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Paola Rizzo, Rubina Novelli, Cinzia Rota, Elena Gagliardini, Barbara Ruggiero, Daniela Rottoli, Ariela Benigni, Giuseppe Remuzzi
Crescentic glomerulonephritis (GN) is a devastating disease with rapidly progressive deterioration in kidney function, which, histologically, manifests as crescent formation in most glomeruli. We previously found that crescents derive from the aberrant proliferation and migration of parietal epithelial cells (PECs)/progenitor cells, and that the angiotensin (ang) II/ang II type-1 (AT1) receptor pathway may participate, together with the stromal cell-derived factor-1 (SDF-1)/CXCR4 axis, in the development of those lesions...
August 11, 2017: American Journal of Pathology
Fengchan Xi, Xingwei Xu, Shanjun Tan, Tao Gao, Jialiang Shi, Yanxi Kong, Wenkui Yu, Jieshou Li, Ning Li
BACKGROUND AND OBJECTIVES: Enteral nutrition (EN) can improve clinical outcomes as an important treatment in critically ill patients. However, when patients suffer from gastrointestinal function disorders, intestinal intolerance occurs and EN administration may be delayed and even fails to perform. Pectin, a structural heteropolysaccharide, could protect gastrointestinal function from disorders in many gastrointestianl diseases. The present study aimed to determine whether pectin-supplemented EN was safe and improved clinical outcomes in intensive care unit (ICU) patients...
2017: Asia Pacific Journal of Clinical Nutrition
Seungtaeg Oh, Hakhyeon Song, Jihun Oh
Photoelectrochemical (PEC) cells have attracted much attention as a viable route for storing solar energy and producing value-added chemicals and fuels. However, the competition between light absorption and electrocatalysis at a restrained cocatalyst area on conventional planar-type photoelectrodes could limit their conversion efficiency. Here, we demonstrate a new monolithic photoelectrode architecture that eliminate the optical-electrochemical coupling by forming locally nanostructured cocatalysts on a photoelectrode...
August 11, 2017: Nano Letters
Brunna Pinto Froes, Stanley de Almeida Araújo, Eduardo Alves Bambirra, Eduardo Araújo Oliveira, Ana Cristina Simões E Silva, Sérgio Veloso Brant Pinheiro
BACKGROUND: The search for risk factors for chronic kidney disease in children with focal segmental glomerulosclerosis (FSGS) is important in defining prognosis and individualized treatment. This study preliminarily investigated whether CD44 immunostaining in glomerular parietal epithelial cells (PECs) is a prognostic marker in pediatric FSGS. METHODS: In this retrospective study, 26 patients with FSGS, biopsied from 1985 to 2010, were evaluated. Immunohistochemistry for CD44 was performed in all cases...
August 10, 2017: Pediatric Nephrology: Journal of the International Pediatric Nephrology Association
Doriane Destrieux, François Laurent, Hélène Budzinski, Julie Pedelucq, Philippe Vervier, Magali Gerino
Human-use drug residues (DR) are only partially eliminated by waste water treatment plants (WWTPs), so that residual amounts can reach natural waters and cause environmental hazards. In order to properly manage these hazards in the aquatic environment, a database is made available that integrates the concentration ranges for DR, which cause adverse effects for aquatic organisms, and the temporal variations of the ecotoxicological risks. To implement this database for the ecotoxicological risk assessment (ERA database), the required information for each DR is the predicted no effect concentrations (PNECs), along with the predicted environmental concentrations (PECs)...
July 31, 2017: Science of the Total Environment
Tineke H Jones, Victoria Muehlhauser
Hepatitis E virus (HEV), rotavirus (RV), and porcine enteric calicivirus (PEC) infections are common in swine and raises concerns about the potential for zoonotic transmission through undercooked meat products. Enteric viruses can potentially contaminate carcasses during meat processing operations. There is a lack of information on the prevalence and control of enteric viruses in the pork processing chain. This study compared the incidence and levels of contamination of hog carcasses with HEV, RV and PEC at different stages of the dressing process...
July 29, 2017: International Journal of Food Microbiology
Ying-Ying Li, Jia-Hong Wang, Zhi-Jun Luo, Kai Chen, Zi-Qiang Cheng, Liang Ma, Si-Jing Ding, Li Zhou, Qu-Quan Wang
Three component hybrid (MoS2-TiO2)/Au substrate is fabricated by loading plasmonic Au nanorods on the MoS2 nanosheets coated TiO2 nanorod arrays. It is used for photoelectrochemical (PEC) cell and photocatalyst for hydrogen generation. Owing to the charge transfer between the MoS2-TiO2 hetero-structure, the PEC current density and hydrogen generation of TiO2 nanoarrays are enhanced 2.8 and 2.6 times. The broadband photochemical properties are further enhanced after Au nanorods loading. The plasmon resonance of Au nanorods provides more effective light-harvesting, induces hot-electron injection, and accelerates photo-excited charges separation...
August 3, 2017: Scientific Reports
Nur Azimah Abd Samad, Chin Wei Lai, Kung Shiuh Lau, Sharifah Bee Abd Hamid
Efficient solar driven photoelectrochemical (PEC) response by enhancing charge separation has attracted great interest in the hydrogen generation application. The formation of one-dimensional ZnO nanorod structure without bundling is essential for high efficiency in PEC response. In this present research work, ZnO nanorod with an average 500 nm in length and average diameter of about 75 nm was successfully formed via electrodeposition method in 0.05 mM ZnCl₂ and 0.1 M KCl electrolyte at 1 V for 60 min under 70 °C condition...
November 22, 2016: Materials
Zhengping Li, Jun Zhang, Yunxiao Li, Shuang Zhao, Peixin Zhang, Yue Zhang, Jinshun Bi, Guohua Liu, Zhao Yue
In this work, photoelectrochemical (PEC) sensors based on carbon dots (CDs) were developed for ultrasensitive detection of glutathione (GSH) without additional catalysts. In this PEC sensing system, CDs exhibited both photoelectric and catalytic properties. Silver nanoparticles (AgNPs), graphene oxide (GO), and mesoporous silica (MS) were introduced in order to enhance the sensing properties of CDs for GSH. Among the different hybrid nanocomposites, CDs@MS based PEC sensors exhibited the best sensing properties: the sensitivity and limit of detection (LOD) for GSH were found to be 57...
July 27, 2017: Biosensors & Bioelectronics
Yajun Wang, Weikun Bai, Haiquan Wang, Yao Jiang, Shanlei Han, Huaqian Sun, Yuming Li, Guiyuan Jiang, Zhen Zhao, Qing Huan
Constructing a semiconductor type II structure is an effective way to enhance the photogenerated charge separation efficiency. The separation and migration of interfacial photogenerated carriers is a key factor, which influences the photocatalytic activity. In this study, a conformal Al2O3 recombination barrier layer was introduced at the interface between TiO2 nanowires and CdSe nanoparticles, and the application of this composite in photoelectrocatalytic (PEC) hydrogen production was explored. Under visible-light irradiation, the photocurrent response and PEC hydrogen evolution performance increased step-by-step from TiO2 to the Al2O3/TiO2 and CdSe/Al2O3/TiO2 nanowire arrays...
August 15, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
Dezhong Cao, Hongdi Xiao, Qingxue Gao, Xiaokun Yang, Caina Luan, Hongzhi Mao, Jianqiang Liu, Xiangdong Liu
Herein, a lift-off mesoporous GaN-based thin film, which consisted of a strong phase-separated InGaN/GaN layer and an n-GaN layer, was fabricated via an electrochemical etching method in a hydrofluoric acid (HF) solution for the first time and then transferred onto quartz or n-Si substrates, acting as photoanodes during photoelectrochemical (PEC) water splitting in a 1 M NaCl aqueous solution. Compared to the as-grown GaN-based film, the transferred GaN-based thin films possess higher and blue-shifted light emission, presumably resulting from an increase in the surface area and stress relaxation in the InGaN/GaN layer embedded on the mesoporous n-GaN...
August 2, 2017: Nanoscale
Junyang Zhuang, Bin Han, Wenchao Liu, Jinfei Zhou, Kewei Liu, Dapeng Yang, Dianping Tang
Liposomes are an excellent candidate component for biosensors to transduce and amplify detection signals due to their outstanding ability in encapsulating signal marker compounds. However, the use of liposomes for photoelectrochemical (PEC) signal transduction has not yet been achieved due the lack of appropriate sensing strategy. Herein, we report on a novel liposomes-amplified PEC immunoassay (LAPIA) method for sensitive HIV-p24 antigen (p24) detection based on a split-type strategy. Initially, liposomes were encapsulated with alkaline phosphatase (ALP) in their hydrophilic chamber and conjugated with secondary antibody on the surface to form the ALP-encapsulated liposomes (ALP-Ls) based PEC signal label...
July 29, 2017: Biosensors & Bioelectronics
Pei Pei Liu, Xiaoqiang Liu, Xiao He Huo, Yunfei Tang, Jun Xu, Huangxian Ju
This work designed a nanocomposite to enhance the photoelectrochemical (PEC) efficiency by depositing BiVO4 nanoparticles on TiO2 nanospheres with a solvothermal method. The TiO2-BiVO4 heterostructure was characterized with various spectroscopic and microscopic techniques and was employed as a nanostructured support to cross-link DNA aptamer for constructing a visible-light driven PEC aptasensor. The TiO2 nanospheres provided a biocompatible microenvironment, and the high surface area of the heterostructure enhanced the loading of aptamer molecules...
August 16, 2017: ACS Applied Materials & Interfaces
Hui Liu, Kejing Zhang, Liyuan Chai, Zhihui Yang, Weichun Yang, Qi Liao, Huan Li, Yi Liu
To evaluate intensively the quality of the sediments contaminated by heavy metals and metalloids in the Xiangjiang River, 52 surface sediment samples were collected at 13 sites and different combinations of empirical and theoretical sediment quality indexes, the consensus-based sediment quality guidelines, sediment toxicity degree, and equilibrium partitioning method were applied. The average contents of Cd, Pb, Cu, Zn, Hg, Cr, and As in the sampled surface sediments were significantly higher than the background values of trace elements in soils of Hunan Province, China...
July 29, 2017: Archives of Environmental Contamination and Toxicology
John Kilgallon, Antonio Franco, Oliver R Price, Juliet E N Hodges
Many regulatory screening level exposure assessments are based on simple large scale conceptual scenarios. However, exposure, and therefore risks associated with chemicals, are characterised by high spatial variability. The Scenario assembly tool (ScenAT) is a global screening level model to enable spatially resolved local predictions of environmental concentrations of home and personal care chemicals. It uses the European Union Technical Guidance Document (TGD) equation to predict local scale freshwater concentrations (predicted environmental concentrations - PECs) of chemicals discharged via wastewater...
July 24, 2017: Environmental Pollution
Ying-Ning Zheng, Wen-Bin Liang, Cheng-Yi Xiong, Ying Zhuo, Ya-Qin Chai, Ruo Yuan
A universal ratiometric photoelectrochemical (PEC) bioassay, which could be readily expanded for ultrasensitive determination of various targets in complex biological matrixes, was established by coupling a target-nucleotide transduction-amplification with DNA nanomachine mediated electron-transfer tunneling distance regulation strategies. With the help of target-nucleotide transduction-amplification strategy, the one input target signal could be transducted to corresponding multiple output DNA signals by nucleotide specific recognition technology, simultaneously leading to an efficient signal amplification for target...
August 11, 2017: Analytical Chemistry
Wen-Chung Lu, Li-Chun Tseng, Kao-Shuo Chang
This study is the first to employ combinatorial hydrothermal synthesis and facile spin-coating technology to fabricate TiO2-reduced graphene oxide (rGO) nanorod composition spreads. The features of this study are (1) the development of a self-designed spin-coating wedge, (2) the systemic investigation of the structure-property relationship of the system, (3) the high-throughput screening of the optimal ratio from a wide range of compositions for photocatalytic and photoelectrochemical (PEC) applications, and (4) the effective coupling between the density gradient TiO2 nanorod array and the thickness gradient rGO...
August 8, 2017: ACS Combinatorial Science
Weiwei Lu, Bo Jia, Beilei Cui, Yuan Zhang, Kaisheng Yao, Yuling Zhao, Jian Ji Wang
Photoelectrochemical (PEC) reduction of CO2 is a potential way to produce fuels and chemicals by using C1-feedstock accumulated in the atmosphere. However, low solubility of CO2 in water and complicated processes of capture and conversion make the conversion efficiency quite low. In this study, a new conception of "ionic liquid assisted capture and conversion of CO2 in PEC system" is proposed and demonstrated by using 1-aminopropyl-3-methylimidazolium bromide aqueous solution as both the absorbent and electrolyte at ambient temperature and pressure...
July 25, 2017: Angewandte Chemie
Arnstein Finset
No abstract text is available yet for this article.
September 2017: Patient Education and Counseling
Camilo A Mesa, Andreas Kafizas, Laia Francàs, Stephanie R Pendlebury, Ernest Pastor, Yimeng Ma, Florian Le Formal, Matthew T Mayer, Michael Grätzel, James R Durrant
The kinetics of photoelectrochemical (PEC) oxidation of methanol, as a model organic substrate, on α-Fe2O3 photoanodes are studied using photoinduced absorption spectroscopy and transient photocurrent measurements. Methanol is oxidized on α-Fe2O3 to formaldehyde with near unity Faradaic efficiency. A rate law analysis under quasi-steady-state conditions of PEC methanol oxidation indicates that rate of reaction is second order in the density of surface holes on hematite and independent of the applied potential...
August 11, 2017: Journal of the American Chemical Society
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