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自然干燥甜高粱茎秆长期贮藏及乙醇发酵研究

农业工程学报 2011年第12期27卷 250-255页

作者：沈飞梅晓岩曹卫星刘荣厚四川农业大学资源环境学院成都611130 辽宁农业管理干部学院沈阳110161 上海交通大学农业与生物学院生物质能工程研究中心上海200240

为了延长甜高粱乙醇生产原料供应时间,将甜高粱茎秆自然干燥后用于长期贮藏。分别考察干燥和长期贮藏过程糖分变化,结果显示,自然干燥过程中,茎秆的含水率(干基)由80%降低至18%时,总糖损失率为3.85%;不同含水率的茎秆经6个月长期贮藏,... 详细信息

为了延长甜高粱乙醇生产原料供应时间,将甜高粱茎秆自然干燥后用于长期贮藏。分别考察干燥和长期贮藏过程糖分变化,结果显示,自然干燥过程中,茎秆的含水率(干基)由80%降低至18%时,总糖损失率为3.85%;不同含水率的茎秆经6个月长期贮藏,含水率为22%以下茎秆中的总糖和还原糖基本保持不变。表明自然干燥过程使总糖损失较小,22%可作为甜高粱茎秆干燥贮藏的"安全含水率"。通过考察干燥的茎秆乙醇发酵的可行性,结果表明,固态发酵24h即可达到终点,基质中的乙醇质量分数可以达67.06mg/g(干基),发酵过程基本正常。通过该研究,表明自然干燥可作为甜高粱茎秆长期贮藏的一种较为有效的加工方式,可为解决甜高粱乙醇周年生产的原料供应问题提供一定技术参考。

关键词：乙醇发酵干燥甜高粱茎秆长期贮藏

The role of IL-1 in skin inflammation induced by lupus serum

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The role of IL-1 in skin inflammation induced by lupus serum

忙碌董事会、董事高管责任保险与股价崩盘风险:声誉理论抑或忙碌效应

第十一届全国免疫学学术大会

作者： Li xiaoyan Guo Xuanxuan Liu Huicheng Xu Guangqiong fei Xibing Deng Guo-Min Nanjing Medical University

Objectives: Systemic lupus erythematosus(SLE) is a seriously chronic autoimmune disease, which is characterized by a large number of autoantibodies and multiple organ damage. Skin lesion is one of the common clinical manifestations of lupus erythematosus, but its pathogenesis is not clear. IL-1 is a proinflammatory cytokine, and its role in SLE skin lesion is still ***: We used IL-1 receptor deficient mice and other gene deficient mice to study the role of IL-1 in the lupus serum-induced skin inflammation. Results: We found that the severity of skin lesion in IL-1 receptor deficient mice and caspase-1 deficient mice was reduced compared with that in wild type mice. IL-1 receptor deficiency suppressed the expression of FcγRI(CD64) and MHC class II(CD74), and increased the level of FcγRII(CD32) induced by lupus serum. IL-1 receptor deficiency also suppressed the lipid raft clustering and IFN-γ in T cells, and reduced IgG internalization and presentation in macrophage, and decreased expression of MCP-1 and TNFa in monocytes. In addition, TNFa couldpromote the proliferation of ***: Our findings indicate that IL-1 plays an important role in skin lesions of lupus erythematosus. This study suggests IL-1 is a therapeutic target in skin lesions of systemic lupus erythematosus.

关键词： Systemic lupus erythematosus Skin inflammation IL-1 lupus serum

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南方金融 2021年第5期 44-55页

作者：朱晓艳徐飞华侨大学工商管理学院福建泉州362021 安徽师范大学经济管理学院安徽芜湖241000

本文基于声誉理论和忙碌假说,以2007-2019年中国沪深A股上市公司为样本,从企业内外部监督的双重视角出发,实证分析忙碌董事会、董事高管责任保险(以下简称董责险)与上市公司股价崩盘风险三者之间的关系,研究结果表明:第一,董事兼任过多... 详细信息

本文基于声誉理论和忙碌假说,以2007-2019年中国沪深A股上市公司为样本,从企业内外部监督的双重视角出发,实证分析忙碌董事会、董事高管责任保险(以下简称董责险)与上市公司股价崩盘风险三者之间的关系,研究结果表明:第一,董事兼任过多职务会导致精力投入有限、效率低下,不能对企业进行有效监督,增加代理成本,从而加剧股价崩盘风险;第二,董责险能够有效增强董事的责任心,促使忙碌董事加强对企业的监督,从而弱化忙碌董事与股价崩盘风险之间的正向关系;第三,董责险对忙碌董事与股价崩盘风险关系的弱化作用具有异质性,在两职分离、信息透明度较低的企业中更加显著。基于上述研究结论,提出如下几点建议:第一,应理性选聘忙碌董事,兼顾和平衡董事候选人的精力与声誉,降低代理成本从而缓解股价崩盘风险;第二,应重视并充分发挥董责险的外部治理作用,以激发忙碌董事的监督效应,提高公司治理效率。

关键词：声誉理论忙碌效应公司治理董事高管责任保险股价崩盘

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后发国家科技伦理治理的挑战及应对思考

医学与哲学 2024年第22期45卷 19-24页

作者：王晓燕徐飞中国科学技术大学科技哲学系安徽合肥230026

面对新兴科技带来的风险隐患和伦理挑战,处于不同发展阶段和水平的国家面临着不同的治理挑战。后发国家科技发展上“后发优势”与“低技术陷阱”并存的特点,导致在科技伦理治理上面临着现代化路径选择的两难困境、发达国家的伦理倾销、... 详细信息

面对新兴科技带来的风险隐患和伦理挑战,处于不同发展阶段和水平的国家面临着不同的治理挑战。后发国家科技发展上“后发优势”与“低技术陷阱”并存的特点,导致在科技伦理治理上面临着现代化路径选择的两难困境、发达国家的伦理倾销、资本对科技的介入失范以及科技伦理治理研究相对滞后等多重挑战。作为世界上最大的后发国家,中国在实践上以负责任自主创新破解道路之难、以全球化科技伦理治理方案破解利益之难、通过完善伦理审查制度破解机制之难、加强科技伦理研究与教育破解理论之难,从而实现伦理治理的弯道超越,是有效应对挑战的可行之策。

关键词：后发国家科技伦理伦理治理

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铝锂合金激光填丝焊接接头组织性能研究

稀有金属材料与工程 2011年第10期40卷 1775-1779页

作者：许飞陈俐巩水利李晓延杨璟北京航空制造工程研究所北京100024 北京工业大学北京100124

利用激光填丝焊接方法对5A90铝锂合金薄板焊接头的组织性能进行了研究。结果表明:激光填丝焊接头的主要组织特征为细晶层和焊缝区大范围等轴晶,与激光焊接头类似,而不同之处表现为激光填丝焊接头的显微组织相对细化,柱状晶区范围相对减... 详细信息

利用激光填丝焊接方法对5A90铝锂合金薄板焊接头的组织性能进行了研究。结果表明:激光填丝焊接头的主要组织特征为细晶层和焊缝区大范围等轴晶,与激光焊接头类似,而不同之处表现为激光填丝焊接头的显微组织相对细化,柱状晶区范围相对减小。激光填丝焊缝区硬度HV0.2(925.7MPa)略低于激光焊缝区硬度(956.5MPa),但前者硬度分布更加均匀。激光填丝焊接头的抗拉强度稍低于激光焊接头,分别达母材的79.22%和73.03%,但其断后延伸率却显著高于后者,分别达母材的38.65%和20.38%。综上所述,5A90铝锂合金激光填丝焊接头的组织性能略优于激光焊接头,若使激光填丝焊接头的综合力学性能达到使用要求,不仅需要焊后热处理强化,还需要与母材匹配性更好的焊丝。

关键词：铝锂合金激光焊激光填丝焊组织拉伸性能

Nectar and Pollen Sources for Honeybee （Apis cerana cerana Fabr.） in Qinglan Mangrove Area, Hainan Island, China

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Journal of Integrative Plant Biology 2006年第11期48卷 1266-1273页

作者： Yi-Feng Yao Subir Bera Yu-fei Wang Cheng-Sen Li State Key Laboratory of Systematic and Evolutionary Botany Institute of Botany the Chinese Academy of Sciences Beijing 100093 China Department of Botany University of Calcutta Kolkata 700019 India Graduate School the Chinese Academy of Sciences Beijing 100039 China Beijing Museum of Natural History Beijing 100050 China

In the present study, nectar and pollen sources for honeybee （Apls cerana cerana Fabr.） were studied in Qlnglan mangrove area, Hainan Island, China, based on microscopic analysis of honey and pollen load （corblcular and gut contents） from honeybees collected In October and November 2004. Qualitative and quantitative melittopalynologlcal analysis of the natural honey sample showed that the honey is of unlfloral type with Mimosa pudlca L. （Mlmosaceae） as the predominant （89.14%） source of nectar and pollen for A. cerana cerana In October. Members of Araceae are an Important minor （3%-15%） pollen type, whereas those of Arecaceae are a minor （〈3%） pollen type. Pollen grains of Nypa fruticans Wurmb., Rhlzophora spp., Excoecarla agallocha L., Lumnitzera spp., Brugulera spp., Kandella candel Druce, and Ceriops tagal （Perr.） C. B. Rob. are among the notable mangrove texa growing In Qinglan mangrove area recorded as minor taxa In the honey. The absolute pollen count （I.e. the number of pollen grains/10 g honey sample） suggests that the honey belongs to Group V （〉1 000 000）. Pollen analysis from the corblcular and gut contents of A. cerana cerana revealed the highest representation （95.60%） of members of Sonneratia spp. （Sonneratlaceae）, followed by Bruguiera spp. （Rhizophoraceae）, Euphorblaceae, Poaceae, Fabaceae, Arecaceae, Araceae, Anacardlaceae, and Rublaceae. Of these plants, those belonging to Sonneratla plants are the most Important nectar and pollen sources for A. cerana cerana and are frequently foraged and pollinated by these bees in November.

关键词： Hainan Island honeybee mangrove nectar and pollen sources.

Serum Microcystin-LR Levels Linked with Risk of Inflammatory Bowel Disease:A Matched Case-Control Study in China

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Environment & Health 2024年第7期2卷 453-464页

作者： Xuejie Chen Wenya Liu Yangjie Liao Xin Xiang Yue Yang Li Tian Xiang Gao Qian Cao Hong Guo Kang Chao Fengmei Song Rongbei Liu Ying Li Shuyu Ye Jiangang Wang fei Yang xiaoyan Wang Department of Gastroenterology Third Xiangya HospitalCentral South UniversityChangsha410013China Hunan Province Key Laboratory of Typical Environmental Pollution and Health Hazards School of Public HealthHengyang Medical SchoolUniversity of South ChinaHengyang421001China Hunan Provincial Key Laboratory of Clinical Epidemiology Xiangya School of Public HealthCentral South UniversityChangsha410078China Department of Gastroenterology the Sixth Affiliated HospitalSun Yat-sen UniversityGuangzhou510510China Department of Gastroenterology Sir Run Run Shaw HospitalCollege of MedicineZhejiang UniversityHangzhou310018China Department of Gastroenterology Chongqing General HospitalUniversity of Chinese Academy of SciencesChongqing401121China

Microcystin-LR(MC-LR),the most prevalent and diverse cyanotoxin produced by harmful cyanobacterial blooms,has been linked to gastrointestinal ***,we conducted a case-control study across four regions in China to investigate this *** bowel disease(IBD)cases(219)were matched with healthy controls(438)based on age and gender and conditional logistic regression models and Restricted cubic splines were used to evaluate the association between MC-LR exposure and IBD *** used quantitative real-time polymerase chain reaction to measure the expression levels of inflammatory *** levels of protein expression in the colorectum were determined using Western blotting(WB).Compared to the lowest quartile of serum MC-LR levels,the adjusted odds ratios and 95%confidence intervals(CI)for the highest quartiles of serum MC-LR levels were 5.51(2.70,11.21).The RCS was shown the association between serum MC-LR levels and IBD risk was nonlinear(Pnonlinear<0.001).In the animal experiments,MC-LR resulted in colorectal injury via the PI3K/AKT signaling *** study provides the evidence that serum MC-LR exposure is significantly associated with the risk of IBD in *** study results indicate that MC-LR probably causes IBD via the PI3K/AKT signaling pathway.

关键词： Microcystin-LR IBD Nonlinearity Case-Control Study Restricted Cubic Splines

Expert consensus on endodontic therapy for patients withsystemic conditions

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International Journal of Oral Science 2024年第3期16卷 390-397页

作者： Xin Xu Xin Zheng fei Lin Qing Yu Benxiang Hou Zhi Chen Xi Wei Lihong Qiu Wenxia Chen Jiyao Li Lili Chen Zuomin Wang Hongkun Wu Zhiyue Lu Jizhi Zhao Yuhong Liang Jin Zhao Yihuai Pan Shuang Pan xiaoyan Wang Deqin Yang Yanfang Ren Lin Yue Xuedong Zhou State Key Laboratory of Oral Diseases&National Clinical Research Center for Oral Diseases&Department of Cariology and Endodontics West China Hospital of StomatologySichuan UniversityChengduChina Department of Cariology and Endodontology Peking University School and Hospital of Stomatology&National Clinical Research Center for Oral Diseases&National Engineering Research of Oral Biomaterials and Digital Medical Devices&Beijing Key Laboratory of Digital StomatologyPeking UniversityBeijingChina State Key Laboratory of Oral&Maxillofacial Reconstruction and Regeneration National Clinical Research Center for Oral DiseasesShaanxi Key Laboratory of Oral DiseasesDepartment of Operative Dentistry&EndodonticsSchool of StomatologyThe Fourth Military Medical UniversityXi’anChina Center for Microscope Enhanced Dentistry Beijing Stomatological HospitalCapital Medical UniversityBeijingChina State Key Laboratory of Oral&Maxillofacial Reconstruction and Regeneration Key Laboratory of Oral Biomedicine Ministry of EducationHubei Key Laboratory of StomatologySchool&Hospital of StomatologyWuhan UniversityWuhanChina Department of Operative Dentistry and Endodontics Hospital of StomatologyGuanghua School of StomatologySun Yat-Sen University&Guangdong Provincial Key Laboratory of StomatologyGuangzhouChina Department of Endodontics School of StomatologyChina Medical UniversityShenyangChina College&Hospital of Stomatology Guangxi Medical UniversityNanningChina Department of Stomatology Union HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhanChina Department of Stomatology Beijing Chaoyang HospitalCapital Medical UniversityBeijingChina State Key Laboratory of Oral Diseases&National Center for Stomatology&National Clinical Research Center for Oral Diseases&Department of Geriatric Dentistry West China Hospital of StomatologySichuan UniversityChengduChina Beijing Hospital National Center of GerontologyBeijingChina Department of Stomatology Peking Union Medical College Hospit

The overall health condition of patients significantly affects the diagnosis, treatment, and prognosis of endodontic diseases. Asystemic consideration of the patient’s overall health along with oral conditions holds the utmost importance in determining thenecessity and feasibility of endodontic therapy, as well as selecting appropriate therapeutic approaches. This expert consensus is acollaborative effort by specialists from endodontics and clinical physicians across the nation based on the current clinical evidence,aiming to provide general guidance on clinical procedures, improve patient safety and enhance clinical outcomes of endodontictherapy in patients with compromised overall health.

关键词： patients diagnosis prognosis

基于Exergy研究的地源热泵降温系统性能分析

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农业机械学报 2009年第2期40卷 146-150页

作者：柴立龙马承伟袁小艳张义余飞中国农业大学水利与土木工程学院北京100083 中科华誉能源技术发展有限公司北京100080

以地下水式地源热泵系统在农业温室和办公楼中的夏季降温研究为例,归纳出地源热泵降温系统的能量利用质量模型——Exergy分析模型,以Exergy损失Edest和Exergy效率ε为评价指标对降温工况下系统及其组成单元的热力学性能进行分析和探讨... 详细信息

以地下水式地源热泵系统在农业温室和办公楼中的夏季降温研究为例,归纳出地源热泵降温系统的能量利用质量模型——Exergy分析模型,以Exergy损失Edest和Exergy效率ε为评价指标对降温工况下系统及其组成单元的热力学性能进行分析和探讨。分析结果表明:蒸发器的Exergy效率达到92.5%,具有较高的能源利用质量;冷凝器的Exergy效率相对较小,Exergy损失较大,不可逆性大;总体来看,系统的Exergy效率较低。与此同时,试验期间地源热泵机组和系统的制冷性能系数分别为5.90和3.56。

关键词：地源热泵降温可用能性能系数