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comparative Evaluation of Physiological Response and Drought Tolerance between cunninghamia unica and c. lanceolata Seedlings under Drought Stress

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FORESTS 2023年第3期14卷 464页

作者： Lei, Xun Wu, Huaxue Yin, Man Zhang, Xi Yang, Hanbo Huang, Xiong Zhu, Peng Sichuan Agr Univ Forestry Ecol Engn Upper Reaches Yangtze River Key Rainy Area West China Plantat Ecosyst Permanent Sc Natl Forestry & Grassland AdmKey Lab Forest Resou Chengdu 611130 Peoples R China

cunninghamia plays an important role in china's southern forest industry in the face of increasingly arid climate;thus it is urgent to identify and screen drought-tolerant varieties. In this study, 2-year-old seedlings of c. unica and c. lanceolata from four provenances were subjected to water-break tests, and their physiological responses to different drought conditions were observed. The results showed that with the aggravation of drought stress, c. unica had more stable changes in relative water content (RWc), water potential (psi w) and intercellular cO2 concentration (ci) with more cumulative amounts of proline (PRO) than c. lanceolata, and its H2O2 maintained at a lower level, along with antioxidant enzyme activities decreasing later as compared with c. lanceolata. Moreover, comprehensive evaluation showed that c. unica had a higher drought tolerance than c. lanceolata as a whole, which could have been shaped by maintaining psi w and opening stomata in its relative drought conditions. This work provides a theoretical basis for understanding the drought tolerance of c. unica and c. lanceolate individuals, so as to accelerate selective breeding in chinese fir.

关键词： c unica lanceolata drought tolerance drought stress comprehensive evaluation

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The quality and quantity of SOM determines the mineralization of recently added labile c and priming of native SOM in grazed grasslands

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GEODERMA 2023年 432卷

作者： Li, chao Xiao, chunwang Li, Mingxu Xu, Li He, Nianpeng Minzu Univ China Coll Life & Environm Sci Beijing Peoples R China Chinese Acad Sci Inst Geog Sci & Nat Resources Res Key Lab Ecosyst Network Observat & Modeling Beijing Peoples R China Univ Chinese Acad Sci Coll Resources & Environm Beijing Peoples R China Northeast Forestry Univ Ctr Ecol Res Harbin Peoples R China

continuous and pulsed inputs of labile organic carbon (LOc) into soil are common. However, because soil mi-crobial responses to LOc input are rapid, the relative contributions of respiration derived from LOc to total microbial respiration and their influencing factors remain elusive. Furthermore, although numerous studies have explored the priming effect (PE) of soil organic matter (SOM) mineralization induced by LOc addition, few studies have focused on its short-term effects. There are some indications that the response of soil microbes to LOc input depends on the microbial demand of nutrients, especially c and N. Therefore, variations in soil c and N characteristics may further influence microbial response processes to LOc inputs and the decomposition of LOc and SOM, but a comprehensive understanding of this is lacking. To address this gap, 13c-labeled glucose was added to six temperate grassland soils with different c/N ratios (9.98-12.0), which were collected from areas with different grazing exclusion durations and at different soil depths. The microbial respiration was measured at 9-min intervals across a 105-h period. We found that soil microbes responded rapidly to LOc input, and mi-crobial biomass controlled by soil organic c (SOc) and c/N was the most important factor directly influencing the intensity of the microbial response to LOc input. Grazing and deeper soil layers decreased the respiration derived from LOc and their relative contribution to total respiration, mainly attributed to variations in soil c/N and fungal/bacterial ratio (Fu/Ba). LOc addition stimulated SOM decomposition in all soils and increased respiration of SOM by 11.3-92.4 mg c/g SOc, equivalent to 18.7-266.1 % priming. Grazing and increased soil depth resulted in a greater PE and soil c loss, with soil c/N and SOc content being the most important regulators. Overall, this study revealed the important influence of LOc on soil c fluxes and highlighted the important role of SOM quality

关键词： c N ratio SOM quantity Priming effect Grazing exclusion Soil depth Soil c balance

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Assessment and simulation of the thermomechanical tensile and creep behavior of c/PEKK composites for aircraft applications above the glass transition temperature

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cOMPOSITE STRUcTURES 2023年第1期318卷

作者： Pedoto, Giuseppe Grandidier, Jean-claude Gigliotti, Marco Vinet, Alain Univ Poitiers Inst Pprime Dept Phys & Mecan Mat ISAE ENSMACNRS Poitiers France Airbus SAS Bldg D42 18 Marius Terce F-31025 Toulouse France SAFRAN Aircraft Engines Ctr Excellence Ind Pieces Compos Tisse Rond point Rene Ravaud F-77550 Moissy Cramayel France

The present work focuses on the assessment and the simulation of the thermomechanical tensile and creep behavior of Poly Ether Ketone Ketone 7002/carbon fibers composites behavior under tensile and creep solicitation between the glass transition temperature and 200 degrees c, via a multiscale approach starting from the behavior of the PEKK 7002 neat *** and creep polymer and composite experimental curves are employed to develop and validate generalized Semi - Analytical Homogenization / Localization Method for the simulation of the thermomechanical tensile and creep behavior of composite laminates. Through the employment of the model, a similarity of behavior between polymer and composites is *** proposed algorithm capabilities of simulating the thermomechanical tensile and creep behavior of composites with different ply orientations and stacking sequences are then presented.

关键词： c PEKK composites Tensile creep Multi-scale semi-analytical method

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Physiochemical responses of c. elegans under exposure to lanthanum and cerium affected by bacterial metabolism

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ScIENcE OF THE TOTAL ENVIRONMENT 2023年第1期894卷 165018页

作者： Lan, Wenning Zhang, Xiaojing Lin, Junhao Xiao, Xiaolian chen, Junkun Sun, Shiying Hong, Guanlan Nian, Jingjing Zhang, Fangrong Zhang, Yun Fujian Med Univ Sch Basic Med Sci Key Lab Gastrointestinal Canc Minist Educ Fuzhou 350122 Peoples R China Chinese Acad Sci Xiamen Inst Rare Earth Mat Haixi Inst Xiamen Key Lab Rare Earth Photoelect Funct Mat Xiamen 361021 Peoples R China Univ Sci & Technol China Sch Rare Earths Hefei 230026 Peoples R China Chinese Acad Sci Inst Mat & Chem Ganjiang Innovat Acad Ganzhou 341000 Peoples R China

The increasing demand for rare earth elements (REEs) in modern applications has drawn significant attention. REEs can be introduced into the environment through REE-containing fertilizers, abandoned REE-rich equipment, and mining, persisting and impacting soil quality, nutrient cycles, and plant growth. Scientists have raised concerns about REEs entering the food chain from the environment and eventually accumulating in organisms. Decades of experimental evidence have shown that these effects include inhibited growth, impaired liver function, and alterations in children's intelligence quotients. However, there exists a paucity of research that has elucidated the metabolic-level biological impacts of REEs. In our study, caenorhabditis elegans (c. elegans) was used as a model organism to investigate physiological and inherent metabolic changes under exposure to different concentrations of REEs. The diet bacteria of nematodes play a key role in their life and development. Therefore, we investigated the influence of bacterial activity on the nematodes' response to REE exposure. We observed a concentration-dependent accumulation of REEs in nematodes, which consequently led to a reduction in lifespan and alterations in body length. Exposure to a mixed solution of REEs, in comparison to a single REE solution, resulted in greater toxicity toward nematodes. The metabolic results showed that the above changes were closely related to REE-induced amino acid metabolism disorder, membrane disturbance, DNA damage, and oxidative stress. Of note, the presence of living bacteria elicits REE effects in c. elegans. These findings highlight the potential intrinsic metabolic changes occurring in nematodes under REE exposure. Our study raises awareness of the exposure risks associated with REEs, provides valuable insight into the metabolic-level biological impacts of REEs and contributes to the development of effective mitigation strategies to reduce potential risks to human health.

关键词： Rare earth element NMR spectroscopy Metabolomics Bacterial activity c elegans

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Beta-strand-mediated dimeric formation of the Ig-like domains of human lamin A/c and B1

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BIOcHEMIcAL AND BIOPHYSIcAL RESEARcH cOMMUNIcATIONS 2021年 550卷 191-196页

作者： Ahn, Jinsook Lee, Jinwook Jeong, Soyeon Kang, So-mi Park, Bum-Joon Ha, Nam-chul Seoul Natl Univ Res Inst Agr & Life Sci Dept Agr BiotechnolCtr Food Safety & Toxicol Ctr Food & BioconvergenceCALS Seoul 08826 South Korea Pusan Natl Univ Dept Mol Biol Coll Nat Sci Busan 46241 South Korea

Lamins are nuclear intermediate filament proteins that play an essential role in maintaining the nuclear structure by forming a 3-D meshwork. Lamins consist of the N-terminal unstructured head, the coiled coil rod domain, and the c-terminal tail, which is mostly unstructured except for the Ig-like domain. To date, the Ig-like domain has been characterized as a monomeric structure. Here, we determined the crystal structures of human lamin A/c, including the Ig-like domain and its N-and c-terminal flanking sequences. Interestingly, the structures showed a homodimer formed by beta-strand interactions between the N-and c-terminal flanking sequences. This interaction also provides a molecular implication for the creation of a 3-D meshwork between the 3.5-nm-thick filaments. Furthermore, we determined the crystal structure of the corresponding region of lamin B1. The structure showed a similar dimeric assembly, also formed by beta-strand interactions, albeit the intersubunit distance was much shorter. Since the Ig-like domain contains many genetic hotspots causing lamin-related diseases in lamin A/c, our findings will help understand the detailed assembly of lamins in a 3-D meshwork structure and laminrelated diseases at the molecular level. (c) 2021 Published by Elsevier Inc.

关键词： Lamin A c Lamin B1 Ig-like domain crystal structure Dimeric assembly Lamin filament

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cuxPd1-xO nanoparticle-reduced graphene oxide nanocomposite catalyzed direct ortho-c-H acylation of 2-aryl pyridines

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cATALYSIS cOMMUNIcATIONS 2023年 174卷

作者： Hu, Qiyan Gao, Liwen Lu, Wenqi chen, Yunyan Wannan Med Coll Inst Synth & Applicat Med Mat Sch Pharm Wuhu 241002 Peoples R China

We report the application of cuxPd1-xO nanoparticle-reduced graphene oxide nanocomposites as efficient cata-lysts for direct c-H bond activation using alcohols as carbonyl sources. The composition of the cuxPd1-xO nanoparticles plays a vital role in determining their catalytic activity because of a composition-dependent synergistic effect. We show that the catalysts can be reused for successive 5 cycles without obviously losing their catalytic activity. Our catalysts offer considerable advantages over previous metallic alloy nanoparticles not only due to their catalytic performance but also for the ease of their synthesis and catalytic robustness.

关键词： Heterogeneous catalysis cu x Pd 1-x O nanoparticle Synergistic effect Recyclable catalyst c H acylation

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The Immunization of Protoscolices P29 DNA Vaccine on Experimental cystic Echinococosis in Balb/c Mice

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AcTA PARASITOLOGIcA 2021年第4期66卷 1114-1121页

作者： Gharibi, Zahra Rahdar, Mahmoud Pirestani, Majid Tavalla, Mehdi Tabandeh, Mohammad-Reza Ahvaz Jundishapur Univ Med Sci Infect & Trop Dis Res Ctr Hlth Res Inst Ahvaz Iran Ahvaz Jundishapur Univ Med Sci Fac Med Parasitol Dept Ahvaz Iran Tarbiat Modares Univ Fac Med Sci Parasitol & Med Entomol Tehran Iran Shahid Chamran Univ Ahvaz Fac Vet Med Basic Sci Dept Ahvaz Iran

Purpose cystic Echinococosis is one of the important parasitic diseases that is considered as a problem economics and health in many parts of the world. Many efforts have been performed for controlling the disease in the world. To reach a reliable vaccine against cystic Echinococosis is one of the important duty of governments. Several antigen of hydatid cyst for vaccine candidate have been evaluated. In this study, P-29 antigen has been used for this purpose. Methods E.g P29 antigen was cloned in Escherichia coli and transfected into the chinese hamster ovary cell for antigen proliferation and used for vaccination in Balb/c mice. The recombinant antigen E.g-29 was shown using Western blot test. Two dilution of DNA vaccine (pcEgP-29) including 50 mu g/100 mu l and 100 mu g/100 mu l were prepared. Twenty four Balb/c male 6-8 week mouse were divided in 4 groups. The groups were included in 2 vaccination groups (pcEg.P29 50 mu g/100 mu l and 100 mu g/100 mu l dilution) as immunized groups and 2 groups of plasmid and PBS as control. The mice were injected intramuscularly 3 times with 2 weeks interval. After 3 weeks from last injection, all groups were challenged intraperitonealy with 2000 protoscolices. After 5 months, the mice were euthanized by ketamine/xylasine injection and number, size, and weight of cysts were recorded. Results Immunization rate was up to 93% in vaccinated group when compared with the control group. conclusion The results of this study showed that rEg.P29 could be considered as an effective vaccine for controlling of E. granulosus prevalence in intermediated host.

关键词： Echinococcosis DNA vaccine Antigen P-29 Murine model Balb c

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In-situ fabrication of Si/FeSi2@c NPs with volume control effect by fluidized bed chemical vapor deposition as anode materials

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JOURNAL OF ALLOYS AND cOMPOUNDS 2023年第1期938卷

作者： Du, Yu Hou, Guolin Yang, Zongxian Shi, Hebang Guo, Yafeng Li, chao Yuan, Fangli SINOPEC Res Inst Safety Engn Co Ltd State Key Lab Safety & Control Chem Qingdao 266071 Shandong Peoples R China SINOPEC Res Inst Petr Proc Res Ctr Renewable Energy Coll Rd 18 Beijing 100083 Peoples R China Chinese Acad Sci Inst Proc Engn State Key Lab Multiphase Complex Syst Zhongguancun Beiertiao 1 Hao Beijing 100190 Peoples R China Univ Chinese Acad Sci UCAS 19 Yuquan Rd Beijing 100049 Peoples R China Univ Chinese Acad Sci UCAS Ctr Mat Sci & Optoelect Engn 19 Yuquan Rd Beijing 100049 Peoples R China Innovat Acad Green Manufacture Beijing 100190 Peoples R China

Silicon (Si) has been proven to be the most potential anode material for the next-generation lithium-ion batteries (LIBs) because of its superior theoretical capacity (similar to 4200 mAh g-1). However, the huge volume changes, unstable solid-state interphase (SEI) layers, and large internal stresses upon the lithiation process severely limit the practical application for commercial LIBs anodes. Herein, we fabricate the carbon-coated Si/FeSi2 nanoparticles (Si/FeSi2 @c NPs) with volume control effect by fluidized bed chemical vapor de-position (FBcVD) method to solve the above-mentioned problems. These 15 min-Si/FeSi2 @c NPs and 30 min-Si/FeSi2 @c NPs show excellent Li+ storage capacity in the first cycle (2705.9/3039.1 mAh g-1 and 2645.9/2984.2 mAh g-1) with high Initial coulombic Efficiency (IcE) of similar to 89.0% and 88.7%. In-situ TEM characterization demonstrates that the carbon coating layer and inert FeSi2 phase enable a small volume variation, only similar to 37.8%, revealing the effective volume expansion control effect, and generating thin SEI layers. Besides, the perfect structure of Si/FeSi2 @c NPs makes this material a great improvement in rate performance.(c) 2022 Elsevier B.V. All rights reserved.

关键词： Si c Fluidized bed chemical vapor deposition LIBs Alloy anodes

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The Operation Dependence of c - N Fatigue for Lithium-Ion Batteries

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ADVANcED ENERGY MATERIALS 2023年第27期13卷 2300942-2300942页

作者： chen, chunguang Zou, Qingrong Wen, Jici Liu, Jin Notten, Peter H. L. Wei, Yujie Chinese Acad Sci Inst Mech State Key Lab Nonlinear Mech Beijing 100190 Peoples R China Univ Chinese Acad Sci Sch Engn Sci Beijing 100049 Peoples R China Beijing Informat Sci & Technol Univ Sch Appl Sci Beijing 100192 Peoples R China Eindhoven Univ Technol POB 513 NL-5600 MB Eindhoven Netherlands Forschungszentrum Julich IEK 9 D-52425 Julich Germany Univ Technol Sydney Sydney NSW 2007 Australia Eastern Inst Technol EIAS Ningbo 315200 Zhejiang Peoples R China

Lithium-ion batteries (LIBs) fatigue in repeated service, and their cycle-life, in resemblance to most materials subject to cyclic loading, scatters over a broad range. The dependence of critical fatigue parameters on ambient temperature and charging or discharging rate, along with the scattering nature of cycle-life is of practical significance. Through large-scale experimental investigations, it is shown how both temperatures and charging-discharging rates may influence critical parameters in the c - N fatigue dependence for LIBs. The cycle-life N of a battery subject to an average charging rate c follows c = c(0) (T)N-b(D), where c(0) varies with temperature T and b is a function of the discharging rate D. It is further shown that the cycle-life of LIBs follows a lognormal distribution. The revealed cycle-life distribution of LIBs and their fatigue law enable the construction of a probabilistic c - N model, which can be used to quantify the fatigue failure probability in LIBs. Results reported here are of compelling importance for the life-span evaluation and safety design of large-scale battery packing in electric vehicles and energy storage where tens of hundreds of batteries working in concert is desired.

关键词： c N fatigue cycle-life distribution (dis)charging rate probabilistic fatigue temperature effect

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Red phosphorus infiltrated into porous c/SiOx derived from rice husks to improve its initial coulomb efficiency in lithium-ion batteries

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cOLLOIDS AND SURFAcES A-PHYSIcOcHEMIcAL AND ENGINEERING ASPEcTS 2023年 665卷

作者： Hao, Gengyu Jiao, Rongji Deng, Zhengjun Liu, Yunying Lan, Dawei He, Wenxiu Lang, Zhongmin cui, Jinlong Inner Mongolia Univ Sci & Technol Sch Chem & Chem Engn Baotou 014010 Peoples R China Inner Mongolia Univ Sci & Technol Aerding Rd 7 Kundulun Dist 014010 Baotou Peoples R China

To overcome the poor initial coulombic efficiency (IcE) of c/SiOx anode materials of lithium-ion batteries (LIBs) and promote its industrial application, porous c/SiOx materials have been fabricated by carbonization and activation of rice husks with H3PO4 as an activator. Then, red phosphorus (RP) is infiltrated on the surface and pore inner wall of porous c/SiOx to synthesize RP@c/SiOx using the evaporation-condensation method. In the RP@c/SiOx composite, SiP2 and SiP2O7 generated by the reaction between RP and SiOx particles successfully decrease the formation of inert Li2O and Li4SiO4 during the first Li+ intercalation process. Meanwhile, RP connects with c skeleton to form P-O and P-c bonds during the preparation process, which are conducive to the production of a thin dense solid electrolyte interphase layer. All of these are beneficial to enhance the IcE of c/ SiOx. After infiltration of RP, the reversible capacity of porous c/SiOx increased from 435.2 mAh/g to 1147.4 mAh/g at 0.1 A/g, with an ameliorative IcE of 73.6% (51.02% for porous c/SiOx). Even at a higher current density of 2.0 A/g, the considerable specific capacity of 630.0 mAh/g can be obtained after 738.0 cycles.

关键词： Rice husks Red phosphorus Lithium-ion batteries Initial coulomb efficiency c SiOx

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