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Indigenous Purple Vegetable Extracts Protect against Hydrogen Peroxide-Induced DNA Damage in Human Lymphocytes

Food and Nutrition Sciences 2013年第8期4卷 62-70页

作者： Pi-Yu Chao Wei-Yu Huang Shene-Pin Hu hsiao-feng lo Kuan-Hung Lin Meng-Yuan Huang Tsan-Ru Chang Chi-Ming Yang Department of Food Health and Nutrition Science Chinese Culture University Taipei Taiwan Department of Horticulture and Landscape Architecture National Taiwan University Taipei Taiwan Graduate Institute of Bio- technology Chinese Culture University Taipei Taiwan Institute of Applied Life Science Chinese Culture University Taipei Taiwan Research Center for Biodiversity Academia Sinica Taipei Taiwan School of Nutrition and Health Sciences Taipei Medical University Taipei Taiwan Taoyuan District Agricultural Research and Extension Station Council of Agriculture Executive Yuan Taoyuan Taiwan

The objectives of this study were to identify the antioxidants in acid hydrolysates of six of Taiwan’s indigenous purple-leaved vegetables (IPLV), including purple-leaved sweet potato (Ipomoea batatas L. Lamark), purple-leaved gynura line 1 (Gynura bicolor D.C.), purple-leaved gynura line 2 (Gynura bicolor D.C.), purple-leaved perilla line 1 (Perilla frutescents L. Britton), bicolored-leaved perilla line 2 (Perilla frutescens L. Britton), and heartleaf houttuynia (Houttuynia cordata Thumb.). Their antioxidant activity and ability to protect DNA from oxidative damage was also evaluated. The antioxidants identified included flavonoids, anthocyanidins and flavonols. Both purple-leaved perilla line 1 and bicolored-leaved perilla line 2 were found to be abundant in cynidin, malvidin, and myricetin. Moreover, purple-leaved sweet potato and heartleaf houttuynia were found to be abundant in quercetin. Purple-leaved sweet potato and purple-leaved perilla line 1 contained significantly higher inhibition percentages of conjugated diene formation than other vegetables. Purple-leaved sweet potato, heartleaf houttuynia, purple-leaved perilla line 1, and bicolored-leaved perilla line 2 had better inhibition percentages of tail DNA% and tail moment in the study. In conclusion, the abovementioned four indigenous purple-leaved vegetables abounded in antioxidants had strong antioxidant activity for protecting DNA in lymphocytes from oxidative damages.

关键词： Antioxidant Indigenous Purple-Leaved Vegetables Comet Assay Flavonols Cynidin

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Traceable Lactate-Fueled Self-Acting Photodynamic Therapy against Triple-Negative Breast Cancer

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Research 2024年第3期2024卷 723-733页

作者： Yifan Zhang Guangle feng Ting He Min Yang Jing Lin Peng Huang Marshall Laboratory of Biomedical Engineering International Cancer CenterShenzhen Key Laboratory of Tumor Visualization Molecular MedicineLaboratory of Evolutionary Theranostics(LET)School of Biomedical EngineeringShenzhen University Medical SchoolShenzhen UniversityShenzhen518055China.

The depth of light penetration and tumor hypoxia restrict the efficacy of photodynamic therapy(PDT)in triple-negative breast cancer(TNBC),while the overproduction of lactate(LA)facilitates the development,aggressiveness,and therapy resistance of *** address these issues,a self-acting PDT nanosystem(HL@hMnO_(2)-lo_(x)@HA)is fabricated by loading 2-(1-hexyloxyethyl)-2-devinyl pyropheophorbide-alpha(HPPH),luminol,and LA oxidase(lo_(x))in a hyaluronic acid(HA)-coated hollow manganese dioxide(hMnO_(2))***_(x) catalyzes the oxidation of LA into pyruvate and hydrogen peroxide(H_(2)O_(2)),thus depleting the overproduced intratumoral *** the acidic tumor microenvironment,H_(2)O_(2) reacts with luminol and hMnO_(2) to yield blue luminescence as well as O_(2) and Mn^(2+),***^(2+)could further enhance this *** is then excited by the chemiluminescence through chemiluminescence resonance energy transfer for self-illuminated *** generated O_(2) alleviates the hypoxia state of the TNBC tumor to produce sufficient 1O_(2) for self-oxygenation *** Mn^(2+)performs T1 magnetic resonance imaging to trace the self-acting PDT *** work provides a biocompatible strategy to conquer the limits of light penetration and tumor hypoxia on PDT against TNBC as well as LA overproduction.

关键词： Breast Therapy manganese

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Efficient slope reliability analysis under soil spatial variability using maximum entropy distribution with fractional moments

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Journal of Rock Mechanics and Geotechnical Engineering 2024年第4期16卷 1140-1152页

作者： Chengxin feng Marcos A.Valdebenito Marcin Chwała Kang Liao Matteo Broggi Michael Beer Institute for Risk and Reliability Leibniz University HannoverCallinstr.34Hannover30167Germany Chair for Reliability Engineering TU Dortmund UniversityLeonhard-Euler-Str.5Dortmund44227Germany Faculty of Civil Engineering Wrocƚaw University of Science and TechnologyWrocƚawPoland Faculty of Geosciences and Environmental Engineering Southwest Jiaotong UniversityChengdu610031China University of Liverpool Institute for Risk and UncertaintyPeach StreetLiverpoolL69 7ZFUnited Kingdom International Joint Research Center for Resilient Infrastructure & International Joint Research Center for Engineering Reliability and Stochastic Mechanics Tongji UniversityShanghaiChina

Spatial variability of soil properties imposes a challenge for practical analysis and design in geotechnical *** latter is particularly true for slope stability assessment,where the effects of uncertainty are synthesized in the so-called probability of *** probability quantifies the reliability of a slope and its numerical calculation is usually quite involved from a numerical *** view of this issue,this paper proposes an approach for failure probability assessment based on Latinized partially stratified sampling and maximum entropy distribution with fractional *** spatial variability of geotechnical properties is represented by means of random fields and the Karhunen-loève ***,failure probabilities are estimated employing maximum entropy distribution with fractional *** application of the proposed approach is examined with two examples:a case study of an undrained slope and a case study of a slope with cross-correlated random fields of strength parameters under a drained *** results show that the proposed approach has excellent accuracy and high efficiency,and it can be applied straightforwardly to similar geotechnical engineering problems.

关键词： Slope Random field Reliability analysis Maximum entropy distribution Latinized partial stratified sampling

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Water quality and habitat drive phytoplankton taxonomic and functional group patterns in the Yangtze River

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Ecological Processes 2024年第1期13卷 144-158页

作者： Wenqi Gao Fangyuan Xiong Ying Lu Wei Xin Haihua Wang Gangpeng feng Chiping Kong Lei Fang Xiaoping Gao Yushun Chen State Key Laboratory of Freshwater Ecology and Biotechnology Institute of Hydrobiology Chinese Academy of Sciences University of Chinese Academy of Sciences Jiangxi Institute for Fisheries Sciences Poyang Lake Fisheries Research Centre of Jiangxi Province East China Sea Fisheries Research Institute Chinese Academy of Fishery Sciences Jiujiang Institute of Agricultural Sciences

Background Although phytoplankton are important primary producers in food webs, they are relatively less studied in large rivers compared to other types of systems. To fill this research gap, we studied phytoplankton taxonomic and functional composition and their relationships with water quality, habitat, climate, and land use across 30 river sections in the middle and lower reaches of the Yangtze River during 2017–*** Major observed phytoplankton groups were cyanobacteria, bacillariophyta, and chlorophyta. Phytoplankton total abundance, total biomass, and species richness significantly decreased in the dry season compared to the wet season, with the species and functional composition differing significantly between seasons. Phytoplankton species differences between seasons were mainly contributed by Oscillatoria sp., Pseudanabaena sp., and Melosira granulata. The dfferences in phytoplankton functional groups between seasons were mainly contributed by P（including Closterium sp., Melosira sp.）, lo（including Merismopedia sp., Peridinium sp., Ceratium sp., and Gymnodinium sp.）, and J（including Pediastrum sp., Tetraedron sp., Crucigenia sp., Scenedesmus sp., and Coelastrum sp.）. The variance partitioning showed that water quality（NO3-N, total suspended solids, turbidity） and habitat（water flow, river bank and river channel conditions） were critical factors in shaping phytoplankton patterns, followed by climate and land *** Results indicated that there was significant seasonal variation of phytoplankton in the Yangtze River, with water quality and habitat primarily driving phytoplankton patterns. Our study contributes to the understanding of natural and anthropogenic factors that drive seasonal successional processes of phytoplankton in the Yangtze River. These findings have important implications for environmental management as well as towards the ecological restoration of large rivers.

关键词： Yangtze River Phytoplankton Functional group Water quality Physical habitat

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TEMPERATURE RESPONSIVE METHACRYLAMIDE POLYMERS WITH ANTIBACTERIAL ACTIVITY

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Chinese Journal of Polymer Science 2010年第4期28卷 607-613页

作者：陈伯宽 Shuen-Hung lo Shu-feng Lee Department of Polymer Materials Kun Shan University

A new methacrylamide monomer, hexylamine methacrylamide （MAHA）, was synthesized and used in polymerizations. The homopolymer of MAHA and its copolymers were synthesized by free radical polymerization techniques with N-isopropyl acrylamide （NIPAAm） in two different compositions. The quatemization of the homopolymer and copolymers were carried out using 1-bromopropane. The copolymers with NIPAAm and a low MAHA content showed temperature-responsive behavior in an aqueous environment. The lower critical solution temperatures （LCSTs） of these polymers varied between 32℃ and 44℃. The LCSTs of quatemized copolymers were higher than those of neutral copolymers because they were more hydrophilic. The obtained homopolymers and copolymers were tested for antibacterial activities against S. aureus and E. coli. The quatemized water-soluble copolymers showed antibacterial activities against S. aureus. The quaternization resulted in the synthesis of both antibacterial and temperature-responsive copolymers.

关键词： Methacrvlamide: NIPAAm: Antibacterial: Temperature-rest)onsive

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Catalytic Properties of Pt Cluster-Decorated CeO2 Nanostructures

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Nano Research 2011年第1期4卷 61-71页

作者： Lin feng Dat Tien Hoang Chia-Kuang Tsung Wenyu Huang Sylvia hsiao-Yun lo Jennifer B. Wood Hungta Wang dinyao Tang Peidong Yang Department of Chemistry University of California Berkeley California 94720 USA Department of Chemistry Tsinghua University Beijing 100084 China Department of Chemistry Merkert Chemistry Center Boston College 2609 Beacon Street Chestnut Hill Massachusetts 02467 USA

Uniform clusters of Pt have been deposited on the surface of capping-agent-free CeO2 nanooctahedra and nanorods using electron beam （e-beam） evaporation. The coverage of the Pt nanocluster layer can be controlled by adjusting the e-beam evaporation time. The resulting e-beam evaporated Pt nanocluster layers on the CeO2 surfaces have a clean surface and clean interface between Pt and CeO2. Different growth behaviors of Pt on the two types of CeO2 nanocrystals were observed, with epitaxial growth of Pt on CeO2 nanooctahedra and random growth of Pt on CeO2 nanorods. The structures of the Pt clusters on the two different types of CeO2 nanocrystals have been studied and compared by using them as catalysts for model reactions. The results of hydrogenation reactions clearly showed the clean and similar chemical surface of the Pt clusters in both catalysts. The support- dependent activity of these catalysts was demonstrated by CO oxidation. The Pt/CeO2 nanorods showed much higher activity compared with Pt/CeO2 nanooctahedra because of the higher concentration of oxygen vacancies in the CeO2 nanorods. The structure-dependent selectivity of dehydrogenation reactions indicates that the structures of the Pt on CeO2 nanorods and nanooctahedra are different. Thes differences arise because the metal deposition behaviors are modulated by the strong metal-metal oxide interactions.

关键词： Nanocrystals nanoclusters interface catalysis

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Carbon nanotube supported PtOx nanoparticles with hybrid chemical states for efficient hydrogen evolution

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Journal of Energy Chemistry 2021年第7期30卷 364-369页

作者： Kun feng Hechuang Zheng Duo Zhang Guotao Yuan lo-Yueh Chang Yufeng Chen Jun Zhong Institute of Functional Nano and Soft Materials Laboratory(FUNSOM) Jiangsu Key Laboratory for Carbon-Based Functional Materials&DevicesSoochow UniversitySuzhou 215123JiangsuChina State Key Laboratory of Radiation Medicine and Protection School of Radiation Medicine and ProtectionSoochow UniversitySuzhou 215123JiangsuChina

Efficient electrocatalysts for hydrogen evolution reaction(HER) in alkaline solution are highly required for water *** we design an ultra-small PtOx nanoparticle with hybrid Pt chemical states on carbon nanotubes as highly efficient alkaline HER catalyst,which shows a low overpotential of 19.4 mV at 10 mA cm^(-2),a high mass activity of 5.56 A mg_(Pt)^(-1) at 0.1 V, and a stable durability for at least 20 *** HER performance is better than that of the benchmark 20 wt% Pt/C while the Pt content in the catalyst is only about one tenth of that in Pt/*** also represents one of the best catalysts ever reported for HER in alkaline *** radiation X-ray absorption spectroscopy reveals that the efficient and stable alkaline HER performance can be attributed to the favorable design of hybrid chemical states of Pt with carbon nanotubes,which exhibits abundant surface Pt-O as active catalytic sites and forms stable Pt-C interfacial interaction to both anchor the NPs and improve the synergistic effect between catalyst and substrate.

关键词： Electrochemical HER Carbon nanotubes Hybrid chemical states Ultra-small nanoparticle Interfacial interaction

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地方政府生态保护力度如何影响经济高质量发展?

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中国人口·资源与环境 2024年第3期34卷 177-191页

作者：高长海王锋西安交通大学经济与金融学院陕西西安710061 周口师范学院经济与管理学院河南周口466000

地方政府生态保护的策略性行为选择是影响其生态保护力度的关键因素。该研究在对各省份生态保护力度指数测度的基础上,将生态保护与有为政府相结合,从策略性行为选择的视角,考察地方政府生态保护力度对经济高质量发展影响的内在机理和... 详细信息

地方政府生态保护的策略性行为选择是影响其生态保护力度的关键因素。该研究在对各省份生态保护力度指数测度的基础上,将生态保护与有为政府相结合,从策略性行为选择的视角,考察地方政府生态保护力度对经济高质量发展影响的内在机理和市场化程度在两者关系中的调节机制,并以2008—2021年中国30个省份的面板数据为样本,构建静态面板模型和空间杜宾模型对上述机理机制进行实证检验。结果表明:①各省份的地方政府生态保护力度指数均显著提升;地理分区的地方政府生态保护力度指数,表现为东部、中部和西部地区之间依次递减,南方地区大于北方地区的格局;而增速则相反,东部、中部和西部地区之间依次递增,南方地区慢于北方地区;地理分区之间的地方政府生态保护力度梯度差表现为缩小的趋势;地方政府生态保护力度对经济高质量发展的影响表现为“U”型特征,当前的影响表现为正向促进作用。②本地政府生态保护力度对邻地经济高质量发展的影响具有空间溢出效应,具体溢出效果取决于地方政府间生态保护的策略性行为选择;地理邻近省份间的策略性行为选择为“逐底竞争”,其空间溢出效应表现为反向;经济邻近省份间的策略性行为选择为“竞相向上”,其空间溢出效应表现为同向。③市场化程度是地方政府生态保护力度影响经济高质量发展的调节机制;市场化程度对二者关系的影响表现为强化效应;且随着市场化程度提升,地方政府生态保护力度对经济高质量发展影响的“U”型曲线拐点值将向左移动。

关键词：生态保护力度经济高质量发展评价指标体系空间溢出效应

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Role of submucosal injection in radiofrequency ablation of gastric low-grade dysplasia: Effects on symptoms and outcomes

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中华医学杂志(英文版) 2024年第17期137卷 2099-2110页

作者： Niu Xiaotong Wang Nanjun Wang Yan feng Jia Li longsong Han Ke Chai Ningli Linghu Enqiang Medical School of Chinese PLA General Hospital Beijing China Department of Gastroenterology and Hepatology The First Medical Center Chinese PLA General Hospital Beijing China Nankai University School of Medicine Nankai University Tianjin China Department of Gastroenterology Bethune International Peace Hospital ShijiaZhuang Hebei China

Background: To date, there is still a lack of standardized management strategies for gastric low-grade dysplasia (LGD), which is a direct neoplastic precancerous lesion and requires specifically superficial destruction. Radiofrequency ablation (RFA) is expected to be an effective method for gastric LGD, but post-RFA pain may affect patients’ satisfaction and compliance. The current study aimed to evaluate the value of a submucosal injection prior to RFA (SI-RFA) for postoperative pain and treatment ***: Between October 2014 and July 2021, gastric LGDs without risk factors (size >2 cm, unclear boundary, and abnormal microsurface and microvascularity) undergoing regular RFA and SI-RFA were retrospectively analyzed. Postoperative pain scores, wound healing, and clinical efficacy were compared. Propensity score matching, stratified analysis, and multivariable logistic regression were performed to control the confounding ***: One hundred and ninety-seven gastric LGDs in 151 patients received regular RFA. Forty-nine gastric LGDs in 36 patients received SI-RFA. Thirty-six pairs of patients were selected for the assessment of postoperative pain by propensity score matching. Compared to regular RFA, SI-RFA significantly decreased the degree and duration of postoperative pain (OR, 0.32; 95% CI, 0.13-0.84;P = 0.020), improved wound healing rate (80.0% [36/45]vs. 58.9% [89/151],P = 0.012), increased the complete ablation rate (91.8% [45/49]vs. 86.3% [170/197],χ2 = 1.094,P = 0.295), but correlated with higher rates of local recurrence and progression (25.6% [10/39]vs. 13.2% [18/136],χ2 = 3.471,P = 0.062; 8.3% [3/36]vs. 0.9% [1/116],P = 0.042). The multivariable logistic regression model confirmed that submucosal injection was associated with local recurrence (OR, 2.93; 95% CI, 1.13-7.58;P = 0.027).Conclusions: Submucosal injections prior to RFA may reduce postoperative pain and scar formation while ensuring complete ablation of gastric LGD. However, lo

关键词： Gastric low-grade dysplasia Radiofrequency ablation Submucosal injection Postoperative pain Treatment outcome

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Hybrid solar cells based on poly（3-hexylthiophene） and electrospun TiO2 nanofibers modified with CdS nanoparticles

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Progress in Natural Science:Materials International 2013年第5期23卷 514-518页

作者： Shingchung lo Zhike Liu Jinhua Li Helen Laiwa Chan feng Yan Department of Applied Physics and Materials Research Centre The Hong Kong Polytechnic University

Organic–inorganic hybrid solar cells based on poly(3-hexylthiophene) and electrospun TiO2 nano bers were fabricated by solution *** ef ciency of the device was improved by modifying CdS nanoparticles on the surface of TiO2 by electrochemical *** CdS layer can lead to the increase of both open circuit voltage and short circuit current of the device,which are attributed to enhanced exciton dissociation and light absorption and suppressed carrier recombination by CdS at the ***,too thick CdS layer led to increased series resistance and decreased ef ciency of the ***,the optimum condition of the CdS deposition was obtained,which increased the power conversion ef ciency of the device for about 50%.Our results indicate that the surface modi cation on the inorganic semiconductor layer is an effect way to improve the performance of the hybrid solar cells.

关键词： Organic solar cells TiO2 nanofiber CdS nanoparticle Surface modification

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