Read by QxMD icon Read


C V Manohar, Tiago Correia Mendes, Mega Kar, Dabin Wang, Changlong Xiao, Maria Forsyth, Sagar Mitra, Douglas R MacFarlane
Sodium-ion batteries (SIBs) are widely considered as alternative, sustainable, and cost-effective energy storage devices for large-scale energy storage applications. In this work, an easily fabricated sodium vanadium phosphate-carbon composite (NVP@C) cathode material shows a good rate capability, and long cycle life (89% capacity retention after 5000 cycles at a rate of 10C) with an ionic liquid electrolyte for room temperature sodium metal batteries. The electrochemical performance of a full-cell sodium ion battery with NVP@C and hard carbon electrodes was also investigated at room temperature with an ionic liquid electrolyte...
March 22, 2018: Chemical Communications: Chem Comm
Nuket Kartal Temel, Ramazan Gürkan
A novel ultrasound assisted-cloud point extraction method was developed for preconcentration and determination of V(V) in beverage samples. After complexation by pyrogallol in presence of safranin T at pH 6.0, V(V) ions as ternary complex are extracted into the micellar phase of Triton X-114. The complex was monitored at 533 nm by spectrophotometry. The matrix effect on the recovery of V(V) from the spiked samples at 50 μg L-1 was evaluated. In optimized conditions, the limits of detection and quantification of the method, respectively, was 0...
March 2018: Acta Chimica Slovenica
Haibo Tang, Junming Luo, Xin Long Tian, Yuanyuan Dong, Jing Li, Mingrui Liu, Lina Liu, Huiyu Song, Shijun Liao
Developing cheap and stable electrocatalysts to replace Pt for the oxygen reduction reaction (ORR) is recognized as the key factor to achieve the large-scale application of fuel cells. In this paper, 3D porous Co-doped vanadium nitride (VN) nanosheet-assembled microflowers are prepared with a facile solvothermal approach followed by nitridation at 500°C in NH3. It is found that the microflower morphology and the Co doping both significantly enhance the ORR performance of the materials. Since the unique 3D porous structure provides higher specific surface area and more active sites as well as enriching the d electrons of V via doping, Co also improves the intrinsic activity of VN...
March 21, 2018: ACS Applied Materials & Interfaces
Jinxiao Guo, Huaijuan Zhou, Jiaxing Wang, Wei Liu, Mengqi Cheng, Xiaochun Peng, Hui Qin, Jianfeng Wei, Ping Jin, Jinhua Li, Xianlong Zhang
Vanadium is a trace element in the human body, and vanadium compounds have a promising future in biological and medical applications due to their various biological activities and low toxicity. Herein, a novel pure vanadium dioxide (VO2 ) nanofilm was deposited on a substrate of biomedical titanium by magnetron sputtering. The antibacterial effect of VO2 against the methicillin-resistant Staphylococcus aureus (MRSA) was validated in vitro and in vivo. Moreover, the biocompatibility of VO2 and its osteogenic effects were systematically illustrated...
March 21, 2018: Artificial Cells, Nanomedicine, and Biotechnology
Ying Huang, Fang Liu, Fang Zhang, Pingsheng Liu, Tao Xu, Wenjun Ding
Numerous studies have demonstrated that vanadium compounds are able to improve lipemia and triglyceridemia in both humans and animals. However, the molecular mechanism remains elusive. The present study was conducted to investigate the anti-hyperlipidemic effect of vanadium(IV) complex with 4-chlorodipicolinic acid (VOdipic-Cl)-induced autophagy on hepatic lipid accumulation. To explore the possible underlying mechanisms, primary rat hepatocytes, human hepatoma cell line HepG2, and liver tissue from C57BL/6 mice fed a high-fat diet (HFD) were used...
March 14, 2018: Journal of Inorganic Biochemistry
Erika Salavarría, Sujay Paul, Patricia Gil-Kodaka, Gretty K Villena
To understand the physiological responses of the brown macroalga Macrocystis integrifolia during the marine tidal cycle, two RNA libraries were prepared from algal frond samples collected in the intertidal zone (0 m depth) and subtidal zone (10 m depth). Samples collected from intertidal zone during low tide was considered as abiotic stressed (MI0), while samples collected from subtidal zone was considered as control (MI10). Both RNA libraries were sequenced on Illumina NextSeq 500 which generated approx...
April 2018: 3 Biotech
Igor Gayduchenko, Georgy Fedorov, Maxim Moskotin, Denis Yagodkin, Sergey Seliverstov, Gregory N Gol'tsman, Alexander Kuntsevich, Maxim Rybin, Elena D Obraztsova, Vladimir Leiman, Michael S Shur, Taiichi Otsuji, Victor Ryzhii
We report on the sub-THz (129 - 450 GHz) photoresponse of devices based on single layer graphene and graphene nanoribbons with asymmetric source and drain (vanadium and gold) contacts. Vanadium forms a barrier at the graphene interface while gold forms an Ohmic contact. We find that at low temperatures (77K) the detector responsivity rises with the increasing frequency of the incident sub-THz radiation. We interpret this result as a manifestation of a plasmonic effect in the devices with the relatively long plasmonic wavelengths...
March 19, 2018: Nanotechnology
Ravi Prakash Pal, Veena Mani, Deepika Tripathi, Chander Datt
The aim of the study was to assess the effect of inorganic vanadium (V) supplementation on antioxidant enzymes, immune status, and haemato-biochemical attributes of growing crossbred calves. Twenty-four male Karan Fries calves (Tharparkar × Holstein Friesian) (initial body mass 72.83 ± 2.5 kg; age 3-9 month) were randomly allocated to four groups: the control (received basal diet devoid of supplemental V), the 3 ppm (received basal diet with 3 mg/kg V), the 6 ppm (received basal diet with 6 mg/kg V) and the 9 ppm group (received basal diet with 9 mg/kg V)...
March 17, 2018: Biological Trace Element Research
Lin Zhu, Zhaoping Zhong, Jianming Xue, Yueyang Xu, Chunhua Wang, Lixia Wang
Niobium oxide as the promoter was doped in the V/WTi catalyst for the selective catalytic reduction (SCR) of NO. The results showed that the addition of Nb2 O5 could improve the SCR activity at low temperatures and the 6wt.% additive was an appropriate dosage. The enhanced reaction activity of adsorbed ammonia species and the improved dispersion of vanadium oxide might be the reasons for the elevation of SCR activity at low temperatures. The resistances to SO2 of 3V6Nb/WTi catalyst at different temperatures were investigated...
March 2018: Journal of Environmental Sciences (China)
Wenjiao Ren, Liqiang Xu, Lin Zhu, Xinye Wang, Xiaojian Ma, Debao Wang
Lithium-sulfur (Li-S) battery has attracted increasing attention owning to its high energy density and the abundance of sulfur. However, its commercialization is still restricted owing to the low conductivity of sulfur, large volume expansion and severe polysulfide-shuttle effect. To address these problems, here we reported a simple template-free solvothermal method combined with subsequent calcination method to prepare cobalt-doped VN yolk-shell nanospheres encapsulated in thin layer of nitrogen-doped carbon (Co-VN@C) composite as an ideal sulfur hosts for the first time...
March 16, 2018: ACS Applied Materials & Interfaces
Stefania Squadrone, Paola Brizio, Cecilia Mancini, Maria Cesarina Abete, Alfredo Brusco
Spinocerebellar ataxia type 2 (SCA2) is a neurological disorder characterized by cerebellar dysfunction. The possible association between metals and neurodegenerative diseases is under constant investigation, with particular focus on their involvement in oxidative stress and their potential role as biomarkers of these pathologies. Whole blood samples of SCA2 patients and of healthy individuals were subjected to multi-elemental analysis by inductively coupled plasma-mass spectrometry (ICP-MS). Reduced levels of manganese and copper were found in SCA2 patients, while zinc and vanadium concentrations were significantly higher in patients compared to controls...
May 2018: Journal of Trace Elements in Medicine and Biology
P Fallahi, R Foddis, G Elia, F Ragusa, A Patrizio, G Guglielmi, G Frenzilli, S Benvenga, A Cristaudo, A Antonelli, S M Ferrari
Vanadium is a soft, silvery‑grey metal with a number of different oxidation states. The most common commercial form of vanadium is vanadium pentoxide (V2O5). All vanadium compounds are considered toxic. An increase in skin rashes has been observed in certain vanadium workers, including the development of atopic dermatitis. However, to the best of our knowledge, no prior in vivo or in vitro studies have evaluated the effect of vanadium exposure in human dermal fibroblasts. The present study evaluated the effect of V2O5 on proliferation and chemokine secretion in dermal fibroblasts...
March 9, 2018: Molecular Medicine Reports
Haoliang Liu, Chuang Zhang, Hans Malissa, Matthew Groesbeck, Marzieh Kavand, Ryan McLaughlin, Shirin Jamali, Jingjun Hao, Dali Sun, Royce A Davidson, Leonard Wojcik, Joel S Miller, Christoph Boehme, Z Valy Vardeny
Magnonics concepts utilize spin-wave quanta (magnons) for information transmission, processing and storage. To convert information carried by magnons into an electric signal promises compatibility of magnonic devices with conventional electronic devices, that is, magnon spintronics1 . Magnons in inorganic materials have been studied widely with respect to their generation2,3 , transport4,5 and detection6 . In contrast, resonant spin waves in the room-temperature organic-based ferrimagnet vanadium tetracyanoethylene (V(TCNE)x (x ≈ 2)), were detected only recently7 ...
March 12, 2018: Nature Materials
Iwona Zwolak, Dorota Gołębiowska
With increasing human exposure to vanadium-containing compounds and growing concern over their impact on human health, identification of safe methods for efficient treatment of vanadium poisoning may be of value. In this study, using Chinese hamster ovary (CHO-K1) cells, we show that the toxicity of vanadyl sulphate (VOSO4 ) is mitigated in the presence of sodium pyruvate. The exposure of CHO-K1 cells to 100 μM VOSO4 for 48 h induced significant cytotoxicity (measured with a resazurin assay) and elevation of the contents of malondialdehyde (MDA), a lipid peroxidation product, in the examined cells...
January 1, 2018: Toxicology and Industrial Health
Dmitri V Konarev, Alexey V Kuzmin, Yoshiaki Nakano, Salavat S Khasanov, Akihiro Otsuka, Hideki Yamochi, Hiroshi Kitagawa, Rimma N Lyubovskaya
N-Methylimidazole (MeIm) solvates of vanadium(ii), chromium(ii) and iron(ii) phthalocyanines: [VII (MeIm)2 (Pc2- )]0 ·MeIm (1) and [MII (MeIm)2 (Pc2- )]0 ·2C6 H4 Cl2 (M = V (2), Cr (3), and Fe (4)) have been obtained and studied in a crystalline form. It has been shown that central metal atoms have the +2 oxidation state in 1-4 and dianionic Pc2- macrocycles are formed. Optical spectra of 1-3 (VII , CrII ) are different from that of 4 (FeII ) due to the appearance of intense absorption bands in the NIR range at 1187 nm for 1 and 2 and 1178 nm for 3 and manifestation of multiple bands in the visible range...
March 12, 2018: Dalton Transactions: An International Journal of Inorganic Chemistry
Wei Zhang, Giada Innocenti, Paula Oulego, Vitaly Gitis, Haihong Wu, Bernd Ensing, Fabrizio Cavani, Gadi Rothenberg, N Raveendran Shiju
The direct oxidative dehydrogenation of lactates with molecular oxygen is a "greener" alternative for producing pyruvates. Here we report a one-pot synthesis of mesoporous vanadia-titania (VTN), acting as highly efficient and recyclable catalysts for the conversion of ethyl lactate to ethyl pyruvate. These VTN materials feature high surface areas, large pore volumes, and high densities of isolated vanadium species, which can expose the active sites and facilitate the mass transport. In comparison to homogeneous vanadium complexes and VO x /TiO2 prepared by impregnation, the meso-VTN catalysts showed superior activity, selectivity, and stability in the aerobic oxidation of ethyl lactate to ethyl pyruvate...
March 2, 2018: ACS Catalysis
Deepika Tripathi, Veena Mani, Ravi Prakash Pal
Ultra-trace elements or occasionally beneficial elements (OBE) are the new categories of minerals including vanadium (V). The importance of V is attributed due to its multifaceted biological roles, i.e., glucose and lipid metabolism as an insulin-mimetic, antilipemic and a potent stress alleviating agent in diabetes when vanadium is administered at lower doses. It competes with iron for transferrin (binding site for transportation) and with lactoferrin as it is secreted in milk also. The intracellular enzyme protein tyrosine phosphatase, causing the dephosphorylation at beta subunit of the insulin receptor, is inhibited by vanadium, thus facilitating the uptake of glucose inside the cell but only in the presence of insulin...
March 9, 2018: Biological Trace Element Research
Frithjof C Küpper, Eric P Miller, Stephen J Andrews, Claire Hughes, Lucy J Carpenter, Wolfram Meyer-Klaucke, Chiaki Toyama, Yasuyuki Muramatsu, Martin C Feiters, Carl J Carrano
This study explores key features of bromine and iodine metabolism in the filamentous brown alga and genomics model Ectocarpus siliculosus. Both elements are accumulated in Ectocarpus, albeit at much lower concentration factors (2-3 orders of magnitude for iodine, and < 1 order of magnitude for bromine) than e.g. in the kelp Laminaria digitata. Iodide competitively reduces the accumulation of bromide. Both iodide and bromide are accumulated in the cell wall (apoplast) of Ectocarpus, with minor amounts of bromine also detectable in the cytosol...
March 9, 2018: Journal of Biological Inorganic Chemistry: JBIC
Jinlong Gong, Zhijian Zhao, Tengfang Wu, Chuanye Xiong, Guodong Sun, Rentao Mu, Liang Zeng
Supported vanadium oxides are one of the most promising alternative catalysts for propane dehydrogenation (PDH) and massive efforts have been made to improve its catalytic performance. However, unlike Pt-based catalysts, the nature of the active site and surface structure of supported vanadium catalysts under reductive reaction condition still remain elusive. This paper describes the surface structure and the important role of surface-bound hydroxyls of VOx/Al2O3 catalysts under reaction conditions employing in situ DRIFTS experiments and DFT calculations...
March 8, 2018: Angewandte Chemie
P Fallahi, R Foddis, G Elia, F Ragusa, A Patrizio, S Benvenga, A Cristaudo, A Antonelli, S M Ferrari
Vanadium is a grey metal, existing in different states of oxidation, whose most common form in commercial products is vanadium pentoxide (V2O5). All vanadium compounds have been considered toxic. A carcinogenic role of vanadium on the thyroid has recently been proposed. However no in vivo or in vitro studies have evaluated thyroid disruption in humans and/or animals after exposure to vanadium. In the present study we evaluate the effect of V2O5 on proliferation, and chemokine secretion in normal thyrocytes...
March 8, 2018: Oncology Reports
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"