bluuebunny/crossref_metadata_2025_split huggingface dataset:
Covalent Photosensitizer–Polyoxometalate‐Catalyst Dyads for Visible‐Light‐Driven Hydrogen Evolution
Authors: Schönweiz Stefanie , Rommel Sebastian A. , Kübel Joachim , Micheel Mathias , Dietzek Benjamin , Rau Sven , Streb Carsten 
Published: July 2016

AbstractA general concept for the covalent linkage of coordination compounds to bipyridine‐functionalized polyoxometalates is presented. The new route is used to link an iridium photosensitizer to an Anderson‐type hydrogen‐evolution catalyst. This covalent dyad catalyzes the visible‐light‐driven hydrogen evolution reaction (HER) and shows superior HER activity compared with the non‐covalent reference. Hydrogen evolution is observed over periods >1 week. Spectroscopic, photophysical, and electrochemical analyses give initial insight into the stability, electronic structure, and reactivity of the dyad. The results demonstrate that the proposed linkage concept allows synergistic covalent interactions between functional coordination compounds and reactive molecular metal oxides.
Synergy between R&D and advertising on shareholder value: Does firm size matter?
Authors: Peng Chi‐Lu , Wei An‐Pin , Chen Miao‐Ling , Huang Wen‐Tsung 
Published: July 2016

AbstractUsing the hierarchical linear model, we examine whether R&D and advertising and their synergy influence firm value. We also investigate whether firm size moderates the market value effects of R&D, advertising, and the synergistic effect of R&D and advertising on firm value. We find that R&D and the synergy between R&D and advertising have significant positive effects on shareholder value. Moreover, we find that the effects of R&D and advertising are significantly higher in large firms than small firms, while the synergistic effect is significantly positive in small firms but not in large firms. These results offer important insight for executives on the implications of resource allocation on R&D and advertising expenditures to create firm value. Copyright © 2016 ASAC. Published by John Wiley & Sons, Ltd.
Berliner Blau – ein elektrochromes Material mit vielen Facetten
Authors: Wagner Corina , Oetken Marco 
Published: July 2016

AbstractKann man mit Berliner Blau als elektrochromes Material Energie sparen? Elektrochrome Fensterscheiben können durch Reduktion der Licht‐ und Wärmestrahlung helfen, Energie einzusparen. Außerdem kann Berliner Blau in neuartigen Batteriesystemen als Kathodenmaterial verwendet werden und somit zusätzlich als Energiespeicher fungieren.
On The Potential of Dynamic Nuclear Polarization Enhanced Diamonds in Solid‐State and Dissolution 13C NMR Spectroscopy
Authors: Bretschneider Christian O. , Akbey Ümit , Aussenac Fabien , Olsen Greg L. , Feintuch Akiva , Oschkinat Hartmut , Frydman Lucio 
Published: July 2016

AbstractDynamic nuclear polarization (DNP) is a versatile option to improve the sensitivity of NMR and MRI. This versatility has elicited interest for overcoming potential limitations of these techniques, including the achievement of solid‐state polarization enhancement at ambient conditions, and the maximization of 13C signal lifetimes for performing in vivo MRI scans. This study explores whether diamond's 13C behavior in nano‐ and micro‐particles could be used to achieve these ends. The characteristics of diamond's DNP enhancement were analyzed for different magnetic fields, grain sizes, and sample environments ranging from cryogenic to ambient temperatures, in both solution and solid‐state experiments. It was found that 13C NMR signals could be boosted by orders of magnitude in either low‐ or room‐temperature solid‐state DNP experiments by utilizing naturally occurring paramagnetic P1 substitutional nitrogen defects. We attribute this behavior to the unusually long electronic/nuclear spin‐lattice relaxation times characteristic of diamond, coupled with a time‐independent cross‐effect‐like polarization transfer mechanism facilitated by a matching of the nitrogen‐related hyperfine coupling and the 13C Zeeman splitting. The efficiency of this solid‐state polarization process, however, is harder to exploit in dissolution DNP‐enhanced MRI contexts. The prospects for utilizing polarized diamond approaching nanoscale dimensions for both solid and solution applications are briefly discussed.
Furfural Synthesis from d‐Xylose in the Presence of Sodium Chloride: Microwave versus Conventional Heating
Authors: Xiouras Christos , Radacsi Norbert , Sturm Guido , Stefanidis Georgios D. 
Published: July 2016

AbstractWe investigate the existence of specific/nonthermal microwave effects for the dehydration reaction of xylose to furfural in the presence of NaCl. Such effects are reported for sugars dehydration reactions in several literature reports. To this end, we adopted three approaches that compare microwave‐assisted experiments with a) conventional heating experiments from the literature; b) simulated conventional heating experiments using microwave‐irradiated silicon carbide (SiC) vials; and at c) different power levels but the same temperature by using forced cooling. No significant differences in the reaction kinetics are observed using any of these methods. However, microwave heating still proves advantageous as it requires 30 % less forward power compared to conventional heating (SiC vial) to achieve the same furfural yield at a laboratory scale.
Immobilization of a Metal–Nitrogen–Carbon Catalyst on Activated Carbon with Enhanced Cathode Performance in Microbial Fuel Cells
Authors: Yang Wulin , Logan Bruce E. 
Published: July 2016

AbstractApplications of microbial fuel cells (MFCs) are limited in part by low power densities mainly due to cathode performance. Successful immobilization of an Fe–N–C co‐catalyst on activated carbon (Fe–N–C/AC) improved the oxygen reduction reaction to nearly a four‐electron transfer, compared to a twoelectron transfer achieved using AC. With acetate as the fuel, the maximum power density was 4.7±0.2 W m−2, which is higher than any previous report for an air‐cathode MFC. With domestic wastewater as a fuel, MFCs with the Fe–N–C/AC cathode produced up to 0.8±0.03 W m−2, which was twice that obtained with a Pt‐catalyzed cathode. The use of this Fe–N–C/AC catalyst can therefore substantially increase power production, and enable broader applications of MFCs for renewable electricity generation using waste materials.
The resilience of reef invertebrate biodiversity to coral mortality
Authors: Nelson Hannah R. , Kuempel Caitlin D. , Altieri Andrew H. 
Published: July 2016

AbstractFoundation species provide many important ecosystem functions including the provision of habitat for diverse communities, but their degradation and mortality has the potential to compromise these roles. Corals are widely recognized foundation species that create reef habitats that are hotspots for biodiversity. However, the impact of global reef degradation on overall patterns of biodiversity remains difficult to predict because of our limited knowledge of mechanistic relationships between reef structure and community composition. We examined the resilience of invertebrate abundance and biodiversity on reefs following a recent coral mass mortality event on the Caribbean coast of Panama. First, we surveyed mobile invertebrate communities at both healthy and degraded reef sites and found that dead coral habitats support invertebrate assemblages that can be more diverse and abundant than live coral habitats and that coral habitat (whether live or dead) in turn supports higher diversity and abundance than structurally simple sand areas without coral. Second, we experimentally tested mechanisms of reef habitat suitability for invertebrate colonization by manipulating coral mortality and structural complexity. We found that the abundance and species richness of mobile invertebrates were significantly affected by substrate complexity rather than whether coral was live or dead. However, we detected shifts in species identity between live and dead coral. Moreover, the sensitivity of the community to reef structural complexity indicates that the ability of degraded coral reefs to sustain invertebrate assemblages is unlikely to persist if declines in reef complexity outpace recovery of living corals to the reef. Our findings suggest that the biodiversity‐sustaining function of reefs has the potential to persist following coral disturbance at the scale of entire reefs and that some metrics of community structure are therefore resilient to events of foundation species mortality.
Efficient Enzymatic Oxidation of Glucose Mediated by Ferrocene Covalently Attached to Polyethylenimine Stabilized Gold Nanoparticles
Authors: Dilusha Cooray M. C. , Sandanayake Saman , Li Fengwang , Langford Steven J. , Bond Alan M. , Zhang Jie 
Published: July 2016

AbstractBioanodes for fuel cell applications require highly efficient oxidation reactions to achieve a sufficiently large current density. In this study, gold nanoparticles have been synthesized using branched polyethylenimine (bPEI), a well‐known polymer that forms a hydrogel in water, as the stabilizer. Primary amine groups available in bPEI provide active sites for further conjugation with ferrocene propionic acid via the 1‐Ethyl‐3‐(3‐dimethylaminopropyl)carbodiimide coupling reaction, with the enzyme glucose oxidase, using glutaraldehyde as linkers. This composite material was then used for the fabrication of glucose oxidase electrodes by drop casting of aqueous solutions onto glassy carbon electrodes. The three‐dimensional structure offered by the new hydrogel facilitates communication between the enzyme and the electrode through the redox mediator ferrocene. This allows the glucose oxidase electrode to exhibit excellent activity towards electrocatalytic oxidation of glucose in phosphate buffer solutions at pH 7 with a maximum current density of approximately 800 μA cm−2, one of the highest values reported so far for redox hydrogel based glucose oxidase electrodes. Over a wide glucose concentration range, the enzyme response follows that predicted by the Michaelis‐Menten equation with a Michaelis constant of 8.4 mM. In the sensing context, this electrode also exhibits a wide linear dynamic glucose concentration range of 0.5–10 mM with a limit of detection of 0.04 mM.
Kinetics of Quantized Charging of Au144 Nanoclusters
Authors: Wang Dengchao , Yu Yun , Sun Tong , Mirkin Michael V. 
Published: July 2016

AbstractElectron transfer (ET) in monolayer‐protected gold clusters (Au MPCs) is crucial for revealing their fundamental energetic and kinetic properties and potential electrochemical and optical applications. In this Communication, we measured the kinetics of quantized charging processes of the Au144 MPCs. A detailed mathematical model was developed, including ET kinetics and diffusion in MPCs. The charging processes of controlled core states were treated as multistep ET reactions, and the corresponding rate constants were determined by steady‐state voltammetry and scanning electrochemical microscopy (SECM).
Getting to Know Patients
Authors: Eden Caroline 
Published: July 2016

AbstractAs a third‐year medical student, I have the job of being the first person from the medical team to check in on patients in the morning, follow up on consults that they may need, and communicate with people from other services who are involved with patients’ care. Because third‐year medical students have the most time of anyone on the medical team, we are encouraged to get to know our patients. We are encouraged to take time to understand our patients’ conditions on both a medical and personal level, that is, both to read about their complex diseases and to talk about their preferences, goals, families, and lives outside the hospital. As best we can, we then communicate their personal needs and preferences to the medical team of doctors, nurses, social workers and others. What could be wrong with that?
Politics and Public Health: The Flint Drinking Water Crisis
Authors: Gostin Lawrence O. 
Published: July 2016

AbstractThe Flint, Michigan, lead drinking water crisis is perhaps the most vivid current illustration of health inequalities in the United States. Since 2014, Flint citizens—among the poorest in America, mostly African American—had complained that their tap water was foul and discolored. But city, state, and federal officials took no heed. In March 2016, an independent task force found fault at every level of government and also highlighted what may amount to criminal negligence for workers who seemingly falsified water‐quality results, allowing the people of Flint to continue to be exposed to water well above the federally allowed lead levels. It would have been possible to prevent lead seeping into the drinking water by treating the pipes with federally approved anticorrosives for around $100 per day. But today the cost of repairing the Flint water system is estimated at $1.5 billion, and fixing the ageing and lead‐laden system across the United States would cost at least $1.3 trillion. How will Flint residents get justice and fair compensation for the wrongs caused by individual and systemic failures? And how will governments rebuild a water infrastructure that is causing and will continue to cause toxic conditions, particularly in economically marginalized cities and towns across America?
Nonhuman Primates, Human Need, and Ethical Constraints
Authors: DeGrazia David 
Published: July 2016

Abstract“The Ethics of Infection Challenges in Primates,” by Anne Barnhill, Steven Joffe, and Franklin Miller, is an exceptionally timely contribution to the literature on animal research ethics. Animal research has long been both a source of high hopes and a cause for moral concern. When it comes to infection challenge studies with nonhuman primates, neither the hope—to save thousands of human lives from such diseases as Ebola and Marburg—nor the concern—the conviction that primates deserve especially strong protections—could be much higher. Coming just a few years after the National Institutes of Health adopted the Institute of Medicine's recommendations regarding chimpanzees, Barnhill and colleagues attempt to nudge the clarification and specification—one might say the evolution—of NHP research ethics and regulation. They assert that NHP challenge studies “are not justified by marginal gains in human safety or by efficacy gains that are unlikely to translate directly into saving human lives or preventing morbidity.” How, in turn, is their standard—which, although stringent, does permit causing NHPs to suffer and die for human benefit—to be justified?
Beyond Primates: Research Protections and Animal Moral Value
Authors: Walker Rebecca L. 
Published: July 2016

AbstractShould monkeys be used in painful and often deadly infectious disease research that may save many human lives? This is the challenging question that Anne Barnhill, Steven Joffe, and Franklin G. Miller take on in their carefully argued and compelling article “The Ethics of Infection Challenges in Primates.” The authors offer a nuanced and even‐handed position that takes philosophical worries about nonhuman primate moral status seriously and still appreciates the very real value of such research for human welfare. Overall, they argue for an extension and revision of the recommendations regarding chimpanzee research offered by the Institute of Medicine in 2011; the practical upshot of their argument would allow for infection challenge research for promising interventions for Ebola and Marburg virus diseases but not for smallpox or the common cold. The IOM recommendations regarding chimpanzee research put in motion an exceptionalist policy for this great ape population. Barnhill and colleagues’ proposal would enlarge the scope of that exceptionalism to embrace NHPs other than great apes. But is such exceptionalism warranted? It is not obvious to me either that the more sophisticated capacities of a species as a whole give it greater ethical protections or that less intellectually or socially sophisticated animals ought to therefore receive less protection when it comes to painful experimental interventions.
The End of Chimpanzee Research
Authors: Gruen Lori 
Published: July 2016

AbstractIn June 2010, Rosie, a descendant of the chimpanzees sent into space, and thirteen others were shipped from New Mexico to a laboratory in Texas for possible use in hepatitis research. They were to be the first group of approximately two hundred chimpanzees to be reintroduced to invasive research. These chimpanzees had been in semiretirement for a decade after being removed from an enormous laboratory that was in egregious violation of the Animal Welfare Act. I, along with many bioethicists, scientists, primatologists, and others, have long been arguing against the use of chimpanzees in invasive research on ethical grounds. The United States is now poised to join the rest of the world in ending invasive research on our closest primate relatives.
Impact of Different Fertilizer Types on Nutrient Pollutant Loads from Rice Paddy Fields in South Korea
Authors: Jang Jeong‐Ryeol , Hong Eun‐Mi , Song Inhong , Kang Moon‐Seong , Cho Jae‐Young , Cho Young‐Kweon 
Published: July 2016

AbstractThe objective of this study was to evaluate the effects of best management practices (BMPs) on nutrient load reduction from rice paddy fields. Three different fertilizations were considered as the study BMPs: slow‐release chemical fertilizer (SC), swine compost manure (CM) and swine liquid manure (LM). Two experiments were conducted independently in fields with sizes of 100 × 40 m in the Saemangeum region. One experiment was conducted at Iksan City to compare conventional chemical fertilizer (CA) with SC in non‐point source (NPS) surface runoff, while the other was conducted at Kimje City to compare chemical fertilizer (CB) with CM and LM. Nutrient surface discharge from the SC‐treated paddy was 50–55% less than from the CA‐treated paddy. The nutrient loads from the LM‐ and CM‐treated fields were 18–48% less than the CB field. This indicates that the SC, CM and LM applications can effectively reduce paddy surface nutrient loads and thus be alternatives to chemical fertilizer application. However, rice yield was slightly decreased (by approximately 7.5%) in the SC‐treated field compared to the CA‐treated field. With certain compensation measures for the economic losses, the alternative fertilization can be sustainable ways for paddy nutrient load reduction. Copyright © 2016 John Wiley & Sons, Ltd.
Vegetative Filter Strip (Vfs) Applications for Runoff and Pollution Management in the Saemangeum Area of Korea
Authors: Choi Kyung‐Sook , Lee Seul‐Gi , Jang Jeong‐Ryeol 
Published: July 2016

AbstractThis study was conducted to develop a vegetative filter strip (VFS) technique to manage agricultural non‐point source (NPS) pollution in the region in Korea. The experimental plots were constructed with two different sizes and slopes in the uplands within the Saemangeum Basin. The soil type of the study area was classified as loam with NRCS hydrologic soil type B, and showed typical upland soil characteristics. The rainfall–runoff relationships and NPS pollution reduction effects of the VFS were assessed, and the total cost of VFS application was estimated. It was noted that runoff reduction effects ranged from 14.1 to 69.3%, and NPS pollution reduction effects were 9.8–94.2% in suspended solid (SS), 24.0–73.3% in total nitrogen (T‐N) and 47.6–80.9% in total phosphorus (T–P) from the VFS plots. The variations of VFS effects were caused by various factors including size and slope of the source area, cover ratio and width of VFS, as well as rainfall characteristics. The total VFS application cost was estimated to be approximately US$3390 ha−1 yr.−1, considering the costs for construction and maintenance of the VFS system and the loss of benefit caused by giving up crop cultivation in the area needed for VFS construction. Copyright © 2016 John Wiley & Sons, Ltd.
Microscopic and immunohistochemical study on the cornification of the developing beak in the turtle Emydura macquarii
Authors: Alibardi Lorenzo 
Published: July 2016

ABSTRACTThe development and cornification of the ramphoteca (beak) in turtles are not known. The microscopic aspects of beak formation have been analyzed in the pleurodirian turtle Emydura macquarii using histological, immunocytochemical and ultrastructural methods. At embryonic Stage 15 the maxillar beak is originated from discontinuous placodes (one frontal and two oral) formed in the epidermis above and below the mouth that later merge into the epidermis of the beak. The mandibular beak is formed by two lateral placodes. In the placodes, basal keratinocytes in contact with local mesenchymal condensations become columnar, and generate suprabasal cells forming 5–6 layers of embryonic epidermis at Stages 17–20 and a compact shedding alpha‐layer at the base of the embryonic epidermis. These keratinocytes contain irregular or aggregated reticular bodies made of 30–40 nm thick strands of coarse filaments, mixed with tonofilaments and sparse lipid droplets. Beneath the shedding layer are present 3–4 layers of keratinocytes accumulating coarse filaments mixed with beta‐corneous packets, and underneath spindle‐shaped beta‐cells differentiate where beta‐corneous packets completely replace the reticulate bodies. Differently from scales where corneocytes partially merge, beak corneocytes remain separated but they are joined by numerous interlocking spines. The production of beta‐cells in the thick corneous layer of the developing beak, like in claws, occurs before the differentiation of beta‐cells in the body scutes. This indicates that a massive mesenchymal condensation triggers beta‐differentiation before this process is later activated in most of body scutes of the carapace and plastron. J. Morphol. 277:1309–1319, 2016. © 2016 Wiley Periodicals, Inc.
Oogenesis: From Oogonia to Ovulation in the Flagfish, Jordanella floridae Goode and Bean, 1879 (Teleostei: Cyprinodontidae)
Authors: Uribe Mari Carmen , Grier Harry J. , García‐Alarcón Adriana , Parenti Lynne R. 
Published: July 2016

ABSTRACTWe provide histological details of the development of oocytes in the cyprinodontid flagfish, Jordanella floridae. There are six stages of oogenesis: Oogonial proliferation, chromatin nucleolus, primary growth (previtellogenesis [PG]), secondary growth (vitellogenesis), oocyte maturation and ovulation. The ovarian lamellae are lined by a germinal epithelium composed of epithelial cells and scattered oogonia. During primary growth, the development of cortical alveoli and oil droplets, are initiated simultaneously. During secondary growth, yolk globules coalesce into a fluid mass. The full‐grown oocyte contains a large globule of fluid yolk. The germinal vesicle is at the animal pole, and the cortical alveoli and oil droplets are located at the periphery. The disposition of oil droplets at the vegetal pole of the germinal vesicle during late secondary growth stage is a unique characteristic. The follicular cell layer is composed initially of a single layer of squamous cells during early PG which become columnar during early vitellogenesis. During primary and secondary growth stages, filaments develop among the follicular cells and also around the micropyle. The filaments are seen extending from the zona pellucida after ovulation. During ovulation, a space is evident between the oocyte and the zona pellucida. Asynchronous spawning activity is confirmed by the observation that, after ovulation, the ovarian lamellae contain follicles in both primary and secondary growth stages; in contrast, when the seasonal activity of oogenesis and spawning ends, after ovulation, the ovarian lamellae contain only follicles in the primary growth stage. J. Morphol. 277:1339–1354, 2016. © 2016 Wiley Periodicals, Inc.