bluuebunny/crossref_metadata_2025_split huggingface dataset:
ChemInform Abstract: Zn/Sc Bimetallic Relay Catalysis: One Pot Cycloisomerization/Carbonyl—Ene Reaction Toward Oxazole Derivatives.
Authors: Wang Bin , Chen Ying , Zhou Ling , Wang Jianwu , Xu Zhenghu 
Published: April 2016

AbstractA variety of oxazole derivatives is synthesized from easily available N‐(propargyl)arylamides and aromatic aldehydes using a novel Zn/Sc bimetallic relay catalyst system.
ChemInform Abstract: Simple and Highly Efficient Synthesis of 3,5‐Disubstituted Isoxazoles Using Cu/Graphene/Clay Nanohybrid as a New Heterogeneous Nano Catalyst.
Authors: Behrouz Somayeh , Rad Mohammad Navid Soltani 
Published: April 2016

AbstractA facile protocol is presented for the dipolar click cycloaddition of alkynes with in‐situ generated nitrile oxides in presence of the nanohybrid catalyst.
ChemInform Abstract: TBAI‐Catalyzed Reaction Between N‐Tosylhydrazones and Sulfur: A Procedure Toward 1,2,3‐Thiadiazole.
Authors: Chen Jiangfei , Jiang Yan , Yu Jin‐Tao , Cheng Jiang 
Published: April 2016

AbstractThe TBAI‐catalyzed direct annulation of acetophenone tosylhydrazone and sulfur powder leads to thiadiazoles in moderate to excellent yields under metal‐free conditions.
ChemInform Abstract: Utility of Bifunctional N‐Heterocyclic Phosphine (NHP)‐Thioureas for Metal‐Free Carbon—Phosphorus Bond Construction Toward Regio‐ and Stereoselective Formation of Vinylphosphonates.
Authors: Mulla Karimulla , Aleshire Kyle L. , Forster Paul M. , Kang Jun Yong 
Published: April 2016

AbstractThis novel N‐heterocyclic phosphine‐promoted phospha‐Michael/intramolecular nucleophilic substitution reaction allows for the stereoselective construction of vinyldiazaphosphonates in moderate to excellent yields.
ChemInform Abstract: Fe(OTf)3‐Mediated Synthesis of Sulfonyl Dihydropyrans.
Authors: Chang Meng‐Yang , Chen Yu‐Hsin , Cheng Yu‐Chieh 
Published: April 2016

AbstractThe reaction is not limited to β‐ketosulfones but works for selected β‐dicarbonyl compounds and deoxybenzoins like (X) as well.
ChemInform Abstract: A Versatile Approach to Flavones via a One‐Pot Pd(II)‐Catalyzed Dehydrogenation/Oxidative Boron‐Heck Coupling Sequence of Chromanones.
Authors: Lee Jun , Yu Jihyun , Son Seung Hwan , Heo Jinyuk , Kim Taelim , An Ji‐Young , Inn Kyung‐Soo , Kim Nam‐Jung 
Published: April 2016

AbstractA versatile approach to diverse flavones from readily available chromanones and arylboronic acid pinacol esters via a Pd(II)‐catalyzed dehydrogenation and oxidative boron‐Heck coupling reaction in a one‐pot sequence is developed.
ChemInform Abstract: Uncatalyzed, Highly Stereoselective Addition of α‐Morpholinostyrene to 3‐Nitro‐2‐(trihalomethyl)‐2H‐chromenes. Synthesis of trans—cis‐ and trans—trans‐3‐Nitro‐4‐phenacyl‐(2‐trihalomethyl)chromanes.
Authors: Korotaev Vladislav Yu. , Kotovich Ivan V. , Barkov Alexey Yu. , Kutyashev Igor B. , Kodess Mikhail I. , Sosnovskikh Vyacheslav Ya. 
Published: April 2016

AbstractThe diastereoselectivity of the title addition depends on the reaction temperature.
ChemInform Abstract: Cascade Alkylarylation of Substituted N‐Allylbenzamides for the Construction of Dihydroisoquinolin‐1(2H)‐ones and Isoquinoline‐1,3(2H,4H)‐diones.
Authors: Qian Ping , Du Bingnan , Jiao Wei , Mei Haibo , Han Jianlin , Pan Yi 
Published: April 2016

AbstractA metal‐free cascade functionalization of unactivated C(sp3)—H bonds and cyclization reactions of N‐substituted allylbenzamides are developed.
ChemInform Abstract: A Catalyst Free, Multicomponent‐Tandem, Facile Synthesis of Pyrido[2,3‐d]pyrimidines Using Glycerol as a Recyclable Promoting Medium.
Authors: Singh Swastika , Saquib Mohammad , Singh Mandavi , Tiwari Jyoti , Tufail Fatima , Singh Jaya , Singh Jagdamba 
Published: April 2016

AbstractAn environmentally friendly three‐component synthesis of the title compounds using glycerol as biodegradable and reusable promoting medium is developed.
ChemInform Abstract: Stereoselective Synthesis of trans‐Perfluoroalkylated [1,3]Oxazino[2,3‐a]isoquinolines from Aromatic Aldehydes, Methyl Perfluoroalk‐2‐ynoates and Isoquinolines.
Authors: Xu Zhiliang , Sun Tianqi , Cai Qiuqi , Ni Fei , Han Jing , Chen Jie , Deng Hongmei , Shao Min , Zhang Hui , Cao Weiguo 
Published: April 2016

AbstractAn efficient, one‐pot, three‐component procedure for the synthesis of fluorinated oxazinoisoquinolines with excellent regioselectivity and diastereoselectivity is presented.
ChemInform Abstract: Ni/Cu‐Catalyzed Defluoroborylation of Fluoroarenes for Diverse C—F Bond Functionalizations.
Authors: Niwa Takashi , Ochiai Hidenori , Watanabe Yasuyoshi , Hosoya Takamitsu 
Published: April 2016

AbstractThe method tolerates fluoroarenes equipped with various electron‐neutral or electron‐withdrawing substituents, including sterically hindered ones, but no electron‐withdrawing functional groups.
ChemInform Abstract: Nickel‐Catalyzed Borylation of Aryl‐ and Benzyltrimethylammonium Salts via C—N Bond Cleavage.
Authors: Hu Jiefeng , Sun Heqing , Cai Wangshui , Pu Xinghui , Zhang Yemin , Shi Zhuangzhi 
Published: April 2016

AbstractThe catalytic system is capable of activating aryl and benzyl ammonium bonds for C—N borylation to produce a variety of organoborates.
ChemInform Abstract: A Free‐Radical‐Promoted Stereospecific Decarboxylative Silylation of α,β‐Unsaturated Acids with Silanes.
Authors: Zhang Lizhi , Hang Zhaojia , Liu Zhong‐Quan 
Published: April 2016

AbstractA range of alkenyl and alkynyl organo‐silicon compounds is efficiently synthesized via decarboxylative C‐Si bond formation.
ChemInform Abstract: Preparation of Organophosphorus Compounds from P—H Compounds Using O‐(Trimethylsilyl)aryl Triflates as Aryne Precursors.
Authors: Yang Guoqiang , Shen Chaoren , Quan Mao , Zhang Wanbin 
Published: April 2016

AbstractThe practical procedure allows for the synthesis of arylphosphonates, diarylphosphinates, and aryl phosphine oxide.
ChemInform Abstract: Cytotoxic Tigliane‐Type Diterpenoids from Croton tiglium.
Authors: Zhang Dong‐Dong , Zhou Bin , Yu Jin‐Hai , Xu Cheng‐Hui , Ding Jian , Zhang Hua , Yue Jian‐Min 
Published: April 2016

AbstractThe title compounds show moderate inhibitory activity against human HL‐60 and A549 cancer cell lines.
ChemInform Abstract: Gd(OTf)3 Catalyzed Preparation of 2,3‐Unsaturated O‐, S‐, N‐, and C‐Pyranosides from Glycals by Ferrier Rearrangement.
Authors: Chen Peiran , Su Jie 
Published: April 2016

AbstractThe title reaction proceeds under mild reaction conditions in good yields with high anomeric selectivies.
ChemInform Abstract: Cristazine, a New Cytotoxic Dioxopiperazine Alkaloid from the Mudflat‐Sediment‐Derived Fungus Chaetomium cristatum.
Authors: Yun Keumja , Khong Trung Thang , Leutou Alain Simplice , Kim Gun‐Do , Hong Jongki , Lee Choong‐Hwan , Son Byeng Wha 
Published: April 2016

AbstractThe structure and absolute stereochemistry of cristazine (I), a new class of dioxopiperazine alkaloid, is presented.
ChemInform Abstract: Allahabadolactones A and B from the Endophytic Fungus, Aspergillus allahabadii BCC45335.
Authors: Sadorn Karoon , Saepua Siriporn , Boonyuen Nattawut , Laksanacharoen Pattiyaa , Rachtawee Pranee , Prabpai Samran , Kongsaeree Palangpon , Pittayakhajonwut Pattama 
Published: April 2016

AbstractTwo new natural products, allahabadolactones A (I) and B (II), are isolated from the endophytic fungus Aspergillus allahabadii BCC45335 along with several known compounds.
ChemInform Abstract: HF‐Free Hydrothermal Route for Synthesis of Highly Efficient Narrow‐Band Red Emitting Phosphor K2Si1‐xF6:xMn4+ for Warm White Light‐Emitting Diodes.
Authors: Huang Lin , Zhu Yiwen , Zhang Xuejie , Zou Rui , Pan Fengjuan , Wang Jing , Wu Mingmei 
Published: April 2016

AbstractThe title phosphor is synthesized by a new environmentally friendly hydrothermal method from solutions of SiO2, KHF2, and Mn(HPO4)2 (autoclave, 180 °C, 6 h).
ChemInform Abstract: In vacuo Interfacial Tetrapyrrole Metalation
Authors: Diller Katharina , Papageorgiou Anthoula C. , Klappenberger Florian , Allegretti Francesco , Barth Johannes V. , Auwaerter Willi 
Published: April 2016

AbstractReview: comprehensive overview of tetrapyrrole metalation at well‐defined surfaces under ultra‐high vacuum conditions, including state‐of‐the‐art methodology; 171 refs.
ChemInform Abstract: Developing and Understanding Biofluid Vibrational Spectroscopy: A Critical Review
Authors: Baker Matthew J. , Hussain Shawn R. , Lovergne Lila , Untereiner Valerie , Hughes Caryn , Lukaszewski Roman A. , Thiefin Gerard , Sockalingum Ganesh D. 
Published: April 2016

AbstractReview: 129 refs.
Clinical significance of atypical glandular cells in Pap tests: An analysis of more than 3000 cases at a large academic women's center
Authors: Pradhan Dinesh , Li Zaibo , Ocque Rebecca , Patadji Stell , Zhao Chengquan 
Published: April 2016

BACKGROUNDThe interpretation of atypical glandular cells (AGC) in Papanicolaou (Pap) tests and screening for glandular neoplasia remain challenging.METHODSPap tests with an AGC interpretation from January 2008 to December 2013 were retrieved from a pathology database, and cases with histologic follow‐up within 1 year were included in the study.RESULTSThere were 589,830 Pap tests during the study period, and 3709 cases (0.6%) were reported as AGC, which included the following: AGC, not otherwise specified (52.0%); atypical endocervical cells (28.0%); and other categories. There were 3007 cases (81.1%) with histologic follow‐up results within 1 year. Cervical intraepithelial neoplasia 2/3 (CIN2/3), cervical adenocarcinoma in situ (AIS)/adenocarcinoma, and endometrial carcinoma were identified in 5.6%, 1.9%, and 5.5% of cases, respectively. Glandular neoplasia was more likely to be identified in cases with pure AGC subcategories than cases with AGC and squamous abnormalities. Endometrial neoplasia was more likely to be identified in cases with atypical endometrial cells than other categories. Overall, the most common severe abnormality on histologic follow‐up was CIN2/3. Although CIN2/3 was the most common severe lesion in patients younger than 30 years (10.0%) and in patients aged 30 to 49 years (6.4%), endometrial carcinoma was the most common lesion in women who were 50 years old or older (13.7%). Endocervical glandular lesions (AIS and adenocarcinoma) occurred in only 1.9% of women.CONCLUSIONSAGC subtypes and ages significantly affect histological follow‐up results; 90.5% of cases with carcinoma on histologic follow‐up were either endometrial or metastatic carcinoma. This study supports the recommendation that women with AGC Pap test results should be followed up with both endocervical and endometrial sampling. Cancer Cytopathol 2016;124:589‐95. © 2016 American Cancer Society.
Hydrogenation of Carbon Dioxide to Methane by Ruthenium Nanoparticles in Ionic Liquid
Authors: Melo Catarina I. , Szczepańska Anna , Bogel‐Łukasik Ewa , Nunes da Ponte Manuel , Branco Luís C. 
Published: April 2016

AbstractThe efficient transformation of carbon dioxide into fuels can be an excellent alternative to sequestration. In this work, we describe CO2 hydrogenation to methane in imidazolium‐based ionic liquid media, using ruthenium nanoparticles prepared in situ as catalyst. The best yield of methane (69 %) was achieved using 0.24 mol % ruthenium catalyst (in [omim][NTf2], 1‐octyl‐3‐methylimidazolium bistrifluoromethanesulfonylimide, at 40 bar of hydrogen pressure plus 40 bar of CO2 pressure, and at 150 °C.
Air Oxidation of Activated Carbon to Synthesize a Biomimetic Catalyst for Hydrolysis of Cellulose
Authors: Shrotri Abhijit , Kobayashi Hirokazu , Fukuoka Atsushi 
Published: April 2016

AbstractOxygenated carbon catalyzes the hydrolysis of cellulose present in lignocellulosic biomass by utilizing the weakly acidic functional groups on its surface. Here we report the synthesis of a biomimetic carbon catalyst by simple and economical air‐oxidation of a commercially available activated carbon. Air‐ oxidation at 450–500 °C introduced 2000–2400 μmol g−1 of oxygenated functional groups on the material with minor changes in the textural properties. Selectivity towards the formation of carboxylic groups on the catalyst surface increased with the increase in oxidation temperature. The degree of oxidation on carbon catalyst was found to be proportional to its activity for hydrolysis of cellulose. The hydrolysis of eucalyptus in the presence of carbon oxidized at 475 °C afforded glucose yield of 77 % and xylose yield of 67 %.
Divide‐by‐2 LC injection‐locked frequency divider with wide locking range at low and high injection powers
Authors: Jang Sheng‐Lyang , Liu Yi‐You , Fang Chih‐Han , Lai Wen Cheng , Juang Miin‐Horng 
Published: April 2016

SummaryA wide locking range nMOS divide‐by‐2 RLC injection‐locked frequency divider (ILFD) was designed and implemented in the TSMC 0.18‐µm BiCMOS process. The ILFD is based on a cross‐coupled oscillator with one direct injection MOSFET and a RLC resonator. The RLC resonator is used to extend the locking range so that dual‐band locking ranges can be merged in one locking range at both low and high injection powers. At the drain‐source bias of 0.9 V for switching transistors, and at the incident power of 0 dBm the locking range of the divide‐by‐2 ILFD is 7.24 GHz, from the incident frequency 2.65 to 9.89 GHz, the locking range percentage is 115.47%. The power consumption of ILFD core is 8.685 mW. The die area is 0.726 × 0.930 mm2. Copyright © 2016 John Wiley & Sons, Ltd.
Internal Energy of the Classical Two‐ and Three‐Dimensional One‐Component‐Plasma
Authors: Khrapak S. A. , Khrapak A. G. 
Published: April 2016

AbstractWe summarize several semi‐phenomenological approaches to estimate the internal energy of one‐componentplasma (OCP) in two (2D) and three (3D) dimensions. Particular attention is given to a hybrid approach, which reproduces the Debye‐Hückel asymptote in the limit of weak coupling, the ion sphere (3D) and ion disc (2D) asymptotes in the limit of strong coupling, and provides reasonable interpolation between these two limits. More accurate ways to estimate the internal energy of 2D and 3D OCP are also discussed. The accuracy of these analytic results is quantified by comparison with existing data from numerical simulations. The relevance of the KTHNY theory in locating melting transition in 2D OCP is briefly discussed. (© 2016 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Ontogeny of tool use: how do toddlers use hammers?
Authors: Fragaszy Dorothy , Simpson Kathy , Cummins‐Sebree Sarah , Brakke Karen 
Published: April 2016

AbstractHammering with a hand tool appears early in life. Skillful hammering involves accommodating movements to properties of the hammer, orienting the hammer's head to the item to be struck, and maintaining stable posture during forceful action with the arm(s). We aimed to characterize development of these abilities in young children (12, 18, and 24 months old). Children struck at a peg with a hammer held in the hand or a hammer attached to a handle. Children struck more frequently with a hard hammer surface than a soft one, and more frequently (although less accurately) with handled hammers than with non‐handled hammers. Developmental differences were evident in accuracy, number of strikes, and kinematic parameters, especially with the handled object. Children's ability to use objects for forceful and accurate percussion changed measurably over the second year, in tandem with improving postural stability and greater motion of the elbow.
Capturing neutral and adaptive genetic diversity for conservation in a highly structured tree species
Authors: Rodríguez‐Quilón Isabel , Santos‐del‐Blanco Luis , Serra‐Varela María Jesús , Koskela Jarkko , González‐Martínez Santiago C. , Alía Ricardo 
Published: April 2016

AbstractPreserving intraspecific genetic diversity is essential for long‐term forest sustainability in a climate change scenario. Despite that, genetic information is largely neglected in conservation planning, and how conservation units should be defined is still heatedly debated. Here, we use maritime pine (Pinus pinaster Ait.), an outcrossing long‐lived tree with a highly fragmented distribution in the Mediterranean biodiversity hotspot, to prove the importance of accounting for genetic variation, of both neutral molecular markers and quantitative traits, to define useful conservation units. Six gene pools associated to distinct evolutionary histories were identified within the species using 12 microsatellites and 266 single nucleotide polymorphisms (SNPs). In addition, height and survival standing variation, their genetic control, and plasticity were assessed in a multisite clonal common garden experiment (16 544 trees). We found high levels of quantitative genetic differentiation within previously defined neutral gene pools. Subsequent cluster analysis and post hoc trait distribution comparisons allowed us to define 10 genetically homogeneous population groups with high evolutionary potential. They constitute the minimum number of units to be represented in a maritime pine dynamic conservation program. Our results uphold that the identification of conservation units below the species level should account for key neutral and adaptive components of genetic diversity, especially in species with strong population structure and complex evolutionary histories. The environmental zonation approach currently used by the pan‐European genetic conservation strategy for forest trees would be largely improved by gradually integrating molecular and quantitative trait information, as data become available.
Synthesis and Conformational Analysis of Quinoline–Oxazole Peptides
Authors: Kudo Mayumi , Carbajo López Daniel , Maurizot Victor , Masu Hyuma , Tanatani Aya , Huc Ivan 
Published: April 2016

AbstractThe incorporation of flexible aliphatic units into otherwise rigid aromatic foldamer sequences may result in different outcomes. The flexible units may have conformational preferences of their own that can be expressed orthogonally to those of the aromatic units. Alternatively, the latter may dictate their folding behavior onto the former. Hybrid aliphatic–aromatic peptidic oligomers combining oxazole‐based (O) and quinoline‐based (Q) amino acids have been synthesized, and their folding behavior has been investigated in solution by NMR spectroscopy and CD spectroscopy, and in the solid state by X‐ray crystallography. Sequences based on the OQQ repeat motif were shown to fold into a canonical aromatic helix motif dominated by the preferences of the quinoline, whereas sequences based on OQ repetitions preferred to fold into a herringbone helix in which the conformational preference of the oxazole units is also expressed.
SPH modelling of depth‐limited turbulent open channel flows over rough boundaries
Authors: Kazemi Ehsan , Nichols Andrew , Tait Simon , Shao Songdong 
Published: April 2016

SummaryA numerical model based on the smoothed particle hydrodynamics method is developed to simulate depth‐limited turbulent open channel flows over hydraulically rough beds. The 2D Lagrangian form of the Navier–Stokes equations is solved, in which a drag‐based formulation is used based on an effective roughness zone near the bed to account for the roughness effect of bed spheres and an improved sub‐particle‐scale model is applied to account for the effect of turbulence. The sub‐particle‐scale model is constructed based on the mixing‐length assumption rather than the standard Smagorinsky approach to compute the eddy‐viscosity. A robust in/out‐flow boundary technique is also proposed to achieve stable uniform flow conditions at the inlet and outlet boundaries where the flow characteristics are unknown. The model is applied to simulate uniform open channel flows over a rough bed composed of regular spheres and validated by experimental velocity data. To investigate the influence of the bed roughness on different flow conditions, data from 12 experimental tests with different bed slopes and uniform water depths are simulated, and a good agreement has been observed between the model and experimental results of the streamwise velocity and turbulent shear stress. This shows that both the roughness effect and flow turbulence should be addressed in order to simulate the correct mechanisms of turbulent flow over a rough bed boundary and that the presented smoothed particle hydrodynamics model accomplishes this successfully. © 2016 The Authors International Journal for Numerical Methods in Fluids Published by John Wiley & Sons Ltd
Reservoirs are hotspots of nitrogen cycling in peatland catchments
Authors: Edokpa D. A. , Evans M. G. , Rothwell J. J. 
Published: April 2016

AbstractThis study presents input–output budgets of total dissolved nitrogen (TDN), dissolved organic N (DON) and dissolved inorganic N (DIN) for a reservoir in a peatland catchment in the south Pennines (UK). This site receives high levels of atmospheric inorganic N deposition, in the range of 26 kg N ha−1 yr−1. The results show that the reservoir retains ~21 to 31% of the annual TDN input (8806 ± 741 kg N). Approximately 39 to 55% of DON (3782 ± 653 kg N) and 6 to 13% of DIN (5024 ± 349 kg N) were retained/processed. A long water retention time (104 days), average annual pH of 6.5, high concentrations of DIN in the reservoir water and a deep water column suggest that denitrification is potentially a key mechanism of N retention/removal. The results also demonstrate that DON is potentially photodegraded and utilized within the reservoir, particularly during the summer season when 58 to 80% of DON input (682 ± 241 kg N) was retained, and a net export of DIN (~34 kg N) was observed. The findings therefore suggest that DON may play a more crucial role in the biogeochemistry of peat‐dominated acid sensitive upland freshwater systems than previously thought. Reservoirs, impoundments and large lakes in peatland catchments may be important sites in mediating downstream N transport and speciation. Copyright © 2016 John Wiley & Sons, Ltd.