bluuebunny/crossref_metadata_2025_split huggingface dataset:
Pd@TTF Tailored Nanostructured Platform: Voltammetric Estimation of Ceftazidime
Authors: Tiwari Preeti , Azad Uday Pratap , Gupta Sandeep , Prakash Rajiv 
Published: August 2017

AbstractHerein, we report the synthesis of tetrathiafulvalene stabilized palladium nanocomposite (Pd@TTF) through one‐step simple chemical route without using any external reducing agent. Prepared Pd@TTF was further used for the electrochemical determination of ceftazidime (CFZ). A possible interaction mechanism has been proposed for the formation of palladium NPs sandwiched between TTF radical cations (Pd@TTF). As‐prepared Pd@TTF are characterized by using various techniques to investigate its structural, optical, and electrochemical properties The interaction of drug molecules with Pd@TTF is utilized in sensing of the drug using voltammetric techniques. The limit of detection (LOD) of CFZ is achieved up to 0.5 μM. The Pd@TTF modified sensor probe is successfully used for the determination of CFZ in the commercially available CFZ injection.
Color Tunable Donor‐Acceptor Electroluminescent Copolymers: Synthesis, Characterization, Photophysical Properties and PLED Fabrication
Authors: Gopikrishna Peddaboodi , Das Dipjyoti , Iyer Parameswar Krishnan 
Published: August 2017

AbstractA series of novel color tunable donor‐acceptor conjugated copolymers (CPs) are developed from N‐octylcarbazole (Cz‐O) and N‐phenyl‐1,8‐naphthalimide (N‐PN) with a combination of feed ratios of Cz−O and N‐PN (50:50, 65:35, 75:25, 90:10, 95:05 and 99:01). The copolymers exhibit desirable solubility in organic solvents like chlorobenzene, chloroform, THF, etc., color tunability from blue to orange and desired electrochemical properties and are utilized for PLED fabrication. The new CPs are well characterized using NMR, FT‐IR, TGA, DSC, UV‐Vis and PL spectroscopy and their structural and photophysical properties are well correlated. The PL emissions of the CPs are red shifted steadily with increase in the N‐PN content in the CP main chains. PLEDs are fabricated using these newly developed CPs as emissive layer (EML) in ITO/PEDOT:PSS/PCzN‐PN/BCP/LiF/Al configuration. Among all devices, PLEDs using PCzN‐PN05 copolymer as EML is found to give the best device performance with maximum brightness of 309 cd m−2 and 0.451 cd A−1 luminous efficiency.
Charge‐Neutral, Stable, Non‐Cytotoxic, Near‐Infrared SnS Aqueous Quantum Dots for High Signal‐to‐Noise‐Ratio Biomedical Imaging
Authors: Han Song , Shih Wan Y. , Shih Wei‐Heng 
Published: August 2017

AbstractWe have synthesized charge‐neutral, stable, non‐cytotoxic, bright, near‐infrared (NIR) SnS quantum dots (QDs) by first making Cysteamine‐capped SnS QDs in glycerol under acidic conditions followed by lengthening the capping molecule with peptide bonds by reacting the capping molecules with glycine and subsequent heat treatment at 200 °C for 4 hours. The obtained stable SnS QDs exhibited a band gap of 1.5 eV and a strong, narrow NIR emission peak at 830 nm with a quantum yield of 4.6 %. The suspension could be stable for more than 1 month without aggregation or emission decay. The positively charged SnS QDs were further neutralized by 3‐mercaptoproprionic acid (MPA) through electrostatic attraction. The MPA neutralized SnS QDs were shown to be non‐cytotoxic at concentrations 6 times the typical QDs concentration for immunostaining. Low‐noise, optimal NIR immunofluorescent imaging of vascular endothelial growth factor (VEGF) on 3T3 cells and Tn antigen on HT29 cells was achieved by using streptavidin (SA)‐linked MPA‐neutralized SnS QDs with a SA:QD molar ratio of 22:1 to bind to biotinylated secondary antibody bound on the primary antibody that was bound on the targeted antigen on the cell membrane with a high signal‐to noise ratio (SNR) of 35.
′′One‐Pot′′ Selective Synthesis of 3,4‐Disubstituted Pyrroles and Benzo[f]indole‐4,9‐diones from 1,3‐Indanedione, Aromatic Aldehydes and TosMIC
Authors: Aitha Anjaiah , Payili Nagaraju , Rekula Santhosh Reddy , Yennam Satyanarayana , Anireddy Jaya Shree 
Published: August 2017

AbstractA variety of 3,4‐disubstituted pyrroles and benzo[f]indole‐4,9‐diones have been selectively synthesized from readily available aromatic aldehydes, 1,3‐Indanedione and tosylmethyl isocyanide (TosMIC) by a one‐pot procedure in high yields. This methodology features operationally simple, practical with broad substrate scope and usage of easy to handle reagents. The one‐pot sequential reactions proposed to proceeds through a tandem in situ generated chalcones and [3+2]‐cycloaddition/ring cleavage or expansion process.
Antiradical Ability of Dendrimer‐Bridged Hindered Phenol and Its Antioxidant Property in Polyolefin
Authors: Li Cuiqin , Zhai Xue , Guo Suyue , Li Huanyu , Sun Peng , Wang Hua , Wang Jun 
Published: August 2017

AbstractAntiradical abilities of 1.0 generation dendrimer bridged hindered phenols (1.0G dendritic phenols) are studied by the DPPH method and antioxidant properties in polyolefin are evaluated by melt flow rate (MFR), oxidation induction time (OIT) and accelerated thermal aging test. The results indicate that the antioxidant properties are affected not only by the chemical structure but also by the reaction system for series of 1.0G dendritic phenols. The antiradical ability decreases with increasing of the length of the bridged group of 1.0 G dendritic phenols, and the antiradical abilities at steady state reaction time are better than those at fixed reaction time of 30 min. The reaction of 1.0G dendritic phenols scavenging DPPH free radical belongs to slow kinetic behavior. And 1.0G dendritic phenols have excellent processing property, oxidation resistance behavior and thermo‐oxidative aging resistance in linear low density polyethylene (LLDPE) and polypropylene (PP). The OIT values and the aging coefficient values of polyolefin stabilized with 1.0G dendritic phenols increase with increasing of the length of the bridged group of 1.0G dendritic phenols. The antioxidant abilities 1.0G dendritic phenols in LLDPE are superior to those in PP.
One‐step Simultaneous Synthesis of Graphene and Pt Nanoparticles under the Action of Pulsed Alternating Current and Electrochemical Performance of Pt/Graphene Catalysts
Authors: Kuriganova Alexandra B. , Leontyev Igor N. , Avramenko Marina V. , Popov Yuri , Maslova Olga A. , Koval Olga Yu. , Smirnova Nina V. 
Published: August 2017

AbstractPt/graphene electrocatalyst for fuel elements has been obtained via the simultaneously electrochemical dispersion of Pt foil and expanded graphite by applying the alternating current. Raman spectroscopy and transmission electron microscopy (TEM) have revealed multilayered structure of graphene (3‐5 layers) with linear defects of graphene sheets near 1 μm. The microstructural characteristics and catalytic activity of synthesized Pt/graphene catalyst have been compared with those of Pt/Vulcan catalyst prepared under the same conditions. Pt nanoparticles of Pt/Graphene catalyst exhibit smaller average dimensions and narrower particle size distribution. It follows from the electrochemical study that the electrochemical surface area of Pt/graphene catalyst is 2.5 times higher than for Pt/Vulcan. Besides this, the activity in the electrooxidation of methanol and the stability of Pt/graphene catalyst are found to be superior to the analogous parameters of Pt/Vulcan specimen.
Synthesis, Conformational Properties and DFT Computational Studies of Polymethyl‐Substituted [3.3]Metacyclophanes
Authors: Islam Md. Monarul , Akther Thamina , Rahman Shofiur , Georghiou Paris E. , Matsumoto Taisuke , Tanaka Junji , Redshaw Carl , Yamato Takehiko 
Published: August 2017

AbstractPolymethyl substituted [3.3]metacyclophanes (MCPs) 4 a–d, were synthesized by the TosMIC coupling method followed by Wolff–Kishner reduction of the corresponding polymethyl‐substituted [3.3]MCP‐2,11‐diones (3 a–d). 1H NMR spectroscopy reveals that both 5,6,7,14,16‐pentamethyl[3.3]MCP‐2,11‐diones (3 a and 3 b) undergo conformational changes relative to the NMR time scale in solution at room temperature but that the anti conformer is preferred. Reduced 5,6,7,14,16‐pentamethyl[3.3]MCP (4 a and 4 b) adopt fixed syn–conformations in solution at room temperature. X‐ray analysis showed that in the solid state, 5,6,7,14,15,16‐hexamethyl[3.3]MCP‐2,11‐dione 3 a adopts the anti‐conformation and reduced 5,6,7,14,16‐pentamethyl[3.3]MCP‐2,11‐diones 4 b adopts a syn‐(chair‐chair) conformation. A series of electrophilic substitution reactions such as formylation, acetylation and nitration were carried out with 5,6,7,14,16‐pentamethyl[3.3]MCP 4 b to study their conformational isomers. The formyl, acetyl and nitro derivatives of 5,6,7,14,16‐pentamethyl[3.3]MCP are fixed to adopt syn‐conformations in solution at room temperature. The conformational isomers of the metacyclophanes and derivatives obtained from density functional theory (DFT) methods were used to estimate the total energies and energy minimized structures of the different conformations.
Solvothermal Syntheses, Crystal Structures and Catalytic Properties of Four Chiral Compounds Built from (R)‐4‐(4‐(1‐Carboxyethoxy)penoxy) Benzoic Acids
Authors: Li Xue‐Wei , Zhang Han‐Zhong , Hou Guang‐Feng , Xu Xin , Yu Ying‐Hui , Gao Jin‐Sheng 
Published: August 2017

AbstractA series of chiral metal−organic compounds [Ag(cpfa)(phen)] (1), [Ag(cpna)(phen)] (2), [Cu(cpna)(phen)]•2H2O (3), [Cd2(cpna)2(phen)2]n (4) (H2cpfa=(R)‐4‐(4‐(1‐carboxyethoxyphenoxy)phenoxy‐3‐fluorobenzoic acid; H2cpna=(R)‐4‐(4‐(1‐carboxyethoxy)phenoxy)‐3‐nitrobenzoic acid; phen=1,10‐phenanthroline) has been successfully obtained via solvothermal reactions and characterized by IR spectra, elemental analyses, thermo gravimetric analyzer (TGA), solid‐state circular dichroism (CD) and powder X‐ray diffraction (PXRD). Compounds 1–4 all crystallize in chiral space groups and their CD spectra exhibit obvious positive or negative Cotton effects, indicating their homochirality. Rich hydrogen bonds based on carboxylic groups and π‐π interactions between adjacent phen molecules are present in the four compounds. It is also found that the pH value and reactant ratio have an impact on the growth of the compounds. In addition, their asymmetric catalytic activities for Henry reaction have also been investigated.
Palladium(II)‐Porphyrin Complexes as Efficient and Eco‐Friendly Catalysts for Mizoroki‐Heck Coupling
Authors: Rao Kanusu Umamaheswara , Lakshmidevi Jangam , Appa Rama Moorthy , Prasad Sana Siva , Narasimhulu Manchala , Vijitha Raagala , Rao Kummari Subba Venkata Krishna , Venkateswarlu Katta 
Published: August 2017

AbstractA facile palladium(II)‐porphyrin catalytic system has been developed for the Mizoroki‐Heck coupling of aryl bromides with alkyl acrylates under mild conditions. Seven different porphyrins (H2TPP, H2TpCPP, H2TpAP, H2TpTP, H2TSTpSPP, H2TmHPP and H2TmCPP) and their complexes with palladium (Pd‐TPP, Pd‐TpCPP, Pd‐TpAP, Pd‐TpTP, Pd‐TSTpSPP, Pd‐TmHPP and Pd‐TmCPP) were synthesized, and examined their catalytic role in the synthesis of alkyl cinnamates in DMF. The complex, Pd‐TSTpSPP showed better activity in the present conversion. This finding has significant advantages like operational simplicity, easy synthesis of porphyrin ligands and their complexes with palladium, utilization of safer and recyclable catalyst and high yields of Mizoroki‐Heck products.
Lemon Essential Oil of Variable Composition by Changing the Conditions of the Extraction from Lemon Peel via Microwave Hydrodiffusion and Gravity
Authors: Ciriminna Rosaria , Fidalgo Alexandra M. , Carnaroglio Diego , Tamburino Alfredo , Cravotto Giancarlo , Ilharco Laura M. , Pagliaro Mario 
Published: August 2017

AbstractMicrowave hydrodiffusion and gravity extraction of waste lemon peel carried out on semi industrial scale, enabled not only to extract high quality essential oil via an entirely green process, but also to selectively adjust the oil composition by varying the hydrodiffusion time.
Molecular Weight Estimation of Molecules Incorporating Heavier Elements from van‐der‐Waals Corrected ECC‐DOSY
Authors: Kreyenschmidt Anne‐Kathrin , Bachmann Sebastian , Niklas Thomas , Stalke Dietmar 
Published: August 2017

AbstractAggregate formation of organometallic compounds can be straightforwardly observed and interpreted through DOSY molecular weight (MW) estimation. Recently, the power‐law approach and preparation of external calibration curves (ECCs) has propelled the applicability of this DOSY MW estimation. However, effective prediction of MWs of molecules containing heavier elements (e. g. halogenated compounds) has not been sufficiently accounted for. Hence, we introduce specialized ECCs for various halogenated molecules. In an innovative attempt we propose a correction factor for standard ECCs that scales with molecular features to extend considerably the range of molecules that can be investigated by ECC‐DOSY.
Synthesis, Structure and Chemistry of Mono‐ and Digallane Complexes Supported by N,O‐Ketimine Ligand
Authors: Bakthavachalam Kirubakaran , Yuvaraj Kuppusamy , Raghavendra Beesam , Dorcet Vincent , Roisnel Thierry , Rit Arnab , Ghosh Sundargopal 
Published: August 2017

AbstractA series of N,O‐ketimine supported gallium and digallane complexes have been synthesized and structurally characterized. The mono(ketiminate) gallium dichloride [OCMeCHCMeN(Dipp)]GaCl2, 2 (Dipp=2,6‐iPr2C6H3) and bis(ketiminate) gallium chloride [OCMeCHCMeN(Dipp)]2GaCl, 3 were isolated from the reaction of GaCl3 with 1 and 2 equivalents of lithiated ketimine, [OCMeCHCMeN(Dipp)]Li, 1 respectively. Treatment of 1 with ‘‘GaI’’ yielded diiodobis(ketiminate) digallane complex [OCMeCHCMeN‐(Dipp)]2Ga2I2, 4. To the best of our knowledge, compound 4 is the first report on N,O‐ketiminate ligand supported stable heteroleptic digallane(II) complex. The frontier molecular orbital analysis and a high Wiberg Bond Index (WBI) values support the strong interaction between the gallium centers in 4. In an attempt to synthesize alkyl substituted Ga complexes, we carried out the reaction of ketimine ligand with GatBu2Cl (1:1 ratio) that generated the adduct [OCMeCHCMeN(H)(Dipp)]GatBu2Cl, 5. In a similar fashion, dialkyl gallium complex [OCMeCHCMeN(Dipp)]GatBu2, 6 was obtained from the reaction of 1 with GatBu2Cl. All the compounds have been charecterized by 1H, 13C NMR and mass spectroscopy. The molecular structures of complexes 2–5 have also been determined by single crystal X‐ray diffraction analysis.
Electrospun Mesoporous Composite CuO−Co3O4/N‐ TiO2 Nanofibers as Efficient Visible Light Photocatalysts
Authors: Pradhan Amaresh C. , Senthamizhan Anitha , Uyar Tamer 
Published: August 2017

AbstractOne‐dimensional mesoporous composite CuO−Co3O4 /N‐TiO2 nanofibers (CuCoNT NFs) have been fabricated by in situ sol−gel electrospinning technique. In our approach, both polyvinylpyrrolidone (PVP) and polyethylene glycol (PEG) are used as dual polymeric carrier matrix for the fabrication of electrospun CuCoNT NFs. PVP chains assist the electrospinning of the uniform composite nanofibers whereas PEG is responsible for mesoporosity which is confirmed by N2 sorption analyses. Along with CuCoNT NFs, other nanofiber samples (TiO2 NFs, N‐TiO2 NFs, CuO/N‐TiO2 NFs, Co3O4/N‐TiO2 NFs) have also been fabricated for comparative studies. The morphology and composition of the NFs have been confirmed by the HR‐TEM and XPS analyses. The red shifting of band gap energy from anatase TiO2 NFs to composite CuCoNT NFs (1.57 eV) is suggesting formation of visible light response. Oxygen vacancies in CuCoNT NFs, leads to lowering the e− − h+ recombination. The lowering of photoluminescence spectrum and high photocurrent response in CuCoNT NFs makes CuO as low cost cocatalyst. The composite CuCoNT NFs is treated as an efficient photocatalyst for swift degradation of mixed dyes in visible light, an exemplary move. Exactly, 100% mixed dyes (30 mg/L) degradation is achieved at pH 10 in just 60 minutes.
Concise Review: Mechanisms of Quiescent Hair Follicle Stem Cell Regulation
Authors: Yi Rui 
Published: August 2017

Abstract
Maintaining a pool of adult stem cells is essential for tissue homeostasis and wound repair. In mammalian tissues, notably hair follicles, blood, and muscle, stem cells acquire quiescence and infrequently divide for self-renewal. Mechanistic understanding of stem cell quiescence is critical for applying these multipotent cells in regenerative medicine and interrogating their roles in human diseases such as cancer. Quiescent and dividing epithelial stem cells located in hair follicle are conspicuously organized in a spatiotemporally specific manner, allowing them to be studied at a considerable depth. Recent advancements in mouse genetics, genomics, and imaging have revealed unprecedented insights into establishment, maintenance, and regulation of quiescent hair follicle stem cells. This concise review summarizes the progress with a focus on mechanisms mediated by signaling pathways and transcription factors and discusses their implications in the understanding of stem cell biology.
Terrestrial diatoms as tracers in catchment hydrology: a review
Authors: Pfister Laurent , Wetzel Carlos E. , Klaus Julian , Martínez‐Carreras Núria , Antonelli Marta , Teuling Adriaan J. , McDonnell Jeffrey J. 
Published: August 2017

Diatoms are remarkable organisms. They are present in almost all habitats containing water (e.g., lakes, streams, soils, bark) and rank among the most common algal groups in both freshwaters and marine ecosystems. The ubiquitous character of aquatic diatoms has triggered countless applications as environmental tracers for studies in water quality, paleoclimate reconstruction and sediment tracing. However, diatoms also occur in the terrestrial environment. It is this plethora of diatom life‐forms that has recently triggered interest in their use as tracers of hydrological processes. The use of diatoms in catchment hydrology has been very limited. Part of the reason is that until recently, the taxonomy and ecology of terrestrial diatom assemblages were largely unknown. However, in the past decade, much work has been done to quantify terrestrial diatom reservoir size, dynamics, and potential depletion following precipitation events. Therefore, such terrestrial diatoms now hold promise for use in catchment hydrology—for tracing runoff flow sources and pathways across a wide range of spatial scales. Here we review the literature on terrestrial diatoms and describe the various sampling protocols that have been designed and tested for specific applications in hydrological processes research. We review and summarize the work on terrestrial diatom reservoir characterization, transport mechanisms and pathways to show how such diatom‐based tracer work might be possible at the catchment scale for rainfall‐runoff studies. Finally, we present a vision for future work that might take advantage of terrestrial diatoms in catchment hydrology and discuss the main challenges going forward. WIREs Water 2017, 4:e1241. doi: 10.1002/wat2.1241This article is categorized under:

Science of Water > Hydrological Processes
Science of Water > Methods
Fish Oil Finishing Diet Maintains Optimal n‐3 Long‐Chain Fatty Acid Content in European Whitefish (Coregonus lavaretus)
Authors: Suomela Jukka‐Pekka , Tarvainen Marko , Kallio Heikki , Airaksinen Susanna 
Published: August 2017

AbstractThis study examined the effect of substituting vegetable oil for fish oil in feed, with subsequent re‐introduction of fish oil‐rich feed (finishing feeding) in late stages of growth, on the fatty acids of cultivated European whitefish (Coregonus lavaretus). Restorative finishing feeding with fish oil‐rich feed for 15 and 25 weeks was sufficient to change the total content of nutritionally valuable long‐chain n‐3 fatty acids, eicosapentaenoic acid (20:5n‐3) and docosahexaenoic acid (22:6n‐3), to correspond to that of fish fed the fish oil‐rich feed throughout their lifespan. Under natural conditions, 15 and 25 weeks correspond to weight gains of 75% and 100% (i.e. doubling), respectively. Also, the fatty acid profile of the fish was restored after finishing periods of 15 and 25 weeks. Limiting the use of fish oil by lowering the overall fat content of the feed (no vegetable oil added) resulted in a decrease in the long‐chain n‐3 fatty acids. Based on the results, after receiving a vegetable oil‐rich diet, restorative fish oil‐rich feeding in the last stages of growth in European whitefish is nutritionally justified in order to balance nutritional gain for consumers with sustainable use of finite marine oils. The results encourage commercial efforts to further utilize and optimize finishing feeding practices.
Developing sustainable research careers for KL2 scholars: The importance of an inclusive environment and mentorship
Authors: Byington Carrie L. , Rothwell Erin , Matheson Trent , Childs Rebecca , Wachs Erin , Rocha Ruben , Murtaugh Maureen , Turok David , Letsou Anthea , Shakib Julie , Hess Rachel , Dere Willard 
Published: August 2017

IntroductionThe National Clinical and Translational Science Award (CTSA) Consortium 2.0 has developed common metrics as a collaborative project for all participating sites. Metrics address several important aspects and functions of the consortium, including workforce development. The first workforce development metrics to be proposed for all CTSA hubs include the proportion of CTSA-supported trainees and scholars with sustainable careers in translational research and the diversity and inclusiveness of programs.Methods and resultsThe University of Utah Center for Clinical and Translational Science (CCTS), a CTSA hub, has been actively engaged in mentoring translational scientists for the last decade. We have developed programs, processes, and institutional policies that support translational scientists, which have resulted in 100% of our KL2 scholars remaining engaged in translational science and in increasing the inclusion of individuals under-represented in medicine in our research enterprise. In this paper, we share details of our program and what we believe are evidence-based best practices for developing sustainable translational research careers for all aspiring junior faculty members.ConclusionsThe University of Utah Center for Clinical and Translational Science has been integral in catalyzing interactions across the campus to reverse the negative trends seen nationally in sustaining clinician scientists. Our programs and processes can serve as a model for other institutions seeking to develop translational scientists.
Paleodietary Analysis of Humans in Guanzhong Basin, Shaanxi Province Since 8000 BP
Authors: Cheng Peng , Zhou Weijian , Gong Wei , Zhu YiZhi , Yang Yachang , Burr G S , Du Hua 
Published: August 2017

AbstractWe identified human paleodietary changes from inhabitants of the Guanzhong basin since 8000 BP, based on published carbon and nitrogen isotopic measurements on bones, fauna and plant remains. We also directly measured 14C ages, δ13C and δ15N values from bones unearthed at the Zhouyuan site, west of Guanzhong, in order to reconstruct paleodietary changes of the ancient inhabitants. We found that during the Laoguantai period, animal foods were the main source of nourishment with supplementary plant-derived foods. After this period, plant-derived foods became the main food source, with supplementary animal sources. The development of dry farming led to increased consumption of foxtail millet and broomcorn millet. This trend persisted and marked a fundamental shift from hunting, gathering, and fishing to farming and animal domestication. The dietary trends of the ancient inhabitants also show pronounced regional differences through time. The use of domestic animals was proportionally higher in the eastern part of the Guanzhong region, while wild animals were more common in the west.