Biological Trace Element Research, Journal Year: 2024, Volume and Issue: unknown
Published: Dec. 4, 2024
Language: Английский
Results in Surfaces and Interfaces, Journal Year: 2025, Volume and Issue: unknown, P. 100438 - 100438
Published: Jan. 1, 2025
Language: Английский
Citations
0
Sakarya University Journal of Science, Journal Year: 2025, Volume and Issue: 29(1), P. 39 - 49
Published: Feb. 20, 2025
In this study, carbon/carbon (C/C) composite structures were produced by depositing a pyrolytic carbon matrix around fibers found in three-dimensional (3D) preform using the Chemical Vapor Infiltration (CVI) method. The preforms used as starting materials orthogonal fiber geometry and 3D knitting structure. CVI process performed CVD (Chemical Deposition) device was carried out at 1250 ℃, under 2 mbar pressure, with methane gas flow rate of 2.0 lt/min, for total period 312 hours gradually applied an inert atmosphere consisting argon nitrogen gases. block piece processed to obtain small test samples; tensile three-point bending tests pieces, their densities measured. Samples subjected in-vitro biodegradation 0.9 % isotonic sodium chloride solution weight 37 °C 21 days. density apparent porosity samples measured be 1.395 g/cm³ 13.424%, respectively. strength C/C composites determined 252.5±6.20 MPa 236.6±25.7 MPa, At end days, ratio calculated 0.0095%.
Language: Английский
Citations
0
ACS Omega, Journal Year: 2025, Volume and Issue: unknown
Published: April 11, 2025
The development of biocompatible biopolymer foams loaded with antibiotics is crucial to advancing drug delivery systems in biomedical engineering. These materials offer controlled release and specialized functionalities for improved therapeutic outcomes. This study presents the characterization antimicrobial polymeric biofoam amoxicillin (AMX). sustainable synthesis these involves a cost-effective, eco-friendly method that incorporates natural starch within poly(vinyl alcohol) (PVA) through an aldehyde cross-linking/stabilizing process. highly porous structure biofoams enabled effective impregnation AMX using innovative process involving ultrasonication vacuum pressure maximize efficiency minimize biomaterial loss. findings demonstrate potential PVA/starch-based as versatile desirable physicochemical biological characteristics. Detailed investigations were conducted evaluate morphological features, chemical properties, swelling behavior, vitro biodegradability, profiles, cell culture, activity tests prepared samples. Investigating effect loading under laboratory conditions on its profile studying biodegradation various environments over time represent critical aspect this research. optimal physiological potent inhibition bacterial growth against Escherichia coli Staphylococcus aureus microorganisms by AMX-loaded highlight their applications. show promise vivo administration local treatment infections.
Language: Английский
Citations
0
Materials, Journal Year: 2024, Volume and Issue: 17(19), P. 4895 - 4895
Published: Oct. 6, 2024
Boron is a naturally occurring trace chemical element. High concentrations of boron in nature can adversely affect biological systems and cause severe pollution to the ecological environment. We examined method effectively remove ions from water using sugarcane bagasse biochar agricultural waste with NH3 nanobubbles (10% 90% N2). studied effects solution concentration, pH, adsorption time on by modified biochar. At same time, possibility magnesium chloride enhance capacity was explored. The carbonization temperature investigated thermogravimetric analysis. It characterized XRD, SEM, BET results showed that, under alkaline conditions above pH 9, positively charged improved double-layer effect nanobubbles, because existed form negatively borate B(OH)4− anion groups. Moreover, cations nanobubble could adsorb boron. When coagulate each other, removed significant extent. Extended DLVO theory adopted model interaction between 36 mg/g at room according Langmuir isotherm. adsorbed FT-IR XPS ammonia be zeolite molecular sieves heating. an aqueous via MgCl2 addition.
Language: Английский
Citations
3
Biomass Conversion and Biorefinery, Journal Year: 2024, Volume and Issue: unknown
Published: Jan. 26, 2024
Abstract Activation of biomass before pyrolysis with various chemicals significantly affects the surface area and porosity, chemical composition, formation distribution functional groups on biochar produced. For this purpose, raw tea waste (RTW) was mixed potassium nitrate (KNO 3 ), sodium carbonate (NaKCO borohydride (NaBH 4 ) in solid form pyrolyzed at 500 °C for 1 h. The effects activators char were investigated using DTA-TGA DSC. Compared to conventional pyrolysis, carbonate, nitrate, hydrides increase gasification by catalyzing decomposition cellulose lignin. effect NaBH graphitization deoxidation carbon is higher than that carbonates nitrides. In addition, all prepared samples characterized XRD, SEM, FT-IR, elemental analysis, N 2 adsorption–desorption. While treatment RTW KNO NaKCO increased hydroxylation biochar, decreased increasing dehydrogenation dehydroxylation. Increasing boron content led material hydratation NaBO . pore results showed nitrates have insignificant while almost doubles total volume forming hydrogen.
Language: Английский
Citations
2
Journal of environmental chemical engineering, Journal Year: 2024, Volume and Issue: 12(5), P. 113630 - 113630
Published: July 20, 2024
In the current study, sugarcane bagasse-derived biochar catalysts were synthesized by doping with metal-free heteroatoms including nitrogen, phosphorus, oxygen, and boron their efficacy was tested for catalytic co-pyrolysis of walnut shells (WS) palm oil fatty acid distillate (PFAD) using Py-GC/MS. The catalysts' properties effectiveness on co-pyrolytic bio-oil (overall product distribution, selectivity towards aliphatic aromatic hydrocarbons, carbon number ranges) extensively examined. Among various considered, boron-doped (BCB) demonstrated effective performance due to an improved surface area, porosity, acidity resulted in a significantly increased hydrocarbon yield, particularly gasoline diesel range, preference over hydrocarbons. optimum quality achieved at feedstock-to-catalyst ratio 2:1 pyrolysis temperature 750 °C, yield 90.8 % 63.5 %. Overall, study underscores role BCB fostering deoxygenation, decarboxylation, via thermal pathways, highlighting potential non-metallic doped biochars upgrading.
Language: Английский
Citations
2
Chemical and Biological Technologies in Agriculture, Journal Year: 2024, Volume and Issue: 11(1)
Published: Oct. 10, 2024
Boron (B) is critical for plant growth, yet its movement in soil often hindered by leaching and adsorption, leading to deficiencies. Tackling these issues essential boosting agricultural productivity, especially plants like Eucalyptus with high B needs. This paper aims address challenges evaluating B-doped biochar composites (biochar-B) that enhance distribution stability the soil, focusing on grandis cultivation two distinct oxisol types. Biochar-B were created using shrimp carcass (FSC), chicken manure (FCM) sewage sludge (FSS), combined boric acid (BA) borax (BX), pyrolyzed at 300 °C 550 °C. The experimental design was a completely randomized (CRD) three replicates. Fourier transform infrared spectroscopy (FTIR) analysis confirmed successful integration interaction organic matrices, highlighting functional groups responsible composite properties. facilitated development of highly predictive partial least squares (PLS) regression models (R2pred ~ 0.8). FSC-BA showed notable thermal stability, retention availability, enhancing release kinetics. These findings emphasize importance considering soluble rate applications cultivation. use provides sustainable method gradual release, potentially outperforming conventional fertilization techniques. approach may lead improved growth productivity. Further field investigations are recommended order validate refine strategies; thus, benefiting range crops.
Language: Английский
Citations
0
Biological Trace Element Research, Journal Year: 2024, Volume and Issue: unknown
Published: Dec. 4, 2024
Language: Английский
Citations
0