bluuebunny/crossref_metadata_2025_split huggingface dataset:
Efficient Fe/CuFeO2/rGO nanocomposite catalyst for electro‐Fenton degradation of organic pollutant: Preparation, characterization and optimization
Authors: Nazari Pegah , Rahman Setayesh Shahrbanoo 
Published: August 2019

The nanocomposite of zero‐valent iron and delafossite CuFeO2 supported on reduced graphene oxide was synthesized for the first time to evaluate its performance as the heterogeneous catalyst toward electro‐Fenton (EF) removal of catechol. X‐ray diffraction, Fourier transform‐infrared, scanning electron microscopy and Brunauer–Emmett–Teller (BET) were used to characterize the nanocomposite. It was found that the rhombohedral structure of CuFeO2 remained stable during the nanocomposite preparation. The BET surface area of the nanocomposite increased about 102 times in comparison with bare CuFeO2. The influence of the operating parameters was investigated. The optimum operating conditions were pH 3, Fe/CuFeO2/rGO: 1 g/l; catechol: 7.5 × 10−4 mol/l; and I: 150 mA, which led to 99% and 78.4% catechol and chemical oxygen demand removal in 120 min, respectively. The stability of the catalyst by leaching measurements was studied. Only 2% and 3.1% of iron and copper, respectively, was leached in the solution. The obtained results introduced Fe/CuFeO2/rGO as a stable and appropriate catalyst for removal of organic compounds by the EF process. It was inferred from the scavenger utilization that hydroxyl radical plays a major role in catechol elimination and EF reaction followed by the Haber–Weiss mechanism at optimum conditions. The gas chromatography–mass spectrometry analysis was performed to detect the intermediate products, and an acceptable degradation pathway was proposed. The EF degradation of catechol follows a pseudo‐first‐order kinetics model with a rate constant of 3.69 × 10−2 min−1 for the optimum operating conditions. The reusability of Fe/CuFeO2/rGO was investigated for six cycles, and the catalytic efficiency almost remained.
C‐S cross‐coupling reaction using novel and green synthesized CuO nanoparticles assisted by Euphorbia maculata extract
Authors: Alinezhad Heshmatollah , Pakzad Khatereh 
Published: August 2019

In the present study, biosynthesis of CuO nanoparticles using a rapid, eco‐friendly, cost‐effective and efficient method has been reported employing aqueous Euphorbia maculata extract as mild, renewable and non‐toxic reducing and capping agents without adding any surfactants. The biogenic and green method has some benefits compared to conventional physical and chemical methods. It is simple, cheap and environmentally friendly.The biosynthesized CuO NP displayed a color change pattern (from sky blue to black) on preparation and presented its respective broad peak at 365 nm, which was analyzed by UV–Vis spectroscopy. Using the FT‐IR analysis, biomolecules in E. maculata extract which are responsible for bioreduction activity and synthesize of CuO NP, were identified. The XRD, EDX and FESEM results confirmed the successful synthesis of CuO nanoparticles of 18 nm sizes, with spherical and sponge crystal structure.The catalytic activity of biosynthesized CuO NPs was studied in C‐S cross‐coupling reaction. This method has the advantages of high yields, easy work‐up, and simple reusability. The recovered CuO NP can be reused four times without any considerable loss of its catalytic activity.
Natural rubber compositions with the partial/total replacement of carbon black/naphthenic oil by renewable additives: Rice husk ash and cashew nut oil
Authors: Moresco S. , Scarton C. T. , Giovanela M. , Carli L. N. , Bieliński D. M. , Crespo J. S. 
Published: August 2019

ABSTRACTThe aim of this work was to use additives from renewable sources to develop an elastomeric formulation with reduced environmental impact and lower rolling resistance. Twelve compositions containing various proportions of rice husk ash—RHA (20, 40, 60, 80, and 100 phr to replace carbon black [CB]) and a combination of RHA with CB (30CB/10RHA and 20CB/20RHA) using cashew nut oil (3 phr) as a processing aid were prepared and characterized based upon their rheometric and physical–mechanical properties. The combined use of CB and RHA after the silanization process (30CB/10RHAS) increased wet grip by 3.6%, reduced rolling resistance by 17.3%, and improved abrasion resistance by 7.3%. Therefore, the use of these alternative raw materials represents an important contribution for the technological development of rubber compounds, with a combination of durability, safety, economy, and reduction in CO2 emissions. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 48314.
RETRACTED: Effect of surface modified WO3 nanoparticle on the epoxy coatings for the adhesive and anticorrosion properties of mild steel
Authors: Xavier Joseph Raj 
Published: August 2019

ABSTRACTThe effect of introducing WO3 (tungsten oxide) nanoparticle in the epoxy coating was analyzed by electrochemical impedance spectroscopy and scanning electrochemical microscopy (SECM) methods in 3.5% NaCl. The (3‐glycidyloxypropyl)trimethoxysilane was treated with the nanoparticle for the proper dispersion and chemical interaction of nanoparticle with the epoxy resin. The introduction of WO3 nanoparticle in the epoxy coating enhances the charge transfer resistance (Rct) as well as the film resistance (Rf). The observation of iron dissolution and oxygen consumption was done by applying the appropriate SECM tip potential in the WO3‐modified nanocomposite coated steel. The epoxy and epoxy–WO3 nanocomposite‐coated samples were used to study the adhesion and anticorrosion properties. The analysis by SEM/EDX displayed that the enriched W was detected in the nanocomposite coating of steel. The presence of the nano level corrosion product containing W was confirmed by focused ion beam‐transmission electron microscope analysis. The high corrosion protection properties of the epoxy‐based nanocomposite coating was due to the complex nanoscale layer formed and chemical interactions of epoxy resin with surface‐modified nanoparticle in nanocomposites. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2020, 137, 48323.
Novel CNC/silica hybrid as potential reinforcing filler for natural rubber compounds
Authors: Ali Syed Danish , Imiete Iikpoemugh Elo , Orlandi Marco Emilio , Castellani Luca , Hanel Thomas , Zoia Luca 
Published: August 2019

ABSTRACTThis work describes the development of a low‐density, renewable, and high reinforcing filler for natural rubber (NR) compounds. The cellulose nanocrystal (CNC)‐based hybrid filler was synthesized by decorating the surface of CNCs with silica using a simple and efficient coprecipitation method. The properties of the prepared hybrid were investigated by field emission scanning electron microscopy, Fourier transform infrared spectroscopy, X‐ray diffraction, nitrogen physisorption measurements, and Thermogravimetric analysis. Then, the prepared hybrid was incorporated in NR using two different approaches, namely, dry mixing and coprecipitation. The dynamic and tensile mechanical properties of the hybrid/NR compounds were evaluated indicating that: the coprecipitation method was found much more effective for homogeneous dispersion and the CNC/silica hybrid provided quite higher reinforcement to NR than reference silica; however, much lower density of the final compounds was obtained. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2020, 137, 48332.
Temperature scanning stress relaxation behavior of water responsive and mechanically adaptive elastomer nanocomposites
Authors: Banerjee Shib Shankar , Natarajan Tamil S. , Subramani B. Eshwaran , Wießner Sven , Janke Andreas , Heinrich Gert , Das Amit 
Published: August 2019

ABSTRACTThe decrease of stress at constant strain, that is, the stress relaxation process as a function of temperature, is a central mechanical characteristics of elastomer nanocomposites for their potential applications. However, in the conventional stress relaxation test, the relaxation behavior is usually determined as a function of time at constant temperature. The present work reports the temperature scanning stress relaxation (TSSR) characteristics of a new kind of mechanically adaptive elastomer nanocomposite by monitoring the nonisothermal relaxation behavior as a function of temperature. This kind of adaptive elastomer nanocomposite was prepared by introducing calcium sulfate (CaSO4), as the water‐responsive phase into the hydrophilic elastomer matrix. The influence of water‐induced structural changes on TSSR behavior was investigated. Water treatment had a strong effect on the shape of the relaxation spectrum of the nanocomposite. It was revealed that the in situ development of hydrated nano‐rod crystal structures of CaSO4 in the elastomer matrix was responsible for the changes in the mechanical relaxation behavior of the composites. Atomic force microscopy was used to verify this nano‐rod crystal morphology in the elastomer matrix. The mechanism of water‐induced mechanical reinforcement of the composite was explored from dynamic mechanical analysis of the material and correlated with its stress relaxation behavior. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2020, 137, 48344.
Improving ferroelectricity and ferromagnetism of PVDF‐CoFe2O4 thick films: Effect of Ethyl acetate and Temperature
Authors: Wang Libo , Su Yuchang , Zhang Jing , Zhang Hongzhi , Dong Qiaoqiao 
Published: August 2019

ABSTRACTPVDF‐CoFe2O4(CFO) thick membranes were synthesized by solvent casting method. The mixed organic solvents consist of N‐methyl‐2‐pyrrolidone (NMP) and Ethyl acetate (EA), in which the mass ratios of NMP and EA (NMP:EA = 1:0, 1:1, and 1:2) and the temperature of solvent evaporation (range from 50 to 80 °C) has been considered. The phase structure, β‐PVDF phase content, and electrical and magnetic properties of these membranes were investigated to reveal the effect of EA addition and temperature on these properties. Results manifest that all samples showed coexistence of ferroelectric and ferromagnetic properties at room temperature. EA addition makes film more compact, which may be responsible for the differences in ferromagnetic properties. Adding EA and enhancing temperature resulted in phase transition of PVDF from α and γ to β, which contributed to membranes’ ferroelectric performances. In all samples, NMP:EA = 1:2 treated at 80 °C exhibits the maximum β‐phase fraction and polarization (Pmax) of 87.2% and 2.398 μC cm−2, respectively. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2020, 137, 48345.
Quinazoline based 1,3,5‐triazine derivatives as cancer inhibitors by impeding the phosphorylated RET tyrosine kinase pathway: Design, synthesis, docking, and QSAR study
Authors: Pathak Prateek , Naumovich Vladislav , Grishina Maria , Shukla Parjanya Kumar , Verma Amita , Potemkin Vladimir 
Published: August 2019

AbstractThe present research focused on designing a quinazoline skeleton, framed via 1,3,5‐triazine derivatives (QBT) through field mapping and alignment studies. The QBT derivatives were synthesized via time‐ and cost‐effective protocol. The 3D‐QSAR study, computational physicochemical properties, and ADME calculation of the derivatives were performed to establish the affinity towards the biological system. Molecular docking in the adenosine triphosphate binding site of the RET tyrosine kinase domain (PDB ID: 7IVU) was studied to elucidate vital structural residues necessary for bioactivity. The derivatives were evaluated for anticancer potency against TPC‐1 cells (thyroid cancer), MCF‐7 cells (breast cancer), and one normal cell line (human foreskin fibroblasts) via 3‐(4,5‐dimethylthiazol‐2‐y1)‐2,5‐diphenyltetrazolium bromide assay followed by an in ovo CAM assay. The entire series of derivatives (8a–o) showed mild to significant anticancer potency against the selected cancer cell lines.
Design and synthesis of leucine‐linked quinazoline‐4(3H)‐one‐sulphonamide molecules distorting malarial reductase activity in the folate pathway
Authors: Patel Tarosh S. , Bhatt Jaimin D. , Dixit Ritu B. , Chudasama Chaitanya J. , Patel Bhavesh D. , Dixit Bharat C. 
Published: August 2019

AbstractOptimization of a modified Grimmel's method for N‐heterocyclization of a leucine‐linked sulfonamide side‐arm at position 2 leading to 2,3‐disustituted‐4‐quinazolin‐(3H)‐ones was accomplished. Further, 22 hybrid quinazolinone motifs (4a‐v) were synthesized by N‐heterocyclization reaction under microwave irradiation using the ionic liquid [Bmim][BF4]‐H2O as green solvent as well as the catalyst. The in vitro screening of the hybrid entities against the malarial species Plasmodium falciparum yielded five potent molecules 4l, 4n, 4o, 4t, and 4u owning antimalarial activity comparable to those of the reference drugs. In continuation, an in silico study was carried out to obtain a pharmacophoric model and quantitative structure–activity relationship. We also built a 3D‐QSAR model to procure more information that could be applied to design new molecules with more potent Pf‐DHFR inhibitory activity. The designed pharmacophore was recognized to be more potent for the selected molecules, exhibiting five pharmacophoric features. The active scaffolds were further evaluated for enzyme inhibition efficacy against alleged receptor Pf‐DHFR computationally and in vitro, proving their candidature as lead dihydrofolate reductase inhibitors, and the selectivity of the test candidates was ascertained by toxicity study against Vero cells. Good oral bioavailability was also proved by studying pharmacokinetic properties.
Flexible Implementation of the BASIL CURE
Authors: Roberts Rebecca , Hall Bonnie , Daubner Colette , Goodman Anya , Pikaart Michael , Sikora Arthur , Craig Paul 
Published: August 2019

AbstractCourse‐based Undergraduate Research Experiences (CUREs) can be a very effective means to introduce a large number of students to research. CUREs are often an extension of the instructor's research, which may make them difficult to replicate in other settings because of differences in expertise or facilities. The BASIL (Biochemistry Authentic Scientific Inquiry Lab) CURE has evolved over the past 4 years as faculty members with different backgrounds, facilities, and campus cultures have all contributed to a robust curriculum focusing on enzyme function prediction that is suitable for implementation in a wide variety of academic settings. © 2019 International Union of Biochemistry and Molecular Biology, 47(5):498–505, 2019.
Construction of molecularly imprinted nanoparticles by employing ultrasound waves for selective determination of doxepin from human plasma samples: Modeling and optimization
Authors: Bahrani Sonia , Ghaedi Mehrorang , Arabi Maryam 
Published: August 2019

AbstractIn this work, molecularly imprinted nanoparticles (MINPs) were applied as selective adsorbent for ultrasound‐assisted micro‐solid‐phase extraction (UAMSPE) of doxepin (DP) from human plasma samples, which was then cleaned up, pre‐concentrated and subjected to HPLC. The MINPs were synthesized based on a non‐covalent approach by precipitation polymerization utilizing methacrylic acid and styrene as functional monomers, DP as template, ethylene glycol dimethacrylate as cross‐linker and 2,2‐azobisisobutyronitrile (AIBN) as initiator. The obtained MINPs were characterized by Fourier transform‐infrared and field emission scanning electron microscopy. Factors influencing the efficiency of UAMSPE such as sonication time, volume of eluent solvent and amount of sorbent were investigated using a central composite design and the optimal points were identified as 4 min of sonication time, 380 μL of eluent solvent and 30 mg of sorbent. Under optimized conditions, the proposed method has linear responses in the range of 0.2–2000 ng mL–1, with a satisfactory limit of detection of 0.04 ng mL–1 and limit of quantification of 0.11 ng mL–1.
Chemical Composition of Bawei Longzuan Granule and Its Anti‐Arthritic Activity on Collagen‐Induced Arthritis in Rats by Inhibiting Inflammatory Responses
Authors: Li Hai‐Jiao , Zhang Chuan‐Tao , Du Huan , Xu Tong , Li Qi , Wang Ping , Fang Gang , Fan Gang 
Published: August 2019

AbstractBawei Longzuan granule (BLG) is a representative Zhuang medicine preparation. The present work aims to characterize the chemical constituents of BLG and evaluate its anti‐arthritic activity. The major chemical constituents of BLG were tentatively identified by ultra‐performance liquid chromatography‐quadrupole time‐of‐flight mass spectrometry (UPLC‐Q‐TOF/MS), which revealed the presence of some alkaloids (e. g., magnoflorine, sinomenine and nitidine) and flavonoids (e. g., hesperidin, diosmin and sinensetin) that may be partly responsible for the anti‐arthritic effect of BLG. In addition, the collagen‐induced arthritis (CIA) model in rats was induced by intradermal injection of bovine collagen‐II in complete Freund's adjuvant at the base of tail. The CIA rats received oral administration of BLG (1.25, 2.5 and 5 g/kg) for 30 days. Then, various indicators were determined to evaluate its anti‐arthritic activity, including paw swelling, arthritic score, body weight, knee joint pathology, thymus index and spleen index. Additionally, the serum levels of tumor necrosis factor (TNF)‐α, interferon (IFN)‐γ, interleukin (IL)‐1β, IL‐6, IL‐4 and IL‐10 were measured to determine the underlying mechanisms. The results showed that BLG efficiently ameliorated the severity of arthritis in CIA rats by decreasing paw swelling and arthritis score and improving the histological lesions of knee joint. Moreover, the serum levels of several pro‐inflammatory cytokines (i. e., IL‐1β, TNF‐α, IL‐6 and IFN‐γ) were downregulated, whereas two anti‐inflammatory factors (i. e., IL‐4 and IL‐10) were upregulated after BLG administration. These results indicated that BLG possessed promising therapeutic effect on collagen‐induced arthritis by inhibiting inflammatory responses. BLG can be used as a complementary or alternative traditional medicine to treat rheumatoid arthritis.
Biological Evaluation of a New Brassinosteroid: Antiproliferative Effects and Targeting Estrogen Receptor α Pathways
Authors: Scherbakov Alexander M. , Zhabinskii Vladimir N. , Khripach Vladimir A. , Shcherbinin Dmitrii S. , Mekhtiev Arif R. , Shchegolev Yuri Yu. , Savochka Aleh P. , Andreeva Olga E. 
Published: August 2019

AbstractBrassinosteroids (BS), a class of plant‐specific steroid hormones, are considered as new potential anticancer agents for the treatment of tumors of different origin, including hormone‐dependent cancers. Effects of a synthetic brassinosteroid BS4 ((22R,23R,24R)‐22,23‐dihydroxy‐24‐methyl‐B‐homo‐7‐oxa‐5α‐cholest‐2‐en‐6‐one ((3aS,7aR,7bS,9aS,10R,12aS,12bS)‐10‐[(2S,3R,4R,5R)‐3,4‐dihydroxy‐5,6‐dimethylheptan‐2‐yl]‐7a,9a‐dimethyl‐1,3a,4,7,7a,7b,8,9,9a,10,11,12,12a,12b‐tetradecahydro‐3H‐benzo[c]indeno[5,4‐e]oxepin‐3‐one)) on hormone‐dependent breast cancer cells and normal epithelial cells and its impact on the estrogen receptor signaling were evaluated. Cytotoxicity was assessed by MTT‐test; expression of estrogen receptor α and survivin was measured by immunoblotting. Transactivation analysis of luciferase reporter gene was performed for ERα and AP‐1 factors after the brassinosteroid treatment. Dock6 and Autodock Vina were used for molecular docking. BS4 revealed a significant antiproliferative effect towards the hormone‐dependent breast cancer cells and was not active against normal epithelial cells. BS4 action on MCF‐7 breast cancer cells was found to be complex: a decrease in ERα expression as well as in its transcription activity was accompanied by inhibition of ERα‐related signaling pathways (AP‐1 complex and survivin). BS4 binding mode to ERα ligand‐binding domain was analyzed by molecular docking. The obtained results show that antiproliferative and antiestrogenic properties of the brassinosteroid BS4, as well as its ability to inhibit the anti‐apoptotic protein survivin may be of interest for further development of anticancer agents.
A double‐lumen catheter for hemodialysis dislocated into the mediastinum
Authors: Kusumoto Takuya , Mitsushio Kento , Kajiwara Nobuyuki 
Published: August 2019

AbstractThe insertion of a catheter into the mediastinum can occur in any patient as a complication. We must check for blood regurgitation not only in the blood removal line but also in the blood return line.
Fluoroscopic‐assisted laparoscopic retrieval of retained glucose sensor wire from the omentum
Authors: Sang Adam X. , Lal Rayhan , August Auriel , Danzer Enrico , Buckingham Bruce , Mueller Claudia M. 
Published: August 2019

AbstractWe describe a case in which retained wires from a continuous glucose monitor were removed from the abdominal wall and peritoneum of a 6‐year‐old boy. We highlight a concern for continuous glucose monitor use in children and discuss surgical techniques used to retrieve tiny, mobile objects from complex body cavities.
Porous α‐MnSe Microsphere Cathode Material for High‐Performance Aluminum Batteries
Authors: Du Yiqun , Zhao Shimeng , Xu Cheng , Zhang Wenyang , Fan Shuming , Li Pan , Jin Huixin , Zhang Youjian , Zhang Jianxin 
Published: August 2019

AbstractAluminum batteries (ABs) have been considered as a viable candidate for new‐generation energy‐storage devices due to its low cost and high theoretical volumetric capacity. Despite these advantages, the large‐scale application of ABs is constrained by scarce options of suitable cathode materials. Herein, three‐dimensional nanostructured α‐MnSe microspheres with porous properties are reported as a cathode for ABs. The nanosized and porous structure of α‐MnSe could offer numerous open channels and the short ionic transport path, which would efficiently mitigate volume changes and enhance electrochemical reaction kinetics. Moreover, the pseudocapacitive characteristic of Al3+ storage in α‐MnSe contributes to the fast kinetics of the cathode. It is demonstrated that the reversible Al3+ insertion/extraction occurs in the α‐MnSe cathode during the cycling process. The resulting aluminum battery based on the α‐MnSe cathode, AlCl3/[EMIm]Cl ionic liquid electrolyte, and aluminum anode exhibits an ultrahigh reversible capacity of 408 mA h g−1 at 0.2 A g−1. Even for a current density at 1 A g−1, a discharge capacity of 131 mA h g−1 could be retained with a Coulombic efficiency of 97 % over 150 cycles. This strategy has referential significance in aspects of the selection of compatible cathode for ABs.
Base‐Assisted Electrografting of Aromatic Amines
Authors: Anex Corentin , Touzé Ewen , Curet Léonard , Gohier Frédéric , Cougnon Charles 
Published: August 2019

AbstractContrary to aliphatic amines, aromatic amines have received less attention for surface modification by oxidation due to the low acidity of their cation radicals. To overcome this limitation, bases are often added into the solution to facilitate or to make the grafting possible. However, there has only been a modest focus on their impact on the grafting efficiency. Here, the anodic behavior of a series of para‐substituted anilines was investigated in the presence of different bases to address this issue. From complete sets of Brønsted acidity/basicity data and H‐bond acidity/basicity factors for both para‐substituted anilines and bases, a grafting efficiency index was proposed as a practical tool to choose the most suitable base for the grafting. As a proof‐of‐concept for base‐assisted grafting of aromatic amines, two aniline/base systems were tested to modify carbon surfaces at lower potential, compared to the modification achieved from pure aniline solutions.