BMC PLANT BIOLOGY
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2024
·Vol. 24
·期 1
·1-14
·
IF 4.3
Dai Jingcheng,Wen Dingxin,Li Hao,Yang Jingpeng,Rao Xiongfei,Yang Yong,Yang Jiangke,Yang Chunlei,Yu Jun
Background Hydrogen sulfide (H 2 S) is a novel signaling molecule involved in the growth and development of plants and their response to stress. However, the involvement of H 2 S in promoting the growth and development of tobacco plants is still unclear. Results In this study, we explored the effect of pre-soaking or irrigating the roots of tobacco plants with 0.0, 2.0, 4.0, 6.0, and 8.0 mM of sodium hydrosulfide (NaHS) on endogenous H 2 S production, antioxidant enzymatic and cysteine desulfhydrase activities, seed germination, agronomic traits, photosynthetic pigments contents, and root vigor. The results revealed that exogenous NaHS treatment could significantly promote endogenous H 2 S production by inducing gene expression of D/L-CD and the activities of D/L-CD enzymes. Additionally, a significant increase in the agronomic traits and the contents of photosynthetic pigments, and no significant difference in carotenoid content among tobacco plants treated with 0.0 to 8.0 mM of NaHS was observed. Additionally, a significant increase in the germination speed, dry weight, and vigor of tobacco seeds, whereas no significant effect on the percentage of seed germination was observed on NaHS treatment. Furthermore, NaHS treatment could significantly increase the activity of superoxide dismutase (SOD) and peroxidase (POD) enzymes, which reduces damage due to oxidative stress by maintaining reactive oxygen species homeostasis. Conclusions These results would aid in enhancing our understanding of the involvement of H 2 S, a novel signaling molecule to promote the growth and development of tobacco plants.
研究领域:
植物学
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植物生理学
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分子生物学
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农学
✓ 已验证
DOI
高影响因子
IONICS
·
2023
·Vol. 29
·期 7
·2911-2923
·
IF 2.8
Zhang Hao,Li Yudong,Han Enshan,Chen Gaojun,Zhang Ziqiang,Yan Caihong,He Yanzhen
The low electrical conductivity of nickel–cobalt layered oxides and single Ni, Co metal oxides led to the low rate capability and poor cycling stability, which thus limits the commercial application in practical supercapacitor. Here, NiCoO 2 /WCC composite electrode materials were prepared by employing wood chips carbon (WCC) with the high specific surface area and low cost as the conductive layer, where hierarchical spherical structure of laminar NiCoO 2 interspersed as homogeneous and was oriented and constructed on the surface of carbon by hydrothermal and calcination. The strategy provided abundant frameworks and active sites for the in situ growth of NiCoO 2 , which prevented the aggregation of spherical structures to a certain extent; furthermore, the layered spherical structure exposed more active sites, which thus enhanced the electrochemical performance of the capacitor. The NiCoO 2 /WCC electrode ( R Ni:Co = 1) possessed a high specific capacitance of 1053.6 F g −1 at 0.5 A g −1 due to the synergistic effect between the bimetallic oxide and WCC, and the specific capacitance of the electrode remained 906 F g −1 even at a high current density of 10 A g −1 by the lamellar structure with more electrochemical sites. In addition, the asymmetric supercapacitor based on the NiCoO 2 /WCC cathode and the WCC anode delivers a high specific capacitance of 134.4 F g −1 at 1 A g −1 , a high specific energy of 36.6 Wh kg −1 at 1 A g −1 , and good cycling performance (~ 94.3% retention after 5000 cycles), where the above properties were superior to existing and similar electrode materials.
研究领域:
材料科学
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电化学
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纳米技术
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储能
✓ 已验证
DOI
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2024
·Vol. 31
·期 16
·23822-23838
·
IF 0
Yu Heng,Zhang Hongliang,Zhang Chenyang,Sun Wei,Han Mingjun,Wang Rong,Wei Xin,Li Songjiang
The rapid development of industrial society is also accompanied by the generation of a large amount of heavy metal wastewater, which has caused serious harm to the ecological environment and human society. Natural sphalerite has an important value in the environmental field due to its own semiconducting properties. In order to effectively remove Ag + from wastewater containing silver, this study develops a natural mineral-based Ag + adsorbent material (sphalerite) based on elemental affinity qualities and mineralization principles. The results of batch experiments showed that the initial Ag + concentration of 50 mg/L reduced to 0.094 mg/L with a reaction duration of 15 min, a sphalerite dose of 5 g/L, an initial particle size of −400 mesh (38 μm), a reaction temperature of 25 °C, and a pH of 5. The highest adsorption capacity is 19.77 mg/g, and the adsorption behavior is consistent with the Freundlich isotherm model and pseudo-second-order adsorption kinetics. The results of solution chemical analysis indicate that the presence of Ag + is primarily influenced by the presence of S 2− . Further analysis using SEM-EDS, FTIR, and XPS techniques reveals that Ag + is chemically adsorb onto the mineral surface, resulting in the formation of Ag 2 S. DFT calculations further confirm the overlap between the Ag 4d orbitals and the S 3p orbitals on the surface of sphalerite, further confirming its chemical adsorption. Mulliken populations suggest that charge transfer occurs between Ag + and S atoms in the sphalerite surface. This research systematically reveals the Ag + adsorption mechanism on sphalerite surface and expands research ideas for treating heavy metal wastewater.
研究领域:
环境科学
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材料科学
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化学工程
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物理化学
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计算化学
✓ 已验证
DOI
WATER AIR AND SOIL POLLUTION
·
2024
·Vol. 235
·期 1
·1-13
·
IF 3.8
Wang Degui,Xiao Qiuying,Xiao Yepeng,Cheng Lihua,Chen Hong,Chen Bing,Wang Suhua
Since lead is a non-biodegradable and neurotoxic heavy metal, efficient removal of Pb(II) from water is of great significance. Herein, a new type of functional cellulose with enriched thiourea groups (Thiourea-PC) was synthesized using the leaves of plumeria frangipani, a common agricultural solid waste, as the starting materials and applied for the efficient removal of lead ions from water. The properties of the cellulose-based adsorbent have been carefully analyzed and evaluated using FT-IR, SEM, XPS, and elemental analysis techniques. The results showed that the maximum adsorption capacity of Thiourea-PC was 173.92 mg/g under the optimal conditions. The adsorption mechanism was attributed to the complex reaction between Pb(II) and mercaptan/nitrogen-containing groups, and the adsorption process conformed to Langmuir isothermal adsorption model and Pseudo-second-order kinetic model. It is worth noting that after five cycles of adsorption–desorption, the removal rate of Pb(II) by Thiourea-pc was still high, reaching more than 97%, and it had been successfully applied to the simulated adsorption of actual water samples with excellent selectivity. Adsorbent precursors come from a wide range of sources, are economical and effective, and the resource utilization of biomass waste can be realized through sustainable synthesis.
研究领域:
环境科学
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材料科学
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化学工程
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水处理技术
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吸附
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重金属去除
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生物质利用
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2024
·Vol. 35
·期 1
·1-12
·
IF 2.8
Lu Xi,Meng Yanshuang,Wang Xin,Xiao Mingjun,Xu Yishan,Zhu Fuliang
Uniformly distributed NiCo 2 S 4 nanoparticles on hollow carbon spheres were prepared by carbonisation and in-situ vulcanisation methods as a positive electrode host for lithium–sulphur batteries. Among them, carbon hollow spheres can provide a huge internal cavity, which prevents volume expansion during the charge and discharge process. At the same time, the physically limit the dissolution of polysulfides in the electrolyte and can also provide high conductivity. The NiCo 2 S 4 nanoparticles on the surface can establish a specific polar environment for charge and discharge and can interact with polysulfides to mitigate the loss of active materials through chemical adsorption. Under the synergistic effect of NiCo 2 S 4 and carbon hollow spheres, the electrode with a special structure of NiCo 2 S 4 /carbon hollow spheres as sulfur host exhibits excellent long cycle performance. At a current density of 335 mA g −1 , it still has a high discharge specific capacity of 526 mAh g −1 after 500 cycles.
研究领域:
材料科学
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电化学
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储能
✓ 已验证
DOI
高影响因子
MOLECULAR DIVERSITY
·
2024
·Vol. 28
·期 6
·3713-3737
·
IF 3.9
Zhang Minjie,Chen Guifen,Chen Yafang,Sui Yi,Zhang Yan,Yang Wude,Yu Xiang
In order to develop new natural product-based anticancer agents, a series of 1,3,4-oxadiazole analogues based on petiolide A were prepared and evaluated for their anticancer activities by MTT method. The structures of all analogues were characterized by various spectral analyses, and B9 was further confirmed by X-ray crystallography. Among all the synthesized compounds, B1 displayed the most promising growth inhibitory effect on colon cancer cells (HCT116) with the IC 50 value of 8.53 μM. Flow cytometric analysis exhibited that B1 arrested the cell cycle at G2 phase and induced apoptosis. Additionally, network pharmacology analysis calculated that B1 might target several key proteins, including AKT serine/threonine kinase 1 (AKT1), SRC proto-oncogene, non-receptor tyrosine kinase (SRC) and epidermal growth factor receptor (EGFR). Furthermore, molecular docking study indicated that B1 had potentially high binding affinity to these three target proteins. Given these results, analogue B1 could be deeply developed as potential anticancer agents.
研究领域:
药物化学
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药理学
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肿瘤学
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化学生物学
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结构生物学
✓ 已验证
DOI
高影响因子
RARE METALS
·
2024
·Vol. 43
·期 4
·1747-1757
·
IF 9.6
Jiang Ming-Ji,Zhang Ya-Na,Meng Ling-Shen,Kang Jing,Li Yong-Jun,Dong Alideertu
Based on the in-situ self-reduction and chemical stability, graphdiyne (GDY) and graphdiyne oxide (GDYO) are used as trapping agents to investigate the ability for recovering Au 3+ , Ag + , and Pd 2+ under different pH values and interfering ions. Under strong acidity at pH = 1, these two agents demonstrate high select recovery towards the three precious metal ions, which could be in-situ reduced to nanoparticles (NPs). In addition, superparamagnetic Fe 3 O 4 NPs are deposited on the surfaces of GDY and GDYO. The magnetic responses enable GDY-Fe 3 O 4 to recover precious metals conveniently and efficiently by the aid of an external magnetic field. This study also confirms the antibacterial activity of the as-recovered NPs deposited on GDY and GDYO against Escherichia coli and Staphylococcus aureus (1 × 10 5 colony-forming unit (CFU)·ml −1 ) , and the antibacterial rates are 100%. This strategy of recovering precious metals and subsequently reusing to combat pathogens will be of great significance for environmental remediation and biomedical applications. Graphical abstract
研究领域:
材料科学
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环境修复
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纳米技术
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生物医学应用
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化学工程
✓ 已验证
DOI
高影响因子
Journal of the Australian Ceramic Society
·
2019
·Vol. 56
·期 2
·745-749
·
IF 0.692
Zhang Daixiong,Xiang Qing,Wang Xia,Guo Xiaogang,Li Xueming
Co 3 O 4 coating is one of most studied transition metal oxide due to its wide application in many fields such as gas sensors, electrochromic thin films, supercapacitors, and solar selective absorber. Aqueous electrophoretic deposition (EPD), which is considered as a cost-effective and environment-friendly coating technology, was successfully employed in preparing nano-Co 3 O 4 coating in this study. For the EPD process with the solid loading of 1 g L −1 , 2.0 mM nitric acid was employed as suitable additive and 5 V was employed as deposition voltage. The prepared nano-Co 3 O 4 coating exhibited good film characteristics, which was proved by scanning electron microscopy (SEM) technology. The result suggests that a rapid preparation of nano-Co 3 O 4 coating in aqueous dispersion system can be easily accomplished. Moreover, the optimum concentrations of the added nitric acid would increase with the solid loading of Co 3 O 4 nanoparticle, but the growth rate of the former was obviously lower than that of the latter.
研究领域:
材料科学
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纳米技术
·
环境工程
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表面工程
·
能源材料
✓ 已验证
DOI
高影响因子
International Journal of Health Geographics
·
2023
·Vol. 22
·期 1
·1-19
·
IF 4.9
Grover Elise N.,Allshouse William B.,Lund Andrea J.,Liu Yang,Paull Sara H.,James Katherine A.,Crooks James L.,Carlton Elizabeth J.
Background Although the presence of intermediate snails is a necessary condition for local schistosomiasis transmission to occur, using them as surveillance targets in areas approaching elimination is challenging because the patchy and dynamic quality of snail host habitats makes collecting and testing snails labor-intensive. Meanwhile, geospatial analyses that rely on remotely sensed data are becoming popular tools for identifying environmental conditions that contribute to pathogen emergence and persistence. Methods In this study, we assessed whether open-source environmental data can be used to predict the presence of human Schistosoma japonicum infections among households with a similar or improved degree of accuracy compared to prediction models developed using data from comprehensive snail surveys. To do this, we used infection data collected from rural communities in Southwestern China in 2016 to develop and compare the predictive performance of two Random Forest machine learning models: one built using snail survey data, and one using open-source environmental data. Results The environmental data models outperformed the snail data models in predicting household S. japonicum infection with an estimated accuracy and Cohen’s kappa value of 0.89 and 0.49, respectively, in the environmental model, compared to an accuracy and kappa of 0.86 and 0.37 for the snail model. The Normalized Difference in Water Index (an indicator of surface water presence) within half to one kilometer of the home and the distance from the home to the nearest road were among the top performing predictors in our final model. Homes were more likely to have infected residents if they were further from roads, or nearer to waterways. Conclusion Our results suggest that in low-transmission environments, leveraging open-source environmental data can yield more accurate identification of pockets of human infection than using snail surveys. Furthermore, the variable importance measures from our models point to aspects of the local environment that may indicate increased risk of schistosomiasis. For example, households were more likely to have infected residents if they were further from roads or were surrounded by more surface water, highlighting areas to target in future surveillance and control efforts.
研究领域:
寄生虫学
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公共卫生
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流行病学
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地理信息系统
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疾病监测
✓ 已验证
DOI
高影响因子
MEDICINAL CHEMISTRY RESEARCH
·
2019
·Vol. 28
·期 8
·1212-1222
·
IF 1.72
Sheng Li-xin,Huang Jia-yan,Liu Chun-mei,Zhang Ju-zheng,Cheng Ke-guang
A total of 25 targeted hydrogen sulfide donor–pentacyclic triterpene hybrids were designed, synthesized and evaluated on the basis of inspiring reports about hydrogen sulfide donor molecules and oleanolic acid derivatives on anti-tumor activity. The results revealed that only some hybrids ( 10a , 10b , 12a , 12b , 13a , and 15b ) showed moderate anti-proliferation activity against K562 cell line. It indicated that oleanane-type, ( R )-lipoic acid and TBZ groups were much more favorable to the anti-proliferation activity. Furthermore, C-3 OH was more beneficial than C-28/29 COOH in the oleanane-type to the antitumor activity of the batch of ( R )-lipoic acid derivatives. And among them, only compound 13a exhibited moderate anti-proliferation activity against both K562 and K562/ADR cell lines, while it exhibited no anti-proliferation activity against BEL-7402 and L-O2 cell lines. Therefore, it suggested that it was not suitable for hybridization of hydrogen sulfide donors attached to oleanolic acid, ursolic acid and glycyrrhetinic acid in the field of anti-tumor.
研究领域:
药物化学
·
肿瘤学
·
分子生物学
·
药理学
·
天然产物化学
✓ 已验证
DOI
高影响因子
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
·
2021
·Vol. 99
·期 2
·420-429
·
IF 2.326
Shen Qiuwan,Jiang Yuhang,Li Shian,Yang Guogang,Zhang Hongpeng,Zhang Zhonggang,Pan Xinxiang
Achieving efficient and stable hydrogen production has always been the focus of the industry, and ethanol steam reforming (ESR) is one of the most reliable, recyclable, and cheap technologies. Perovskite nanocomposite catalysts LaNi x Co 1 − x O 3− δ ( x = 0, 0.5, 0.9) have been prepared by an EDTA-citric acid complexing sol–gel method and used for hydrogen production by ESR. A scanning electron microscopy (SEM), X‐ray diffraction (XRD), EDS and BET were used to characterize the crystal structure of the fresh and the reduced LaNi 0.5 Co 0.5 O 3− δ . The optimal operating parameters of ESR experiments by Ni-doped LaNi x Co 1 − x O 3− δ perovskites were evaluated in detail. Results indicate that the optimum conditions for ESR are as below: reforming temperature is 600 °C; the molar ratio of H 2 O/C 2 H 5 OH is 5:1. In addition, the stable performance of LaNi 0.5 Co 0.5 O 3− δ under the optimal operating condition was examined. Under the optimal reaction conditions, ethanol conversion of LaNi 0.5 Co 0.5 O 3− δ perovskite as an ESR catalyst can reach the highest 90.2%. The results show that LaNi 0.5 Co 0.5 O 3− δ has excellent stability and catalytic activity.
研究领域:
能源化学
·
催化科学
·
材料工程
✓ 已验证
DOI
高影响因子
JOURNAL OF ELECTRONIC MATERIALS
·
2020
·Vol. 49
·期 9
·5422-5429
·
IF 1.774
Li Hui,Tong Hua,Zhang Jiefeng,Li Guoqing,Yang Yunxia,Liu Cui,Li Hongbo,Yuan Xiao
Attempts to improve the application performance of noncontact silver (Ag) screen-printing paste for crystalline silicon solar cells, especially in terms of solderability, depend heavily on controlling the properties of the glass additive therein. Taking PbO–B 2 O 3 –SiO 2 – R x O y glasses as an example, this work demonstrates an improvement in the Ag paste due to the R x O y (e.g., ZnO, Bi 2 O 3 , Al 2 O 3 , and MgO) component. The R x O y components were found to help improve the sintering compactness of the Ag paste. The inclusion of the different R x O y components resulted in obvious differences in the soldering state of the sintered Ag grid. Microscopic observations revealed that the soldering state was related to the covering of the solder on the Ag grid and the growth rate of the intermetallic compound Ag 3 Sn during soldering. Comparatively, the sintered Ag grid was soldered more firmly when the glass containing the Bi 2 O 3 or Al 2 O 3 component was used in the Ag paste. This is due to the higher coverage of solder on these Ag grids and the appropriate growth rate of Ag 3 Sn. Considering these findings, the functions of the R x O y components are discussed comprehensively.
研究领域:
材料科学
·
新能源技术
·
电子器件
·
无机非金属材料
·
光伏技术
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）