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Particuology 2020年第4期18卷 10-17页

作者： menghua tian Jianwei Guo Zhi Wang Jianwei Cao Xuzhong Gong Key Laboratory of Green Process and Engineering National Engineering Laboratory for Hydrometallurgical Cleaner Production TechnologyInstitute of Process EngineeringChinese Academy of SciencesBeijing 100190China School of Chemical Engineering University of Chinese Academy of SciencesBeijing 100049China

In this study,the gas-liquid reactive crystallization of LiCl-NH3·H2O-CO2 was adopted to produce *** weakly alkaline nature of NH3·H2O in the absence of any recarbonation process resulted in a unimodal and easily controllable particle size distribution(PSD)of the obtained *** reaction temperature significantly influenced both the Li2CO3 particle size and *** increasing the temperature from 25 to 60℃,the volume weighted mean particle size increased from 50.5 to 100.5μm,*** Li2CO3 secondary nucleation rate and growth rate were obtained by focused beam reflectance measurements and a laser particle size analyzer,*** secondary nucleation rate of Li2CO3 reduced as a function of temperature,whereas the growth rate *** addition to improving the surface energy of the crystals to enhance the growth process,higher temperatures also reduced the supersolubility of Li2CO3,which also plays a role to decrease the secondary nucleation *** a constant temperature,supersaturation affects the Li2CO3 particle size through the synergistic effect of secondary nucleation and ***,with improved supersaturation,the mean particle size of Li2CO3 *** results provide a meaningful way to evaluate the crystallization process and to regulate the particle size.

关键词： Li2CO3 Gas-liquid reactive crystallization Particle size distribution Supersaturation Secondary nucleation Growth rate

电感耦合等离子体原子发射光谱(ICP-AES)法测定胡蜂酒中无机元素

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中国无机分析化学 2022年第1期12卷 155-162页

作者：李秀林田先娇田孟华郭云胶杨新周瑞丽海关云南瑞丽678600 德宏师范高等专科学校民族医药研究所云南芒市678400 昭通市天麻研究院云南昭通657000 德宏师范高等专科学校理工学院云南芒市678400

采用电感耦合等离子体原子发射光谱法测定胡蜂酒中20种无机元素,建立无机元素对照指纹图谱,对重金属元素进行风险评估。结果表明,胡蜂酒中无机元素种类丰富,其中P、K、Na元素占测定总元素的96.14%。有害元素Pb、Cd、As、Hg、Cu含量符合... 详细信息

采用电感耦合等离子体原子发射光谱法测定胡蜂酒中20种无机元素,建立无机元素对照指纹图谱,对重金属元素进行风险评估。结果表明,胡蜂酒中无机元素种类丰富,其中P、K、Na元素占测定总元素的96.14%。有害元素Pb、Cd、As、Hg、Cu含量符合国家药典标准要求,Cu的靶标危险系数(THQ)为1.00×10^(-2),THQ<1说明摄入的重金属对人体健康造成的影响不明显。不同产区胡蜂酒金属元素含量存在差异,根据金属元素图谱得出元素含量按原子序数顺序出现相似的分布态势。结果表明,胡蜂酒中含有丰富的金属元素,很多为营养微量元素,有害元素(Pb、Cd、As、Hg、Cu)含量符合药典要求,从金属元素方面单一来看,饮用胡蜂酒没有明显的健康风险。胡蜂酒无机元素指纹图谱可为胡蜂酒的鉴别提供一定的的参考依据。

关键词：胡蜂酒无机元素指纹图谱健康风险评价

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胡蜂酒中游离氨基酸多样性分析

中国食品添加剂 2022年第5期33卷 169-178页

作者：田先娇邱勇刘贵有田孟华党凌婧马艳粉郭云胶杨新周德宏师范高等专科学校民族医药研究所芒市678400 德宏师范高等专科学校理工学院芒市678400 德宏职业学院芒市678400 昭通市天麻研究院昭通657000

以16个不同产区金环胡蜂浸制胡蜂酒为研究对象,通过测定其游离氨基酸组成及含量,并采用相关性分析、主成分分析、聚类分析、综合打分评价,明确胡蜂酒游离氨基酸组成多样性及含量。结果表明,胡蜂酒中含有22种游离氨基酸,必需氨基酸、非... 详细信息

以16个不同产区金环胡蜂浸制胡蜂酒为研究对象,通过测定其游离氨基酸组成及含量,并采用相关性分析、主成分分析、聚类分析、综合打分评价,明确胡蜂酒游离氨基酸组成多样性及含量。结果表明,胡蜂酒中含有22种游离氨基酸,必需氨基酸、非必需氨基酸、药用氨基酸、总氨基酸平均含量为649.72、1068.97、841.55、1718.69mg/L。胡蜂酒中四类呈味氨基酸含量由高到低依次为甜味氨基酸、苦味氨基酸、鲜味氨基酸、芳香族氨基酸,含量分别为472.09、451.67、372.03、144.78mg/L。游离氨基酸成分中提取出4个主成分,贡献率达到87.372%,能较好的反映胡蜂酒中氨基酸的综合信息。以16个不同产区,22个游离氨基酸指标含量进行聚类分析,可将胡蜂酒分为4类,聚类分析结果和综合评分结果相似。主要与所含游离氨基酸含量关联性较强,游离氨基酸含量的高低与不同产区金环胡蜂生长的环境(气候、海拔、生物多样性等),食物的多样性密切相关。本研究结果可为下一步金环胡蜂的繁育、胡蜂酒的制作及开发奠定基础,为胡蜂酒的呈味机制、药理研究奠定科学基础。

关键词：胡蜂酒不同产区游离氨基酸多样性

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Adaptive Proportional-Derivative Sliding Mode Control Law With Improved Transient Performance for Underactuated Overhead Crane Systems

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IEEE/CAA Journal of Automatica Sinica 2018年第3期5卷 683-690页

作者： menghua Zhang Xin Ma Rui Song Xuewen Rong Guohui tian Xincheng tian Yibin Li School of Control Science and Engineering Shandong University

In this paper, an adaptive proportional-derivative sliding mode control(APD-SMC) law, is proposed for 2D underactuated overhead crane systems. The proposed controller has the advantages of simple structure, easy to implement of PD control, strong robustness of SMC with respect to external disturbances and uncertain system parameters, and adaptation for unknown system dynamics associated with the feedforward parts. In the proposed APD-SMC law, the PD control part is used to stabilize the controlled system, the SMC part is used to compensate the external disturbances and system uncertainties,and the adaptive control part is utilized to estimate the unknown system parameters. The coupling behavior between the trolley movement and the payload swing is enhanced and, therefore, the transient performance of the proposed controller is *** Lyapunov techniques and the La Salle's invariance theorem are employed in to support the theoretical derivations. Experimental results are provided to validate the superior performance of the proposed control law.

关键词： Adaptability adaptive proportional-derivative sliding mode control(APD-SMC) coupling behavior La Salle’s invariance theorem Lyapunov techniques robustness underactuated overhead crane

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蜜环菌菌索抗氧化作用初步研究

云南化工 2017年第1期44卷 14-17页

作者：杜刚田孟华高路詹梦涛李干鹏云南民族大学民族药资源化学国家民族事务委员会-教育部重点实验室昆明650500 昭通市天麻研究院云南昭通657000

以芦丁为对照,从活性氧自由基清除效果及对DPPH自由基清除能力等方面对云南昭通蜜环菌乙醇提取物的抗氧化活性进行实验研究。结果表明:云南昭通蜜环菌乙醇提取物对光照核黄素自氧化产生的超氧阴离子、Fenton反应产生的羟自由基和DPPH自... 详细信息

以芦丁为对照,从活性氧自由基清除效果及对DPPH自由基清除能力等方面对云南昭通蜜环菌乙醇提取物的抗氧化活性进行实验研究。结果表明:云南昭通蜜环菌乙醇提取物对光照核黄素自氧化产生的超氧阴离子、Fenton反应产生的羟自由基和DPPH自由基均有一定的清除作用,对DPPH·的清除率最高,而对超氧阴离子的清除能力较低。

关键词：蜜环菌乙醇提取物抗氧化

Redirecting dynamic structural evolution of nickel-contained RuO_(2) catalyst during electrochemical oxygen evolution reaction

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Journal of Energy Chemistry 2022年第6期31卷 330-337,I0009页

作者： Yuhan Zhao menghua Xi Yanbin Qi Xuedi Sheng Pengfei tian Yihua Zhu Xiaoling Yang Chunzhong Li Hongliang Jiang Shanghai Engineering Research Center of Hierarchical Nanomaterials School of Materials Science and EngineeringEast China University of Science and TechnologyShanghai 200237China Key Laboratory for Ultrafine Materials of Ministry of Education School of Chemical EngineeringEast China University of Science and TechnologyShanghai 200237China School of Mechanical and Power Engineering East China University of Science and TechnologyShanghai 200237China

Electrochemical oxygen evolution reaction (OER) is a main efficiency bottleneck of water *** ruthenium oxide (RuO_(2)) catalyst displays remarkable activities but poor stability for *** instability stems from lattice oxygen oxidation,resulting in the oxidation of Ru^(4+) to soluble Ru^(4+)(x>4) ***,we redirect dynamic structural evolution of Ru-based catalysts through introducing oxidized nickel (Ni) *** virtue of comprehensive structural characterizations,such as high-angle annular dark-field scanning transmission electron microscopy (HAADF-STEM),X-ray photoelectron spectroscopy (XPS),operando Raman and so forth,it is demonstrated that when the atomic content of Ni exceeds that of ruthenium (Ru),the Ni components can efficiently inhibit the Ru^(4+) oxidation and structural *** functional theory (DFT) calculations suggest that the introduction of Ni component hinders the formation of oxygen vacancies,and makes lattice oxygen mediated mechanism turn to adsorbate evolution mechanism,which eventually improves the *** optimized nickel-contained RuO_(2) catalyst delivers an effective reactivity with an overpotential of less than 215 m V to attain 10 m A cm^(-2) and remarkable stability with only 5 mV increment after 5000 potential *** work provides insights into the origin of dynamic structural evolution of transition-metalmodified RuO_(2) electrocatalysts.

关键词： Oxygen evolution reaction Ruthenium Structure evolution Electrocatalysis Operando Raman

A Hybrid CNN for Image Denoising

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Journal of Artificial Intelligence and Technology 2022年第3期2卷 93-99页

作者： menghua Zheng Keyan Zhi Jiawen Zeng Chunwei tian Lei You School of Software Northwestern Polytechnical UniversityXi’anShaanxi 710129China Research&Development Institute of Northwestern Polytechnical University in Shenzhen Shenzhen 518057China Yangtze River Delta Research Institute Northwestern Polytechnical UniversityTaicang 215400China School of Biomedical Informatics University of Texas Houston Science Center at HoustonHoustonTX 77030USA

Deep convolutional neural networks(CNNs)with strong learning abilities have been used in the field of image ***,some CNNs depend on a single deep network to train an image denoising model,which will have poor performance in complex *** address this problem,we propose a hybrid denoising CNN(HDCNN).HDCNN is composed of a dilated block(DB),RepVGG block(RVB),feature refinement block(FB),and a single *** combines a dilated convolution,batch normalization(BN),common convolutions,and activation function of ReLU to obtain more context *** uses parallel combination of convolution,BN,and ReLU to extract complementary width *** is used to obtain more accurate information via refining obtained feature from the RVB.A single convolution collaborates a residual learning operation to construct a clean *** key components make the HDCNN have good performance in image *** shows that the proposed HDCNN enjoys good denoising effect in public data sets.

关键词： CNN dilated convolutions image denoising RepVGG

不同等级昭通乌天麻与其他产地天麻的天麻素含量测定及比较

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中国现代中药 2015年第1期17卷 35-38页

作者：刘旭燕张公信田孟华张昌飞余显伦郭友刚刘大会昭通市天麻研究院云南昭通657000 昭通市天麻特产局云南昭通657000 云南省农业科学院药用植物研究所云南昆明650205

目的:测定不同等级、不同产地天麻中天麻素的含量。方法:采用HPLC测定天麻中天麻素含量。Inert Sustain C18色谱柱(4.6 mm×250 mm,5μm);流动相:乙腈-0.05%磷酸(3∶97);流速:1.0 m L·min-1;检测波长:220 nm;柱温为室温。结果:不同等... 详细信息

目的:测定不同等级、不同产地天麻中天麻素的含量。方法:采用HPLC测定天麻中天麻素含量。Inert Sustain C18色谱柱(4.6 mm×250 mm,5μm);流动相:乙腈-0.05%磷酸(3∶97);流速:1.0 m L·min-1;检测波长:220 nm;柱温为室温。结果:不同等级的乌天麻中,天麻等级越高天麻素含量越高。一等乌天麻中天麻素含量为0.82%,而四等乌天麻含量仅为0.32%。而不同产地同一等级的红天麻中天麻素含量差异较大。其中,安徽大别山天麻中天麻素含量最高,为0.94%;湖北宜昌、陕西洋县两个产地天麻中天麻素含量分别为0.66%、0.60%,云南丽江和大姚天麻中天麻素含量较低,仅为0.45%和0.44%。结论:不同的等级和不同的产地对天麻中天麻素的含量均有影响。

关键词：天麻天麻素 HPLC法含量测定

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缺血性脑卒中与相关基因多态性的研究进展

中国卫生标准管理 2017年第1期8卷 139-142页

作者：施蕊胡钊余显伦何海燕张昌飞田孟华杨为民王涛昆明医科大学药学院暨云南省天然药物药理重点实验室云南昆明650500 昆明医科大学第一附属医院心内科云南昆明650500 昭通市天麻研究院云南昭通657000 南京大学医学院附属鼓楼医院心胸外科江苏南京210008

缺血性卒中(IS)是脑血管疾病的常见类型,目前尚缺乏有效的治疗措施,以预防缺血性脑卒中为主。即从基因水平早期对健康人群筛查,对相关遗传易感人群进行干预。与缺血性脑卒中相关候选的基因包括:脂代谢相关基因;同型半胱氨酸及代谢酶基因... 详细信息

缺血性卒中(IS)是脑血管疾病的常见类型,目前尚缺乏有效的治疗措施,以预防缺血性脑卒中为主。即从基因水平早期对健康人群筛查,对相关遗传易感人群进行干预。与缺血性脑卒中相关候选的基因包括:脂代谢相关基因;同型半胱氨酸及代谢酶基因;肾素-血管紧张素-醛固酮系统基因;环加氧酶基因;一氧化氮合酶基因;炎症反应相关因子基因等。

关键词：缺血性脑卒中基因多态性候选基因

A cytochrome c551 mediates the cyclic electron transport chain of the anoxygenic phototrophic bacterium Roseiflexus castenholzii

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Plant Communications 2024年第2期5卷 79-93页

作者： Lu Yu Zhenzhen Min menghua Liu Yueyong Xin Aokun Liu Jian Kuang Wenping Wu Jingyi Wu Huimin He Jiyu Xin Robert EBlankenship Changlin tian Xiaoling Xu Department of Biochemistry and Molecular Biology School of Basic Medical Sciences and Affiliated HospitalKey Laboratory of Aging and Cancer Biology of Zhejiang ProvinceHangzhou Normal UniversityHangzhou 311121China High Magnetic Field Laboratory Chinese Academy of SciencesHefei 230031China Photosynthesis Research Center College of Life and Environmental SciencesHangzhou Normal UniversityHangzhou 311121China The First Affiliated Hospital of USTC Division of Life Sciences and MedicineCenter for Bioanalytical ChemistryHefei National Laboratory of Physical Science at MicroscaleUniversity of Science and Technology of ChinaHefei 230026China Departments of Biology and Chemistry Washington University in St.LouisSt.LouisMO 63130USA

Roseiflexus castenholzii is a gram-negativefilamentous phototrophic bacterium that carries out anoxygenic photosynthesis through a cyclic electron transport chain(ETC).The ETC is composed of a reaction center(RC)–light-harvesting(LH)complex(rcRC–LH);an alternative complex III(rcACIII),which functionally re-places the cytochrome bc1/b6f complex;and the periplasmic electron acceptor auracyanin(rcAc).Although compositionally and structurally different from the bc1/b6f complex,rcACIII plays similar essential roles in oxidizing menaquinol and transferring electrons to the ***,rcACIII-mediated electron transfer(which includes both an intraprotein route and a downstream route)has not been clearly elucidated,nor have the details of cyclic ***,we identify a previously unknown monoheme cytochrome c(cyt c551)as a novel periplasmic electron acceptor of *** reduces the light-excited rcRC–LH to complete a cyclic *** also reveal the molecular mechanisms involved in the ETC using electron paramagnetic resonance(EPR),spectroelectrochemistry,and enzymatic and structural *** that electrons released from rcACIII-oxidized menaquinol are transferred to two alternative periplasmic electron acceptors(rcAc and cyt c551),which eventually reduce the rcRC to form the complete cyclic *** work serves as a foundation for further studies of ACIII-mediated electron transfer in anoxygenic photosynthesis and broadens our under-standing of the diversity and molecular evolution of prokaryotic ETCs.

关键词： cytochrome c menaquinol oxidoreductase electron transport chain electron paramagnetic reso-nance light-harvesting complex