bluuebunny/crossref_metadata_2025 huggingface dataset:
Identifying Reproducible Molecular Biomarkers for Gastric Cancer Metastasis with the Aid of Recurrence Information
Authors: Li Mengyao , Hong Guini , Cheng Jun , Li Jing , Cai Hao , Li Xiangyu , Guan Qingzhou , Tong Mengsha , Li Hongdong , Guo Zheng
Published: April 2016

To precisely diagnose metastasis state is important for tailoring treatments for gastric cancer patients. However, the routinely employed radiological and pathologic tests for tumour metastasis have considerable high false negative rates, which may retard the identification of reproducible metastasis-related molecular biomarkers for gastric cancer. In this research, using three datasets, we firstly shwed that differentially expressed genes (DEGs) between metastatic tissue samples and non-metastatic tissue samples could hardly be reproducibly detected with a proper statistical control when the metastatic and non-metastatic samples were defined by TNM stage alone. Then, assuming that undetectable micrometastases are the prime cause for recurrence of early stage patients with curative resection, we reclassified all the “non-metastatic” samples as metastatic samples whenever the patients experienced tumour recurrence during follow-up after tumour resection. In this way, we were able to find distinct and reproducible DEGs between the reclassified metastatic and non-metastatic tissue samples and concordantly significant DNA methylation alterations distinguishing metastatic tissues and non-metastatic tissues of gastric cancer. Our analyses suggested that the follow-up recurrence information for patients should be employed in the research of tumour metastasis in order to decrease the confounding effects of false non-metastatic samples with undetected micrometastases.
1,25(OH)2D3 dependent overt hyperactivity phenotype in klotho-hypomorphic mice
Authors: Leibrock Christina B. , Voelkl Jakob , Kuro-o Makoto , Lang Florian , Lang Undine E
Published: April 2016

Klotho, a protein mainly expressed in kidney and cerebral choroid plexus, is a powerful regulator of 1,25(OH)2D3 formation. Klotho-deficient mice (kl/kl) suffer from excessive plasma 1,25(OH)2D3-, Ca2+- and phosphate-concentrations, leading to severe soft tissue calcification and accelerated aging. NH4Cl treatment prevents tissue calcification and premature ageing without affecting 1,25(OH)2D3-formation. The present study explored the impact of excessive 1,25(OH)2D3 formation in NH4Cl-treated kl/kl-mice on behavior. To this end kl/kl-mice and wild-type mice were treated with NH4Cl and either control diet or vitamin D deficient diet (LVD). As a result, plasma 1,25(OH)2D3-, Ca2+- and phosphate-concentrations were significantly higher in untreated and in NH4Cl-treated kl/kl-mice than in wild-type mice, a difference abrogated by LVD. In each, open field, dark-light box, and O-maze NH4Cl-treated kl/kl-mice showed significantly higher exploratory behavior than untreated wild-type mice, a difference abrogated by LVD. The time of floating in the forced swimming test was significantly shorter in NH4Cl treated kl/kl-mice compared to untreated wild-type mice and to kl/kl-mice on LVD. In wild-type animals, NH4Cl treatment did not significantly alter 1,25(OH)2D3, calcium and phosphate concentrations or exploratory behavior. In conclusion, the excessive 1,25(OH)2D3 formation in klotho-hypomorphic mice has a profound effect on murine behavior.
Engineering a d-lactate dehydrogenase that can super-efficiently utilize NADPH and NADH as cofactors
Authors: Meng Hengkai , Liu Pi , Sun Hongbing , Cai Zhen , Zhou Jie , Lin Jianping , Li Yin
Published: April 2016

Engineering the cofactor specificity of a natural enzyme often results in a significant decrease in its activity on original cofactor. Here we report that a NADH-dependent dehydrogenase (d-LDH) from Lactobacillus delbrueckii 11842 can be rationally engineered to efficiently use both NADH and NADPH as cofactors. Point mutations on three amino acids (D176S, I177R, F178T) predicted by computational analysis resulted in a modified enzyme designated as d-LDH*. The Kcat/Km of the purified d-LDH* on NADPH increased approximately 184-fold while the Kcat/Km on NADH also significantly increased, showing for the first time that a rationally engineered d-LDH could exhibit comparable activity on both NADPH and NADH. Further kinetic analysis revealed that the enhanced affinity with NADH or NADPH and the significant increased Kcat of d-LDH* resulted in the significant increase of d-LDH* activity on both NADPH and NADH. This study thus demonstrated that the cofactor specificity of dehydrogenase can be broadened by using targeted engineering approach, and the engineered enzyme can efficiently function in NADH-rich, or NADPH-rich, or NADH and NADPH-rich environment.
Amplitude dynamics favors synchronization in complex networks
Authors: Gambuzza Lucia Valentina , Gómez-Gardeñes Jesus , Frasca Mattia
Published: April 2016

In this paper we study phase synchronization in random complex networks of coupled periodic oscillators. In particular, we show that, when amplitude dynamics is not negligible, phase synchronization may be enhanced. To illustrate this, we compare the behavior of heterogeneous units with both amplitude and phase dynamics and pure (Kuramoto) phase oscillators. We find that in small network motifs the behavior crucially depends on the topology and on the node frequency distribution. Surprisingly, the microscopic structures for which the amplitude dynamics improves synchronization are those that are statistically more abundant in random complex networks. Thus, amplitude dynamics leads to a general lowering of the synchronization threshold in arbitrary random topologies. Finally, we show that this synchronization enhancement is generic of oscillators close to Hopf bifurcations. To this aim we consider coupled FitzHugh-Nagumo units modeling neuron dynamics.
Kaempferol stimulates gene expression of low-density lipoprotein receptor through activation of Sp1 in cultured hepatocytes
Authors: Ochiai Ayasa , Miyata Shingo , Iwase Masamori , Shimizu Makoto , Inoue Jun , Sato Ryuichiro
Published: April 2016

A high level of plasma low-density lipoprotein (LDL) cholesterol is considered a risk factor for atherosclerosis. Because the hepatic LDL receptor (LDLR) is essential for clearing plasma LDL cholesterol, activation of LDLR is a promising therapeutic target for patients with atherosclerotic disease. Here we demonstrated how the flavonoid kaempferol stimulated the gene expression and activity of LDLR in HepG2 cells. The kaempferol-mediated stimulation of LDLR gene expression was completely inhibited by knockdown of Sp1 gene expression. Treatment of HepG2 cells with kaempferol stimulated the recruitment of Sp1 to the promoter region of the LDLR gene, as well as the phosphorylation of Sp1 on Thr-453 and Thr-739. Moreover, these kaempferol-mediated processes were inhibited in the presence of U0126, an ERK pathway inhibitor. These results suggest that kaempferol may increase the activity of Sp1 through stimulation of Sp1 phosphorylation by ERK1/2 and subsequent induction of LDLR expression and activity.
Optimized 2D array of thin silicon pillars for efficient antireflective coatings in the visible spectrum
Authors: Proust Julien , Fehrembach Anne-Laure , Bedu Frédéric , Ozerov Igor , Bonod Nicolas
Published: April 2016

Light reflection occuring at the surface of silicon wafers is drastically diminished by etching square pillars of height 110 nm and width 140 nm separated by a 100 nm gap distance in a square lattice. The design of the nanostructure is optimized to widen the spectral tolerance of the antireflective coatings over the visible spectrum for both fundamental polarizations. Angle and polarized resolved optical measurements report a light reflection remaining under 5% when averaged in the visible spectrum for both polarizations in a wide angular range. Light reflection remains almost insensitive to the light polarization even in oblique incidence.
Identification of residues crucial for the interaction between human neuroglobin and the α-subunit of heterotrimeric Gi protein
Authors: Takahashi Nozomu , Wakasugi Keisuke
Published: April 2016

Mammalian neuroglobin (Ngb) protects neuronal cells under conditions of oxidative stress. We previously showed that human Ngb acts as a guanine nucleotide dissociation inhibitor (GDI) for the α-subunits of heterotrimeric Gi/o proteins and inhibits the decrease in cAMP concentration, leading to protection against cell death. In the present study, we used an eukaryotic expression vector driving high-level expression of human wild-type Ngb or Ngb mutants that either exhibit or lack GDI activities in human cells. We demonstrate that the GDI activity of human Ngb is tightly correlated with its neuroprotective activity. We further demonstrate that Glu53, Glu60 and Glu118 of human Ngb are crucial for both the neuroprotective activity and interaction with Gαi1. Moreover, we show that Lys46, Lys70, Arg208, Lys209 and Lys210 residues of Gαi1 are important for binding to human Ngb. We propose a molecular docking model of the complex between human Ngb and Gαi1.
What does the nose know? Olfactory function predicts social network size in human
Authors: Zou Lai-quan , Yang Zhuo-ya , Wang Yi , Lui Simon S. Y. , Chen An-tao , Cheung Eric F. C. , Chan Raymond C. K.
Published: April 2016

Olfaction is an important medium of social communication in humans. However, it is not known whether olfactory function is associated with social network size. This study aimed to explore the underlying neural mechanism between olfactory function and social network. Thirty-one healthy individuals participated in this study. Social network size was estimated using the Social Network Index. Olfactory function was assessed with the Sniffin’ Stick Test. The results showed that there is a significant positive correlation between the size of an individual’s social network and their olfactory sensitivity. We also found that amygdala functional connectivity with the orbitofrontal cortex appeared to be related to olfactory sensitivity and social network size.
Relationship between blood pressure reverse dipping and type 2 diabetes in hypertensive patients
Authors: Sun Lu , Yan Bin , Gao Ya , Su Dan , Peng Liyuan , Jiao Yang , Wang Yuhuan , Han Donggang , Wang Gang
Published: April 2016

Recent studies suggested that nocturnal variations of blood pressure (BP) were closely related to type 2 diabetes. However, little information has been revealed about the relationship between reverse-dipper pattern of BP and type 2 diabetes. In this cross-sectional study, BP variations of 531 hypertensive patients were evaluated with ambulatory BP monitoring (ABPM). Diagnosis of diabetes in Chinese adults was made according to diabetes diagnostic criteria of 2015. Multivariate logistic regression was used to examine the relationships between type 2 diabetes and ABPM results. In the study, patients with reverse-dipper pattern (32.3%) had the highest prevalence of type 2 diabetes compared with dippers (21.4%) and nondippers (23.3%). After multivariate logistic regression, reverse-dipper BP pattern (OR 2.067, P = 0.024) and nondipper BP pattern (OR 1.637, P = 0.039) were found to be correlated with type 2 diabetes compared with dipper pattern. The results of our study also suggested that type 2 diabetes might contribute to the reverse-dipper pattern of BP (OR 1.691, P = 0.023). In addition, fasting glucose was negatively correlated with the decline rate of nocturnal SBP (r = -0.095, P = 0.029). Reverse-dipper pattern of BP in ABPM may be independently associated with type 2 diabetes in patients with hypertension.
Synthesis of catalytic materials in flames: opportunities and challenges
Authors: Koirala Rajesh , Pratsinis Sotiris E. , Baiker Alfons
Published: April 2016

In this review we identify the crucial factors for the synthesis of catalytic materials by flame methods and examine their potential for controlling the chemical, physical and catalytic properties of as made catalysts.
Elucidation of the high CO2 reduction selectivity of isolated Rh supported on TiO2: a DFT study
Authors: Ma Sicong , Song Weiyu , Liu Bing , Zheng Huiling , Deng Jianlin , Zhong Wenjia , Liu Jian , Gong Xue-Qing , Zhao Zhen
Published: April 2016

Methanation and reverse water-gas shift reaction are two important reactions that could happen simultaneously during the process of CO2 reduction.
Iron-activated carbon nanocomposite: synthesis, characterization and application for lead removal from aqueous solution
Authors: Sharififard H. , Pepe F. , Soleimani M. , Aprea P. , Caputo D.
Published: April 2016

An iron-activated carbon nanocomposite synthesized by a facile, low temperature technique was successfully tested for Pb(ii) removal from aqueous solutions.
The development of a tool for measuring graduate students' topic specific pedagogical content knowledge of thin layer chromatography
Authors: Hale L. V. A. , Lutter J. C. , Shultz G. V.
Published: April 2016

Graduate students play a critical role in undergraduate education at doctorate granting institutions; but generally have minimal opportunity to develop teaching expertise. Furthermore, little is known about how graduate students develop teaching expertise in this context. We investigated the development of topic-specific pedagogical content knowledge among chemistry graduate student teaching assistants (GTAs). Thin layer chromatography was selected as the topic of investigation because undergraduate students encounter it throughout organic chemistry lab and it is connected to several foundational chemistry topics. An instrument was developed to measure both content knowledge (CK) and pedagogical content knowledge (PCK) of thin layer chromatography for GTAs with a range of teaching experience. Data from the test instrument were transformed using the Rasch model and statistically analysed. Our analysis showed that graduate students at all levels of experience performed well on content knowledge questions, but even experienced GTAs demonstrated low levels of pedagogical content knowledge. Importantly, experienced GTAs demonstrated a greater proficiency than novice GTAs, which suggests that pedagogical content knowledge is developed over time.
Deciphering the roles of multiple additives in organocatalyzed Michael additions
Authors: Günler Z. Inci , Companyó Xavier , Alfonso Ignacio , Burés Jordi , Jimeno Ciril , Pericàs Miquel A.
Published: April 2016

The synergistic effects of multiple additives (water and acetic acid) on the asymmetric Michael addition of acetone to nitrostyrene catalyzed by primary amine-thioureas (PAT) were precisely determined.
Deboronative cyanation of potassium alkyltrifluoroborates via photoredox catalysis
Authors: Dai Jian-Jun , Zhang Wen-Man , Shu Yong-Jin , Sun Yu-Yang , Xu Jun , Feng Yi-Si , Xu Hua-Jian
Published: April 2016

The radical deboronative cyanation of alkyltrifluoroborates with a broad range of functional groups is enabled by visible-light photoredox catalysis.
Cobalt(iii)-catalyzed annulation of esters and alkynes: a facile route to indenones
Authors: Yu Wenlong , Zhang Wei , Liu Zhanxiang , Zhang Yuhong
Published: April 2016

An efficient protocol for the synthesis of indenones has been developedviathe annulation of benzoic esters and internal alkynes by exploiting the cobalt catalyst.
Helical supramolecular polymerization of C3-symmetric amides and retroamides: on the origin of cooperativity and handedness
Authors: Buendía Julia , Calbo Joaquín , García Fátima , Aragó Juan , Viruela Pedro M. , Ortí Enrique , Sánchez Luis
Published: April 2016

N-centred trisamides 1 form helical aggregates with the same handedness than CO-centred trisamides 2 following a cooperative polymerization mechanism.
Controlled aqueous polymerization of acrylamides and acrylates and “in situ” depolymerization in the presence of dissolved CO2
Authors: Lloyd Danielle J. , Nikolaou Vasiliki , Collins Jennifer , Waldron Christopher , Anastasaki Athina , Bassett Simon P. , Howdle Steven M. , Blanazs Adam , Wilson Paul , Kempe Kristian , Haddleton David M.
Published: April 2016

Reversible, low temperature aqueous polymerization/depolymerization of acrylamides and acrylates in the presence of dissolved CO2.
A graphene-coupled Bi2WO6 nanocomposite with enhanced photocatalytic performance: a first-principles study
Authors: Ren Fengzhu , Zhang Jihua , Wang Yuanxu , Yao Wenzhi
Published: April 2016

Under the built-in electric field and the band edge potential well in graphene/Bi2WO6, the photogenerated electrons in Bi2WO6 can flow to graphene. Graphene can efficiently capture and transport photogenerated electrons. Photocatalytic oxidation and reduction reaction can occur on the surface of Bi2WO6 and graphene, respectively.
Identification and H(D)-bond energies of C–H(D)⋯Cl interactions in chloride–haloalkane clusters: a combined X-ray crystallographic, spectroscopic, and theoretical study
Authors: Serebryanskaya Tatiyana V. , Novikov Alexander S. , Gushchin Pavel V. , Haukka Matti , Asfin Ruslan E. , Tolstoy Peter M. , Kukushkin Vadim Yu.
Published: April 2016

An exponential correlation was found between interatomic H⋯Cl−distances and energies of the corresponding C–H⋯Cl−contacts in the solid state.
Zeta potential-assisted sorption of uranyl tricarbonate complex from aqueous solution by polyamidoxime-functionalized colloidal particles
Authors: Zhang Lixia , Huang Li , Zeng Zehua , Qian Jun , Hua Daoben
Published: April 2016

A new method has been developed for effective uranium(vi) capture from an aqueous solution through zeta potential-assisted sorption.
Correction: Water-mediated long-range interactions between the internal vibrations of remote proteins
Authors: Kuffel Anna , Zielkiewicz Jan
Published: April 2016

Correction for ‘Water-mediated long-range interactions between the internal vibrations of remote proteins’ by Anna Kuffel et al., Phys. Chem. Chem. Phys., 2015, 17, 6728–6733.
Structural and chemical evolution of methylammonium lead halide perovskites during thermal processing from solution
Authors: Nenon David P. , Christians Jeffrey A. , Wheeler Lance M. , Blackburn Jeffrey L. , Sanehira Erin M. , Dou Benjia , Olsen Michele L. , Zhu Kai , Berry Joseph J. , Luther Joseph M.
Published: April 2016

Perovskites are processed from solution; understanding the influence of solution composition on crystallization and degradation is critical to their success.
Bioavailability studies and anticancer properties of malvidin based anthocyanins, pyranoanthocyanins and non-oxonium derivatives
Authors: Oliveira Hélder , Wu Nao , Zhang Qian , Wang Jingyi , Oliveira Joana , de Freitas Victor , Mateus Nuno , He Jingren , Fernandes Iva
Published: April 2016

In this study, the gastric transport efficiency of malvidin-3-glucoside and several derivatives was assayed on the MKN-28 cell model.
Circular economy design considerations for research and process development in the chemical sciences
Authors: Clark James H. , Farmer Thomas J. , Herrero-Davila Lorenzo , Sherwood James
Published: April 2016

This perspective on the circular economy is a call for chemists to value resources through responsible product design.
Chip-based monolithic microextraction combined with ICP-MS for the determination of bismuth in HepG2 cells
Authors: Zhang Jing , Chen Beibei , Wang Han , Huang Xi , He Man , Hu Bin
Published: April 2016

Chip-based monolithic microextraction combined with ICP-MS provides a new strategy for the analysis of trace metals in cells.
TMEM45B promotes proliferation, invasion and migration and inhibits apoptosis in pancreatic cancer cells
Authors: Zhao Liang-chao , Shen Bai-yong , Deng Xia-xing , Chen Hao , Zhu Zheng-gang , Peng Cheng-hong
Published: April 2016

Silencing of TMEM45B induces apoptosis and suppresses invasion and migration in pancreatic cancer cells.
Easy and versatile coating approach for long-living white hybrid light-emitting diodes
Authors: Niklaus Lukas , Dakhil Haider , Kostrzewa Monika , Coto Pedro B. , Sonnewald Uwe , Wierschem Andreas , Costa Rubén D.
Published: April 2016

Herein, we provide a new easy-to-do protocol for preparing luminescent rubber-like materials based on a wide palette of compounds, such as small-molecules, quantum dots, polymers, and coordination complexes.
Heterostructured semiconductor nanowire arrays for artificial photosynthesis
Authors: Liu Siqi , Han Chuang , Tang Zi-Rong , Xu Yi-Jun
Published: April 2016

A critical summary and insight into recent advances in artificial photosynthesis over heterostructured semiconductor nanowire arrays have been presented, which concisely describe the current status and possible future research directions in this promising research area.
Enantioselective organocatalysis using SOMO activation
Authors: Mečiarová Mária , Tisovský Pavol , Šebesta Radovan
Published: April 2016

Enantioselective organo-SOMO activation enables radical based functionalization of carbonyl compounds.
Melt-cast materials: combining the advantages of highly nitrated azoles and open-chain nitramines
Authors: Klapötke Thomas M. , Penger Alexander , Pflüger Carolin , Stierstorfer Jörg
Published: April 2016

Combination of the nitramine 1-chloro-2-nitrazapropane and nitro-substituted azoles yielded energetic materials for potential use as TNT replacements in melt-cast formulations.
Styrenic DABCO salt-containing monomers for the synthesis of novel charged polymers
Authors: Zhang Keren , Drummey Kevin J. , Moon Nicholas G. , Chiang William D. , Long Timothy E.
Published: April 2016

Styrenic DABCO salt monomers enabled synthesis of microphase-separated ionomers with doubly-charged pendant groups.
Catalyst-free iodine-mediated living radical polymerization under irradiation over a wide visible-light spectral scope
Authors: Liu Xiaodong , Zhang Lifen , Cheng Zhenping , Zhu Xiulin
Published: April 2016

Catalyst-free iodine-mediated photo-induced solution LRP of methyl methacrylates under LED light was successfully established over a wide range of irradiation wavelengths (390–630 nm).
Synthesis of antimicrobial block copolymers bearing immobilized bacteriostatic groups
Authors: Koromilas N. D. , Lainioti G. Ch. , Vasilopoulos G. , Vantarakis A. , Kallitsis J. K.
Published: April 2016

Antimicrobial block copolymers bearing covalently bonded quaternized ammonium groups were synthesized through atom transfer radical polymerization (ATRP). Moreover, a new class of antimicrobial block copolymers were designed combining two types of biocide incorporation into one system (both contact-based and release-based mechanisms).
Dendrimeric organosiloxane with thermopolymerizable –OCFCF2 groups as the arms: synthesis and transformation to the polymer with both ultra-low k and low water uptake
Authors: Wang Jiajia , Jin Kaikai , Sun Jing , Fang Qiang
Published: April 2016

A novel fluoro-containing dendrimeric macromolecule with cyclic siloxane as the core and aryl-trifluorovinyl-ether (–OCFCF2) units as the arms was reported.
Facile synthesis of amorphous aluminum vanadate hierarchical microspheres for supercapacitors
Authors: Yan Yan , Xu Hao , Guo Wei , Huang Qingli , Zheng Mingbo , Pang Huan , Xue Huaiguo
Published: April 2016

Amorphous aluminum vanadate hierarchical microspheres with high cycling stability for supercapacitors.
Design of thermoresponsive polymeric gates with opposite controlled release behaviors
Authors: Guisasola Eduardo , Baeza Alejandro , Talelli Marina , Arcos Daniel , Vallet-Regí María
Published: April 2016

Magnetic-responsive mesoporous silica nanoparticles were coated with an engineered thermoresponsive co-polymer. The release profile can be tuned by a different grafting density and structure of the polymer with the same transition temperature (42 °C).
Synthesis and thermal energy storage properties of a solid–solid phase change material with a novel comb-polyurethane block copolymer structure
Authors: Du Xiaosheng , Wang Haibo , Cheng Xu , Du Zongliang
Published: April 2016

A novel comb-polyurethane solid–solid PCM of high thermal energy storage capability was synthesized through the reaction between diethanolamine-modified monomethoxy polyethylene glycol (MPEG) with isophorone diisocyanate and 1,4-butanediol.
Dextran-coated iron oxide nanoparticles turn protumor mesenchymal stem cells (MSCs) into antitumor MSCs
Authors: Chung Tsai-Hua , Hsieh Chia-Chu , Hsiao Jong-Kai , Hsu Szu-Chun , Yao Ming , Huang Dong-Ming
Published: April 2016

dex-IO NPs can activate the antitumor mechanism (tumor tropism) but inactivate protumor mechanisms to transform protumor MSCs (pT-MSCs) into antitumor MSCs (aT-MSCs).
Synthesis and characterization of β-lactam functionalized superparamagnetic Fe3O4@SiO2 nanoparticles as an approach for improvement of antibacterial activity of β-lactams
Authors: Esmaeilpour Mohsen , Sardarian Ali Reza , Jarrahpour Aliasghar , Ebrahimi Edris , Javidi Jaber
Published: April 2016

Preparation of magnetic β-lactam functionalized Fe3O4@SiO2 nanoparticles has a synergic effect to improve the antibacterial activity.
Enhanced thermoelectric performance in Mg and Ca substituted CdO ceramics
Authors: Gao Linjie , Wang Shufang , Liu Ran , Zha Xinyu , Sun Niefeng , Wang Shujie , Wang Jianglong , Fu Guangsheng
Published: April 2016

A high ZT of 0.5 at about 1000 K has been achieved in Cd0.94Mg0.03Ca0.03O, which is the highest ZT ever reported among n-type oxides in this temperature range.
Janus Au–mesoporous silica nanocarriers for chemo-photothermal treatment of liver cancer cells
Authors: Wang Zheng , Wang Yingshuai , Lu Mengmeng , Li Li , Zhang Yi , Zheng Xiao , Shao Dan , Li Jing , Dong Wen-fei
Published: April 2016

Synthesis of novel Janus Au–mesoporous silica nanocarriers for the effective and safe chemo-photothermal treatment of liver cancer cells.
Synthesis of poly(N-(2-hydroxypropyl) methacrylamide) brushes by interface-mediated RAFT polymerization
Authors: Yildirim Ertan , Cimen Dilek , Zengin Adem , Caykara Tuncer
Published: April 2016

A novel poly(N-(2-hydroxypropyl) methacrylamide) [poly(HPMA)] brush with a moderate density polymer brush (0.52 chains per nm2) was synthesized by an interface-mediated RAFT polymerization.
Thermoelectric power of oriented thin-film organic conductors
Authors: Sato Ryonosuke , Kiyota Yasuhiro , Kadoya Tomofumi , Kawamoto Tadashi , Mori Takehiko
Published: April 2016

The temperature dependence of thermoelectric power is investigated down to low temperatures for oriented thin films of organic conductors.
Fabrication of an EGF modified nanodiamonds-based anti-cancer drug targeted delivery system and drug carrier uptake visualization by 3D Raman microscopy
Authors: Chen Xin , Li Dandan , Wang Hong , Jiao Yuan-yuan , Wang Hao , Yu Yuan , Zhi Jinfang
Published: April 2016

We developed a nanodiamond-based anti-cancer drug targeted delivery system, epidermal growth factor–nanodiamonds–cisplatin (ENC) bioconjugate, which could selectively kill tumor cells and be located through 3D confocal Raman imaging.
In(OTf)3catalysed an expeditious synthesis of β-carboline–imidazo[1,2-a]pyridine and imidazo[1,2-a]pyrazine conjugates
Authors: Devi Nisha , Singh Dharmender , Honey Honey , Mor Satbir , Chaudhary Sandeep , Rawal Ravindra K. , Kumar Vipin , Chowdhury Asim K. , Singh Virender
Published: April 2016

β-Carboline containing alkaloids are ubiquitously present in Nature, while an imidazo[1,2-a]pyridine nucleus is incorporated in various synthetic commercial drugs and biologically previliged moieties.
Bi doped CeO2 oxide supported gold nanoparticle catalysts for the aerobic oxidation of alcohols
Authors: Santra Chiranjit , Auroux Aline , Chowdhury Biswajit
Published: April 2016

Gold nanoparticles supported on Bi–CeO2 with four different bismuth loadings (2 to 8 mol%) were prepared to determine the role of oxide vacancies in doped ceria in the benzyl alcohol oxidation reaction.
Copper-loaded hypercrosslinked polymer decorated with pendant amine groups: a green and retrievable catalytic system for quick [3 + 2] Huisgen cycloaddition in water
Authors: Mouradzadegun Arash , Alsadat Mostafavi Mahsa
Published: April 2016

A novel heterogeneous copper catalyst based on a 3D-network polymer containing pendant amine groups was synthesizedviapost-functionalization of the polymeric backbone followed by incorporation of copper(i) ions.
An effective approach to protect the Sm0.5Sr0.5Co3−δ(SSC) cathode from SO2in SOFCs
Authors: Gao Keqing , Liu Xiaotian , Wang Zhuang , Liang Chenghao , Xiong Yueping
Published: April 2016

The combination of the nanofiber structure and the Mg/Fe protective layer is an effective approach to protect the SSC cathode from SO2​in SOFCs.
Photo-thermal oxidation of single layer graphene
Authors: Islam Ahmad E. , Kim Steve S. , Rao Rahul , Ngo Yen , Jiang Jie , Nikolaev Pavel , Naik Rajesh , Pachter Ruth , Boeckl John , Maruyama Benji
Published: April 2016

Photo-thermal oxidation yields no pores in the graphene layer and suggests pathways for oxygen defect engineering in a controlled manner.
Structural evolution of alkaline earth metal stannates MSnO3 (M = Ca, Sr, and Ba) photocatalysts for hydrogen production
Authors: Zhong Fulan , Zhuang Huaqiang , Gu Quan , Long Jinlin
Published: April 2016

The alkaline earth metal stannates MSnO3 (M = Ca, Sr, and Ba) photocatalysts with different morphologies are successfully prepared by hydrothermal method and their photocatalytic activities are evaluated by photocatalytic reforming of ethanol/water solution to hydrogen.
Novel polyamide thin-film composite nanofiltration membrane modified with poly(amidoamine) and SiO2 gel
Authors: Tang Yong-Jian , Xu Zhen-Liang , Huang Ben-Qing , Wei Yong-Ming , Yang Hu
Published: April 2016

Recently, poly(amidoamine) (PAMAM) has emerged as a novel material due to its high density of functional groups, hyper-branched structure and hydrophilic nature.
A novel upconversion luminescence turn-on nanosensor for ratiometric detection of organophosphorus pesticides
Authors: Wang Shuailiang , Wang Xiaobo , Chen Xingxiang , Cao Xiaozheng , Cao Jing , Xiong Xiaofeng , Zeng Wenbin
Published: April 2016

An upconversion luminescence “turn-on” nanosensor for the ratiometric and sensitive detection of organophosphorus pesticides was fabricated.
Highly efficient As(v)/Sb(v) removal by magnetic sludge composite: synthesis, characterization, equilibrium, and mechanism studies
Authors: Wang Li , Wang Jing-mei , Zhang Ren , Liu Xin-gang , Song Guo-xin , Chen Xiao-feng , Wang Yi , Kong Ji-lie
Published: April 2016

Magnetic sludge with the unique flexibility, low thermal conductance and plentiful adsorption sites was fabricated for highly efficient As/Sb removal.
Facile synthesis of superparamagnetic magnetite nanoflowers and their applications in cellular imaging
Authors: Lu Chichong , Wang Hao , Ma Jianmei , Yuan Huanxiang , Liang Haiyan , Wu Lingrong , Chai Kyu Yun , Li Shuhong
Published: April 2016

Thermal decomposition of an iron-oleate complex in the presence of a surfactant gives water-soluble biocompatible superparamagnetic magnetite nanoflowers via a one-pot reaction.
Photoactivity of hierarchically nanostructured ZnO–PES fibre mats for water treatments
Authors: Ognibene G. , Cristaldi D. A. , Fiorenza R. , Blanco I. , Cicala G. , Scirè S. , Fragalà M. E.
Published: April 2016

Brush-like ZnO nanorods shell grown by CBD onto electrospun PES fibres as photocatalytic membranes for water purification.
Access to steroidal pyridazines via modified thiohydrazides
Authors: Volkova Y. A. , Antonov Y. S. , Komkov A. V. , Scherbakov A. M. , Shashkov A. S. , Menchikov L. G. , Chernoburova E. I. , Zavarzin I. V.
Published: April 2016

Cytotoxic effects against breast cancer cells.
Synthesis of 2-hydroxymalonic acid derivatives via tandem oxidation and rearrangement by photo organic catalysis
Authors: Okada Akifumi , Nagasawa Yoshitomo , Yamaguchi Tomoaki , Yamaguchi Eiji , Tada Norihiro , Miura Tsuyoshi , Itoh Akichika
Published: April 2016

This report describes a mild method for the direct transformation of β-oxoesters to the corresponding tartronic esters using singlet oxygen produced by a catalytic amount of methylene blue and visible light irradiation using fluorescent lamps.
Porous aerogels prepared by crosslinking of cellulose with 1,4-butanediol diglycidyl ether in NaOH/urea solution
Authors: Liu He , Wang Aiting , Xu Xu , Wang Mengmeng , Shang Shibin , Liu Shiwei , Song Jie
Published: April 2016

The cellulose aerogels were prepared by crosslinking of cellulose with 1,4-butanediol diglycidyl in NaOH/urea aqueous solution.
Thermal activation process of Au/TiO2 system: a molecular spectroscopy study
Authors: Islas S. R. , Zanella R. , Saniger J. M.
Published: April 2016

Concatenated reactions involved in the thermal activation process of the AuNPs/TiO2 system were evidenced by an in situ molecular spectroscopy study.
Enhancing graphene–metal contact using graphene square flake array sandwich structure
Authors: Guo Shixi , Li Xin , Song Hui , Cui Ping , Li Quanfu , Fang Ming , Liu Weihua , Liu Hongzhong , Su Ya feng , Zhang Anping , Wang Xiaoli
Published: April 2016

A novel graphene–metal contact structure that has an extra layer of graphene square flake (GSF) array sandwiched between the graphene channel and the metal to reduce contact resistance is designed for the first time.
Preparation and characterization of biocompatible molecularly imprinted poly(ionic liquid) films on the surface of multi-walled carbon nanotubes
Authors: Ding Haoyuan , Chen Rongfeng , Liu Mingming , Huang Rong , Du Yamei , Huang Chao , Yu Xiaoyang , Feng Xionghan , Liu Fan
Published: April 2016

A series of novel biocompatible MIPs were synthesized for BSA recognition by using MWCNTs with different outside diameters as substrates, and allyl-functionalized ionic liquids with different anion species as monomers.
An alternative technique for patterning cells on poly(ethylene glycol) diacrylate hydrogels
Authors: Peter Mathew , Tayalia Prakriti
Published: April 2016

In this work, a poly(ethylene glycol) diacrylate (PEGDA) hydrogel is patterned with a cell adhesive ligand, that was functionalized with an acrylate group using Michael type addition reaction, thus, circumventing the need for proprietary reagents.
Catalytic halodefluorination of aliphatic carbon–fluorine bonds
Authors: Goh Kelvin K. K. , Sinha Arup , Fraser Craig , Young Rowan D.
Published: April 2016

A variety of halosilanes, in conjunction with aluminum catalysts, convert fluorocarbons into higher halocarbons.
Coupled wave-packets for non-adiabatic molecular dynamics: a generalization of Gaussian wave-packet dynamics to multiple potential energy surfaces
Authors: White Alexander , Tretiak Sergei , Mozyrsky Dmitry
Published: April 2016

Coupled wave-packets for non-adiabatic dynamics is a new method for simulation of molecular dynamics on coupled potential energy surfaces, which efficiency and correctly accounts for decoherence and interferences effects.
Observation of the influence of dipolar and spin frustration effects on the magnetocaloric properties of a trigonal prismatic {Gd7} molecular nanomagnet
Authors: Pineda Eufemio Moreno , Lorusso Giulia , Zangana Karzan H. , Palacios Elias , Schnack Jürgen , Evangelisti Marco , Winpenny Richard E. P. , McInnes Eric J. L.
Published: April 2016

Adiabatic demagnetisation experiments on a C3h symmetric molecular {Gd7} cluster reveal effects of intramolecular dipolar interactions and geometric spin frustration.
Atomic defects during ordering transitions in LiNi0.5Mn1.5O4and their relationship with electrochemical properties
Authors: Casas-Cabanas Montse , Kim Chunjoong , Rodríguez-Carvajal Juan , Cabana Jordi
Published: April 2016

The existence of two types of atomic defects in ordered LiNi0.5Mn1.5O4and their effect on electrochemical properties are presented.
A high-temperature flexible supercapacitor based on pseudocapacitive behavior of FeOOH in an ionic liquid electrolyte
Authors: Shen Baoshou , Guo Ruisheng , Lang Junwei , Liu Li , Liu Lingyang , Yan Xingbin
Published: April 2016

A high-temperature flexible supercapacitor, which shows excellent electrochemical energy-storage ability and flexibility at high temperature, is constructed.
Facile shape-controlled growth of hierarchical mesoporous δ-MnO2for the development of asymmetric supercapacitors
Authors: Bag Sourav , Raj C. Retna
Published: April 2016

A novel approach for the synthesis of layered δ-MnO2for aqueous asymmetric supercapacitors with a wide potential window is developed.
Self-assembled tri-, tetra- and penta-ethylene glycols as easy, expedited and universal interfacial cathode-modifiers for inverted polymer solar cells
Authors: Cao Fong-Yi , Lai Yu-Ying , Chen Yung-Lung , Cheng Yen-Ju
Published: April 2016

Non-conjugated triethylene glycol (3-EG), tetraethylene glycol (4-EG) and pentaethylene glycol (5-EG) are presented as new cathode modification materials to achieve high-performance inverted-PCSs.
Fabrication of ultrathin solid electrolyte membranes of β-Li3PS4 nanoflakes by evaporation-induced self-assembly for all-solid-state batteries
Authors: Wang Hui , Hood Zachary D. , Xia Younan , Liang Chengdu
Published: April 2016

Evaporation-induced self-assembly produces ultrathin solid electrolyte membranes of β-Li3PS4 while maintaining its high ionic conductivity and stability with metallic Li.
Anionic metal–organic frameworks lead the way to eco-friendly high-energy-density materials
Authors: Feng Yongan , Bi Yangang , Zhao Wenyuan , Zhang Tonglai
Published: April 2016

Eco-friendly high-energy-density materials with remarkably high nitrogen contents and heats of detonation are achieved based on an anionic MOF strategy. Meanwhile, their stabilities and insensitivities are well improved by hydrogen bonds.
Cracks bring robustness: a pre-cracked NiO nanosponge electrode with greatly enhanced cycle stability and rate performance
Authors: Zhang Guoge , Wang Lan , Liu Yan , Li Wenfang , Yu Fei , Lu Wei , Huang Haitao
Published: April 2016

Microcracks are purposely introduced in an anodic NiO nanosponge, leading to a mechanically robust electrode with excellent performance for supercapacitor applications.
Ranunculus flower-like Ni(OH)2@Mn2O3 as a high specific capacitance cathode material for alkaline supercapacitors
Authors: Ren Qian , Wang Rongfang , Wang Hui , Key Julian , Brett Dan J. L. , Ji Shan , Yin Shibin , Kang Shen Pei
Published: April 2016

A novel core–shell Ni(OH)2@Mn2O3 material is presented that bears a particle morphology of striking resemblance to Ranunculus flower heads.
Enhancing the power conversion efficiency of polymer solar cells to 9.26% by a synergistic effect of fluoro and carboxylate substitution
Authors: Liu Yahui , Zhao Wenchao , Wu Yang , Zhang Jicheng , Li Guangwu , Li Wenhua , Ma Wei , Hou Jianhui , Bo Zhishan
Published: April 2016

Two conjugated polymers (P1, P2) were designed and used as donor materials for polymer solar cells. The open-circuit voltage was significantly improved to 0.85 V. The synergistic effect of combined carboxylate and fluoro functional groups promoted the PCE to as high as 9.26%.
Design of hydrogels for delayed antibody release utilizing hydrophobic association and Diels–Alder chemistry in tandem
Authors: Gregoritza Manuel , Messmann Viktoria , Goepferich Achim M. , Brandl Ferdinand P.
Published: April 2016

Hydrophobic association enables delayed antibody release from hydrogels cross-linked via Diels–Alder reaction.
Enhanced thermoelectric performance in rare-earth filled-skutterudites
Authors: Li Yulong , Qiu Pengfei , Duan Haozhi , Chen Jikun , Snyder G. Jeffrey , Shi Xun , Iversen Bo Brummerstedt , Chen Lidong
Published: April 2016

Enhanced filler filling fractions and thermoelectric performance in rare-earth filled-skutterudites by using a new non-equilibrium synthesis approach.
Phase unwrapping method based on multi‐frequency InSAR in highly sloped terrain
Authors: Zeng Tao , Liu Tiandong , Ding Zegang , Zhang Qi , Long Teng
Published: April 2016

In highly sloped terrain, the interferometric phase gradients of the adjacent pixels are more than π. Therefore, the conventional phase unwrapping methods cannot correctly obtain the absolute phase. To solve this problem, a phase unwrapping method based on multi‐frequency interferometric synthetic aperture radar (MF‐InSAR) is proposed. In this method, a joint probability density function based on MF‐InSAR is established to estimate the phase gradient in highly sloped terrain, and thanks to the small changes of the phase gradient differences between adjacent pixels, an adjacent set of the phase gradient is further proposed to improve the robust of this algorithm. After the reconstruction of phase gradients, the branch‐cut phase unwrapping method is used to obtain the ultimate absolute interferometric phase. Computer simulation proves the proposed method can correctly obtain the absolute interferometric phase in highly sloped terrain, which makes further efforts to acquire a better reconstruction accuracy of DEM.
Influence of the time‐delay of correction for BDS and GPS combined real‐time differential positioning
Authors: Wang Liang , Li Zishen , Yuan Hong , Zhao Jiaojiao , Zhou Kai , Yuan Chao
Published: April 2016

Real‐time differential (RTD) positioning can achieve a real‐time metre‐lever positioning based on the differential correction data from a nearby reference station. However, the time‐delay of correction data is generally unavoidable when receiving it from the reference station in real‐time. Multi‐global navigation satellite system combined positioning has the advantages of improving the positioning availability, continuity and accuracy; however, it remains unknown whether it can effectively overcome the time‐delay of differential correction in RTD positioning. This Letter focus on the tolerance of time‐delay for differential correction in BeiDou global navigation satellite system (BDS) and global positioning system (GPS) combined RTD positioning. Based on a set of static data and a set of dynamic data, the performances of BDS standalone, GPS standalone and BDS and GPS combined RTD positioning by 15 kinds of time‐delay of the differential correction data were studied and compared. The numerical results show that, BDS and GPS combined RTD positioning can tolerate longer time‐delay of the corrections than BDS or GPS standalone positioning for the same requested positioning accuracy.
Quaternary non‐volatile adder implemented with HfOx/TiOx/HfOx/TiOx multilayer‐based resistive RAM
Authors: Ma Wenjia , Zhou Zheng , Zhu Dongbin , Liu Lifeng
Published: April 2016

A multilayer (ML)‐based resistive RAM (RRAM) is proposed to achieve the performance of logic and memory application. Multilevel resistive switching characteristic of ML‐based RRAM is demonstrated in aspect of data storage application. An innovative method is proposed to simultaneously achieve quaternary addition and data storage application, resistance serves as physical state variable instead of voltage or charge in the computing system. An instance of quaternary non‐volatile addition is demonstrated in an experiment, which shows the ML‐based RRAM is promising for non‐volatile computational application as well as higher integration capability.
Sea clutter suppression for shipborne HFSWR using joint sparse recovery‐based STAP
Authors: Zhu Yongpeng , Wei Yinsheng , Zhu Kaihui
Published: April 2016

On the basis of the intrinsic sparsity of sea clutter in shipborne high‐frequency surface wave radar, a joint sparse recovery‐based space–time adaptive processing (STAP) technique is proposed to suppress the spread sea clutter. In the proposed method, the partial clutter subspace is first estimated with training samples from only one range cell. Afterwards, a generalised matching pursuit method using the oblique projector is derived to recover the complementary clutter subspace. The sea clutter suppressor is finally constructed by STAP. According to experimental results, the proposed method can obtain a more accurate estimation of sea clutter spectrum and thus achieve better suppression performance.
Electrical and optical properties of laser irradiation treated vertical light‐emitting diodes
Authors: Sung H.K. , Wang C. , Kim N.Y.
Published: April 2016

A comparative analysis of the properties of vertical light‐emitting diodes (VLEDs) fabricated using different surface treatment schemes was conducted. Compared with a conventional VLED, a light output power increase of 24.8% for an injection current of 350 mA was achieved by an n‐type‐gallium nitride (GaN)‐based VLED with a thin undoped GaN layer and microsized protrusions produced by krypton fluoride laser irradiation using an energy density of 600 mJ/cm2. This was accomplished without noticeable degradation of the electrical properties of the device. Further, potassium hydroxide wet etching of the VLED surface increased the light output power gain to 47.3% for the same injection current.
Electrically small folded spherical helix antennas using copper strips and 3D printing technology
Authors: Kong M. , Shin G. , Lee S.‐H. , Yoon I.‐J
Published: April 2016

Folded spherical helix (FSH) antennas using thin and wide copper strips instead of thick wires as a means of reducing the electrical size of ka is designed. It is found that FSH antennas made of copper strips show comparable radiation properties to FSH antennas made of thick wires. Furthermore, such designs can achieve even smaller size down to ka of 0.11 while keeping the radiation quality factors approaching the lower physical bound. An FSH antenna made of copper strips with ka of 0.21 is fabricated as a prototype using 3D printing technology. The measured resonance occurs at 307 MHz with the radiation efficiency of about 90%, verifying the simulated results and the proposed method of utilising copper strips in designing extremely small yet highly efficient volumetric folded helix antennas.
Fast synthesis of permanent magnet assisted synchronous reluctance motors
Authors: Bianchi Nicola , Mahmoud Hanafy , Bolognani Silverio
Published: April 2016

This paper describes a procedure for a practical synthesis of both a synchronous reluctance motor and a permanent magnet assisted synchronous reluctance motor. The procedure is completely analytical, yielding a rapid drawing of the motor geometry, taking into account both magnetic and mechanical considerations. From the application requirements, the external volume of the motor is computed. The further practical needs, such as maximum outer space, maximum available length, existing stator lamination, and so on are considered. Then, the design of the rotor geometry is carried out. The PM size is determined considering the demagnetisation limit according to the maximum current loading.
Indoor position tracking using received signal strength‐based fingerprint context aware partitioning
Authors: D'Souza Matthew , Schoots Brendan , Ros Montserrat
Published: April 2016

Mobile indoor localisation has numerous uses for logistics and health applications. Current wireless localisation systems experience reliability difficulties in indoor environments due to interference and also require a large number of wireless access points to ensure position accuracy and resolution. Localisation using wireless channel propagation characteristics, such as radio‐frequency (RF) receives signal strength are subject to wireless interference. The Fingerprint Context Aware Partitioning (FCAP) tracking model used received RF signal strength fingerprinting, combined with context aware information about the user's indoor environment. The authors show the use of context aware information in the FCAP model, reduces the effect of wireless interference and lowers the spatial density of access points required. The wireless localisation network consisted of reference nodes placed at locations in a building. Reference nodes are used by mobile nodes, to localise a user's position. The authors tested the FCAP model in a typical indoor environment and compared the performance and accuracy to other received signal strength indicator fingerprint localisation methods. They found the FCAP model had improved performance and was able to achieve a similar accuracy to other protocols, with fewer reference nodes.