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Nanostructured materials with localized surface plasmon resonance for photocatalysis

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Chinese Chemical Letters 2022年第3期33卷 1154-1168页

作者： juan Li Zaizhu Lou Baojun Li Institute of Nanophotonics Jinan UniversityGuangzhou 511443China state Key Laboratory for Crystal Materials Shandong UniversityJi'nan 250100China

Localized surface plasmon resonance (LsPR) enhanced photocatalysis has fascinated much interest and considerable efforts have been devoted toward the development of plasmonic photocatalysts. In the past decades, noble metal nanoparticles (Au and Ag) with LsPR feature have found wide applications in solar energy conversion. Numerous metal-based photocatalysts have been proposed including metal/semiconductor heterostructures and plasmonic bimetallic or multimetallic nanostructures. However, high cost and scarce reserve of noble metals largely limit their further practical use, which drives the focus gradually shift to low-cost and abundant nonmetallic nanostructures. Recently, various heavily doped semiconductors (such as WO_(3-x), MoO_(3-x), Cu_(2-x)s, TiN) have emerged as potential alternatives to costly noble metals for efficient photocatalysis due to their strong LsPR property in visible-near infrared region. This review starts with a brief introduction to LsPR property and LsPR-enhanced photocatalysis, the following highlights recent advances of plasmonic photocatalysts from noble metal to semiconductor-based plasmonic nanostructures. Their synthesis methods and promising applicability in plasmon-driven photocatalytic reactions such as water splitting, CO_(2) reduction and pollution decomposition are also summarized in details. This review is expected to give guidelines for exploring more efficient plasmonic systems and provide a perspective on development of plasmonic photocatalysis.

关键词： Localized surface plasmon resonance Plasmonic photocatalysis Plasmonic semiconductor Hot electrons solar energy harvesting

Leaf Gas Exchange,Chlorophyll Fluorescence,and Fruit Yield in Hot Pepper (Capsicum anmuum L.) Grown Under Different shade and soil Moisture During the Fruit Growth stage

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Journal of Integrative Agriculture 2012年第6期11卷 927-937页

作者： ZHU juan-juan PENG Qiang LIANG Yin-li WU King HAO Wang-lin College of Life sciences Northwest A&F University Yangling 712100 P.R.China Extension Center of Agricultural Technology Fengxian Agricultural Bureau Fengxian 721700 P.R.China Institute of soil and Water Conservation the Chinese Academy of Sciences/Ministry of Water Resources Yangling 712100 P..R.China

Relative leaf chlorophyll （Chl.） content, leaf gas exchange, Chl. fluorescence, plant biological biomass, and fruit yield were evaluated in growing hot pepper （Capsicum annuum L.） during the fruit-growing stages in hot summer under three shade levels （un-shade, 30% shade, and 70% shade） and four soil water contents （sWC） of 40-55%, 55-70%, 70-85%, and 85- 100% of field moisture capacity （FMC）. Hot pepper crops were more affected by light irradiance than by soil moisture and by their interaction during the whole observed periods. Hot pepper attained greatest relative leaf Chl. content （expressed as sPAD value） and photosynthetic activity when cultivated with 30% shade, resulting in the highest plant biological biomass and fruit yield. Although 70% shade improved leaf photosynthetic efficiency （expressed as Fv/Fm or Fv＇/Fm＇）, crops obtained the lowest photosynthetic rate, photochemical quenching coefficient （qP）, and non-photochemical quenching coefficient （NPQ）. This showed that light irradiance was insufficiency in s70% （70% shade） treatment. The leaf net photosynthetic rates （PN）, Fc/Fm, and fruit yield increased gradually as sWC levels increased from 40-55% to 70- 85% FMC, but decreased as sWC was higher than 70-85% FMC. The water consumption increased progressively with sWC levels, but water-use efficiency （WUE） was the highest when soil moisture was 55-70% FMC. Interaction of shade and soil moisture had significant effects on PN and FJFm, but not on other parameters. Under drought stress （40-55% and 55-70% FMC）, 30% shade could relieve the droughty damage of crops and improve photosynthetic capacity and WUE, but 70% shade could not, oppositely, aggravate the damage. The positive correlation （r2 =0.72） between leaf PN and fruit yield was existent. This indicated that improvement of leaf photosynthesis would increase potentially marketable yield in hot pepper crops during the full fruit-growing stages. For agricultural purposes, approximately s30% （30% shade） with

关键词： leaf chlorophyll content photosynthetic capacity interaction

Enhanced photogalvanic effect in the two-dimensional MgCl_(2)/ZnBr_(2) vertical heterojunction by inhomogenous tensile stress

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Frontiers of physics 2022年第1期17卷 177-182页

作者： Liyu Qian juan Zhao Yiqun Xie Department of Physics Shanghai Normal University100 Guilin RoadShanghai200234China

The photogalvanic effect (PGE) occurring in noncentrosymmetric materials enables the generation of a dc photocurrent at zero bias with a high polarization sensitivity, which makes it very attractive in photodetection. However, the magnitude of the PGE photocurrent is usually small, leading to a low photoresponsivity, and therefore hampers its practical application in photodetection. Here, we propose an approach to largely enhancing the PGE photocurrent by applying an inhomogenous mechanical stretch, based on quantum transport simulations. We model a two-dimensional photodetector consisting of the wide-bandgap MgCl_(2)/ZnBr_(2) vertical van der Waals heterojunction with the noncentrosymmetric C_(3v) symmetry. Polarization-sensitive PGE photocurrent is generated under the vertical illumination of linearly polarized light. By applying inhomogenous mechanical stretch on the lattice, the photocurrent can be largely increased by up to 3 orders of magnitude due to the significantly increased device asymmetry. Our results propose an effective way to enhance the PGE by inhomogenous mechanical strain, showing the potential of the MgCl_(2)/ZnBr_(2) vertical heterojunction in the low-power UV photodetection.

关键词： photogalvanic effect mechanical stretch polarization-sensitive vertical heterojunction ultraviolet photodetection

Part-load Performance Characteristics of a Lean Burn Catalytic Combustion Gas Turbine system

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Journal of Thermal science 2013年第2期22卷 159-167页

作者： juan Yin Ming Li Jun-qiang Zhu Institute of Engineering Thermophysics Chinese Academy of Sciences China Architecture and Building Press

The purpose of this study is to compare the part-load performance of a lean burn catalytic combustion gas turbine (LBCCGT) system in three different control modes: varying fuel, bleeding off the fuel mixture flow after the compressor and varying rotational speed. The conversions of methane species for chemical process are considered. A 1D heterogeneous plug flow model was utilized to analyze the system performance. The actual turbomachinery components were designed and predicted performance maps were applied to system performance research. The part-load characteristics under three control strategies were numerically investigated. The main results show that: the combustor inlet temperature is a significant factor that can significantly affect the part-load characteristics of the LBCCGT system; the rotational speed control mode can provide the best performance characteristics for part-load operations; the operation range of the bleed off mode is narrower than that of the speed control mode and wider than that of the fuel only mode; with reduced power, methane does not achieve full conversion over the reactor at the fuel only control mode, which will not warrant stable operation of the turbine system; the thermal efficiency of the LBCCGT system at fuel only control strategy is higher than that at bleed off control strategy within the operation range.

关键词： Lean burn catalytic combustion gas turbine part-load characteristics control mode

Diffusion-weighted magnetic resonance imaging reflects activation of signal transducer and activator of transcription 3 during focal cerebral ischemia/reperfusion

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Neural Regeneration Research 2017年第7期12卷 1124-1130页

作者： Wen-juan Wu Chun-juan Jiang Zhui-yang Zhang Kai Xu Wei Li Department of Radiology Nanjing Medical Unversity Affiliated Wuxi Second People's Hospital Wuxi Jiangsu Province China Department of Radiology Affiliated Hospital of Xuzhou Medical University Xuzhou Jiangsu Province China

signal transducer and activator of transcription（sTAT）is a unique protein family that binds to DNA,coupled with tyrosine phosphorylation signaling pathways,acting as a transcriptional regulator to mediate a variety of biological *** ischemia and reperfusion can activate sTATs signaling pathway,but no studies have confirmed whether sTAT activation can be verified by diffusion-weighted magnetic resonance imaging（DWI）in rats after cerebral ischemia/***,we established a rat model of focal cerebral ischemia injury using the modified Longa *** revealed hyperintensity in parts of the left hemisphere before reperfusion and a low apparent diffusion ***3 protein expression showed no significant change after reperfusion,but phosphorylated sTAT3 expression began to increase after 30 minutes of reperfusion and peaked at 24 *** correlation analysis showed that sTAT3 activation was correlated positively with the relative apparent diffusion coefficient and negatively with the DWI abnormal signal *** results indicate that DWI is a reliable representation of the infarct area and reflects sTAT phosphorylation in rat brain following focal cerebral ischemia/reperfusion.

关键词： nerve regeneration cerebral ischemia/repe(fusion magnetic resonance imaging diffusion weighted imaging signal transducer and activator of transcription 3 phosphorylated signal transducer and activator of transcription 3 apparent diffusion coefficient relative apparentdiffusion coefficient immunohistochemistry western blot assay neural regeneration

CONsENsUs AND r-CONsENsUs PROBLEMs FOR sINGULAR sYsTEMs

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Journal of systems science & Complexity 2014年第2期27卷 252-262页

作者： ZHANG Lequn FENG Jun-e YAO juan school of Mathematics Shandong University

In this paper, the problem of consensus for continuous time singular systems of multi-agent networks is considered. The definition of r-consensus is introduced for singular systems of multi-agent networks. Firstly, linear systems with algebraic constraints are considered, and the corresponding results about consensus and average-consensus are derived. Then r-consensus and consensus problems of singular systems are investigated. sufficient conditions of r-consensus and consensus are obtained,respectively. Finally, an illustrative example is given to show the effectiveness of the proposed method.

关键词： Balanced graphs consensus r-consensus singular systems strong connected graphs.

Temporal stability and directional change in a color cline of a marine snail from NW spain

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Current Zoology 2024年第2期70卷 163-173页

作者： juan Gefaell Ramon Vigo A.Honorato Gonzalez-Vazquez juan Galindo Emilio Rolan-Alvarez Centro de Investigacion Marina Universidade de VigoDepartamento de BioquimicaGenetica e Inmunologia36310 VigoSpain

The evolution and maintenance of color clines is a classic topic of research in evolutionary ***,studies analyzing the temporal dynamics of such clines are much less frequent,due to the difficulty of obtaining reliable data about past color distributions along environmen-tal *** this article,we describe a case of decades-long temporal stability and directional change in a color cline of the marine snail Littorina saxatilis along the coastal inlet of the Ria de Vigo(NW spain).*** from this area shows a clear color cline with 3 distinct areas from the innermost to the more wave-exposed localities of the Ria:the inner,protected localities show an abundance of fawn-like individuals;the intermediate localities show a high diversity of colors;and the outer,wave-exposed localities show populations with a high frequency of a black and lineated *** compare data from the 1970s and 2022 in the same localities,showing that the cline has kept relatively stable for at least over half a century,except for some directional change and local variability in the frequency of certain *** regression analyses and biodiversity measures are presented to provide clues into the selective pressures that might be involved in the maintenance of this color *** research avenues to properly test the explanatory power of these selective agents as well as the possible origins of the cline are discussed.

关键词： clinal variation color polymorphism ecological gradient Littorina saxatilis natural selection wave exposure.

Upper gastrointestinal tract involvement of pediatric inflammatory bowel disease: A pathological review

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World Journal of Gastroenterology 2019年第16期25卷 1928-1935页

作者： Dua Abuquteish juan Putra Division of Pathology Department of Paediatric Laboratory Medicine Hospital for Sick Children

Upper gastrointestinal(UGI) tract involvement of inflammatory bowel disease(IBD) is commonly seen in pediatric patients. Upper endoscopy is included in the routine workup of children with suspected IBD to enhance the diagnosis and management of these patients. Currently, childhood IBD is classified into ulcerative colitis(UC), atypical UC, Crohn's disease(CD) and IBD *** confirmation of UGI tract involvement, in particular the presence of epithelioid(non-caseating) granulomas, is helpful in confirming the diagnosis of IBD and its classification. Herein, we reviewed selected IBD-associated UGI tract manifestations in children. Lymphocytic esophagitis, seen predominantly in CD,is histologically characterized by increased intraepithelial lymphocytes(> 20 in one high-power field) in a background of mucosal injury with absence of granulocytes. Focally enhanced gastritis is a form of gastric inflammation in pediatric IBD marked by a focal lymphohistiocytic pit inflammation with or without granulocytes and plasma cells in a relatively normal background gastric mucosa. Duodenal inflammation seen in children with IBD includes cryptitis,villous flattening, increased intraepithelial lymphocytes, and lamina propria eosinophilia. Finally, epithelioid granulomas not associated with ruptured gland/crypt are a diagnostic feature of CD. The clinicopathologic correlation and differential diagnosis of each microscopic finding are discussed. Clinicians and pathologists should be cognizant of the utility and limitations of these histologic features.

关键词： Pediatric Inflammatory bowel disease Lymphocytic esophagitis Focally enhanced gastritis Epithelioid granuloma Crohn’s disease Ulcerative colitis

Hepatocellular adenoma in the paediatric population:Molecular classification and clinical associations

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World Journal of Gastroenterology 2020年第19期26卷 2294-2304页

作者： Elan Hahn juan Putra Division of Pathology Department of Paediatric Laboratory Medicinethe Hospital for Sick ChildrenToronto M5G 1X8ONCanada Department of Laboratory Medicine and Pathobiology University of TorontoToronto M5S 1A8ONCanada

Hepatocellular adenomas(HCAs)represent rare,benign liver tumours occurring predominantly in females taking oral *** children,HCAs comprise less than 5%of hepatic tumours and demonstrate association with various *** contemporary classification of HCAs,based on their distinctive genotypes and clinical phenotypes,includes hepatocyte nuclear factor 1 homeobox alpha-inactivated HCAs,beta-catenin-mutated HCAs,inflammatory HCAs,combined beta-catenin-mutated and inflammatory HCAs,sonic hedgehogactivated HCAs,and unclassified *** children,there is a lack of literature on the characteristics and distribution of HCA *** this review,we summarized different HCA subtypes and the clinicopathologic spectrum of HCAs in the paediatric population.

关键词： Paediatric Hepatocellular adenoma Malignant transformation Beta-catenin HNF1A Glycogen storage disorders