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A novel bat coronavirus with a polybasic furin-like cleavage site

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Virologica Sinica 2023年第3期38卷 344-350页

作者： Wentao Zhu yuyuan huang Jian Gong Lingzhi Dong Xiaojie Yu Haiyun Chen Dandan Li Libo Zhou Jing Yang Shan Lu Department of Infectious Diseases and Clinical Microbiology Beijing Institute of Respiratory Medicine and Beijing Chao-Yang HospitalCapital Medical UniversityBeijing100020China State Key Laboratory of Infectious Disease Prevention and Control National Institute for Communicable Disease Control and PreventionChinese Center for Disease Control and PreventionBeijing102206China Hainan Provincial Center for Disease Control and Prevention Haikou570203China Research Units of Discovery of Unknown Bacteria and Function Chinese Academy of Medical SciencesBeijing100730China

The current pandemic of COVID-19 caused by a novel coronavirus,severe acute respiratory syndrome coronavirus-2(SARS-CoV-2),threatens human health around the world.Of particular concern is that bats are recognized as one of the most potential natural hosts of SARS-CoV-2;however,coronavirus ecology in bats is still nascent.Here,we performed a degenerate primer screening and next-generation sequencing analysis of 112 bats,collected from Hainan Province,China.Three coronaviruses,namely bat betacoronavirus(Bat CoV)CD35,Bat CoV CD36 and bat alpha-coronavirus CD30 were identified.Bat CoV CD35 genome had 99.5%identity with Bat CoV CD36,both sharing the highest nucleotide identity with Bat Hp-betacoronavirus Zhejiang2013(71.4%),followed by SARS-CoV-2(54.0%).Phylogenetic analysis indicated that Bat CoV CD35 formed a distinct clade,and together with Bat Hp-betacoronavirus Zhejiang2013,was basal to the lineage of SARS-CoV-1 and SARS-CoV-2.Notably,Bat CoV CD35 harbored a canonical furin-like S1/S2 cleavage site that resembles the corresponding sites of SARS-CoV-2.The furin cleavage sites between CD35 and CD36 are identical.In addition,the receptor-binding domain of Bat CoV CD35 showed a highly similar structure to that of SARS-CoV-1 and SARS-CoV-2,especially in one binding loop.In conclusion,this study deepens our understanding of the diversity of coronaviruses and provides clues about the natural origin of the furin cleavage site of SARS-CoV-2.

关键词： Bat Coronavirus SARS-CoV-2 Betacoronavirus Furin Cleavage site

玫瑰鲜花饼中四种阿维菌素类药物残留水平分析及慢性膳食风险评估

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食品工业科技 2024年第6期45卷 219-225页

作者：黄玉媛徐幸段吉燕张燕字杰军大理大学公共卫生学院云南大理671000 大理州质量技术监督综合检测中心云南大理671000

为了解玫瑰鲜花饼中是否存在药物残留情况,以及是否存在慢性膳食摄入风险情况。本文通过检测玫瑰鲜花饼中四种阿维菌素类药物的残留情况,对其药物残留进行水平分析,评估其慢性膳食摄入风险。四种药物分别是阿维菌素、多拉菌素、乙酰氨... 详细信息

为了解玫瑰鲜花饼中是否存在药物残留情况,以及是否存在慢性膳食摄入风险情况。本文通过检测玫瑰鲜花饼中四种阿维菌素类药物的残留情况,对其药物残留进行水平分析,评估其慢性膳食摄入风险。四种药物分别是阿维菌素、多拉菌素、乙酰氨基阿维菌素、伊维菌素。共收集了43种玫瑰鲜花饼样品,采用优化的QuEChERS方法对样品进行前处理,并用高效液相色谱-串联质谱仪来测定这4种化合物的残留水平,对它们进行慢性膳食摄入风险评估及风险排序。结果表明,四种阿维菌素类药物标线的判定系数均大于0.99,检出限的范围为0.1~0.7µg/kg,回收率范围为94.97%~102.09%,四种目标化合物只有阿维菌素被检出,检出率是79%,残留量范围为1.89~4.58µg/kg。对四种药物进行食品安全指数分析(IFS),阿维菌素为1.3×10^(-3)、多拉菌素为1.0×10^(-4)、乙酰氨基阿维菌素为1.7×10^(-6)、伊维菌素为1.2×10^(-5);对四种目标化合物进行风险评估,并进行风险排序,四种药物总分均低于50,说明目前鲜花饼中阿维菌素类药物的残留水平不高,风险较低。建议将其纳入食用玫瑰种植过程中农药登记名单并制定相应限量标准。

关键词：膳食摄入风险评估阿维菌素类药物农药残留玫瑰鲜花饼

Studies on Tracheary Element of Several Native Cycad Species in Australia and Two American Plants

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American Journal of Plant Sciences 2022年第1期13卷 147-174页

作者： yuyuan huang Harvey Ottley Yolande Yep Sharon Wilson David Griffiths Nikeeta O’sullivan Yanhua Han Jane Hempel College of Life Sciences Zhongkai University of Agriculture and Engineering Guangzhou China Agricultural College Guangxi University Nanning China George Brown Darwin Botanic Gardens Darwin Australia Palm and Cycad Society of the Northern Territory Darwin Australia School of Environment Charles Darwin University Darwin Australia Research Institute for Environment & Livelihoods Charles Darwin University Darwin Australia

Cycas angulata, Cycas armstrongii and Cycas conferta that are native species of Australia were collected in Darwin city of tropical region, Zamia erosa and angiosperm Guaiacum officinale of Zygophyllaceae which are introduced collected in the Darwin Botanic Gardens, and were carried out light microscope and electron microscope observed research to tracheary element and parenchyma tissue cells of leaflet, rachis and stem. The results showed that there are more vessel elements in their xylems;the length of vessel element of Cycadaceae with Zamiaceae are not obvious difference, the length of vessel element of angiosperm Guaiacum officinale is shorter, but their diameter is smaller, we thought that the characteristics which the length of vessel element is longer and the diameter is bigger are more evolutionary, because thus vessel, their number which interconnected points of possessed perforations’ end walls of vessel element is fewer, and the passageway space is larger so that the conduction speed and quantity are faster and more in unit length range and unit time. These vessels are annular vessels, spiral vessels, scalariform vessels, reticular vessels, pitted vessels and scalariform-pitted vessels, etc. In the transverse section, the vessel elements of Cycadaceae and Zamiaceae are circular, polygonous, more similar to vessel characteristics of leaf and stem of some angiosperms;however, the number of circular vessel of Guaiacum officinale is more, about occupy 35%, others are polygonous. The diameter of vessel is that annular vessel, spiral vessel is least, scalariform vessel or scalariform-reticular vessel is medium, reticular vessel and pitted vessel are the biggest, the characteristic is same as angiosperm. In Cycas conferta, etc. plants often can see several large perforations in the end walls, some species are several big scalarif

关键词： Cycad Evolution Vessel Native Species Structural Characteristics

多系统萎缩患者睡眠质量与焦虑、抑郁及精神病性症状相关性研究

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阿尔茨海默病及相关病杂志 2024年第1期7卷 25-29页

作者：李萌萌黄钰媛黄胜燕复旦大学附属华山医院神经内科上海200040

目的:探讨多系统萎缩(multiple system atrophy,MSA)患者睡眠质量与焦虑、抑郁及精神病性症状的相关性。方法:选取185例MSA患者,按照匹兹堡睡眠质量指数量表(pittsburgh sleep quality index,PSQI)评分分为MSA伴睡眠障碍组(MSA patients... 详细信息

目的:探讨多系统萎缩(multiple system atrophy,MSA)患者睡眠质量与焦虑、抑郁及精神病性症状的相关性。方法:选取185例MSA患者,按照匹兹堡睡眠质量指数量表(pittsburgh sleep quality index,PSQI)评分分为MSA伴睡眠障碍组(MSA patients with sleep disorders,MSA-SD组,PSQI>5分)和MSA不伴睡眠障碍组(MSA patients without sleep disorders,MSA-NSD组,PSQI≤5分)。采用简易智能状态检查量表(mini-mental state examination,MMSE)、额叶功能评定量表(frontal Assessment Battery, FAB)、汉密尔顿焦虑量表(hamilton Anxiety Scale,HAMA)、汉密尔顿抑郁量表(hamilton Depression Scale,HAMD)、神经精神量表(neuropsychiatric Inventory, NPI),轻度行为障碍清单(mild Behavioral Impairment Checklist, MBI-C)分别评估患者的整体认知功能、执行功能、焦虑和抑郁情绪以及精神行为状况,分析MSA患者睡眠质量与认知功能、焦虑和抑郁情绪及异常精神行为的相关性。结果:MSA患者睡眠障碍发生率为48.11%,MSA合并睡眠障碍者的整体认知功能、执行功能比不合并睡眠障碍者差,焦虑和抑郁情绪、精神行为症状比不合并睡眠障碍者严重。单因素分析结果显示,PSQI总评分与年龄、MMSE、FAB均无显著关联,而与NPI总评分、HAMA评分、HAMD、MBI评分呈正相关。多重线性回归分析结果表明,抑郁和异常精神行为是MSA相关睡眠障碍的独立危险因素。结论:睡眠质量下降、焦虑和抑郁、精神行为异常是MSA患者常见的非运动症状,患者的抑郁情绪及精神病性症状是影响其睡眠质量的重要因素。

关键词：多系统萎缩睡眠质量焦虑抑郁精神病性症状

The Application of the Concept of"Nearly Natural"Plant Community in the Optimization of Coastal Ecological Space

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Meteorological and Environmental Research 2021年第3期12卷 66-69页

作者： Zhen YE yuyuan huang Jiahua DONG South China Institute of Environmental Sciences Ministry of Ecology and EnvironmentGuangzhou 510535China College of Agriculture and Biology Zhongkai University of Agriculture and EngineeringGuangzhou 510225China

The overexploitation of the natural environment caused by urbanization makes more and more natural and semi-natural plant communities gradually lack,which causes a lot of irreversible damage to the environment.Therefore,it is very important to carry out ecological environment construction in all fields of urban construction.In this paper,based on theory and method of plant landscape construction under the concept of"nearly natural"plant community,through the investigation and analysis on plant species,distribution,and structural characteristics of plant community in Baguang District of Shenzhen,regional native plant species are summarized,and structural characteristics of original zonal plant community are simulated.The research aims to provide a reference basis for creating a coastal plant landscape with subtropical marine climate for Baguang and even Lingnan,constructing near natural ecological park according to local conditions,forming the pattern well-coordinated with the local natural ecosystem,and carrying out protection of the regional ecological environment.

关键词： "Nearly natural"plant community Coastal space Zonality Baguang of Shenzhen

Comparative Studies of Tracheary Element Structure of Some Gymnosperms with Angiosperms

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American Journal of Plant Sciences 2017年第5期8卷 959-984页

作者： yuyuan huang Yanhua Han Lijun Wei Jiazhuo Wang College of Life Sciences Zhongkai University of Agriculture and Engineering Guangzhou China Agricultural College Guangxi University Nanning China Guangxi Subtropical Institute of Crops Nanning China

Tissues of the pinna and rachis of Cycas diannaensis and pinna, rachis, and root of Cycas taiwaniana, rachis of Cycas szechuanensis, stem of Metasequoia glyptostroboides (Taxodiaceae), stems of Chamaecyparis obtusa (Sieb.et Zucc.) Endl cv. Tetragona (Cupressaceae), and leaves and stems of Michelia alba and Michelia figo and stems of Amygdalus persica (angiosperms) were compared using the scanning electron microscopy. In all species of these gymnosperms, their many tracheary elemnts have perforations in end walls and lateral walls. These structures are the same as vessels of angiosperms;therefore, these tracheary elements are vessel elements. Many types of vessels were found in cycads: pitted vessels in M. glyptostroboides, spiral and pitted vessels in Chamaecyparis obtusa cv. Tetragona. The development and structural characteristics of vessels of cycads, the two other gymnosperms, and the angiosperms were identical. Some characters such as extent of incline of perforation plate in the end wall showed that vessel characters of some angiosperms were more primitive than the cycads or M. glyptostroboides and C. obtusa cv. Tetragona. Many of the vessel elements of the angiosperms were band shaped, without end walls, and had only two lateral walls and other two margins;the end was acuate or with an arc margin;the end of some vessel elements was acute with no perforations, many perforations located only in lateral wall. Such results are rarely reported in previous work. In all species, perforations were seen only in tracheae, and the walls of parenchyma cells only had a thin primary wall and without perforation. Analysis and discussion to the experimental measures which were observed and research of the structure of vessel or tracheid, pointed out that several measures all could be used and the Jeffrey’ method effects were better. Comparing the vessels of cycads, Taxodiaceae and Cupressaceae helps us to understand the mechanism in which these most primitive or more primitive extant gymnosperms were adapted to harsh envi

关键词： Adaptability Gymnosperm Angiosperm Evolution Vessel Structural Characteristics

Structural Characteristics of Vessels in Three Families of Cycadopsida

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Journal of Life Sciences 2010年第7期4卷 1-15页

作者： yuyuan huang Wenbo Liao Xiaoqing Zhong Lijun Wei Hongda Zhang Yuanfeng Lu College of Life Sciences Zhongkai University of Agriclture and Technology Guangzhou 510225 China School of Life Sciences Sun Yat-sen University Guangzhou 510275 China Guangxi Subtropical Institute of Crops Nanning 530001 China Guangxi Institute of Botany Chinese Academy of Sciences Guilin 541006 China Agricultural College Guangxi University Nanning 530005 China

The pinna of Cycas ferruginea F. N. Wei (Cycadaceae), pinnas or rachises of Stangeria eriopus (Kune) Baill. (Stangeriaceae), Dioon holmgrenii De Luca, Sabato & Vazq. Torres, Macrozamia moorei F. Muell. ex C. Moore (Zamiaceae) were macerated and dissociated by Jeffrey’s technique, rinsed with water, dehydrated and gold-plated for observation with scanning electron microscopes. The results showed that the pinna and rachis of the leaf tissues of the four cycad species possess many vessel elements and a few tracheid elements in the conducting tissue of the xylem. Annular, spiral, scalariform, pitted and reticulate vessels and some transitional types, including scalariform-pitted, scalariform-reticulate and reticulate-pitted vessels, were observed in the conducting tissues. The characteristics of the vessels of each species, and the evolutionary relation of four genera of cycads were analyzed. Compared with those of angiosperms, the structural characters of vessels of cycad are at the moderate level of evolution and more advanced than some primitive taxa of angiosperms and ferns. Vessels have been discovered in many genera of ferns, which are even more primitive than cycads. In many ferns, only vessel elements, but no tracheids are found in vascular tissue. In the present study, the authors discovered vessels in different genera of three families of cycads which showed that the existence of vessels in primitive plant taxa is a widespread phenomenon. Vessel elements in vascular tissues of cycads have probably allowed cycads to adapt to various environmental stresses and enabled their persistence over their long evolutionary history. Cycads are the most primitive of the extant seed plants and the widespread existence of vessels in the group has broad implications for plant systematics, evolution and comparative morphology.

关键词：结构特征家庭船舶电子显微镜观察导管分子进化关系蕨类植物植物类群

Study on Plant Diversity of Mountain Areas of Yangmeikeng and Chiao, Shenzhen, China

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American Journal of Plant Sciences 2016年第17期7卷 2527-2552页

作者： Hong Liang yuyuan huang Shizhen Lin Kangsai Zhao Yufeng Zou Xinfan Yu Lijun Yang Wang Xu Zhu Ming Zhibin Zhou Shenzhen Environmental Monitoring Center Shenzhen China College of Life Sciences Zhongkai University of Agriculture and Engineering Guangzhou China

In this study, Yangmeikeng mountain area with a long-term natural restoration status (communities 1, 2, and 3) and Chiao mountain area with an artificially disturbed status (communities 4 and 5) in Shenzhen in China were subjected to plant community composition and diversity statistical analysis on the basis of the following indices: plant height;density;tree layer DBH;coverage;number of family, genus, and species;calculated diversity indices;richness;similarity coefficients of family, genus and species;and species evenness. The diversity levels of each index in each community were compared, and the relationships of family, genus, and species in the communities with one another were determined. The integrated diversity levels in the two areas were also analyzed. Results showed that the composition status of three communities, especially communities 2 and 3, which were located at high elevation, in Yangmeikeng with the long-term natural restoration status was better. The diversity values were also evidently higher. The vegetation composition in Yangmeikeng was also greater than that in Chiao. The integration status of numerous diversity indices, such as evenness and richness, was higher than that of the latter. These data could be used as a basis for arguments regarding the status of natural and artificial forest biodiversities. Many species in the community in artificial forests were shrubs and herbs. The richness and proportion of tree species were distinctly low. Thus, shrubs and herbs were the main components of the artificial interference community. The number and richness of the tree species in natural or long-term natural restoration forests were higher than those of the former. The family diversity Df of the three communities in Yangmeikeng was slightly lower than that of the two communities in Chiao. By contrast, the genus diversity Dg, family richness, and genus richness in Yangmeikeng were higher than those in Chiao. In terms of α-diversity and similarity coefficient, family, genus

关键词： Diversity Community Family Genus Species Ecosystem

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深圳市坝光核坝路生态旅游植物资源分析

热带农业科学 2024年第4期44卷 89-95页

作者：杨志明蒋呈曦余华金黄玉源余欣繁李鑫泰仲恺农业工程学院园艺园林学院广东广州510225 深圳市大鹏新区建筑工务署广东深圳518120 深圳茂森生态科技有限公司广东深圳518120 广东大湾区区域生态环境变化与综合治理国家野外科学观测研究站/国家环境保护快速城市化地区生态环境科学观测研究站/广东省深圳生态环境监测中心站广东深圳518049

为了解深圳市大鹏新区核坝路植物资源状况,基于植物群落结构的调查数据,分析该区域植物资源和植物景观在发展生态旅游上的优势。结果表明,核坝路段共调查记录87科185属238种植物,占大鹏新区植物种类的17.35%,其中红树植物14种(乔木52种... 详细信息

为了解深圳市大鹏新区核坝路植物资源状况,基于植物群落结构的调查数据,分析该区域植物资源和植物景观在发展生态旅游上的优势。结果表明,核坝路段共调查记录87科185属238种植物,占大鹏新区植物种类的17.35%,其中红树植物14种(乔木52种,占所调查植物种类的21.85%;灌木128种,占53.78%;草本82种,占34.45%);植物群落的Simpson物种多样性指数为0.76~0.95,植物资源丰富,乔木层物种数与灌木层物种数呈显著正相关(p<0.01);记录有国家二级保护植物金毛狗、土沉香、润楠、樟,濒危物种银叶树以及二级保护动物香港瘰螈。自然植物群落丰富的生物资源构成了核坝路周边多样、丰富的自然景观,为坝光核坝路沿线发展生态旅游奠定了丰厚的基础。根据调查状况提出开展生态旅游可持续发展对策,在遵循自然规律的前提下,针对目前存在的问题提出保护当地植被和生态系统的改进建议,为实现经济、生态效益双赢的目标策略提供科学依据和理论参考。

关键词：生态旅游植物多样性植物资源生态景观