The preparation of a series of amidinato and guanidinato zinc halide complexes incorporating ligands of varying steric bulk is described, and their thermal stabilities compared. Salt elimination reactions between [M(Giso)] (M = K or Li; Giso = [(ArN)(2)CNCy(2)](-), Ar = 2,6-diisopropylphenyl, Cy = cyclohexyl) and ZnX(2) (X = I or Br) have yielded the monomeric complexes [(Giso)ZnI] and [(Giso)Z...

Aim: To determine the incidence, methods of diagnosis, treatment strategies and outcomes for acute retinal necrosis (ARN) in the UK. Methods: A 12-month active case ascertainment study was carried out between March 2001 and March 2002 to record cases of ARN presenting to ophthalmologists via the British Ophthalmological Surveillance Unit (BOSU) reporting system. Questionnaires were sent to the ...

Imido-hydrido complexes (ArN)Mo(H)(Cl)(PMe3)3 (1) and (ArN)Mo(H)2(PMe3)3 (2) (Ar = 2,6-diisopropylphenyl) catalyse a variety of hydroboration reactions, including the rare examples of addition of HBCat to nitriles to form bis(borylated) amines RCH2N(BCat)2. Stoichiometric reactivity of complexes 1 and 2 with nitriles and HBCat suggest that catalytic reactions proceed via a series of agostic bor...

Herpes simplex virus (HSV) is the most common cause of acute viral encephalitis. Acute retinal necrosis (ARN) is a rapidly progressing and potentially blinding eye disease that may be induced by HSV. The present case study reports the very rare case of a patient with herpes simplex encephalitis (HSE) combined with acute retinal necrosis (ARN). A 47-year-old woman was admitted to hospital with p...

We have proposed that the ability of T4 to produce non-glucosylated progeny after a single cycle of growth on a galU rglA rglB+ mutant of Escherichia coli is due to the initiation of the rglB+ function by a phage-coded, anti-restriction endonuclease protein. Based on this hypothesis, we screened T4 deletion mutants for failure to give a burst in this host. The absence of an arn gene in phage mu...

Résumé. Les fonctions biologiques dans la cellule mettent en jeu des interactions 3D entre protéines et ARN. Les avancées des techniques exérimentales restent insuffisantes pour de nombreuse applications. Il faut alors pouvoir prédire in silico les interactions protéine-ARN. Dans ce contexte, nos travaux sont focalisés sur la construction de fonctions de score permettant d’ordonner les solution...

We investigate the photodissociation, geminate recombination and relaxation dynamics in size-selected I2 2 •Arn cluster ions using a coupled quantum-classical molecular dynamics method and a model Hamiltonian gained from diatomics-in-ionic systems. We calculate photofragmentation yields of various charged product clusters of the dissociated I•Arf or recombined I2 2 •Arf 8 forms as a function of...

BACKGROUND The aim of this study was to investigate the involvement of the nitric oxide (NO) pathway in osteoarthritis (OA). MATERIAL AND METHODS The study groups consisted of 32 patients with knee OA and 31 healthy controls. In peripheral venous blood samples (from the OA patients and the controls) and in synovial fluid samples (from the OA patients), the concentrations of L-arginine (ARN), ...

The main contribution of this work is to propose energy-eecient randomized initialization protocols for ad-hoc radio networks (ARN, for short). First, we show that if the number n of stations is known beforehand, the single-channel ARN can be initialized by a protocol that terminates, with high probability, in O(n) time slots with no station being awake for more than O(log n) time slots. We the...

BACKGROUND To report a case of simultaneous detection of cytomegalovirus (CMV) in acute retinal necrosis (ARN) due to varicella-zoster virus (VZV) in an immunocompetent adult. METHODS A 65-year-old healthy woman presented with necrotizing retinitis. Vitreous, tears, saliva, and swabs of the auricular and forehead skin areas were collected and tested by polymerase chain reaction analysis at va...