21,155 results match your criteria solid carbon

An in vitro assessment for human skin exposure to parabens using magnetic solid phase extraction coupled with HPLC.

Chemosphere 2021 Jul 17;286(Pt 1):131593. Epub 2021 Jul 17.

State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan, 430074, China. Electronic address:

Skin contact was a significant source of human exposure to parabens during the use of personal care products. In this study, a novel and simple in vitro evaluation method for human skin exposure to parabens was established for the first time. Firstly, magnetic porous carbon (MPC) derived from discarded cigarette butts was prepared as an adsorbent of magnetic solid-phase extraction (MSPE), which provided a fast and efficient sample preparation method with satisfactory extraction performance for parabens in cosmetics and was easy to couple with high performance liquid chromatography. Read More

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N,O-codoped carbon spheres with uniform mesoporous entangled CoO nanoparticles as a highly efficient electrocatalyst for oxygen reduction in a Zn-air battery.

J Colloid Interface Sci 2021 Jul 10;604:746-756. Epub 2021 Jul 10.

State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an 710049, PR China. Electronic address:

Highly efficient electrochemical catalysts for oxygen reduction reactions (ORRs) are urgently needed for various energy conversion and storage devices to overcome sluggish ORR kinetics. Here, N,O-codoped carbon spheres with uniform mesopores and a high specific surface area were used as supports for decorating CoO nanoparticles via a facile immersion route. In addition to the benefit of ions and gas mass transfer, the abundant mesopores present in the three-dimensional (3D) carbon spheres also confine and isolate the CoO nanoparticles growing in it, which help to provide rich CoO active sites. Read More

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Transforming C Molecules into Polyhedral Carbon Micro-Nano Shells for Electrochemically Producing HO in Neutral Electrolytes.

ACS Appl Mater Interfaces 2021 Jul 22. Epub 2021 Jul 22.

CAS Key Laboratory of Design and Assembly of Functional Nanostructures, and Fujian Key Laboratory of Nanomaterials, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, China.

The electrochemical production of hydrogen peroxide (HO) via the two-electron oxygen reduction reaction (ORR) can realize the customer-oriented onsite synthesis of HO in a green and sustainable method. The ongoing challenge that needs to be solved is the fabrication of robust electrocatalysts of excellent performance. In this work, C was selected as a precursor due to its uniform structure and abundant pentagon rings. Read More

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A Novel Luminescent "Nanochip" as a Tandem Catalytic System for Chemiluminescent Detection of Sweat Glucose.

Anal Chem 2021 Jul 22. Epub 2021 Jul 22.

National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures, Chemistry and Biomedicine Innovation Center, College of Engineering and Applied Sciences, Jiangsu Key Laboratory of Artificial Functional Materials, Nanjing University, Nanjing 210093, China.

Accurate sweat glucose detection is a promising alternative to invasive finger-prick blood tests, allowing for self-monitoring of blood glucose with good patient compliance. In this study, we have developed a tandem catalytic system, termed as a luminescent "nanochip" (LAON), which was composed of gold nanoparticles (AuNPs) and -(aminobutyl)--(ethylisoluminol) (ABEI)-engineered oxygen-doped carbon nitride (O-g-CN), for chemiluminescent detection of sweat glucose. The LAON exhibits dual catalytic activity of glucose oxidase and peroxidase and can not only oxidize glucose to generate HO but catalyze HO-mediated luminol chemiluminescence, resulting in sensitive detection of glucose. Read More

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Computationally Designed Crystal Structures of the Supertetrahedral GaC and GaSi Solids.

J Phys Chem A 2021 Jul 22. Epub 2021 Jul 22.

Institute of Physical and Organic Chemistry, Southern Federal University, Rostov-on-Don 344090, Russian Federation.

The structural, mechanical, electrical, and optical properties of new supertetrahedral structures -GaX (X = C, Si) were studied by using a solid state DFT calculation. The crystal structures of -GaX are built based on a diamond crystal lattice, in which pairs of adjacent carbon atoms are replaced by GaX fragments, where Ga is a tetrahedron of gallium atoms. Calculations have shown that new mixed-type supertetrahedral structures are dynamically stable, have densities of 3. Read More

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Growth Characteristics of Polyporales Mushrooms for the Mycelial Mat Formation.

Mycobiology 2021 26;49(3):280-284. Epub 2021 Apr 26.

Department of Bio and Medical Big Data (BK4 program) and Research Institute of Life Sciences, Gyeongsang National University, Jinju, Republic of Korea.

Mushroom strains of Polyporales from the genera , , , , and were explored in terms of mycelial growth characteristics for the application of mushroom mycelia as alternative sources of materials replacing fossil fuel-based materials. Among the 64 strains of Polyporales, LBS5496GL was selected as the best candidate because it showed fast mycelial growth with high mycelial strength in both the sawdust-based solid medium and the potato dextrose liquid plate medium. Some of the Polyporales in this study have shown good mycelial growth, however, they mostly formed mycelial mat of weak physical strength. Read More

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High-Throughput Solid-Phase Assay for Substrate Profiling and Directed Evolution of Transketolase.

Chembiochem 2021 Jul 21. Epub 2021 Jul 21.

Universite Clermont Auvergne et associes, Institut de Chimie de Clermont-Ferrand (ICCF), UMR 6296 CNRS, 24 avenue Blaise Pascal, 63177, Aubière, FRANCE.

Thiamine diphosphate-dependent enzymes, and specifically transketolases, form one of the most important families of biocatalytic tools for enantioselective carbon-carbon bond formation yielding various hydroxyketones of biological interest. To enable substrate profiling of transketolases for acceptance of different donors and acceptors, a simple, direct colorimetric assay based on pH reaction variation was developed to establish a high-throughput solid-phase assay. This assay reduces the screening effort in the directed evolution of transketolases, as only active variants are selected for further analysis. Read More

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Ordered Mesoporous Alumina with Tunable Morphologies and Pore Sizes for CO Capture and Dye Separation.

ACS Appl Mater Interfaces 2021 Jul 21. Epub 2021 Jul 21.

School of Materials Science and Engineering, Nanyang Technological University, 639798 Singapore.

We describe a versatile and scalable strategy toward long-range and periodically ordered mesoporous alumina (AlO) structures by evaporation-induced self-assembly of a structure-directing ABA triblock copolymer (F127) mixed with aluminum tri--butoxide-derived sol additive. We found that the separate preparation of the alkoxide sol-gel reaction before mixing with the block copolymer enabled access to a relatively unexplored parameter space of copolymer-to-additive composition, acid-to-metal molar ratio, and solvent, yielding ordered mesophases of two-dimensional (2D) lamellar, hexagonal cylinder, and 3D cage-like cubic lattices, as well as multiscale hierarchical ordered structures from spinodal decomposition-induced macro- and mesophase separation. Thermal annealing in air at 900 °C yielded well-ordered mesoporous crystalline γ-AlO structures and hierarchically porous γ-AlO with 3D interconnected macroscale and ordered mesoscale pore networks. Read More

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Excellent Deformable Oxide Glass Electrolytes and Oxide-Type All-Solid-State LiS-Si Batteries Employing These Electrolytes.

ACS Appl Mater Interfaces 2021 Jul 21. Epub 2021 Jul 21.

National Institute of Advanced Industrial Science and Technology (AIST), Central 5, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8565, Japan.

Oxide-type all-solid-state lithium-ion batteries have attracted great attention as a candidate for a next-generation battery with high safety performance. However, batteries based on oxide systems exhibit much lower energy densities and rate performances than liquid-type lithium-ion batteries, owing to the difficulty in preparing the ion- and electron-transfer path between particles. In this study, LiSO-LiCO-LiX (X = Cl, Br, and I) glass systems are investigated as highly deformable and high-ionic-conductive oxide electrolytes. Read More

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Exsolution of Ni Nanoparticles from A-Site-Deficient Layered Double Perovskites for Dry Reforming of Methane and as an Anode Material for a Solid Oxide Fuel Cell.

ACS Appl Mater Interfaces 2021 Jul 21. Epub 2021 Jul 21.

Univ Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes) - UMR 6226, F-35000 Rennes, France.

Exsolution is a promising technique to design metal nanoparticles for electrocatalysis and renewable energy. In this work, Ni-doped perovskites, (PrBa)MnNiO with = 0, 0.05, 0. Read More

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Alkalinity Concentration Swing for Direct Air Capture of Carbon Dioxide.

ChemSusChem 2021 Jul 20. Epub 2021 Jul 20.

Harvard University, School of Engineering and Applied Sciences, UNITED STATES.

We describe a new process - the Alkalinity Concentration Swing (ACS) - for direct air capture of carbon dioxide driven by concentrating an alkaline solution that has been exposed to the atmosphere and loaded with dissolved inorganic carbon. Upon concentration, the partial pressure of \ce{CO2} increases, allowing for extraction and compression. We find that higher concentration factors result in proportionally higher outgassing pressure, and higher initial alkalinity concentrations at the same concentration factor outgas a higher concentration of \ce{CO2}. Read More

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Universal Fluorination-Created Edge C-F Groups in Networks of Multidimensional Carbon Materials.

J Phys Chem Lett 2021 Jul 21:7026-7033. Epub 2021 Jul 21.

National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures, and Jiangsu Provincial Key Laboratory for Nanotechnology, Nanjing University, Nanjing 210093, China.

Fluorination can significantly change the physical and chemical properties of carbon materials (CMs). Common sense for the fluorination mechanism for CMs indicates that one basal-plane C-F group (CF group) can form as one fluorine atom bonded to one carbon atom along the out-of-plane carbon networks without creating edge C-F groups (including CF and CF groups) at vacancies in carbon networks. We report that fluorination can generally create edge C-F groups in multidimensional CMs such as graphite, graphene, carbon nanotubes, and fullerene, and the concentration of edge C-F groups is dependent on both the crystallinity of starting CMs and the fluorination pressure and temperature. Read More

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Ammonium salt production in NH-CO-HO system using a highly selective adsorbent, copper hexacyanoferrate.

Environ Pollut 2021 Jul 7;288:117763. Epub 2021 Jul 7.

Nanomaterials Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1 Higashi, Tsukuba, 305-8565, Japan. Electronic address:

Ammonia is a beneficial material that is widely used in agriculture, but its emission into the atmosphere causes air pollution. Recently, Prussian blue (PB) and its analogs (PBA) were found to be ammonia adsorbents with high selectivity and capacity. In this study, we utilized a highly potent PBA adsorbent, copper hexacyanoferrate (CuHCF), to desorb ammonia and turn it into a reusable form. Read More

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Immunoassay of SARS-CoV-2 nucleocapsid proteins using novel red emission-enhanced carbon dot-based silica spheres.

Analyst 2021 Jul 20. Epub 2021 Jul 20.

Jiangsu Province Hi-Tech Key Laboratory for Bio-medical Research, School of Chemistry and Chemical Engineering, Southeast University, Nanjing 211189, China.

It is imminent to develop a new type of rapid COVID-19 detection method with high sensitivity. Here, we used novel red emission-enhanced carbon dot (CD)-based silica (RCS) spheres as the signals of lateral flow immunochromatography (LFI) to ultrasensitively detect novel severe acute respiratory syndrome coronavirus 2 nucleocapsid proteins (SARS-CoV-2 NPs). The red emission of CDs can be enhanced and enriched in silica spheres by a simple way. Read More

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Laser texturing of a St. Jude Medical mechanical heart valve prosthesis: the proof of concept.

Interact Cardiovasc Thorac Surg 2021 Jul 19. Epub 2021 Jul 19.

Zernike Institute for Advanced Materials, University of Groningen, Groningen, Netherlands.

Objectives: The liquid-solid interactions have attracted broad interest since solid surfaces can either repel or attract fluids, configuring a wide spectrum of wetting states (from superhydrophilicity to superhydrophobicity). Since the blood-artificial surface interaction of bileaflet mechanical heart valves essentially represents a liquid-solid interaction, we analysed the thrombogenicity of mechanical heart valve prostheses from innovative perspectives. The aim of the present study was to modify the surface wettability of standard St. Read More

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TiO/g-CN photocatalyst for the purification of potassium butyl xanthate in mineral processing wastewater.

J Environ Manage 2021 Jul 16;297:113311. Epub 2021 Jul 16.

College of Chemical Engineering, Beijing University of Chemical Technology, Beijing, 100029, China.

In the present work, TiO-graphite-phase-carbon-nitride (TiO/g-CN) was prepared through a hydrothermal method to obtain a new photocatalytic material. This material was characterized by means of scanning electron microscope (SEM), transmission electron microscope (TEM), X-ray energy spectrometer (EDS), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectroscopy (FT-IR), Solid-state UV-Vis diffuse reflectance spectrometry (UV-Vis-DRS) and electron paramagnetic resonance (EPR). The synthesized TiO/g-CN exhibited homogeneous morphology, in which TiO nanoparticles were uniformly distributed on the g-CN nanosheets. Read More

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Feed digestibility, digesta passage and faecal microbial biomass in desert-adapted goats exposed to mild water restriction.

J Anim Physiol Anim Nutr (Berl) 2021 Jul 18. Epub 2021 Jul 18.

Soil Biology and Plant Nutrition, University of Kassel, Witzenhausen, Germany.

In arid and semi-arid environments, extensively managed ruminants regularly experience drinking water shortage, especially in the dry season. The present study therefore investigated the effects of mild drinking water restriction on feed intake, feed digestibility, solid digesta passage and composition of faeces including faecal microbial biomass. A feeding trial was conducted in Oman, during the dry summer months. Read More

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One-Pot Synthesis of High-Performance Tin Chalcogenides/C Anodes for Li-Ion Batteries.

ACS Omega 2021 Jul 30;6(27):17391-17399. Epub 2021 Jun 30.

Institute for Advanced Study, Shenzhen University, Shenzhen 518060, China.

Tin chalcogenides are considered as promising anode materials for lithium-ion batteries (LIBs) due to their high theoretical lithium-storage capacity. Herein, we have successfully synthesized the composites of tin chalcogenides and graphite, that is, SnS/C, SnSe/C, and SnSSe/C, via a simple one-pot solid-state method. During the electrochemical test, they exhibit excellent lithium-storage ability and cyclic performance as the anode electrodes of LIBs due to the introduction of carbon. Read More

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Enhancing Lithium-Storage Performance via Graphdiyne/Graphene Interface by Self-Supporting Framework Synthesized.

ACS Appl Mater Interfaces 2021 Jul 19. Epub 2021 Jul 19.

Fujian Provincial Industry Technologies Development Base for New Energy, College of Energy, Xiamen University, Xiamen 361102, P. R. China.

The self-supporting graphdiyne/exfoliated graphene (GDY/EG) composites materials were prepared by the solvothermal method and applied as lithium-ion batteries (LIBs). Graphdiyne (GDY) is a new type of carbon allotrope with a natural macroporous structure, but its conductivity is poor. A small amount of highly conductive graphene can improve surface conductivity and facilitate electron transport. Read More

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Insights into Superlow Friction and Instability of Hydrogenated Amorphous Carbon/Fluid Nanocomposite Interface.

ACS Appl Mater Interfaces 2021 Jul 18. Epub 2021 Jul 18.

Computational Science Center, Korea Institute of Science and Technology, Seoul 136-791, Republic of Korea.

Hydrogenated amorphous carbon (a-C:H) film exhibits the superlubricity phenomena as rubbed against dry sliding contacts. However, its antifriction stability strongly depends on the working environment. By composting with the fluid lubricant, the friction response and fundamental mechanisms governing the low-friction performance and instability of a-C:H remain unclear, while they are not accessible by experiment due to the complicated interfacial structure and the lack of advanced characterization technique in situ. Read More

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Mitigation of acidogenic product inhibition and elevated mass transfer by biochar during anaerobic digestion of food waste.

Bioresour Technol 2021 Jul 13;338:125531. Epub 2021 Jul 13.

Hunan International Scientific and Technological Cooperation Base of Agricultural Typical Pollution Remediation and Wetland Protection, College of Resources and Environment, Hunan Agricultural University, Changsha 410128, China. Electronic address:

Anaerobic digestion (AD) of food waste is widely accepted as a promising technology for both waste disposal and resource recovery. With the advancing of AD technology, to exploit the capacity of organic waste for maximum energy/resource recovery becomes the new focus and hence, improve the viability of this technology for practical application. Product inhibition and mass transfer are the common limitations encountered during AD of putrescible organic waste. Read More

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Decomposing the decoupling of plastics consumption and economic growth in G7 and China: Evidence from 2001 to 2020 based on China's import ban.

J Environ Manage 2021 Jul 14;296:113225. Epub 2021 Jul 14.

China Institute for Urban Governance, Shanghai Jiao Tong University, Shanghai, 200030, China; Shanghai Engineering Research Center of Solid Waste Treatment and Resource Recovery, School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China. Electronic address:

Plastic recycling is critical for dematerializing of plastics. It has a profound implication on decoupling economic growth from environmental pressure and advancing waste plastic governance domestically and internationally while identifying drivers that might improve decoupling. In this study, plastic consumption and recycling patterns are presented, and the factors influencing the acceleration of dematerialization subsequent to the ban were investigated in the G7 countries and China. Read More

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Recent Progress in Amorphous Carbon-based Materials for Anodes of Sodium-ion Batteries: From Synthesis Strategies, Mechanisms to Performance.

ChemSusChem 2021 Jul 16. Epub 2021 Jul 16.

Shanghai University, 99 Shangda Road, Shanghai, CHINA.

Sodium-ion batteries (SIBs) are gaining renewed interest as a promising alternative to the already commercialized lithium-ion batteries. The large abundance, low-cost and similar electrochemistry of sodium (with lithium) is attracting attention to the research community for their deployment in energy storage devices. Despite the fact that there are sufficient cathode materials, the choice of suitable anodes for SIBs is limited. Read More

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Mass Absorption Efficiency of Black Carbon from Residential Solid Fuel Combustion and Its Association with Carbonaceous Fractions.

Environ Sci Technol 2021 Jul 16. Epub 2021 Jul 16.

Laboratory for Earth Surface Process, College of Urban and Environmental Sciences, Peking University, Beijing 100871, People's Republic of China.

Black carbon (BC) emissions, derived primarily from incomplete fuel combustion, significantly affect the global and regional climate. Mass absorption efficiency (MAE) is one important parameter in evaluating the climate impacts of BC. Here, values and variabilities in the MAE of BC (MAE) from real-world residential emissions were investigated from a field campaign covering 163 burning events for different fuel-stove combinations. Read More

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The phase diagram of carbon dioxide from correlation functions and a many-body potential.

J Chem Phys 2021 Jul;155(2):024503

Department of NanoEngineering and Chemical Engineering, University of California San Diego, La Jolla, San Diego, California 92023, USA.

The phase stability and equilibria of carbon dioxide are investigated from 125-325 K and 1-10 000 atm using extensive molecular dynamics (MD) simulations and the Two-Phase Thermodynamics (2PT) method. We devise a direct approach for calculating phase diagrams, in general, by considering the separate chemical potentials of the isolated phase at specific points on the P-T diagram. The unique ability of 2PT to accurately and efficiently approximate the entropy and Gibbs energy of liquids allows for assignment of phase boundaries from relatively short (∼100 ps) MD simulations. Read More

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Spatial distribution and morphological transformation of chromium with coexisting substances in tannery landfill.

Chemosphere 2021 Jul 9;285:131503. Epub 2021 Jul 9.

College of Architecture and Environment, Sichuan University, Chengdu, 610065, China. Electronic address:

The prosperity and development of tannery industry have brought about rapid economic growth. However, the tannery landfill without anti-seepage measures in the early stage has generated masses of environmental hazards owing to the lack of awareness in environmental protection. Therefore, it is imperative to pay much attention to the understanding of environmental hazards from tannery waste. Read More

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Biologically removing vanadium(V) from groundwater by agricultural biomass.

J Environ Manage 2021 Jul 12;296:113244. Epub 2021 Jul 12.

Sino-Dutch R&D Centre for Future Wastewater Treatment Technologies, Key Laboratory of Urban Stormwater System and Water Environment, Beijing University of Civil Engineering and Architecture, Beijing, 100044, China. Electronic address:

Vanadium (V) in groundwater can pose a serious threat on both environment and health. Agricultural biomass contains solid carbon source (SCS) and could be attractive for biologically removing V(V). For this purpose, cypress sawdust, corn cob and wheat straw were selected as SCSs to remove vanadate (NaVO). Read More

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Carbonized biosorbent assisted matrix solid-phase dispersion microextraction for active compounds from functional food.

Food Chem 2021 Jul 6;365:130545. Epub 2021 Jul 6.

College of Pharmacy, School of Medicine, Hangzhou Normal University, Hangzhou 311121, PR China; College of Material Chemistry and Chemical Engineering, Hangzhou Normal University, Hangzhou 311121, PR China. Electronic address:

In this study, mangosteen peel based activated carbon was prepared and first applied as adsorbent in matrix solid-phase dispersion (MSPD) for simultaneously extraction of flavonoids from Dendrobium huoshanense prior to their separation and determination by ultra-high performance liquid chromatography coupled with quadrupole time-of-flight tandem mass spectrometry (UHPLC-Q-TOF/MS). The MSPD-UHPLC-Q-TOF/MS method was validated exhaustively. Good linearities (r ≥ 0. Read More

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Environmental persistent free radicals in diesel engine exhaust particles at different altitudes and engine speeds.

Sci Total Environ 2021 Jul 9;796:148963. Epub 2021 Jul 9.

Stockbridge School of Agriculture, University of Massachusetts, Amherst, MA 01003, United States.

The occurrence of environmental persistent free radicals (EPFRs) in the environment has attracted a great deal of research attention. Although the major sources of EPFRs in the environment is diesel engine exhaust, the study on the emission characteristics of EPFRs at different working conditions is still very limited. An integrated engine system was adopted to simulate different working conditions of various altitudes and engine speeds, and to examine the emission process of a diesel engine. Read More

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Deep Blue Fluorescent Material with an Extremely High Ratio of Horizontal Orientation to Enhance Light Outcoupling Efficiency (44%) and External Quantum Efficiency in Doped and Non-Doped Organic Light-Emitting Diodes.

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

Center for Organic Photonics and Electronics Research (OPERA), Kyushu University, 744 Motooka, Nishi, Fukuoka 819-0395, Japan.

A novel bis-4Ph-substituted 9,10-dipehnylanthracene deep blue [1931 CIE (0.15, 0.08)] fluorescent compound, , has been synthesized and characterized for organic light-emitting diode (OLED) applications. Read More

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