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Emission tuning of highly efficient quaternary Ag-Cu-Ga-Se/ZnSe quantum dots for white light-emitting diodes.

J Colloid Interface Sci 2021 May 23;602:307-315. Epub 2021 May 23.

Institute for Electric Light Sources, School of Information Science and Technology, Fudan University, Shanghai 200433, China; Institute of Future Lighting, Academy for Engineering and Technology, Fudan University, Shanghai 200433, China; Zhongshan - Fudan Joint Innovation Center, Zhongshan 528437, China. Electronic address:

With the blooming development of zero-dimensional nanomaterials, I-III-VI alloying quantum dots (QDs) with outstanding photoelectrical properties have emerged to attract much attention as promising environmentally-friendly substitutions for conventional binary Cd-based QDs. In this work, a facile one-pot method was introduced to synthesize unreported quaternary Ag-Cu-Ga-Se/ZnSe (ACGSe/ZnSe) QDs. A relatively high photoluminescence quantum yield (PL QY) of 71. Read More

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Technical framework for wastewater-based epidemiology of SARS-CoV-2.

Sci Total Environ 2021 Jun 11;791:148271. Epub 2021 Jun 11.

Department of Pharmaceutical & Biological Engineering, School of Chemical Engineering, Sichuan University, Chengdu 610065, China. Electronic address:

Wastewater-based epidemiology (WBE) is expected to become a powerful tool to monitor the dissemination of SARS-CoV-2 at the community level, which has attracted the attention of scholars all over the world. However, there is not yet a standard protocol to guide its implementation. In this paper, we proposed a comprehensive technical and theoretical framework of relative quantification via qPCR for determining the virus abundance in wastewater and estimating the infection ratio in corresponding communities, which is expected to achieve horizontal and vertical comparability of the data using a human-specific biomarker as the internal reference. Read More

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Do working conditions contribute differently to gender gaps in self-rated health within different occupational classes? Evidence from the Swedish Level of Living Survey.

Authors:
Sara Kjellsson

PLoS One 2021 15;16(6):e0253119. Epub 2021 Jun 15.

Swedish Institute for Social Research, Stockholm University, Stockholm, Sweden.

Socioeconomic inequality in health among women is often referred to as smaller than health inequality among men. However, we know less about differences in health between men and women within the same socioeconomic groups. In this article the lack of attention to potential socioeconomic variation in gender health inequality is argued as unfortunate, as it can obscure how mechanisms, such as e. Read More

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Construction of a pH/TGase "Dual Key"-Responsive Gold Nano-radiosensitizer with Liver Tumor-Targeting Ability.

ACS Biomater Sci Eng 2021 Jun 15. Epub 2021 Jun 15.

Key Laboratory of Functional Polymer Materials of Ministry of Education, Institute of Polymer Chemistry, College of Chemistry, Nankai University, Tianjin 300071, People's Republic of China.

The method of tumor microenvironment (TME)-responsive aggregation has become a promising approach to enhance treatment effect by improving the accumulation of nanoparticles in tumors. The enzymatic cross-linking strategy has widely attracted attention owing to its good aggregation stability and biocompatibility. However, the enzymes in nontumor tissue can also catalyze the cross-linking reaction and reduce accumulation of nanoparticles in tumor. Read More

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Brain Exercising Games With Consumer-Grade Single-Channel Electroencephalogram Neurofeedback: Pre-Post Intervention Study.

JMIR Serious Games 2021 Jun 15;9(2):e26872. Epub 2021 Jun 15.

Department of Computer Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok, Thailand.

Background: The aging population is one of the major challenges affecting societies worldwide. As the proportion of older people grows dramatically, so does the number of age-related illnesses such as dementia-related illnesses. Preventive care should be emphasized as an effective tool to combat and manage this situation. Read More

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Negative Magnetoresistance in the GeSn Strip.

ACS Appl Mater Interfaces 2021 Jun 15. Epub 2021 Jun 15.

State Key Laboratory on Integrated Optoelectronics, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, P. R. China.

Discovery of topological materials associated with an exotic phenomenon has attracted increasing attention in modern condensed matter physics. A typical example is the chiral anomaly proposed in the Dirac or Weyl semimetals. In addition to the well-known topological semimetals, such as TaAs and NaBi, recently, group IV GeSn alloys were also proposed to be Dirac semimetals in theory, demonstrating potential applications compatible with current Si-based technology. Read More

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Effects of extended abstinence on cognitive functions in tramadol-dependent patients: A cohort study.

Neuropsychopharmacol Rep 2021 Jun 15. Epub 2021 Jun 15.

Department of Psychiatry, Assiut University, Assiut, Egypt.

Background: Some pieces of the literature report impaired cognitive functioning in tramadol dependence. Whether extended abstinence improves cognitive functioning or not is not well studied.

Aim: We aimed to measure the change in cognitive functioning following complete abstinence among individuals with tramadol dependence. Read More

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Are the advantages of chess expertise on visuo-spatial working-memory capacity domain specific or domain general?

Mem Cognit 2021 Jun 14. Epub 2021 Jun 14.

Department of Psychology, School of Behavioral and Brain Sciences, University of Texas at Dallas, Richardson, TX, 75080, USA.

Chess experts have repeatedly demonstrated exceptional recall of chessboards, which is weakened by disruption of the chessboard. However, chess experts still perform better than novices when recalling such disrupted chessboards, suggesting a somewhat generalized expertise effect. In the current study, we examined the extent of this generalized expertise effect on early processing of visuo-spatial working memory (VSWM), by comparing 14 chess experts (Elo rating > 2000) and 15 novices on a change-detection paradigm using disrupted chessboards, where attention had to be selectively deployed to either visual or spatial features, or divided across both features. Read More

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Switching Gears: A Self-Regulatory Approach and Measure of Nonwork Role Re-Engagement Following After-Hours Work Intrusions.

J Bus Psychol 2021 Jun 9:1-17. Epub 2021 Jun 9.

BetterUp, 1200 Folsom Street, San Francisco, CA 94103 USA.

As employees' personal lives are increasingly splintered by work demands, the boundary between work and nonwork domains is becoming ever more blurred. Grounded within a self-regulatory approach and the executive control function of inhibitory control, we operationalize and examine nonwork role re-engagement (NWRR)-the extent to which individuals can redirect attentional resources back to nonwork tasks following work-related intrusions. In phases 1 and 2, we develop and refine a psychometrically sound unidimensional measure for NWRR aligned with the self-regulatory processes of self-control and interference control underlying inhibitory control. Read More

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SCOAT-Net: A novel network for segmenting COVID-19 lung opacification from CT images.

Pattern Recognit 2021 Jun 10:108109. Epub 2021 Jun 10.

MOE Key Lab for Neuroinformation, School of Life Science and Technology, University of Electronic Science and Technology of China, Chengdu, China.

Automatic segmentation of lung opacification from computed tomography (CT) images shows excellent potential for quickly and accurately quantifying the infection of Coronavirus disease 2019 (COVID-19) and judging the disease development and treatment response. However, some challenges still exist, including the complexity and variability features of the opacity regions, the small difference between the infected and healthy tissues, and the noise of CT images. Due to limited medical resources, it is impractical to obtain a large amount of data in a short time, which further hinders the training of deep learning models. Read More

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On the permittivity of titanium dioxide.

Sci Rep 2021 Jun 14;11(1):12443. Epub 2021 Jun 14.

Physics Department, Centre for Materials Science and Nanotechnology, University of Oslo, Blindern, P.O. Box 1048, 0316, Oslo, Norway.

Conductive rutile TiO has received considerable attention recently due to multiple applications. However, the permittivity in conductive, reduced or doped TiO appears to cause controversy with reported values in the range 100-10,000. In this work, we propose a method for measurements of the permittivity in conductive, n-type TiO that involves: (i) hydrogen ion-implantation to form a donor concentration peak at a known depth, and (ii) capacitance-voltage measurements for donor profiling. Read More

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Time-domain based evaluation of detection efficiency in liquid scintillation counting.

Sci Rep 2021 Jun 14;11(1):12424. Epub 2021 Jun 14.

Université Paris-Saclay, CEA, LIST, Laboratoire National Henri Becquerel (LNE-LNHB), 91120, Palaiseau, France.

This work explores the distribution of time intervals between signals from the photomultiplier tubes (PMTs) of a liquid scintillation counting (LSC) system when a scintillation burst caused by an ionizing particle is detected. This distribution is termed the cross-correlation distribution and it is shown that it contains information about the probability to detect a scintillation event. A theoretical model that describes the cross-correlation distribution is derived. Read More

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Chitosan-driven skin-attachable hydrogel sensors toward human motion and physiological signal monitoring.

Carbohydr Polym 2021 Sep 23;268:118240. Epub 2021 May 23.

Polymeric and Soft Materials Laboratory, School of Chemistry and Life Science and Advanced Institute of Materials Science, Changchun University of Technology, Changchun 130012, China. Electronic address:

Recently, flexible and wearable sensors assembled from conductive hydrogels have attracted widespread attention. However, it is still a great challenge to make hydrogels with sufficient mechanical properties, self-adhesiveness and strain sensitivity. Here, a strong, tough, and self-adhesive hydrogel is successfully fabricated by a one-pot method, which introducing chitosan and 2-acrylamido-2-methylpropane sulfonic acid into the polyacrylamide network. Read More

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September 2021

Mental health interventions for healthcare workers during the first wave of COVID-19 pandemic in Spain.

Rev Psiquiatr Salud Ment (Engl Ed) 2021 Apr-Jun;14(2):83-89

Valdecilla Biomedical Research Institute (IDIVAL), Santander, Spain; Mental Health Centre, University Hospital "Marqués de Valdecilla", Santander, Spain; Faculty of Health Sciences, Universidad Europea del Atlántico, Santander, Spain.

Objective: In order to reduce distress associated with working with COVID-19 patients, several psychological intervention programmes for healthcare workers have been developed in Spain. We aimed to describe the main characteristics and components of these programmes for healthcare workers treating COVID-19 patients in Spanish hospitals.

Material And Methods: An online survey was designed to evaluate the main characteristics of psychological intervention programmes for healthcare workers during the first wave of COVID-19 pandemic. Read More

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October 2020

Treating Comorbid Childhood Bipolar Disorder and ADHD.

CNS Spectr 2021 Apr;26(2):172

Neuropsychology Center of Louisiana, Baton Rouge, LA, USA.

Objectives: Pediatric mania is difficult to distinguish from childhood hyperactivity. Both share 3 common symptoms: distractibility, motoric hyperactivity, and talkativeness. Oftentimes, children are referred from their pediatrician due to a lack of appropriate response to stimulant medication. Read More

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Who should I involve in my research and why? Patients, carers or the public?

Res Involv Engagem 2021 Jun 14;7(1):41. Epub 2021 Jun 14.

NCRI Consumer Forum, Sarcoma Patients Euronet, Shropshire, UK.

Patient and public involvement in research helps to make it more relevant and useful to the end-users. Involvement influences the design, delivery and dissemination of research, ultimately leading to better services, treatments and care. Researchers are therefore keen to involve patients, carers and public in their work, but are sometimes uncertain about who to involve. Read More

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Breastfeeding and employed mothers in Ethiopia: legal protection, arrangement, and support.

Int Breastfeed J 2021 Jun 14;16(1):45. Epub 2021 Jun 14.

College of Medicine and Health Science Ambo University, Ambo, Ethiopia.

Background: Breastfeeding is the single, most cost-effective intervention to reduce worldwide child mortality. Women empowerment interventions have positive impacts on child and maternal nutritional, and health status. Women's employment and economic participation in Ethiopia have shown progress over the past three decades. Read More

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Advancing discussion of ethics in mixed methods health services research.

BMC Health Serv Res 2021 Jun 15;21(1):577. Epub 2021 Jun 15.

Mixed Methods Research Training Program, Department of Mental Health, Johns Hopkins University Bloomberg School of Public Health, Baltimore, MD, USA.

Background: To describe the ethical issues and experiences of scientists conducting mixed methods health services research and to advance empirical and conceptual discussion on ethical integrity in mixed methods health research.

Methods: The study was conducted with 64 scholars, faculty and consultants from the NIH-funded Mixed Methods Research Training Program (MMRTP) for the Health Sciences. This was a cross-sectional study. Read More

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Iron-carbon microelectrolysis for wastewater remediation: Preparation, performance and interaction mechanisms.

Chemosphere 2021 Sep 3;278:130483. Epub 2021 Apr 3.

School of Environment, Key Laboratory for Yellow River and Huai River Water Environment and Pollution Control, Ministry of Education, Henan Key Laboratory for Environmental Pollution Control, Henan Normal University, Xinxiang, 453007, China.

Rapid industrialization and urbanization have produced a lot of hazardous substances in water and wastewater, which has turned into a crucial issue to the environment and the public health. Recently, iron carbon microelectrolysis (IC-ME) has attracted extensive attention in environmental remediation due to its low costs and excellent performance. Nevertheless, there is still a lack of a more systematic review on IC-ME preparation methods, their performance, and the interaction mechanisms of IC-ME in the remediation of wastewater. Read More

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September 2021

Atomically dispersed Fe atoms anchored on COF-derived N-doped carbon nanospheres as efficient multi-functional catalysts.

Chem Sci 2019 Nov 30;11(3):786-790. Epub 2019 Nov 30.

Department of Chemistry, Tsinghua University Beijing 100084 China

Non-noble metal isolated single atom site (ISAS) catalysts have attracted much attention due to their low cost, ultimate atom efficiency and outstanding catalytic performance. Herein, atomically dispersed Fe atoms are prepared by a covalent organic framework (COF)-absorption-pyrolysis strategy. The obtained Fe ISASs anchored on COF-derived N-doped carbon nanospheres (Fe-ISAS/CN) served as a multi-functional catalyst in electro-catalysis and organic catalysis, exhibiting better catalytic performance than commercial Pt/C for the ORR with good stability and methanol tolerance. Read More

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November 2019

Redox-responsive supramolecular polymeric networks having double-threaded inclusion complexes.

Chem Sci 2020 Mar 16;11(17):4322-4331. Epub 2020 Mar 16.

Department of Macromolecular Science, Graduate School of Science, Osaka University 1-1 Machikaneyama-cho Toyonaka Osaka 560-0043 Japan

Stimuli-responsive hydrogels have attracted attention as soft actuators that act similarly to muscles. In this work, hydrogel actuators controlled by host-guest interactions have been developed. The introduction of a 1:1 inclusion complex into a hydrogel is a popular design for achieving a change in cross-linking density. Read More

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A dual band spin-selective transmission metasurface and its wavefront manipulation.

Nanoscale 2021 Jun 15. Epub 2021 Jun 15.

Key Laboratory of Opto-Electronics Information Technology (Tianjin University), Ministry of Education, School of Precision Instruments and Opto-Electronics Engineering, Tianjin University, Tianjin, 300072, China.

Chiral metasurfaces which can achieve different optical responses for left-handed and right-handed circularly polarized (CP) light have been proposed. Most of the research studies on chiral metasurfaces focus on improving circular dichroism (CD) and realizing dynamic manipulation of the chiro-optical response. However, there have only been a few reports on the multi-band chiro-optical response. Read More

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Effect of Thickness and Stacking Order on Raman Spectrum of Layered CrCl3.

J Phys Condens Matter 2021 Jun 14. Epub 2021 Jun 14.

School of Physics and Electronic Sciences, Changsha University of Science and Technology, Changsha, Hunan Province, Hunan 410004, Changsha, 410114, CHINA.

Layer- and stacking-dependent physical properties discovered in van der Waals materials have attracted a lot of attention recently. In this work, we have investigated the Raman spectrum of layered magnetic CrCl3with different atomic thickness and stacking order from first principles. Our study indicates Raman shift of Rand C2/m phase is near degenerate except that the first and fourth Raman resonant modes exhibit a marked peak difference about 3 cm-1, which can be understood by stacking-dependent vibrational eigenvectors. Read More

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Optical modulation frequency mediated tunable response time and responsivity in graphene-PbS QD based hybrid photodetectors.

Nanotechnology 2021 Jun 14. Epub 2021 Jun 14.

CEA de Grenoble, Avenue des Martyrs, Grenoble, 38054, FRANCE.

Graphene/lead sulfide (PbS) quantum dot (QD) hybrid infrared photodetectors have gained a lot of attention in recent times due to their high resolution and cost effective fabrication process. In spite of exhibiting remarkably high responsivity, such hybrid detectors are slow as a result of their internal gain mechanism process. In this work, we present a convenient strategy to modulate the correlation between their responsivity and response time giving access to high resolution fast photodetectors in the broadband wavelength range for imaging purpose. Read More

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Perfluoroalkyl and polyfluoroalkyl substances (PFAS) in groundwater at a reclaimed water recharge facility.

Sci Total Environ 2021 Jun 3;791:147906. Epub 2021 Jun 3.

Department of Hydrology and Atmospheric Sciences, The University of Arizona, Tucson, AZ 85721, USA; Department of Environmental Science, The University of Arizona, Tucson, AZ 85721, USA.

Reclaimed water is becoming an increasingly important source of water in arid regions worldwide. In the City of Tucson, Arizona, reclaimed water comprises approximately 10% of the annual water supply. It is used to recharge the local aquifer, create surface flow in the Santa Cruz River, and irrigate parks, golf courses, and recreational fields. Read More

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A novel print-and-release method to prepare microplastics using an office-grade laserjet printer; a low-cost solution for preliminary studies.

Mar Pollut Bull 2021 Jun 11;170:112601. Epub 2021 Jun 11.

Department of Mechanical & Aerospace Engineering, College of Engineering & Computer Science, University of Central Florida, Orlando, FL, USA. Electronic address:

Microscopic plastic particles (microplastics) are widespread anthropogenic contaminants that are impacting aquatic ecosystems. Among the five most prevalent types of microplastics (polystyrene, polyamide, polyvinyl chloride, polyethylene, and polypropylene) in aquatic environments, the impact of polystyrene, polyethylene, and polypropylene has drawn more attention due to their high transportability. A lack of reliable inexpensive methods to accurately replicate the realistic microplastic samples extracted from environmental matrixes with the desired size and geometry is one of the main challenges in the design of experiments for systematic studies. Read More

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Modular Synthesis of Amphiphilic Chitosan Derivatives Based on Copper-Free Click Reaction for Drug Delivery.

Int J Pharm 2021 Jun 11:120798. Epub 2021 Jun 11.

State Key Laboratory of Natural Medicines, Jiangsu Key Laboratory of Drug Discovery for Metabolic Diseases, Center of Advanced Pharmaceuticals and Biomaterials, China Pharmaceutical University, Nanjing 210009, P.R. China. Electronic address:

Amphiphilic chitosan derivatives have attracted wide attention as drug carriers due to their physicochemical properties. However, obtaining a desired amphiphilic chitosan derivative by tuning the various functional groups was complex and time-consuming. Therefore, a facile and common synthesis strategy would be promising. Read More

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Stop touching your face! A systematic review of triggers, characteristics, regulatory functions and neuro-physiology of facial self touch.

Neurosci Biobehav Rev 2021 Jun 11. Epub 2021 Jun 11.

University of Leipzig, Paul-Flechsig-Institute for Brain Research, Haptic Research Lab, 04103 Leipzig, Germany. Electronic address:

Spontaneous face touching (sFST) is an ubiquitous behavior that occurs in people of all ages and all sexes, up to 800 times a day. Despite their high frequency, they have rarely been considered as an independent phenomenon. Recently, sFST have sparked scientific interest since they contribute to self-infection with pathogens. Read More

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Considerations for buffering agent selection for frozen rAAV2 mediated gene therapy products.

J Pharm Sci 2021 Jun 11. Epub 2021 Jun 11.

Voyager Therapeutics, Biopharmaceutical Development, Lexington, MA 02421.

The buffering component selection is a key criterion for the formulation development process for biopharmaceuticals. This decision for recombinant adeno-associated virus (rAAV) mediated gene therapies is receiving special attention due to their rise in clinical trials which may require high concentration, frozen supply chain, and direct delivery to eye and central nervous system related sites. In the present study, we investigate the impact of rates of freezing and thawing on rAAV2 as a model serotype. Read More

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Semi-analytical modelling and evaluation of uniformly doped silicene nanotransistors for digital logic gates.

PLoS One 2021 14;16(6):e0253289. Epub 2021 Jun 14.

Faculty of Engineering, School of Electrical Engineering, Universiti Teknologi Malaysia, Skudai, Johor, Malaysia.

Silicene has attracted remarkable attention in the semiconductor research community due to its silicon (Si) nature. It is predicted as one of the most promising candidates for the next generation nanoelectronic devices. In this paper, an efficient non-iterative technique is employed to create the SPICE models for p-type and n-type uniformly doped silicene field-effect transistors (FETs). Read More

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