After many decades of intense research in low-coordinate phosphorus chemistry, the advent of Na[OCP] brought new stimuli to the field of CHOP isomers and derivatives thereof. The present theoretical study at the CCSD(T)/def2-TZVPP level describes the chemical space of CHOP isomers in terms of structures and potential energy surfaces, using oxaphosphirene as the starting point, but also covering substituted derivatives and COP− isomers. Bonding properties of the P–C, P–O, and C–O bonds in all neutral and anionic isomeric species are discussed on the basis of theoretical calculations using various bond strengths descriptors such as WBI and MBO, but also the Lagrangian kinetic energy density per electron as well as relaxed force constants. Ring strain energies of the superstrained 1H-oxaphosphirene and its barely strained oxaphosphirane-3-ylidene isomer were comparatively evaluated with homodesmotic and hyperhomodesmotic reactions. Furthermore, first time calculation of the ring strain energy of an anionic ring is described for the case of oxaphosphirenide.

Alterations in the generation, migration and integration of different subtypes of neurons in the medial prefrontal cortex (mPFC) microcircuit could play an important role in vulnerability to schizophrenia. Using in vivo cell-type specific manipulation of pyramidal neurons (PNs) progenitors, we aim to investigate the role of the schizophrenia risk-gene DiGeorge Critical Region 2 (Dgcr2) on cortical circuit formation in the mPFC of developing mice. This report describes how Dgcr2 knock down in upper-layer PNs impacts the functional maturation of PNs and interneurons (INs) in the mPFC. First, we demonstrate that Dgcr2 knock-down disrupts laminar positioning, dendritic morphology and excitatory activity of upper-layer PNs. Interestingly, inhibitory activity is also modified in Dgcr2 knock-down PNs, suggesting a broader microcircuit alteration involving interneurons. Further analyses show that the histological maturation of parvalbumin (PV) INs is not dramatically impaired, thus implying that other INs subtypes might be at play in the reported microcircuit alteration. Overall, this study unravels how local functional

La presente investigación es un aporte a la comprensión de la infancia y del maltrato infantil. Se llevó a cabo un estado del arte del conocimiento producido en las experiencias de investigación / intervención realizadas en el marco del Programa de Especialización del Maltrato Infantil de la Universidad Javeriana entre los años 2002 al 2006. El artículo recrea la actualidad de esta preocupación en Colombia, ofrece reinterpretaciones al discurso construido y plantea un marco para el análisis complejo del maltrato dentro de las relaciones entre adulto y niño.

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La mort d'un patient en situation palliative sous opioïde génère parfois un fort sentiment de culpabilité. « Ai-je précipité le décès du patient avec mon traitement opioïde ? » Bien que la littérature soit très claire quant à la sécurité des opioïdes utilisés correctement pour la gestion de la dyspnée ou de la douleur en soins palliatifs, il se peut que, dans certaines situations, on puisse en douter. Le médecin, face à sa crainte de nuire en administrant des opioïdes, pourrait être tenté de sous-traiter le patient, au risque de l'abandonner à sa souffrance. D'un autre côté, l'impuissance face à l'intensité de la souffrance du patient pourrait amener le médecin à vouloir le soulager à tout prix, au risque d'un geste euthanasiant. Cet article propose un aperçu du principe du double effet, comme élément de réponse à ce dilemme éthique. Extreme end-of-life situations and opioids : the double effect principle, a helpful guideThe death of a patient taking opioids can generate strong feelings of guilt. « Have I hastened my patient's death by my administration of opioids ? » Doubts may arise in certain situations, despite the proven safety of appropriate opioid use in the management of dyspnea and pain in the palliative care setting. Fearing the harms of opioid administration, some medical practitioners may undertreat patients, forsaking them to suffering. Other doctors, desperate to relieve their excruciating suffering at all cost, may in fact have recourse to euthanizing acts. This article seeks to answer this ethical dilemma with an overview of the double effect principle.