 selectivity of NCs is as high as 8.434. The adsorbent synthesized from oil sludge by a simple and low-cost method is a promising material for carbon dioxide adsorption.

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“…SEM is an important technique to use to observe the microscopic morphology of materials because of its great advantages in resolution, depth of field, and microstructure analysis [30]. The SEM images of Fe 3 O 4 MNPs, MNPs-NH 2 , and immobilized LDH are shown in Fig.…”

Section: Characterizationmentioning

confidence: 99%

Lactate Dehydrogenase-Inhibitors Isolated from Ethyl Acetate Extract of Selaginella doederleinii by Using a Rapid Screening Method with Enzyme-Immobilized Magnetic Nanoparticles

Zhang¹,

Li²,

Liu³

et al. 2022

Front. Biosci. (Landmark Ed)

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Background: Lactate dehydrogenase (LDH) is one of the important enzyme systems for glycolysis and gluconeogenesis. It can catalyze the reduction and oxidation reaction between propionic acid and L-lactic acid, which is usually overexpressed in cancer cells. Therefore, inhibiting the activity of LDH is a promising way for the treatment of cancer. In this study, an effective method based on ligand fishing and ultra performance liquid chromatography-mass spectrum (UPLC-MS) was established to screen and identify active ingredients from Selaginella doederleinii with potential inhibitory activity for LDH. Methods: Firstly, LDH was immobilized on the magnetic nanoparticles (MNPs), three immobilization parameters including LDH concentration, immobilization time and pH were optimized by single factor and response surface methodology for maximum (max) immobilization yield. Then, a mixed model of galloflavin and chlorogenic acid (inhibitors and non-inhibitors of LDH) was used to verify the specificity of immobilized LDH ligand fishing, and the conditions of ligand fishing were further optimized. Finally, combined with UPLC-MS, immobilized LDH was used to simultaneously screen and identify potential LDH inhibitors from the ethyl acetate extract of Selaginella doederleinii. Results: The prepared fishing material was comprehensively characterized by scanning electron microscopy (SEM), transmission electron microscope (TEM), X-ray diffraction (XRD) and fourier transform infrared spectrometer (FT-IR). The optimal immobilization conditions were obtained as LDH concentration of 0.7 mg/mL, pH value of 4.5, and immobilization time of 3.5 h. Under these conditions, the max immobilization yield was (3.79 ± 0.08) × 10 3 U/g. The specificity analysis showed that immobilized LDH could recognize and capture ligands, and the optimal ligand fishing conditions included that the incubation time was 30 min, the elution time was 20 min, and the concentration of methanol as eluent was 80%. Finally, two LDH inhibitors, amentoflavone and robustaflavone, were screened by immobilized LDH from the ethyl acetate extract of Selaginella doederleinii. Conclusions: The study provided a meaningful evidence for discovering the bioactive constituents in ethyl acetate extract of Selaginella doederleinii related to cancer treatment, and this ligand fishing method was feasible for screening enzyme inhibitors from similar complex mixtures.

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Indicative properties measurements by SEM, SEM-EDX and XRD for initial homogeneity tests of new certified reference materials

Cited by 33 publications

References 20 publications

On the Recent Trends in Expansive Soil Stabilization Using Calcium‐Based Stabilizer Materials (CSMs): A Comprehensive Review

On the Recent Trends in Expansive Soil Stabilization Using Calcium‐Based Stabilizer Materials (CSMs): A Comprehensive Review

Study on Preparation of an Oil Sludge-Based Carbon Material and Its Adsorption of CO₂: Effect of the Blending Ratio of Oil Sludge Pyrolysis Char to KOH and Urea

Lactate Dehydrogenase-Inhibitors Isolated from Ethyl Acetate Extract of Selaginella doederleinii by Using a Rapid Screening Method with Enzyme-Immobilized Magnetic Nanoparticles

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Indicative properties measurements by SEM, SEM-EDX and XRD for initial homogeneity tests of new certified reference materials

Cited by 33 publications

References 20 publications

On the Recent Trends in Expansive Soil Stabilization Using Calcium‐Based Stabilizer Materials (CSMs): A Comprehensive Review

On the Recent Trends in Expansive Soil Stabilization Using Calcium‐Based Stabilizer Materials (CSMs): A Comprehensive Review

Study on Preparation of an Oil Sludge-Based Carbon Material and Its Adsorption of CO2: Effect of the Blending Ratio of Oil Sludge Pyrolysis Char to KOH and Urea

Lactate Dehydrogenase-Inhibitors Isolated from Ethyl Acetate Extract of Selaginella doederleinii by Using a Rapid Screening Method with Enzyme-Immobilized Magnetic Nanoparticles

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Study on Preparation of an Oil Sludge-Based Carbon Material and Its Adsorption of CO₂: Effect of the Blending Ratio of Oil Sludge Pyrolysis Char to KOH and Urea