bluuebunny/crossref_metadata_2025 huggingface dataset:
ChemInform Abstract: NNP‐Type Pincer Imidazolylphosphine Ruthenium Complexes: Efficient Base‐Free Hydrogenation of Aromatic and Aliphatic Nitriles under Mild Conditions.
Authors: Adam Rosa , Alberico Elisabetta , Baumann Wolfgang , Drexler Hans‐Joachim , Jackstell Ralf , Junge Henrik , Beller Matthias
Published: July 2016

A novel class of the title pincer complexes is designed and the BH4‐derivative (NPR) is used as catalyst for the highly efficient hydrogenation of a variety of nitriles to the corresponding amines.
ChemInform Abstract: 1,4‐Bis‐Dipp/Mes‐1,2,4‐triazolylidenes: Carbene Catalysts That Efficiently Overcome Steric Hindrance in the Redox Esterification of α‐ and β‐Substituted α,β‐Enals.
Authors: Yatham Veera Reddy , Harnying Wacharee , Kootz Darius , Neudoerfl Joerg‐M. , Schloerer Nils E. , Berkessel Albrecht
Published: July 2016

Redox esterification of the title compounds is achieved for the first time using a novel, triazole‐based N‐heterocyclic carbene (NHC) catalyst.
ChemInform Abstract: Rhodium‐Catalyzed Enantioselective Cycloisomerization to Cyclohexenes Bearing Quaternary Carbon Centers.
Authors: Park Jung‐Woo , Chen Zhiwei , Dong Vy M.
Published: July 2016

The title reaction of various α,α‐bisallylaldehydes provides cylohex‐3‐encarbaldehydes which are inaccessible by Diels—Alder cycloadditions.
ChemInform Abstract: Synergistic Catalysis: Pd(II) Catalyzed Oxidation of 1,4‐Dihydroquinones in the Pd(II) Catalyzed 1,4‐Oxidation of Cyclic 1,3‐Dienes.
Authors: Zheng Bin , Schmidt Michael A. , Eastgate Martin D.
Published: July 2016

Conditions for the oxidation of cyclic 1,3‐dienes with benzoic acid or various complex chiral acids to 1,4‐dicarboxylated cycloalk‐2‐enes are elaborated.
ChemInform Abstract: Amine‐Bis(phenolate) Iron(III)‐Catalyzed Formal Hydroamination of Olefins.
Authors: Zhu Kailong , Shaver Michael P. , Thomas Stephen P.
Published: July 2016

The reaction tolerates 1,1‐disubstituted, tri‐ as well as well tetra‐substituted olefins which are efficiently hydroaminated with various nitroarenes using phenylsilane as the reducing agent.
ChemInform Abstract: Synthesis of N‐Acylsulfenamides Through Aerobic Cross Dehydrogenative Coupling of Thiols and Amides by Supported Copper Hydroxide Catalyst.
Authors: Sakagami Konomi , Jin Xiongjie , Suzuki Kosuke , Yamaguchi Kazuya , Mizuno Noritaka
Published: July 2016

N‐Acylsulfenamides are prepared by supported copper hydroxide‐catalyzed aerobic cross‐dehydrogenative coupling of arylthiols and cyclic amides.
ChemInform Abstract: Nano‐Pd/Al(OH)3‐Catalyzed Suzuki—Miyaura Coupling Reaction of Potassium Aryl‐ and Heteroaryltrifluoroborates with Electrophiles in Alcohols.
Authors: Zhu Tingting , Li Xing , Chang Honghong , Gao Wenchao , Wei Wenlong
Published: July 2016

This method uses catalyst loadings as low as 0.1 mol%.
ChemInform Abstract: Ru‐Catalyzed C—H Arylation of Fluoroarenes with Aryl Halides.
Authors: Simonetti Marco , Perry Gregory J. P. , Cambeiro Xacobe C. , Julia‐Hernandez Francisco , Arokianathar Jude N. , Larrosa Igor
Published: July 2016

The first method for the fluoroarylation of aryl halides lacking a directing group is elaborated.
ChemInform Abstract: Convenient Approach to ω‐Aminoalkylthiophenes.
Authors: Shvydenko Tetiana , Nazarenko Kostiantyn , Shvydenko Kostiantyn , Filimonchuk Serhii , Vlasenko Yurii , Tolmachev Andrei , Kostyuk Aleksandr
Published: July 2016

The title thiophenes are prepared in three steps via synthesis of ω‐aminoalkylthiophene hydrobromides (V) from cyclic enaminoester, isothiocyanates, and haloketones.
ChemInform Abstract: Easy Access to a Library of Alkylindoles: Reductive Alkylation of Indoles with Carbonyl Compounds and Hydrosilanes under Indium Catalysis.
Authors: Nomiyama Shota , Hondo Takehiro , Tsuchimoto Teruhisa
Published: July 2016

Various functionalized indoles are alkylated with a diverse range of alkyl, aryl or hetaryl aldehydes or ketones following a practical and scalable one or two step procedure.
ChemInform Abstract: Indole Synthesis via Cobalt(III)‐Catalyzed Oxidative Coupling of N‐Arylureas and Internal Alkynes.
Authors: Zhang Zhuo‐Zhuo , Liu Bin , Xu Jing‐Wen , Yan Sheng‐Yi , Shi Bing‐Feng
Published: July 2016

The cobalt‐catalyzed oxidative annulation of N‐arylureas and internal alkynes for the construction of indoles is reported.
ChemInform Abstract: Easy Construction of Furo[2,3‐f]isoindole Core by the IMDAV Reaction Between 3‐(Furyl)allylamines and α,β‐Unsaturated Acid Anhydrides.
Authors: Zubkov Fedor I. , et al.
Published: July 2016

The vinylogues of furfurylamines, generated in situ from the corresponding aldehydes (I), (VII), (IX), are studied in a tandem N‐acylation/intramolecular [4 + 2] cycloaddition with unsaturated anhydrides (III) and (V), respectively.
ChemInform Abstract: Silica‐Grafted Basic Amino Acids as Environmentally Benign Catalysts for the Solventless Synthesis of Cyclic Carbonates from Epoxides and CO2 under Metal‐Free and Halide‐Free Conditions.
Authors: Hajipour Abdol Reza , Heidari Yasaman , Kozehgary Gholamreza
Published: July 2016

Silica‐supported L‐histidine efficiently catalyzes the solvent‐free reaction of epoxides from styrene and terminal alkenes with carbon dioxide to the cyclic carbonates in high yields.
ChemInform Abstract: Convenient One‐Step Synthesis of Benzo[c]phenanthridines by Three‐Component Reactions of Isochromenylium Tetrafluoroborates and Stilbenes in Acetonitrile.
Authors: Chen Gang‐Gang , Wei Jun‐Qiang , Yang Xiaoliang , Yao Zhu‐Jun
Published: July 2016

The metal‐free procedure provides the products in an operationally simple, diastereoselective one‐step manner.
ChemInform Abstract: Synthesis of 5,6‐Dihydropyrazolo[5,1‐a]isoquinolines Through Indium(III)‐Promoted Halocyclizations of N‐Propargylic Sulfonylhydrazones.
Authors: Li Ren‐Hao , Ding Cheng‐Ke , Jiang Ya‐Nan , Ding Zong‐Cang , An Xiao‐Ming , Tang Hai‐Tao , Jing Qi‐Wei , Zhan Zhuang‐Ping
Published: July 2016

A variety of 5,6‐dihydropyrazolo[5,1‐a]isoquinolines is prepared by halocyclization of N‐propargylic sulfonylhydrazones with indium trihalide.
ChemInform Abstract: Synthetic Study on the T3P®‐Promoted One‐Pot Preparation of 1‐Substituted‐3,4‐dihydro‐β‐carbolines by the Reaction of Tryptamine with Carboxylic Acids.
Authors: Abranyi‐Balogh Peter , Foeldesi Tamas , Gruen Alajos , Volk Balazs , Keglevich Gyoergy , Milen Matyas
Published: July 2016

A one‐pot procedure for the synthesis of 1‐substituted‐3,4‐dihydro‐β‐carbolines from tryptamine and the corresponding aliphatic and (hetero)aromatic carboxylic acids using T3P as the condensation reagent is reported.
ChemInform Abstract: Generation of Complex Azabicycles and Carbobicycles from Two Simple Compounds in a Single Operation Through a Metal‐Free Six‐Step Domino Reaction.
Authors: Bock Christina M. , Parameshwarappa Gangajji , Boenisch Simon , Neiss Christian , Bauer Walter , Hampel Frank , Goerling Andreas , Tsogoeva Svetlana B.
Published: July 2016

This unprecedented two‐component six‐step chemodivergent domino reaction provides a straightforward, sustainable and atom economical route to difficult‐to‐access complex bicyclic architectures whose ratios can be controlled by the applied electrophiles and catalysts.
ChemInform Abstract: Palladium‐Catalyzed C‐7 Selective C—H Carbonylation of Indolines for Expedient Synthesis of Pyrroloquinazolinediones.
Authors: Wang Pei‐Long , Li Yan , Ma Lan , Luo Chen‐Guang , Wang Zhen‐Yu , Lan Quan , Wang Xi‐Sheng
Published: July 2016

The reaction tolerates multiple substituents.
ChemInform Abstract: Stereoselective Synthesis of 2,3‐Unsaturated Pseudoglycosides Promoted by Ultrasound
Authors: Regueira Juliana L. L. F. , Dantas Claudio R. , de Freitas Jucleiton J. R. , Santos da Silva Anderson J. F. , Freitas Filho Joao R. , Menezes Paulo H. , Freitas Juliano C. R.
Published: July 2016

by α‐selective glycosidation of several alcohols with tri‐O‐acetyl‐D‐glucal as the glycosyl donor
ChemInform Abstract: Noncyanogenic Cyanoglucoside Cyclooxygenase Inhibitors from Simmondsia chinensis
Authors: Abdel‐Mageed Wael M. , et al.
Published: July 2016

isolation and structure elucidation of simmonosides A (I) and B(II)
ChemInform Abstract: Marinopyrones A—D, α‐Pyrones from Marine‐Derived Actinomycetes of the Family Nocardiopsaceae.
Authors: Kang Heonjoong , et al.
Published: July 2016

isolation and structure elucidation of marinopyrone A (Ia), marinopyrone B (Ib), marinopyrone C (II), and marinopyrone D (III)
ChemInform Abstract: Photoluminescent Carbon Nanostructures
Authors: Kozak Ondrej , Sudolska Maria , Pramanik Goutam , Cigler Petr , Otyepka Michal , Zboril Radek
Published: July 2016

Review: 570 refs.
ChemInform Abstract: Development of Highly Active Chiral Titanium Catalysts for the Enantioselective Addition of Various Organometallic Reagents to Aldehydes
Authors: Harada Toshiro
Published: July 2016

Review: [56 refs.
ChemInform Abstract: Green Catalytic Process for Cyclic Carbonate Synthesis from Carbon Dioxide under Mild Conditions
Authors: Lang Xian‐Dong , He Liang‐Nian
Published: July 2016

Review: [108 refs.
ChemInform Abstract: Extending the Substrate Scope for the Asymmetric Iridium‐Catalyzed Hydrogenation of Minimally Functionalized Olefins by Using Biaryl Phosphite‐Based Modular Ligand Libraries
Authors: Pamies Oscar , Magre Marc , Dieguez Montserrat
Published: July 2016

Review: [32 refs.
ChemInform Abstract: Synthesis and Signification of 1,4‐Dihydropyridine Analogs in Different Pharmaceutical Drug
Authors: Nangare Ajit. K. , Kakad Sudarshan B. , Chavan Amit. N. , Bole Sandesh S.
Published: July 2016

Review: 29 refs.
ChemInform Abstract: Features of Homolytic Organophosphorus Synthesis and Its Application
Authors: Novakov I. A. , Rakhimov A. I.
Published: July 2016

Review: 25 refs.
ChemInform Abstract: Chemical Modification in the Design of Immobilized Enzyme Biocatalysts: Drawbacks and Opportunities
Authors: Rueda Nazzoly , dos Santos Jose C. S. , Ortiz Claudia , Torres Rodrigo , Barbosa Oveimar , Rodrigues Rafael C. , Berenguer‐Murcia Angel , Fernandez‐Lafuente Roberto
Published: July 2016

Review: [82 refs.
ChemInform Abstract: Coordination Polymer Gels: Soft Metal—Organic Supramolecular Materials and Versatile Applications
Authors: Sutar Papri , Maji Tapas Kumar
Published: July 2016

Review: 119 refs.
ChemInform Abstract: Photoresponsive Gelators
Authors: Draper Emily R. , Adams Dave J.
Published: July 2016

Review: 141 refs.
ChemInform Abstract: Computational Studies on Cinchona Alkaloid‐Catalyzed Asymmetric Organic Reactions
Authors: Tanriver Gamze , Dedeoglu Burcu , Catak Saron , Aviyente Viktorya
Published: July 2016

Review: 75 refs.
ChemInform Abstract: Recent Advances in the Application of 2‐Dimensional Gas Chromatography with Soft and Hard Ionisation Time‐of‐Flight Mass Spectrometry in Environmental Analysis
Authors: Alam Mohammed S. , Harrison Roy M.
Published: July 2016

Review: 143 refs.
MOF‐Based Mixed‐Matrix Membranes in Gas Separation – Mystery and Reality
Authors: Friebe Sebastian , Diestel Lisa , Knebel Alexander , Wollbrink Alexander , Caro Jürgen
Published: July 2016

Microporous additives like nanosized metal‐organic framework (MOF) particles can improve the gas separation performance of polymer membranes. These membranes which consist of added filler particles in a continuous polymer phase are called mixed‐matrix membranes (MMM). While inorganic zeolites and organic polymers do not match well, the preparation of defect‐free MOF‐based MMMs is much easier. However, some problems can also occur during the preparation. Solutions how to avoid them and prepare perfect MMMs are given. In practical gas separation, the selectivity of the MMMs was found to be even higher than predicted by the Maxwell model.
Sorption and Desorption of Copper and Cadmium in a Contaminated Soil Affected by Soil Amendments
Authors: Li Ping , Lang Man , Wang Xing‐Xiang , Zhang Tao‐Lin
Published: July 2016

Sorption and desorption processes control the bioavailability of heavy metals in the environment. Soil incubation and batch experiments were conducted to evaluate the effects of soil amendments on sorption, and desorption of Cu2+ and Cd2+ in a contaminated acidic paddy soil. The study showed that limestone and silicon fertilizer increased Cu2+ and Cd2+ sorption 2.43‐ and 1.13‐fold, which was higher than calcium magnesium phosphate, Chinese milk vetch, pig manure, and peat. The Freundlich equation fitted sorption of Cu2+ and Cd2+ better than the Langmuir and Temkin equations. High desorption percentages of sorbed Cu2+ (mean of 67.1%) and Cd2+ (mean of 78.2%) were observed from the contaminated soil. Limestone and silicon fertilizer significantly decreased the desorption percentage of sorbed Cu2+ to 11.4 and 40.0%, respectively, and significantly decreased the desorption percentage of sorbed Cd2+ to 42.5 and 61.0%, respectively. However, the other four amendments did not show significant impact. Increasing soil pH significantly increased contents of sorbed Cu2+ and Cd2+, and negatively influenced desorption of sorbed Cu2+ and Cd2+. Application of amendments changed Cu and Cd fractions in soils, which might affect the sorption and desorption of Cu2+ and Cd2+. The effects of soil amendments on sorption and desorption of heavy metals may be useful for predication of their remedy efficiency to heavy metal contamination.
A comparison of absolute performance of different correlative and mechanistic species distribution models in an independent area
Authors: Shabani Farzin , Kumar Lalit , Ahmadi Mohsen
Published: July 2016

To investigate the comparative abilities of six different bioclimatic models in an independent area, utilizing the distribution of eight different species available at a global scale and in Australia. Global scale and Australia. We tested a variety of bioclimatic models for eight different plant species employing five discriminatory correlative species distribution models (SDMs) including Generalized Linear Model (GLM), MaxEnt, Random Forest (RF), Boosted Regression Tree (BRT), Bioclim, together with CLIMEX (CL) as a mechanistic niche model. These models were fitted using a training dataset of available global data, but with the exclusion of Australian locations. The capabilities of these techniques in projecting suitable climate, based on independent records for these species in Australia, were compared. Thus, Australia is not used to calibrate the models and therefore it is as an independent area regarding geographic locations. To assess and compare performance, we utilized the area under the receiver operating characteristic (ROC) curves (AUC), true skill statistic (TSS), and fractional predicted areas for all SDMs. In addition, we assessed satisfactory agreements between the outputs of the six different bioclimatic models, for all eight species in Australia. The modeling method impacted on potential distribution predictions under current climate. However, the utilization of sensitivity and the fractional predicted areas showed that GLM, MaxEnt, Bioclim, and CL had the highest sensitivity for Australian climate conditions. Bioclim calculated the highest fractional predicted area of an independent area, while RF and BRT were poor. For many applications, it is difficult to decide which bioclimatic model to use. This research shows that variable results are obtained using different SDMs in an independent area. This research also shows that the SDMs produce different results for different species; for example, Bioclim may not be good for one species but works better for other species. Also, when projecting a “large” number of species into novel environments or in an independent area, the selection of the “best” model/technique is often less reliable than an ensemble modeling approach. In addition, it is vital to understand the accuracy of SDMs' predictions. Further, while TSS, together with fractional predicted areas, are appropriate tools for the measurement of accuracy between model results, particularly when undertaking projections on an independent area, AUC has been proved not to be. Our study highlights that each one of these models (CL, Bioclim, GLM, MaxEnt, BRT, and RF) provides slightly different results on projections and that it may be safer to use an ensemble of models.
Direct injection of HILIC fractions on the reversed‐phase trap column improves protein identification rates for salivary proteins
Authors: Fichtenbaum Andreas , Schmid Rainer , Mitulović Goran
Published: July 2016

Online combination of hydrophilic interaction chromatography (HILIC) and RP chromatography for separation of tryptic peptides is a challenging approach due to the incompatibility of direct loading HILIC fractions on the RP trapping column. High amounts of organic modifiers in loading solvents decrease the binding efficiency of tryptic peptides on C18 phases and lower the number of identifications. A 500 μL loop upfront of the trapping column filled with aqueous mobile phase was employed as a mixing chamber and enabled direct injections and improved saliva protein identification rates of HILIC fractions.
Advances in Upgrading Lignin Pyrolysis Vapors by Ex Situ Catalytic Fast Pyrolysis
Authors: Xu Lujiang , Zhang Ying , Fu Yao
Published: July 2016

Lignin, a highly branched, substituted, mononuclear aromatic polymer, is one of the principal components of lignocellulosic biomass. Its valorization is considered an important part of the modern biorefinery scheme. However, as a result of the natural complexity and high stability of lignin, its depolymerization and the following conversion are challenging. The unique structure and composition of lignin offer many possible routes to produce liquid fuels and chemicals. Recognized as an efficient and feasible process, ex situ catalytic fast pyrolysis (CFP) has attracted much attention for upgrading lignin and lignin pyrolysis vapors. The main challenge of this process is the development of active and stable catalysts that can effectively break the C−O bond of lignin and decompose the intermediates. In this Review, we aim to provide an overview of recent advances on a related topic. The Review introduces ex situ CFP, the reactions and pathways of lignin vapors in the ex situ CFP process, and summarizes in detail recent progress in experimental studies on upgrading lignin‐derived model phenols, lignin, and lignin pyrolysis vapors to hydrocarbons by the ex situ CFP process over different catalysts.
The effects of carbamazepine in the intrahippocampal kainate model of temporal lobe epilepsy depend on seizure definition and mouse strain
Authors: Twele Friederike , Töllner Kathrin , Bankstahl Marion , Löscher Wolfgang
Published: July 2016

Objective

Mesial temporal lobe epilepsy (TLE) with hippocampal sclerosis is a predominant form of acquired epilepsy, characterized by recurrent simple and complex partial seizures that are often resistant to treatment. Mice developing spontaneous recurrent nonconvulsive and convulsive seizures after intrahippocampal injection of the excitotoxic glutamate agonist kainate are thought to represent a valuable model of mesial TLE. Epileptic electroencephalogram (EEG) activity recorded in this model from the kainate focus in the ipsilateral hippocampus is resistant to antiseizure drugs such as carbamazepine (CBZ). We compared the efficacy of CBZ in this model in two different mouse strains (FVB/N and NMRI). Furthermore, we evaluated whether changes in the definition of electrographic seizures affect the antiseizure efficacy of CBZ.

Methods

As in previous studies, two types of epileptic EEG activity were defined: high‐voltage sharp waves (HVSWs) and hippocampal paroxysmal discharges (HPDs). The characteristics of these paroxysmal EEG events in epileptic mice were compared with EEG criteria for nonconvulsive seizures in patients. For HVSWs, different spike frequencies, interevent intervals, and amplitudes were used as inclusion and exclusion criteria. In addition to CBZ, some experiments were performed with diazepam (DZP) and phenobarbital (PB).

Results

Female epileptic FVB/N mice predominantly exhibited frequent HVSWs, but only infrequent HPDs or secondarily generalized convulsive seizures. Slight changes in HVSW definition determined whether they were resistant or responsive to CBZ. Male NMRI mice exhibited both HVSWs and HPDs. HVSWs were more resistant than HPDs to suppression by CBZ. Both types of epileptic EEG activity were rapidly suppressed by DZP and PB.

Significance

The data demonstrate that focal electrographic seizures in the intrahippocampal kainate mouse model are less resistant than previously thought. Both mouse strain and the criteria chosen for definition of EEG seizures determine whether such seizures are drug‐resistant or ‐responsive.
Superfluidity: a flexible functional architecture for 5G networks
Authors: Bianchi Giuseppe , Biton Erez , Blefari‐Melazzi Nicola , Borges Isabel , Chiaraviglio Luca , de la Cruz Ramos Pedro , Eardley Philip , Fontes Francisco , McGrath Michael J. , Natarianni Lionel , Niculescu Dragos , Parada Carlos , Popovici Matei , Riccobene Vincenzo , Salsano Stefano , Sayadi Bessem , Thomson John , Tselios Christos , Tsolis George
Published: July 2016

We propose the innovative architecture of Superfluidity, a Horizon 2020 project, co‐funded by the European Union. Superfluidity targets 5G networks, by addressing key network operator challenges with a multi‐pronged approach, based on the concept of a flexible, highly adaptive, superfluid network. Superfluidity supports rapid service deployment and migration in a heterogeneous network environment, regardless of the underlying hardware. The overall proposal offers advanced capabilities in terms of service deployment and interoperability, while guaranteeing high‐performance levels end‐to‐end. Copyright © 2016 John Wiley & Sons, Ltd.
EPA's Next Generation Compliance: What It Is and What It Means
Authors: Bromer Alexandra Magill
Published: July 2016

Although the regulated community may not agree, the Environmental Protection Agency (EPA) believes it is hurting for dollars. From the EPA's perspective, there is good reason for concern.
Distributed Energy and Low Carbon vs. Consumers, Regulators, and Tin Men
Authors: Makholm Jeff D.
Published: July 2016

Economists, regulators, engineers, corporations, and climate activists all search for means to decarbonize the emissions footprint of the electric power industry. It is a pressing search as global electricity demand continues to grow quickly (particularly in the developing world) and fossil fuels continue to dominate generation. (See Exhibit 1.)
Problematizing HRD in SMEs: A “Critical” Exploration of Context, Informality, and Empirical Realities
Authors: Nolan Ciara T. , Garavan Thomas N.
Published: July 2016

Small and medium‐sized enterprises (SMEs) represent the backbone of the global economy and therefore are an integral part of the HRD research agenda. The HRD literature has predominantly focused on both large firms and formal practices, and as a consequence HRD in SMEs is considered deficient. In this article, we question these assumptions by invoking Mingers’ (2000) “four aspects of being critical” framework. We argue that the current knowledge base is flawed as research has not moved beyond the deficiency model to explore, accommodate, and explain HRD in the SME setting. The role of SME context and informality is insufficiently conceptualized in the literature. We make theoretical and methodological recommendations to advance HRD research.
Collaborative Interpersonal Psychotherapy for HIV‐Positive Women in Kenya: A Case Study From the Mental Health, HIV and Domestic Violence (MIND) Study
Authors: Opiyo Elizabeth , Ongeri Linnet , Rota Grace , Verdeli Helen , Neylan Thomas , Meffert Susan
Published: July 2016

We examine the efficacy of nonspecialists delivering interpersonal psychotherapy (IPT) to HIV‐positive (HIV+) women. We describe a case in which local personnel without prior mental health training delivered IPT for the treatment of depression and posttraumatic stress disorder in an HIV+ woman who reported experiencing gender‐based violence and was enrolled in HIV care at the Family AIDS, Care, Education and Services program in Kisumu, Kenya.
A Note on the Order of Iterated Line Digraphs
Authors: Dalfó C. , Fiol M. A.
Published: July 2016

Given a digraph G, we propose a new method to find the recurrence equation for the number of vertices of the k‐iterated line digraph , for , where . We obtain this result by using the minimal polynomial of a quotient digraph of G.
Hydrogen isotope exchange with highly active iridium(I) NHC/phosphine complexes: a comparative counterion study
Authors: Kerr William J. , Mudd Richard J. , Owens Philippa K. , Reid Marc , Brown Jack A. , Campos Sebastien
Published: July 2016

Herein, we present a range of substrates that undergo hydrogen isotope exchange with an iridium(I) N‐heterocyclic carbene/phosphine complex bearing the less coordinating tetrakis[3,5‐bis(trifluoromethyl)phenyl]borate counterion and compare these with labelling using the equivalent, more established hexafluorophosphate complex. The changes in reactivity and selectivity of these complexes in a series of solvents are examined. Copyright © 2016 John Wiley & Sons, Ltd.
Molecular typing of human herpesvirus 8 among HIV positive in comparison to HIV‐negative individuals in Iran
Authors: Varmazyar Sajad , Shoja Zabihollah , Kakavand‐Ghalehnoei Rezvan , Shahmahmoodi Shohreh , Marashi Sayed Mahdi , Jalilvand Somayeh
Published: July 2016

It is still unclear whether different HHV‐8 genotypes may have different pathogenic and tumorigenic properties associated with a diverse rate of disease progression. In some areas where genotype C was found to be prominent among classic KS patients, genotype A was shown to be more frequent among AIDS‐associated KS patients. Genotype C was previously reported to be widespread in Iran, with genotype A being less frequent among patients with classic KS although no data are available with regards to the HHV‐8 genotyping among Iranian HIV‐infected patients. In order to analyze HHV‐8 genotypes (ORF K1), six HIV‐infected patients (with or without KS), and 22 HIV‐negative subjects (classic/iatrogenic KS patients and IVDUs) were investigated using nested PCR. Genotype A was detected more frequently among HIV‐infected patients with or without KS (three out of six) whereas genotype C was found more common among HIV‐negative subjects including classic/iatrogenic KS patients and IVDSs (21 out of 22), and this difference was statistically significant (P = 0.044). In conclusion, our data further support the dominancy of HHV‐8 genotype C in Iranian general population. Moreover, genotype A was more common among HIV‐infected patients with or without KS. J. Med. Virol. 89:703–709, 2017. © 2016 Wiley Periodicals, Inc.
The rich somatic life of Wolbachia
Authors: Pietri Jose E. , DeBruhl Heather , Sullivan William
Published: July 2016

Wolbachia is an intracellular endosymbiont infecting most arthropod and some filarial nematode species that is vertically transmitted through the maternal lineage. Due to this primary mechanism of transmission, most studies have focused on Wolbachia interactions with the host germline. However, over the last decade many studies have emerged highlighting the prominence of Wolbachia in somatic tissues, implicating somatic tissue tropism as an important aspect of the life history of this endosymbiont. Here, we review our current understanding of Wolbachia–host interactions at both the cellular and organismal level, with a focus on Wolbachia in somatic tissues.
Large‐time behavior of solutions to the Rosenau equation with damped term
Authors: Wang Yinxia , Feng Gaihong
Published: July 2016

In this paper, we consider the initial value problem for the Rosenau equation with damped term. The decay structure of the equation is of the regularity‐loss type, which causes the difficulty in high‐frequency region. Under small assumption on the initial value, we obtain the decay estimates of global solutions for n≥1. The proof also shows that the global solutions may be approximated by the solutions to the corresponding linear problem for n≥2. We prove that the global solutions may be approximated by the superposition of nonlinear diffusion wave for n = 1. Copyright © 2016 John Wiley & Sons, Ltd.
Dietary supplementation with rice bran or navy bean alters gut bacterial metabolism in colorectal cancer survivors
Authors: Sheflin Amy M. , Borresen Erica C. , Kirkwood Jay S. , Boot Claudia M. , Whitney Alyssa K. , Lu Shen , Brown Regina J. , Broeckling Corey D. , Ryan Elizabeth P. , Weir Tiffany L.
Published: July 2016

Scope

Heat‐stabilized rice bran (SRB) and cooked navy bean powder (NBP) contain a variety of phytochemicals that are fermented by colonic microbiota and may influence intestinal health. Dietary interventions with these foods should be explored for modulating colorectal cancer risk.

Methods and results

A randomized‐controlled pilot clinical trial investigated the effects of eating SRB (30 g/day) or cooked navy bean powder (35 g/day) on gut microbiota and metabolites (NCT01929122). Twenty‐nine overweight/obese volunteers with a prior history of colorectal cancer consumed a study‐provided meal and snack daily for 28 days. Volunteers receiving SRB or NBP showed increased gut bacterial diversity and altered gut microbial composition at 28 days compared to baseline. Supplementation with SRB or NBP increased total dietary fiber intake similarly, yet only rice bran intake led to a decreased Firmicutes:Bacteroidetes ratio and increased SCFA (propionate and acetate) in stool after 14 days but not at 28 days.

Conclusion

These findings support modulation of gut microbiota and fermentation byproducts by SRB and suggest that foods with similar ability to increase dietary fiber intake may not have equal effects on gut microbiota and microbial metabolism.
A 220 GHz subharmonic mixer based on schottky diodes with an accurate terahertz diode model
Authors: Zhang Yong , Zhao Wei , Wang Yunfei , Ren Tianhao , Chen Yapei
Published: July 2016

This article introduces the design process of a 220 GHz subharmonic mixer with low conversion loss, which is comprised of a pair of anti‐parallel Schottky diodes (SBD). For terahertz circuits, the wavelength of the electromagnetic (EM) wave is very close to the size of devices, which results in complicated parasitic effects. This will leads to a very limited optimization space for circuits design when matching the impedance. To solve this problem, we developed the precise 3D EM planar SBD model and the field‐circuit co‐simulation method to design this terahertz mixer. The diodes are mounted on the quartz‐based suspended microstrip line. The measured results show that the single side band conversion loss is less than 12 dB during radio frequency (RF) range from 211 to 226 GHz and the minimum loss is about 5.9 dB. With the intermediate frequency fixed at 1 GHz, the conversion loss varies from 8 dB to 11.2 dB over the RF bandwidth of 211 to 221 GHz. The mixer can be applied in heterodyne receivers of terahertz systems. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 58:2311–2316, 2016
Circularly polarized Mercedes‐Benz logo antenna for GPS applications
Authors: Sung Y.J.
Published: July 2016

A novel circularly polarized antenna using a Mercedes‐Benz logo is proposed in this letter. The proposed antenna consists of the Mercedes‐Benz logo as a radiating element and a coupling circular arc as the feeding structure. The proposed antenna can operate at 1.575 GHz for GPS applications with the corresponding polarizations. A typical design is successfully implemented and simulated and measured results of the CP performance are presented and discussed. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 58:2308–2311, 2016
Ku‐band low phase noise oscillator using the high order mode loaded with L‐slot SIW resonator
Authors: Yin Jiaqing , Li Zhipeng , Zhang Ting , Bao Jingfu , Lv Juncai
Published: July 2016

This article introduces a novel high Q‐factor substrate integrated waveguide (SIW) cavity resonator and its application of Ku‐band low phase noise oscillator. Q‐factor of the proposed resonator is improved by using the L‐slot and the higher order mode. The L‐slot is placed on edge of TE102 mode field. Therefore, the L‐slot has little influence on resonant frequency but can obviously enhance roll‐off characteristic of S11. And the high order modes have the bigger Q value than fundamental mode. The negative resistance oscillator based on the proposed SIW cavity resonator is easily designed and tested. The experimental results of Ku‐band oscillator show outstanding low phase noise of −130.43 dBc/Hz at 1 MHz offset frequency from 15.55 GHz carrier frequency. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 58:2325–2328, 2016
A compact wide bandwidth bandpass filter with SIR and S‐shaped coupled spiral resonator
Authors: Son Kwang Chul , Shrestha Bhanu , Yoon Ki‐Cheol
Published: July 2016

This article proposes a compact wide bandwidth band pass filter (BPF) with a stepped impedance resonator (SIR) and an S‐shaped coupled spiral resonator. The SIR has a wide bandwidth while the S‐shaped coupled line has a compact structure due to the spiral type resonator. The BPF used the S‐shaped folded structure instead of the λg/4 transmission line to reduce the size and to enhance the performance of the BPF. The via‐hole was not used in order to keep the design simple. Due to the narrow coupling gap, the bandwidth of conventional BPFs can barely exceed 40%. However, in this work, the proposed BPF achieved a bandwidth of 68%, which is larger than the conventional filter. The experimental results in terms of insertion loss (S21) and return loss (S11) are 0.61 dB and 15.7 dB at 5.3 GHz. The smaller size of the BPF is suitable for microwave communication systems. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 58:2334–2336, 2016
Ultra‐thin miniaturized metamaterial perfect absorber for X‐band application
Authors: Sen Gobinda , Banerjee Amartya , Nurul Islam S. , Das Santanu
Published: July 2016

An Ultra‐thin Miniaturized Metamaterial Perfect Absorber operating over the X‐band frequencies with improved selectivity performance is proposed. The structure uses rectangular patches partly encircled by L‐shaped metallic strips, placed diagonally on the top plane of the component and a concentric split‐ring in the center. The component exhibits broadband absorption response over the entire X‐band range with two absorption peaks at 7.8 GHz and 9.86 GHz, respectively. The structure has been simulated for different angles of oblique incidence and it gave good results under such circumstances. Also, the thickness of the substrate is very less (about 0.07λ, with respect to the center frequency of the bandwidth) and a comparative study of the proposed structure with other similar structures available in literature is furnished to establish the improved performance of the same. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 58:2367–2370, 2016
Integrated GSM and UWB fractal monopole antenna with triple notches
Authors: Srivastava Kunal , Kumar Ashwani , Verma A. K. , Zhang Q. , Kanaujia B. K. , Dwari S.
Published: July 2016

This article presents an integrated GSM and UWB antenna with triple notches. It is designed for GSM (900 MHz) and UWB band with three notches to avoid the potential interference of WiMax at 3.4 GHz (3.06–3.54 GHz), WLAN band at 4.23 GHz (3.59–4.86 GHz) and 6.35 GHz (5.93–7.15 GHz) frequencies, respectively. Measured results are presented to validate the proposed antenna structure. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 58:2364–2366, 2016
A WLAN CMOS power amplifier with insensitive bias circuits
Authors: Joo Taehwan , Hong Songcheol
Published: July 2016

A CMOS power amplifier (PA) for IEEE 802.11b/g/n/ac applications is presented, which is implemented with a 0.13‐µm standard RF CMOS process. Integrated bias circuits for the common source (CS) and common gate (CG) power transistors are proposed, which reduce the performance sensitivities of the PA according to the variations of the bias voltage and output power. Measurements show that the proposed power amplifier achieves 17.2 dBm output power with 8.1% PAE at −34 dB EVM with MCS8, 256QAM, 40 MHz, 802.11ac signal source. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 58:2331–2334, 2016
BiCMOS tunable bandpass filters with coupled‐inductor Q‐enhancement
Authors: Al Khoury Michel , Jarry Bernard , Barelaud Bruno , Lintignat Julien
Published: July 2016

A second‐order active bandpass filter using Q‐enhanced inductors is designed in 0.25‐μm BiCMOS Qubic4x technology. The filter uses a special technique based on coupled‐inductor negative resistance generator to make the quality factor and the center frequency tunable. The obtained center frequency is 955 MHz with a 57‐MHz (3 dB) bandwidth. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 58:2396–2402, 2016
Simplified approach for design of dual‐band wilkinson power divider with three transmission line sections
Authors: Bedar Khan Zafar , Huiling Zhao , Yimin Zhang
Published: July 2016

The simplified design approach presented in this letter for realization of a dual‐band Wilkinson power divider (WPD) comprising of three transmission line sections reduces the mathematical complexity to half as compared to earlier presented work. Based on the mathematical derivation through even mode circuit analysis only, design guidelines are presented. Comparison is drawn between the new and the previous design guidelines. In order to show the efficacy of the proposed simplified design approach, a dual‐band WPD operating at 1 and 3 GHz is designed, simulated, and manufactured. The simulated and measured results show excellent conformance in the S‐parameter response. Measured figure of merits (FOMs) show good performance of the WPD. For instance, insertion loss comes out to be less than 3.3 dB, whereas return loss and isolation between the ports is better than −30 and −27 dB, respectively, at the two frequencies. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 58:2374–2377, 2016
CPW‐fed UWB hexagonal shaped antenna with additional fractal elements
Authors: Aissaoui Djelloul , Abdelghani Lamine M. , Boukli‐Hacen Noureddine , Denidni Tayeb A.
Published: July 2016

This paper presents the design, fabrication, and measurement of a novel ultra‐wideband (UWB) fractal monopole antenna. This antenna uses trapezoidal shapes with hexagonal slots to achieve highly Ultra‐Wideband characteristics. The antenna is practically fabricated and tested. Measured results show a good agreement with simulated results and demonstrate that the proposed fractal antenna provides an ultra bandwidth of about 126% ranging from 3.1 to 13.67 GHz for the reflection coefficient less than −10 dB, outperforming the basic hexagonal design. This impedance performance makes the antenna suitable for C, X, K band applications. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 58:2370–2374, 2016
Wide‐band dual‐polarized planar array antenna for K/Ka‐band wireless communication
Authors: Wu Jie , Jian Cheng Yu , Fan Yong
Published: July 2016

This letter presents the design and measured results of a wideband dual‐polarized array antenna for K/Ka‐band wireless communication. The proposed antenna is assembled with several single‐layer low‐permittivity dielectric substrates and two hollow aluminum plates. A rectangular patch, with a parasitic square patch above and a 0.5 mm‐air‐layer in between, is designed as the basic radiating element. Constrained feeding and coupling feeding are both imposed on the rectangular patches with a common ground to separate two feeding networks and optimization of the feeding networks is implemented to solve the coupling problem. As an example, an 8 × 8 array is designed and fabricated. Measured results show that a bandwidth of 21.4% from 25 GHz to 31 GHz has been achieved, with a gain more than 20 dBi and an isolation more than 30 dB for the orthogonal polarizations throughout the whole band. The cross‐polarization level is less than −20 dB. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 58:2377–2381, 2016
Reconfigurable antenna using capacitive loading to Artificial Magnetic Conductor (AMC)
Authors: Dewan Raimi , Rahim M. K. A. , Hamid M. R. , Majid H.A. , Yusoff M.F.M. , Jalil M.E.
Published: July 2016

A dual band Artificial Magnetic Conductor (AMC) with capacitive tuning of reflection phase at lower band frequency is proposed. The AMC operates at upper band of fixed frequency at 5.8 GHz while the lower band reconfigurable frequency is from 2.5 GHz up to 3.1 GHz. The simulated reconfigurable frequencies are 2.5, 2.62, and 3.10 GHz. The corresponding resonance structure for each band is circular patch and circular slotted ring with single capacitor per AMC unit cell. Subsequently, the AMC is incorporated with conventional UWB antenna. The effects of AMC capacitive tuning to UWB antenna performance are studied in terms of frequency reconfigurability, gain, and radiation patterns. Measurement is also carried out for the reflection coefficient and radiation patterns. Parametrical studies of the antenna such as the misalignment between the top and bottom substrate layers, air gap between the substrate layers, and capacitance tolerance of the capacitor to the reflection coefficients are also discussed. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 58:2422–2429, 2016
Multi‐mode resonator‐based ultra‐wideband power divider
Authors: Mondal Pratik , Kumar Parui Susanta
Published: July 2016

A 3dB broadband power divider has been designed using multi‐mode resonator (MMR) technique. It resonates in four different modes of frequencies. Out of these, three of them are responsible for broadening the operating band, which may be controlled precisely by the impedance ratio of the resonator. It shows an equal magnitude, in‐phase power division at outputs from 3.1 to 10.7 GHz, which complies the FCC defined UWB. It has advantages like single layer design, via less, compact and operating band is tunable by the dimensions of the MMR. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 58:2419–2422, 2016
A wide‐range demodulation method for FBG sensor
Authors: Chen Jiajia , Shi FuQuan , Lei Xueqin , Peng Baojin
Published: July 2016

The principle, structure design, and experimental setup of a fiber Bragg grating (FBG) sensor based on matching grating are introduced. The FBG sensor requires several fiber gratings to demodulate. This study proposes a simple signal detection method to demodulate the resonance wavelength shift of the FBG. Photodiodes convert the reflected light signal of every fiber grating into electrical signal. The reflected light signals are then collected by a computer through a data collection box. The physical quantity is reported in real time according to the calibrated data. This method has a wider range of demodulation and displays the drift of center wavelength of sensor FBG in real time. The temperature/strain cross‐sensitivity issue of FBG sensor is solved to some extent due to the same temperature drift of the same type of FBG. Experimental results show that the system has a wavelength measurement error of less than 0.009 nm, and the corresponding microstrain measurement error is less than 7.5 με. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 58:2416–2419, 2016
Broadband CPW—fed star shape patch antenna backed by rectangular ring ground plane
Authors: Deshmukh Amit A. , Agrawal Sudesh R. , Lele Kshitij A. , Ray K. P.
Published: July 2016

A novel design of broadband CPW‐fed star shape patch antenna backed by rectangular ring ground plane is proposed. The star shape patch realized by combining two triangular shape patches, yields bandwidth of more than 5 GHz (>130%). Over the bandwidth, proposed antenna shows broadside radiation pattern with a peak gain of 3 dBi. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 58:2443–2450, 2016
Wireless power transfer in near‐field communication using a current‐controlled multi loops with a loaded capacitance
Authors: Memon Mehran , Rahim Abdul , Eteng Akaa
Published: July 2016

Wireless power transfer (WPT) in near‐field communication (NFC) using current‐controlled multi loops with a loaded capacitance is demonstrated in this work. The proposed multi loops antenna design shows low mutual inductance and transfer efficiency required within the operating distance of 1 cm to 3 cm and ratio of the current between the loops was done by varying the value of loaded capacitor used in between loops. The results was changing rapidly due mismatch of impedance between antennas at different distance. Initially simulation of antenna designs were not performing therefore a new design was proposed. All antennas are first impedance matched at 1 cm but after optimization proposed antenna was matched at 3 cm. The proposed loop design show better transfer efficiency for WPT up to 3 cm. In this paper, receiving antenna is placed in different close proximity from 1 cm to 5 cm with respective to transmitting antenna. The results of conventional loop and single current‐controlled loop and proposed multi loop antenna shows that transfer efficiency of the proposed multi loop antenna is better from others and maintaining low mutual inductance at given distance. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 58:2472–2476, 2016
A compact tunable microwave bandpass filter based on liquid crystal
Authors: Jiang Di , Liu Yupeng , Yang Yuanwang , Gan Baichuan , Cao Weiping
Published: July 2016

In this Letter, with the application of liquid crystal (LC) an electrically tunable microwave filter has been designed, manufactured, and characterized. The proposed compact filter has been realized on a particularly configured cavity which was constructed with low cost inverted‐microstrip structures and conventional resonance structure. By applying low square‐wave (1KHz) voltages, low power consumption is involved. The filter responses have been allocated at k‐band of microwave frequency at which band many communications and radar applications applied. The proposed filter occupies a compact area of 19 mm × 17 mm only. The measured results have shown that the proposed filter realized the central frequency changing from 15.5 GHz to 16.5 GHz continuously with bias voltages changing between 0 and 10 V. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 58:2470–2472, 2016
A compact multilayer dual‐band bandpass filter using shunt architecture by ltcc process for global WLAN applications
Authors: Chen Li‐Ju , Lin Ken‐Huang
Published: July 2016

This investigation proposes a compact multilayer dual‐band bandpass filter design with shunt architecture. The proposed dual‐band filter has dual passband to meet the requirement of different operating frequencies. The first (I) and second (II) passbands with small insertion loss have bandwidths of around 380 and 1350 MHz to cover all IEEE 802.11 bands in different regions of the world. This dual‐band filter has multiple transmission zeros to provide high rejection level as well. The presented filter was fabricated by technology of low temperature co‐fired ceramic (LTCC), resulting in a miniaturized dimension of only 2.5 mm (L) × 2.0 mm (W) × 0.7 mm (H). Finally, the measured results are in a good agreement with the simulated ones. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 58:2493–2496, 2016
A high‐isolation linear folded mixer for ISM band in UMC 180NM CMOS technology
Authors: Bhatt Darshak , Mukherjee Jayanta , Redouté J.‐M.
Published: July 2016

This paper presents an integrated radio frequency (RF) downconversion folded mixer that operates in the 2.4 GHz industrial, scientific, and medical (ISM) band by using UMC 180 nm RF CMOS. It is implemented by using a double‐balanced transconductance switch (GmSw) configuration. The proposed mixer converts the incoming signal to a small signal RF current followed by a PMOS current mirror structure. The circuit can operate with a power supply of less than 1.8 V. A superior isolation is achieved by incorporating a novel folded structure with a CMOS local oscillator (LO) stage. The proposed folded mixer achieves 7 dB of conversion gain and 8.5 dBm of the third order input intermodulation product. The highest measured isolation between the LO‐IF, RF‐IF, and LO‐RF ports is 50, 45, and 65 dB, respectively. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 58:2461–2466, 2016