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有机源调理剂对草莓品质和土壤理化性质、细菌群落结构的影响

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江苏农业学报 2024年第3期40卷 531-537页

作者：张泽旺张军强张永春马洪波张辉孙书慧葛高飞安徽农业大学资源与环境学院安徽合肥230036 江苏省农业科学院农业资源与环境研究所江苏南京210014 恩施土家族苗族自治州农业农村局湖北恩施445000 金陵科技学院江苏南京210038

为提升土壤质量,减少化肥用量,改善草莓品质,本研究以草莓品种红颜为试验材料,采用大棚小区试验,设置常规施肥(CK)、有机源调理剂4800 kg/hm^(2)+常规施肥(T1)、有机源调理剂4800 kg/hm^(2)+基肥减量10%(T2)、有机源调理剂4800 kg/hm^(... 详细信息

为提升土壤质量,减少化肥用量,改善草莓品质,本研究以草莓品种红颜为试验材料,采用大棚小区试验,设置常规施肥(CK)、有机源调理剂4800 kg/hm^(2)+常规施肥(T1)、有机源调理剂4800 kg/hm^(2)+基肥减量10%(T2)、有机源调理剂4800 kg/hm^(2)+基肥减量20%(T3)、有机源调理剂4800 kg/hm^(2)+基肥减量30%(T4)5个处理,分析有机源调理剂应用与化肥减量对草莓产量、品质、根腐病发病率以及土壤理化性质和土壤细菌群落结构的影响。结果表明,与常规施肥相比,T1处理能显著提高草莓产量、土壤有机质含量和pH值,增加变形菌门和拟杆菌门细菌相对丰度。施用有机源调理剂能显著降低根腐病发病率(39.68%~64.09%)。T1和T4处理能降低放线菌门相对丰度。土壤有效磷含量、速效钾含量、有机质含量是土壤细菌群落结构的主要影响因子。T1处理对提高草莓产量和改善土壤细菌群落结构效果较好,T4处理对提高土壤有机质含量、改善团聚体结构和缓解土壤酸化效果较好。

关键词：有机源调理剂土壤理化性质细菌群落结构草莓

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Long-Term, Low-Level Microwave Radiation Impairs Learning and Memory via Synbindin: Molecular Basis and Underlying Mechanism

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Biomedical and Environmental Sciences 2022年第6期35卷 552-557页

作者： YANG Zhen Zhong WU Da Wei DING Bai ma hong bo FEI Jin Xue CHENG Liang ZHAO Ya Li State Key Lab of Space Medicine Fundamentals and Application(SMFA) Astronaut Research and Training CenterBeijing 100094China

Human beings are usually exposed to microwaves originated from the equipment in industry,communication,military,and aerospace,which has led to interest in health effects of long-term low level microwave radiation exposure,particularly on the brain,one of the most sensitive organs to microwaves[1].Morris water maze,oxidative stress related typical markers of corticosteroids(CORT),malondialdehyde(MDA),catalase(CAT),superoxide dismutase(SOD)and total antioxidant capacity(TAOC),ultrastructure,dendritic spine growth and molecular signaling pathway are important indicators in the study of learning and memory effects[2].Among them,Synbindin(Sbdn),closely associated to dendritic spine growth,learning and memory,was found to be a remarkable microwave sensitive molecule in our previous work[3]..Additionally,it’s well known that both the CA1 and Dentate Gyrus(DG)regions of the hippocampus are involved in learning and memory,however studies on the effect of microwave on DG region were less,so,this paper further focused on DG region in the study of dendrite spine,ultrastructure of neurons and phospho-extracellular signal-regulated kinase(pERK)protein ***,Synbindin was focused on and the above indicators were integrated in this paper to study the influence and mechanism of long-term low-intensity 2,100 MHz microwave on learning and memory.

关键词： organs microwave originated

Experimental investigation of dynamic characteristics of leaching tubing for solution mining of salt cavern carbon and energy storage

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Petroleum Science 2024年第4期21卷 2703-2722页

作者： Yin-Ping Li Xin-bo Ge Xi-Lin Shi hong-Ling ma State Key Laboratory of Geomechanics and Geotechnical Engineering Institute of Rock and Soil Mechanics Chinese Academy of Sciences University of Chinese Academy of Sciences College of Energy and Mining Engineering Shandong University of Science and Technology State Key Laboratory of Mining Disaster Prevention and Control Co-founded by Shandong Province and the Ministry of Science and Technology Shandong University of Science and Technology

Salt caverns are extensively utilized for storing various substances such as fossil energy, hydrogen,compressed air, nuclear waste, and industrial solid waste. In China, when the salt cavern is leached through single-well water solution mining with oil as a cushion, engineering challenges arise with the leaching tubing, leading to issues like damage and instability. These problems significantly hinder the progress of cavern construction and the control of cavern shape. The primary cause of this is the flowinduced vibration instability of leaching tubing within a confined space, which results in severe bending or damage to the tubing. This study presents a model experimental investigation on the dynamic characteristics of leaching tubing using a self-developed liquid-solid coupling physical model experiment apparatus. The experiment utilizes a silicone-rubber pipe(SRP) and a polycarbonate pipe(PCP) to examine the effects of various factors on the dynamic stability of cantilevered pipes conveying fluid. These factors include external space constraint, flexural rigidity, medium outside the pipe, overhanging length, and end conditions. The experiments reveal four dynamic response phenomena: water hammer, static buckling, chaotic motion, and flutter instability. The study further demonstrates that the length of the external space constraint has a direct impact on the flutter critical flow velocity of the cantilevered pipe conveying fluid. Additionally, the flutter critical flow velocity is influenced by the end conditions and different external media.

关键词： Salt cavern storage Solution mining Leaching tubing Experimental investigation Flutter instability

Effects on the Behavior and Neuroimmunity of Pulsed Microwaves with Different Peak Densities

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Biomedical and Environmental Sciences 2018年第12期31卷 893-897页

作者： YANG Zhen Zhong WU Da Wei ma hong bo FEI Jin Xue ZHAO Ya Li State Key Lab of Space Medicine Fundamentals and Application China Astronaut Research and Training Center

Pulsed microwaves are widely used inradar,navigation, and communication. The average power density is low at narrow pulse widths or large pulse intervals,but pulsed microwaves at certain peak densities exert numerous ... 详细信息

关键词： Effects on the Behavior and Neuroimmunity of Pulsed Microwaves with Different Peak Densities

Catalysis by subsurface metal atoms in Al(001) through electron transfer

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National Science Review 2024年第4期11卷 12-13页

作者： bo Sun Ding ma Beijing National Laboratory for Molecular Science New Cornerstone Science Laboratory College of Chemistry and Molecular Engineering Peking University

Heterogeneous catalysis plays a crucial role in the chemical industry, which has evolved from the investigation of chemisorption to an electronic structure[1]. Diverse strategies, such as alloying,doping, and confining, have been applied to enhance the catalytic properties of active sites through electronic modulation. The electron transfer between active sites and substrates profoundly influences catalytic activity [2].

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Access to High-Molecular-Weight Polyethylenes through High Temperature Ethylene Polymerization Catalysed by Ethylene-Bridged ansa-(3-R-Cyclopentadienyl)(Fluorenyl) Zirconocene Complexes

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Chinese Journal of Polymer Science 2024年第1期42卷 42-51,I0007页

作者： bo Li Haiyan ma Jiling Huang Shanghai Key Laboratory of Functional materials Chemistry and Laboratory of Organometallic Chemistry School of Chemistry and Molecular EngineeringEast China University of Science and TechnologyShanghai 200237China

A series of C1-symmetric ethylene-bridged ansa-(3-R-cyclopentadienyl)(fluorenyl) metallocene complexes(Zr: 1-5;Hf: 6) have been synthesized, characterized and investigated as catalyst precursors for the high temperature ethylene polymerization. Using methylaluminoxane(maO) as the cocatalyst, zirconium complexes 1-5 bearing a bulky substituent on the 3-position of the cyclopendienyl ring showed high catalytic activities up to 1.48×10^(7) g PE·mol_(Zr)^(-1)·h^(-1) toward the polymerization of ethylene and afforded polyethylenes with high molecular weights(1.49×10^(5)-6.31×10^(5) g/mol), meanwhile exhibting great thermal stability at high temperatures up to 120 ℃ together with a long catalytic life time up to 2 h. By adopting low Al/Zr ratios, such as 125, polyethylenes with ultra high molecular weights up to 2.86×106 g/mol were obtained. It is worthy of noting that zirconium complexes 1-4 bearing a substituent with an aryl pendant showed temperature-dependent activities, which increased rapidly with the increase of polymerization temperature, thus weak interaction of the pendent aryl group with the cationic active center is proposed to account for the very low activities displayed at low temperatures. In contrast to zirconocene complexes 1-5, hafnocene complex 6 only displayed very low catalytic activities toward the polymerization of ethylene and afforded polyethylenes with molecular weights ten times smaller than those obtained by zirconocene complexes 1-5. Zirconocene complexes 1-5 were also able to catalyse the polymerization of propylene at high temperatures, but only afforded waxes with low molecular weights.

关键词： ansa-Metallocene Ethylene Propylene Polymerization High temperature

Catalytic recycling of polyesters via a binuclear catalyst

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Science China Chemistry 2024年第2期67卷 426-427页

作者： bo Sun Ding ma Beijing National Laboratory for Molecular Science New Cornerstone Science LaboratoryCollege of Chemistry and Molecular EngineeringPeking UniversityBeijing100871China

Plastics play a crucial role in modern society life. While the increasing use of plastics and rapid accumulation of plastic waste in nature environment have caused severe environmental crisis and the waste of carbon resources. Catalytic upcycling is a promising approach to transform plastic waste into high value-added chemicals to achieve a sustainable circular economy.

关键词： Catalytic polyester catalyst

A Review and Prospect on Herbicide Adjuvants

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Journal of Northeast Agricultural University(English Edition) 2005年第2期12卷 172-176页

作者： TENG Chun-hong ma hong TAO bo Agriculture College Northeast Agricultural University Harbin Heilongjiang 150030 PRC

The history, present status and future prospects of adjuvants application in herbicides were briefly reviewed. Adjuvants can be separated into two groups, activator adjuvants and utility adjuvants. The former directly enhances the efficacy of a herbicide through increasement of herbicide absorption, spreading, cuticular penetration, rainfastness and retention enhancement, and photodegradation of the herbicide can also be decreased. And the latter is utilized for improving application characteristics, behaviors and physical properties of herbicides and reducing or minimizing unwanted side effects on application.

关键词： adjuvant herbicide surfaotans environmental friendly

Nuclear phylogenomics of angiosperms and insights into their relationships and evolution

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Journal of Integrative Plant Biology 2024年第3期66卷 546-578页

作者： Guojin Zhang hong ma College of Life Sciences Hunan Normal UniversityChangsha 410081China Department of Biology 510 Mueller LaboratoryHuck Institutes of the Life SciencesThe Pennsylvania State UniversityUniversity ParkPA 16802USA

Angiosperms(flowering plants) are by far the most diverse land plant group with over 300,000 species. The sudden appearance of diverse angiosperms in the fossil record was referred to by Darwin as the “abominable mystery,”hence contributing to the heightened interest in angiosperm evolution. Angiosperms display wide ranges of morphological, physiological,and ecological characters, some of which have probably influenced their species richness. The evolutionary analyses of these characteristics help to address questions of angiosperm diversification and require well resolved phylogeny. Following the great successes of phylogenetic analyses using plastid sequences,dozens to thousands of nuclear genes from next-generation sequencing have been used in angiosperm phylogenomic analyses, providing well resolved phylogenies and new insights into the evolution of angiosperms. In this review we focus on recent nuclear phylogenomic analyses of large angiosperm clades, orders, families,and subdivisions of some families and provide a summarized Nuclear Phylogenetic Tree of Angiosperm Families. The newly established nuclear phylogenetic relationships are highlighted and compared with previous phylogenetic results. The sequenced genomes of Amborella,Nymphaea, Chloranthus, Ceratophyllum, and species of monocots, magnoliids, and basal eudicots, have facilitated the phylogenomics of relationships among five major angiosperms clades. All but one of the 64 angiosperm orders were included in nuclear phylogenomics with well resolved relationships except the placements of several orders. Most families have been included with robust and highly supported placements, especially for relationships within several large and important orders and ***, we examine the divergence time estimation and biogeographic analyses of angiosperm on the basis of the nuclear phylogenomic frameworks and discuss the differences compared with previous analyses. Furthermore,we discuss the implicatio

关键词： angiosperms evolution flowering plants nuclear gene phylogenomics phylogeny