Characterization of the interfaces between Au(hkl) single crystal basal plane electrodes and [Emmim][Tf2N] ionic liquid

The interface between Au(hkl) basal planes and the ionic liquid 1-Ethyl-2,3-dimethyl imidazolium bis(trifluoromethyl)sulfonil imide was investigated by using both cyclic voltammetry and laser-induced temperature jump. Cyclic voltammetry showed characteristic features, revealing surface sensitive processes at the interfaces Au(hkl)/[Emmim][Tf2N]. From laser-induced heating the potential of maximum entropy (pme) is determined. Pme is close to the potential of zero charge (pzc) and, therefore, the technique provides relevant interfacial information. The following order for the pme values has been found: Au(111) > Au(100) > Au(110). This order correlates well with work function data and values of pzc in aqueous solutions.

Mercury determination in urine samples by gold nanostructured screen-printed carbon electrodes after vortex-assisted ionic liquid dispersive liquid–liquid microextraction

A novel approach is presented to determine mercury in urine samples, employing vortex-assisted ionic liquid dispersive liquid–liquid microextraction and microvolume back-extraction to prepare samples, and screen-printed electrodes modified with gold nanoparticles for voltammetric analysis. Mercury was extracted directly from non-digested urine samples in a water-immiscible ionic liquid, being back-extracted into an acidic aqueous solution. Subsequently, it was determined using gold nanoparticle-modified screen-printed electrodes. Under optimized microextraction conditions, standard addition calibration was applied to urine samples containing 5, 10 and 15 μg L−1 of mercury. Standard addition calibration curves using standards between 0 and 20 μg L−1 gave a high level of linearity with correlation coefficients ranging from 0.990 to 0.999 (N = 5). The limit of detection was empirical and statistically evaluated, obtaining values that ranged from 0.5 to 1.5 μg L−1, and from 1.1 to 1.3 μg L−1, respectively, which are significantly lower than the threshold level established by the World Health Organization for normal mercury content in urine (i.e., 10–20 μg L−1). A certified reference material (REC-8848/Level II) was analyzed to assess method accuracy finding 87% and 3 μg L−1 as the recovery (trueness) and standard deviation values, respectively. Finally, the method was used to analyze spiked urine samples, obtaining good agreement between spiked and found concentrations (recovery ranged from 97 to 100%).

Oxidation of Ethanol and Its Derivatives on Well Defined Pt Single Crystal Electrodes Vicinal to Pt(111): A Comparative Study

The oxidation of ethanol (EtOH) at Pt(111) electrodes is dominated by the 4e path leading to acetic acid. The inclusion of surface defects such as those present on stepped surfaces leads to an increase of the reactivity towards the most desirable 12e path leading to CO2 as final product. This path is also favored when the methyl group is more oxidized, as in the case of ethylene glycol (EG) that spontaneously decomposes to CO on Pt(111) electrodes, thus showing a more effective breaking of the C-C bond. Some trends in reactivity can be envisaged when other derivative molecules are compared at well-ordered electrodes. This strategy was used in the past, but the improvement in the electrode pretreatment and the overall information available on the subject suggest that relevant information is still missing.

Counter bond, 1724/5 January 22

Handwritten counter bond between Samuel Whittemore and Andrew Bordman, securing Whittemore's loan from Nathaniel Hancock and James Reade.

Counter bond, 1728 June 5

Handwritten counter bond between Francis Foxcroft and Jonathan Remington, securing Foxcroft's loan from Andrew Bordman.

Counter bond, 1731 August 4

Handwritten counter bond between Stephen Palmer and Samuel Whittemore, and Edward Hutchinson, securing Stephen Palmer and Samuel Whittemore's loan from William Brattle and Andrew Bordman.

Narratives and counter-narratives on "marriage of convenience" : conjugality and (il)legality in portuguese migration policies and in couples’ experiences

Tese de doutoramento, Sociologia (Sociologia da Família, Juventude e das Relações do Género), Universidade de Lisboa, Instituto de Ciências Sociais, 2016

Counter-reforms in times of prosperity. OSW Point of View, September 2006

In 2000, Vladimir Putin came to power after nearly a decade of the rule of the first Russian president, Boris Yeltsin. As prime minister, and later as a candidate for president, Putin announced that he would reform the state. The main assumptions of this reform were presented during a congress of the pro-Kremlin Unity movement, in Putin's address entitled 'Russia at the turn of the millennium' which was delivered on 29 December 1999, and later in a open letter to voters published on 25 February 2000. Both declarations were rather general, but they gave a clear picture of the principal directions of and priority areas for the future president's efforts: they outlined Russia's development path as pro-market and democratic. Nearly seven years have passed since Vladimir Putin came to power, a time for a summary of his achievements. In a way, Vladimir Putin has partially delivered on his initial declarations; indeed, Russia has undergone a deep transformation. However, when seen in the light of the president’s initial promises, the changes appear to be no more than 'counter-reforms', because instead of putting into practice the policy he outlined seven years ago, they have largely followed a different, if not entirely opposite direction.

The EU Counter-Terrorism Policy Responses to the Attacks in Paris: Towards an EU Security and Liberty Agenda. CEPS Liberty and Security in Europe No. 81/February 2015

This paper examines the main EU-level initiatives that have been put forward in the weeks following the attacks in Paris in January 2015, which will be discussed in the informal European Council meeting of 12 February 2015. It argues that a majority of these proposals predated the Paris shootings and had until that point proved contentious as regards their efficacy, legitimacy and lawfulness. The paper finds that EU counterterrorism responses raise two fundamental challenges: A first challenge is posed to the freedom of movement, Schengen and EU citizenship. Priority is being given to the expanded use of large-scale surveillance and systematic monitoring of all travellers including EU citizens, which stands in contravention of Schengen and the free movement principle. A second challenge concerns EU democratic rule of law. Current pressures calling for the adoption of measures such as the EU Passenger Name Record challenge the scrutiny roles held by the European Parliament and the Court of Justice of the EU on counterterrorism measures in a post-Lisbon Treaty setting. The paper proposes that the EU adopts a new European Agenda on Security and Liberty based on an EU security (criminal justice-led) cooperation model that is firmly anchored in current EU legal principles and rule of law standards. This model would call for ‘less is more’ concerning the use, processing and retention of data by police and intelligence communities. Instead, it would pursue better and more accurate use of data meeting the quality standards of evidence in criminal judicial proceedings.

The EU and its Counter-Terrorism Policies after the Paris Attacks. Liberty and Security in Europe No. 84, 27 November 2015

This paper examines the EU’s counter-terrorism policies responding to the Paris attacks of 13 November 2015. It argues that these events call for a re-think of the current information-sharing and preventive-justice model guiding the EU’s counter-terrorism tools, along with security agencies such as Europol and Eurojust. Priority should be given to independently evaluating ‘what has worked’ and ‘what has not’ when it comes to police and criminal justice cooperation in the Union. Current EU counter-terrorism policies face two challenges: one is related to their efficiency and other concerns their legality. ‘More data’ without the necessary human resources, more effective cross-border operational cooperation and more trust between the law enforcement authorities of EU member states is not an efficient policy response. Large-scale surveillance and preventive justice techniques are also incompatible with the legal and judicial standards developed by the Court of Justice of the EU. The EU can bring further added value first, by boosting traditional policing and criminal justice cooperation to fight terrorism; second, by re-directing EU agencies’ competences towards more coordination and support in cross-border operational cooperation and joint investigations, subject to greater accountability checks (Europol and Eurojust +); and third, by improving the use of policy measures following a criminal justice-led cooperation model focused on improving cross-border joint investigations and the use of information that meets the quality standards of ‘evidence’ in criminal judicial proceedings. Any EU and national counter-terrorism policies must not undermine democratic rule of law, fundamental rights or the EU’s founding constitutional principles, such as the free movement of persons and the Schengen system. Otherwise, these policies will defeat their purpose by generating more insecurity, instability, mistrust and legal uncertainty for all.

The Effects of Sanctions and Counter-Sanctions on EU-Russian Trade Flows. CEPS Commentary, 5 July 2016

After Russia annexed Crimea in early 2014 and then intervened, manu militari, in the Eastern part of Ukraine, the European Union wanted to show its disapproval and put pressure on Russia to change its behaviour. A wide variety of measures were taken, including the imposition of individual restrictions, such as asset freezes and travel bans, but also the suspension of development loans from the EBRD. But the EU (together with the United States) also took, in July and September 2014, a set of broader measures: limited access to EU primary and secondary capital markets for targeted Russian financial institutions and energy and defence companies; export and import bans on trade in arms; an export ban for dual-use goods and reduction of Russia’s access to sensitive technologies and services linked to oil production.