bluuebunny/crossref_metadata_2025_split huggingface dataset:
Insecticide susceptibilities of the two rice planthoppers Nilaparvata lugens and Sogatella furcifera in East Asia, the Red River Delta, and the Mekong Delta
Authors: Matsumura Masaya , Sanada‐Morimura Sachiyo , Otuka Akira , Sonoda Shoji , Van Thanh Dinh , Van Chien Ho , Van Tuong Phan , Loc Phung Minh , Liu Ze‐Wen , Zhu Zeng‐Rong , Li Jian‐Hong , Wu Gang , Huang Shou‐Horng 
Published: September 2017

AbstractBACKGROUNDThe two rice planthoppers, Nilaparvata lugens and Sogatella furcifera, have different life cycles in the regions of East Asia, the Red River Delta, and the Mekong Delta. The susceptibilities of these species to a range of insecticides have not previously been compared among the three regions over multiple years. Here, we describe the differences and similarities in insecticide susceptibilities of the two species among the three regions in 2006–2011.RESULTSIn all three regions in 2006 − 2011, N. lugens developed high and moderate levels of resistance to imidacloprid and thiamethoxam, respectively, but this species did not develop resistance to fipronil. In contrast, S. furcifera developed a high level of resistance to fipronil. The ranges in 50% lethal dose (LD50) values for N. lugens treated with both imidacloprid and thiamethoxam were similar over time between East Asia and the Red River Delta, and were different in the Mekong Delta.CONCLUSIONThe results support the idea that resistant populations migrate from the Red River Delta region to East Asia. Therefore, continuous monitoring of the susceptibility of N. lugens to insecticides in the Red River Delta is very important for insecticide resistance management in East Asia. © 2017 Society of Chemical Industry
Robust stability analysis of uncertain multiorder fractional systems: Young and Jensen inequalities approach
Authors: Taghavian Hamed , Tavazoei Mohammad Saleh 
Published: September 2017

SummaryRobust stability analysis of multiorder fractional linear time‐invariant systems is studied in this paper. In the present study, first, conservative stability boundaries with respect to the eigenvalues of a dynamic matrix for this kind of systems are found by using Young and Jensen inequalities. Then, considering uncertainty on the dynamic matrix, fractional orders, and fractional derivative coefficients, some sufficient conditions are derived for the stability analysis of uncertain multiorder fractional systems. Numerical examples are presented to confirm the obtained analytical results.
Cyanosilylation of Aldehydes Catalyzed by MIL‐101(Cr): A Theoretical Investigation
Authors: de Oliveira Aline , Mavrandonakis Andreas , de Lima Guilherme F. , De Abreu Heitor A. 
Published: September 2017

AbstractThe Metal‐Organic Frameworks (MOFs) compose a class of solids with promising applicability. There are many different structures and many distinct ways to synthesize new solids based on previously known MOFs. The understanding of these materials at molecular level is very important, because it can assist the design of solids with optimized properties to a desired application. The cyanosilylation of aldehydes is a reaction which can be used to evaluate the catalytic performance of a material as Lewis acid or base. However, it is experimentally difficult to identify the most relevant sites. In this work, DFT calculations were used aiming to get information about the important chemical structural characteristics of the MOF MIL‐101(Cr) which explain its catalytic activity to the cyanosilylation reaction. The investigation shows that when this MOF acts as a Lewis acidic catalyst the cyanosilylation is 1010 times faster than the non‐catalyzed process.
Carbon Nanotube/Graphite Mixtures Used as Cavity Cell Macroelectrodes and their Unexpected Behavior Towards Benzyl Bromide Electroreduction
Authors: Santos de Oliveira Luciana , Navarro Marcelo , Tavares Ribeiro Rogério , Lago Falcão Eduardo Henrique 
Published: September 2017

AbstractPowder macroelectrodes were prepared by mixing carbon nanotubes (CNT) and graphite in different ratios, and evaluated as electron transfer medium for the benzyl bromide electroreduction. 1,2‐Diphenylethane (DPE) (1‐electron process) was favored, instead of toluene (2‐electron process), for all CNT:graphite mass ratios, while pure graphite or CNT favored toluene as major product. The 3:7 CNT:graphite mass ratio gave the best result, furnishing 70 % yield of DPE. Cyclic voltammetry showed a cathodic shift for the benzyl bromide reduction potential by using CNT:graphite electrode composition, favoring the 1‐electron process products during the electrolyses, and corroborating the results observed.
Microwave‐Assisted Synthesis of C‐4′‐(1,5‐disubstituted)‐triazole‐spiro‐α‐L‐arabinofuranosyl Nucleosides
Authors: Rungta Pallavi , Mangla Priyanka , Maikhuri Vipin K. , Singh Sunil K. , Prasad Ashok K. 
Published: September 2017

AbstractThe synthesis of C‐4′‐(1,5‐disubstituted)‐triazole‐spiro‐α‐L‐arabinofuranosyl nucleosides has been achieved in a regio‐ and stereospecific manner by using intramolecular Huisgen 1,3‐dipolar cycloaddition reaction. The synthesis of these nucleosides necessitates the possession of azide and alkyne moieties in the same molecule, which is being employed as the precursor. Thus, the crucial step in the synthesis of targeted compound is the preparation of 1,2,3‐tri‐O‐acetyl‐5‐azido‐5‐deoxy‐4‐C‐propynyl‐α,β‐L‐arabinofuranose and its conversion to corresponding nucleosides via nucleobase coupling. The microwave heating of such tailor made nucleoside precursors furnishes the targeted spironucleosides, which combines conformational‐restriction concept with a triazole structural feature highly sought in drug design.
Magnetic Properties of Bilayer Thin Film Composed of Hard and Soft Ferromagnetic Prussian Blue Analogues
Authors: Fitta Magdalena , Czaja Paweł , Krupiński Michał , Lewińska Gabriela , Szuwarzyński Michał , Bałanda Maria 
Published: September 2017

AbstractThe molecule‐ based bilayer system composed of hard Ni3.38[Fe(CN)6]2⋅nH2O and soft Ni3.1[Cr(CN)6]2⋅nH2O ferromagnetic Prussian blue analogues has been fabricated on a solid substrate by “layer by layer” deposition. The structure and morphology characterization as well as results of magnetic measurements are described. The thickness of the bilayer is ca. 140 nm including a 35 nm interface. This bilayer system shows anisotropic magnetic properties reflected in the shape of magnetic hysteresis measured in various film orientation with respect to the direction of external magnetic field. There is no exchange interaction between hard and soft magnetic layer and irrespective of bilayer orientation, the magnetization and demagnetization process of both Ni3.38[Fe(CN)6]2⋅nH2O and Ni3.1[Cr(CN)6]2⋅nH2O layers occurs independently.
Development of a Dual‐Fluorescence Emission Sensor Based on Photo‐Induced Electron Transfer and Aggregation‐Induced Emission Enhancement for Detection of Water
Authors: Ooyama Yousuke , Nomura Ryosuke , Enoki Toshiaki , Sagisaka Rizumu , Tsunoji Nao , Ohshita Joji 
Published: September 2017

AbstractWe have designed and developed a tetraphenylethen (TPE)‐anthracene‐(aminomethyl)phenylboronic acid ester (AminoMePhenylBPin) structure RN‐1 possessing PET (photo‐induced electron transfer) and AIEE (aggregation‐induced emission enhancement) characteristics as a fluorescent sensor for detection of water in organic solvents. It was found that the appearance of fluorescence band in the low water content region is attributed to the fluorescence emission originating from the anthracene skeleton due to the formation of PET inactive species RN‐1(H2O) by the addition of water molecules. Moreover, the appearance of broad fluorescence band in the high water content region is attributed to the AIEE characteristic due to restricted intramolecular rotation (RIR) of TPE unit associated with the aggregate formation (RN‐1(H2O)‐A). This work proposes that the PET/AIEE hybrid fluorescence sensor can act as a dual‐fluorescence emission sensor for detection of water in low water content region and high water content region in solvents.
Synthesis, Crystal Structure and Magnetic Properties of [Mn((1R, 2R)‐Salcy)N3/NCS] Complexes: Solvent Dependent Crystallization of Monomers, Chains and Dimers.
Authors: Bhargavi Govindugari , Rajasekharan Melath V. , Costes Jean‐Pierre 
Published: September 2017

AbstractFive new chiral MnIII complexes [Mn((1R, 2R)‐Salcy)N3]∞⋅CH3CN (1), [Mn((R,R)‐Salcy)N3]∞ (2), [Mn((R,R)‐Salcy)N3] (4), [Mn((R,R)‐Salcy)(H2O)N3]⋅C4H8O (5) and [Mn((R,R)‐Salcy)NCS] (6) have been synthesized and characterized by X‐ray structural analysis and magnetic measurements (Salcy=N,N′‐bis(salicylidene)‐1,2‐diaminocyclohexane}. The four azido complexes have been obtained from the previously known [Mn((R,R)‐Salcy)(CH3OH)N3] (3) by crystallization from various solvents. Compounds 1 and 2 are trans‐μ‐1,3‐azide bridged coordination polymers. While 1 forms helical chains, the chain in 2 is formed via translation of a dimeric helicate repeat unit. Compound 3 is a methanol coordinated mononuclear azido complex which forms a 2D‐network through H‐bonding. Compounds 4 and 6 are phenoxo‐bridged dimers without inversion center. Compound 5 is an aqua coordinated mononuclear azido complex, which forms a 1D‐chain through O−H⋅⋅⋅N hydrogen bonding involving axial ligands. In all six compounds MnIII exhibits a characteristic Jahn−Teller elongation. The magnetic coupling in 1 and 2 leads to antiferromagnetic interaction along the chain (2 J=−11.6 cm−1 for 1 and –11.9 cm−1 for 2) through the μ‐1,3‐azide bridge. Compound 3 is weakly antiferromagnetic due to hydrogen bonding interactions in the lattice. The phenoxo dimers (4 and 6) do not have measurable exchange interaction, the low temperature susceptibility being influenced mainly by zero‐field splitting.
Solvent‐Sensitive Sign Inversion of Excimer Origin Circularly Polarized Luminescence in Bipyrenyl Peptides
Authors: Mimura Yuki , Kitamura Sayaka , Shizuma Motohiro , Kitamatsu Mizuki , Fujiki Michiya , Imai Yoshitane 
Published: September 2017

AbstractThe photoexcited and ground state chiralities of enantiopure oligopeptides bearing two pyrenyl groups (DD‐2/LL‐2: four methylene spacer between two pyrenyl groups and DD‐1/LL‐1: no methylene spacer thereof) in eight common organic solvents (CHCl3, CH2Cl2, MeOH, CH3CN, DMF, NMP, DMAc, and acetone) were investigated by means of circularly polarized luminescence (CPL) and circular dichroism (CD) spectroscopies. It was found that chiroptical signs of pyrene‐origin CPL and CD signals largely depend on the nature of solvents and are susceptible to the methylene spacer. Actually, the excimer‐origin CPL signs at 450–510 nm of DD‐1/LL‐1 in DMF were (–)/(+), respectively, while those in other solvents were oppositely (+)/(–), respectively. On the other hand, in DD‐2/LL‐2, the excimer‐origin CPL signs were (–)/(+) in CH2Cl2 (and CHCl3), respectively, and (+)/(–) in MeOH/DMF/NMP/DMAc, respectively. The solvent dependent and the methylene spacer dependent CD sign inversion of DD‐1/LL‐1 and DD‐2/LL‐2 were also found. These results led to conclude that the solvent molecule and the methylene spacer collaboratively affect both the ground state chirality and the photoexcited chirality.
Effects of Additives on the Preparation of Ag Nanoparticles Using the Microwave‐Induced Plasma in Liquid Process
Authors: Nishimoto Masamu , Tsukamoto Hiroki , Nguyen Mai Thanh , Yonezawa Tetsu 
Published: September 2017

AbstractThe effect of additives, i. e., H2O2 and pH adjustors, on the preparation of Ag nanoparticles (NPs) fabricated using the microwave‐induced plasma in liquid process (MWPLP) has been investigated. When both aqueous ammonia and NaOH were used as pH adjustors, the rate of the reduction of silver ions decreased with lower concentrations of H2O2 or at higher pH values. Under these conditions, the aggregation of generated nuclei during the early stages of the reduction was suppressed, and the sizes of the obtained Ag NPs decreased. The amount of H2O2 and the pH of the reduction solutions are therefore highly important parameters for the preparation of well‐dispersed Ag NPs using the MWPLP.
Investigation of Active Center of Cu‐Based Catalyst for Low Temperature Methanol Synthesis from Syngas in Liquid Phase: The Contribution of Cu+ and Cu0
Authors: Liu Huan , Chen Tong , Yang Guang , Wang Gong‐Ying 
Published: September 2017

AbstractLaCuMn catalyst was prepared under different reduction temperature and passivation time, and used to catalyze CO hydrogenation to methanol in liquid phase. The effect of reductive copper species on the catalytic activity and the product distribution was studied. The results showed that the surface content of reductive copper species greatly affect the catalytic activity and the approximate molar ratio of Cu+ to Cu0 was important. The mixture of CuZn/AC‐N2 with only Cu+ and CuZn/AC‐H2 with only Cu0 was utilized for the low temperature methanol synthesis from syngas in liquid phase. It was confirmed that both of the reductive copper species of Cu+ and Cu0 were active species and Cu+ was superior to Cu0. Moreover, the synergic function of Cu+ and Cu0 led to the enhancement of the catalytic activity of Cu based catalyst, and the optimum molar ratio of surface Cu+ to Cu0 was in the range of 3.5 to 4.0.
Transparent PVDF‐TrFE/Graphene Oxide Ultrathin Films with Enhanced Energy Harvesting Performance
Authors: Wang Yunqiu , Fang Minjie , Tian Bobo , Xiang Pinghua , Zhong Ni , Lin Hechun , Luo Chunhua , Peng Hui , Duan Chun‐Gang 
Published: September 2017

AbstractPoly(vinylidene fluoride/trifluoroethylene) (PVDF‐TrFE) as a representative organic piezoelectric material have recently attracted wide attention. However, low dielectric permittivity limits its applications. We successfully prepared transparent PVDF‐TrFE/graphene oxide (GO) ultrathin films. The addition of GO greatly improved the dielectric properties of PVDF‐TrFE. The dielectric constant of the composite film is almost three times of that of the PVDF‐TrFE film with the addition of 0.1 wt. % of GO nanosheets. Furthermore, the composite film also exhibits enhanced energy harvesting performance. The electric generator based on the PVDF‐TrFE/ GO ultrathin film shows an output voltages of 49 mV under a pressure of 3.06 KPa. The advantages of transparence, flexibility and better energy harvesting performance make PVDF‐TrFE/GO composite films much more attractive in promising applications of nano/micro electronic devices.
Tunable and Switchable Solid State Fluorescence: Alkyl Chain Length‐Dependent Molecular Conformation and Self‐Reversible Thermochromism
Authors: Hariharan Palamarneri Sivaraman , Gayathri Parthasarathy , Moon Dohyun , Anthony Savarimuthu Philip 
Published: September 2017

AbstractFlexible alkyl chain has been used to control the molecular conformation, packing and intermolecular interactions of aggregation enhanced emissive (AEE) triphenylamine fluorophore, and tune the fluorescence maxima and mechano/thermochromism. 2‐(4‐(diphenylamino)‐2‐ethoxybenzylidene)malononitrile (DPABM‐2), 2‐(4‐(diphenylamino)‐2‐propoxybenzylidene)malononitrile (DPABM‐3), 2‐(4‐(diphenylamino)‐2‐butoxybenzylidene)malononitrile (DPA‐BM‐4), 2‐(4‐(diphenylamino)‐2‐pentyloxybenzylidene) malono‐nitrile (DPABM‐5), 2‐(4‐(diphenylamino)‐2‐hexyloxybenzylidene) malonon‐itrile (DPABM‐6) and 2‐(4‐(diphenylamino)‐2‐heptyloxybenzylidene) malononitrile (DPABM‐7) exhibited weak to strong solid state fluorescence (absolute quantum yield (Φf)=4 to 26%). DPABM‐2 did not show significant fluorescence changes to external stimuli, however, DPABM‐3 and DPABM‐4 exhibited off‐on fluorescence switching. DPABM‐3 also showed tunable fluorescence via polymorphism. Interestingly, DPABM‐5‐7 showed alkyl chain orientation dependent self‐reversible thermochromism. DPABM‐5 and DPABM‐7 exhibited decrease of fluorescence intensity with temperature whereas DPABM‐6 showed increase of fluorescence intensity. Solid state structural analysis revealed the influence of alkyl chain length on the molecular conformations and packing. Powder X‐ray diffraction (PXRD) studies indicate that phase change of materials from crystalline to amorphous and vice‐versa was responsible for fluorescence switching with external stimuli. Further, AEE of DPABM derivatives and the reactive ethylene‐malononitrile has also been exploited for fabricating hydrazine sensing polymer composite film. Thus simple change of alkyl chain lengths lead to the generation of polymorphism, mechanochromism and temperature dependent self‐reversible fluorescence switching materials.
Selective CO2 Adsorption By Methyl‐Functionalized Metal‐Organic Framework
Authors: Ma Deyun , Li Zhi , Jiang Fei , Ma Yanhua , Lin Wanchun , Wen Meiling , Liu Bei , Xu Jun 
Published: September 2017

AbstractA hydrophobic porous MOF functionalized by methyl groups with a chemical formula {[Cd2(oba)2(dmbpy)(H2O)]⋅2(EtOH)⋅4(H2O)}n (1) (oba=4,4′‐oxydibenzoate, dmbpy=3,3′‐dimethyl‐4,4′‐bipyridine, EtOH=ethanol) was synthesized and structurally characterized. 1 exhibits a 3D framework with a 1D channel parallel to the c axis. TGA, PXRD, and water vapor sorption results show high thermal and water stability for the framework. More importantly, 1 shows a very high adsorption selectivity to CO2 as compared to other small gas molecules (e. g. CH4, N2, O2, CO and H2) at 298 K based on the results of simulations and experiments.
Genetic Evolution of Glioblastoma Stem-Like Cells From Primary to Recurrent Tumor
Authors: Orzan Francesca , De Bacco Francesca , Crisafulli Giovanni , Pellegatta Serena , Mussolin Benedetta , Siravegna Giulia , D’Ambrosio Antonio , Comoglio Paolo M. , Finocchiaro Gaetano , Boccaccio Carla 
Published: September 2017

Abstract
Glioblastoma (GBM) is a lethal tumor that displays remarkable genetic heterogeneity. It is also known that GBM contains a cell hierarchy driven by GBM stem-like cells (GSCs), responsible for tumor generation, therapeutic resistance, and relapse. An important and still open issue is whether phylogenetically related GSCs can be found in matched primary and recurrent GBMs, and reflect tumor genetic evolution under therapeutic pressure. To address this, we analyzed the mutational profile of GSCs isolated from either human primary GBMs (primary GSCs) or their matched tumors recurring after surgery and chemoradiotherapy (recurrent GSCs). We found that recurrent GSCs can accumulate temozolomide-related mutations over primary GSCs, following both linear and branched patterns. In the latter case, primary and recurrent GSCs share a common set of lesions, but also harbor distinctive mutations indicating that primary and recurrent GSCs derive from a putative common ancestor GSC by divergent genetic evolution. Interestingly, TP53 mutations distinctive of recurrent GSCs were detectable at low frequency in the corresponding primary tumors and likely marked pre-existent subclones that evolved under therapeutic pressure and expanded in the relapsing tumor. Consistently, recurrent GSCs displayed in vitro greater therapeutic resistance than primary GSCs. Overall, these data indicate that (a) phylogenetically related GSCs are found in matched primary and recurrent GBMs and (b) recurrent GSCs likely pre-exist in the untreated primary tumor and are both mutagenized and positively selected by chemoradiotherapy.
Two decades of dendrimers as versatile MRI agents: a tale with and without metals
Authors: McMahon Michael T. , Bulte Jeff W. M. 
Published: September 2017

Dendrimers or dendritic polymers are a class of compounds with great potential for nanomedical use. Some of their properties, including their rigidity, low polydispersity and the ease with which their surfaces can be modified make them particularly well suited for use as MRI diagnostic or theranostic agents. For the past 20 years, researchers have recognized this potential and refined dendrimer formulations to optimize these nanocarriers for a host of MRI applications, including blood pool imaging agents, lymph node imaging agents, tumor‐targeted theranostic agents and cell tracking agents. This review summarizes the various types of dendrimers according to the type of MR contrast they can provide. This includes the metallic T1, T2 and paraCEST imaging agents, and the non‐metallic diaCEST and fluorinated (19F) heteronuclear imaging agents.This article is categorized under:

Diagnostic Tools > In Vivo Nanodiagnostics and Imaging
Implantable Materials and Surgical Technologies > Nanomaterials and Implants
Microbial healing of cracks in concrete: a review
Authors: Joshi Sumit , Goyal Shweta , Mukherjee Abhijit , Reddy M Sudhakara 
Published: September 2017

Abstract
Concrete is the most widely used construction material of the world and maintaining concrete structures from premature deterioration is proving to be a great challenge. Early age formation of micro-cracking in concrete structure severely affects the serviceability leading to high cost of maintenance. Apart from conventional methods of repairing cracks with sealants or treating the concrete with adhesive chemicals to prevent the cracks from widening, a microbial crack-healing approach has shown promising results. The unique feature of the microbial system is that it enables self-healing of concrete. The effectiveness of microbially induced calcium carbonate precipitation (MICCP) in improving durability of cementitious building materials, restoration of stone monuments and soil bioclogging is discussed. Main emphasis has been laid on the potential of bacteria-based crack repair in concrete structure and the applications of different bacterial treatments to self-healing cracks. Furthermore, recommendations to employ the MICCP technology at commercial scale and reduction in the cost of application are provided in this review.
Ocular Dysfunctions Presenting in Tacrolimus‐Induced Posterior Reversible Encephalopathy Syndrome: A Case Presentation
Authors: Brown Cora H. , Feng Alexander J. , Cruz Ernesto 
Published: September 2017

AbstractThe constellation of ocular symptoms known as Balint syndrome is a rare disorder seen in bilateral parieto‐occipital lesions and is most frequently due to arterial occlusive disease or acute hypertension. Here we present the case of a patient with tacrolimus‐induced posterior reversible encephalopathy syndrome (PRES) who presented with optic ataxia, simultanagnosia, and ocular apraxia. These ocular findings, consistent with Balint syndrome, are rarely the initial presentation of PRES. This case highlights the importance of early recognition of this unusual phenomenon, as well as the importance of an individualized rehabilitation plan to maximize functional independence in these patients.Level of EvidenceV
Nonsurgical Treatment of Delayed‐Onset Brachial Plexopathy Due to Hypertrophic Clavicular Callus: A Case Report
Authors: Carpenter Benjamin M. , Pettersson David R. , Mirarchi Adam J. , Groshong Drew , Carlson Hans L. 
Published: September 2017

AbstractClavicular fractures are common injuries that traditionally are managed nonsurgically without clinically significant sequelae. However, they may develop hypertrophic callus formation that compresses the brachial plexus. These cases may present months to years after initial injury with varying degrees of pain, paresthesia, and weakness on the affected side and usually are treated by surgical resection of the hypertrophic callus. We present a case of brachial plexopathy due to hypertrophic clavicular callus causing weakness and paresthesia. The plexopathy was confirmed with imaging and electrodiagnostic studies. This case was unusual in that resolution of symptoms was achieved nonsurgically.Level of EvidenceV