Visible-light-driven coproduction of diesel precursors and hydrogen from lignocellulose-derived methylfurans

Photocatalytic hydrogen production from biomass is a promising alternative to water splitting thanks to the oxidation half-reaction being more facile and its ability to simultaneously produce solar fuels and value-added chemicals. Here, we demonstrate the coproduction of H2 and diesel fuel precursors from lignocellulose-derived methylfurans via acceptorless dehydrogenative C 12C coupling, using a Ru-doped ZnIn2S4 catalyst and driven by visible light. With this chemistry, up to 1.04\u2009g\u2009gcatalyst 121\u2009h 121 of diesel fuel precursors (~41% of which are precursors of branched-chain alkanes) are produced with selectivity higher than 96%, together with 6.0\u2009mmol\u2009gcatalyst 121\u2009h 121 of H2. Subsequent hydrodeoxygenation reactions yield the desired diesel fuels comprising straight- and branched-chain alkanes. We suggest that Ru dopants, substituted in the position of indium ions in the ZnIn2S4 matrix, improve charge separation efficiency, thereby accelerating C 12H activation for the coproduction of H2 and diesel fuel precursors

A MSFD complementary approach for the assessment of pressures, knowledge and data gaps in Southern European Seas : the PERSEUS experience

PERSEUS project aims to identify the most relevant pressures exerted on the ecosystems of the Southern European Seas (SES), highlighting knowledge and data gaps that endanger the achievement of SES Good Environmental Status (GES) as mandated by the Marine Strategy Framework Directive (MSFD). A complementary approach has been adopted, by a meta-analysis of existing literature on pressure/impact/knowledge gaps summarized in tables related to the MSFD descriptors, discriminating open waters from coastal areas. A comparative assessment of the Initial Assessments (IAs) for five SES countries has been also independently performed. The comparison between meta-analysis results and IAs shows similarities for coastal areas only. Major knowledge gaps have been detected for the biodiversity, marine food web, marine litter and underwater noise descriptors. The meta-analysis also allowed the identification of additional research themes targeting research topics that are requested to the achievement of GES. 2015 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY license.peer-reviewe

Introductory Essay: Traditional Knowledge, Spirituality and Lands

In times like ours, when people are inundated with notions of consumerist identities, culture is often seen mainly as a resource to be tapped into for economic development. This certainly is true of blatant consumerist culture produced by such economic behemoths as Hollywood, but it is a narrow view on the importance and functions of culture. The objective of this issue of the International Indigenous Policy Journal is to demonstrate the radical importance of culture and spirituality in not only defining a people and their society but also in affecting their well-being and how these things are all interrelated

The Potential Impacts of Religion and Spirituality on First Nation Teenage Fertility

After reviewing some American research on the impacts religion has on adolescent sexual decision making and teenage pregnancy, this article considered the few instances of Canadian research addressing this topic. With this contextual information in place, it then moves on to report on analysis comparing the 2001 Census figures on religions declared by Canadian First Nation communities to teen fertility rates and the Community Well-Being Index (CWB). It finds that First Nations teen fertility rates are related to relative socio-economic deprivation, but also that religion has impacts on sexual decision making at the individual level and those First Nations communities showing no major religious adherence have teenage fertility rates of up to 140 per 1000, as compared to those communities showing one major tradition whose fertility rates are closer to 109 per 1000 adolescent First Nation women

Are They Like Us, Yet? Some Thoughts on Why Religious Freedom Remains Elusive for Aboriginals in North America

It is well-documented that European culture differs from that of Aboriginal culture. Perhaps one of the most striking differences is in the relationships and attitudes each group has towards land. For Europeans the land is a commemorative gift of the creator there to be exploited for economic benefit; for Aboriginal peoples, the land is also a gift but one that a continuing extension of the creator’s immanence in which all things are related to one another. The one is an economic relation, the other a spiritual relation that denotes family. When two very different cultural systems encounter one another, there are bound to be clashes. Regardless, it is the overriding interests of the state that take precedence in countries where religious freedoms are constitutionally guaranteed – but such guarantees apply only insofar as the religions seeking freedom mirrors that of the dominate society. This paper explores these differences in relationships to land and how Aboriginal religious freedom suffers as a result, which has significant impacts on well-being and cultural continuity

Socially Constructed Teen Motherhood: A Review

This article reviews literature on the gradual construction of teenage pregnancy as a social issue in North America. It shows how teen motherhood emerged not as an issue unto itself, but as a microcosm of numerous, closely intertwined phenomena including: the evolution of Western views on human sexuality and gender roles; the place of religious values in society; and the emergence of various modern technologies, the social and medical sciences, and how such disciplines view childhood, motherhood, and women in society. In particular, it shows that even as teen pregnancy is today viewed primarily through public health and/or socioeconomic lenses, it has never been completely divorced from its original construction – as an indicator of failure to adhere to social, religious, and moral values. The article closes with an informal content analysis of several First Nations-related documents that highlight both similarities and differences to the non-Aboriginal perspective

In Situ Observation of the Formation and Structure of Hydrogen-Evolving Amorphous Cobalt Electrocatalysts

We have used in situ and operando X-ray absorption spectroscopy at the cobalt K-edge to study the formation of cobalt nanoparticles from a molecular precursor, as well as their structural evolution under hydrogen-evolving electrocatalytic conditions. We show that these particles, which are about 100–150 nm in diameter overall, are made of an uncommon form of amorphous metallic cobalt, the smallest ordered unit being 1 nm clusters of ∼50 cobalt atoms. In aqueous solution, these porous particles are partly oxidized into cobalt­(II), a fraction of which remains present as an outer shell during hydrogen evolution electrocatalysis, even at very high cathodic potentials. Our operando measurements show that the activity of the particles is correlated to the oxidized layer thickness, a thinner layer exposing a larger fraction of the active metallic cobalt and leading to a higher activity. These findings expand our current understanding of the solid–liquid interface in hydrogen evolution catalytic species in neutral pH and suggest new directions for the improvement of hydrogen-evolving catalytic systems