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Plants affect the horizontal transmission of a new densovirus infecting the green peach aphid Myzus persicae by modulating honeydew production

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Insect Science 2024年第1期31卷 236-254页

作者： Ya Guo Yani Zhao Yang Yang Yahong Zhang yuying li Honggang Tian Tong-Xian liu Zhaofei li State Key Laboratory of Crop Stress Biology for Arid Areas Key Laboratory of Northwest Loess Plateau Crop Pest Management of Ministry of AgricultureCollege of Plant ProtectionNorthwest A&F UniversityYanglingChina Institute of Entomology and Institute of Plant Health&Medicine Guizhou UniversityGuiyangChina

In a tritrophic context of plant-insect-entomopathogen,plants play important roles in modulating the interaction of insects and their pathogenic ***,the influence of plants on the transmission of insect viruses has been mainly studied on baculoviruses and some RNA viruses,whereas the impact of plants on other insect viruses is largely ***,we identified a new densovirus infecting the green peach aphid Myzus persicae and tested whether and how host plants influence the transmission of the aphid *** complete single-stranded DNA genome of the virus,*** densovirus 2,is 5727 nt and contains inverted terminal *** and phylogenetic analysis indicated that the virus was distinct from other a few identified aphid *** virus abundance was detected highly in the intestinal tract of aphids,compared with the lower level of it in other tissues including head,embryo,and *** and pepper plants had no obvious effect on the vertical transmission and saliva-mediated horizontal transmission of the ***,the honeydew-mediated horizontal transmission among aphids highly depended on host plants(65%on cabbages versus 17%on peppers).Although the virus concentration in the honeydew produced by aphids between 2 plants was similar,the honeydew production of the infected aphids reared on peppers was dramatically *** together,our results provide evidence that plants influence the horizontal transmission of a new densovirus in an aphid population by modulating honeydew secretion of aphids,suggesting plants may manipulate the spread of an aphid-pathogenic densovirus in nature.

关键词： aphids densovirus host plants MpDV2 Myzus persicae transmission

Diarrhea induced by insufficient fat absorption in weaned piglets:Causes and nutrition regulation

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Animal Nutrition 2024年第1期16卷 299-305页

作者： yuying li Pengjun Shi Kang Yao Qian lin Mansheng Wang Zhenping Hou Wenjie Tang Hui Diao Institute of Bast Fiber Crops Chinese Academy of Agricultural Sciences Institute of Subtropical Agriculture Chinese Academy of Sciences Hunan Province Key Laboratory of Animal Nutritional Physiology and Metabolic Process Animal Breeding and Genetics Key Laboratory of Sichuan Province Livestock and Poultry Biological Products Key Laboratory of Sichuan Province Sichuan Animal Science Academy Sichuan Animtech Feed Co. Ltd

Fat is one of the three macronutrients and a significant energy source for piglets. It plays a positive role in maintaining intestinal health and improving production performance. During the weaning period,physiological, stress and diet-related factors influence the absorption of fat in piglets, leading to damage to the intestinal barrier, diarrhea and even death. Signaling pathways, such as fatty acid translocase(CD36), pregnane X receptor(PXR), and AMP-dependent protein kinase(AMPK), are responsible for regulating intestinal fat uptake and maintaining intestinal barrier function. Therefore, this review mainly elaborates on the reasons for diarrhea induced by insufficient fat absorption and related signaling pathways in weaned-piglets, with an emphasis on the intestinal fat absorption disorder. Moreover, we focus on introducing nutritional strategies that can promote intestinal fat absorption in piglets with insufficient fat absorption-related diarrhea, such as lipase, amino acids, and probiotics.

关键词： Weaned piglet Diarrhea Fat absorption Nutrient regulation

Assessment of Meteorological Threats to the Coordinated Search and Rescue of Unmanned/Manned Aircraft

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Meteorological and Environmental Research 2024年第1期15卷 27-29,37页

作者： Fei YAN Chuan li Xiaoyi FU Kefeng WU yuying li Civil Aviation Flight University of China Guanghan 618307China Nanjing University of Aeronautics and Astronautics Nanjing 211106China

The architecture and working principle of coordinated search and rescue system of unmanned/manned aircraft,which is composed of manned/unmanned aircraft and manned aircraft,were first introduced,and they can cooperate with each other to complete a search and rescue ***,a threat assessment method based on meteorological data was proposed,and potential meteorological threats,such as storms and rainfall,can be predicted by collecting and analyzing meteorological ***,an experiment was carried out to evaluate the performance of the proposed method in different *** experimental results show that the coordinated search and rescue system of unmanned/manned aircraft can be used to effectively assess meteorological threats and provide accurate search and rescue guidance.

关键词： Unmanned/manned aircraft Coordinated search and rescue Assessment of meteorological threats Meteorological data

Market Positioning Analysis of CJ Brand Fitness Equipment

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Proceedings of Business and Economic Studies 2024年第2期7卷 89-94页

作者： Bohan liu yuying li Ping Yu Jiayue Zhou Kang Fang Department of Finance and Economics Shandong University of Science and TechnologyJinan 250031Shandong ProvinceChina

CJ Health Technology *** been an export-oriented supplier of fitness equipment,boasting leading technology innovation and manufacturing ***,in the process of expanding into the domestic market,the challenges of unclear market positioning and lack of brand awareness have emerged as major *** address these issues,a SWOT analysis was conducted to explore a suitable market positioning strategy for the CJ *** analysis reveals that the market demand for commercial fitness equipment is relatively saturated,with fierce *** contrast,the home fitness market represents a new blue ocean with promising development opportunities for the CJ *** excellent product quality,stringent quality control measures,and innovation-driven cutting-edge technology,it is recommended that CJ brand fitness equipment target young customers aged between 25 and 35 years ***,vigorously developing the home fitness product line is proposed to capitalize on this burgeoning market segment.

关键词： Fitness equipment Brand planning Market positioning SWOT

全身麻醉及现场快速评价在EBUS-TBNA诊断肺癌中的价值

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中国肺癌杂志 2024年第2期27卷 96-101页

作者：胡雨禾李玉英西南医科大学附属医院呼吸与危重症医学科泸州646000

背景与目的肺癌是常见的呼吸系统恶性肿瘤。超声引导下经支气管针吸活检(endobronchial ultrasound-guided transbronchial needle aspiration,EBUS-TBNA)是诊断肺癌和评估分期的重要工具。EBUS-TBNA大多在局部麻醉或清醒镇静下进行,而... 详细信息

背景与目的肺癌是常见的呼吸系统恶性肿瘤。超声引导下经支气管针吸活检(endobronchial ultrasound-guided transbronchial needle aspiration,EBUS-TBNA)是诊断肺癌和评估分期的重要工具。EBUS-TBNA大多在局部麻醉或清醒镇静下进行,而在全身麻醉下行EBUS-TBNA以及同时应用快速现场评价(rapid on-site evaluation,ROSE)能否进一步提高诊断效能目前仍未可知,本研究拟探索全身麻醉及ROSE在EBUS-TBNA诊断肺癌中的价值。方法回顾性分析164例于2018年1月至2022年12月于西南医科大学附属医院呼吸与危重医学科就诊患者的资料,所有患者术前均疑诊为肺癌并行EBUS-TBNA,根据是否行全身麻醉及ROSE将患者分为局麻组(n=54)、全麻组(n=67)和全麻ROSE组(n=43),分析各组的穿刺情况以及在疾病诊断方面的差异。结果局麻组的淋巴结穿刺针数高于全麻ROSE组(P0.05)。三组中没有患者出现严重并发症及麻醉相关不良反应。结论与局部麻醉联合静脉镇痛镇静相比,全身麻醉下实施EBUS-TBNA无论是否联合ROSE均可得到同样准确的结果,全身麻醉联合ROSE可以减少淋巴结穿刺针数。

关键词：肺肿瘤超声引导下经支气管针吸活检全身麻醉快速现场评价

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退役军人创业行为研究:动因及效果

科研管理 2024年第10期45卷 183-192页

作者：赵家未李玉莹南开大学经济学院天津300071 南京财经大学粮食和物资学院江苏南京210023 南京财经大学现代粮食流通与安全协同创新中心江苏南京210023

促进退役军人积极投身创业创新实践,是实现其自身价值和激发社会经济发展活力的有效途径。本文基于烙印理论,以中国家庭追踪调查(CFPS)2016年、2018年和2020年的数据为样本,采用Probit模型实证探究了从军经历对个人创业选择的影响及退... 详细信息

促进退役军人积极投身创业创新实践,是实现其自身价值和激发社会经济发展活力的有效途径。本文基于烙印理论,以中国家庭追踪调查(CFPS)2016年、2018年和2020年的数据为样本,采用Probit模型实证探究了从军经历对个人创业选择的影响及退役军人创业行为动因。研究表明:(1)从军经历显著增加了退役军人创业的概率,且从军经历对创业收入具有显著正向影响;(2)外部动因表明,不论是主动创业还是被动创业,从军经历均会促进退役军人进行创业,但主动性的增加能够进一步提高退役军人创业的可能性;(3)内在动因表明,胜任能力对退役军人的创业选择不产生显著影响,而较高的生活满意度会抑制退役军人选择创业;(4)家庭动因表明,相较于来自家庭的经济支持,家庭的情感支持更能增加退役军人创业的概率。本研究拓宽了从军经历的研究范畴,丰富了退役军人创业动因的相关研究,为社会和家庭支持退役军人创业提供了实践启示。

关键词：从军经历创业行为生活满意度代际支持情感支持

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外源水杨酸提高珙桐幼苗耐盐性的生理机制

植物生理学报 2024年第7期60卷 1179-1188页

作者：李钰滢胥晓刘沁松西华师范大学生命科学学院西南野生动植物资源保护教育部重点实验室四川南充637009

本研究以珍稀濒危植物珙桐幼苗为材料,探讨了NaCl胁迫下外源水杨酸(SA)对珙桐幼苗的生长、光合色素含量、光合效率、碳水化合物含量及离子稳态的影响。结果表明,珙桐幼苗叶片喷施2mmol·L^(-1)SA能够减轻NaCl胁迫诱导的光抑制,促进生物... 详细信息

本研究以珍稀濒危植物珙桐幼苗为材料,探讨了NaCl胁迫下外源水杨酸(SA)对珙桐幼苗的生长、光合色素含量、光合效率、碳水化合物含量及离子稳态的影响。结果表明,珙桐幼苗叶片喷施2mmol·L^(-1)SA能够减轻NaCl胁迫诱导的光抑制,促进生物量的积累并增强根系活力,增加叶绿素、类胡萝卜素、果糖、葡萄糖和蔗糖含量,提高净光合速率(P_n)、气孔导度(Gs)和蒸腾速率(Tr),降低叶片衰老率、胞间CO_(2)浓度(Ci)和淀粉含量。NaCl胁迫下施用SA可显著减少珙桐幼苗叶片Na^(+)含量,并提高K^(+)含量。相关性分析表明,珙桐幼苗总叶绿素含量、P_n、生物量积累与Na^(+)、Na^(+)/K^(+)呈极显著负相关,与K^(+)呈极显著正相关。可见,盐胁迫下施用SA能够提高珙桐幼苗光合效率和可溶性糖含量,维持离子平衡,进而增强珙桐幼苗的耐盐性。

关键词：珙桐 NaCl胁迫外源水杨酸光合效率

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ESG表现如何影响公司现金持有?

金融理论与实践 2024年第3期 72-81页

作者：曾春华李玉滢海南大学国际商学院海南海口570228

ESG表现会通过影响公司融资约束和代理问题而影响公司的现金持有行为。基于我国沪深两市A股2017—2022年上市公司面板数据,实证检验了ESG表现与公司现金持有的关系。研究发现,良好的ESG表现能够缓解公司的融资约束、降低管理层的在职消... 详细信息

ESG表现会通过影响公司融资约束和代理问题而影响公司的现金持有行为。基于我国沪深两市A股2017—2022年上市公司面板数据,实证检验了ESG表现与公司现金持有的关系。研究发现,良好的ESG表现能够缓解公司的融资约束、降低管理层的在职消费与大股东的资金占用,进而降低公司的现金持有水平,并且这种影响在市场发育相对不完善和分析师跟踪较少的子样本中更加显著。进一步研究发现,良好的ESG表现在降低公司现金持有水平的同时还可以提高公司现金持有价值,增加公司的创新投资支出,优化公司的现金配置。研究揭示了ESG表现影响公司现金持有的具体效应和内在逻辑,有助于为公司进一步加强ESG建设、优化现金管理提供经验证据。

关键词： ESG表现现金持有代理成本融资约束

VUV/UV/NaClO及UV/NaClO去除百里香酚:降解机制及水质影响因素

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高校化学工程学报 2024年第2期38卷 328-340页

作者：袁雨瑾肖习羽李青松李玉瑛吴俊文戴惠林厦门理工学院水资源环境研究所福建厦门361024 五邑大学生物科技与大健康学院广东江门529020 汕头大学海洋灾害预警与防护广东省重点实验室广东汕头515063

采用VUV/UV/NaClO及UV/NaClO工艺去除百里香酚(Tml),对比考察pH、CO_(3)^(2-)、NO_(3)^(-)和腐殖酸(HA)等因素对Tml去除的影响,鉴定识别Tml的降解产物并推测了降解途径,探究VUV/UV/NaClO工艺中反应溶液的急性毒性变化,通过反应溶液组分... 详细信息

采用VUV/UV/NaClO及UV/NaClO工艺去除百里香酚(Tml),对比考察pH、CO_(3)^(2-)、NO_(3)^(-)和腐殖酸(HA)等因素对Tml去除的影响,鉴定识别Tml的降解产物并推测了降解途径,探究VUV/UV/NaClO工艺中反应溶液的急性毒性变化,通过反应溶液组分毒性鉴定评估结合ECOSAR软件模拟识别了毒性较大的产物。结果表明,UV/NaClO和VUV/UV/NaClO工艺中Tml的去除拟一级反应动力学常数kobs均随着pH的增大先减少后增加,且均在pH为7时达到最小,分别为0.183 6 min-1和0.554 7 min-1;CO_(3)^(2-)的存在有利于Tml的去除,在VUV/UV/NaClO工艺中,低浓度NO_(3)^(-)对Tml的去除有轻微抑制作用,高浓度则反之;而在UV/NaClO工艺中,NO_(3)^(-)的存在有利于Tml的去除;HA对Tml的去除有抑制作用。相同条件下不同水质因素对VUV/UV/NaClO工艺的促进或抑制更为显著,约为UV/NaClO工艺的1.05~3.57倍。VUV/UV/NaClO工艺中Tml主要发生了自由基的取代、加成和氧化分解反应,生成了氯代、醌和醛类中间产物。VUV/UV/NaClO处理后的溶液毒性呈先上升后下降再上升的趋势,生成的丙酸乙烯基酯和戊醛类等小分子有机物导致了反应后期反应溶液急性毒性增加。

关键词： VUV/UV/NaClO UV/NaClO 百里香酚(Tml) 水质自由基