Challenges and Enhancement Pathways in County-Level Rural Industry Revitalization: Insights from Ningyang

The development status and development mode of rural industry have been widely concerned by all sectors of the country. Through investigation, it is found that the development of rural industry cannot be achieved without the participation of the party committee, government, enterprises, village collectives, and farmers. Starting from the theory of collaborative governance, this paper takes the rural industry as the main research object and conducts an in-depth exploration of the industrial model, management, radiation, and planning. Through practical case research, three improvement paths are formulated according to the difficulties of industrial development, including collaborative governance mechanism, talent cultivation mechanism, and industrial development mechanism. The focus is on the participation degree of farmers and the distribution of farmers’ interests, so that the rural revitalization results can truly benefit farmers and lead them.

Li^(+)-ion bound crown ether functionalization enables dual promotion of dynamics and thermodynamics for ambient ammonia synthesis

Electrosynthesis of ammonia from the reduction of nitrogen is still confronted with the limited supply of gas reactant in dynamics as well as high activation barrier in thermodynamics.Unfortunately,despite tremendous efforts devoted to electrocatalysts themselves,they still fail to tackle the above two challenges simultaneously.Herein,we employ a heterogeneous catalyst adlayer-composed of crown ethers associated with Li^(+)ions-to achieve the dual promotion of dynamics and thermodynamics for ambient ammonia synthesis.Dynamically,the bound Li^(+)ions interact with the strong quadrupole moment of nitrogen,and trigger considerable reactant flux toward the catalyst.Thermodynamically,Li^(+)associated with the oxygen of crown ether achieves a higher density of states at the Fermi level for the catalyst,enabling effortless electron transfer from the catalysts to nitrogen and thus greatly reducing the activation barrier.As expected,the proof-of-concept system achieves an ammonia yield rate of 168.5μg h^(-1)mg^(-1)and a Faradaic efficiency of 75.3%at-0.3 V vs.RHE.This system-level approach opens up pathways for tackling the two key challenges that have limited the field of ammonia synthesis.

A New Species of Genus Fomitiporia

[Objectives] This study aimed to study the morphological characteristics and molecular phylogeny of a new strain collected from rotten wood of sea buckthorn in Yanbei area of Shanxi Province. [Methods]The specimens were observed with naked eyes. With Melzer,cotton blue and 5% KOH as floating carriers,the slices were prepared,which were observed under a microscope. The ITS sequence of the new strain was compared with those of the 20 kinds of reported fungi to construct molecular phylogenetic tree based on ITS. [Results] The new strain has horseshoe-shaped basidiocarp and pileus shape and has no stipe. Sometimes,it grows procumbently and scrolled backward. The mycelial system is monomitic. The skeletal hyphae showed a negative reaction in the Melzer reagent and cotton blue reagent. The basidiospores are subglobose or spherical and colorless with thick wall. The results of molecular phylogenetic analysis showed that the new strain had a close relationship with Fomitiporia spp. and was clustered into the same branch with them. It formed an independent sub-branch in the phylogenetic tree. [Conclusions] The new strain was identified as a new species of Fomitiporia,named as Fomitiporia yanbeiensis S. Guo & L. Zhou( Gen Bank: KT861405,Fungal name: FN570360).

CEPC Technical Design Report

The Circular Electron Positron Collider(CEPC)is a large scientific project initiated and hosted by China,fostered through extensive collaboration with international partners.The complex comprises four accelerators:a 30 GeV Linac,a 1.1 GeV Damping Ring,a Booster capable of achieving energies up to 180 GeV,and a Collider operating at varying energy modes(Z,W,H,and tt).The Linac and Damping Ring are situated on the surface,while the subterranean Booster and Collider are housed in a 100 km circumference underground tunnel,strategically accommodating future expansion with provisions for a potential Super Proton Proton Collider(SPPC).The CEPC primarily serves as a Higgs factory.In its baseline design with synchrotron radiation(SR)power of 30 MW per beam,it can achieve a luminosity of 5×10^(34)cm^(-2)s^(-1)per interaction point(IP),resulting in an integrated luminosity of 13 ab^(-1)for two IPs over a decade,producing 2.6 million Higgs bosons.Increasing the SR power to 50 MW per beam expands the CEPC's capability to generate 4.3 million Higgs bosons,facilitating precise measurements of Higgs coupling at sub-percent levels,exceeding the precision expected from the HL-LHC by an order of magnitude.This Technical Design Report(TDR)follows the Preliminary Conceptual Design Report(Pre-CDR,2015)and the Conceptual Design Report(CDR,2018),comprehensively detailing the machine's layout,performance metrics,physical design and analysis,technical systems design,R&D and prototyping efforts,and associated civil engineering aspects.Additionally,it includes a cost estimate and a preliminary construction timeline,establishing a framework for forthcoming engineering design phase and site selection procedures.Construction is anticipated to begin around 2027-2028,pending government approval,with an estimated duration of 8 years.The commencement of experiments and data collection could potentially be initiated in the mid-2030s.

开发稳定有机阴离子自由基实现可应用于余辉照明的长持续发光

稳定阴离子自由基的开发在获得高效激基复合物有机超长持续发光材料体系中起到重要作用,但仍然是一个艰巨的挑战.有鉴于此,我们通过提高阴离子自由基的稳定性和降低激基复合物中电荷分离后形成的自由基中间体的再复合速率来开发高效的激基复合物有机长持续发光.我们所开发的激基复合物体系展现出了优异的绿色长持续发光,发光持续时间超过了180分钟.时间分辨的电子顺磁共振测试证实了超长持续发光的获得是因为开发的受体能形成稳定的阴离子自由基和低的自由基阴阳离子再复合速率.将我们所开发的材料应用到发光二极管中,能够制备出智能余辉照明器件.当关闭余辉照明器件的电压180秒后,纸上的英文单词还能被照亮并辨识出来.当前的工作不仅为开发受体材料来实现高效的激基复合物有机长持续发光提供了重要借鉴,也为有机长持续发光在节能余辉照明领域的应用开辟了道路.

Physics design of the HEPS LINAC

Purpose The High Energy Photon Source(HEPS)is a synchrotron radiation source with an ultrahigh brightness and under construction in China.Its accelerator system is comprised of a 6-GeV storage ring,a full energy booster,a 500-meV Linac and three transport lines.With deepening investigations on the physics designs of the storage ring and the booster,the physics scheme of the Linac has evolved through multiple versions.Methods The final version of the Linac,including the electron gun,bunching system and main accelerator,has been deter-mined.The Linac is an s-band normal conducting electron linear accelerator with a very high bunch charge and a large bunch charge range.Results Based on simulations,the Linac could provide electron bunches with charge greater than 8.5-nC,meeting the energy spread and emittance requirements.Conclusions This paper first reviews the evolution and main considerations for different design versions and then describes the physics design and dynamic simulation results of the final scheme in detail.

MDP25 mediates the fine-tuning of microtubule organization in response to salt stress

Microtubules are dynamic cytoskeleton structures playing fundamental roles in plant responses to salt stress.The precise mechanisms by which microtubule organization is regulated under salt stress are largely unknown.Here,we report that Arabidopsis thaliana MICROTUBULE-DESTABILIZING PROTEIN 25(MDP25;also known as PLASMA MEMBRANEASSOCIATED CATION-BINDING PROTEIN 1(PCaP1))helps regulate microtubule organization.Under salt treatment,elevated cytosolic Ca^(2+) concentration caused MDP25 to partially dissociate from the plasma membrane,promoting microtubule depolymerization.When Ca^(2+) signaling was blocked by BAPTA-AM or LaCl_(3),microtubule depolymerization in wild-type and MDP25-overexpressing cells was slower,while there was no obvious change in mdp25 cells.Knockout of MDP25 improved microtubule reassembly and was conducive to microtubule integrity under long-term salt treatment and microtubule recovery after salt stress.Moreover,mdp25 seedlings exhibited a higher survival rate under salt stress.The presence microtubule-disrupting reagent oryzalin or microtubule-stabilizing reagent paclitaxel differentially affected the survival rates of different genotypes under salt stress.MDP25 promoted microtubule instability by affecting the catastrophe and rescue frequencies,shrinkage rate and time in pause phase at the microtubule plus-end and the depolymerization rate at the microtubule minus-end.These findings reveal a role for MDP25 in regulating microtubule organization under salt treatment by affecting microtubule dynamics.

CEPC positron source design

Purpose Circular Electron Positron Collider(CEPC)is a 100-km-ring e+e−collider for a Higgs factory.The injector is composed of a 10-GeV Linac and a 120-GeV Booster.The CEPC Linac is a normal conducting S-band Linac with frequency of 2860 MHz providing electron and positron beams at an energy up to 10 GeV with 100 Hz repetition frequency.The positron source is the most important part of the CEPC Linac,and the bunch charge of positron beam within some cut-off condition should be larger than 3 nC.Methods The positron source of CEPC is composed of a target,a flux concentrator,a capture section,a pre-accelerating section and a beam separation system.Higher positron yield and capture efficiency are the design goal.Based on simulation,the design will be presented and discussed in detail.Result The positron yield at the PSPAS exit is larger than 0.55,and the normalized rms emittance is 2370 mm-mrad with a strict cut-off condition.The detailed simulation results will be presented.Conclusions The design of the positron source including positron production and capture will be presented and can meet the requirements.

Corticosteroid-resistant Sweet’s syndrome as the first manifestation of myelodysplastic/myeloproliferative neoplasm-unclassifiable:a case report

A middle-aged man was diagnosed with myelodysplastic/myeloproliferative neoplasm-unclassifiable(MDS/MPN-U),with severe and extensive corticosteroid-resistant Sweet’s syndrome(SS)as the first manifestation,with evidence of clinical manifestations,pathological description,and laboratory evaluation.The skin lesions continued to spread despite treatment with systemic corticosteroids but were successfully treated with intravenous immunoglobulin(IVIG).