bluuebunny/crossref_metadata_2025_split huggingface dataset:
ChemInform Abstract: An Efficient Ligand‐Free Ferric Chloride Catalyzed Synthesis of Annulated 1,4‐Thiazine‐3‐one Derivatives.
Authors: Majumdar K. C. , Ghosh Debankan 
Published: October 2014

AbstractThe FeCl3‐catalyzed reaction of 2‐chloro‐N‐methylacetamide derivatives with sodium sulfide provides an easy access to a variety of annulated 1,4‐thiazin‐3‐ones.
ChemInform Abstract: Asymmetric Synthesis of Protected α‐Amino Boronic Acid Derivatives with an Air‐and Moisture‐Stable Cu(II) Catalyst.
Authors: Buesking Andrew W. , Bacauanu Vlad , Cai Irene , Ellman Jonathan A. 
Published: October 2014

AbstractThe enantioselective synthesis of the title compounds from aldimines uses a low catalyst loading.
ChemInform Abstract: Cs2CO3‐Promoted One‐Pot Synthesis of Alkynylphosphonates, ‐phosphinates, and ‐phosphine Oxides.
Authors: Wang Yulei , Gan Jiepeng , Liu Liu , Yuan Hang , Gao Yuxing , Liu Yan , Zhao Yufen 
Published: October 2014

AbstractThe preparation of the title compound classes from readily available 1,1‐dibromo‐1‐alkenes is presented in an operational simple process without transition‐metal containing promoters.
ChemInform Abstract: Hypervalent Iodine Mediated Synthesis of C‐2 Deoxy Glycosides and Amino Acid Glycoconjugates.
Authors: Islam Maidul , Tirukoti Nishanth D. , Nandi Shyamapada , Hotha Srinivas 
Published: October 2014

AbstractThe synthesis of amino acid glycoconjugates (VI) is achieved by the synthesis of C‐2 deoxy glycosides (III) and a subsequent intramolecularly aglycon delivery (V) followed by a dehalogenation reaction.
ChemInform Abstract: Band Excitation in Scanning Probe Microscopy: Recognition and Functional Imaging
Authors: Jesse S. , Vasudevan R. K. , Collins L. , Strelcov E. , Okatan M. B. , Belianinov A. , Baddorf A. P. , Proksch R. , Kalinin S. V. 
Published: October 2014

AbstractReview: 97 refs.
Regio‐ and Enantioselective Friedel–Crafts Reactions of Indoles to Epoxides Catalyzed by Graphene Oxide: A Green Approach
Authors: Acocella Maria Rosaria , Mauro Marco , Guerra Gaetano 
Published: October 2014

AbstractGraphene oxide efficiently promotes high regio‐ and enantioselective ring opening reactions of aromatic epoxides by indoles addition, in solvent‐ and metal‐free conditions. The Friedel–Crafts products were obtained with enantioselectivity up to 99 % ee. The complete inversion of stereochemistry indicates the occurrence of SN2‐type reaction, which assures high level of enantioselectivity.
Silanediol‐Catalyzed Carbon Dioxide Fixation
Authors: Hardman‐Baldwin Andrea M. , Mattson Anita E. 
Published: October 2014

AbstractCarbon dioxide is an abundant and renewable C1 source. However, mild transformations with carbon dioxide at atmospheric pressure are difficult to accomplish. Silanediols have been discovered to operate as effective hydrogen‐bond donor organocatalysts for the atom‐efficient conversion of epoxides to cyclic carbonates under environmentally friendly conditions. The reaction system is tolerant of a variety of epoxides and the desired cyclic carbonates are isolated in excellent yields.
The Ugi–Smiles and Passerini–Smiles Couplings: A Story About Phenols in Isocyanide‐Based Multicomponent Reactions
Authors: El Kaïm Laurent , Grimaud Laurence 
Published: October 2014

AbstractThe Ugi–Smiles and Passerini–Smiles couplings are extensions of Ugi and Passerini reactions involving the use of acidic phenols in place of the traditional carboxylic acid partners. A Smiles rearrangement is in each case responsible for the final N‐aryl carboxamide formation. All the available data on the mechanisms and the scope of these reactions are presented. To demonstrate the interest of Ugi–Smiles and Passerini–Smiles couplings, these reactions have been further applied to the preparation of various fused heterocyclic systems. These “post‐condensation” studies are also covered in this review.
Transformation of Glycals into α,β,γ,δ‐Conjugated Chirons under Metal‐Free Conditions
Authors: Madhubabu Tatina , Yousuf Syed Khalid , Kusunuru Anil Kumar , Mukherjee Debaraj 
Published: October 2014

AbstractA diastereoselective, metal‐free, one‐pot domino synthetic strategy was developed for the transformation of glycals into new chiral scaffolds. Optimization of the reaction conditions to exclude normal Ferrier products, characterization of the new entities, and a plausible mechanism were investigated.
An Improved Protocol for the Synthesis of α‐Trifluoromethylthio‐Substituted Ketones by Copper‐Mediated Trifluoromethylthiolation of α‐Bromo Ketones
Authors: Huang Yangjie , He Xing , Li Haohong , Weng Zhiqiang 
Published: October 2014

AbstractAn efficient and practical approach to α‐trifluoromethylthio‐substituted ketones was developed. The trifluoromethylthiolation of (bpy)Cu(SCF3) (bpy = 2,2′‐bipyridyl) with various α‐bromo ketones afforded the desired α‐trifluoromethylthio‐substituted ketones in good yields. The reaction tolerates more functionally than previously reported methods and demonstrates efficient scalability and practicality.
The impact of pro‐glacial lakes on downstream sediment delivery in Norway
Authors: Bogen Jim , Xu Mengzhen , Kennie Patricia 
Published: October 2014

AbstractGlacier recessions caused by climate change may uncover pro‐glacial lakes that form important sedimentation basins regulating the downstream sediment delivery. The impact of modern pro‐glacial lakes on fluvial sediment transport from three different Norwegian glaciers: Nigardsbreen, Engabreen and Tunsbergdalsbreen, and their long‐term development has been studied. All of these lakes developed in modern times in overdeepened bedrock basins.The recession of Nigardsbreen uncovered a 1.8 km long and on average 15 m deep pro‐glacial lake basin during 1937 to 1968. Since then the glacier front has been situated entirely on land, and the sediment input and output of the lake has been measured. The suspended sediment transport into and out of the lake averaged 11 730 t yr−1 and 2340 t yr−1 respectively. Thus, 20% remained in suspension at the outlet. The measured mean annual bedload supplied to the lake was 11 800 t yr−1, giving a total transport of 23 530 t yr−1 which corresponds to a specific sediment yield of 561 t km−2 yr−1.A 1.9 km long and up to 90 m deep pro‐glacial lake basin downstream from Engabreen glacier was uncovered during 1890 to 1944. The average suspended sediment load delivered from the glacier during the years 1970–1981 amounted to 12 375 t yr−1and the transport out of the lake was 2021 t yr−1, giving an average of 16% remaining in suspension. The mean annual bedload was 8000 t yr−1, thus the total transport was 20 375 t yr−1, giving a specific sediment yield of 566 t km−2 yr−1.For Tunsbergdalsbreen glacier, measurements in the early 1970s indicated that the suspended sediment transport was on average 44 000 t yr−1. From 1987 to 1993 the recession of the glacier uncovered a small pro‐glacial lake, 0.3 km long and around 9 m deep. Downstream from this, the suspended sediment load measured in 2009 was 28 000 t yr−1, indicating that as much as 64% remained in suspension. Flow velocity, grain size of sediment, and morphology of the lake are important factors controlling the sedimentation rate in the pro‐glacial lakes. A survey of the sub‐glacial morphology of Tunsbergdalsbreen revealed that there are several overdeepened basins beneath the glacier. The largest is 4 km long and 100 m deep. When the glacier melts back they will become lakes and act as sedimentation basins. Despite an expected increase in sediment yield from the glacier, little sediment will pass these lakes and downstream sediment delivery will be reduced markedly. Beneath Nigardsbreen there was only a small depression that may form a lake and the sediment delivery will not be significantly affected. © 2014 The Authors. Earth Surface Processes and Landforms published by John Wiley & Sons Ltd.
Slip Length Measurements Using µPIV and TIRF‐Based Velocimetry
Authors: Li Zhenzhen , D'eramo Loic , Monti Fabrice , Vayssade Anne‐Laure , Chollet Benjamin , Bresson Bruno , Tran Yvette , Cloitre Michel , Tabeling Patrick 
Published: October 2014

AbstractThe goal of this paper is to review progress (mostly recent) made in micro and nanovelocimetry, focusing on two techniques: µPIV (microparticle image velocimetry) and nanoPTV (nanoparticle tracking velocimetry). The paper focuses on the measurement of slippage (taken as a benchmark for these techniques), concentrating on work done in our group. We review the developments of µPIV that led, in the last ten years, to the achievement of 100 nm accuracy in the measurement of slip lengths. Later, this approach was complemented by nanoPTV, which recently obtained ±5 nm precision. Here, we also mention recent application of these techniques toward better characterization of microgel and polymer flows. As a whole, the two techniques have conveyed valuable information on flow behavior within and close to the boundaries of microchannels, on the importance of wetting, and on the role of surface heterogeneities. µPIV is commercially available but nanoPTV is not mature. Interesting instrumental developments are expected in the future for the latter technique.
Validity and Efficacy of Screening Algorithms for Assessing Deep Brain Stimulation Candidacy in Parkinson's Disease
Authors: Coleman Robert R. , Kotagal Vikas , Patil Parag G. , Chou Kelvin L. 
Published: October 2014

AbstractDBS for Parkinson's disease (PD) may be underutilized because of limited access to care (most DBS surgeries are performed at specialized centers) or over‐referral of poor candidates, leading to inequitable utilization of limited evaluative resources. There is a pressing need for a widely employable screening algorithm to aid in the evaluation of PD candidates for DBS. The aim of this study was to compare the validity and efficacy of two published screening algorithms, the Florida Surgical Questionnaire for PD and Stimulus, to predict candidacy for DBS. We reviewed the clinical data at our DBS center for 147 consecutive PD DBS referrals between 1 September 2007 and 31 December 2011. Florida Surgical Questionnaire and Stimulus scores were applied retrospectively through a chart review of the movement disorder neurologist's initial clinical evaluation. The validity and accuracy of these two algorithms in predicting candidacy for DBS was compared to the decision to offer DBS surgery by our multidisciplinary DBS team. Of the 130 consecutive PD referrals who presented for initial evaluation, 50 were offered DBS after a standardized multidisciplinary evaluation. The Stimulus scale was a superior screening tool for predicting PD DBS candidacy in these referrals (area under the receiver operating curve [AUROC] = 0.8088), compared to the Florida Surgical Questionnaire for PD (AUROC = 0.6285). In this single‐center study, Stimulus was a more appropriate screening measure than the Florida Surgical Questionnaire for PD to assess DBS candidacy for PD.
Monitoring of River Contamination Derived From Acid Mine Drainage Using Airborne Imaging Spectroscopy (HyMap Data, South‐West Spain)
Authors: Buzzi J. , Riaza A. , García‐Meléndez E. , Carrère V. , Holzwarth S. 
Published: October 2014

AbstractImaging spectroscopy is used in this work as an essential mapping tool to monitor changes in contaminated river sediments. Multidate hyperspectral image data (HyMap) are utilized to identify spatial mineral patterns, to detect temporal changes in mineralogy and to link these changes with geochemical processes and short‐term climate characteristics.River sediments contaminated by acid mine drainage are covered by crusts with variably hydrated iron sulphate. The mineralogy of the crusts and the grain size of the underlying fluvial sediments overlap. The spectra used to build up maps from HyMap data are diagnosed mineralogically with archive spectral libraries from pyrite oxidation minerals from well‐known sequences of minerals.The maps compiled from hyperspectral imagery display generalized oxidation shown by the coatings over river sediments following warm and dry periods with low water level. After the wet periods, the area covered by oxidized mineralogical phases recedes in favour of hydrated sulphate.The iteration of image processing algorithms and the mineralogical and potential contamination in a geological context are described. Change detection of the mineral crusts on the river sediments by mapping using hyperspectral remote sensing data may thus enable a quantitative and qualitative environmental evaluation by the regulators. Copyright © 2014 John Wiley & Sons, Ltd.
Ecosystem Management Along Ephemeral Rivers: Trading Off Socio‐Economic Water Supply and Vegetation Conservation under Flood Regime Uncertainty
Authors: Arnold S. , Attinger S. , Frank K. , Baxter P. , Possingham H. , Hildebrandt A. 
Published: October 2014

AbstractIn ecosystems driven by water availability, plant community dynamics depend on complex interactions between vegetation, hydrology, and human water resources use. Along ephemeral rivers—where water availability is erratic—vegetation and people are particularly vulnerable to changes in each other's water use. Sensible management requires that water supply be maintained for people, while preserving ecosystem health. Meeting such requirements is challenging because of the unpredictable water availability. We applied information gap decision theory to an ecohydrological system model of the Kuiseb River environment in Namibia. Our aim was to identify the robustness of ecosystem and water management strategies to uncertainties in future flood regimes along ephemeral rivers. We evaluated the trade‐offs between alternative performance criteria and their robustness to uncertainty to account for both (i) human demands for water supply and (ii) reducing the risk of species extinction caused by water mining. Increasing uncertainty of flood regime parameters reduced the performance under both objectives. Remarkably, the ecological objective (species coexistence) was more sensitive to uncertainty than the water supply objective. However, within each objective, the relative performance of different management strategies was insensitive to uncertainty. The ‘best’ management strategy was one that is tuned to the competitive species interactions in the Kuiseb environment. It regulates the biomass of the strongest competitor and, thus, at the same time decreases transpiration, thereby increasing groundwater storage and reducing pressure on less dominant species. This robust mutually acceptable strategy enables species persistence without markedly reducing the water supply for humans. This study emphasises the utility of ecohydrological models for resource management of water‐controlled ecosystems. Although trade‐offs were identified between alternative performance criteria and their robustness to uncertain future flood regimes, management strategies were identified that help to secure an ecologically sustainable water supply. Copyright © 2014 John Wiley & Sons, Ltd.
Eco‐friendly Trifoliate Stable Energetic Zinc Nitrate Co­ordination Compounds: Synthesis, Structures, Thermal and Explosive Properties
Authors: Tong Wen‐Chao , Liu Jian‐Chao , Wang Qian‐You , Yang Li , Zhang Tong‐Lai 
Published: October 2014

AbstractThree trifoliate environmental friendly coordination compounds, [Zn(SCZ)3](NO3)2 (1) (SCZ = semicarbazide), [Zn(CHZ)3](NO3)2 (2) (CHZ = carbohydrazide), and [Zn(MCZ)3](NO3)2·H2O (3) (MCZ = methyl carbazate), were synthesized by the reaction of zinc nitrate with its corresponding ligands. The products were characterized by elemental analysis and FT‐IR spectroscopy. Furthermore, compound 1 and 2 were characterized by X‐ray single crystal diffraction. The crystal structures of both 1 and 2 belong to the monoclinic P21/c space group. Remarkably, in all the three compounds, the central zinc cations are six‐coordinated with three oxygen atoms of carbonyl groups and three terminal nitrogen atoms of the hydrazine groups from three SCZ / CHZ / MCZ molecules, which can form three five‐member (Zn–O–C–N–N) rings and exhibit a distorted octahedron. Thermal stabilities of 1 to 3 were studied by differential scanning calorimetry (DSC) and showed that they are all thermostable. The non‐isothermal kinetics parameters were calculated by the Kissinger's method and Ozawa's method, respectively. The energies of combustion, enthalpies of formation, critical temperature of thermal explosion, entropies of activation (ΔS≠), enthalpies of activation (ΔH≠), and free energies of activation (ΔG≠) were measured and calculated. Sensitivity tests revealed that 1–3 are insensitive to mechanical stimuli. The studies of all these three zinc compounds showed that they have potential applications as heat‐stable insensitive energetic materials, especially the semicarbazide coordination compound 1, which has higher crystal density.
Synthesis and Characterization of the Ternary Telluroargentate K4[Ag18Te11]
Authors: Davaasuren Bambar , Dashjav Enkhtsetseg , Rothenberger Alexander 
Published: October 2014

AbstractThe ternary potassium telluroargentate(I), K4[Ag18Te11], was prepared by solvothermal synthesis in ethylenediamine at 160 °C. It crystallizes in the cubic space group Fm$\bar{3}$m (no. 225) with the cell parameter a = 18.6589(6) Å. The crystal structure can be described as a [Ag18Te11]4– three‐dimensional anionic framework with the voids accommodating potassium cations. Chemical bonding analysis reveals polar covalent Ag–Te bonds and considerable Ag–Ag interactions, which support the complex anionic character of the structure. The compound is thermally stable up to 450 °C in an inert atmosphere.
Living Supramolecular Compounds: Influence of Multiple Hydrogen Bond Connection on Molecular Configuration of Monophosphate or Pyrophosphate Thiamine with Anions or Coordination Anions
Authors: Zhang Xiao Xi , Zhang Rui , Sun Qiao , Wei Si Yue , Xu Xue Ting , Wang Ji Xiao , Bai Feng Ying , Xing Yong Heng 
Published: October 2014

AbstractThree supramolecular compounds with monophosphate or pyrophosphate esters of thiamine, namely, [TPPH+·CF3SO3·H2O] (1), [TMPH+·(CdCl4)0.5·2H2O] (2), and [TMPH+·NO3·2.5H2O] (3) (TPP = thiamine pyrophosphate, TMP = thiamine monophosphate) were synthesized in methanol or water systems at room temperature. They were characterized by elemental analysis, IR spectrocopy, and single X‐ray diffraction. Structural analysis shows that they are all supramolecular compounds and there are abundant interhydrogen and intrahydrogen bonds in the molecules. In addition, combined with the quantum mechanical calculations, their potential reaction activity and molecular electronic configuration were discussed.
Four pH‐Dependent 1D CoII/NiII Coordination Polymers Based on a Terphenyl‐2,2′,4,4′‐Tetracarboxylic Acid: Syntheses, Structures, and Magnetic Properties
Authors: Xia Wei , Zhao Jun , Wang Ye‐Nan , Guo Sha‐Sha , Tang Ping 
Published: October 2014

AbstractFour CoII/NiII coordination polymers, namely, [M(H3L)2(H2O)2]n (1, 2) and [M(H2L)(H2O)3]n (3, 4), (M = Co for 1 and 3, M = Ni for 2 and 4, H4L = terphenyl‐2,2′,4,4′‐tetracarboxylic acid) were synthesized through hydrothermal reactions at different pH values and structurally characterized. Single crystal X‐ray crystallographic analysis reveals that compounds 1 and 2 are isostructural and exhibit a 1D [M2(H3L)2]n loop‐like infinite chain, whereas compounds 3 and 4 are also isostructural and show a 1D pendant H2L attached [M(H2O)]n chain motif. Additionally, variable‐temperature magnetic susceptibility measurement shows weak antiferromagnetic coupling among the adjacent central CoII atoms in 1 and 3.
Thematic Integration of Spatial Data Sets to Delineate Favourable Zones for Uranium Exploration in Gangpur Basin and Parts of Kunjar and Darjing Basins, Odisha
Authors: Chaturvedi A. K. , Sridhar M. , Murlidharan R. , Shrivastava K. , Guru R. Pavan 
Published: October 2014

Abstract
Surface exploration techniques have been key contributors in discovering mineral deposits over the past three decades. However, in the last decade there has been a growing emphasis on integrating remote sensing, geological, geophysical and geochemical exploration techniques to compliment them in identifying concealed deposits. Successful integrated exploration requires putting mappable petrophysical property contrasts in terms of geological and geochemical process that could be associated with different mineralisation environment. The Precambrian Gangpur basin comprising volcanic free sedimentary sequence is considered as a potential geological setting for hosting uranium mineralisation. The Gangpur basin with metasediments of low to medium metamorphic grade classified as the Gangpur Group are known for hosting manganese, limestone and lead-zinc deposits. Uranium mineralization is reported in limonitic carbonaceous phyllite and sheared quartzite of Kumarmunda Formation at Jhamankele-Bhalulata areas. Several uranium anomalies have been associated with gossan at Kaedarpani, Jamdra and in ferruginised laterite at Badekachar, Jarmal, Jhagarpur, Kadorpani, Karamabahal, Tetelkela & Kumtinunda.
In the present study geological, geophysical and remote sensing data sets are processed and integrated with other available data to delineate target zones for uranium exploration. Even though direct detection of uranium mineralisation remains unresolved in exploration strategy, instead it is becoming increasingly instructive to focus on mapping suitable depositional environments. The enhanced satellite imagery is interpreted in terms of thematic layers viz. trend lines, lineaments, faults and geological contacts. The aeromagnetic data is processed and interpreted thematic layers of magnetic breaks and linears from total magnetic intensity (TMI), the reduced to pole (RTP), tilt derivative and amplitude of analytical signal grid images. The radiometric data is processed based on their broad lithology and radio-elemental distribution maps viz. count maps, ratio maps, ternary (%K-eTh-eU) and eU/K – eU/eTh – eU images are generated to aid in mapping uranium favourability zones. The favourability image zones with high eU/K, eU/eTh and eU counts zones are classified into class based on statistics and anomalous high zones are picked up as uranium favourable locales. The thematic layers of geological contacts, lineaments and faults interpreted from satellite imagery, magnetic linears interpreted from aeromagnetic data and uranium favourability zone extracted from Airborne Gamma Ray Spectrometric (AGRS) data are overlaid. Based on spatial association of favourable features few locals are delineated for uranium exploration.
Neoproterozoic Age Based on Microbiotas from the Raipur Group of Baradwar Sub-basin, Chhattisgarh
Authors: Babu Rupendra , Singh Veeru Kant , Mehrotra Naresh Chandra 
Published: October 2014

Abstract:
An assemblage of structurally preserved organic-walled microfossils (OWMs) from the macerated residue of black carbonaceous shale belonging to Saradih Formation, the youngest carbonate horizon of the Raipur Group, Chhattisgarh Supergroup exposed at on the right bank of Mahanadi River, NE of Sarangarh township in Raigarh district, Chhattisgarh is being reported for the first time. The assemblage is comprised of 19 taxa of 13 genera belong to eukaryotes and prokaryotes viz. Leiosphaeridia, Stictosphaeridium, Dictyotidium, Synsphaeridium, Symplassosphaeridium, Satka, Trachysphaeridium, Goniosphaeridium, Trachyhystrichosphaera, Vandalosphaeridium, Siphonophycus, Oscillatoriopsis and Polythrichoides. The comprehensive account of recovered microbiotic assemblage can be correlated with globally known Neoproterozoic (early Cryogenian) assemblages, deposited in tidal complexes of shallow sea.