bluuebunny/crossref_metadata_2025 huggingface dataset:
Exploring the Feelings and Thoughts that Accompany the Experience of Consumption Desires
Authors: Boujbel Lilia , d'Astous Alain
Published: January 2015

Desires represent a central aspect of human motivation. Recent studies in the field of consumer behavior have shown the importance of the concept of desire to better understand the aspirations of consumers living in economically developed countries for whom most basic needs are satisfied. There has been however no previous attempt at circumscribing the feelings and thoughts that accompany the experience of desire. The present research addresses this gap in the literature. The objectives of the research presented in this article are threefold: (1) to identify the affective and cognitive responses that accompany the experience of consumption desire, (2) to develop a valid scale to assess these feelings and cognitions, and (3) to explore the theoretical links that these internal responses have with other concepts of interest in the field of consumer behavior, such as impulsive and compulsive buying, materialism, innovativeness, voluntary simplicity, self‐esteem, and life satisfaction. In order to address these objectives, five studies were conducted. The results of these studies have revealed that the experience of consumption desires is generally accompanied by psychological events that are affective (i.e., pleasure, discomfort, and guilt) and cognitive (i.e., control). This research contributes to a better understanding of the phenomena that surround the experience of consumption desires as lived and managed by consumers through the development of a reliable and valid measuring instrument that can be used to explore the relationships between these phenomena and other fundamental consumer behavior concepts.
Hierarchical abstraction of weakly coupled synchronized oscillator networks
Authors: Roychowdhury Jaijeet , Bhushan Palak
Published: January 2015

We provide a constructive and numerically implementable proof that synchronized groups of coupled, self‐sustaining oscillators can be represented as a single effective Perturbation Projection Vector (PPV) (or Phase Response Curve) phase macromodel – in other words, that a group of synchronized oscillators behaves as a single effective oscillator with respect to external influences. This result constitutes a foundation for understanding and predicting synchronization/timing hierarchically in large, complex systems that arise in nature and engineering. We apply this result hierarchically to networks of synchronized oscillators, thereby enabling their efficient and scalable analysis. We illustrate our theory and numerical methods with examples from electronics (networks of three‐stage ring oscillators), biology (Fitzhugh–Nagumo neurons) and mechanics (pendulum clocks). Our experiments demonstrate that effective PPVs extracted hierarchically can capture emergent phenomena, such as pattern formation, in coupled oscillator networks. Copyright © 2015 John Wiley & Sons, Ltd.
Polarization‐resolved electroluminescence study of InGaN/GaN dot‐in‐a‐wire light‐emitting diodes grown by molecular beam epitaxy
Authors: Li K. H. , Wang Q. , Nguyen H. P. T. , Zhao S. , Mi Z.
Published: January 2015

The polarization properties of light emission from InGaN nanowire (NW) light‐emitting diodes (LEDs) have been studied with the use of goniometric setup. A maximum polarization ratio of ∼0.7 has been obtained from the edge emission of NW array‐based LEDs and the light is mainly polarized parallel to the c‐axis of NWs. The nearly isotropic polarization response from a core–shell NW LED structure is also observed, and it is found that the degree of polarization is strongly depended on the NW diameter. With the growth of the AlGaN shell, the resulting diameter of core–shell NWs becomes larger and is comparable to the emission wavelength, thus weakening the optical confinement effect and the polarization behavior. The size‐dependent polarization properties of NW structures are further verified by the finite‐difference time‐domain simulation. NWs with diameters much less than the emission wavelength render a strong contrast between the p‐ and s‐polarized light emissions.

(Left) FE‐SEM image of MBE‐grown NWs covered with polyimide. (Right) Plot of integrated electroluminescence intensity as a function of polarizer angle for a NW LED.
Distance‐weighted discrimination
Authors: Marron J. S.
Published: January 2015

Distance‐weighted discrimination is a classification (discrimination) method. Like the popular support vector machine, it is rooted in optimization; however, the underlying optimization problem is modified to give better generalizability, particularly in high dimensions. The two key ideas are that distance‐weighted discrimination directly targets the data piling problem and also correctly handles unknown, unbalanced subclasses in the data. A useful property of distance‐weighted discrimination, beyond just good classification performance, is that it provides a direction vector in high‐dimensional data space with several purposes, including indication of driving phenomena behind class differences, data visualization, and batch adjustment tasks. WIREs Comput Stat 2015, 7:109–114. doi: 10.1002/wics.1345

This article is categorized under:

Statistical Learning and Exploratory Methods of the Data Sciences > Clustering and Classification

Applications of Computational Statistics > Genomics/Proteomics/Genetics

Statistical and Graphical Methods of Data Analysis > Statistical Graphics and Visualization
Hydrothermal Assembly of Two New 3D Zinc(II) pcu Nets: Coordination Chemistry, Crystal Structures, and Fluorescence Properties
Authors: Zhu Xiaofei , Yang Yu , Jiang Ning , Li Bo , Zhou Defeng , Fu Hai , Wang Ning
Published: January 2015

Self‐assembly of zinc(II) coordination polymers have attracted intense interests due to their intriguing frameworks and fluorescence properties. Two new 3D ZnII coordination polymers with pcu networks, formulated by [Zn2L1L2(mbtz)]·H2O (1) and [Zn4L12L22(btp)2]·7H2O (2) [H2L1 = 2,5‐dibenzoylterephthalic acid, H2L2 = 4,6‐dibenzoylisophthalic acid, mbtz = 1,3‐bis(1,2,4‐triazol‐1‐ylmethyl)benzene, and btp = 1,3‐bis(1,2,4‐triazol‐1‐yl)propane], were synthesized under normal hydrothermal conditions. Single‐crystal X‐ray diffraction analyses revealed that both of the two compounds exhibited interesting 3D pcu frameworks, and showed shifted fluorescent emissions arising from the coordination chemistry between ZnII and the N‐donor ligands.
The Use of Boron Compounds for Stabilization of Lipase from Pseudomonas aeruginosa ES3 for the Detergent Industry
Authors: Sarac Nurdan , Ugur Aysel , Boran Rukiye , Elgin Emine Sonay
Published: January 2015

This study aimed to characterize a lipase that is highly active and stable under typical washing conditions for use as a detergent ingredient by investigating the effects of various boron compounds on lipase stabilization under different conditions. In addition, the antimicrobial activity of the boron compounds used in enzyme stabilization was examined in order to obtain an effective antimicrobial detergent. A lipase‐producing bacterium was isolated from kitchen wastewater samples using Rhodamine‐B Agar medium and identified as Pseudomonas aeruginosa based on 16S rDNA sequence analysis. The ES3 lipase obtained from P. aeruginosa was purified, and the purified enzyme was found to have a molecular mass of 40 kDa. The enzyme showed optimal activity at pH 9.0–10.0 and 40 °C and remained stable in the presence of various metal ions, surfactants and oxidizing agents. Moreover, the pH stability and thermostability of the enzyme was improved by the addition of boron compounds, which, when used as stabilizers in the incubation media, also increased the stability of the enzyme towards commercial detergents. Furthermore, the enzyme displayed properties comparable with the commercial product Lipolase®, which has shown excellent stability towards various commercial detergents. Finally, boron compounds used to stabilize the lipase were found to possess antimicrobial properties, suggesting that detergents incorporating these compounds will also exhibit antimicrobial activity when washing clothes and dishes.
Corrosion Inhibition and Adsorption Behavior of Sodium Lauryl Ether Sulfate on L80 Carbon Steel in Acetic Acid Solution and Its Synergism with Ethanol
Authors: Deyab Mohamed Abdel Moneim
Published: January 2015

The application of sodium lauryl ether sulfate (SLES) as an anionic surfactant and its synergistic combination with ethanol for inhibition of corrosion of L80 carbon steel in acetic acid solutions were investigated by means of potentiodynamic polarization measurements, scanning electron microscopy (SEM), X‐ray diffraction (XRD), and energy‐dispersive X‐ray (EDX) investigations. The inhibition efficiency increases with an increase in concentration of SLES. The adsorption of SLES on the surface of L80 carbon steel obeys the Freundlich isotherm. SLES acts predominately as an anodic inhibitor. XRD, EDX, and SEM examinations of the electrode surface confirmed the adsorption of SLES on the electrode surface. The addition of ethanol with SLES significantly enhances the inhibition effectiveness and generates a strong synergistic effect.
Effect of Positional Distribution of Linoleic Acid on Oxidative Stability of Triacylglycerol Molecules Determined by 1H NMR
Authors: Wang Xiang‐Yu , Yang Dan , Gan Lu‐Jing , Zhang Hua , Shin Jung‐Ah , Lee Yong‐Hwa , Jang Young‐Seok , Lee Ki‐Teak
Published: January 2015

1H nuclear magnetic resonance (1H NMR) was used to determine the effect of positional distribution of linoleic acid (L) on the oxidative stability of triacylglycerols. For this purpose, structured soybean oil (SSO), which had a similar total fatty acid composition but a different L positional distribution than soybean oil (SO), was produced by interesterification reaction. The SO and SSO were oxidized in the dark at 40 °C. Afterwards, 1H NMR was used to monitor the oxidation process and quantify the main polyunsaturated fatty acid, Z,E‐ and E,E‐conjugated forms, hydroperoxides, and aldehydes at different oxidation periods in a single run. After 45 days of oxidation, SSO showed lower L content than SO (9.9 ± 1.1 and 16.8 ± 0.5 %, respectively). Additionally, secondary oxidation products in SSO were shown to be more abundant than in SO (82.3 ± 4.9 and 43.6 ± 0.9 mmol/L oil, respectively). This study indicated that SO, which contains a higher distribution of L at the sn‐2 position, was more resistant to autoxidation than SSO.
On the inviscid limit of the 2D Navier–Stokes equations with vorticity belonging to BMO-type spaces
Authors: Bernicot Frédéric , Elgindi Tarek , Keraani Sahbi
Published: January 2015

In a recent paper [6], the global well-posedness of the two-dimensional Euler equation with vorticity in

L^{1} \cap \mathrm{LBMO}

was proved, where LBMO is a Banach space which is strictly imbricated between

L^{\infty }

and BMO. In the present paper we prove a global result on the inviscid limit of the Navier–Stokes system with data in this space and other spaces with the same BMO flavor. Some results of local uniform estimates on solutions of the Navier–Stokes equations, independent of the viscosity, are also obtained.
FAM19A3, a novel secreted protein, modulates the microglia/macrophage polarization dynamics and ameliorates cerebral ischemia
Authors: Shao Yankun , Deng Ting , Zhang Tong , Li Peilan , Wang Yuehui
Published: January 2015

In this study, we have identified FAM19A3 as a gene that is significantly upregulated in the microglia in the middle cerebral artery occlusion (MCAO) mouse model. FAM19A3 expression and secretion were promoted by M2 stimuli, and this indicated that FAM19A3 might be an M2‐type gene. Indeed, recombinant FAM19A3 promoted M2 polarization and inhibited M1 polarization of microglia in vitro. Similarly, recombinant FAM19A3 promoted M2 polarization of microglia and macrophages in vivo, and attenuated cerebral ischemia in the MCAO mouse model. Thus, the newly‐identified secreted protein FAM19A3 modulates the microglia/macrophage polarization dynamics and ameliorates cerebral ischemia.
Improving Communication-specific Coping after Traumatic Brain Injury: Evaluation of a New Treatment using Single-case Experimental Design
Authors: Douglas Jacinta M. , Knox Lucy , De Maio Carren , Bridge Helen
Published: January 2015

Background and aims: Impaired communication is a well-documented and enduring consequence of traumatic brain injury (TBI). As a result of this impairment, people with TBI frequently experience communication breakdown and associated stress. Typically, we use communication-specific coping strategies in situations characterised by communication breakdown. Productive strategies enhance message transfer; non-productive strategies do little to resolve problems and frequently result in negative social interaction. This research aimed to evaluate the effectiveness of a new treatment, Communication-specific Coping Intervention (CommCope-I), which specifically targets coping in the context of communication breakdown.

Method: Single-case experimental design (A–B–A with follow-up using multiple probes) across two participants was used. Participants were Samantha, a 30-year-old woman who had sustained severe TBI 8 years previously, and Thomas, a 34-year-old man who had sustained severe TBI when he was 29 years old. CommCope-I is a 6-week programme which targets personally relevant productive coping strategies identified collaboratively with the client. Productive coping scripts are developed and practised through a series of graded scenarios that are evaluated with the aid of video recording.

Results: Percentage of non-overlapping corrected data (PNCD) was used to analyse the results. PNCD involves a data-correction procedure to remove baseline trend from the data series prior to calculating the change produced as a result of intervention. A large treatment effect was demonstrated in both participants (PNCD: end of treatment Samantha = 100%, Thomas = 100%, 3-month follow-up Samantha = 100%, Thomas = 100%). These results are consistent with highly effective treatment.

Conclusions: This study provides sound phase-1 evidence for the effectiveness of CommCope-I.
Reproducibility and validity of an FFQ to assess usual intake of methyl-group donors
Authors: Pauwels Sara , Doperé Ine , Huybrechts Inge , Godderis Lode , Koppen Gudrun , Vansant Greet
Published: January 2015

Objective

To develop and validate a novel FFQ to assess the daily intake of four methyl-group donors (methionine, choline, betaine and folate).

Design

The relative validity of the FFQ was assessed by comparison with 7 d estimated diet records (n 80) and its reproducibility was evaluated by repeated administrations 6 weeks apart (n 92). Paired Student t tests were used to compare group means and de-attenuated intra-class correlations to investigate the ability of the FFQ to rank individuals according to their methyl-group donor intake. De-attenuated intra-class correlation coefficients were calculated between the test and reference method for methionine, choline, betaine, folate and the sum of methyl-group donors. The weighted kappa (κw) was calculated as a measure of tertile agreement.

Setting

Flanders, Belgium.

Subjects

The FFQ was validated among Flemish women of reproductive age (18–35 years).

Results

The questionnaire had an acceptable ranking ability (r=0·32–0·68; κw=0·10–0·35), but overestimated the daily intake of folate (280·6 μg v. 212·0 μg) and betaine (179·1 mg v. 147·0 mg) compared with the 7 d estimated diet record. Cross-classification analysis indicated that 20 % (choline) of the participants were grossly misclassified in the validation study. The correlation between repeated administrations was good (r=0·62–0·83) with a maximal misclassification of 7 % for betaine (κw=0·44–0·66).

Conclusions

These results indicate that this newly developed FFQ is a reliable instrument with acceptable validity for ranking individuals according to methyl-group donor intake (except for a poor agreement for choline (κw=0·10) and a fair ranking ability for betaine (r=0·32)) in Flemish women of reproductive age.
A design of ring-shaped dual-band/multi-band circularly polarized microstrip antenna based on slots mutual coupling
Authors: Alizadeh Farzad , Ghobadi Changiz , Nourinia Javad , Dadashi Mahdi , Barzegari Rahim
Published: January 2015

A new approach for designing a single-feed circular microstrip antenna with dual-band/multi-band circularly polarized (CP) radiation are demonstrated and studied experimentally. It is presented that by embedding pairs of asymmetrical ring-shaped arc slots to the boundary of both circular patch and the ground plane the impedance bandwidth of the antenna increases. This can be achieved by making use of both mutual coupling between the resonances of the ring-shaped arc slots and the fundamental resonances of the circular antenna. Also, by extending the ring-shaped arc slots out with narrow slots, the circular microstrip patch antenna can perform dual-band/multi-band CP radiation. Further details of the proposed CP microstrip antenna designs are described, and typical experimental results are presented and discussed.
The Genetic Basis for Cognitive Ability, Memory, and Depression Symptomatology in Middle-Aged and Elderly Chinese Twins
Authors: Xu Chunsheng , Sun Jianping , Ji Fuling , Tian Xiaocao , Duan Haiping , Zhai Yaoming , Wang Shaojie , Pang Zengchang , Zhang Dongfeng , Zhao Zhongtang , Li Shuxia , Hjelmborg Jacob v.B. , Christensen Kaare , Tan Qihua
Published: January 2015

The genetic influences on aging-related phenotypes, including cognition and depression, have been well confirmed in the Western populations. We performed the first twin-based analysis on cognitive performance, memory and depression status in middle-aged and elderly Chinese twins, representing the world's largest and most rapidly aging population. The sample consisted of 384 twin pairs with a median age of 50 years. Cognitive function was measured using the Montreal Cognitive Assessment (MoCA) scale; memory was assessed using the revised Wechsler Adult Intelligence scale; depression symptomatology was evaluated by the self-reported 30-item Geriatric Depression (GDS-30)scale. Both univariate and multivariate twin models were fitted to the three phenotypes with full and nested models and compared to select the best fitting models. Univariate analysis showed moderate-to-high genetic influences with heritability 0.44 for cognition and 0.56 for memory. Multivariate analysis by the reduced Cholesky model estimated significant genetic (rG= 0.69) and unique environmental (rE= 0.25) correlation between cognitive ability and memory. The model also estimated weak but significant inverse genetic correlation for depression with cognition (-0.31) and memory (-0.28). No significant unique environmental correlation was found for depression with other two phenotypes. In conclusion, there can be a common genetic architecture for cognitive ability and memory that weakly correlates with depression symptomatology, but in the opposite direction.
Häusliche Gewalt
Authors: Hepp Urs , Borst Ulrike
Published: January 2015

Häusliche Gewalt umfasst jede Form physischer, sexueller und psychischer Gewalt, bei der zwischen Opfer und Täter eine emotionale Bindung, meist eine Paarbeziehung, besteht. Diese Form von Gewalt erfolgt in der Regel zuhause unter Ausschluss von Zeugen. Die Ursachen für Gewalt sind oft vielschichtig, und eine einfache Zuordnung in Täter und Opfer ist nicht immer möglich und sinnvoll. Es geht im Einzelfall darum, zu verstehen, wie es zu Gewalt gekommen ist und was die aufrechterhaltenden Bedingungen sind. Der vorliegende Artikel befasst sich mit häuslicher Gewalt unter Erwachsenen.
The Nuclear Splicing Factor RNA Binding Motif 5 Promotes Caspase Activation in Human Neuronal Cells, and Increases after Traumatic Brain Injury in Mice
Authors: Jackson Travis C , Du Lina , Janesko-Feldman Keri , Vagni Vincent A , Dezfulian Cameron , Poloyac Samuel M , Jackson Edwin K , Clark Robert SB , Kochanek Patrick M
Published: January 2015

Splicing factors (SFs) coordinate nuclear intron/exon splicing of RNA. Splicing factor disturbances can cause cell death. RNA binding motif 5 (RBM5) and 10 (RBM10) promote apoptosis in cancer cells by activating detrimental alternative splicing of key death/survival genes. The role(s) of RBM5/10 in neurons has not been established. Here, we report that RBM5 knockdown in human neuronal cells decreases caspase activation by staurosporine. In contrast, RBM10 knockdown augments caspase activation. To determine whether brain injury alters RBM signaling, we measured RBM5/10 protein in mouse cortical/hippocampus homogenates after controlled cortical impact (CCI) traumatic brain injury (TBI) plus hemorrhagic shock (CCI+HS). The RBM5/10 staining was higher 48  to 72 hours after injury and appeared to be increased in neuronal nuclei of the hippocampus. We also measured levels of other nuclear SFs known to be essential for cellular viability and report that splicing factor 1 (SF1) but not splicing factor 3A (SF3A) decreased 4  to 72 hours after injury. Finally, we confirm that RBM5/10 regulate protein expression of several target genes including caspase-2, cellular FLICE-like inhibitory protein (c-FLIP), LETM1 Domain-Containing Protein 1 (LETMD1), and amyloid precursor-like protein 2 (APLP2) in neuronal cells. Knockdown of RBM5 appeared to increase expression of c-FLIP(s), LETMD1, and APLP2 but decrease caspase-2.
Chirality-selected phase behaviour in ionic polypeptide complexes
Authors: Perry Sarah L. , Leon Lorraine , Hoffmann Kyle Q. , Kade Matthew J. , Priftis Dimitrios , Black Katie A. , Wong Derek , Klein Ryan A. , Pierce Charles F. , Margossian Khatcher O. , Whitmer Jonathan K. , Qin Jian , de Pablo Juan J. , Tirrell Matthew
Published: January 2015

Polyelectrolyte complexes present new opportunities for self-assembled soft matter. Factors determining whether the phase of the complex is solid or liquid remain unclear. Ionic polypeptides enable examination of the effects of stereochemistry on complex formation. Here we demonstrate that chirality determines the state of polyelectrolyte complexes, formed from mixing dilute solutions of oppositely charged polypeptides, via a combination of electrostatic and hydrogen-bonding interactions. Fluid complexes occur when at least one of the polypeptides in the mixture is racemic, which disrupts backbone hydrogen-bonding networks. Pairs of purely chiral polypeptides, of any sense, form compact, fibrillar solids with a β-sheet structure. Analogous behaviour occurs in micelles formed from polypeptide block copolymers with polyethylene oxide, where assembly into aggregates with either solid or fluid cores, and eventually into ordered phases at high concentrations, is possible. Chirality is an exploitable tool for manipulating material properties in polyelectrolyte complexation.
Portable diffuse reflectance infrared Fourier transform (DRIFT) technique for the non-invasive identification of canvas ground: IR spectra reference collection
Authors: Manfredi M. , Barberis E. , Rava A. , Robotti E. , Gosetti F. , Marengo E.
Published: January 2015

Sixteen of the most important canvas grounds used since the XIV to the XX century were prepared following the ancient recipes (including grounds from Vasari, Caravaggio, and De Chirico) and a reference library of DRIFT spectra was built.
Density gradients at hydrogel interfaces for enhanced cell penetration
Authors: Simona B. R. , Hirt L. , Demkó L. , Zambelli T. , Vörös J. , Ehrbar M. , Milleret V.
Published: January 2015

Interfacial crosslinking density gradients represent a simple strategy to overcome the challenge of the limited penetration of cells seeded on the surface of hydrogels. The strategy here-presented can be used both when cells need to be seeded after hydrogel processing and to enable cell migration through hydrogel elements additively manufactured.
DNA-cellulose: an economical, fully recyclable and highly effective chiral biomaterial for asymmetric catalysis
Authors: Benedetti Erica , Duchemin Nicolas , Bethge Lucas , Vonhoff Stefan , Klussmann Sven , Vasseur Jean-Jacques , Cossy Janine , Smietana Michael , Arseniyadis Stellios
Published: January 2015

We report here the first generation of a DNA-based catalyst bound to a cellulose matrix. The chiral biomaterial is commercially available, trivial to use, highly selective and fully recyclable.
Chiral habit selection on nanostructured epitaxial quartz films
Authors: Carretero-Genevrier Adrián , Gich Martí , Picas Laura , Sanchez Clément , Rodriguez-Carvajal Juan
Published: January 2015

Understanding the crystallization of enantiomorphically pure systems can be relevant to diverse fields such as the study of the origins of life or the purification of racemates. Here we report on polycrystalline epitaxial thin films of quartz on Si substrates displaying two distinct types of chiral habits that never coexist in the same film. We combine Atomic Force Microscopy (AFM) analysis and computer-assisted crystallographic calculations to make a detailed study of these habits of quartz. By estimating the surface energies of the observed crystallites we argue that the films are enantiomorphically pure and we briefly outline a possible mechanism to explain the habit and chiral selection in this system.
Liquid coordination complexes: a new class of Lewis acids as safer alternatives to BF3 in synthesis of polyalphaolefins
Authors: Hogg James M. , Coleman Fergal , Ferrer-Ugalde Albert , Atkins Martin P. , Swadźba-Kwaśny Małgorzata
Published: January 2015

Low-viscosity polyalphaolefins were synthesised using AlCl3-based liquid coordination complexes (LCCs), in a sustainable and economically competitive process.
Nature of the charged head group dictates the anticancer potential of lithocholic acid-tamoxifen conjugates for breast cancer therapy
Authors: Yadav Kavita , Bhargava Priyanshu , Bansal Sandhya , Singh Manish , Gupta Siddhi , Sandhu Geeta , Kumar Sandeep , Sreekanth Vedagopuram , Bajaj Avinash
Published: January 2015

Anticancer drug Tamoxifen is modified to charged lithocholic acid derived amphiphile for enhanced cytotoxicity against breast cancer cells.
Functional chromatographic technique for natural product isolation
Authors: Lau Eric C. , Mason Damian J. , Eichhorst Nicole , Engelder Pearce , Mesa Celestina , Kithsiri Wijeratne E. M. , Gunaherath G. M. Kamal B. , Gunatilaka A. A. Leslie , La Clair James J. , Chapman Eli
Published: January 2015

Natural product discovery arises through a unique interplay between chromatographic purification and protein affinity.
1D chains, 2D networks and 3D interdigitated frameworks of isoorotic acid or 4,4′-bipyridyl and isoorotic acid: syntheses, structures, and sorption properties
Authors: Haldar Ritesh , Gurunatha K. L. , Sikdar Nivedita , Maji Tapas Kumar
Published: January 2015

Five new coordination polymers, from 1D chains to a 2D sheet and finally 3D porous frameworks, have been synthesized with different transition metals. The 3D interdigitated framework of Ni(ii) is explored further for stepwise CO2 and C2H2 storage.
Sandmeyer cyanation of arenediazonium tetrafluoroborate using acetonitrile as a cyanide source
Authors: Xu Wenbin , Xu Qinghui , Li Jizhen
Published: January 2015

Palladium-catalyzed cyanation of aryldiazonium tetrafluoroborate using acetonitrile as a non-metallic cyanide source was achieved in the presence of Ag2O under ambient air, eliminating the involvement of highly toxic CuCN used in the traditional Sandmeyer reaction, in which the CN group comes from metallic cyanides.
Novel 3,6-unsymmetrically disubstituted-1,2,4,5-tetrazines: S-induced one-pot synthesis, properties and theoretical study
Authors: Li Chen , Ge Haixia , Yin Bing , She Mengyao , Liu Ping , Li Xiangdong , Li Jianli
Published: January 2015

18 unprecedented 3,6-unsymmetrically disubstituted-1,2,4,5-tetrazines were synthesized, and their spectral and electrochemical properties are studied. A systematic theoretical investigation based on DFT calculations was carried out.
Non-invasive chemical assessment of living human spermatozoa
Authors: Edengeiser Eugen , Meister Konrad , Bründermann Erik , Büning Steffen , Ebbinghaus Simon , Havenith Martina
Published: January 2015

Confocal Raman microspectroscopy was used to chemically image single and living human spermatozoa under near-physiological conditions.
Host–guest interaction between fluoro-substituted azobenzene derivative and cyclodextrins
Authors: Zhang Lingxing , Zhang Huan , Gao Fei , Peng Huiying , Ruan Yonghong , Xu Yuanze , Weng Wengui
Published: January 2015

This system is completely opposite to the conventional azobenzene/β-CD system in that cis-F-azo-COOH fits β-CD more tightly than its trans form.
Opacity and plasmonic properties of Ag embedded glass based metamaterials
Authors: Mathpal Mohan Chandra , Kumar Promod , Kumar Sachin , Tripathi Anand Kumar , Singh Manish Kumar , Prakash Jai , Agarwal Arvind
Published: January 2015

Opacity variations with increasing annealing temperatures in Ag+-exchange soda-lime glass.
Promoting effects of lanthanum on the catalytic activity of Au/TiO2 nanotubes for CO oxidation
Authors: Zhang Ping , Guo Jiuli , Zhao Peng , Zhu Bolin , Huang Weiping , Zhang Shoumin
Published: January 2015

TEM image of Au/La2O3–TiO2-NTs. Gold particles were distributed homogeneously on La modified TiO2 NTs.
Length-dependent rectification and negative differential resistance in heterometallic n-alkanedithiol junctions
Authors: Shao Jian , Zhang X. Y. , Zheng Yue , Wang Biao , Chen Yun
Published: January 2015

The transport properties of heterometallic n-alkanedithiol junctions were investigated via first-principles calculations.
Cu(ii) immobilized on aminated epichlorohydrin activated silica (CAES): as a new, green and efficient nanocatalyst for preparation of 5-substituted-1H-tetrazoles
Authors: Razavi Nasrin , Akhlaghinia Batool
Published: January 2015

Reusable nanocatalyst was prepared and characterized an efficient and environmentally benign method of 5-substituted-1H-tetrazole synthesis was introduced.
Palladium catalyzed ortho-halogenation of 2-arylbenzothiazole and 2,3-diarylquinoxaline
Authors: Santra Sourav Kumar , Banerjee Arghya , Khatun Nilufa , Samanta Asim , Patel Bhisma K.
Published: January 2015

A Pd-catalysed mono and di-o-halogenation strategy has been demonstrated selectively using benzothiazoles and quinoxalines as the directing substrates.
Stacking of ultra-thin reduced graphene oxide nanoparticles in supramolecular structures for optoelectronic applications
Authors: Kumar Manish , Kumar Sandeep
Published: January 2015

Small graphene nanoparticles with sizes of 55–85 nm can be easily prepared, functionalized and dispersed in the supramolecular order of DLCs. The dispersion of graphene nanoparticles improves the order in the columnar phase and enhances conductivity.
Stereoselective ring-opening polymerization of rac-lactides catalyzed by titanium complexes containing N,N-bidentate phenanthrene derivatives
Authors: Gao Bo , Duan Qian , Li Yanhui , Li Dongni , Zhang Liqiu , Cui Yuan , Hu Ninghai , Pang Xuan
Published: January 2015

Titanium complexes bearing N,N-bidentate diamido derived from Schiff bases were investigated as catalysts for lactide polymerization.
2D covalent triazine framework: a new class of organic photocatalyst for water splitting
Authors: Jiang Xue , Wang Peng , Zhao Jijun
Published: January 2015

We identify 2D covalent triazine framework (CTF) as a new family of visible-light-driven photocatalyst for water splitting using first-principles simulation, which fulfils the search for organic counterparts of inorganic photocatalysts.
Ni0.31Co0.69S2nanoparticles uniformly anchored on a porous reduced graphene oxide framework for a high-performance non-enzymatic glucose sensor
Authors: Li Guilin , Huo Huanhuan , Xu Cailing
Published: January 2015

Ni0.31Co0.69S2nanoparticle/reduced graphene oxide (Ni0.31Co0.69S2/rGO) composites have been synthesizedviahydrothermal method, and then applied as the active materials for a high-performance non-enzymatic glucose sensor.
Self-assembled antibacterial coating by N-halamine polyelectrolytes on a cellulose substrate
Authors: Liu Ying , Li Jing , Cheng Xiaoli , Ren Xuehong , Huang T. S.
Published: January 2015

In this research, two N-halamine polymer precursors, a cationic homopolymer poly((3-acrylamidopropyl)trimethylammonium chloride) (CHP) and an anionic homopolymer poly(2-acrylamido-2-methylpropane sulfonic acid sodium salt) (AHP), have been successfully synthesized and coated onto cotton fabrics via a layer-by-layer (LbL) deposition technique.
A potential naphtho[2,1-b:3,4-b′]dithiophene-based polymer with large open circuit voltage for efficient use in organic solar cells
Authors: Kim Yu Jin , Cheon Ye Rim , Jang Jae-Wan , Kim Yun-Hi , Park Chan Eon
Published: January 2015

We designed a new copolymer, PNDT-BTN with NDT and alkoxy-naphthalene units. PNDT-BDT showed an effectively lowered HOMO level by inducing non-planarity, resulting in enhanced VOC.
O-GlcNAcylation of co-activator-associated arginine methyltransferase 1 regulates its protein substrate specificity
Authors: Charoensuksai Purin , Kuhn Peter , Wang Lu , Sherer Nathan , Xu Wei
Published: January 2015

O-GlcNAcylation (O-linked-β-N-acetylglucosaminidation) sites of CARM1 (co-activator-associated arginine methyltransferase 1) have been mapped to four possible sites. O-GlcNAc (O-linked-β-N-acetylglucosamine)-depleted CARM1 generated by three different methods displays different substrate specificity from that of wild-type CARM1, suggesting that O-GlcNAcylation of CARM1 is an important determinant for CARM1 substrate specificity.
A simplified algorithm for calculating benthic nutrient fluxes in river systems
Authors: Billen Gilles , Garnier Josette , Silvestre Marie
Published: January 2015

Benthic organic matter microbial oxidation is the basic process by which oxidants such as oxygen, nitrate and sulphate are consumed in sediments, while ammonium and phosphate are released. Although these processes play a crucial role in river biogeochemistry, their modelling remains a difficult challenge. Thouvenot et al. [J. Hydrol., 341, 55–78, 2007; 379, 239–250, 2009] have proposed a model of the processes involved in organic matter degradation in a vertical gradient of oxic to anoxic conditions, considering one upper fluid, erodable sediment layer, with transient behaviour, overlaying a compacted sediment layer assumed to be at steady state. In this paper, we present a thorough analysis of the response of Thouvenot's model to the various constraints affecting benthic processes, according to a conceptual interpretative framework relating the nutrient fluxes across the sediment–water interface to the depth-integrated value of certain sediment properties, such as their oxidant demand and their total ammonification rate. Based on this analysis, we propose a new alternative algorithm simplifying the calculation of the benthic fluxes. This algorithm is designed to be suitable for inclusion in any model of in-stream biogeochemical processes.
Circummandibular Wires for Treatment of Dentoalveolar Fractures Adjacent to Edentulous Areas: A Report of Two Cases
Authors: Maloney Karl
Published: January 2015

In general, dentoalveolar fractures are a common injury seen in emergency departments, dental offices, and oral and maxillofacial surgery practices. These injuries can be the result of direct trauma or indirect trauma. Direct trauma more often causes trauma to the maxillary dentition due to the exposure of the maxillary anterior teeth. Indirect trauma is usually the result of forced occlusion secondary to a blow to the chin or from a whiplash injury. Falls are the most common mechanism of injury seen in the pediatric group. In adolescents, many of these fractures are sustained during sporting activities. However, the use of mouth guards and other protective equipment has decreased this number. Most adult injuries are caused by motor vehicle accidents, contact sports, falls, bicycles, interpersonal violence, medical/dental mishaps, and industrial accidents. Early intervention to reduce and stabilize the fracture is required to establish a bony union and ensure correct function. Most dentoalveolar fractures have bilateral stable adjacent dentition and are treated with a closed technique utilizing an acid-etch/resin splint followed by splint removal at 4 weeks. Other inferior stabilization treatments used are arch bars and other wiring techniques. It is widely accepted that semirigid stabilization techniques, such as an acid-etch/resin splint or wiring procedures, are adequate to treat dentoalveolar fractures. This is in contrast to the treatment of mandible fractures where AO principles of rigid fixation are often followed. Fractures that are unable to be reduced sometimes necessitate an open reduction followed by internal fixation, sometimes using a secondary splint for mobile teeth. In those rare cases when there are not stable adjacent teeth bilaterally other modalities must be considered. In the present report, two cases are presented where circummandibular wires were used to treat fractured mandibular dentoalveolar segments adjacent to edentulous areas.
Stochastic Liouville equations for femtosecond stimulated Raman spectroscopy
Authors: Agarwalla Bijay Kumar , Ando Hideo , Dorfman Konstantin E. , Mukamel Shaul
Published: January 2015

Electron and vibrational dynamics of molecules are commonly studied by subjecting them to two interactions with a fast actinic pulse that prepares them in a nonstationary state and after a variable delay period T, probing them with a Raman process induced by a combination of a broadband and a narrowband pulse. This technique, known as femtosecond stimulated Raman spectroscopy (FSRS), can effectively probe time resolved vibrational resonances. We show how FSRS signals can be modeled and interpreted using the stochastic Liouville equations (SLE), originally developed for NMR lineshapes. The SLE provide a convenient simulation protocol that can describe complex dynamics caused by coupling to collective bath coordinates at much lower cost than a full dynamical simulation. The origin of the dispersive features that appear when there is no separation of timescales between vibrational variations and the dephasing time is clarified.
Measurements of population densities of metastable and resonant levels of argon using laser induced fluorescence
Authors: Nikolić M. , Newton J. , Sukenik C. I. , Vušković L. , Popović S.
Published: January 2015

We present a new approach to measure population densities of Ar I metastable and resonant excited states in low temperature Ar plasmas at pressures higher than 1 Torr. This approach combines the time resolved laser induced fluorescence technique with the kinetic model of Ar. The kinetic model of Ar is based on calculating the population rates of metastable and resonant levels by including contributions from the processes that affect population densities of Ar I excited states. In particular, we included collisional quenching processes between atoms in the ground state and excited states, since we are investigating plasma at higher pressures. We also determined time resolved population densities of Ar I 2 p excited states by employing optical emission spectroscopy technique. Time resolved Ar I excited state populations are presented for the case of the post-discharge of the supersonic flowing microwave discharge at pressures of 1.7 and 2.3 Torr. The experimental set-up consists of a pulsed tunable dye laser operating in the near infrared region and a cylindrical resonance cavity operating in TE111 mode at 2.45 GHz. Results show that time resolved population densities of Ar I metastable and resonant states oscillate with twice the frequency of the discharge.
Multiple Fano interferences in a plasmonic metamolecule consisting of asymmetric metallic nanodimers
Authors: Le Khai Q. , Alù Andrea , Bai Jing
Published: January 2015

We theoretically explore signatures of plasmonic Fano interferences in a subwavelength plasmonic metamolecule consisting of closely packed asymmetric gold nanodimers, which lead to the possibility of generating multiple Fano resonances in the scattering spectrum. This spectral feature is attributed to the interference between bright and dark plasmonic modes sustained by the constituent nanodimers. The excited Fano dips are highly sensitive in both wavelength and amplitude to geometry and background dielectric medium. The tunability of induced Fano resonances associated with enhanced electric fields from the visible to infrared region provides promising applications, particularly in refractive index sensing, light-trapping, and photon up-converting.
Investigation of the mechanism of impurity assisted nanoripple formation on Si induced by low energy ion beam erosion
Authors: Koyiloth Vayalil Sarathlal , Gupta Ajay , Roth Stephan V. , Ganesan V.
Published: January 2015

A detailed mechanism of the nanoripple pattern formation on Si substrates generated by the simultaneous incorporation of pure Fe impurities at low energy (1 keV) ion beam erosion has been studied. To understand and clarify the mechanism of the pattern formation, a comparative analysis of the samples prepared for various ion fluence values using two complimentary methods for nanostructure analysis, atomic force microscopy, and grazing incidence small angle x-ray scattering has been done. We observed that phase separation of the metal silicide formed during the erosion does not precede the ripple formation. It rather concurrently develops along with the ripple structure. Our work is able to differentiate among various models existing in the literature and provides an insight into the mechanism of pattern formation under ion beam erosion with impurity incorporation.
A stable high-speed rotational transmission system based on nanotubes
Authors: Cai Kun , Yin Hang , Wei Ning , Chen Zhen , Shi Jiao
Published: January 2015

A stable rotational transmission system is designed with a single-walled carbon nanotube (SWCNT)-based motor and double-walled carbon nanotubes (DWCNTs)-based bearing. The system response is investigated using molecular dynamics (MD) simulation. It is found that the rotating motor can actuate the rotation of the inner tube in bearing because of the attraction between the two adjacent coaxial ends of motor and rotor (the inner tube in bearing). To have a stable nanostructure, each carbon atom on the adjacent ends of motor and rotor is bonded with a hydrogen atom. To obtain a stable high-speed rotational transmission system, both an armchair and a zigzag model are used in MD simulation. In each model, the motor with different diameters and rotational speeds is employed to examine the rotational transmission of corresponding DWCNTs. It is demonstrated that the long range van der Waals interaction between the adjacent ends of motor and rotor leads to a stable configuration of the adjacent ends, and further leads to a stable rotation of rotor when driven by a high-speed motor. As compared with the armchair model, the rotor in the zigzag model could reach a stable rotation mode much easier.
Solution of coupled integral equations for quantum scattering in the presence of complex potentials
Authors: Franz Jan
Published: January 2015

In this paper, we present a method to compute solutions of coupled integral equations for quantum scattering problems in the presence of a complex potential. We show how the elastic and absorption cross sections can be obtained from the numerical solution of these equations in the asymptotic region at large radial distances.
Experimental and theoretical realization of enhanced light scattering spectroscopy of gold nanorods
Authors: Li Yunbo , Song Linlin , Qiao Yisha
Published: January 2015

Assisted with transmission electron microscopy and extinction spectra, the enhanced light scattering (ELS) experiments were performed with gold nanoparticles. Although both the nanospheres and nanorods can enhance light scattering in study aggregation, the spectral characteristics of gold nanorods is relatively simple compared to that of nanospheres. This will further extend the application range of ELS method to determinate the amounts of inorganic ions in analytical field and investigate on the macromolecular aggregation in polymeric research due to its simplicity, rapidity, and sensitivity.
Room temperature giant baroresistance and magnetoresistance and its tunability in Pd doped FeRh
Authors: Kushwaha Pallavi , Bag Pallab , Rawat R.
Published: January 2015

We report room temperature giant baroresistance (≈128%) in Fe49(Rh0.93Pd0.07)51. With the application of external pressure (P) and magnetic field (H), the temperature range of giant baroresistance (≈600% at 5 K, 19.9 kilobars and 8 T) and magnetoresistance (≈ −85% at 5 K and 8 T) can be tuned from 5 K to well above room temperature. It is shown that under external pressure, antiferromagnetic state is stabilized at room temperature and shows giant magnetoresistance (≈−55%). Due to coupled magnetic and lattice changes, the isothermal change in resistivity at room temperature under pressure (at constant H) as well as magnetic field (at constant P) can be scaled together to a single curve, when plotted as a function of X = T + 12.8 × H − 7.3 × P.
Controllable terahertz conductivity in single walled carbon nanotube/polymer composites
Authors: Polley Debanjan , Barman Anjan , Mitra Rajib Kumar
Published: January 2015

Terahertz (THz) conductivity of single walled carbon nanotube (SWNT)/poly-vinyl alcohol (PVA) composites has been studied in the frequency window of 0.3–2.0 THz. SWNT/PVA composite films with a constant thickness of 300 ± 20 μm are grown by dispersing required amount of SWNT in PVA solution via a slow drying process at room temperature under ambient condition. THz time domain spectroscopic measurements have been performed in transmission geometry at room temperature under N2 atmosphere and THz conductivity spectra have been extracted from the time domain data. It is found that conductivity of these samples can be efficiently tuned by changing the length of the SWNTs and also the SWNT weight fraction. For the highest weight fraction at a frequency of 1.5 THz, longer SWNT sample (average length ∼ 15 μm) showed 80% increased conductivity than its shorter counterpart (average length ∼ 2 μm) of the same diameter (1–2 nm). Shielding effectiveness of the samples has also been engineered by simply changing the effective length of SWNT inclusion in the polymer matrix. A modified Universal Dynamic Response model is applied to analyze the conductivity spectra of the samples.
166Er Mössbauer spectroscopy study of magnetic ordering in a spinel-based potential spin-ice system: CdEr2S4
Authors: Legros Anaëlle , Ryan D. H. , Dalmas de Réotier P. , Yaouanc A. , Marin C.
Published: January 2015

166Er Mössbauer spectroscopy measurements of CdEr2S4 show a large hyperfine field (Bhf) of 727.6(8) T at 5 K and clear evidence for slow paramagnetic relaxation with an energy barrier to reversal of 114(3) K. This behaviour stands in strong contrast to that of the corresponding pyrochlores (Er2Sn2O7 and Er2Ti2O7) where no magnetic effects are seen down to 1.56 K. The clearly dynamic 166Er Mössbauer spectra and the absence of a break in the susceptibility data suggest that there is no magnetic order above 1.8 K in CdEr2S4.