Proc Natl Acad Sci U S A
January 2025
CO mineralization, a process where CO reacts with minerals to form stable carbonates, presents a sustainable approach for CO sequestration and mitigation of global warming. While the crucial role of water in regulating CO mineralization efficiency is widely acknowledged, a comprehensive understanding of the underlying mechanisms remains elusive. This study employs a combined experimental and atomistic simulation approach to elucidate the intricate mechanisms governing moisture-driven carbonation kinetics of calcium-bearing minerals.
View Article and Find Full Text PDFThe feasibility of carbon mineralization relies on the carbonation efficiency of CO-reactive minerals, which is largely governed by the water content and state within material mesopores. Yet, the pivotal role of confined water in regulating carbonation efficiency at the nanoscale is not well understood. Here, we show that the maximum CO intake occurs at an optimal relative humidity (RH) when capillary condensation initiates within the hydrophilic mesopores.
View Article and Find Full Text PDFFabricating transition metal selenide (TMSe) anode materials with rapid K diffusion and high-rate performance is crucial for the advancement of potassium-ion batteries (PIBs), yet it remains a challenge. In this study, a Cu-doped CoSe@N-doped carbon anode with an optimal concentration of Cu-doped and yolk-shell structure (denoted as Cu-CoSe@NC-2) is developed to enhance the reaction kinetics and cycling life. The Cu-doped modulates the electronic structure of the CoSe interface, improves the diffusion and adsorption of K, and further promotes the charge transport efficiency, as demonstrated by theoretical calculations and experimental results.
View Article and Find Full Text PDFAlcoholic beverages are among the most widely enjoyed leisure drinks around the world. However, irresponsible drinking habits can have detrimental effects on human health. Therefore, exploring strategies to alleviate discomfort following alcohol consumption would be beneficial for individuals who inevitably need to consume alcohol.
View Article and Find Full Text PDFThe poor alkali resistance of nano-glassy fiber (NGF) hinders its application in aggressive alkaline environments like cement and alkaline wastewater. This study introduced a potential strategy to enhance the alkali resistance of NGF based on the distinct atomic-scale interactions between CO molecules and NGF ions at high temperatures. The short-range structure in the NGF-CO system was elucidated through the pair distribution functions and coordination numbers of ion-oxygen pairs and second-nearest-neighbor ion-ion pairs.
View Article and Find Full Text PDFThis study examined the longer-term individual- and school-level changes in students 7 months after a 1-hour delay in school start time (SST). Two cohorts of grade 11 students (N = 227; 60.8% female, age = 17.
View Article and Find Full Text PDFBackground And Purpose: Icariin, an 8-prenylated flavonoid glycoside, is an anabolic agent that could exert rapid estrogenic actions via ligand-independent activation of estrogen receptor alpha (ERα) in osteoblastic cells to promote osteogenesis. However, relatively little is known about its direct cellular target, its protective effects, and cell adhesion activities in bone marrow stromal cells (BMSCs) against microgravity. In the present study, the effects of icariin on osteogenesis and cell adhesion under microgravity were examined with the involvement of integrin receptor α5β1, connexin 43, and CAMs.
View Article and Find Full Text PDFObjectives: The aim of this study was to present key technologic and regulatory milestones in spinal cord stimulation (SCS) for managing chronic pain on a narrative timeline with visual representation, relying on original sources to the extent possible.
Materials And Methods: We identified technical advances in SCS that facilitated and enhanced treatment on the basis of scientific publications and approvals from the United States (US) Food and Drug Administration (FDA). We presented milestones limited to first use in key indications and in the context of new technology validation.
Background: Stem cell-based transplantation therapy holds promise for peripheral nerve injury treatment, but adult availability is limited. A cell culture protocol utilizing a small-molecule cocktail effectively reprogrammed stem cells from apical papilla (SCAPs) into neural progenitor cells, subsequently differentiating into neuron-like cells. This study aims to evaluate neural-induced SCAPs, with and without small-molecule cocktail, for sciatic nerve repair potential.
View Article and Find Full Text PDFBackground: Disrupted sleep and rest-activity pattern are common clinical features in depressed individuals. This meta-analysis compared sleep and circadian rest-activity rhythms in people with major depressive disorder (MDD) or depressive symptoms and healthy controls.
Methods: Eligible studies were identified in five databases up to December 2023.
Super sulfate cement (SSC) emerges as a sustainable alternative to ordinary Portland cement, boasting minimal carbon emissions and exceptional performance. As the quest for eco-friendly alternatives intensifies, there's a growing focus on exploring alkaline and sulfate activators conducive to SSC's environmental goals. This study delves into the viability of utilizing MgO as an alkaline activator in producing MgO-based supersulfated cement, while also investigating the impact of various industrial by-product gypsums on its performance.
View Article and Find Full Text PDFMunicipal solid waste incineration fly ash (IFA) designated as hazardous waste poses risks to environment and human health. This study introduces a novel approach for the stabilization and solidification (S/S) of IFA: a combined approach involving alkali treatment and immobilization in low-carbon supersulfated cement (SSC). The impact of varying temperatures of alkali solution on the chemical and mineralogical compositions, as well as the pozzolanic reactivity of IFA, and the removal efficiency of heavy metals and metallic aluminum (Al) were examined.
View Article and Find Full Text PDFCommunity Dent Oral Epidemiol
June 2024
Objectives: The aim of this study was to present key findings from the 2019 national adult oral health survey in Singapore (NAOHS).
Methods: A multi-stage stratified sampling method was used to recruit participants for a representative national adult oral health survey. A total of 12 212 households were randomly selected from the National Database on Dwellings in Singapore.
Oleanolic acid (OA) is previously shown to exert bone protective effects in aged animals. However, its role in regulating osteoblastic vitamin D bioactivation, which is one of major causes of age-related bone loss, remains unclear. Our results revealed that treatment of OA significantly increased skeletal CYP27B1 expression and circulating 1,25(OH)D in ovariectomized mice (p <0.
View Article and Find Full Text PDFCommunity Dent Oral Epidemiol
June 2024
Objectives: Prevention complements the curative management of oral diseases. Effective preventive interventions involve the adoption of oral health promoting behaviours. Little is known about the awareness of oral disease and its prevention among Singaporean adults as well as their prevailing oral health attitudes and behaviours.
View Article and Find Full Text PDFObjective: Sleep and circadian disturbance is highly comorbid with a range of psychological disorders, especially major depressive disorder (MDD). In view of the complexity of sleep and circadian problems in MDD, this study aimed to evaluate the efficacy of a group-based transdiagnostic intervention for sleep and circadian dysfunction (TranS-C) for improving depressive symptoms and sleep and circadian functions.
Method: One hundred fifty-two adults diagnosed with comorbid MDD and sleep and circadian dysfunctions were randomized into TranS-C group treatment (TranS-C; = 77) or care as usual (CAU; = 75) control group.
Previous research has suggested that individuals with major depressive disorder (MDD) experienced alterations in sleep and activity levels. However, the temporal associations among sleep, activity levels, mood, and daytime symptoms in MDD have not been fully investigated. The present study aimed to fill this gap by utilizing real-time data collected across time points and days.
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