Polymers (Basel)
October 2024
The decline in fossil fuels on the earth has become a primary global concern which has urged mankind to explore other viable alternatives. The exorbitant use of fuels by an ever-increasing global population demands a huge production of energy from renewable sources. Renewable energy sources like the sun, wind, and tides have been established as promising substitutes for fossil fuels.
View Article and Find Full Text PDFMaterials (Basel)
January 2024
The depletion of reliable energy sources and the environmental and climatic repercussions of polluting energy sources have become global challenges. Hence, many countries have adopted various renewable energy sources including hydrogen. Hydrogen is a future energy carrier in the global energy system and has the potential to produce zero carbon emissions.
View Article and Find Full Text PDFNanocrystalline cellulose (NCC) can be converted into carbon materials for the fabrication of lithium-ion batteries (LIBs) as well as serve as a substrate for the incorporation of transition metal oxides (TMOs) to restrain the volume expansion, one of the most significant challenges of TMO-based LIBs. To improve the electrochemical performance and enhance the longer cycling stability of LIBs, a nanocrystalline cellulose-supported iron oxide (FeO) composite (denoted as NCC-FeO) is synthesized and utilized as electrodes in LIBs. The obtained NCC-FeO electrode exhibited stable cycling performance, better capacity, and high-rate capacity, and delivered a specific discharge capacity of 576.
View Article and Find Full Text PDFRecent studies have shown that monocarbonyl analogues of curcumin (MACs) and 1H-pyrazole heterocycle both demonstrated promising anticancer activities, in which several compounds containing these scaffolds could target EGFR. In this research, 24 curcumin analogues containing 1H-pyrazole (a1-f4) were synthesized and characterized by using modern spectroscopic techniques. Firstly, synthetic MACs were screened for cytotoxicity against human cancer cell lines such as SW480, MDA-MB-231 and A549, from which the 10 most potential cytotoxic compounds were identified and selected.
View Article and Find Full Text PDFDirect oxidation of methane over oxo-doped ZIF-204, a bio-mimetic metal-organic framework, is investigated under first-principles calculations based on density functional theory. In the pristine ZIF-204, the tetrahedral methane molecule anchors to an open monocopper site the so-called η configuration with a physisorption energy of 0.24 eV.
View Article and Find Full Text PDFThe large volumetric expansion of conversion-type anode materials (CTAMs) based on transition-metal oxides is still a big challenge for lithium-ion batteries (LIBs). An obtained nanocomposite was established by tin oxide (SnO) nanoparticles embedding in cellulose nanofiber (SnO-CNFi), and was developed in our research to take advantage of the tin oxide's high theoretical specific capacity and the cellulose nanofiber support structure to restrain the volume expansion of transition-metal oxides. The nanocomposite utilized as electrodes in lithium-ion batteries not only inhibited volume growth but also contributed to enhancing electrode electrochemical performance, resulting in the good capacity maintainability of the LIBs electrode during the cycling process.
View Article and Find Full Text PDFThree-dimensional covalent organic frameworks possess hierarchical nanopores, enormous surface areas with high porosity, and open positions. The synthesis of large crystals of three-dimensional covalent organic frameworks is a challenge, since different structures are generated during the synthesis. Presently, their synthesis with new topologies for promising applications has been developed by the use of building units with varied geometries.
View Article and Find Full Text PDFBackground: Metabolic syndrome is one of the most common public health concerns in the 21st century. Several previous studies have shown an association between increased serum ferritin levels and other components of metabolic syndrome and the risk of metabolic syndrome. They conclude that ferritin can be viewed as a predictor of metabolic syndrome risk.
View Article and Find Full Text PDFThe rate capability and poor cycling stability of lithium-ion batteries (LIBs) are predominantly caused by the large volume expansion upon cycling and poor electrical conductivity of manganese dioxide (MnO), which also exhibits the highest theoretical capacity among manganese oxides. In this study, a nanocomposite of nanosized MnO and pyrolyzed nanocrystalline cellulose (CNC) was prepared with high electrical conductivity to enhance the electrochemical performance of LIBs. The nanocomposite electrode showed an initial discharge capacity of 1302 mAh g at 100 mA g and exhibited a high discharge capacity of 305 mAh g after 1000 cycles.
View Article and Find Full Text PDFOne of the biggest challenges in the commercialization of tin dioxide (SnO-based lithium-ion battery (LIB) electrodes is the volume expansion of SnO during the charge-discharge process. Additionally, the aggregation of SnO also deteriorates the performance of anode materials. In this study, we prepared SnO nanoflowers (NFs) using nanocrystalline cellulose (CNC) to improve the surface area, prevent the particle aggregation, and alleviate the change in volume of LIB anodes.
View Article and Find Full Text PDFThis cost-effectiveness analysis was conducted from the patient's perspective alongside a randomized controlled trial comparing corifollitropin alfa with follitropin beta for a single stimulation cycle. Only unit costs paid by patients are included in this analysis. The incremental cost-effectiveness ratio was calculated.
View Article and Find Full Text PDFObjective: To examine trends of ED presentations with a mental health (MH) diagnosis in Australia and its jurisdictions by diagnostic group between 2004-05 and 2016-17.
Methods: Data comprised ED presentations with a principal diagnosis of ICD-10-AM F00-F99 (MH ) captured within the National Non-Admitted Patient Emergency Department Care Database. Trends in absolute number and rates of MH presentations per 10 000 population were assessed as differences (x-fold) and annual growth rates (average and compound).
Objectives: To examine trends in ED presentations with a mental health diagnosis (MH ) in Australia by jurisdiction and by sex, between 2004-05 and 2016-17.
Methods: Data were captured in the National Non-Admitted Patient Emergency Department Care Database. Outcomes were the proportion of ED presentations with a principal diagnosis of ICD-10-AM F00-F99 (MH ), and the rate of all ED and MH presentations per 10 000 population.
Department of Chemical and Biological Engineering, Gachon University, Seongnam, Gyeonggi 461-701, Korea Among metallic nanomaterials used as plasmonic structures in organic photovoltaics (OPVs), gold (Au) and silver (Ag) nanoparticles (NPs) have attracted significant attention owing to their remarkable localized surface plasmon resonance optical properties and relatively high scattering efficiency. In this study, we propose rough-surface Au@Ag core-shell NPs (RSAu@Ag NPs) as an advanced plasmonic material to combine the high scattering power of Ag NPs and broad spectral response of Au NPs in the long-wavelength range. We coat an Au nanoflower core with a thin Ag shell to fabricate the RSAu@Ag NPs.
View Article and Find Full Text PDFObjectives: The present study aims to explore for Australia: (i) the trends of ED presentations with a mental health (MH) diagnosis by age group; and (ii) whether those trends differ from all ED presentations.
Methods: ED presentations to Australian public hospitals, 2004-05 to 2016-17 were captured in the National Non-Admitted Patient Emergency Department Care Database. We assessed total change and annual rate of change in the number and rates of presentations per 10 000 population for all presentations and those with a MH principal diagnosis (ICD-10-AM F00 to F99, MH ).
Ongoing fiscal stability has enabled the National Assembly in Vietnam to turn its attention to improving the health and well-being of women and children. Training pediatric health care professionals in the recognition and response to child abuse presentations in the emergency setting has the potential to improve outcomes for the disproportionate number of vulnerable children presenting to the emergency setting with nonaccidental injuries. This study explored the training needs and expectations of the staff preparing to undertake such a clinical training program.
View Article and Find Full Text PDFBackground: Altered expression of cytokines has been suggested as a specific event for the maintenance and progression of endometriomas. Few data exist on cytokine expression in endometriomas compared with benign and malignant ovarian tumours. Hence, serum and cyst fluid levels of interleukin (IL)-6, IL-8 and tumour necrosis factor-alpha (TNF-alpha) were evaluated in women with endometriomas and compared with those in women with benign or malignant ovarian tumours.
View Article and Find Full Text PDFObjective: To investigate the diagnostic relevance of serum cytokine concentrations in ectopic pregnancy (EP).
Design: Cohort study.
Setting: University hospital.