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分子植物育种 2024年

作者：朱琴李丞晖卢迎春和四梅张广辉杨生超沙本才云南农业大学西南中药材种质创新与利用国家地方联合工程研究中心云南农业大学云南省药用植物生物学重点试验室

利用灯盏花锌指转录因子(Eb c2H2)进行拟南芥遗传转化，验证基因功能。为揭示灯盏花叶片数目和开花时间分子机理奠定一定的基础。首先从灯盏花叶片克隆并获得全长Eb c2H2，构建植物表达载体。其次蘸花法侵染拟南芥进行异源表达，通过筛... 详细信息

利用灯盏花锌指转录因子(Eb c2H2)进行拟南芥遗传转化，验证基因功能。为揭示灯盏花叶片数目和开花时间分子机理奠定一定的基础。首先从灯盏花叶片克隆并获得全长Eb c2H2，构建植物表达载体。其次蘸花法侵染拟南芥进行异源表达，通过筛选获得T1、T2、T3代若干阳性植株。最后统计T3代阳性植株叶片数目、开花时间，RT-qPcR检测Eb c2H2表达量，测定植物激素含量。结果T3代阳性植株比野生型叶数增多，开花时间延迟；Eb c2H2在转基因拟南芥植株叶片中具有较高的表达量；转基因拟南芥植株中TRP、TZOG、GA1激素含量显著高于野生拟南芥植株，特别是转基因植株中的L-色氨酸是野生型的2倍。Eb c2H2可能参与调控灯盏花叶片数目和开花时间。

关键词：灯盏花 c H 锌指转录因子拟南芥遗传转化植物激素

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An Aqueous Manganese-Ion Battery with NaV6O15/c Microrods as a Stable Mn²⁺ Storage Host

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BATTERIES & SUPERcAPS 2023年第4期6卷

作者： Soundharrajan, Vaiyapuri Lee, Jun Kim, Sungjin Kim, Jung Ho Hwang, Jang-Yeon Kim, Jaekook Chonnam Natl Univ Dept Mat Sci & Engn Gwangju 500757 South Korea Univ Wollongong Inst Superconducting & Elect Mat ISEM Australian Inst Innovat Mat AIIMs North Wollongong NSW 2500 Australia Hanyang Univ Dept Energy Engn Seoul 04763 South Korea

Manganese-ion batteries (MIBs) involving aqueous electrolytes are regarded as next-generation energy-storage systems for utilization in safe and non-flammable, grid-scale energy-storing appliances. For practical application, it is very important to establish a stable cathode with a high capacity and stable cycle life. In this respect, vanadium-based layered oxides have been well demonstrated as suitable cathodes for aqueous-electrolyte-based batteries due to their high theoretical capacity and adequate working voltage. However, the dissolution of vanadium in the aqueous electrolyte directly affects the cycle life of the vanadium-based layered oxides. In the present study, a carbon-coating approach is established to boost the rate capability and cycling stability of the NaV6O15 (NVO) cathode. When employed as a cathode for MIBs, the carbon-coated NaV6O15 (NVO/c) supplies a stable recoverable capacity of 149 mAh g(-1) at 0.4 A g(-1) after the 1600 consecutive cycles with 88 % capacity retention, along with a rapid Mn2+ storage ability of 6000 cycles at 3.0 A g(-1) with 74 % capacity retention.

关键词： carbon coating manganese-ion batteries Mn2+ intercalation NaV6O15 c

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Ultrafast charge-Discharge capable and Long-Life Na3.9Mn0.95Zr0.05V(PO4)3/c cathode Material for Advanced Sodium-Ion Batteries

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SMALL 2023年第17期19卷 2206987-2206987页

作者： Wang, Zhuangzhou cui, Guijia Zheng, Qinfeng Ren, Xiangyu Yang, Qingheng Yuan, Siqi Bao, Xu Shu, chaojiu Zhang, Yixiao Li, Linsen He, Yu-Shi chen, Liwei Ma, Zi-Feng Liao, Xiao-Zhen Shanghai Jiao Tong Univ Shanghai Electrochem Energy Devices Res Ctr Sch Chem & Chem Engn Shanghai 200240 Peoples R China Shanghai Jiao Tong Univ Situ Ctr Phys Sci Shanghai Electrochem Energy Device Res Ctr Sch Chem & Chem Engn Shanghai 200240 Peoples R China Shanghai Jiao Tong Univ Frontiers Sci Ctr Transformat Mol Shanghai 200240 Peoples R China Shanghai Jiao Tong Univ Sch Mat Sci & Engn State Key Lab Met Matrix Composites Shanghai 200240 Peoples R China Jiangsu PYLON BATTERY CO LTD Yangzhou 211400 Peoples R China

Na4MnV(PO4)(3)/c (NMVP) has been considered an attractive cathode for sodium-ion batteries with higher working voltage and lower cost than Na3V2(PO4)(3)/c. However, the poor intrinsic electronic conductivity and Jahn-Teller distortion caused by Mn3+ inhibit its practical application. In this work, the remarkable effects of Zr-substitution on prompting electronic and Na-ion conductivity and also structural stabilization are reported. The optimized Na3.9Mn0.95Zr0.05V(PO4)(3)/c sample shows ultrafast charge-discharge capability with discharge capacities of 108.8, 103.1, 99.1, and 88.0 mAh g(-1) at 0.2, 1, 20, and 50 c, respectively, which is the best result for cation substituted NMVP samples reported so far. This sample also shows excellent cycling stability with a capacity retention of 81.2% at 1 c after 500 cycles. XRD analyses confirm the introduction of Zr into the lattice structure which expands the lattice volume and facilitates the Na+ diffusion. First-principle calculation indicates that Zr modification reduces the band gap energy and leads to increased electronic conductivity. In situ XRD analyses confirm the same structure evolution mechanism of the Zr-modified sample as pristine NMVP, however the strong Zr-O bond obviously stabilizes the structure framework that ensures long-term cycling stability.

关键词： cathode materials Na4MnV(PO4)(3) c sodium-ion batteries Zr-substitution

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Mo2c-Loaded Porous carbon Nanosheets as a Multifunctional Separator coating for High-Performance Lithium-Sulfur Batteries

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MATERIALS 2023年第4期16卷 1635-1635页

作者： Zhang, Jianli Wang, Yang Zhou, Zhenkai chen, Qiang Tang, Yiping Zhejiang Univ Technol Coll Mat Sci & Engn Hangzhou 310014 Peoples R China

Lithium-sulfur batteries have emerged as one of the promising next-generation energy storage devices. However, the dissolution and shuttling of polysulfides in the electrolyte leads to a rapid decrease in capacity, severe self-discharge, and poor high-temperature performance. Here, we demonstrate the design and preparation of a Mo2c nanoparticle-embedded carbon nanosheet matrix material (Mo2c/c) and its application in lithium-sulfur battery separator modification. As a polar catalyst, Mo2c/c can effectively adsorb and promote the reversible conversion of lithium polysulfides, suppress the shuttle effect, and improve the electrochemical performance of the battery. The lithium-sulfur battery with the Mo2c/c =-modified separator showed a good rate of performance with high specific capacities of 1470 and 799 mAh g(-1) at 0.1 and 2 c, respectively. In addition, the long-cycle performance of only 0.09% decay per cycle for 400 cycles and the stable cycling under high sulfur loading indicate that the Mo2c/c-modified separator holds great promise for the development of high-energy-density lithium-sulfur batteries.

关键词： lithium-sulfur batteries shuttle effect Mo2c c polar catalyst separator modification

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Pd/c catalytic cyclopropanation of polycyclic olefins for synthesis of high-energy-density strained fuels

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AIcHE JOURNAL 2023年第7期69卷 e18085-e18085页

作者： Wang, Wei Pu, Baian Ma, chi Shi, chengxiang Pan, Lun Zhang, Xiangwen Zou, Ji-Jun Tianjin Univ Sch Chem Engn & Technol Key Lab Green Chem Technol Minist Educ Tianjin 300072 Peoples R China Collaborat Innovat Ctr Chem Sci & Engn Tianjin Tianjin Peoples R China Haihe Lab Sustainable Chem Transformat Tianjin Peoples R China

cyclopropane derivates are appealing to synthesis of high-energy-density fuels because of the high strained energy of the three-numbered ring. The catalytic cyclopropanation of olefin with diazomethane is very effective to construct the carbocycle. The majority of the catalysts employed are nonrecyclable homogeneous compounds. Herein, we report cyclopropanation of polycyclic olefins catalyzed by heterogeneous Pd/c. The optimal cyclopropanation conditions were explored utilizing dicyclopentadiene as model substrate and a series of polycyclic olefins were cyclopropanated with high yield. Additionally, the catalyst has good recyclability and stability, as shown by characterizations as well as the fact that no inactivation happens after cyclopropanation. The synthesized cyclopropane derivates exhibit good fuel characteristics like high density (1.006-1.087 g/cm(3)), high volumetric net heat of combustion (42.58-46.45 kJ/cm(3)), good low-temperature and combustion performance. This work shows industrial potential for cyclopropanation of polycyclic olefins with diazomethane.

关键词： cyclopropanation diazomethane high-energy-density fuel Pd c polycyclic olefin

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Electrocatalysis cα-cβ and cβ-O bond cleavage of lignin model compound using Ni-co/c as catalyst electrode in deep eutectic solventx

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JOURNAL OF ELEcTROANALYTIcAL cHEMISTRY 2023年第1期938卷

作者： Zhang, Jifang Suo, chengcheng Sun, Jinde Li, Wei Luo, Sha Ma, chunhui Liu, Shouxin Northeast Forestry Univ Coll Mat Sci & Engn Minist Educ Key Lab Biobased Mat Sci & Technol Harbin 150040 Peoples R China

In this study, c alpha-c beta and c beta-O bond cleavage of beta-O-4 model compound (2-phenoxy-1-phenylethanol) were accomplished by electrocatalysis depolymerization process in deep eutectic solvents (DES) systems. We have investigated the application of Ni-co/c catalysts on working electrode, which were synthesized with impreg-nation method. The Ni-co/c with porous structure and abundant active sites, was shown an excellent electro-catalysis activity. Specific structure of Ni-co/c could provide greatly efficient adsorption and desorption capacity to promote c alpha-c beta and c beta-O bond cleavage. Therefore, in this electrocatalysis depolymerization pro-cess, the highest depolymerization rate exceeded 90%. And the yields (and conversion rates) of products (in-cluding benzaldehyde, acetophenone, benzoic acid, phenol) can reach to 124.08 mg/g (25.05%), 23.29 mg/g (4.15%), 44.64 mg/g (7.83%), 30.3 mg/g (6.9%). Furthermore, the electrocatalysis mechanism of c alpha-c beta and c beta-O bond was investigated. The cleavage of c alpha-c beta and c beta-O bond was initiated by in situ generated free rad-icals through Ni-co/c. Then, the cleavage of c alpha-c beta and c beta-O bond were occurred by center dot OH and center dot O2-. The results were showed that the c alpha-c beta bond cleavage was more in line with the beta-c elimination and free radical pathways, and c beta-O bond cleavage was consistent with direct oxidative addition. The enhanced electrocatalytic efficiency of the low-cost Ni-co/c electrocatalyst combined with its good chemical stability and selectivity, which offer a promising route for developing an efficient lignin depolymerization technology.

关键词： Electrocatalysis DES Ni-co c Electrochemical mechanism Lignin

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MEK/ERK MAP kinase limits poly I:c-induced antiviral gene expression in RAW264.7 macrophages by reducing interferon-beta expression

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FEBS LETTERS 2021年第21期595卷 2665-2674页

作者： Freed, Shawn M. Baldi, Danielle S. Snow, Jason A. Athen, Sierra R. Guinn, Zachary P. Pinkerton, T. Scott Petro, Thomas M. Moore, Tyler c. Bellevue Univ Coll Sci & Technol Dept Biol Bellevue WA 68005 USA Univ Nebraska Med Ctr Coll Dent Dept Oral Biol Lincoln NE USA

Toll-like receptor 3 (TLR3) recognizes viral double-stranded RNA (or the synthetic dsRNA analog poly I:c) and induces a signal transduction pathway that results in activation of transcription factors that induce expression of antiviral genes including type I interferon (IFN-I). Secreted IFN-I positively feeds back to amplify antiviral gene expression. In this report, we study the role of MEK/ERK MAP kinase in modulating antiviral gene expression downstream of TLR3. We find MEK/ERK is a negative regulator of antiviral gene expression by limiting expression of IFN-beta. However, MEK/ERK does not limit antiviral responses downstream of the type I interferon receptor. These findings provide insights into regulatory mechanisms of antiviral gene expression and reveal potential targets for modulating antiviral immunity.

关键词： EGFR ERK interferon IRF3 ISG poly I c RAW264 7 TLR3

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Support can increase use of the AUDIT-c in Australian Aboriginal community controlled Health Services: a cluster randomized trial

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ADDIcTION 2021年第9期116卷 2304-2315页

作者： conigrave, James H. Harrison, Kristie H. Lee, K. S. Kylie Dobbins, Timothy A. Hummerston, Beth Hayman, Noel Perry, Jimmy Ivers, Rowena Haber, Paul S. Wilson, Scott Johnson, David conigrave, Katherine M. Univ Sydney Ctr Res Excellence Indigenous Hlth & Alcohol Cent Clin Sch Fac Med & Hlth Sydney NSW Australia La Trobe Univ Ctr Alcohol Policy Res Melbourne Vic Australia Univ New South Wales Sch Publ Hlth & Community Med Sydney NSW Australia Aboriginal Hlth Council South Australia Adelaide SA Australia Inala Indigenous Hlth Serv Southern Queensland Ctr Excellence Aboriginal & T Inala Qld Australia Aboriginal Drug & Alcohol Council South Australia Underdale SA Australia Illawarra Aboriginal Med Serv Wollongong NSW Australia Univ Wollongong Sch Med & Hlth Wollongong NSW Australia Royal Prince Alfred Hosp Drug Hlth Serv Level 6King George V Bldg Camperdown NSW 2050 Australia

Background and Aims Unhealthy alcohol consumption is a key concern for Aboriginal and Torres Strait Islander ('Indigenous') communities. It is important to identify and treat at-risk drinkers, to prevent harms to physical or social wellbeing. We aimed to test whether training and support for Aboriginal community controlled Health Service (AccHS) staff would increase rates of alcohol screening and brief intervention. Design cluster randomized trial. Setting Australia. cases/Intervention/Measurements Twenty-two AccHSs that see at least 1000 clients per year and use communicare as practice management software. The study included data on 70 419 clients, training, regular data feedback, collaborative support and funding for resources ($9000). Blinding was not used. The comparator was waiting-list control (equal allocation). Alcohol Use Disorder Identification Test (AUDIT-c) screening and records of brief interventions were extracted from practice management software at 2-monthly intervals. Observations described the clinical actions taken for clients over each 2-month interval. The baseline period (28 August 2016-28 August 2017) was compared with the post-implementation period (29 August 2017-28 August 2018). We used multi-level logistic regression to test the hypotheses that clients attending a service receiving active support would be more likely to be screened with AUDIT-c (primary outcome) or to receive a brief intervention (secondary outcome). Findings We observed an increase in the odds of screening with AUDIT-c for both groups, but the increase was 5.52 [95% confidence interval (cI) = 4.31, 7.07] times larger at services receiving support. We found little evidence that the support programme increased the odds of a recorded brief intervention relative to control services (odds ratio = 2.06;95% cI = 0.90, 4.69). Differences in baseline screening activity between treatment and control reduce the certainty of our findings. conclusions Providing Aboriginal community co

关键词： Alcohol screening AUDIT‐ c brief intervention data feedback Indigenous Australians training

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Generation and characterization of a tractable c. elegans model of tauopathy

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GEROScIENcE 2021年第5期43卷 2621-2631页

作者： Russell, Joshua c. Lei, Haoyi chaliparambil, Rahul K. Fish, Sarah Markiewicz, Susan M. Lee, Ting-, I Noori, Anushka Kaeberlein, Matt Univ Washington Dept Lab Med & Pathol Seattle WA 98195 USA Bellevue Coll Bellevue WA USA

Alzheimer's disease(AD) is an age-associated neurodegenerative disease that results in deterioration of memory and cognitive function. As a currently untreatable disorder, AD has emerged as one of the defining biomedical challenges of our time. Thus, new approaches that can examine the cellular and molecular mechanisms underlying age-related AD pathology are sorely needed. One of the hallmarks of Alzheimer's disease is the hyperphosphorylation of the tau protein. caenorhabditis elegans have been previously used to study the genetic pathways impacted by tau proteotoxic stress;however, currently, available c. elegans tau models express the human protein solely in neurons, which are unresponsive to global RNA interference (RNAi). This limits powerful RNAi screening methods from being utilized effectively in these disease models. Our goal was to develop a c. elegans tau model that has pronounced tau-induced disease phenotypes in cells that can be modified by feeding RNAi methods. Towards this end, we generated a novel c. elegans transgenic line with codon-optimized human 0N4R V337M tau expressed in the body wall muscle under the myo-3 promoter. Immunoblotting experiments revealed that the expressed tau is phosphorylated on epitopes canonically associated with human AD pathology. The tau line has significantly reduced health metrics, including egg laying, growth rate, paralysis, thrashing frequency, crawling speed, and lifespan. These defects are suppressed by RNAi directed against the tau mRNA. Taken together, our results suggest that this alternative tau genetic model could be a useful tool for uncovering the mechanisms that influence the hyperphosphorylation and toxicity of human tau via RNAi screening and other approaches.

关键词： c elegans Alzheimer's disease Tauopathy Genetic screening tool Lifespan Healthspan

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Microstructure and ablation mechanism of c/c-Zrc-Sic composite in the solid scramjet plumes environment

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MATERIALS cHARAcTERIZATION 2023年 198卷

作者： Liu, Yuchen Xia, Zhixun Ma, Likun Yang, Pengnian chen, Binbin Feng, Yunchao Zeng, Yi Li, chaolong Zhang, Jiarui Duan, Yifan Natl Univ Def Technol Coll Aerosp Sci & Engn Changsha 410073 Peoples R China Cent South Univ State Key Lab Powder Met Changsha 410083 Peoples R China

This study offered a new ablation test environment encountered in the solid scramjet, highlighted by ultra-high temperature, strong oxidation, and supersonic gas-solid two-phase flow. In this environment, microstructure and ablation mechanism of c/c-Zrc-Sic composite was studied. Initially, oxidation and thermal-shock generated a loose surface that would be exfoliated by the flow and then successively caused grooves, humps, and pulled-out fibers. Finally, evaporation and oxidation intensified with increasing temperature. Notably, for one thing, particles in the flow imposed severe mechanical denudation on the composite. For another, some particles, such as B2O3 and Fe2O3, could also induce oxidation at high temperatures. Moreover, different oxidation behavior of ceramics in the thickness direction aggravated the degradation. The abovementioned reasons caused the highest mass ablation rate (MAR) compared with other test environments. For example, the MAR was almost six times the average value in an oxyacetylene torch. This work aims to provide the basis for improving materials for application in solid scramjet.

关键词： c c-Zrc-Sic composite Microstructure Ablation mechanism Solid scramjet Supersonic gas-solid two-phase flow

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