JOURNAL OF CHEMICAL AND ENGINEERING DATA
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2025
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IF 2.1
Jing Li,Linglin Fu,Zongde Ma,Jinniu Chen,Changhao Wu,Nan Zhang,Xudong Yu
To understand the interrelationships within the multi-ion coexisting sulfate system during the solid–liquid transformation of polyhalite in the Bieletan area, phase equilibria of ternary systems M, Ca2+//SO42–-H2O (M = Na+, K+, Mg2+) at 288.2 K were studied by the isothermal dissolution equilibrium method. The solubility and density of the equilibrium liquid phases of the system were measured experimentally, and the composition of the equilibrium solid phase at the ternary invariant point was determined by X-ray powder diffractometry. It is found that the ternary system K+, Ca2+//SO42–-H2O at 288.2 K forms the double salt syngenite (K2SO4·CaSO4·H2O), while the systems Na+, Ca2+//SO42–-H2O and Mg2+, Ca2+//SO42–-H2O at 288.2 K only form with the formation of CaSO4·2H2O and Na2SO4·10H2O (MgSO4·7H2O). Multitemperature comparison of the M, Ca2+//SO42–-H2O (M = Na+, K+, Mg2+) systems shows that the phase diagrams of Mg2+, Ca2+//SO42–-H2O are consistent at the selected temperature, only containing CaSO4·2H2O and MgSO4·nH2O (n = 1, 6, 7). While K+, Ca2+//SO42–-H2O and Na+, Ca2+//SO42–-H2O change from 288.2 and 298.2 to 348.2 K, the phase diagram forms double salt(s) K2SO4·5CaSO4·H2O (Na2SO4·5CaSO4·3H2O and Na2SO4·CaSO4).
研究领域:
化学热力学
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无机化学
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相平衡
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地球化学
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矿物加工
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JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
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2023
·
IF 10.9
Jianmao Zheng,Jiyuan Zuo,Cairong Xiao,Qining Guo,Xiaobin Fu,Chengyun Ning,Peng Yu
The induction of dental pulp stem cells (DPSCs) into odontogenic differentiation is a cutting-edge method of dental pulp regeneration treatment. However, it remains a challenge to develop biomaterials and therapies that can induce odontogenic differentiation. Here, we propose a wireless electrical stimulation strategy to induce DPSCs odontogenic differentiation via K 0.5 Na 0.5 NbO 3 piezoelectric nanoparticles (KNN) and polarized KNN (PKNN), which can be endocytosed by DPSCs. In vitro, several odontogenic differentiation indexes were also increased in DPSCs treated with KNN and PKNN, and the increase was more obvious in the PKNN group. Intracellular wireless electrical field promoted mitochondrial calcium concentration via mitochondrial calcium unidirectional transporter (MCU), increased the production of adenosine triphosphate (ATP), and induced odontogenic differentiation through the activation of the cAMP-PKA signaling pathway. In vivo, dental pulp-like tissue was induced by electrical stimulation wirelessly with KNN and PKNN, which was more clinically friendly compared with the wired device, and the induction was more obvious in the PKNN group consistent with in vitro experiments. In conclusion, this work demonstrates the potential of PKNN as an effective stimulus that can induce odontogenic differentiation of DPSCs and be applied to dental pulp regeneration treatment.
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KOREAN JOURNAL OF CHEMICAL ENGINEERING
·
2022
·Vol. 39
·期 8
·2229-2238
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IF 3.146
He Lei,Dai Yong,Wang Zhe,Yang Lutao,Zhang Luxia,Hu Pengpeng,Tian Yu,Mo Hong,Zhu Haomiao,Zhang Jun
Oilfield wastewater has a significantly negative influence on the recovery efficiency due to its hypersalinity. Therefore, magnetic graphene oxide (GO) modified with ethylene diamine tetraacetic acid (EDTA) and grafted by polyethylene glycol (PEG) nano-adsorbent was prepared to remove the Ca 2+ and Cr 6+ in Jidong Oilfield wastewater specifically. It was noteworthy that PEG- g -EDTA/Fe 3 O 4 /GO nano-adsorbent had excellent adsorption performance, with removal ratios up to 71.6% for Ca 2+ and 42.7% for Cr 6+ at 30 min. After the fifth recycling run, the nano-adsorbent still remained with high removal ratios (69.3% for Ca 2+ and 30.5% for Cr 6+ ) and high reuse rates (89.4% for Ca 2+ and 95.2% for Cr 6+ ), indicating that the nano-adsorbent had outstanding adsorption-desorption efficacy and high reusability. The adsorption test results demonstrated that the total salinity of the treated oilfield wastewater decreased by about 5,000 ppm, and the displacement efficiency further increased by 12.5% by chemical flooding compared with the untreated wastewater. Therefore, PEG- g -EDTA/Fe 3 O 4 /GO nano-adsorbent is an adsorbent with excellent potential which can effectively remove Ca 2+ and Cr 6+ in oilfield wastewater to enhance oil recovery (EOR).
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2023
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IF 8.2
Qianqian Tang,Hao Wu,Mingsong Zhou,Dongjie Yang
Presently, most studies on modified lignin focused on the adsorption to heavy metal cations, but rarely to Ca 2+ in hard water . Therefore, this work prepared a new gel-type lignin-based cationic adsorption resin (E-LSAF) through the crosslinking and curing of alkali lignin grafted by sodium sulfite sulfonated acetone to remove Ca 2+ in water. Under the determined optimum synthesis conditions, E-LSAF with a highest sulfonic group content of 1.99 mmol/g was obtained. Structural and physicochemical measuring results showed E-LSAF was a gel-type resin, owning strong hydrophilicity , high mechanical strength, excellent thermal stability and acid-alkaline resistance. Adsorption results indicated the adsorption of E-LSAF to Ca 2+ was well-fitted by Langmuir model, and the maximum adsorption capacity reached 45.8 mg/g. Pseudo-second-order model can describe this adsorption process well, suggesting it a chemisorption process. Dynamic column adsorption results showed E-LSAF could transform hard water into soft or even very soft water. The regeneration efficiency still maintained 80 % after 5 cycles. The adsorption mechanism was attributed to electrostatic attraction, ion exchange and complexation. This work provided a high-performance lignin-based cationic adsorption material with high adsorption capacity to Ca 2+ and excellent acid-alkaline resistance, which filled the research gap of using modified sulfonated lignin to remove Ca 2+ from water.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2021
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IF 4.539
Khin Nyein Ei San,Tian Niu,Yun Fang,Hong Wang,Ye Fan,Yongmei Xia
Adsorption of fatty acids and soaps on solid surfaces is widely-used to modify solids but easy to be desorbed and forming soap scum in acidic and hard water. The admicelle of sodium conjugated linoleate (ASCL) on nano-CaCO 3 was applied to fabricate stable ASCL@CaCO 3 , via SCL bilayer adsorption followed by simple thermo-curing the conjugated double bonds of SCL within an admicelle to anchor the admicelle around a nano-CaCO 3 core. The structure, morphology, and properties of ASCL@CaCO 3 were characterized by FT-IR, UV, TG, TEM, and contact angle measurements. High internal phase Pickering emulsions of liquid paraffin in water with oil volume fractions up to 80% could be stabilized with 1 wt% of the ASCL@CaCO 3 as particle emulsifier . The stable SCL bilayer on the CaCO 3 surface brings variable surface affinity in response to Ca 2+ /pH/CO 2 triple triggers, endowing the ASCL@CaCO 3 to stabilize high internal phase emulsions, switch on/off Pickering emulsions, and even lead to emulsion inversion. Therefore, the triple stimuli-responsive properties of the ASCL@CaCO 3 can be effectively applied in emulsion preparation–separation and drug delivery systems.
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Materials
·
2020
·Vol. 13
·期 19
·4403
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IF 3.057
Zhen Liu,Xinshu Xia,Wei Li,Liren Xiao,Xiaoli Sun,Fubin Luo,Qinghua Chen,Qingrong Qian
The work reports a novel strategy for combining polymers and metal–organic frameworks (MOFs) into composites for adsorption applications. Calcium silicate (CaSiO3) was introduced into acrylonitrile butadiene styrene/thermoplastic polyurethane (ABS/TPU) alloy, and the CaSiO3/ABS/TPU skeleton was fabricated by 3D printing technology. The Ca-MOF was directly loaded on the surface of acetone-etched 3D skeleton by in-situ growth method. The obtained 3D skeleton was characterized and the performance of methylene blue (MB) adsorption was determined. It is clear that Ca-MOF is successfully loaded on the surface of 3D skeleton due to the presence of CaSiO3. The MB adsorption ratios of the solutions with initial concentrations of 50, 100 and 200 mg/L at the equilibrium time (5 h) are 88%, 88% and 80%, respectively, revealing good MB adsorption performance of the 3D skeleton. The MB adsorption ratio remains 70% at six runs of adsorption–desorption experiment, indicating the excellent recovering property of the skeleton. The results show that the prepared CaSiO3/ABS/TPU 3D skeleton is a candidate adsorbent for printing and dyeing effluent treatment.Keywords:3D printing;metal–organic framework;in-situ growth;adsorption;methylene blue
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NEUROCHEMICAL RESEARCH
·
2021
·Vol. 47
·期 2
·264-278
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IF 3.996
Gao Tianyu,Gao Ce,Liu Zhidong,Wang Yun,Jia Xiaoxia,Tian Hao,Lu Qian,Guo Lin
Further understanding the mechanism for microglia activation is necessary for developing novel anti-inflammatory strategies. Our previous study found that the activation of sigma-1 receptor can effectively inhibit the neuroinflammation, independent of the canonical mechanisms, such as NF-κB, JNK and ERK inflammatory pathways. Thus, it is reasonable that an un-identified, non-canonical pathway contributes to the activation of microglia. In the present study, we found that a sigma-1 receptor agonist of 2-morpholin-4-ylethyl 1-phenylcyclohexane-1-carboxylate (PRE-084) suppressed lipopolysaccharide (LPS) elevated nitric oxide (NO) content in BV-2 microglia culture supernatant and LPS-raised mRNA levels of tumor necrosis factor-α (TNF-α), interleukin-1β (IL-1β), inducible nitric oxide synthase (iNOS) in BV-2 microglia. Moreover, PRE-084 alleviated LPS-increased Ser 9 de-phosphorylation of glycogen synthase kinase-3 beta (GSK-3β), LPS-elevated catalytic activity of calcineurin, and LPS-raised percent and frequency of Ca 2+ oscillatory BV-2 cells. We further found that the inhibitory effect of PRE-084 was reversed by a calcineurin activator of chlorogenic acid and a GSK-3β activator of pyrvinium. Moreover, an IP 3 receptor inhibitor of 2-aminoethoxydiphenyl borate mimicked the anti-inflammatory activity of PRE-084. Thus, we identified a noncanonical pro-neuroinflammary pathway of Ca 2+ oscillation/Calcineurin/GSK-3β and the inhibition of this pathway is necessary for the anti-inflammatory activity of sigma-1 receptor activation.
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JOURNAL OF APPLIED POLYMER SCIENCE
·
2019
·Vol. 136
·期 20
·47539
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IF 2.188
Ruiyang Chen,Shibin Wang,Xin Shen,Feng Zhao,Jianchun Guo
Ca 2+ tolerance of water-soluble polyacrylamide is a key problem in application fields. It is urgent to make the mechanism of between the polyacrylamide and Ca 2+ clear. A terpolymer polyacrylamides including the sulfonate group with different monomer concentrations is synthesized. The effect of the CaCl 2 concentration on the rheological properties is measured by a rheological rheometer. The zeta potential of the copolymer solution is obtained by a zeta potentiometer to learn about the electrical characteristics of the copolymers in solution. The microcosmic shape of the copolymer aqueous solution is investigated by a laser particle analyzer and an environmental scanning electron microscope. The results show that more sulfonate groups on the molecule can enhance the salt tolerance of the polyacrylamide. Sulfonate groups can weaken the effect of Ca 2+ on the copolymer through the formation of complexes, whereas the self-aggregation process of the copolymer cannot be stopped at high Ca 2+ concentrations. This study provides theoretical guidance to elucidate the influencing rules and mechanism of calcium salt on the polyacrylamide containing a sulfonate group, which can be helpful for polyacrylamide modification and can improve the application of polyacrylamide under the condition of higher salt concentration. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019 , 136 , 47539.
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Journal of Materials Chemistry A
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2017
·Vol. 6
·期 4
·1403-1411
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IF 8.867
Junwei Yang,Haian Xie,Hao Chen,Zhuqun Shi,Tao Wu,Quanling Yang,Chuanxi Xiong
Flexible and eco-friendly dielectric materials with high energy density and breakdown strength have promising applications in energy storage devices. Here, cellulose nanofibril/boron nitride nanosheet nanocomposite films were fabricated from 2,2,6,6-tetramethylpiperidine-1-oxyl radical (TEMPO)-oxidized cellulose nanofibrils (TOCNs) and hexagonal boron nitride nanosheets (BNNSs) in aqueous dispersions. The obtained TOCN/BNNS nanocomposites were further cross-linked by immersion in aqueous CaCl2 solution to improve their properties. The maximum discharged energy density of the finally prepared composite film was 3.9 J cm−3 with only 4 vol% of BNNSs at 380 MV m−1, achieving greater enhancement than the neat TOCN film with a low energy density of 0.1 J cm−3 at 50 MV m−1. It is much higher than the previously reported highest energy density of biopolymer-based composites (0.81 J cm−3) and also higher than that of the commercially available best dielectric polymer BOPP (2 J cm−3). Moreover, the nanocomposite films exhibited excellent mechanical flexibility and significantly improved thermal stability (100 °C increase in thermal decomposition temperature).
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iScience
·
2024
·
IF 4.6
Ming-Xin Cao,Zhan-Yin Qian,Yan-Jie Liang,Qi-Yao Liu,Han-Ping Wang,Yang Meng,Yin-Song Wang,Yue Wang
Dental caries is a common disease resulting from tooth demineralization caused by bacterial plaque. Probiotics have shown great potential against caries by regulating the balance of oral flora. However, obstacles such as poor colonization and lysozyme sensitivity in oral cavity hinder their further application. In this study, an efficient layer-by-layer surface coating of tannic acid (TA)-Ca 2+ and casein phosphopeptide (CPP) was applied to the probiotic Bifidobacterium infantis (BI) with potential anti-caries activity. Multi-functionalized probiotics thus prepared (called BI@TA-Ca 2+ @CPP) exhibited similar growth pattern, resistance to lysozyme and enhanced colonization potential. The ability of BI@TA-Ca 2+ @CPP in inhibiting cariogenic biofilm formation was improved. Moreover, BI@TA-Ca 2+ @CPP showed excellent remineralization efficacy. In a caries-induced rat model, BI@TA-Ca 2+ @CPP significantly prevented the occurrence and progression of tooth decay, meanwhile showing good biocompatibility. In summary, this study underlines the importance of probiotics coating in antibiofilm and remineralization activity as a promising strategy against dental caries.
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ACS Applied Nano Materials
·
2024
·
IF 5.3
Yiran Fan,Ziyou Ding,Jia Chen,Chengyu Li,Yingchao Han
Alkaline phosphatase (ALP) is an essential enzyme widely distributed in the human body, and it can hydrolyze pyrophosphate (PPi) under alkaline conditions. Therefore, ALP and PPi activities are associated with many diseases and it is crucial to develop sensitive and selective methods for detecting ALP and PPi. Herein, poly(acrylic acid) (PAA)-Ca2+(Ce3+) nanoclusters fluorescent probe was synthesized aiming to detect PPi and ALP quantitatively. The nanoclusters present monodisperse, and their particle size is 0.9–2.4 nm. The probe exhibits no fluorescence due to electron transfer; whereas it can combine with PPi to yield fluorescence increase, arising from the enhanced electric-dipole transition of Ce3+ under the ligand effect of PPi. Moreover, the probe displays good selectivity to PPi, and the fluorescence changes display a linear relationship with PPi concentration of 3–20 mM (y = 11.29x – 23.47, R2 = 0.994). Furthermore, the probe was mixed with PPi to form PAA-Ca(Ce):PPi nanoparticle (Monodisperse, average size: 1.94 nm) and showed high fluorescence selectivity and responsiveness to ALP due to the ALP hydrolyzing effect and the fluorescence difference between PAA-Ca(Ce):PPi and PAA-Ca(Ce):Pi. Based on the relationship between the fluorescence reduction rate of the probe and the logarithm of ALP concentration (y = 0.0594x – 0.00111, 5–200 U/L, R2 = 0.996), ALP was successfully detected quantitatively, and the detection limit is calculated to be 0.62 U/L. Through this approach, we developed a fluorescence “turn-on” for PPi detection and “turn-off” for ALP detection. This study provides a promising strategy for the diagnosis of diseases related to PPi and ALP.
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PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY
·
2025
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IF 4
Siye Zhou,Jiayun Li,Dongping Chen,Zhixuan Xu,Kudousi Kuerban,Qiang Liu,Muhammad Irfan Waris,Wenwu Wu,Nannan Lv,Jianting Fan
Hyphantria cunea , a globally significant quarantine pest, causes severe ecological and economic impacts in invaded regions. Attractants are environment-friendly and valuable pest management tools for H. cunea control. In this study, we identified that the combination of β-ocimene with sex pheromone components was strongly attractive to H. cunea males. This attractant combination activates the Ras signaling pathway and stimulates Ca 2+ in male adults following exposure. Feeding and oviposition behavior results demonstrated that H. cunea prefers Morus alba over Platanus × acerifolia , Metasequoia glyptostroboides , and Taxodium distichum . In the fresh branches of M. alba with leaves, the relative abundance of β-ocimene (36.33 ± 0.41 %) was significantly higher than the other hosts. Electroantennography recordings, behavioral choice assays, and field trapping trials showed that the combination of β-ocimene with sex pheromone components significantly enhanced male response and attraction. The number of trapped males using β-ocimene/ sex pheromone blend was 3.7-fold higher than that of sex pheromone or β-ocimene alone in the field, indicating a synergistic effect of adding β-ocimene to sex pheromone. The molecular mechanism of β-ocimene/sex pheromone synergism was further analyzed. After exposure to the attractant, the Ras signaling pathway in the heads of males are activated ( HcILP and HcPLCε1 are upregulated, while HcRasGAP and HcPLD are downregulated), which further stimulates the expression of IP3 and Ca 2+ . The activation of Ca 2+ may be the key reason for its higher attraction to males. These findings provide a theoretical basis for the selection and mechanistic understanding of attractants for H. cunea , offering insights for attractant-based pest control strategies.
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