Novel pit and fissure sealant with nano-CaF < sub > 2 < /sub > and antibacterial monomer: Fluoride recharge, microleakage, sealing ability and cytotoxicity
The objectives of this study were to: (1) develop a novel bioactive sealant containing calcium fluoride nanoparticles (nCaF2) and antibacterial dimethylaminohexadecyl methacrylate (DMAHDM), and (2) investigate mechanical performance, F recharge and re-release, microleakage, sealing ability and cytotoxicity. Helioseal F served as commercial control. The initial F release from sealant containing 20% nCaF2 was 25-fold that of Helioseal F. After ion exhaustion and recharge, the F re-release from bioactive sealant did not decrease with increasing number of recharge and re-release cycles. Elastic modulus of new bioactive sealant...
Source: Cancer Control - April 7, 2024 Category: Cancer & Oncology Authors: Xiuzhi Fei Yuncong Li Qian Zhang Chunli Tian Yue Li Qiannan Dong Michael D Weir Negar Homayounfar Thomas W Oates Satoshi Imazato Quan Dai Hockin H K Xu Jianping Ruan Source Type: research
Species selective concentration and determination of nano-selenium and inorganic selenium species in environmental waters by micropore membrane filtration and ICP-MS
In this study, a micropore membrane filtration-based method followed by ICP-MS analysis was proposed for the selective concentration and determination of nSe in the water column. Polyvinylidene fluoride (PVDF) and nylon micropore filtration membranes were proven to efficiently capture nSe under optimal conditions (retention > 91.0 ± 0.87%). At the same time, ionic selenite and selenate could escape from the membranes, realizing the isolation of nSe and ionic Se species. The interference of dissolved organic matter (DOM) during separation can be resolved by adding Ca(II) ions, which can induce the formation of DOM aggre...
Source: Analytical and Bioanalytical Chemistry - April 7, 2024 Category: Chemistry Authors: Jiangyun Song Ronggang Zheng Rui Yang Sujuan Yu Junping Xiao Jingfu Liu Source Type: research
Species selective concentration and determination of nano-selenium and inorganic selenium species in environmental waters by micropore membrane filtration and ICP-MS
In this study, a micropore membrane filtration-based method followed by ICP-MS analysis was proposed for the selective concentration and determination of nSe in the water column. Polyvinylidene fluoride (PVDF) and nylon micropore filtration membranes were proven to efficiently capture nSe under optimal conditions (retention > 91.0 ± 0.87%). At the same time, ionic selenite and selenate could escape from the membranes, realizing the isolation of nSe and ionic Se species. The interference of dissolved organic matter (DOM) during separation can be resolved by adding Ca(II) ions, which can induce the formation of DOM aggre...
Source: Analytical and Bioanalytical Chemistry - April 7, 2024 Category: Chemistry Authors: Jiangyun Song Ronggang Zheng Rui Yang Sujuan Yu Junping Xiao Jingfu Liu Source Type: research
Protective effects of sodium butyrate on fluorosis in rats by regulating bone homeostasis and serum metabolism
In this study, a rat model of fluorosis induced by 100 mg/L sodium fluoride was used to investigate the impact of NaB on bone homeostasis and serum metabolomics. It was found that NaB significantly reduced the levels of bone resorption markers CTX-Ⅰ and TRACP-5B in fluorosis rats. Moreover, NaB increased calcium and magnesium levels in bone, while decreasing phosphorus levels. In addition, NaB improved various bone microstructure parameters, including bone mineral density (BMD), trabecular thickness (Tb. Th), trabecular bone separation (Tb. SP), and structural model index (SMI) in the femur. Notably, NaB intervention als...
Source: Ecotoxicology and Environmental Safety - April 6, 2024 Category: Environmental Health Authors: Ying Li Fengmei Yang Jie Liu Mengqi Jiang Ye Yu Qingyi Zhou Lu Sun Zhuo Zhang Lin Zhou Source Type: research
Artificial Q-Grader: Machine Learning-Enabled Intelligent Olfactory and Gustatory Sensing System
In this study, an artificial Q-grader comprising surface-engineered zinc oxide (ZnO) thin films is developed as the artificial nose, tongue, and AI-based statistical data analysis as the artificial brain for identifying both aroma and flavor chemicals in coffee beans. A poly(vinylidene fluoride-co-hexafluoropropylene)/ZnO thin film transistor (TFT)-based liquid sensor is the artificial tongue, and an Au, Ag, or Pd nanoparticles/ZnO nanohybrid gas sensor is the artificial nose. In order to classify the flavor of coffee beans (acetic acid (sourness), ethyl butyrate and 2-furanmethanol (sweetness), caffeine (bitterness)) and ...
Source: Adv Data - April 6, 2024 Category: Epidemiology Authors: Moonjeong Jang Garam Bae Yeong Min Kwon Jae Hee Cho Do Hyung Lee Saewon Kang Soonmin Yim Sung Myung Jongsun Lim Sun Sook Lee Wooseok Song Ki-Seok An Source Type: research
Protective effects of sodium butyrate on fluorosis in rats by regulating bone homeostasis and serum metabolism
In this study, a rat model of fluorosis induced by 100 mg/L sodium fluoride was used to investigate the impact of NaB on bone homeostasis and serum metabolomics. It was found that NaB significantly reduced the levels of bone resorption markers CTX-Ⅰ and TRACP-5B in fluorosis rats. Moreover, NaB increased calcium and magnesium levels in bone, while decreasing phosphorus levels. In addition, NaB improved various bone microstructure parameters, including bone mineral density (BMD), trabecular thickness (Tb. Th), trabecular bone separation (Tb. SP), and structural model index (SMI) in the femur. Notably, NaB intervention als...
Source: Ecotoxicology and Environmental Safety - April 6, 2024 Category: Environmental Health Authors: Ying Li Fengmei Yang Jie Liu Mengqi Jiang Ye Yu Qingyi Zhou Lu Sun Zhuo Zhang Lin Zhou Source Type: research
On the Chemical Pathways Influencing the Effective Global Warming Potential of Commercial Hydrofluoroolefin Gases
ChemSusChem. 2024 Apr 4:e202400280. doi: 10.1002/cssc.202400280. Online ahead of print.ABSTRACTThe enforcement of a global hydrofluorocarbon (HFC) refrigerant phase down led to the introduction of hydrofluoroolefins (HFOs) as a low Global Warming Potential (GWP) substitute, given their low atmospheric lifetime. However, to this date it is not fully clear the long-term atmospheric fate of HFOs primary degradation products: trifluoro acetaldehyde (TFE), trifluoro acetyl fluoride (TFF), and trifluoroacetic acid (TFA). It particularly concerns the possibility of forming HFC-23, a potent global warming agent. Although the atmos...
Source: ChemSusChem - April 5, 2024 Category: Chemistry Authors: Gabriel Salierno Source Type: research
On the Chemical Pathways Influencing the Effective Global Warming Potential of Commercial Hydrofluoroolefin Gases
ChemSusChem. 2024 Apr 4:e202400280. doi: 10.1002/cssc.202400280. Online ahead of print.ABSTRACTThe enforcement of a global hydrofluorocarbon (HFC) refrigerant phase down led to the introduction of hydrofluoroolefins (HFOs) as a low Global Warming Potential (GWP) substitute, given their low atmospheric lifetime. However, to this date it is not fully clear the long-term atmospheric fate of HFOs primary degradation products: trifluoro acetaldehyde (TFE), trifluoro acetyl fluoride (TFF), and trifluoroacetic acid (TFA). It particularly concerns the possibility of forming HFC-23, a potent global warming agent. Although the atmos...
Source: ChemSusChem - April 5, 2024 Category: Chemistry Authors: Gabriel Salierno Source Type: research
Molecules, Vol. 29, Pages 1638: Resource Recovery of Spent Lithium-Ion Battery Cathode Materials by a Supercritical Carbon Dioxide System
In this study, the supercritical (SC) CO2 was innovatively adapted to enable the recycling of spent lithium-ion batteries (LIBs) based on facilitating the interaction with a binder and dimethyl sulfoxide (DMSO) co-solvent. The results show that the optimum experimental conditions to liberate the cathode particles are processing at a temperature of 70 &deg;C and 80 bar pressure for a duration of 20 min. During the treatment, polyvinylidene fluoride (PVDF) was dissolved in the SC fluid system and collected in the dimethyl sulfoxide (DMSO), as detected by the Fourier Transform Infrared Spectrometer (FTIR). The liberat...
Source: Molecules - April 5, 2024 Category: Chemistry Authors: Yuanpeng Fu Xianshu Dong Bur çak Ebin Tags: Article Source Type: research
Deoxyfluorinated Amidation and Esterification of Carboxylic Acid by Pyridinesulfonyl Fluoride
We report an amide bond formation reaction through deoxyfluorinated carboxylic acids under mild condition using 2-pyridinesulfonyl fluoride.... The content of this RSS Feed (c) The Royal Society of Chemistry (Source: RSC - Chem. Commun. latest articles)
Source: RSC - Chem. Commun. latest articles - April 4, 2024 Category: Chemistry Authors: Anootha Neeliveettil Source Type: research
Amino-functionalized novel biosorbent for effective removal of fluoride from water: process optimization using artificial neural network and mechanistic insights
Environ Sci Pollut Res Int. 2024 Apr 5. doi: 10.1007/s11356-024-33046-x. Online ahead of print.ABSTRACTAqueous fluoride ( F - ) pollution is a global threat to potable water security. The present research envisions the development of novel adsorbents from indigenous Limonia acidissima L. (fruit pericarp) for effective aqueous defluoridation. The adsorbents were characterized using instrumental analysis, e.g., TGA-DTA, ATR-FTIR, SEM-EDS, and XRD. The batch-mode study was performed to investigate the influence of experimental variables. The artificial neural network (ANN) model was employed to validate the adsorption. The ...
Source: Environmental Science and Pollution Research International - April 4, 2024 Category: Environmental Health Authors: Dipankar Jena Anjan Kumar Bej Anil Kumar Giri Prakash Chandra Mishra Source Type: research
Advances and future perspectives of water defluoridation by adsorption technology: A review
Environ Res. 2024 Apr 2;252(Pt 1):118857. doi: 10.1016/j.envres.2024.118857. Online ahead of print.ABSTRACTFluoride contamination in water sources poses a significant challenge to human health and the environment. In recent years, adsorption technology has emerged as a promising approach for water defluoridation due to its efficiency and cost-effectiveness. This review article comprehensively explores the advances in water defluoridation through adsorption processes. Various adsorbents, including natural and synthetic materials, have been investigated for their efficacy in removing fluoride ions from water. The mechanisms ...
Source: Environmental Research - April 3, 2024 Category: Environmental Health Authors: Noureddine El Messaoudi Dison Stracke Pfingsten Franco Sylwia Gubernat Jordana Georgin Zeynep Mine Şenol Zeynep Ci ğeroğlu Dalia Allouss Maryam El Hajam Source Type: research
Advances and future perspectives of water defluoridation by adsorption technology: A review
Environ Res. 2024 Apr 2;252(Pt 1):118857. doi: 10.1016/j.envres.2024.118857. Online ahead of print.ABSTRACTFluoride contamination in water sources poses a significant challenge to human health and the environment. In recent years, adsorption technology has emerged as a promising approach for water defluoridation due to its efficiency and cost-effectiveness. This review article comprehensively explores the advances in water defluoridation through adsorption processes. Various adsorbents, including natural and synthetic materials, have been investigated for their efficacy in removing fluoride ions from water. The mechanisms ...
Source: Environmental Research - April 3, 2024 Category: Environmental Health Authors: Noureddine El Messaoudi Dison Stracke Pfingsten Franco Sylwia Gubernat Jordana Georgin Zeynep Mine Şenol Zeynep Ci ğeroğlu Dalia Allouss Maryam El Hajam Source Type: research
Memory effect in ferroelectric polyvinylidene fluoride (PVDF) films via spin crossover probes
Dalton Trans., 2024, Accepted Manuscript DOI: 10.1039/D4DT00220B, PaperYongsung Koo, Jose Galan-Mascaros Ferroelectric polymers are of great interest due to their intrinsic processing capabilities, superior to classic inorganic ferroelectric materials. For example, polyvinylidene fluoride (PVDF) and derivatives have been incorporated into multiple... The content of this RSS Feed (c) The Royal Society of Chemistry (Source: RSC - Dalton Trans. latest articles)
Source: RSC - Dalton Trans. latest articles - April 2, 2024 Category: Chemistry Authors: Yongsung Koo Source Type: research
Application of Fenton chemistry in electrochemical determination of pyrophosphatase activity and fluoride
Talanta. 2024 Mar 31;274:125943. doi: 10.1016/j.talanta.2024.125943. Online ahead of print.ABSTRACTFenton chemistry has aroused widespread concern due to its application in the green oxidation and mineralization of organic wastes. Inorganic pyrophosphatase (PPase) catalyzes the hydrolysis of pyrophosphate ions (PPi) and provides a thermodynamic driving force for many biosynthetic reactions. Fluoride (F-) is widely applied to fight against tooth decay and reduce cavities. The electrochemical determination of PPase activity and F- was realized based on Fenton chemistry in this work. Glassy carbon electrode modified with poly...
Source: Talanta - April 2, 2024 Category: Chemistry Authors: Peng Luo Yiyan Xie Xianhuan He Yiyu He Xuan Wang Liang Tan Source Type: research
