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广东东莞市屠宰场及猪体内沙门氏菌的分离与鉴定

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中国动物检疫 2014年第9期31卷 45-47页

作者：洪伟彬黄炳炽徐振娜黄育浩袁镜乐潘杰东莞市动物疫病预防控制中心广东东莞523086

[目的 ]为了解东莞市屠宰场场地及屠宰猪的沙门氏菌污染情况。[方法 ]东莞市动物疫病预防控制中心从东莞市各镇街屠宰场采集猪肝样品320份,污水水样96份,环境空气样品160份,屠宰用具、工作台、地板等涂抹拭子共96份,进行沙门氏菌的分离... 详细信息

[目的 ]为了解东莞市屠宰场场地及屠宰猪的沙门氏菌污染情况。[方法 ]东莞市动物疫病预防控制中心从东莞市各镇街屠宰场采集猪肝样品320份,污水水样96份,环境空气样品160份,屠宰用具、工作台、地板等涂抹拭子共96份,进行沙门氏菌的分离与鉴定。[结果 ]共分离出沙门氏菌111株,检出率为16.5%。其中从猪肝样品中检出沙门氏菌64株(20%)、空气样品中检出15株(9%)、污水样品中检出22株(10.4%)、器具中检出10株(16.5%)。其中鼠伤寒沙门氏菌31株、肠炎沙门氏菌15株、甲型副伤寒17株。[结论 ]东莞市屠宰猪沙门氏菌污染情况比较普遍,应当引起监管部门的重视。

关键词：污水环境屠宰猪分离鉴定

Early intervention improves clinical responses to seasonal allergic rhinitis by stimulation in sphenopalatine ganglion(Xinwu acupoint)

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Journal of Traditional Chinese Medicine 2023年第4期43卷 787-794页

作者： GUO yuhao huang Liangran ZHANG Lei YANG Wei huang Lixia LIU Wei FAN Yuyan Department of Traditional Chinese Medicine Beijing Tiantan HospitalCapital Medical UniversityBeijing 100050China Beijing Neurosurgical Institute Beijing 100050China Department of Neurosurgery Beijing Tiantan HospitalCapital Medical UniversityBeijing 100050China Department of Radiology Beijing Tiantan HospitalCapital Medical UniversityBeijing 100050China Department of Traditional Chinese Medicine Beijing Tongren HospitalBeijing 100005China

OBJECTIVE:To examine the efficacy of early intervention(4 weeks before pollen dispersal)with sphenopalatine ganglion(Xinwu acupoint)stimulation in patients with allergies after the onset of seasonal allergic rhinitis(SAR).METHODS:This is a prospective,randomized and unblinded half-open ***-one SAR volunteers were randomly assigned to either the sphenopalatine ganglion(SPG)acupuncture plus supplementary acupuncture(SPG group)or the sham-SPG acupuncture plus supplementary acupuncture(SA group)stimulation 4 weeks before the onset of allergy *** changes of the total nasal symptom score(TNSS)and the Rhinoconjunctivitis Quality of Life Questionnaire(RQLQ)scores were measured on the first week in the onset of allergy ***:Four patients dropped out due to local hematoma and pain in the SPG and SA *** remaining 37 patients continued through to the end of the *** early intervention 4 weeks before the onset of allergy season,the sneezing,nasal congestion and itchiness scores in the first week of onset time were significantly lower in the SPG group than in the SA group patients(P<0.001).The RQLQ score obtained at the onset of symptoms indicated that symptoms were more significantly ameliorated in the SPG group than in the SA group(P<0.001).CONCLUSIONS:The results of this study confirmed that early intervention by sphenopalatine ganglion(Xinwu acupoint)stimulation can effectively improve the symptoms and the quality of SAR patients'daily lives.

关键词： rhinitis allergic seasonal acupuncture sphenopalatine Xinwu acupoint early intervention

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隧道运营期衬砌背后空洞检测与治理对策

重庆建筑 2024年第S01期23卷 46-47,51页

作者：蒋志军黄榆皓毛斌斌袁油新重庆市建筑科学研究院有限公司重庆400016 重庆市建设工程质量检验测试中心有限公司重庆400016 西南交通大学土木工程学院四川成都611756

隧道运营期可供检测和后期缺陷治理的时间短,如何准确找出缺陷并快速治理是一个亟待解决的问题。该文依托重庆某隧道工程实例,采用不同方法对空洞进行详细检测,并提出针对性的治理措施。工程实践表明:隧道衬砌背后空洞的检测中,应重点... 详细信息

隧道运营期可供检测和后期缺陷治理的时间短,如何准确找出缺陷并快速治理是一个亟待解决的问题。该文依托重庆某隧道工程实例,采用不同方法对空洞进行详细检测,并提出针对性的治理措施。工程实践表明:隧道衬砌背后空洞的检测中,应重点查明衬砌有效厚度,为后续缺陷治理提供依据,可和敲击法、地质雷达法和钻孔开仓法等方法同步进行;治理方面,灌浆料在本次隧道运营期衬砌背后空洞治理中应用效果良好。可为今后类似隧道缺陷检测和处治提供参考。

关键词：隧道空洞检测处治对策

Blue light-emitting polyfluorenes containing dibenzothiophene-S,S-dioxide unit in alkyl side chain

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Science China Chemistry 2017年第10期60卷 1356-1366页

作者： Yiwen Fang Jie Liu yuhao Zhang Ting Guo Fei huang Wei Yang Yong Cao Institute of Polymer Optoelectronic Materials and Devices State Key Laboratory of Luminescent Materials and Devices South China University of Technology Guangzhou 510640 China

Blue light-emitting polyfluorenes containing dibenzothiophene-S,S-dioxide(SO) unit in alkyl side chain(PF-FSOs and PF-CzSOs) were synthesized. All the polymers show high thermal stability with the decomposition temperatures over400 °C. The highest occupied molecular orbital(HOMO) and the lowest unoccupied molecular orbital(LUMO) energy levels of the copolymer slightly decrease with the increase of SO content in side chain. PL spectra of the polymers show slightly red shift and broadening with the increase of solvent polarities, indicating unremarkable intramolecular charge transfer(ICT) effect in the polymers containing SO unit in alkyl side chain. EL spectra of the polymers are almost unchanged in the current densities from 100 to 400 mA cm.2, indicating the superb EL stability of the resulted polymers. The EL spectra of the copolymers exhibit obvious blue-shift and narrowing with the CIE of(0.18, 0.11) for PF-FSO10 and(0.17, 0.11) for PF-CzSO10, respectively,compared with PF-SO10 containing SO unit in main chain with the CIE of(0.16, 0.17) and PFO with the CIE of(0.18, 0.18).The superior device performances were obtained with the luminous efficiency(LEmax) of 1.17 and 0.68 cd A.1 for PF-FSO15 and PF-CzSO20, respectively, compared with the LEmax of 0.37 cd A.1 for PFO. The results indicate that linking SO unit to alkyl side chain of the polyfluorene is a promising strategy for efficient blue light-emitting polymers.

关键词： dibenzothiophene-S S-dioxide alkyl side chain polyfluorene blue emission polymer light-emitting diode(PLED)

Chemodivergent annulations of allenyl imides andβ,γ-enones switched by nucleophilic phosphine and amine catalysts

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Chinese Chemical Letters 2024年第1期35卷 254-258页

作者： Bingsen Xiang yuhao Wang Chuqing Xiao Fengkai He Yiyong huang Department of Chemistry School of ChemistryChemical Engineering and Life ScienceWuhan University of TechnologyWuhan 430070China Wuhan Britain China School Wuhan 430022China

Nucleophilic phosphine and amine catalyst-switched chemodivergent[4+1]and[3+3]annulations of allenyl imides andβ,γ-enones have been developed,furnishing highly substituted 2-cyclopentenone and 2-pyranone derivatives in moderate to excellent *** plausible reaction mechanisms involving two different ketene intermediates have been proposed to explain the observed ***,by virtue of theα,β-enone substructure of the[4+1]adducts,1,3-dipolar cycloaddition of nitrile imines has been studied in one-pot to provide various fused pyrazoline derivatives.

关键词： Chemodivergent Nucleophilic catalysis Allene Cyclopentenone Pyranone

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3,6-脱水己糖构建方法的研究进展

药学进展 2019年第1期43卷 51-58页

作者：王洪卢路黄宇豪徐进宜谢唯佳吴晓明中国药科大学药物科学研究院江苏南京210009 中国药科大学药学院江苏南京210009

3, 6-脱水己糖是一种独特而重要的糖类物质。在某些天然产物以及化学合成活性小分子中因有3, 6-脱水己糖片段的存在而使其具有特殊的物理化学性质以及生物活性,因此化学家研究了不同方法来构建3, 6-脱水己糖结构。主要介绍近年来3, 6-... 详细信息

3, 6-脱水己糖是一种独特而重要的糖类物质。在某些天然产物以及化学合成活性小分子中因有3, 6-脱水己糖片段的存在而使其具有特殊的物理化学性质以及生物活性,因此化学家研究了不同方法来构建3, 6-脱水己糖结构。主要介绍近年来3, 6-脱水己糖的构建方法及其在类似结构化合物合成上的运用,为研究者在合成此类化合物时提供参考。

关键词： 3,6-脱水己糖活性天然产物化学合成

Carbonized wood with ordered channels decorated by NiCo_(2)O_(4) for lightweight and high-performance microwave absorber

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Journal of Advanced Ceramics 2022年第1期11卷 105-119页

作者： Guangyu QIN Xiaoxiao huang Xu YAN Yunfei HE yuhao LIU Long XIA Bo ZHONG School of Materials Science and Engineering Harbin Institute of TechnologyHarbin 150001China Beijing Institute of Radio Measurement Beijing 100854China School of Materials Science and Engineering Harbin Institute of Technology at WeihaiWeihai 264009China

Wood-derived carbon has a 3D porous framework composed of through channels along the growth direction,which is a suitable matrix for preparing electromagnetic wave(EMW)absorbing materials with low cost,light weight,and environmental ***,the carbonized wood decorated by short cone-like NiCo_(2)O_(4)(NiCo_(2)O_(4)@CW)with highly ordered straight-channel architecture was successfully manufactured through a facile calcination *** horizontal arrangement of the through channels of NiCo_(2)O_(4)@CW(H-NiCo_(2)O_(4)@CW)exhibits a strong reflection loss value of-64.0 dB at 10.72 GHz with a thickness of 3.62 mm and a low filling ratio of 26 wt%(with the density of 0.98 g-cnf3),and the effective absorption bandwidth(EAB)is 8.08 GHz(9.92-18.0 GHz)at the thickness of 3.2 *** excellent microwave absorption(MA)property was ascribed to the ordered-channel structure with abundant interfaces and defects from NiCo_(2)O_(4)@CW,which could promote the interfacial polarization and dipole *** is more,this advantageous structure increased the multiple reflections and *** element analysis(FEA)simulation is carried out to detect the interaction between the prepared material and EMW when the ordered channels are arranged in different *** research provides a low-cost,sustainable,and environmentally friendly strategy for using carbonized wood to fabricate microwave absorbers with strong attenuation capabilities and light weight.

关键词： microwave absorption(MA) wood-derived carbon ordered-channel architecture light weight finite element analysis(FEA)

Near-field wideband beam training for ELAA with uniform circular array

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Science China(Information Sciences) 2024年第6期67卷 370-383页

作者： yuhao CHEN Linglong DAI Department of Electronic Engineering Tsinghua UniversityBeijing National Research Center for Information Science and Technology (BNRist)

Extremely large-scale antenna array(ELAA) at millimeter wave(mmWave) and Terahertz(THz)band has been considered a key technology for combating high attenuation in high-frequency bands in future6G communications. Uniform circular arrays(UCAs) have attracted much attention because of their ability to provide flat beamforming gain at all angles. To realize efficient beamforming, beam training is widely used to acquire channel state information. However, with a large antenna number, the beam training overhead in ELAA systems becomes overwhelming. Moreover, with a large bandwidth, the beam defocus effect severely degrades beam training accuracy. To address these issues, this paper proposes a frequency-dependent focusing(FDF)-based beam training scheme to realize effective beam training in near-field wideband ELAA systems with UCA. Specifically, we first analyze the FDF property of UCA, where signals at different subcarriers can simultaneously focus on different distances. Then, by exploiting the FDF property to search different distances using different subcarriers simultaneously, we design a hierarchical codebook and propose an FDFbased beam training scheme. To reveal the effectiveness of the proposed scheme, we compare its necessary beam training overhead with that of existing schemes. Finally, the simulation results demonstrate that the proposed scheme can achieve accurate beam training in near-field wideband UCA systems with a low beam training overhead.

关键词： extremely large-scale antenna array (ELAA) uniform circular array (UCA) near-field wideband beam training

Enhanced ionic diffusion interface in hierarchical metal-organic framework@layered double hydroxide for high-performance hybrid supercapacitors

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Nano Research 2022年第10期15卷 8983-8990页

作者： Yanan Zhang Junlei Chen Chenyang Su Keyao Chen Huabin Zhang yuhao Yang Wenhuan huang Key Laboratory of Chemical Additives for China National Light Industry College of Chemistry and Chemical EngineeringShaanxi University of Science and TechnologyXi’an 710021China KAUST Catalysis Center King Abdullah University of Science and TechnologyThuwal 23955-6900Kingdom of Saudi Arabia

Layered double hydroxides(LDHs)with abundant accessible active sites are promising electrode materials for hybrid supercapacitor(HSC)due to their ultrahigh theoretical ***,the structural agglomeration of LDH leads to poor rate capability and ***,we construct a diffusion-controlled interface in hierarchical architecture of metal-organic framework(MOF)HKUST-1@cobalt-nickel LDH(denoted as HKUST-1@CoNiLDH)through an in situ etching/electro-deposition *** rapid charge transfer and ionic diffusion in HKUST-1@CoNiLDH deliver a remarkable specific capacity of 297.23 mAh·g^(−1) at 1 A·g^(−1),superior to mostly reported LDH-based *** importantly,the as-prepared HKUST-1@CoNiLDH//activated carbon HSC exhibit a high energy density of 39.8 Wh·kg^(−1) at a power density of 799.9 W·kg^(−1) with an outstanding capacitance retention of 90%after 5,000 charge–discharge *** in-depth understanding of the ionic diffusion among the MOF/LDH interfaces will greatly promote the further development of designing and synthesizing high performance energy conversion and storage devices.

关键词： supercapacitor layered double hydroxides(LDHs) metal-organic framework(MOF) electrodeposition interface