475,622 results match your criteria Carbon Dioxide Laser Surgery in Gynecology


Sestrin 2 Attenuates Rat Hepatic Stellate Cell (HSC) Activation and Liver Fibrosis via an mTOR/AMPK-Dependent Mechanism.

Cell Physiol Biochem 2018 Dec 6;51(5):2111-2122. Epub 2018 Dec 6.

Department of Infectious Diseases, The Third Affiliated Hospital of Wenzhou Medical University, Rui'an,

Background/aims: Sestrin 2 is associated with the pathophysiology of several diseases. The aim of this study was to investigate the effects and potential mechanisms of Sestrin 2 in rat hepatic stellate cells (HSCs) during liver fibrogenesis.

Methods: In this study, Sestrin 2 protein expression was detected in rat HSC-T6 cells challenged with transforming growth factor-β (TGF-β) and in mice treated with carbon tetrachloride (CCl4), a well-known model of hepatic fibrosis. Read More

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December 2018
2 Reads

Removal of per- and polyfluoroalkyl substances using super-fine powder activated carbon and ceramic membrane filtration.

J Hazard Mater 2018 Nov 15;366:160-168. Epub 2018 Nov 15.

Department of Civil and Environmental Engineering, Colorado School of Mines, 1500 Illinois St, Golden, CO 80401, USA. Electronic address:

Contamination of drinking water sources with per- and polyfluoroalkyl substances (PFASs) is a major challenge for environmental engineers. While granular activated carbon (GAC) is an effective adsorbent-based treatment technology for long-chained PFASs, GAC is less effective for removal of short-chained compounds, necessitating a more complete treatment strategy. Super-fine powder activated carbon (SPAC; particle diameter <1 um) is potentially a superior adsorbent to GAC due to high specific surface area and faster adsorption kinetics. Read More

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November 2018
2 Reads

The legacy of colonial fire management policies on traditional livelihoods and ecological sustainability in savannas: Impacts, consequences, new directions.

J Environ Manage 2018 Dec 3;232:600-606. Epub 2018 Dec 3.

Darwin Centre for Bushfire Research, Charles Darwin University, Darwin, Australia. Electronic address:

Land occupation and management systems have defined fire regimes and landscapes for millennia. The savanna biome is responsible for 86% of all fire events, contributes to 10% of the total carbon emissions annually and is home to 10% of the human population. European colonization has been associated with the implementation of fire suppression policies in many tropical savanna regions, markedly disrupting traditional fire management practices and transforming ecosystems. Read More

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December 2018
2 Reads

Discovery and development of small molecule modulators targeting glutamine metabolism.

Eur J Med Chem 2018 Nov 28;163:215-242. Epub 2018 Nov 28.

Jiangsu Key Laboratory of Drug Design and Optimization, Department of Medicinal Chemistry, China Pharmaceutical University, 24 Tongjiaxiang, Nanjing 210009, PR China. Electronic address:

Cancer cells have been confirmed diverge significantly from normal cells on the metabolic properties. Energy production in cancer cells is abnormally dependent on the glycolysis pathway and other atypical metabolic characteristics such as increased fatty acid synthesis and increased rates of glutamine metabolism. Among these metabolic features of cancers, glutamine metabolism has been reported to be the main energy supply for the growth and viability of a potentially large subset of malignant tumors. Read More

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November 2018
5 Reads
3.447 Impact Factor

Full length foot orthoses have an immediate treatment effect and modify gait of children with idiopathic toe walking.

Gait Posture 2018 Nov 20;68:227-231. Epub 2018 Nov 20.

Monash University, School of Primary and Allied Health Care, Frankston, VIC, 3199, Australia; Peninsula Health, Allied Health, 4 Hastings Rd, Frankston, VIC, 3199, Australia.

Background: There remains a substantial lack of evidence to support the use of foot orthoses as a conservative treatment option for idiopathic toe walking (ITW). Encouraging heel contact during gait is one of the primary goals of most interventions in paediatric ITW.

Research Question: Does the combined treatment of high-top boots and orthoses increase the number of heel contacts during gait and change spatio-temporal gait parameters?

Methods: This within subject designed randomised controlled trial recruited fifteen children diagnosed with ITW (n = 10 males). Read More

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November 2018
2 Reads

A sensitive biosensing method for detecting of ultra-trace amounts of AFB1 based on "Aptamer/reduced graphene oxide" nano-bio interaction.

Colloids Surf B Biointerfaces 2018 Dec 1;175:98-105. Epub 2018 Dec 1.

Department of Chemistry, Payame Noor University (PNU), P.O. Box: 19395-4697, Tehran, Iran. Electronic address:

A simple, low-cost and sensitive label-free aptasensor assembled with assisting reduced graphene oxide nanosheets as the signal amplifier was fabricated and applied for detecting ultra-low levels of Aflatoxin B1(AFB1) through a nano-bio interaction system. The conditions of different modified glassy carbon electrodes as the base of aptasensor were investigated by cyclic voltammetry (CV), differential pulse voltammetry (DPV) and electrochemical impedance spectroscopy (EIS). The performance of the fabricated aptasensor was evaluated by FESEM, HRTEM and AFM images. Read More

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December 2018

One-pot carbonization of chitosan/P123/PdCl blend hydrogel membranes to N-doped carbon supported Pd catalytic composites for Ullmann reactions.

Int J Biol Macromol 2018 Dec 3. Epub 2018 Dec 3.

Zhejiang Key Laboratory of Alternative Technologies for Fine Chemicals Process, Shaoxing University, Shaoxing 312000, China. Electronic address:

Novel porous nitrogen-doped carbon supported Pd (Pd@N-C) catalytic composites were prepared by one-pot thermal carbonization of chitosan/poly(ethylene glycol)‑block‑poly(propylene glycol)‑block‑poly(ethylene glycol)/PdCl (CS/P123/PdCl) blend hydrogel membranes at different temperature in N atmosphere. The porous structure of the Pd@N-C catalytic composite was governed by both the addition of P123 and the carbonization temperature. At highest carbonization temperature of 900 °C, the prepared Pd@N-C catalytic composite from CS/P123/PdCl blend membrane showed the highest specific area (S) of 293. Read More

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December 2018
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Carbon disulfide induces embryo loss by perturbing the expression of the mTOR signalling pathway in uterine tissue in mice.

Chem Biol Interact 2018 Dec 3. Epub 2018 Dec 3.

Department of Occupational and Environmental Health, School of Public Health, Shandong University, China. Electronic address:

Understanding of the mechanism of embryo loss is critical for successful pregnancy considering an increase in the incidence of infertility. In this study, we focus on the effect of alterations in the expression of the AKT/AMPK/mTOR signalling pathway in mouse uterine tissue after embryo loss induced by harmful environmental exposure to carbon disulfide (CS). CS is a material used in certain production processes, and women are sometimes exposed to it in occupational settings. Read More

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December 2018

The accumulation of metals, PAHs and alkyl PAHs in the roots of Echinacea purpurea.

PLoS One 2018 6;13(12):e0208325. Epub 2018 Dec 6.

Department of Biology, University of Ottawa, Ottawa, ON, Canada.

We examined the accumulation of polycyclic aromatic hydrocarbons (PAHs), alkyl PAHs, and toxic metals in soils by the roots of Echinacea purpurea (L.) Moench, in a 20-week greenhouse study and a 2-year field study. In the greenhouse study, inoculation by arbuscular mycorrhizal fungus (AMF), Rhizoglomus intraradices (N. Read More

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December 2018
1 Read

Effects of turbulent aggregation on clay floc breakup and implications for the oceanic environment.

PLoS One 2018 6;13(12):e0207809. Epub 2018 Dec 6.

Remote Sensing Division, U.S. Naval Research Laboratory, Washington D.C., United States of America.

Understanding how turbulence impacts marine floc formation and breakup is key to predicting particulate carbon transport in the ocean. While floc formation and sinking rate has been studied in the laboratory and in-situ, the breakup response to turbulence has attracted less attention. To address this problem, the breakup response of bentonite clay particles flocculated in salt water was studied experimentally. Read More

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December 2018

Effect of positive carbon-11-choline PET/CT results in the therapeutic management of prostate cancer biochemical relapse.

Nucl Med Commun 2019 Jan;40(1):79-85

Department of Nuclear Medicine, Marqués de Valdecilla University Hospital, Molecular Imaging Group (IDIVAL), University of Cantabria, Santander, Spain.

Objective: Carbon-11-(C)-choline PET/computed tomography (CT) has shown good results in re-staging of prostate cancer (PCa) with raised serum levels of prostate-specific antigen. Our aim was to evaluate the effect of positive C-choline PET/CT results in the therapeutic management of patients with PCa with biochemical relapse (BR) after curative intention treatment.

Patients And Methods: A total of 112 patients with PCa BR and positive C-choline PET/CT were retrospectively evaluated. Read More

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January 2019

The MJA-Lancet Countdown on health and climate change: Australian policy inaction threatens lives.

Med J Aust 2018 Dec;209(11):474

School of Public Health, University of Sydney, Sydney, NSW.

Climate plays an important role in human health and it is well established that climate change can have very significant impacts in this regard. In partnership with The Lancet and the MJA, we present the inaugural Australian Countdown assessment of progress on climate change and health. This comprehensive assessment examines 41 indicators across five broad sections: climate change impacts, exposures and vulnerability; adaptation, planning and resilience for health; mitigation actions and health co-benefits; economics and finance; and public and political engagement. Read More

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December 2018
1 Read

Ventilatory responses to acute hypoxia and hypercapnia in humans with a patent foramen ovale.

J Appl Physiol (1985) 2018 Dec 6. Epub 2018 Dec 6.

School of Health and Exercise Science, University of British Columbia, Canada.

Subjects with a patent foramen ovale (PFO) have blunted ventilatory acclimatization to high altitude, compared to subjects without PFO. The blunted response observed could be due to differences in central and/or peripheral respiratory chemoreflexes. We hypothesized that compared to subjects without a PFO (PFO-), subjects with a PFO (PFO+) would have blunted ventilatory responses to acute hypoxia and hypercapnia. Read More

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December 2018
1 Read

On the Electrochemical Degradation of Pt-Ni Nanocatalysts: An Identical Location Aberration-Corrected STEM Study.

Nano Lett 2018 Dec 6. Epub 2018 Dec 6.

The evolution of PtNi nanopartiles supported on amorphous carbon is investigated before and after electrochemical potential cycling (0.6-1.1V), using aberration-corrected STEM and EDS. Read More

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December 2018
2 Reads

Graphene Quantum Dots-Mediated Theranostic Penetrative Delivery of Drug and Photolytics in Deep Tumors by Targeted Biomimetic Nanosponges.

Nano Lett 2018 Dec 6. Epub 2018 Dec 6.

Dual targeted delivery of drugs and energy by nanohybrids can potentially alleviate side effects and improve the unique features required for precision medicine. To realize this aim, however, the hybrids which are often rapidly removal from circulation and piled up tumors periphery near the blood vessels must address the difficulties in low blood half-lives and tumor penetration. In this study, a sponge-inspired carbon composites-supported red blood cell (RBC) membrane that doubles as a stealth agent and photolytic carrier that transports tumor-penetrative agents (graphene quantum dots and docetaxel (GQD-D)) and heat with irradiation was developed. Read More

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December 2018

Legacy and Emerging Persistent Organic Pollutants (POPs) in Terrestrial Compartments in the High Arctic: Sorption and Secondary Sources.

Environ Sci Technol 2018 Dec 6. Epub 2018 Dec 6.

Department of Geography and Planning , Queen's University , Kingston , Ontario K7L 3N6 , Canada.

Legacy persistent organic pollutants (POPs) such as polychlorinated biphenyls (PCBs), organochlorine pesticides (OCPs), and emerging perfluoroalkyl substances (PFASs) were measured in vegetation and soil samples collected at remote lakes in the Canadian High Arctic. Field studies were carried out in 2015 and 2016 to assess concentrations of POPs, study the relevant sorbing phases, and determine whether Arctic soils were sinks or sources of legacy POPs to the atmosphere and to neighboring lakes. The patterns of legacy POPs in vegetation and soils were dominated by low molecular weight PCB congeners along with OCPs, confirming the importance of long-range atmospheric transport. Read More

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December 2018

A Radical Approach to Enzymatic β-Thioether Bond Formation.

J Am Chem Soc 2018 Dec 6. Epub 2018 Dec 6.

Ribosomally-synthesized and post-translationally-modified peptides (RiPPs) are an emerging class of natural products that harbor diverse chemical functionalities, usually introduced via the action of a small number of tailoring enzymes. We have been interested in RiPP biosynthetic gene clusters that encode unusual metalloenzymes, as these may install yet unknown alterations. Using a new bioinformatic search strategy, we recently identified an array of unexplored RiPP gene clusters that are quorum sensing-regulated and contain one or more uncharacterized radical S-adenosylmethionine (RaS) metalloenzymes. Read More

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December 2018
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Pt-C Interfaces Based on Electronegativity-Functionalized Hollow Carbon Spheres for Highly Efficient Hydrogen Evolution.

ACS Appl Mater Interfaces 2018 Dec 6. Epub 2018 Dec 6.

State Key Laboratory of Heavy Oil Processing, Institute of New Energy , China University of Petroleum (East China) , Qingdao 266580 , P. R. China.

The hydrogen evolution reaction activity of carbon-supported Pt catalyst is highly dependent on Pt-C interfaces. Herein, we focus on the relationships between Pt activity and N/O-functionalized hollow carbon sphere (HCS) substrate in acidic media. The electrochemical dissolution of Pt counter electrode is performed to prepare Pt nanoparticles in low loading. Read More

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December 2018

Spray-Printed and Self-Assembled Honeycomb Electrodes of Silicon-Decorated Carbon Nanofibers for Li-Ion Batteries.

ACS Appl Mater Interfaces 2018 Dec 6. Epub 2018 Dec 6.

Directional, micron-scale honeycomb pores in Li-ion battery electrodes were fabricated using a layer-by-layer, self-assembly approach based on spray printing of carbon nanofibers. By controlling the drying behavior of each printed electrode layer through optimization of (i) the volume ratio of fugitive bi-solvent carriers in the suspension, and (ii) the substrate temperature during printing, self-assembled, honeycomb pore channels through the electrode were created spontaneously and reliably on current collector areas larger than 20 cm × 15 cm. The honeycomb pore structure promoted efficient Li-ion dynamics at high charge/discharge current densities. Read More

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December 2018
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High Energy Density Micro-Supercapacitor based on Three-Dimensional Bicontinuous Porous Carbon with Interconnected Hierarchical Pore.

ACS Appl Mater Interfaces 2018 Dec 6. Epub 2018 Dec 6.

On-chip micro-supercapacitors (MSCs) are attracting great attentions recently. However, the performance of MSC is usually unsatisfactory due to the unreasonable pore structure. The construction of three-dimensional (3D) interconnected porous carbon based MSC by controllable activation is proposed. Read More

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December 2018
1 Read

Variability of arterial and peripheral venous blood gases parameters in subjects with stable obstructive pulmonary disease

Rev Med Inst Mex Seguro Soc 2018 11 30;56(4):342-346. Epub 2018 Nov 30.

Instituto Mexicano del Seguro Social, Hospital de Cardiología, Departamento de Hipertensión Pulmonar y Corazón Derecho. Ciudad de México, México

Background: Peripheral venous blood gases may be useful in subjects with exacerbation of chronic obstructive pulmonary disease to evaluate their gas exchange.

Objective: To describe the variability of parameters of arterial and peripheral venous blood gases in subjects with stable obstructive pulmonary disease.

Methods: Cross-sectional design, consecutive subjects were studied in a blinded manner, while arterial and peripheral venous blood was obtained for analysis. Read More

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November 2018

Single molecule magnet behaviors of ZnLn (Ln = Dy, Tb) complexes with multidentate organic ligands formed by absorption of CO in air through in situ reactions.

Dalton Trans 2018 Dec 6. Epub 2018 Dec 6.

School of Chemistry and Environmental Engineering, Key Laboratory of Green Chemical Process of Ministry of Education, Wuhan Institute of Technology, Wuhan 430074, P. R. China.

In this work, we report the syntheses, crystal structures and magnetic properties of three novel Zn-Ln mixed metal complexes, namely [Zn4Dy2(L1)2(L2)2(N3)2]Cl2·2H2O (1), [Zn4Tb2(L1)2(L2)2(Cl)2][ZnN3Cl3]·2H2O (2), and [Zn4Gd2(L1)2(L2)2(Cl)2][ZnN3Cl3]·2H2O (3), in which L12- and L23- were formed from the ligand L [L = N1,N3-bis(3-methoxysalicylidene)diethylenetriamine] through in situ reactions. Interestingly, carbon dioxide in air was absorbed in the process of forming carbamate ligand L23-; this can be ascribed to the insertion of CO2 into M-N amide bonds. Moreover, 1 and 2 represent the first series of 3d-4f SMMs containing carbamate ligands by fixation of CO2 in air. Read More

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December 2018
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Rational design and observation of the tight interface between graphene and ligand protected nanocrystals.

Phys Chem Chem Phys 2018 Dec 6. Epub 2018 Dec 6.

Center for Nanoparticle Research, Institute for Basic Science (IBS), Seoul 08826, Republic of Korea and School of Chemical and Biological Engineering, Institute of Chemical Process, Seoul National University, Seoul 08826, Republic of Korea.

Heterostructures constructed of graphene and colloidal nanocrystals provide a unique way to exploit the coupled physical properties of the two functional building blocks. Studying the interface structure between the two constituent materials is important to understand the formation mechanism and the resulting physical and chemical properties. Along with ab initio calculations, we elucidate that the bending rigidity and the strong van der Waals interaction of graphene to the metal surface guide the formation of a tight and conformal interface. Read More

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December 2018
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Highly efficient and stable air-processed hole-transport-material free carbon based perovskite solar cells with caesium incorporation.

Chem Commun (Camb) 2018 Dec 6. Epub 2018 Dec 6.

Key Laboratory of Artificial Micro/Nano Structures of Ministry of Education, School of Physics and Technology, Wuhan University, Wuhan, 430072, China.

An inorganic caesium cation was incorporated into perovskite to improve the performance and stability of solar cells with a hole-transport-material free structure in ambient air. A triple cation device with a champion power conversion efficiency of over 15% was achieved, exhibiting superior thermal, long-term and operational stabilities. Read More

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December 2018
3 Reads

Protein gradients on the nucleoid position the carbon-fixing organelles of cyanobacteria.

Elife 2018 Dec 6;7. Epub 2018 Dec 6.

Department of Biochemistry, Michigan State University, East Lansing, United States.

Carboxysomes are protein-based bacterial organelles encapsulating key enzymes of the Calvin-Benson-Bassham cycle. Previous work has implicated a ParA-like protein (hereafter McdA) as important for spatially organizing carboxysomes along the longitudinal axis of the model cyanobacterium PCC 7942. Yet, how self-organization of McdA emerges and contributes to carboxysome positioning is unknown. Read More

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December 2018
1 Read

A Functional Macrophage Migration Inhibitory Factor (MIF) Promoter Polymorphism is Associated with Reduced Diffusing Capacity.

Am J Physiol Lung Cell Mol Physiol 2018 Dec 6. Epub 2018 Dec 6.

Pulmonary and Critical Care, Yale University School of Medicine, United States.

Cigarette smoke exposure is the leading modifiable risk factor for COPD, however the clinical and pathologic consequences of chronic cigarette smoke exposure are variable amongst smokers. MIF (Macrophage Migration Inhibitory Factor) is a pleiotropic cytokine implicated in the pathogenesis of Chronic Obstructive Pulmonary Disease (COPD). Within the promoter of the MIF gene is a functional polymorphism that regulates MIF expression (-794 CATT microsatellite repeat) ( rs5844572). Read More

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December 2018

Fabrication of Opaline ZnO Photonic Crystal Film and its Slow Photon Effect on Photoreduction of Carbon Dioxide.

Langmuir 2018 Dec 6. Epub 2018 Dec 6.

Monodisperse ZnO particles with adjustable size have been produced on a large scale by two-step seeding-growth polyol reactions. Through spin coating of supersaturated ZnO/DEG solution and evaporation of solvent, opaline ZnO photonic crystal (PC) film with good crystallinity and uniform photonic structures can be prepared from these ZnO particles. Compared with a disorderly stacked ZnO film, the ZnO PC film shows higher activity in photocatalytic reduction of CO2 because of the generated slow photons at the edge of photonic bandgap and their promotion to the light absorption. Read More

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December 2018

Fragmentation of Valence and Carbon Core Excited and Ionized CHFCF Molecule.

J Phys Chem A 2018 Dec 6. Epub 2018 Dec 6.

The photofragmentation dynamics of 1,1,1,2-tetrafluoroethane (R134a) with photon energies from 12 eV up to 320 eV, surrounding the C 1s edge is discussed. The ionic moieties were measured according to their mass to charge ratio, in coincidence with the photoelectrons (PEPICO mode), and collected as a function of the incident photon energy. In the C K core region, the fragmentation patterns are examined in terms of site specific excitation of the CH2FCF3 molecule. Read More

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December 2018

Robustly Superhydrophobic Conductive Textile for Efficient Electromagnetic Interference Shielding.

ACS Appl Mater Interfaces 2018 Dec 6. Epub 2018 Dec 6.

Superhydrophobic electromagnetic interference (EMI) shielding textile (EMIST) is of great significance to the safety and long-term service of all-weather outdoor equipment. However, it is still challenging to achieve long-term durability and stability under external mechanical deformations or other harsh service conditions. Herein, by designing and implementing silver nanowire (AgNW) networks and a superhydrophobic coating onto a commercial textile, we demonstrate a highly robust superhydrophobic EMIST. Read More

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December 2018

Electronic versus steric control in palladium complexes of carboranyl phosphine-iminophosphorane ligands.

Dalton Trans 2018 Dec 6. Epub 2018 Dec 6.

Departamento de Química Inorgánica, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain.

A new family of carboranyl phosphine-iminophosphorane ligands was prepared and characterized. The new ligands present a carboranyl group directly attached to the iminophosphorane nitrogen atom through a cage carbon atom (C-carboranyl derivatives L1-L3) or through the B3 boron atom (B-carboranyl derivatives L4 and L5), and the phosphine group on a side chain derived from the diphosphine dppm, i.e. Read More

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December 2018

Reduced graphene oxide wrap buffering volume expansion of MnSnO anodes for enhanced stability in lithium-ion batteries.

Dalton Trans 2018 Dec 6. Epub 2018 Dec 6.

Department of Environmental Science and Engineering, University of Shanghai for Science and Technology, Shanghai 200093, P.R. China.

MSnO4 (M = Mn, Zn, Co, Mg, etc.) has been widely investigated as an anode material for lithium-ion batteries in recent years, but its practical applications are limited by serious capacity loss caused by severe volume expansion during Li+ insertion/extraction. So far, hollow structures, carbon coating, and encapsulation by reduced graphene oxide have been introduced to improve the electrochemical properties of MSnO4. Read More

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December 2018

Self-ordering promoted by the nanoconfinement of poly(3-hexylthiophene) and its nanocomposite with single-walled carbon nanotubes.

Nanotechnology 2019 Feb;30(5):055603

Institut des Matériaux Jean Rouxel (IMN), Université de Nantes, CNRS, 2 rue de la Houssinière, BP 32229, F-44322 Nantes cedex 3, France. Laboratoire de Recherche LR 18ES19, Synthèse asymétrique et ingénierie moléculaire de matériaux organiques pour l'électronique organique, Faculté des Sciences de Monastir, University of Monastir, 5000 Monastir, Tunisia.

Nanostructuration and self-ordering of semiconducting organic materials are required to fabricate highly efficient photovoltaic and photoemissive devices. In this work, we investigated the combined effect of melt-assisted template processing and self-ordering of high purity regio-regular poly (3-hexylthiophene) (P3HT) to obtain nanofibers of P3HT and of P3HT-single-walled carbon nanotubes (SWNT) nanocomposites. An original ordering of the polymer and the carbon nanotubes within the nanofibers, as well as their surprising anisotropic photoluminescent properties were determined by vibrational and optical spectroscopy. Read More

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February 2019
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On the Intrinsic Reactivity of Diatomic 3d Transition-Metal Carbides in the Thermal Activation of Methane: Striking Electronic Structure Effects.

J Am Chem Soc 2018 Dec 6. Epub 2018 Dec 6.

Mechanistic aspects of the C-H bond activation of methane by metal-carbide cations MC of the 3d transition-metals Sc - Zn were elucidated by NEVPT2//CASSCF quantum-chemical calculations, and verified experimentally for M = Ti, V, Fe and Cu by using Fourier transform ion-cyclotron resonance mass spectrometry. While MC species with M = Sc, Ti, V, Cr, Cu, and Zn activate CH at ambient temperature, this is prevented with carbide cations of M = Mn, Fe, and Co by high apparent barriers; NiC has a small apparent barrier. Hydrogen-atom transfers from methane to metal-carbide cations were found to proceed via a proton-coupled electron transfer mechanism for M = Sc - Co; wherein the doubly-occupied π-orbitals between metal and carbon at the carbon site serve as electron donors and the corresponding metal-centered vacant π*-orbitals as electron acceptors. Read More

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December 2018

Nitrogen-doped carbon materials for the metal-free reduction of nitro compounds.

ACS Appl Mater Interfaces 2018 Dec 6. Epub 2018 Dec 6.

In this study, nitrogen-doped carbon materials (labeled as NC-T) were easily prepared by the thermal treatment of the melamine-chitosan composite. NC-T catalysts demonstrated a good activity towards the reduction of nitro compounds by the use of hydrazine hydrate (N2H4•H2O) as the reductant. The activity of NC-T enhanced with the rise of the pyrolysis temperature because of the enhanced ratio of graphitic-type nitrogen, which should be the active sites for reduction of nitro compounds. Read More

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December 2018
2 Reads

Highly Efficient Hydrogen Production via a Reformed Electrolysis System Driven by One Single Perovskite Solar Cell.

ChemSusChem 2018 Dec 5. Epub 2018 Dec 5.

Huazhong University of Science & Technology, Wuhan National Laboratory for Optoelectronics, 1037 Luoyu Road, Wuhan, China, 430074, Wuhan, China, CHINA.

Highly efficient hydrogen production by photovoltaic-driven electrolysis system requires low overpotential of electrolyzer and high couple efficiency of both components. Herein, we firstly propose Ni5P4 as cost-effective bifunctional electrocatalyst for hydrogen evolution and hydrazine oxidation in a reformed electrolyzer and experimentally validated that the electrolytic overpotential can be significantly reduced via replacing oxygen evolution reaction with hydrazine oxidation reaction at the anode. Furthermore, we conceive a novel scenario for hydrogen production by utilization of a low-cost and stable perovskite solar cell featuring with carbon back electrode to drive a reformed electrolyzer. Read More

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December 2018
1 Read

Puffing up Energetic Metal-organic Frameworks to Large Carbon Networks with Hierarchical Porosity and Atomically Dispersed Metal Sites.

Angew Chem Int Ed Engl 2018 Dec 6. Epub 2018 Dec 6.

National Institute of Advanced Industrial Science and Technology (AIST), 1-8-31 Midorigaoka, , 563-8577, Ikeda, JAPAN.

Large carbon networks featuring hierarchical pores and atomically dispersed metal sites (ADMSs) are ideal materials for energy storage and conversion due to the spatial-continuous conductive networks and highly active ADMSs. However, it is a challenge to synthesize such ADMS-decorated carbon networks. Here, we innovatively present a fusion-foaming methodology to puff up energetic metal-organic framework (EMOF) nanoparticles to submillimetric ADMS-decorated carbon networks via one-step pyrolysis. Read More

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December 2018

Carbon-Supported Divacancy-Anchored Platinum Single-Atom Electrocatalysts with Superhigh Pt Utilization for Oxygen Reduction Reaction.

Angew Chem Int Ed Engl 2018 Dec 5. Epub 2018 Dec 5.

Changchun Institute of Applied Chemistry, State Key Laboratory of Electroanalytical Chemistry, 5625 Renmin Street, 130022, Changchun, CHINA.

Maximizing the platinum utilization in electrocatalysts toward oxygen reduction reaction (ORR) is very desirable for large-scale sustainable application of Pt in energy systems. Here, we report a cost-effective carbon-supported carbon-defect-anchored platinum single-atom electrocatalysts (Pt1/C) with remarkable ORR performance. Impressively, the acidic H2/O2 single cell with Pt1/C as the cathode delivers a maximum power density of 520 mW cm-2 at 80 °C, corresponding to a superhigh platinum utilization of 0. Read More

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December 2018

Dramatically Enhanced Li-Ion Storage of ZnO@C Anodes through TiO Homogeneous Hybridization.

Chemistry 2018 Dec 6. Epub 2018 Dec 6.

School of Materials Science and Engineering and, Guangdong Provincial Key Laboratory of, Advanced Energy Storage Materials, South China University of, Technology, Guangzhou, 510641, P.R. China.

Amorphous nanoparticles of ZnO and TiO embedded in carbon nanocages (AZT⊂CNCs) were successfully synthesized through a simple annealing process of TiO -coated zeolitic imidazolate framework-8 (ZIF-8). In the current anode of AZT⊂CNCs, tiny ZnO and TiO nanoparticles were uniformly distributed in the carbon matrix (carbon nanocages), which could effectively buffer the volume expansion of electroactive ZnO and provide excellent electric conductivity. After fully investigating the electrochemical performance of the AZT⊂CNCs samples obtained with different additive amounts of tetrabutyl orthotitanate (TBOT) for TiO coating, it has been found that AZT-30 (0. Read More

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December 2018
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Are We Justified in Introducing Carbon Monoxide Testing to Encourage Smoking Cessation in Pregnant Women?

Authors:
Catherine Bowden

Health Care Anal 2018 Dec 5. Epub 2018 Dec 5.

School of Law, The University of Manchester, Oxford Road, Manchester, M13 9PL, UK.

Smoking is frequently presented as being particularly problematic when the smoker is a pregnant woman because of the potential harm to the future child. This premise is used to justify targeting pregnant women with a unique approach to smoking cessation including policies such as the routine testing of all pregnant women for carbon monoxide at every antenatal appointment. This paper examines the evidence that such policies are justified by the aim of harm prevention and argues that targeting pregnant women in this way is likely to do more harm than good. Read More

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December 2018

Schisandrin B Improves the Renal Function of IgA Nephropathy Rats Through Inhibition of the NF-κB Signalling Pathway.

Inflammation 2018 Dec 5. Epub 2018 Dec 5.

Department of Nephrology, Affiliated Hospital of Southwest Medical University, No. 25, Tai Ping Street, Jiangyang District, 646000, Luzhou, China.

Schisandrin B (SchB) is an active compound extracted from the Chinese herb Schisandra chinensis and shows excellent anti-inflammatory activity. This study was performed to examine the effects of SchB in a rat model of IgA nephropathy (IgAN). IgAN was established in Sprague-Dawley rats by immunization with lipopolysaccharide (LPS), bovine serum albumin, and carbon tetrachloride. Read More

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December 2018

The enhanced lipid productivity of Chlorella minutissima and Chlorella pyrenoidosa by carbon coupling nitrogen manipulation for biodiesel production.

Environ Sci Pollut Res Int 2018 Dec 5. Epub 2018 Dec 5.

Department of Microbiology, SVKM's Mithibai College of Arts, Chauhan Institute of Science & Amrutben Jivanlal College of Commerce and Economics, Vile Parle West, Mumbai, Maharashtra, 400056, India.

Biodiesel production from microalgae has been researched extensively and attempted to commercialize on a large scale, but there are major hurdles in the production process like harvesting and low lipid content, which should be studied to enhance the process and make it economical. Present study aimed to improve the lipid productivity of Chlorella minutissima and Chlorella pyrenoidosa by modifying the carbon and nitrogen content of the medium. Both organisms were grown in BG11 medium for the first 6 days and thereafter grown in a modified BG11 medium completely deprived of nitrogen for 2 to 10 days. Read More

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December 2018
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Continuous degradation of Direct Red 23 by calcium pectate-bound Ziziphus mauritiana peroxidase: identification of metabolites and degradation routes.

Environ Sci Pollut Res Int 2018 Dec 5. Epub 2018 Dec 5.

Department of Biochemistry, Faculty of Life Sciences, Aligarh Muslim University, Aligarh, U.P., 202002, India.

In the present study, oxido-reductive degradation of diazo dye, Direct Red 23, has been carried out by Ziziphus mauritiana peroxidases (specific activity 17.6 U mg). Peroxidases have been immobilized via simple adsorption and cross-linking by glutaraldehyde; adsorbed and cross-linked enzyme retained 94. Read More

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December 2018
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Oxygen reserve index (ORi™) contributes to prediction of hypoxemia and patient safety during tracheal stent insertion using rigid bronchoscopy: a case report.

J Clin Monit Comput 2018 Dec 5. Epub 2018 Dec 5.

Department of Anesthesiology and Critical Care Medicine, Jichi Medical University, 3311-1 Yakushiji, Shimotsuke-Shi, Tochigi-Ken, 329-0498, Japan.

The oxygen reserve index (ORi™) is a new noninvasive and continuous variable, which represents a moderate hyperoxygenation status, with a unitless scale between 0.00 and 1.00. Read More

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December 2018

Transcription profiles reveal the regulatory mechanisms of spur bud changes and flower induction in response to shoot bending in apple (Malus domestica Borkh.).

Plant Mol Biol 2018 Dec 5. Epub 2018 Dec 5.

College of Mechaincal and Electronic Engineering, Northwest A & F University, Yangling, 712100, Shaanxi, China.

Key Message: Shoot bending, as an effective agronomic measure, has been widely used to promote flowering in 'Fuji' apple trees. Here, we examined the transcriptional responses of genes in 'Fuji' apple buds at different flowering stages under a shoot-bending treatment using RNA sequencing. A complex genetic crosstalk-regulated network, involving abscisic acid-related genes, starch metabolism and circadian rhythm-related genes, as well as stress response-related genes, was up-regulated by shoot bending, in which were contrbuted to apple flower bud formation in response to shoot-bending conditions. Read More

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December 2018
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One-Step Mask-Based Diffraction Lithography for the Fabrication of 3D Suspended Structures.

Nanoscale Res Lett 2018 Dec 5;13(1):394. Epub 2018 Dec 5.

State Key Lab of Digital Manufacturing Equipment and Technology, Huazhong University of Science and Technology, Wuhan, 430074, People's Republic of China.

We propose a novel one-step exposure method for fabricating three-dimensional (3D) suspended structures, utilizing the diffraction of mask patterns with small line width. An optical model of the exposure process is built, and the 3D light intensity distribution in the photoresist is calculated based on Fresnel-Kirchhoff diffraction formulation. Several 3D suspended photoresist structures have been achieved, such as beams, meshes, word patterns, and multilayer structures. Read More

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December 2018

1,1-Diaryl compounds as important bioactive module in pesticides.

Mol Divers 2018 Dec 5. Epub 2018 Dec 5.

College of Science, China Agricultural University, No. 2, Yuanmingyuan West Road, Haidian District, Beijing, 100193, China.

1,1-Diaryl compounds are a series of compounds which possess two aryl groups attached to a central carbon atom. This special structure made it as a very important module in bioactive molecules, and compounds of this type are numerous. 1,1-Diaryl derivatives can be used as catalysts in chemical synthesis, chemical probes and biologically active molecules for medicines and pesticides. Read More

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December 2018

Resolving X-ray photoelectron spectra of ionic liquids with difference spectroscopy.

Phys Chem Chem Phys 2018 Dec 6. Epub 2018 Dec 6.

School of Chemistry, The University of Nottingham, University Park, Nottingham, UK.

X-ray photoelectron spectroscopy (XPS) is a powerful element-specific technique to determine the composition and chemical state of all elements in an involatile sample. However, for elements such as carbon, the wide variety of chemical states produce complex spectra that are difficult to interpret, consequently concealing important information due to the uncertainty in signal identity. Here we report a process whereby chemical modification of carbon structures with electron withdrawing groups can reveal this information, providing accurate, highly refined fitting models far more complex than previously possible. Read More

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December 2018

The Influence of Suspension Containing Nanodiamonds on the Morphology of the Tooth Tissue Surface in Atomic Force Microscope Observations.

Biomed Res Int 2018 5;2018:9856851. Epub 2018 Nov 5.

Department of Material Science, Technical University of Liberec, Studentská 1402/2, 46117 Liberec 1, Czech Republic.

Reduced friction and wear of materials after the use of the carbon nanomaterials including nanodiamonds (NDs) have been confirmed by several studies in material engineering. Mechanical cleaning of the tooth surface by brush bristles should leave as little tissue roughened as possible. Higher surface roughness increases the tissue's wear and encourages the redeposition of the bacteria and the colouring agents present in the diet. Read More

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November 2018
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Carbon Dioxide Laser Microsurgery versus Low-Temperature Plasma Radiofrequency Ablation for T1a Glottic Cancer: A Single-Blind Randomized Clinical Trial.

Biomed Res Int 2018 1;2018:4295960. Epub 2018 Nov 1.

Department of Otolaryngology, The Third Hospital of Wuhan City, Wuhan, Hubei Province, China.

Background: Very few studies have been conducted to compare carbon dioxide laser microsurgery (CO2-LS) with low-temperature plasma radiofrequency ablation (LTP-RFA) in treating T1a glottic cancer. Therefore, we conducted this study to compare the efficacy of CO2-LS and LTP-RFA to define a superior therapeutic modality for T1a glottic cancer.

Methods: Patients (n=131) with T1a glottic cancer were recruited between January 2010 and September 2014. Read More

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November 2018