IRANIAN POLYMER JOURNAL
·
2023
·
IF 3.1
Wan Songhan,Chen Songbo,Yang Qingshan,He Xianru
The migration of commercial rubber antioxidants causes significant environmental pollution; thus, environmentally friendly antioxidants are receiving increasing attention in rubber production. Herein, we prepared a green anti-aging composite filler called ZPa via an in situ intercalation polymerization procedure of polydopamine (PDA) on zirconium phosphate ( α -ZrP) for realizing the enhancement of mechanical performance and aging resistance in nitrile butadiene rubber (NBR). Different from commercial antioxidants, the biocompatibility of α -ZrP and PDA made ZPa non-toxic and harmless to the environment. Results showed that PDA increased the interlayer spacing of α -ZrP and promoted its dispersion in matrix. The best reinforcement effect of the composite filler on NBR can be achieved with 5 phr of ZPa. The tensile strength of ZPa/NBR increased by 51% compared to the neat NBR. The outstanding free radical capture capability and the barrier function of ZPa greatly enhanced the ability of NBR to resist aging. The mechanical properties after aging of ZPa-5/NBR were 64% and 21% higher than those of the neat NBR in tensile strength and elongation-at-break values, respectively. The present work also exhibited that ZPa/NBR showed powerful thermal oxidative stability. In brief, ZPa enabled NBR highly competitive for mechanical performance and anti-aging property, which is expected to be utilized in the field of “green” rubber. Graphical Abstract
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL RESEARCH IN CHINESE UNIVERSITIES
·
2023
·
IF 3.1
Xiang Shuang,Guo Yong,Liu Xiaohui,Wang Yanqin
The interface between Au and support has attracted extensive interest because of its unique catalytic ability for hydrogen activation in catalytic hydrogenation/hydrogenolysis reactions. Herein, we create the Au-CoO-O V interface in the 1.0%Au/Co 3 O 4 -Rod-250 catalyst, which could dissociate H 2 via the heterolytic way to yield rich hydride species and achieve excellent catalytic performance in the hydrogenolysis of biomass-derived 5-hydroxymethylfurfural (HMF) to 2,5-dimethylfuran (DMF). The XRD and HRTEM analyses show that Au nanoparticles are uniformly dispersed on CoO-O V surface and in situ DRIFTS spectra show the enhancement of heterolytic dissociation of hydrogen (signals of Au—D and O—D vibration) compared with bare CoO (Co 3 O 4 -Rod-250). This work provides insights for fabricating highly active Au-support catalysts for catalytic hydrogenation/hydrogenolysis reactions.
✓ 已验证
产品关联
DOI
高影响因子
PLANT CELL TISSUE AND ORGAN CULTURE
·
2023
·
IF 3
Zhang Ting,Zhao Yichen
Tea plant ( Camellia sinensis (L.) O. Kuntze) is an important woody economic crop that has been cultivated worldwide. Adversity stress acts as a significant factor affecting the growth and development of tea plants. Brassinazole-resistant (BZR) family protein is an essential factor in regulating plant stress resistance and plays a key role in cold stress response, heat, drought and salt resistances. In this study, the promoter region upstream of CsBZR1-2 was cloned. The promoter sequence and its 5′-end truncated segment were inserted upstream of β-glucuronidase ( GUS ) gene in the pCambia1391Z plasmid. Stably expressed transgenic tobacco lines were obtained by Agrobacterium tumefaciens -mediated genetic transformation. The results showed that except for promoter lacking the core element, both full-length and truncated promoters could initiate the expression of GUS , but the level of expression was affected by the degree of deletion at the 5′-end. The core region of the promoter was in a 311 bp region including the transcription start site (TSS). In addition, the regulatory mechanism of the promoter was explored. It was found that the genes regulated by the promoter were responsive to stress such as cis-acting elements (MeJA, ABRE and LTR), BR and light. This paper provides a theoretical basis to further explore the regulatory mode of the promoter and to achieve efficient gene expression.
✓ 已验证
产品关联
DOI
高影响因子
Nano Research
·
2023
·
IF 9.9
Yue Meng,He Xun,Sun Shengjun,Sun Yuntong,Hamdy Mohamed S.,Benaissa Mhamed,Salih Alsamani A. M.,Liu Jun,Sun Xuping
Developing efficient and durable oxygen evolution reaction (OER) catalysts holds great promise for green hydrogen production via seawater electrolysis, but remains a challenge. Herein, we report a Co-doped Ni 3 S 2 nanosheet array on Ni foam (Co-Ni 3 S 2 /NF) as a high-efficiency OER electrocatalyst for seawater. In alkaline conditions, Co-Ni 3 S 2 /NF requires an overpotential of only 368 mV to drive 100 mA·cm −2 , superior to Ni 3 S 2 /NF (385 mV). Besides, it exhibits at least 50-h continuous electrolysis.
✓ 已验证
产品关联
DOI
高影响因子
Nature Communications
·
2023
·Vol. 14
·期 1
·1-8
·
IF 16.6
Lu Yahui,Chen Xing,Han Fang,Zhao Qian,Xie Tao,Wu Jingjun,Zhang Yuhua
3D printing can produce intuitive, precise, and personalized anatomical models, providing invaluable support for precision medicine, particularly in areas like surgical training and preoperative planning. However, conventional 3D printed models are often significantly more rigid than human organs and cannot undergo repetitive resection, which severely restricts their clinical value. Here we report the stereolithographic 3D printing of personalized liver models based on physically crosslinked self-healing elastomers with liver-like softness. Benefiting from the short printing time, the highly individualized models can be fabricated immediately following enhanced CT examination. Leveraging the high-efficiency self-healing performance, these models support repetitive resection for optimal trace through a trial-and-error approach. At the preliminary explorative clinical trial (NCT06006338), a total of 5 participants are included for preoperative planning. The primary outcomes indicate that the negative surgery margins are achieved and the unforeseen injuries of vital vascular structures are avoided. The 3D printing of liver models can enhance the safety of hepatic surgery, demonstrating promising application value in clinical practice.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CELL RESEARCH
·
2023
·
IF 44.1
Ai Yuan-li,Wang Wei-jia,Liu Fan-jian,Fang Wei,Chen Hang-zi,Wu Liu-zheng,Hong Xuehui,Zhu Yuekun,Zhang Ci-xiong,Liu Long-yu,Hong Wen-bin,Zhou Bo,Chen Qi-tao,Wu Qiao
Pyroptosis is a type of regulated cell death executed by gasdermin family members. However, how gasdermin-mediated pyroptosis is negatively regulated remains unclear. Here, we demonstrate that mannose, a hexose, inhibits GSDME-mediated pyroptosis by activating AMP-activated protein kinase (AMPK). Mechanistically, mannose metabolism in the hexosamine biosynthetic pathway increases levels of the metabolite N -acetylglucosamine-6-phosphate (GlcNAc-6P), which binds AMPK to facilitate AMPK phosphorylation by LKB1. Activated AMPK then phosphorylates GSDME at Thr6, which leads to blockade of caspase-3-induced GSDME cleavage, thereby repressing pyroptosis. The regulatory role of AMPK-mediated GSDME phosphorylation was further confirmed in AMPK knockout and GSDME T6E or GSDME T6A knock-in mice. In mouse primary cancer models, mannose administration suppressed pyroptosis in small intestine and kidney to alleviate cisplatin- or oxaliplatin-induced tissue toxicity without impairing antitumor effects. The protective effect of mannose was also verified in a small group of patients with gastrointestinal cancer who received normal chemotherapy. Our study reveals a novel mechanism whereby mannose antagonizes GSDME-mediated pyroptosis through GlcNAc-6P-mediated activation of AMPK, and suggests the utility of mannose supplementation in alleviating chemotherapy-induced side effects in clinic applications.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Science China-Technological Sciences
·
2023
·Vol. 66
·期 8
·2225-2236
·
IF 4.6
Zhao HaiBo,Liu Peng,Huang YanYan,Zhang HongBin
Paper-based relics as important carriers of human history and civilization have been facing severe damage problems, and their protection is a major project for cultural heritage restoration. So far, safe, high-efficiency, and multifunctional protection materials are still urgent to be developed. Herein, through screening a series of alkaline nano-oxides and cleverly combining the advantages of modified natural polymer (quaternized chitosan) and inorganic nanomaterials (ZnO), we successfully prepared their functional nanocomposites with multiple properties and pioneered their smart application for multifunctional protection of paper relics. By spraying loads, this kind of nanocomposites can effectively and safely inhibit the acid degradation of paper relics and long-term maintain a natural or weak basic state even under harsh accelerated aging conditions. Meanwhile, the coating of nanocomposites does not change the chromatic aberration but partially improves the hydrophobicity. Moreover, the mechanical properties of paper relics are reinforced up to more than one time for all-around tensile strength, folding endurance, and tearing strength. It is worth noting that the usage of nanocomposites can avoid the discoloration or fading of pH-sensitive pigments/dyes and prevent the blue/red inks from ink-spreading. By integrating the anti-microorganism effects of the two components, the nanocomposites have exhibited a broad antimicrobial capacity for both fungi (e.g., Plectosphaerella cucumerina and Aspergillus unguis ) and bacteria (e.g., Staphylococcus aureus ). The acquired knowledge not only represents an advanced step for designing functionalized inorganic/polymer nanocomposite but also sheds light on the multi-functional integrated protection of paper-based relics.
✓ 已验证
产品关联
DOI
高影响因子
BIOPROCESS AND BIOSYSTEMS ENGINEERING
·
2023
·Vol. 46
·期 9
·1365-1373
·
IF 3.8
Wang Ru,Jia Jianyao,Liu Xue,Chen Yaru,Xu Qing,Xue Feng
Chiral compounds are important drug intermediates that play a critical role in human life. Herein, we report a facile method to prepare multi-enzyme nano-devices with high catalytic activity and stability. The self-assemble molecular binders SpyCatcher and SpyTag were fused with leucine dehydrogenase and glucose dehydrogenase to produce sc-LeuDH (SpyCatcher-fused leucine dehydrogenase) and GDH-st (SpyTag-fused glucose dehydrogenase), respectively. After assembling, the cross-linked enzymes LeuDH-GDH were formed. The crosslinking enzyme has good pH stability and temperature stability. The coenzyme cycle constant of LeuDH-GDH was always higher than that of free double enzymes. The yield of l - tert -leucine synthesis by LeuDH-GDH was 0.47 times higher than that by free LeuDH and GDH. To further improve the enzyme performance, the cross-linked LeuDH-GDH was immobilized on zeolite imidazolate framework-8 (ZIF-8) via bionic mineralization, forming LeuDH-GDH @ZIF-8. The created co-immobilized enzymes showed even better pH stability and temperature stability than the cross-linked enzymes, and LeuDH-GDH@ZIF-8 retains 70% relative conversion rate in the first four reuses. In addition, the yield of LeuDH-GDH@ZIF-8 was 0.62 times higher than that of LeuDH-GDH, and 1.38 times higher than that of free double enzyme system. This work provides a novel method for developing multi-enzyme nano-device, and the ease of operation of this method is appealing for the construction of other multi-enzymes @MOF systems for the applications in the kinds of complex environment. Graphical abstract
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Food Measurement and Characterization
·
2023
·Vol. 17
·期 5
·5360-5370
·
IF 3.4
Wang Wenhui,Yang Zhen-quan,Xiao Lixia,Guan Tianzhu,Gong Xiaojuan,Hu Qin
This work present a highly sensitive fluorescence method for auramine O (AO) detection in food and drug samples based on carbon nanodots (CDs). The AO can effectively diminish the emission of CDs based on an integrated quenching mechanism of inner filter effect (IFE) and dynamic reaction. The CDs were prepared via a one-step hydrothermal method with citric acid and o-phenylenediamine as precursors. The good selectivity and high sensitivity feature of the proposed method for AO detection were validated. The fluorescence signals were linearly correlated with AO concentration over a range of 0.01‒10.0 µM with a detection limit of 36.3 nM was obtained. The proposed method was finally used for AO determination in traditional Chinese medicine, curry power, bean curb and candy samples with high accuracy. The recoveries ranged from 95.5 to 107.2% and relative standard deviations (RSDs) were less than 3.39%. This work provided a new insight and an operational access to AO detection in food and drug colorants monitoring. Thus, the CDs-based sensor demonstrated feasibility of rapid AO detection considering its appealing simplicity, rapidity and high sensitivity features.
✓ 已验证
产品关联
DOI
高影响因子
Nature Communications
·
2023
·Vol. 14
·期 1
·1-10
·
IF 16.6
Miao Yingxuan,Zhao Yunxuan,Waterhouse Geoffrey I. N.,Shi Run,Wu Li-Zhu,Zhang Tierui
The widespread use of polyolefin plastics in modern societies generates huge amounts of plastic waste. With a view toward sustainability, researchers are now seeking novel and low-cost strategies for recycling and valorizing polyolefin plastics. Herein, we report the successful development of a photothermal catalytic recycling system for transforming polyolefin plastics into liquid/waxy fuels under concentrated sunlight or xenon lamp irradiation. Photothermal heating of a Ru/TiO 2 catalyst to 200–300 °C in the presence of polyolefin plastics results in intimate catalyst-plastic contact and controllable hydrogenolysis of C-C and C-H bonds in the polymer chains (mediated by Ru sites). By optimizing the reaction temperature and pressure, the complete conversion of waste polyolefins into valuable liquid fuels (86% gasoline- and diesel-range hydrocarbons, C 5 -C 21 ) is possible in short periods (3 h). This work demonstrates a simple and efficient strategy for recycling waste polyolefin plastics using abundant solar energy.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CELLULOSE
·
2023
·Vol. 30
·期 12
·7865-7875
·
IF 5.7
Chen Qi,Zuo Wenjing,Xie Zhen,Liu Wenjing,Lu Miaomiao,Qiu Xingheng,Habib Sania,Jing Yidan,Zhang Xiaomin,Yu Ningya,Su Shengpei,Zhu Jin
Due to the severe environmental pollution the paper-making process often causes, the rewritten paper has emerged as a key research area to replace traditional paper. However, it is challenging to achieve application control and maximize resource utilization in various occasions when using the recently reported photochromic papers, which have low fading efficiency and poor regeneration effect. In this study, a composite film made of sodium alginate (SA) and polyvinyl alcohol (PVA) with ammonium molybdate serving as the photochromic component was prepared. The film had mechanical properties similar to paper, good resolution, and visible color after 50 days. With a magnification of 20 times, the distinct borders were still discernible. Through water-soluble-regeneration of the damaged film, the photochromic film can be faded, regenerated and reused, which has a lengthy storage time for information. The film quality and resolution do not considerably degrade after ten cycles of the "information writing—dissolution (fading)—regenerative writing" closed-loop process, exhibiting excellent recycling performance and high recovery rate. Hence, the photochromic film presents a refreshing approach to the design of rewriteable paper.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2023
·Vol. 58
·期 28
·11666-11679
·
IF 4.5
Wang Yanting,Zhang Xuefei,Lin Jia-Horng,Li Ting-Ting,Lou Ching-Wen,Lin Jiao,Yang Hongying
The rapid development of wireless communication and electronic equipment requires active measures to eliminate electromagnetic radiation hazards. Based on the layered assembly strategy, MXene-based composite fabric with multiple functional layers was prepared by combining two-dimensional transition metal (MXene) with PP substrate by a simple solution dipping method. PP substrate endowed pure MXene film certain mechanical properties, and polydopamine modification on the surface of PP enhanced the bonding fastness between the substrate and MXene layer. The silicon-containing hydrophobic layer imparted hydrophobic properties to the conductive fabric, thus ensuring the stability of the conductivity of the MXene layer when used in complex environments. The results shown that the conductivity and electromagnetic shielding effectiveness (EMI SE) of the composite fabric increased with the increased in impregnation times. When the impregnation times were three, the conductivity and EMI SE of the composite fabric were 6.54 S/cm and 32.57 dB, respectively. After hydrophobic treatment, the contact angle of the composite fabric was 140.49°. In addition, the average EMI SE and shielding efficiency still reached 25.12 dB and 99.69%. The excellent EMI shielding capability coupled with favorable bendability endows MXene-based composite fabric to be an alternative choice in electronics, aerospace and smart wearables.
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）