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纳米石墨烯片—石蜡复合相变蓄冷材料制备方法及热物性研究

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食品与机械 2016年第12期32卷 128-132页

作者：高茂条王春煦吴学红王燕令苏震郑州轻工业学院能源与动力工程学院河南郑州450002

纳米石墨烯材料由于其良好的热物性已成为研究热点。文章以纳米石墨烯片为填料,通过机械法和化学改性法,得出在纳米石墨烯片—石蜡复合相变材料的分散体系中聚酯型超分散剂的最佳添加量为2%。试验通过沉淀、分离得到复合相变材料的稳定... 详细信息

纳米石墨烯材料由于其良好的热物性已成为研究热点。文章以纳米石墨烯片为填料,通过机械法和化学改性法,得出在纳米石墨烯片—石蜡复合相变材料的分散体系中聚酯型超分散剂的最佳添加量为2%。试验通过沉淀、分离得到复合相变材料的稳定均匀分散液,分析研究得出纳米石墨烯片的添加量对复合相变材料的相变起始点、终止点以及相变峰值等温度参数并没有太大影响,但纳米石墨烯片的添加量过多过少都会使复合相变材料的相变潜热降低,当纳米石墨烯片的添加量为1.5%时,复合相变材料的相变潜热较纯石蜡升高0.7%。同时纳米石墨烯片—石蜡复合相变材料具有良好的循环稳定性。

关键词：石蜡纳米石墨烯片蓄冷材料相变潜热

胍基乙酸合成代谢途径及其在动物生产中应用研究进展

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饲料研究 2022年第5期45卷 133-137页

作者：王艳玲 Wilard Tuto Gica 永锋姜海龙吉林农业大学动物科学技术学院吉林长春130118 吉林省生猪产业技术创新中心吉林长春130118 动物生产与产品质量安全教育部重点实验室吉林长春130118

胍基乙酸是一种天然存在的氨基酸衍生物,可作为肌酸的直接前体物质,而肌酸是肌肉和神经组织能量代谢中的一种重要化合物。胍基乙酸作为一种新型的营养性添加剂,外源补充对动物无明显的副作用,在改善动物生长性能和胴体品质方面具有重要... 详细信息

胍基乙酸是一种天然存在的氨基酸衍生物,可作为肌酸的直接前体物质,而肌酸是肌肉和神经组织能量代谢中的一种重要化合物。胍基乙酸作为一种新型的营养性添加剂,外源补充对动物无明显的副作用,在改善动物生长性能和胴体品质方面具有重要作用。文章综述胍基乙酸生物转化的基本代谢途径及其在动物生产中的应用,为胍基乙酸在畜禽养殖行业中的应用提供参考。

关键词：胍基乙酸合成代谢动物生产

西部高原地区某大型国企员工脂肪肝患病率及其危险因素分析

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工业卫生与职业病 2016年第5期42卷 326-330,334页

作者：申洋蒋莹曾庆奇王燕玲北京大学公共卫生学院社会医学与健康教育系北京100191

目的了解高原地区某国企员工脂肪肝的患病率及其危险因素。方法采用横断面调查的方法,对西部高原地区某大型国企参加体检的员工进行调查。调查内容包括问卷调查、体格检查、生化指标测定以及肝脏实时超声检查。结果本次共调查4 180名员... 详细信息

目的了解高原地区某国企员工脂肪肝的患病率及其危险因素。方法采用横断面调查的方法,对西部高原地区某大型国企参加体检的员工进行调查。调查内容包括问卷调查、体格检查、生化指标测定以及肝脏实时超声检查。结果本次共调查4 180名员工。脂肪肝的患病率为25.5%,其中男性患病率为31.5%,女性患病率为10.0%,男性患病率明显高于女性(P<0.01);且有随着年龄增长而上升的趋势(P<0.01)。初中及以下文化程度、高经济收入、后勤岗位、野外工作、夜班工作的员工脂肪肝患病率较高(P<0.01),分别为38.2%、36.9%、31.5%、36.0%和34.3%;高胆固醇、高甘油三酯、糖尿病、高血压、超重/肥胖以及高尿酸血症者脂肪肝患病率均高于正常对照组(P<0.01),分别为40.6%、44.7%、57.0%、35.8%、48.0%和46.6%。非条件logistic回归分析显示,在控制其他混杂因素后,性别、年龄、文化程度、经济收入、岗位类型、工作地点、工时制度、高胆固醇、糖尿病、高血压、超重/肥胖及高尿酸血症与脂肪肝密切相关,其中超重/肥胖的影响最大(OR=5.784)。结论该国企员工脂肪肝患病率较高,脂肪肝的发生与多种因素有关,建议针对危险因素和重点人群,基于工作场所开展干预活动。

关键词：西部高原国企人员脂肪肝危险因素

The emerging role of nitric oxide in the synaptic dysfunction of vascular dementia

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Neural Regeneration Research 2025年第2期20卷 402-415页

作者： Xiaorong Zhang Zhiying Chen Yinyi Xiong Qin Zhou ling-Qiang Zhu Dan Liu Department of Pathology Affiliated Hospital of Jiujiang UniversityJiujiangJiangxi ProvinceChina Jiujiang Clinical Precision Medicine Research Center JiujiangJiangxi ProvinceChina Center for Cognitive Science and Transdisciplinary Studies Jiujiang UniversityJiangxi ProvinceChina Department of Neurology Affiliated Hospital of Jiujiang UniversityJiujiangJiangxi ProvinceChina Department of Rehabilitation Affiliated Hospital of Jiujiang UniversityJiujiangJiangxi ProvinceChina Department of Pathophysiology School of Basic MedicineTongji Medical CollegeHuazhong University of Science and TechnologyWuhanHubei ProvinceChina

With an increase in global aging,the number of people affected by cerebrovascular diseases is also increasing,and the incidence of vascular dementia-closely related to cerebrovascular risk-is increasing at an epidemic ***,few therapeutic options exist that can markedly improve the cognitive impairment and prognosis of vascular dementia *** in Alzheimer’s disease and other neurological disorders,synaptic dysfunction is recognized as the main reason for cognitive *** oxide is one of the ubiquitous gaseous cellular messengers involved in multiple physiological and pathological processes of the central nervous ***,nitric oxide has been implicated in regulating synaptic plasticity and plays an important role in the pathogenesis of vascular *** review introduces in detail the emerging role of nitric oxide in physiological and pathological states of vascular dementia and summarizes the diverse effects of nitric oxide on different aspects of synaptic dysfunction,neuroinflammation,oxidative stress,and blood-brain barrier dysfunction that underlie the progress of vascular ***,we propose that targeting the nitric oxide-sGC-cGMP pathway using certain specific approaches may provide a novel therapeutic strategy for vascular dementia.

关键词： endoplasmic reticulum stress endothelial nitric oxide synthase gene therapy nitric oxide NO-sGC-cGMP pathway synaptic dysfunction vascular dementia

Acute and chronic excitotoxicity in ischemic stroke and late-onset Alzheimer's disease

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Neural Regeneration Research 2025年第7期20卷 1981-1988页

作者： Shan Ping Yu Emily Choi Michael QJiang ling Wei Department of Anesthesiology Emory University School of MedicineAtlantaGAUSA Center for Visual and Neurocognitive Rehabilitation Atlanta Veterans Affairs Medical CenterDecaturGAUSA

Stroke and Alzheimer's disease are common neurological disorders and often occur in the same *** comorbidity of the two neurological disorders represents a grave health threat to older *** review presents a brief background of the development of novel concepts and their clinical *** activity of glutamatergic N-methyl-D-aspartate receptors and N-methyl-D-aspartate receptor-mediated Ca^(2+)influx is critical for neuronal *** ischemic insult induces prompt and excessive glutamate release and drastic increases of intracellular Ca^(2+)mainly via N-methyl-D-aspartate receptors,particularly of those at the extrasynaptic *** Ca^(2+)-evoked neuronal cell death in the ischemic core is dominated by necrosis within a few hours and days known as acute ***,mild but sustained Ca^(2+)increases under neurodegenerative conditions such as in the distant penumbra of the ischemic brain and early stages of Alzheimer's disease are not immediately toxic,but gradually set off deteriorating Ca^(2+)-dependent signals and neuronal cell loss mostly because of activation of programmed cell death *** on the Ca^(2+)hypothesis of Alzheimer's disease and recent advances,this Ca^(2+)-activated“silent”degenerative excitotoxicity evolves from years to decades and is recognized as a unique slow and chronic *** N-methyl-D-aspartate receptor subunit GluN3A,primarily at the extrasynaptic site,serves as a gatekeeper for the N-methyl-D-aspartate receptor activity and is neuroprotective against both acute and chronic *** stroke and Alzheimer's disease,therefore,share an N-methyl-D-aspartate receptor-and Ca^(2+)-mediated mechanism,although with much different time *** is thus proposed that early interventions to control Ca^(2+)homeostasis at the preclinical stage are pivotal for individuals who are susceptible to sporadic late-onset Alzheimer's disease and Alzheimer's disease-related

关键词： Ca^(2+)hypothesis cognitive deficits hyperactivity late-onset Alzheimer's disease neurodegeneration N-methyl-D-aspartate receptors N-methyl-D-aspartate receptor subunits pathogenesis preventive treatment

Effects of temperature on UV-B-induced DNA damage and photorepair in Arabidopsis thaliana

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Journal of Environmental Sciences 2004年第1期16卷 173-176页

作者： LIShao-shan wangyan BJOERNLarsOlof SchoolofLifeSciences SouthChinaNormalUniversityGuangzhou510631China SchoolofLifeSciencesandTechnology JinanUniversityGuangzhou510632China DepartmentofPlantPhysiology LundUniversityBox117SE-22100LundSweden

DNA damage in the form of cyclobutane pyrimidine dimers(CPDs) and (6-4) photoproducts(6-4PPs) induced by UV-B radiation in Arabidopsis thaliana at different temperatures was investigated using ELISA with specific monoclonal antibodies. CPDs and 6-4PPs increased during 3 h UV-B exposure, but further exposure led to decreases. Contrary to the commonly accepted view that DNA damage induced by UV-B radiation is temperature-independent because of its photochemical nature, we found UV-B-induction of CPDs and 6-4PPs in Arabidopsis to be slower at a low than at a high temperature. Photorepair of CPDs at 24℃ was much faster than that at 0℃ and 12℃, with 50% CPDs removal during 1 h exposure to white light. Photorepair of 6-4PPs at 12℃ was very slow as compared with that at 24℃, and almost no removal of 6-4PPs was detected after 4 h exposure to white light at 0℃. There was evidence to suggest that temperature-dependent DNA damage and photorepair could have important ecological implications.

关键词： Arabidopsis thaliana cyclobutane pyrimidine dimers(CPDs) DNA repair (6-4) photoproducts(6-4PPs) temperature UV-B radiation

Boosting charge extraction and efficiency of inverted perovskite solar cells through coordinating group modification at the buffer layer/cathode interface

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Nano Research 2025年第1期18卷 415-423页

作者： Zhiqing Liang Ziqiu Ren Ziyu Wang Nan Yan ling Li Bo Zhang Yanlin Song College of Chemistry Zhengzhou UniversityZhengzhou 450052China Key Laboratory of Applied Surface and Colloid Chemistry Ministry of Education Shaanxi Key Laboratory for Advanced Energy DevicesShaanxi Engineering Lab for Advanced Energy Technology School of Materials Science and EngineeringShaanxi Normal UniversityXi’an 710119China Key Laboratory of Green Printing Institute of ChemistryChinese Academy of Sciences(ICCAS)Beijing Engineering Research Center of Nanomaterials for Green Printing TechnologyNational Laboratory for Molecular Sciences(BNLMS)Beijing 100190China

In inverted perovskite solar cells (PSCs),effective modification of the interface between the metalcathode and electron transport layer (ETL) is crucial forachieving high performance and stability. Herein, sulfonatedbathocuproine, commonly known as disodium bathocuproinedisulfonate (BCDS), was employed as a cathode buffer layerto address the interfacial issues at the [6,6]-phenyl-C61-butyricacid methyl ester (PCBM)/Ag interface. BCDS possesses theability to form coordinate bonds with Ag electrodes. Theutilization of the BCDS buffer layer enhanced the chargeextraction capability at the cathode interface whilesimultaneously achieving interfacial defect passivation,improving interfacial contact and increasing the built-in electricfield. Consequently, a power conversion efficiency (PCE) of25.06% was achieved. Furthermore, owing to the excellent filmforminguniformity of BCDS on PCBM, the stability of thedevice was also improved. After storage in dry air for morethan 2000 h, the device maintained 96% of its initial efficiency. This work underscores the remarkable potential of tailoringcoordination groups to enhance charge extraction efficiency at the ETL-cathode interface, unveiling a promising newfrontier in buffer layer development and performance optimization strategies for PSCs.

关键词： perovskite solar cells buffer layer bathocuproine disulfonate coordination group modification electron transport layer(ETL)-cathode interface

Biological removal of methanol from process condensate for the purpose of reclamation

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Journal of Environmental Sciences 2004年第3期16卷 384-386页

作者： wangyan-ming YANGMin ZHANGYu GAOMeng-chun ZHANGJing ResearchCenterforEeo-EnvironmentalSciences ChineseAcademyofSciencesBeijing100085China

The biological removal of methanol from condensate of ammonia manufacturing processes for the purpose of reclamation using contact type reactor was studied. Methanol of 60 mg/L was removed completely under an HRT of 1 12 h. Optimal inorganic nutrient dose was determined on evaluating methanol removal performance and dehydrogenase activities(DHA) under different nutrition doses. The optimal inorganic nutrient dose only gave an increase of conductivity of ca. 10 μs/cm 2 in the effluent on treating synthetic condensate containing methanol of 30 mg/L. The results demonstrated that biological removal of methanol was effective for the purpose of recovering the methanol bearing condensate.

关键词： reclamation condensate methanol removal biological contact reactor

Progress of research in the application of ultrasound technology for the treatment of Alzheimer’s disease

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Neural Regeneration Research 2025年第10期20卷 2823-2837页

作者： Qiuquan Cai Lianghui Meng Meina Quan ling Wang Jing Ren Chenguang Zheng Jiajia Yang Dong Ming Academy of Medical Engineering and Translational Medicine Tianjin UniversityTianjinChina Innovation Center for Neurological Disorders Xuanwu HospitalCapital Medical UniversityBeijingChina Brain-Computer Interaction and Human-Machine Fusion Haihe Laboratory Tianjin UniversityTianjinChina Tianjin Key Laboratory of Brain Science and Neural Engineering Tianjin UniversityTianjinChina

Alzheimer’s disease is a common neurodegenerative disorder defined by decreased reasoning abilities,memory loss,and cognitive *** presence of the blood-brain barrier presents a major obstacle to the development of effective drug therapies for Alzheimer’s *** use of ultrasound as a novel physical modulation approach has garnered widespread attention in recent *** a safe and feasible therapeutic and drug-delivery method,ultrasound has shown promise in improving cognitive *** article provides a summary of the application of ultrasound technology for treating Alzheimer’s disease over the past 5 years,including standalone ultrasound treatment,ultrasound combined with microbubbles or drug therapy,and magnetic resonance imaging-guided focused ultrasound *** is placed on the benefits of introducing these treatment methods and their potential *** found that several ultrasound methods can open the blood-brain barrier and effectively alleviate amyloid-βplaque *** believe that ultrasound is an effective therapy for Alzheimer’s disease,and this review provides a theoretical basis for future ultrasound treatment methods.

关键词： Alzheimer’s disease blood-brain barrier drugs magnetic resonance imaging-guided focused ultrasound microbubbles scanning ultrasound ultrasound ultrasound stimulation