bluuebunny/crossref_metadata_2025_split huggingface dataset:
Direct Access to MIDA Acylboronates through Mild Oxidation of MIDA Vinylboronates
Authors: Lepage Mathieu L. , Lai Samson , Peressin Nicolas , Hadjerci Romain , Patrick Brian O. , Perrin David M. 
Published: October 2017

AbstractAcylboronate esters/trifluoroborates represent an elusive class of boronates that are of increasing interest for both fundamental study as well as applications at the interface of chemistry and biology. Their preparation has been limited by the use of strongly basic anions, often introduced in multistep reactions. Herein, we demonstrate the facile preparation of acylboronate N‐methyliminodiacetyl (MIDA) esters from alkenyl‐2‐boronate esters through mild dihydroxylation and meta‐periodate cleavage. Given the well‐known functional‐group tolerance of this mild reaction sequence and the availability of alkenyl‐2‐boronates, this method should greatly increase access to acylboronate MIDA esters.
Synthesis of acid dyes containing polyetheramine moieties and their low‐temperature dyeing properties on wool fiber
Authors: Wang Haiying , Wang Guowei , Zheng Chunlin , Zhou Tijian , Sun Jie 
Published: October 2017

ABSTRACTTo realize the low‐temperature dyeing of wool fibers, the use of auxiliaries and wool modification are common methods. Low‐temperature auxiliaries may cause water‐pollution problems, and wool modification is a costly and uncontrollable process. In this study, new acid dyes, named D1–D3, containing polyetheramine groups were synthesized and applied to wool fiber by conventional and low‐temperature exhaust dyeing procedures. The results indicate that the new acid dyes could interact with wool‐fiber‐like auxiliaries and render a high exhaustion rate to the wool fiber at a dyeing temperature of 80 °C. In comparison with Acid Blue 25, the D1–D3 dyes showed an increased dyeing rate, especially under a dyeing temperature of 80 °C. Despite the bigger relative molecular masses of D1–D3, the exhaustion rates of D1–D3 were still higher, and the times of half‐dyeing were shorter than that of Acid Blue 25. The color differences between the wool fabrics dyed with the four dyes at 80 and 98 °C, respectively, were compared. We found that the color differences of D1–D3 between 80 and 98 °C were smaller than that of Acid Blue 25. The interactions between the dyes and wool fiber were analyzed and manifested by the measurement of the ζ potential of the dyes and wool fiber. The leveling and transfer properties of the D1–D3 dyes were also investigated, and the color differences of the wool fabrics dyed with Acid Blue 25, D1, and D2 were very low at all measured pH values and temperatures. The fastnesses of D1–D3 on wool fabric were almost the same as that of Acid Blue 25. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 45793.
A strategy for the preparation of closed‐cell and crosslinked polypropylene foam by supercritical CO2 foaming
Authors: Yang Chenguang , Xing Zhe , Zhao Quan , Wang Mouhua , Wu Guozhong 
Published: October 2017

ABSTRACTWe report the preparation of a closed‐cell polypropylene (PP) foam material by supercritical carbon dioxide foaming with the assistance of γ‐ray radiation crosslinking. Styrene–ethylene–butadiene–styrene (SEBS) copolymer was added to PP to enhance radiation crosslinking and nucleation. Radiation effects on the foaming of the PP/SEBS blend with different ratios were investigated. A significant improvement in the foaming of the crosslinked PP/SEBS blend was achieved as compared to pristine PP. The cell density of the crosslinked PP/SEBS foam greatly increased at a dose of 10 kGy and a high closed‐cell ratio was obtained. The tensile strength of the crosslinked PP/SEBS foams (10 kGy) was improved from 14 to 20.7 MPa compared to pristine PP foam (0 kGy). In addition, the crosslinked PP/SEBS blend exhibited a wider foaming temperature window (10 °C) as compared to the non‐crosslinked ones (4 °C). © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 45809.
Fabrication and characterization of novel nanofibers from cress seed mucilage for food applications
Authors: Fahami Arezoo , Fathi Milad 
Published: October 2017

ABSTRACTCress seed mucilage (CSM) as a new source of biomacromolecule has gained attraction in food science due to its biodegradability and biocompatibility. In this research CSM–poly(vinyl alcohol) (PVA) nanofibers were produced under different conditions by electrospinning technique. Viscosity and electrical conductivity of the produced biopolymers were analyzed. The effect of CSM to PVA volume ratio and applied electrical field were evaluated on nanofiber morphology by scanning electron spectroscopy. The optimum nanofibers showed smooth and uniform surfaces with diameter size range of 95–278 nm. The results of Fourier transform infrared spectroscopy of CSM–PVA nanofiber with volume ratio of 60:40 showed characteristic peaks of CSM and PVA. X‐ray diffractometer data clearly revealed the amorphous structure of the electrospun nanofibers. Thermogravimetric and derivative thermogravimetric analysis indicated that thermal stability of electrospun nanofibers increased in comparison to CSM and PVA. The results of this study indicated that CSM can be applied as a new source of biopolymer for production of nanofibers that could be used for different applications such as delivery systems and packaging film fabrication. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 45811.
Preparation of fluorescent pigment latex and its application on binder‐free printing of cotton fabrics
Authors: Li Min , Zhang Liping , Peng Hongyun , Fu Shaohai 
Published: October 2017

ABSTRACTThe recognized disadvantages of pigment printing are the stiff hand feel owing to the large particle size of the binder and pigments and the crosslinked binder introducing rigidity. In the current study, fluorescent pigment latex (FPL) was prepared via mini‐emulsion polymerization and further applied on cotton fabric printing in the absence of binder. The mini‐emulsions were prepared by dispersing the fluorescein in the monomers methyl methacrylate (MMA) and butyl acrylate (BA) with DNS‐86 as emulsifier, hexadecane as co‐emulsifier, and ammonium persulfate as initiator. The Fourier‐transform infrared‐attenuated total refraction, transmission electron microscopy, differential scanning calorimetry, and thermogravimetric analysis showed that the fluorescein was successfully encapsulated into P(MMA‐co‐BA) and the polymer content was 91.22%. The surface morphology study revealed that compact and smooth film was formed onto the surface of FPL printings, which resulted in better hand feel and rubbing fastness as compared to the conventional printings with a large amount of binder. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 45826.
Atmospheric pressure plasma jet treatment of wheat straw for improved compatibility in epoxy composites
Authors: Huner Umit , Gulec Haci Ali , Damar Huner Irem 
Published: October 2017

ABSTRACTThe aim of this study was to investigate the effects of an atmospheric‐pressure gas plasma jet treatment on the interior and exterior surface characteristics of wheat straw and on the mechanical properties of epoxy composites reinforced with wheat straw. Dry air was used as the process gas in the plasma system. A distance between the nozzle and the substrate surface (DNSS) of 35 mm was determined as the most effective parameter enabling remarkable decreases in the
(surface energy) values of both the interior and exterior surfaces of virgin wheat straw. Increased intensities of the peaks related to carbon‐rich species and 11% to 43% decreases in the oxygen/carbon ratios on the surfaces confirmed the more hydrophobic nature of the plasma‐treated wheat straw. A further increase in the DNSS decreased the effectiveness of the plasma treatment, while a decrease in the DNSS caused an inverse effect on the
value, probably due to the etching effect of the plasma action, which was supported by the atomic force microscopy analysis. The overall results indicated that the increased hydrophobicity and valley‐like occurrences without sharp pits created by the plasma action improved the compatibility of the wheat straw with the epoxy matrix, which contributed to superior mechanical properties of the composites. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 45828.
Electrospinning of flux‐enhanced chitosan–poly(lactic acid) nanofiber mats as a versatile platform for oil–water separation
Authors: Wang Dong , Lu Qifang , Wei Mingzhi , Guo Enyan 
Published: October 2017

ABSTRACTEnvironmentally friendly chitosan (CS)–poly(lactic acid) (PLA) nanofiber mats were designed and constructed by an electrospinning strategy. Studies on the wettability of the CS–PLA nanofiber mats showed that they possessed excellent hydrophobic and oleophilic properties in the pH range 1–12. A layered oil–water mixture was separated by CS–PLA nanofiber mats, and the oil flux of the mats collected by #10 stainless steel wire mesh (sample P‐10) was up to 511.36 L m−2 h−1, which was approximately 25 times higher than that of the mats collected by #0 stainless steel wire meshes (sample P‐N). The superior properties of the CS–PLA nanofiber mats may have been due to their tunable porous structure and fine flexibility. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 45830.
Wiederanbindung des historischen Hafens Bad Karlshafen an die Weser
Authors: Helfers Björn 
Published: October 2017

AbstractBad Karlshafen an der Nordspitze Hessens ist der geplante Traum. Der Gründer Landgraf Carl ließ das sumpfige Gebiet an der Mündung der Diemel in die Weser 1699 trockenlegen, um dort eine Barockstadt vom Reißbrett rund um ein Hafenbecken anzulegen. Das Hafenbecken inmitten der neuen Stadt wiederum sollte – ganz im Denken der Epoche – den Besatzungen der einfahrenden Schiffe ein prachtvoller Hinweis auf den Herrscher sein. Indem er solches mit den modernsten Techniken der Zeit erschaffen ließ, zeigte der Landgraf, dass es ihm sogar gelang, die Natur zu beherrschen und das Landschaftsbild regelrecht zu inszenieren. Die historische Schleuse zur Weser hin versieht ihren Dienst schon lange nicht mehr und die Brücke über die einstige Hafeneinfahrt wurde zum befestigten Straßendamm, der das Becken für Schiffe von der Zufahrt zur Weser abriegelt. Dies soll durch die Wiederanbindung des Hafens Bad Karlshafen an die Weser wieder korrigiert und der Hafen damit wieder zur Weser hin geöffnet werden.Im Februar 2016 sprach sich eine knappe Mehrheit der Bad Karlshafener Bürger (51:49) in einem Bürgerentscheid für die Öffnung des Hafens zur Weser aus. Im Herbst 2016 wurde daraufhin mit den Planungen zur Hafenöffnung begonnen.
Ten‐year immune persistence and safety of the HPV‐16/18 AS04‐adjuvanted vaccine in females vaccinated at 15–55 years of age
Authors: Schwarz Tino F. , Galaj Andrzej , Spaczynski Marek , Wysocki Jacek , Kaufmann Andreas M. , Poncelet Sylviane , Suryakiran Pemmaraju V. , Folschweiller Nicolas , Thomas Florence , Lin Lan , Struyf Frank 
Published: October 2017

AbstractWomen remain at risk of human papillomavirus (HPV) infection for most of their lives. The duration of protection against HPV‐16/18 from prophylactic vaccination remains unknown. We investigated the 10‐year immune response and long‐term safety profile of the HPV‐16/18 AS04‐adjuvanted vaccine (AS04‐HPV‐16/18 vaccine) in females aged between 15 and 55 years at first vaccination. Females who received primary vaccination with three doses of AS04‐HPV‐16/18 vaccine in the primary phase‐III study (NCT00196937) were invited to attend annual evaluations for long‐term immunogenicity and safety. Anti‐HPV‐16/18 antibodies in serum and cervico‐vaginal secretions (CVS) were measured using enzyme‐linked immunosorbent assay (ELISA). Serious adverse events (SAEs) were recorded throughout the follow‐up period. Seropositivity rates for anti‐HPV‐16 remained high (≥96.3%) in all age groups 10 years after first vaccination. It was found that 99.2% of 15–25‐year olds remained seropositive for anti‐HPV‐18 compared to 93.7% and 83.8% of 26–45‐year olds and 45–55‐year olds, respectively. Geometric mean titers (GMT) remained above natural infection levels in all age groups. Anti‐HPV‐16 and anti‐HPV‐18 titers were at least 5.3‐fold and 3.1‐fold higher than titers observed after natural infection, respectively, and were predicted to persist above natural infection levels for ≥30 years in all age groups. At Year 10, anti‐HPV‐16/18 antibody titers in subjects aged 15–25 years remained above plateau levels observed in previous studies. Correlation coefficients for antibody titers in serum and CVS were 0.64 (anti‐HPV‐16) and 0.38 (anti‐HPV‐18). This study concluded that vaccinated females aged 15–55 years elicited sustained immunogenicity with an acceptable safety profile up to 10 years after primary vaccination, suggesting long‐term protection against HPV.
Inhibition of telomerase activity and induction of apoptosis by Rhodospirillum rubrum L‐asparaginase in cancer Jurkat cell line and normal human CD4+ T lymphocytes
Authors: Zhdanov Dmitry D. , Pokrovsky Vadim S. , Pokrovskaya Marina V. , Alexandrova Svetlana S. , Eldarov Mikhail A. , Grishin Dmitry V. , Basharov Marsel M. , Gladilina Yulia A. , Podobed Olga V. , Sokolov Nikolai N. 
Published: October 2017

AbstractRhodospirillum rubrum L‐asparaginase mutant E149R, V150P, F151T (RrA) down‐regulates telomerase activity due to its ability to inhibit the expression of telomerase catalytic subunit hTERT. The aim of this study was to define the effect of short‐term and long‐term RrA exposure on proliferation of cancer Jurkat cell line and normal human CD4+ T lymphocytes. RrA could inhibit telomerase activity in dose‐ and time‐dependent manner in both Jurkat and normal CD4+ T cells. Continuous RrA exposure of these cells resulted in shortening of telomeres followed by cell cycle inhibition, replicative senescence, and development of apoptosis. Complete death of Jurkat cells was observed at the day 25 of RrA exposure while normal CD4+ T cells died at the day 50 due to the initial longer length of telomeres. Removal of RrA from senescent cells led to a reactivation of hTERT expression, restoration telomerase activity, re‐elongation of telomeres after 48 h of cultivation, and survival of cells. These findings demonstrate that proliferation of cancer and normal telomerase‐positive cells can be limited by continuous telomerase inhibition with RrA. Longer telomeres of normal CD4+ T lymphocytes make such cells more sustainable to RrA exposure that could give them an advantage during anti‐telomerase therapy. These results should facilitate further investigations of RrA as a potent anti‐telomerase therapeutic protein.
Limbless movement simulation with a particle‐based system
Authors: Waszak Bartlomiej 
Published: October 2017

AbstractSnakes and other limbless animals continue to attract the close attention of scientists because of their unique locomotion abilities. This paper presents a novel approach to limbless movement simulation. We built our simulation framework using position‐based dynamics. We describe the body configuration of snakes using different types of distance constraints. The limbless movement is based on the formulation of a friction constraint to model the behavior of a snake's scales. In our approach, it is easy to solve collisions between objects and self‐collisions for simulated snakes. Our model includes a dynamic geometrical environment colliding with simulated animals. Detailed patterns are presented for four main types of limbless movement: serpentine, rectilinear, concertina, and sidewinding. Finally, we present the process of computing the final smooth visual mesh from the physical simulation data. This paper concludes with several simulation scenarios showing the high‐quality results of our framework for limbless movement simulation.
Towards Tuneable Retaining Glycosidase‐Inhibiting Peptides by Mimicry of a Plant Flavonol Warhead
Authors: Yoshisada Ryoji , van Gijzel Lieke , Jongkees Seino A. K. 
Published: October 2017

AbstractRetaining glycosidases are an important class of enzymes involved in glycan degradation. To study better the role of specific enzymes in deglycosylation processes, and thereby the importance of particular glycosylation patterns, a set of potent inhibitors, each specific to a particular glycosidase, would be an invaluable toolkit. Towards this goal, we detail here a more in‐depth study of a prototypical macrocyclic peptide inhibitor of the model retaining glycosidase human pancreatic α‐amylase (HPA). Notably, incorporation of l‐DOPA into this peptide affords an inhibitor of HPA with potency that is tenfold higher (Ki=480 pm) than that of the previously found consensus sequence. This represents a first successful step in converting a recently discovered natural‐product‐derived motif, already specific for the catalytic side‐chain arrangement conserved in the active sites of retaining glycosidases, into a tuneable retaining glycosidase inhibition warhead.
Controllable Synthesis of CoS2@N/S‐Codoped Porous Carbon Derived from ZIF‐67 for as a Highly Efficient Catalyst for the Hydrogen Evolution Reaction
Authors: Feng Shi , Li Xingyue , Huo Jia , Li Qiling , Xie Chao , Liu Tingting , Liu Zhigang , Wu Zhenjun , Wang Shuangyin 
Published: October 2017

AbstractA convenient, controllable method to fabricate an electrode is necessary to achieve the practical application of a hydrogen evolution reaction (HER) catalyst. In this work, an electrodeposition–ZIF conversion–sulfuration strategy is developed to produce a CoS2@N/S‐codoped porous carbon (CoS2@NSC/CFP) to drive the HER efficiently. CoS2@NSC/CFP was prepared by the electrodeposition of Co(OH)2 on a carbon fiber paper followed by conversion into ZIF‐67 and subsequent sulfuration with sulfur. The loading of electroactive components can be controlled easily in the range of 0.7–10.0 mg cm−2 by varying electrodeposition time from 5 min to 2 h. The resulting material can be employed directly as a working electrode for the HER and it shows an excellent catalytic activity and stability with an overpotential of 95 mV at 10 mA cm−2 and 158 mV to reach 100 mA cm−2 in an acidic medium. The high efficiency is related intimately to the high dispersion of ultra‐small CoS2 nanoparticles, heteroatom‐codoping, and the 3 D porous network configuration of the carbon fiber paper.
Copper‐Catalyzed C2 and C3 Phosphonation of Benzofuran and Benzothiophene with Trialkyl Phosphites
Authors: Wang Yufeng , Yang Yajie , Jie Kun , Huang Ling , Guo Shengmei , Cai Hu 
Published: October 2017

AbstractA strategy for the selective phosphonation of benzofuran and benzothiophene with trialkyl phosphites was developed. In these reactions, the C−H phosphonation of benzofurans or benzothiophenes at the C2 or C3 position with trialkyl phosphites was successfully achieved without directing groups by using a copper catalyst. Additionally, the C5 phosphonation of furan was successful under the same conditions.
Porous, Naturally Derived Hafnium Phytate for the Highly Chemoselective Transfer Hydrogenation of Aldehydes with Other Reducible Moieties
Authors: Song Jinliang , Xue Zhimin , Xie Chao , Wu Haoran , Liu Shuaishuai , Zhang Lujun , Han Buxing 
Published: October 2017

AbstractBoth the utilization of naturally occurring compounds to prepare functional materials and the selective conversion of aldehydes with other reducible moieties (ORMs) are very attractive topics. Herein, we synthesized a novel porous material, hafnium phytate (Hf‐Phy), by using naturally derived sodium phytate as the building block. Hf‐Phy has plenty of mesopores centered around 11.8 nm. Hf‐Phy showed excellent performance for the transfer hydrogenation of aldehydes with ORMs by using 2‐propanol as the hydrogen source with high selectivities (95–100 %) for alcohols without reducing ORMs. Systematic studies suggested that the oxophilicity of Hf4+ and the basicity and structure of Hf‐Phy contributed significantly to the excellent performance. Additionally, Hf‐Phy could be used over at least five cycles without any decrease in activity or selectivity.
Spin‐State Energetics of Fe Complexes from an Optimally Tuned Range‐Separated Hybrid Functional
Authors: Prokopiou Georgia , Kronik Leeor 
Published: October 2017

AbstractWe assess the performance of the optimally tuned range‐separated hybrid (OT‐RSH) functional approach in predicting the ground‐state electronic configuration and spin‐state energetics of complexes that can potentially exhibit multiple spin configurations. To that end, we investigate eight iron complexes: four spin‐crossover complexes, for which reference data from other approximate density functionals are available, and four smaller complexes, for which reference ab initio data are available. We show that the spin‐state energetics are mostly governed by the percentage of short‐range exact exchange and are only weakly influenced by the choice of the range‐separation parameter. However, the electronic structure, especially the fundamental gap, is much more sensitive to the range‐separation parameter. We further find that correct prediction of the ground state in spin‐crossover compounds requires a reduction in the amount of short‐range exact exchange, likely owing to a larger role of static correlation.
Short‐chain esters enriched biofuel obtained from vegetable oil using molecular distillation
Authors: de Oliveira Vanessa F. , Parente Expedito J. S. , Cavalcante Célio L. , Luna F. Murilo T. 
Published: October 2017

AbstractAviation fuels used in gas‐turbine engine powered aircraft are mainly obtained from the distillation of mineral oil. These jet fuel molecules present carbon chain length of C8 to C16 in the same range of fossil kerosene and have high calorific values and a great cold behaviour. With the increase in consumption of jet fuels, it has become extremely important to develop alternative fuels with adequate properties that could be capable of fulfilling the aviation industry requirements. In this context, aviation alternative fuel originated from sustainable raw materials must meet a set of safety requirements and should exhibit similar physicochemical properties to mineral kerosene. In this study the production of a short‐chain esters enriched biofuel using molecular distillation of FAME obtained from babassu oil was evaluated. Operational conditions were assessed to obtain high mass yields and high ester content in the carbon chain length range of kerosene. A fuel with properties close to those of aviation biofuels was obtained at 140 °C. At this temperature, more than 80 % of the esters in the product composition were within the desired range and there was a mass recovery higher than 88 %. In addition, the short‐chain esters enriched biofuel was blended with fossil kerosene at different concentrations and its properties were analyzed in order to study the effects of the gradual addition of this biofuel stream to commercial aviation kerosene. Density, heating value, freezing temperature, and pour point were evaluated. A mixture up to 6.0 % g/g accomplished the specification limits established by ASTM D1655.