Environmental Earth Sciences
·
2023
·Vol. 82
·期 2
·1-15
·
IF 2.8
Guo Dongdong,Wan Yong,Li Jiangshan,Liu Ruiqi,Liu Lei,Xue Qiang
Modified bentonites for the anti-seepage system have been attracting global attention. At the same time, the performances of modified bentonite containing retardation barrier exposed to organic–heavy metal pollutants have not been fully reported. In this study, the adsorption performances (one of the key evaluation indicators of retardation barrier) of nine kinds of commonly used modified bentonites on multiple contaminants were comparatively investigated. The x-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR) analyses were also performed to unravel the adsorption mechanisms. Results show that the adsorption of modified bentonites on phenol and Pb(II) follows the order of SB-16 > PVA > CTAB > APAM > CTAB + PAC > PAC > CPAM > CTAB + PAC > CTAB + CPAM + APAM. Among all the samples, the bentonite modified with SB-16 showed the highest adsorption capacities for phenol and Pb(II). The surfactant molecules inserted in the interlayer space of montmorillonite increase the substrate spacing, which changes the structural properties of the bentonite from hydrophilic to hydrophobic and increases the adsorption of organic contaminants. On the other hand, the polymer has functional groups such as hydroxyl and carboxyl that can form a spatial three-dimensional cross-linking structure on the bentonite surface, providing more adsorption sites for heavy metal ions. These findings indicate the potential industrial applications of modified bentonite in a contaminant barrier system.
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Clinical & Translational Oncology
·
2023
·Vol. 25
·期 6
·1629-1640
·
IF 3.4
Zhang Yi-Dan,Zhong Rui,Liu Jin-Quan,Sun Zhen-Xuan,Wang Teng,Liu Jin-Tao
Purpose Breast cancer is one of the leading causes of tumor death worldwide in female, and the five-year overall survival of breast cancer patients remains poor. It is an urgent need to seek novel target for its treatment. Synaptotagmin 13 (SYT13) is a synaptic vesicle transporting protein that regulates the malignant phenotypes of various cancers. However, its role in breast cancer is still unclear. The current study aimed to investigate the effects of SYT13 on the progression of breast cancer. Methods Twenty-five pairs of breast cancer tissues and non-tumor tissues were obtained to assess the expression of SYT13. We manually modified the expression of SYT13 in MCF-7 and MDA-MB-231 cells. CCK-8 assay, EdU staining, and cell cycle analysis were carried out to measure the proliferated ability of cells. Annexin V/PI and TUNEL assays were used to detect the apoptotic ability of cells. Wound healing and transwell assays were employed to evaluate the migrated and invasive ability of breast cancer cells. Results The results revealed that the mRNA and protein levels of SYT13 were higher in breast cancer tissues and cell lines. Knockdown of SYT13 inhibited the cell proliferation and induced cell cycle arrest in G1 phase of MCF-7 cells by downregulating cyclin D1 and CDK4, as well as upregulating p21. The migration and invasion of MCF-7 cells were repressed by the loss of SYT13 via the gain of E-cadherin and the loss of vimentin. Overexpression of SYT13 in MDA-MB-231 cells led to the opposite effects. Silencing of SYT13 induced the apoptosis ability of MCF-7 cells by the upregulation of bax and the downregulation of bcl-2. Moreover, we found that SYT13 depletion suppressed the FAK/AKT signaling pathway. PF573228 (a FAK inhibitor) and MK2206 (an AKT inhibitor) reversed the SYT13 overexpression-induced promotion of proliferation, migration, and invasion of MDA-MB-231 cells. Conclusion The results indicated that SYT13 promoted the malignant phenotypes of breast cancer cells by the activation of FAK/AKT signaling pathway.
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PubMed
高影响因子
KOREAN JOURNAL OF CHEMICAL ENGINEERING
·
2023
·Vol. 40
·期 5
·1086-1093
·
IF 2.7
Wei Sufeng,Xu Zhengzheng,Liu Yan,Liang Yunhong,Wang Guoyong
Inspired by the conformation of spider silks, fibers with multiscale spindle-knotted structures were fabricated via a one-step modified coaxial electrospinning method. Under a high-voltage electric field, hydrophobic silica polystyrene (PS) fibers coated poly (methyl methacrylate) (PMMA) fibers were integrated together during the electrospinning process. Due to the addition of hydrophobic gaseous SiO 2 combining the spindle structure, a superhydrophobic fibrous membrane was prepared, and the bioinspired fibers achieved a superhydrophobic/superoleophilic performance for efficient emulsion separation. The results demonstrate that the incorporation of PS and SiO 2 improved the efficiency of emulsion separation of the fabricated fibrous membranes by optimizing microstructure and wettability: Specifically, an extraordinary water contact angle under oil (162°) and a satisfied oil contact angle under water (0°). For water-in-diesel emulsions, a high separation efficiency of 99.1% was obtained for membrane with PS addition of 4 wt%, which is greater than of pure PVDF membrane with SiO 2 (75.5%). It performs better than most other membranes showing strong promise in grease purification and oily wastewater treatment.
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Journal of Food Measurement and Characterization
·
2023
·Vol. 17
·期 3
·2978-2987
·
IF 3.4
Zhang Lin,Dong Yi,Lu Yunhao,Mo Rui,He Qiang
The photolysis of colchicine under ultraviolet and visible light irradiation was studied by ultraviolet (UV) scanning and HPLC-MS. The photoproduct was proposed and the cytotoxicity change before and after irradiation was investigated. Results showed that both ultraviolet and visible light irradiation could effectively degrade colchicine into deacetamido-lumicolchicine. The process conformed to first-order kinetics, in which a high degradation rate (K = 0.5862 h − 1 ) was observed when colchicine was dissolved in ethanol and irradiated by UV light. Cell viability and cell cycle studies proved that a photolysis treatment of colchicine could weaken the cytotoxicity effectively. Colchicine inhibited the division of BRL 3 A cells in G2/M phase with an IC 50 value of 0.48 µg/mL, while the toxic effect could be reduced significantly with IC 50 2.1 µg/mL when colchicine was exposed to UV irradiation. Results are beneficial to the toxicity elimination of colchicine in the processing of daylily flower in food industry, and can also provide photochemistry reference for colchicine-related studies.
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JOURNAL OF NANOBIOTECHNOLOGY
·
2023
·Vol. 21
·期 1
·1-15
·
IF 10.2
Wang Shuqi,Zhou Li,Tian Hailong,Li Bowen,Su Miao,Li Qiong,Nice Edouard C.,Huang Canhua,Shao Jichun,He Tao
Background Colorectal cancer (CRC) is a common malignancy with the second highest mortality and the third highest morbidity worldwide. However, the overall survival of patients is unsatisfactory, thus requiring more effective clinical strategies. Celastrol (CLT), a natural bioactive compound, has been reported to induce reactive oxygen species (ROS)-mediated apoptosis to exhibit significant antitumor effects against CRC. However, the poor water solubility, low targeting ability, and bioavailability of CLT have limited its application, and CLT-induced protective autophagy weakens its therapeutic efficiency.Results We designed a targeted chemo-phototherapy nanoplatform (HCR NPs) to improve the application of CLT. The codelivery of IR820 and CLT in HCR NPs solved the water-soluble problem of CLT and enhanced apoptosis via IR820-mediated hyperthermia. In addition, hydroxychloroquine (HCQ) conjugated to hyaluronic acid (HA) not only increased the active targeting of HCR NPs but also inhibited CLT-induced protective autophagy to exacerbate apoptosis, thus achieving an amplified antitumor effect. Importantly, the HCR NPs exhibited an excellent therapeutic effect on CRC both in vitro and in vivo.Conclusion The HCR NPs presented in this study may not merely provide a new reference for the clinical application of CLT but also result in an attractive strategy for CRC treatment.
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PubMed
高影响因子
European Journal of Wood and Wood Products
·
2022
·Vol. 81
·期 3
·685-697
·
IF 2.528
Huang Dan,Wang Jing,Li Fanghua,Xie Min,Qu Qingli,Wang Yimin,Sun Wenjuan,Wu Caie,Xu Wenhui,Xiong Ranhua,Ding Yichun,Yang Anquan,Huang Chaobo
In this study, for the first time, optimized phenolic compounds and antioxidant properties were derived from the extraction process of Cortex fraxini (CFR) using response surface methodology. Four factors and three levels of Box-Behnken (BBD) were used to study the extraction time (X 1 ), extraction temperature (X 2 ), ethanol concentration (X 3 ), and solvent-material ratio (X 4 ). The analysis of variance (ANOVA) revealed that temperature and solvent-material ratio had a relatively large effect on the response. The optimal combination of phenolic compounds and antioxidant activity was obtained with the optimal conditions of X 1 = 1.629 h, X 2 = 53.367 ℃, X 3 = 60.971% (v/v), and X 4 = 45.582 mL/g under ultrasonic assisted extraction (UAE). The experimental parameters were consistent with the predicted values. Caffeic acid, erucic acid, ferulic acid and p-hydroxycinnamic acid and other 19 phenolic acids were characterized by high performance liquid chromatography-mass spectrometry (HPLC–MS). The results of this study indicate that optimization of the extraction process is essential for the accurately determined measurement of phenolic components and antioxidants in CFR for its industrial applications.
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TRANSACTIONS OF TIANJIN UNIVERSITY
·
2022
·Vol. 29
·期 2
·110-119
·
IF 0
Zhang Zongping,Xu Jie,Zhang Dongmei,Ma Huijuan,Li Tao,Xiao Ting,Pei Cunyuan,Ni Shibing
The safe operating voltage and low volume variation of Li 3 VO 4 (LVO) make it an ideal anode material for lithium (Li)-ion batteries. However, the insufficient understanding of the inner storage mechanism hinders the design of LVO-based electrodes. Herein, we investigate, for the first time, the Li-ion storage activity in LVO via Cl doping. Moreover, N-doped C coating was simultaneously achieved in the Cl doping process, resulting in synergistically improved reaction kinetics. As a result, the as-prepared Cl-doped Li 3 VO 4 coated with N-doped C (Cl-LVO@NC) electrodes deliver a discharge capacity of 884.1 mAh/g after 200 cycles at 0.2 A/g, which is the highest among all of the LVO-based electrodes. The Cl-LVO@NC electrodes also exhibit high-capacity retention of 331.1 mAh/g at 8.0 A/g and full capacity recovery after 5 periods of rate testing over 400 cycles. After 5000 cycles at 4.0 A/g, the discharge capacity can be maintained at 423.2 mAh/g, which is superior to most LVO-based electrodes. The Li-ion storage activity in LVO via Cl doping and significant improvement in the high-rate Li-ion storage reported in this work can be used as references for the design of advanced LVO-based electrodes for high-power applications.
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CELLULOSE
·
2022
·Vol. 30
·期 2
·1193-1204
·
IF 6.123
Ma Hongliang,Liu Zhuqing,Lou Jiang,Ding Qijun,Jiang Yifei,Li Xia,Han Wenjia
As a human-computer interaction technology for the Internet of Things (IoT), non-contact humidity sensors have been widely explored. However, traditional humidity sensors have become a bottleneck in the development of flexible electronics owing to their complex processes and non-degradability. Here, bacterial cellulose (BC) and MWCNT were sequentially coated on paper to construct a durable and highly sensitive bacterial cellulose/MWCNT humidity sensor (BCNT). The BC endows the paper substrate with dense structure and significantly reduces the consumption of active materials (6.7 times reduction). Further, the well-dispersed CNT coating forms an interlocking structure with the BC nano-network, which results in a high mechanical strength (66.3 MPa). The maximum response of BCNT02 can be up to 94.5% (− ΔI/I 0 ) under 98% RH, and the response and recovery times were 150 and 297 s, respectively. Moreover, the high humidity sensitivity of the BCNT make it an excellent choice for research and development of humidity sensors for respiration detection, non-contact switching and humidity localization.
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Scientific Reports
·
2022
·Vol. 12
·期 1
·1-13
·
IF 4.996
Luo Meng,Lin Juntao,Zhou Xinhua,Pu Xia
This study provides a promising controlled release form of nuclear polyhedrosis virus (NPV) for targeted control of lepidopteran pests. However, the application of NPV is limited due to its sensitivity to UV inactivation. This study investigated the anti-UV properties of microcapsules of SeMNPV occlusion bodies (OBs) encapsulated by calcium alginate (CA), and also the influence of the modification of CA by chitosan (CS), whey protein (WP), and polydopamine (PDA). These capsules were used to deliver, in a controlled release manner virions under alkaline pH conditions. Characterization of the structure, morphology, particle size, encapsulation efficiency, contact angle, insecticidal activity, UV resistance and in vitro release of the microcapsules was conducted. The modified microcapsules had better sphericity, and were devoid of SeMNPV OBs on the surface. The encapsulation rate was 84.76 ± 0.59%. PDA@CA-NPV had the highest wettability and the contact angle was 74.51 ± 0.53°. The 50% lethal concentration values (LC 50 ) of CA-NPV, CS@CA-NPV, WP@CA-NPV and PDA@CA-NPV were 11.5, 10.7, 10.5 and 1.2 times that of SeMNPV OBs alone. The modified microcapsules all improved the anti-UV performance of the virus, and PDA@CA-NPV was the most UV-resistant. Using qPCR, it was observed that under alkaline conditions, a large number of virions were released from PDA@CA-NPV, CA-NPV and SeMNPV OBs. Microencapsulated virus under alkaline conditions did not change the release pattern of virions.
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Biotechnology for Biofuels and Bioproducts
·
2022
·Vol. 15
·期 1
·1-12
·
IF 0
Hu Yueli,Zhang Chen,Zou Lihua,Zheng Zhaojuan,Ouyang Jia
Background The conversion of lignin-derived aromatic monomers into valuable chemicals has promising potential to improve the economic competitiveness of biomass biorefineries. Pinosylvin is an attractive pharmaceutical with multiple promising biological activities. Results Herein, Escherichia coli was engineered to convert the lignin-derived standard model monomer cinnamic acid into pinosylvin by introducing two novel enzymes from the wood plant: stilbene synthase from Pinus pinea (PpSTS) and 4-Coumarate-CoA ligase from Populus trichocarpa (Ptr4CL4) . The expression of Ptr4CL4 drastically improved the production of pinosylvin (42.5 ± 1.1 mg/L), achieving values 15.7-fold higher than that of Ptr4CL5 (another 4-Coumarate-CoA ligase from Populus trichocarpa ) in the absence of cerulenin. By adjusting the expression strategy, the optimized engineered strain produced pinosylvin at 153.7 ± 2.2 mg/L with an extremely high yield of 1.20 ± 0.02 mg/mg cinnamic acid in the presence of cerulenin, which is 83.9% ± 1.17 of the theoretical yield. This is the highest reported pinosylvin yield directly from cinnamic acid to date. Conclusion Our work highlights the feasibility of microbial production of pinosylvin from cinnamic acid and paves the way for converting lignin-related aromatics to valuable chemicals.
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PubMed
Food Biophysics
·
2022
·Vol. 18
·期 2
·198-207
·
IF 3.34
Li Ya,Yu Ling,Wang Lifeng,Xiong Wenfei
Frozen storage can greatly improve the shelf life of fresh egg white protein (EWP), but it will also lead to the reduction of protein foaming and can not meet the application needs. Herein, high-intensity ultrasound (HIUS) was used to improve the foam characteristics of EWP in different frozen storage periods. The results showed that compared with fresh egg white, the foaming ability of EWP with different freezing times (0, 3, 7, 14, 21 days) after HIUS treatment (20 kHz, 60% amplitude, 5 min) was significantly improved, especially the EWP after 21 days of frozen storage was doubled by HIUS induction. Furthermore, it was found that the improvement of EWP foamability was mainly due to the enhancement of surface hydrophobicity (H 0 , the value from 263 to 456) and the decrease of apparent viscosity (from 0.506 Pa.s to 0.007 Pa.s), which increased the diffusion rate of protein to the interface (from 0.19 mNm − 1 s − 0.5 to 0.26 mNm − 1 s − 0.5 ) and its adsorption amount (from 35.8 to 43.3%) at the interface. These results showed that HIUS was a simple, efficient and residue free way to improve the foam characteristics of frozen EWP, which has strong promotion and application value.
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JOURNAL OF POLYMER RESEARCH
·
2022
·Vol. 29
·期 11
·1-15
·
IF 3.061
Pang Jinying,Tan Dengfeng,Huang Chunyan,Jiang Tanling,Gao Qifeng,Mo Xianzhong,Zhang Shuhua
Nanocomposites have been demonstrated as potential materials for biosensors to biomedicine applications. However, the crystallization mechanism of nanocomposites has not been thoroughly investigated so far. Cellulose nanofiber is used as a new kind of nano-filler to modify the biodegradable polymer to prepare nanocomposites. Banana cellulose nanofibers/polycaprolactone composite membranes (BNCF/PCL) and banana cellulose nanofibers grafted with polycaprolactone/polycaprolactone composite membranes (BGCL/PCL) were prepared, respectively. To explore the effects of BNCF and BGCL on the crystallization properties of PCL. SEM, POM, and DSC were used to study the crystallization of PCL, BNCF/PCL, and BGCL/PCL films. Mo's method was applied to study the non-isothermal kinetics of BNCF/PCL films, Avarmi and Jeziorny's models successfully predict the non-isothermal kinetics of BGCL/PCL films. The results showed that BNCF promoted the crystallization of BNCF/PCL films. The crystallization peak temperature of BNCF/PCL films was 4.11 ℃ higher than pure PCL, and the crystallinity was 5.34% higher than that of pure PCL. The crystallization peak temperature of the BGCL/PCL films decreased slightly, but the crystallinity increased by 3.78%. The crystal growth modes of BNCF/PCL films and BGCL/PCL films were consistent with the three-dimensional growth of heterogeneous nucleation, BNCF/PCL films with average Avrami index n ranging from 2.7 to 3.9, and the BGCL/PCL films with n ranging from 2.5 to 3.2. Furthermore, the micrographs of polarized optical microscopy (POM) supported the kinetics results. This study makes a deep insight into the effect of cellulose nanofiber on the crystallization of biodegradable aliphatic polyesters.
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