Startseite Reinforcement of cementitious mortars with hemp fibers and shives
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Reinforcement of cementitious mortars with hemp fibers and shives

  • Aylin Özodabaş EMAIL logo
Veröffentlicht/Copyright: 23. Juni 2023

Abstract

Polypropylene, steel, and carbon fibers are used to increase the ductility and toughness of concrete materials. In recent years, studies on the use of natural fibers have increasingly continued. Among natural fibers, hemp fiber has the highest tensile strength value. The aim of this study was to discuss and present the results of the experimental study on the use of cement-based hemp shives and fibers to increase the ductility of mortars. Another aim is to increase the use of hemp in the construction field by using more economical and natural fibers. Various binders and different amounts of fibers and shives were added and their effects on flexural strength were investigated. Water absorption and flexural tests and scanning electron microscope and X-ray diffraction analysis were performed on the produced samples. Particle and hole size distributions and stereo microscope images of the samples are given. The use of hemp fibers was observed to improve flexural strength, while shives were not significantly improved flexural strength.

1 Introduction

Hemp concrete can be recycled at the end of the building’s lifespan. In addition, hemp can be harvested in as little as 60 days. Hemp concrete is a better-than-zero-carbon material because it absorbs carbon from the atmosphere while the hemp plant is grown. It is one of the few materials that has the ability to absorb carbon even after it has been used in construction. In addition, the cannabis plant removes heavy metals from water and soil [1]. Hemp and lime is a material that consumes CO2 through carbonation inside the concrete matrix [2]. In a study, they found the total carbon sequestration amount of hemp concrete as 307.26 kg CO2 per m3 (Figure 1) [2,3]. Hemp concrete is considered a green building material not only because of its low carbon content but also because of its ability to regulate heat, humidity, and relative humidity [4]. Hemp concrete is also known to exhibit acoustic insulation [5]. Response to fire is an important factor to consider as it relates to building safety. However, interestingly, all of the research has agreed that hemp concrete is suitable for fire resistance [6].

Figure 1 
               Net emission balance showing carbon negativity and carbon emission of hemp concrete [2,3].
Figure 1

Net emission balance showing carbon negativity and carbon emission of hemp concrete [2,3].

Hempcrete, also known as lime-hemp concrete, is a breakthrough concept that has attracted attention [7]. Lime is a binder that is 500°C lower than the temperature used to make cement (1,450°C) and is produced in a limestone kiln at 950°C. In addition, during the carbonation process that occurs during its hardening, most of the CO2 released as a result of the chemical reaction that creates it is absorbed back into the system. Therefore, the carbon emission is significantly smaller or even negative than that of cement [8].

Hemp shives are a byproduct of the hemp fiber industry. They constitute 65–70% of the total production (by mass) of the hemp plant. The usage areas of the hemp plant are given in Figure 2. In a study that has been done, the 2-year evolution of the functional properties of two hemp concretes formulated with two different binders according to different environmental conditions was investigated. These binders are a natural cement (NC) and a lime-based binder (FL). Thermal conductivity increases during aging and this increase is greater for FL than for NC [9]. In this case, although lime is a sustainable building material, it could not provide durability such as cement mixtures in aging tests.

Figure 2 
               Uses of the hemp plant.
Figure 2

Uses of the hemp plant.

In the last few decades, several studies have been conducted on the use of natural fibers in cementitious concrete to improve properties [10]. Figure 3 shows the optimum replacement percentage of various natural fibers in cement concrete [11].

Figure 3 
               Optimum replacement percentage of various natural fibers in cement concrete [10].
Figure 3

Optimum replacement percentage of various natural fibers in cement concrete [10].

Different binders have been reported to produce hemp concrete, such as ordinary Portland cement, lime, and lime combination [12,13,14]. It is confirmed by a large number of studies and has mechanical properties that make natural fibers suitable for use in building materials [15,16,17,18]. It is also important to state that building materials made with natural fibers have lower production costs than those made with synthetic fibers [19]. Hemp concrete is a viable solution to increase the energy efficiency of buildings [20].

As it is known, hemp fibers are one of the highest tensile strengths among natural fibers [10,21]. It has been shown that long sisal fibers are more effective than short sisal fibers in increasing the bending capacity of the sandwich panel [22]. Table 1 includes the mechanical properties of natural and synthetic fibers. It is seen that the tensile strength values of hemp are greater than other natural fibers but less than carbon and glass fibers. It can be used to increase toughness and ductility instead of using it as reinforcement in concrete. In addition, due to its good insulation properties, its usage areas can be increased as an insulation material. In this study, hemp was used as shive and fiber to increase the toughness and ductility of concrete. The effects of these two forms on concrete were investigated by mechanical experiments, X-ray diffraction (XRD) experiments, stereo microscope, scanning electron microscope (SEM) analysis, and gap and particle size distribution.

Table 1

Mechanical properties of natural fibers compared to conventional reinforcement obtained from the literature [23,24,25]

Fiber Density (g/cm3) Elongation at break (%) Tensile strength (MPa) Young’s modulus (GPa)
Hemp 1.14–1.51 1.6 500–900 30–80
Flax 1.20–1.50 2.7–3.2 345–1,035 28–90
Sisal 1.45–1.50 2.0–2.5 67–635 4–22
E-Glass 2.50–2.60 2.5 2,000–3,500 70–80
Carbon 1.40–1.78 1.4–1.8 4,000–5,000 230–240
Steel 7.75–8.05 0.5–3.5 500–2,000 200–210

2 Materials and methods

2.1 Materials

Hemp shives and some fibers were soaked in water for 24 h before use due to their hydrophilic properties. The other shives were used in dry form to compare. Wet preservation of hemp is equivalent to other pre-treatment of hemp fibers [19]. The particle size distribution for a sample of hemp shives is listed in Table 2. The chemical compositions and physical properties of hemp fibers and shives are given in Table 3. Figure 4 shows the chemical forms found in hemp. Four different sizes of shives and fibers used in the samples are given in Figure 5. In Figure 6, samples containing shives and fibers are given.

Table 2

Particle size distribution [5]

Particle length (mm) Mass (g) Quantity (%) By mass (%)
Small ≤ 4 mm 0.8 50 17.02
Medium ≤ 8 mm 1.2 28 25.53
Large ≥ 9 mm 2.7 22 57.45
Table 3

Chemical compositions and physical properties of hemp [10,27,28]

Hemp
Chemical compound Fibers (%) Shives (%)
Cellulose 81 77
Hemicellulose 20 44
Lignin 4 21
Pectin 0.9 1
Fat and wax 0.8 1
Physical Properties
Diameter (μm) 8–600 8–600
Water absorption (%) 272 276
Figure 4 
                  Hemp stem image and hemp fiber architecture [26].
Figure 4

Hemp stem image and hemp fiber architecture [26].

Figure 5 
                  Shives of different sizes (numbered a: 1, b: 2, c: 3 and d: 4) and fibers (e) used in the experiments.)
Figure 5

Shives of different sizes (numbered a: 1, b: 2, c: 3 and d: 4) and fibers (e) used in the experiments.)

Figure 6 
                  Samples with (a and b) shive and (c) fiber contents.
Figure 6

Samples with (a and b) shive and (c) fiber contents.

2.2 Preparation of mortars

In this study, 32 series of concrete mixes were produced, in which the amount of materials used changed at certain rates. Due to the hydrophilic properties of cannabis, it was washed by soaking in water for 24 h before use. Two different types of hemp, shive and fiber, were used. In shive-containing samples; the effects of hydrated lime and brick dust in the K samples and gypsum in the I samples on the flexural strength and water absorption values were investigated. While some of the shives were used wet and some dry, all of the fibers were used wet. While hemp fibers were placed in longitudinal form in one group of samples, they were placed in mixed form in the other group of samples. Figure 7 illustrates the classification of the materials used in the design of the mortar.

Figure 7 
                  Classifications made in the production of the test samples.
Figure 7

Classifications made in the production of the test samples.

Each experiment was performed three times. After 24 h, the poured samples were removed from their molds and cured under laboratory conditions for 28 days. The ratio of shives was fixed for comparison. The materials used in the samples with the shive content giving optimum values were then used in the fiber mixtures. The mixtures were prepared per the mixing procedure in the TS EN 196-1 standard. The content ratios of the materials used in the mortar mixture are given in Tables 4 and 5.

Table 4

Mixture proportions with shive content

Samples Shive condition Water (%) Gypsum (%) Hydrated lime (%) Shive (%) Brick dust (%) Cement (%) Cement adhesive (%)
K1 Dry (No 1) 46 0 5 7 5 37 0
K2 Dry (No 1) 0 37
K3 Dry (No 2) 37 0
K4 Dry (No 2) 0 37
K5 Dry (No 3) 37 0
K6 Dry (No 3) 0 37
K7 Dry (No 4) 0 42 0
K8 Dry (No 4) 0 42
I1 Wet (No 1) 46 5 0 7 0 42 0
I2 Wet (No 1) 0 42
I3 Wet (No 2) 42 0
I4 Wet (No 2) 0 42
I5 Wet (No 3) 42 0
I6 Wet (No 3) 0 42
I7 Wet (No 4) 42 0
I8 Wet (No 4) 0 42
Table 5

Mixture proportions with fiber content

Samples Fiber condition Water (%) Gypsum (%) Fiber (%) Cement (%) Cement adhesive (%)
D1 Longitudinal fiber 33 7 2 58 0
D2 Longitudinal fiber 1.5 58.5 0
D3 Longitudinal fiber 1.0 59 0
D4 Longitudinal fiber 0.5 59.5 0
D5 Longitudinal fiber 2 0 58
D6 Longitudinal fiber 1.5 0 58.5
D7 Longitudinal fiber 1.0 0 59
D8 Longitudinal fiber 0.5 0 59.5
KL1 Mixed fiber 33 7 2 58 0
KL2 Mixed fiber 1.5 58.5 0
KL3 Mixed fiber 1.0 59 0
KL4 Mixed fiber 0.5 59.5 0
KL5 Mixed fiber 2 0 58
KL6 Mixed fiber 1.5 0 58.5
KL7 Mixed fiber 1.0 0 59
KL8 Mixed fiber 0.5 0 59.5

2.3 Experimental methods

To assess water absorption, the samples were immersed in a water bath at laboratory conditions (20°C) for 48 h. The percentage of water content was determined using the following equation:

(1) W c ( % ) = ( W WC W dc ) × 100 / W dc ,

where W wc is the weight of the water-saturated sample and W dc is the weight of the dry sample.

Three-point flexural tests were performed on three mortar prism samples with dimensions of 40 mm × 40 mm × 160 mm according to TS EN 196-1.

2.4 Characterization

SEM analysis was performed to examine the physicochemical and structural changes of the mortar samples and their surface properties were determined. A ZEISS Supra 40VP model was used for SEM imaging and energy-dispersive spectrometer (EDX) analysis. We conducted an X-ray diffraction (XRD) analysis using a Panalytical Empyrean X-ray diffractometer. In addition, the LEICA S6 D model was used for stereo microscope images.

3 Results and discussion

3.1 Water absorption

It was not expected that water absorption values of lime were higher than gypsum [29,30]. However, in the samples used in the shives, the gypsum-containing ones absorbed less water than those containing lime (Figure 8). Since the water absorption rate is higher in limes, only gypsum was used in the fibers. It was observed that the water absorption rate of the samples increased as the size of the shive used increased. Soaked shives exhibited better water absorption performance than dry shives. The best water absorption values; among the samples containing wetted shive, the I3 sample has a water absorption value of 7.14%. Among the fibrous samples, the D3 sample has the lowest fiber content and its water absorption value is 8.11%. The highest water absorption values; samples containing unwetted shive and samples with the highest fiber content.

Figure 8 
                  Water absorption rates of samples containing shive and fiber.
Figure 8

Water absorption rates of samples containing shive and fiber.

It is observed that the water absorption values of the samples using cement adhesive are higher than that of cement. The water absorption values of the samples placed by mixing the fibers with mortar into the mold gave better results than the fibers placed straightly.

3.2 Flexural strength

As shown in Figure 9, the flexural strength values of the fibrous samples are higher than the samples with the shive content. The flexural strength values of the samples placed by mixing the fibers with mortar into the mold gave better results than the fibers placed straightly. The highest flexural strength value among the shives was the I5 sample, which was 1.03 MPa. Among the fibers, the KL1 sample contains mixed fiber and cement and is 9.28 MPa. As the fiber ratios increased, the flexural strength values increased [31]. Cementitious ingredients gave better results than cement adhesive ingredients. In a study, cementitious composites containing hemp showed the best performance [32].

Figure 9 
                  Flexural strength rates of samples containing shive and fiber.
Figure 9

Flexural strength rates of samples containing shive and fiber.

3.3 SEM analysis

SEM images of fracture surfaces of cured cement paste are shown in Figure 10. Block-shaped portlandite (calcium hydroxide) crystals exhibiting a typical cubic behavior are seen in sample D1. The tubular structure of the hemp was seen in sample I1 [33]. The images in the I3 sample show that the bonding of the cellulose microfibers with the mortar is good due to the surface textures and non-deformable hemp fibers.

Figure 10 
                  SEM images of samples containing fiber (D1) and shive (I1 and I3).
Figure 10

SEM images of samples containing fiber (D1) and shive (I1 and I3).

Figure 11 shows the results of EDX analyses confirmed by XRD analysis. The predominance of calcium, silicon, aluminum, and oxygen was determined. Figure 12 shows the holes in the shives samples. Large pore sizes have developed due to the presence of fibers. Despite these flaws, it increased the bending strength [34]. Figure 13 shows the hole size distribution of the K7 sample and the hole size distribution found in the cells of the hemp shive in the I1 sample. It is seen in both the SEM image and size distribution analysis that the gap size distributions of hemp cells are very different from each other.

Figure 11 
                  EDX analyses of samples containing shive (K7) and fiber (D1).
Figure 11

EDX analyses of samples containing shive (K7) and fiber (D1).

Figure 12 
                  Holes in the shives of I1 and I3 samples.
Figure 12

Holes in the shives of I1 and I3 samples.

Figure 13 
                  SEM analysis of hole size average of K7 sample and hemp shive cross-section in the I1 sample.
Figure 13

SEM analysis of hole size average of K7 sample and hemp shive cross-section in the I1 sample.

3.4 Stereo microscope analysis

In Figure 14, the fibers used in the stereo microscope images are seen in the D1 and K1 samples and the shives in the I1 and I3 samples. Analysis of the fragment distribution of holes and shives is given in Figure 15. It is seen that the hole size distribution of the K7 sample obtained from SEM analysis in Figure 13 and the hole size distribution of the I3 sample obtained from the stereo microscope in Figure 15 are close to each other. In this case, it is seen that the stereo microscope and SEM images support each other. The presence of cavities significantly affects the mechanical behavior of concrete. As the cavity diameter increased from 0 to 20 mm, the compressive strength values of the samples containing the inner cavity decreased non-linearly [35].

Figure 14 
                  Stereo microscope images of D1, I1, I3, and K2 samples.
Figure 14

Stereo microscope images of D1, I1, I3, and K2 samples.

Figure 15 
                  The distribution of the sizes of the holes and shives pieces of the I3 sample.
Figure 15

The distribution of the sizes of the holes and shives pieces of the I3 sample.

3.5 XRD crystallography analysis

Analysis of the XRD data in Figures 16 and 17 shows that the crystal content of the wet shives (I1 and I3), dry shives (K2, K3, and K7), and fiber-containing (D1) mortar samples includes hematite (Fe2O3), cristobalite (SiO2), portlandite (Ca(OH)2)·(3Al2O3·2SiO2), quartz (SiO2), and portlandite (Ca(OH)2). In the XRD spectrum of the samples, quartz traces with a wide peak were observed in the 20–30° 2θ region [36,37].

Figure 16 
                  XRD analyses of samples (I1, I3, and D1).
Figure 16

XRD analyses of samples (I1, I3, and D1).

Figure 17 
                  XRD analyses of samples (K2, K3, and K7).
Figure 17

XRD analyses of samples (K2, K3, and K7).

4 Conclusıon

As expected, the flexural strength values of the fibrous samples in the produced samples gave nine times better results than the shive samples. The fibers increased the toughness of the samples compared to the shives samples. In fact, as the fibers’ ratios increased, the flexural strengths increased even more. The use of hemp fibers can be a good alternative to steel and synthetic fibers. It was observed that the shives formed voids in the samples, lightening the sample, but decreasing the strength values. The water absorption and porosity of the shives were higher than the fibrous samples. In this case, research can be made for their use in thermal insulation materials to shed light on future studies.

Acknowledgments

The author would like to thank Bilecik Şeyh Edebali University Scientific Research Projects Coordinatorship for their support to the project numbered 2022-01.BŞEÜ.03-08 at Bilecik Şeyh Edebali University Central Campus.

  1. Funding information: There is no funding for this article.

  2. Author contributions: The author confirms sole responsibility for the following: study conception and design, data collection, analysis and interpretation of results, and article preparation.

  3. Conflict of interest: The author declares no conflict of interest.

  4. Ethical approval: The conducted research is not related to either human or animal use.

  5. Data availability statement: Derived data supporting the findings of this study are available from the corresponding author on request.

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Received: 2023-03-13
Revised: 2023-04-18
Accepted: 2023-04-30
Published Online: 2023-06-23

© 2023 the author(s), published by De Gruyter

This work is licensed under the Creative Commons Attribution 4.0 International License.

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  24. Comparative study between supported bimetallic catalysts for nitrate remediation in water
  25. Persicaline, an alkaloid from Salvadora persica, inhibits proliferation and induces apoptosis and cell-cycle arrest in MCF-7 cells
  26. Determination of nicotine content in locally produced smokeless tobacco (Shammah) samples from Jazan region of Saudi Arabia using a convenient HPLC-MS/MS method
  27. Changes in oxidative stress markers in pediatric burn injury over a 1-week period
  28. Integrated geophysical techniques applied for petroleum basins structural characterization in the central part of the Western Desert, Egypt
  29. The impact of chemical modifications on gamma-ray attenuation properties of some WO3-reinforced tellurite glasses
  30. Microwave and Cs+-assisted chemo selective reaction protocol for synthesizing 2-styryl quinoline biorelevant molecules
  31. Structural, physical, and radiation absorption properties of a significant nuclear power plant component: A comparison between REX-734 and 316L SS austenitic stainless steels
  32. Effect of Moringa oleifera on serum YKL-40 level: In vivo rat periodontitis model
  33. Investigating the impact of CO2 emissions on the COVID-19 pandemic by generalized linear mixed model approach with inverse Gaussian and gamma distributions
  34. Influence of WO3 content on gamma rays attenuation characteristics of phosphate glasses at low energy range
  35. Study on CO2 absorption performance of ternary DES formed based on DEA as promoting factor
  36. Performance analyses of detonation engine cogeneration cycles
  37. Sterols from Centaurea pumilio L. with cell proliferative activity: In vitro and in silico studies
  38. Untargeted metabolomics revealing changes in aroma substances in flue-cured tobacco
  39. Effect of pumpkin enriched with calcium lactate on iron status in an animal model of postmenopausal osteoporosis
  40. Energy consumption, mechanical and metallographic properties of cryogenically treated tool steels
  41. Optimization of ultra-high pressure-assisted extraction of total phenols from Eucommia ulmoides leaves by response surface methodology
  42. Harpin enhances antioxidant nutrient accumulation and decreases enzymatic browning in stored soybean sprouts
  43. Physicochemical and biological properties of carvacrol
  44. Radix puerariae in the treatment of diabetic nephropathy: A network pharmacology analysis and experimental validation
  45. Anti-Alzheimer, antioxidants, glucose-6-phosphate dehydrogenase effects of Taverniera glabra mediated ZnO and Fe2O3 nanoparticles in alloxan-induced diabetic rats
  46. Experimental study on photocatalytic CO2 reduction performance of ZnS/CdS-TiO2 nanotube array thin films
  47. Epoxy-reinforced heavy metal oxides for gamma ray shielding purposes
  48. Black mulberry (Morus nigra L.) fruits: As a medicinal plant rich in human health-promoting compounds
  49. Promising antioxidant and antimicrobial effects of essential oils extracted from fruits of Juniperus thurifera: In vitro and in silico investigations
  50. Chloramine-T-induced oxidation of Rizatriptan Benzoate: An integral chemical and spectroscopic study of products, mechanisms and kinetics
  51. Study on antioxidant and antimicrobial potential of chemically profiled essential oils extracted from Juniperus phoenicea (L.) by use of in vitro and in silico approaches
  52. Screening and characterization of fungal taxol-producing endophytic fungi for evaluation of antimicrobial and anticancer activities
  53. Mineral composition, principal polyphenolic components, and evaluation of the anti-inflammatory, analgesic, and antioxidant properties of Cytisus villosus Pourr leaf extracts
  54. In vitro antiproliferative efficacy of Annona muricata seed and fruit extracts on several cancer cell lines
  55. An experimental study for chemical characterization of artificial anterior cruciate ligament with coated chitosan as biomaterial
  56. Prevalence of residual risks of the transfusion-transmitted infections in Riyadh hospitals: A two-year retrospective study
  57. Computational and experimental investigation of antibacterial and antifungal properties of Nicotiana tabacum extracts
  58. Reinforcement of cementitious mortars with hemp fibers and shives
  59. X-ray shielding properties of bismuth-borate glass doped with rare earth ions
  60. Green supported silver nanoparticles over modified reduced graphene oxide: Investigation of its antioxidant and anti-ovarian cancer effects
  61. Orthogonal synthesis of a versatile building block for dual functionalization of targeting vectors
  62. Thymbra spicata leaf extract driven biogenic synthesis of Au/Fe3O4 nanocomposite and its bio-application in the treatment of different types of leukemia
  63. The role of Ag2O incorporation in nuclear radiation shielding behaviors of the Li2O–Pb3O4–SiO2 glass system: A multi-step characterization study
  64. A stimuli-responsive in situ spray hydrogel co-loaded with naringenin and gentamicin for chronic wounds
  65. Assessment of the impact of γ-irradiation on the piperine content and microbial quality of black pepper
  66. Antioxidant, sensory, and functional properties of low-alcoholic IPA beer with Pinus sylvestris L. shoots addition fermented using unconventional yeast
  67. Screening and optimization of extracellular pectinase produced by Bacillus thuringiensis SH7
  68. Determination of polyphenols in Chinese jujube using ultra-performance liquid chromatography–mass spectrometry
  69. Synergistic effects of harpin and NaCl in determining soybean sprout quality under non-sterile conditions
  70. Field evaluation of different eco-friendly alternative control methods against Panonychus citri [Acari: Tetranychidae] spider mite and its predators in citrus orchards
  71. Exploring the antimicrobial potential of biologically synthesized zero valent iron nanoparticles
  72. NaCl regulates goldfish growth and survival at three food supply levels under hypoxia
  73. An exploration of the physical, optical, mechanical, and radiation shielding properties of PbO–MgO–ZnO–B2O3 glasses
  74. A novel statistical modeling of air pollution and the COVID-19 pandemic mortality data by Poisson, geometric, and negative binomial regression models with fixed and random effects
  75. Treatment activity of the injectable hydrogels loaded with dexamethasone In(iii) complex on glioma by inhibiting the VEGF signaling pathway
  76. An alternative approach for the excess lifetime cancer risk and prediction of radiological parameters
  77. Panax ginseng leaf aqueous extract mediated green synthesis of AgNPs under ultrasound condition and investigation of its anti-lung adenocarcinoma effects
  78. Study of hydrolysis and production of instant ginger (Zingiber officinale) tea
  79. Novel green synthesis of zinc oxide nanoparticles using Salvia rosmarinus extract for treatment of human lung cancer
  80. Evaluation of second trimester plasma lipoxin A4, VEGFR-1, IL-6, and TNF-α levels in pregnant women with gestational diabetes mellitus
  81. Antidiabetic, antioxidant and cytotoxicity activities of ortho- and para-substituted Schiff bases derived from metformin hydrochloride: Validation by molecular docking and in silico ADME studies
  82. Antioxidant, antidiabetic, antiglaucoma, and anticholinergic effects of Tayfi grape (Vitis vinifera): A phytochemical screening by LC-MS/MS analysis
  83. Identification of genetic polymorphisms in the stearoyl CoA desaturase gene and its association with milk quality traits in Najdi sheep
  84. Cold-acclimation effect on cadmium absorption and biosynthesis of polyphenolics, and free proline and photosynthetic pigments in Spirogyra aequinoctialis
  85. Analysis of secondary metabolites in Xinjiang Morus nigra leaves using different extraction methods with UPLC-Q/TOF-MS/MS technology
  86. Nanoarchitectonics and performance evaluation of a Fe3O4-stabilized Pickering emulsion-type differential pressure plugging agent
  87. Investigating pyrolysis characteristics of Shengdong coal through Py-GC/MS
  88. Extraction, phytochemical characterization, and antifungal activity of Salvia rosmarinus extract
  89. Introducing a novel and natural antibiotic for the treatment of oral pathogens: Abelmoschus esculentus green-formulated silver nanoparticles
  90. Optimization of gallic acid-enriched ultrasonic-assisted extraction from mango peels
  91. Effect of gamma rays irradiation in the structure, optical, and electrical properties of samarium doped bismuth titanate ceramics
  92. Combinatory in silico investigation for potential inhibitors from Curcuma sahuynhensis Škorničk. & N.S. Lý volatile phytoconstituents against influenza A hemagglutinin, SARS-CoV-2 main protease, and Omicron-variant spike protein
  93. Physical, mechanical, and gamma ray shielding properties of the Bi2O3–BaO–B2O3–ZnO–As2O3–MgO–Na2O glass system
  94. Twofold interpenetrated 3D Cd(ii) complex: Crystal structure and luminescent property
  95. Study on the microstructure and soil quality variation of composite soil with soft rock and sand
  96. Ancient spring waters still emerging and accessible in the Roman Forum area: Chemical–physical and microbiological characterization
  97. Extraction and characterization of type I collagen from scales of Mexican Biajaiba fish
  98. Finding small molecular compounds to decrease trimethylamine oxide levels in atherosclerosis by virtual screening
  99. Prefatory in silico studies and in vitro insecticidal effect of Nigella sativa (L.) essential oil and its active compound (carvacrol) against the Callosobruchus maculatus adults (Fab), a major pest of chickpea
  100. Polymerized methyl imidazole silver bromide (CH3C6H5AgBr)6: Synthesis, crystal structures, and catalytic activity
  101. Using calcined waste fish bones as a green solid catalyst for biodiesel production from date seed oil
  102. Influence of the addition of WO3 on TeO2–Na2O glass systems in view of the feature of mechanical, optical, and photon attenuation
  103. Naringin ameliorates 5-fluorouracil elicited neurotoxicity by curtailing oxidative stress and iNOS/NF-ĸB/caspase-3 pathway
  104. GC-MS profile of extracts of an endophytic fungus Alternaria and evaluation of its anticancer and antibacterial potentialities
  105. Green synthesis, chemical characterization, and antioxidant and anti-colorectal cancer effects of vanadium nanoparticles
  106. Determination of caffeine content in coffee drinks prepared in some coffee shops in the local market in Jeddah City, Saudi Arabia
  107. A new 3D supramolecular Cu(ii) framework: Crystal structure and photocatalytic characteristics
  108. Bordeaux mixture accelerates ripening, delays senescence, and promotes metabolite accumulation in jujube fruit
  109. Important application value of injectable hydrogels loaded with omeprazole Schiff base complex in the treatment of pancreatitis
  110. Color tunable benzothiadiazole-based small molecules for lightening applications
  111. Investigation of structural, dielectric, impedance, and mechanical properties of hydroxyapatite-modified barium titanate composites for biomedical applications
  112. Metal gel particles loaded with epidermal cell growth factor promote skin wound repair mechanism by regulating miRNA
  113. In vitro exploration of Hypsizygus ulmarius (Bull.) mushroom fruiting bodies: Potential antidiabetic and anti-inflammatory agent
  114. Alteration in the molecular structure of the adenine base exposed to gamma irradiation: An ESR study
  115. Comprehensive study of optical, thermal, and gamma-ray shielding properties of Bi2O3–ZnO–PbO–B2O3 glasses
  116. Lewis acids as co-catalysts in Pd-based catalyzed systems of the octene-1 hydroethoxycarbonylation reaction
  117. Synthesis, Hirshfeld surface analysis, thermal, and selective α-glucosidase inhibitory studies of Schiff base transition metal complexes
  118. Protective properties of AgNPs green-synthesized by Abelmoschus esculentus on retinal damage on the virtue of its anti-inflammatory and antioxidant effects in diabetic rat
  119. Effects of green decorated AgNPs on lignin-modified magnetic nanoparticles mediated by Cydonia on cecal ligation and puncture-induced sepsis
  120. Treatment of gastric cancer by green mediated silver nanoparticles using Pistacia atlantica bark aqueous extract
  121. Preparation of newly developed porcelain ceramics containing WO3 nanoparticles for radiation shielding applications
  122. Utilization of computational methods for the identification of new natural inhibitors of human neutrophil elastase in inflammation therapy
  123. Some anticancer agents as effective glutathione S-transferase (GST) inhibitors
  124. Clay-based bricks’ rich illite mineral for gamma-ray shielding applications: An experimental evaluation of the effect of pressure rates on gamma-ray attenuation parameters
  125. Stability kinetics of orevactaene pigments produced by Epicoccum nigrum in solid-state fermentation
  126. Treatment of denture stomatitis using iron nanoparticles green-synthesized by Silybum marianum extract
  127. Characterization and antioxidant potential of white mustard (Brassica hirta) leaf extract and stabilization of sunflower oil
  128. Characteristics of Langmuir monomolecular monolayers formed by the novel oil blends
  129. Strategies for optimizing the single GdSrFeO4 phase synthesis
  130. Oleic acid and linoleic acid nanosomes boost immunity and provoke cell death via the upregulation of beta-defensin-4 at genetic and epigenetic levels
  131. Unraveling the therapeutic potential of Bombax ceiba roots: A comprehensive study of chemical composition, heavy metal content, antibacterial activity, and in silico analysis
  132. Green synthesis of AgNPs using plant extract and investigation of its anti-human colorectal cancer application
  133. The adsorption of naproxen on adsorbents obtained from pepper stalk extract by green synthesis
  134. Treatment of gastric cancer by silver nanoparticles encapsulated by chitosan polymers mediated by Pistacia atlantica extract under ultrasound condition
  135. In vitro protective and anti-inflammatory effects of Capparis spinosa and its flavonoids profile
  136. Wear and corrosion behavior of TiC and WC coatings deposited on high-speed steels by electro-spark deposition
  137. Therapeutic effects of green-formulated gold nanoparticles by Origanum majorana on spinal cord injury in rats
  138. Melanin antibacterial activity of two new strains, SN1 and SN2, of Exophiala phaeomuriformis against five human pathogens
  139. Evaluation of the analgesic and anesthetic properties of silver nanoparticles supported over biodegradable acacia gum-modified magnetic nanoparticles
  140. Review Articles
  141. Role and mechanism of fruit waste polyphenols in diabetes management
  142. A comprehensive review of non-alkaloidal metabolites from the subfamily Amaryllidoideae (Amaryllidaceae)
  143. Discovery of the chemical constituents, structural characteristics, and pharmacological functions of Chinese caterpillar fungus
  144. Eco-friendly green approach of nickel oxide nanoparticles for biomedical applications
  145. Advances in the pharmaceutical research of curcumin for oral administration
  146. Rapid Communication
  147. Determination of the contents of bioactive compounds in St. John’s wort (Hypericum perforatum): Comparison of commercial and wild samples
  148. Retraction
  149. Retraction of “Two mixed-ligand coordination polymers based on 2,5-thiophenedicarboxylic acid and flexible N-donor ligands: The protective effect on periodontitis via reducing the release of IL-1β and TNF-α”
  150. Topical Issue on Phytochemicals, biological and toxicological analysis of aromatic medicinal plants
  151. Anti-plasmodial potential of selected medicinal plants and a compound Atropine isolated from Eucalyptus obliqua
  152. Anthocyanin extract from black rice attenuates chronic inflammation in DSS-induced colitis mouse model by modulating the gut microbiota
  153. Evaluation of antibiofilm and cytotoxicity effect of Rumex vesicarius methanol extract
  154. Chemical compositions of Litsea umbellata and inhibition activities
  155. Green synthesis, characterization of silver nanoparticles using Rhynchosia capitata leaf extract and their biological activities
  156. GC-MS analysis and antibacterial activities of some plants belonging to the genus Euphorbia on selected bacterial isolates
  157. The abrogative effect of propolis on acrylamide-induced toxicity in male albino rats: Histological study
  158. A phytoconstituent 6-aminoflavone ameliorates lipopolysaccharide-induced oxidative stress mediated synapse and memory dysfunction via p-Akt/NF-kB pathway in albino mice
  159. Anti-diabetic potentials of Sorbaria tomentosa Lindl. Rehder: Phytochemistry (GC-MS analysis), α-amylase, α-glucosidase inhibitory, in vivo hypoglycemic, and biochemical analysis
  160. Assessment of cytotoxic and apoptotic activities of the Cassia angustifolia aqueous extract against SW480 colon cancer
  161. Biochemical analysis, antioxidant, and antibacterial efficacy of the bee propolis extract (Hymenoptera: Apis mellifera) against Staphylococcus aureus-induced infection in BALB/c mice: In vitro and in vivo study
  162. Assessment of essential elements and heavy metals in Saudi Arabian rice samples underwent various processing methods
  163. Two new compounds from leaves of Capparis dongvanensis (Sy, B. H. Quang & D. V. Hai) and inhibition activities
  164. Hydroxyquinoline sulfanilamide ameliorates STZ-induced hyperglycemia-mediated amyleoid beta burden and memory impairment in adult mice
  165. An automated reading of semi-quantitative hemagglutination results in microplates: Micro-assay for plant lectins
  166. Inductively coupled plasma mass spectrometry assessment of essential and toxic trace elements in traditional spices consumed by the population of the Middle Eastern region in their recipes
  167. Phytochemical analysis and anticancer activity of the Pithecellobium dulce seed extract in colorectal cancer cells
  168. Impact of climatic disturbances on the chemical compositions and metabolites of Salvia officinalis
  169. Physicochemical characterization, antioxidant and antifungal activities of essential oils of Urginea maritima and Allium sativum
  170. Phytochemical analysis and antifungal efficiency of Origanum majorana extracts against some phytopathogenic fungi causing tomato damping-off diseases
  171. Special Issue on 4th IC3PE
  172. Graphene quantum dots: A comprehensive overview
  173. Studies on the intercalation of calcium–aluminium layered double hydroxide-MCPA and its controlled release mechanism as a potential green herbicide
  174. Synergetic effect of adsorption and photocatalysis by zinc ferrite-anchored graphitic carbon nitride nanosheet for the removal of ciprofloxacin under visible light irradiation
  175. Exploring anticancer activity of the Indonesian guava leaf (Psidium guajava L.) fraction on various human cancer cell lines in an in vitro cell-based approach
  176. The comparison of gold extraction methods from the rock using thiourea and thiosulfate
  177. Special Issue on Marine environmental sciences and significance of the multidisciplinary approaches
  178. Sorption of alkylphenols and estrogens on microplastics in marine conditions
  179. Cytotoxic ketosteroids from the Red Sea soft coral Dendronephthya sp.
  180. Antibacterial and biofilm prevention metabolites from Acanthophora spicifera
  181. Characteristics, source, and health risk assessment of aerosol polyaromatic hydrocarbons in the rural and urban regions of western Saudi Arabia
  182. Special Issue on Advanced Nanomaterials for Energy, Environmental and Biological Applications - Part II
  183. Green synthesis, characterization, and evaluation of antibacterial activities of cobalt nanoparticles produced by marine fungal species Periconia prolifica
  184. Combustion-mediated sol–gel preparation of cobalt-doped ZnO nanohybrids for the degradation of acid red and antibacterial performance
  185. Perinatal supplementation with selenium nanoparticles modified with ascorbic acid improves hepatotoxicity in rat gestational diabetes
  186. Evaluation and chemical characterization of bioactive secondary metabolites from endophytic fungi associated with the ethnomedicinal plant Bergenia ciliata
  187. Enhancing photovoltaic efficiency with SQI-Br and SQI-I sensitizers: A comparative analysis
  188. Nanostructured p-PbS/p-CuO sulfide/oxide bilayer heterojunction as a promising photoelectrode for hydrogen gas generation
Heruntergeladen am 29.9.2025 von https://www.degruyterbrill.com/document/doi/10.1515/chem-2022-0335/html
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