Étude bibliliographique des méthodes potentiométriques d'analyse du vin et du moût

In this paper, an overview of the application of potentiometry to wine and must ana1ysis is presented. The large number of electrodes nowadays available with good characteristics for routine use, namely good selectivity and low response times, allowing measurements in a broad linear dependence range, with a relative low cost, simple sample pre-treatment requirements, no sensitivity to colour or turbidity of the samples, make potentiometry an attractive instrumental tecnique for wine and must ana1ysis. Methods developed so far present good precision and the results show a fairly good agreement with those obtained by the application of reference methods

Quebra de dormência de macieira (Malus domestica) Eva cultivada no Vale do São Francisco.

O objetivo deste estudo foi avaliar o efeito de doses de cianamida hidrogenada (CH), nitrato 23 de cálcio (NC) e nitrato de potássio (NK) na quebra da dormência de macieiras, cultivar Eva no Vale do São Francisco, em Petrolina-PE

Cianamida hidrogenada, nitrato de potássio e Ubyfol para a quebra de dormência da pereira cv. Princesinha cultivada no Vale do São Francisco.

O objetivo deste estudo foi avaliar o efeito da cianamida hidrogenada (CH), nitrato de cálcio e Ubyfol®, na quebra da dormência da pereira cv. Princesinha no Vale do São Francisco em Petrolina-PE

Caracterização fenológia da pereira Princesinha cultivada no Vale do São Francisco.

O presente trabalho objetivou caracterizar os estádios fenológicos e a frutificação efetiva da pereira cv. Princesinha, cultivada sob clima Semiárido tropical, em Petrolina, PE

Caracterização fenológica, pegamento e produção de macieiras da variedade Daiane em Petrolina-PE.

O presente experimento foi conduzido de julho de 2009 a novembro de 2009,com o objetivo de caracterizar os estádios fenológicos, pegamento e produção de frutos de macieiras cv. Daiane, cultivadas em clima semiárido no Nordeste do Brasil. Os dados fenológicos foram determinados em observações diárias, do estádio de gema dormente ao amadurecimento de frutas. Foram avaliadas as seguintes variáveis: i) a frutificação efetiva; ii) o número de frutos por planta; iii) a produção de frutos por planta (kg); e iv) o rendimento de frutos (t/ha). O ciclo vegetativo da macieira, cv. Daiane, foi concluído em 138 dias, Sendo possível obter produção de maçãs sob condição semiárida tropical

The performance of Remicade (R)-optimized quantification assays in the assessment of Flixabi (R) levels

Background: The advent of Remicade (R) biosimilars, Remsima (R), Inflectra (R) and, more recently, Flixabi (R), has brought along the potential to decrease the costs associated with this therapy, therefore increasing its access to a larger group of patients. However, and in order to assure a soft transition, one must make sure the assays and algorithms previously developed and optimized for Remicade perform equally well with its biosimilars. This study aimed to: (a) validate the utilization of Remicade-optimized therapeutic drug monitoring assays for the quantification of Flixabi; and (b) determine the existence of Remicade, Remsima and Flixabi cross-immunogenicity. Methods: Healthy donors' sera spiked with Remicade, Remsima and Flixabi were quantified using three different Remicade-quantification assays, and the reactivity of anti-Remicade and anti-Remsima sera to Remicade and to its biosimilars was assessed. Results: The results show that all tested Remicade-infliximab-optimized assays measure Flixabi as accurately as they measure Remicade and Remsima: the intraclass correlation coefficients between theoretical and measured concentrations varied from 0.920 to 0.990. Moreover, the interassay agreement values for the same compounds were high (intraclass correlation coefficients varied from 0.936 to 0.995). Finally, the anti-Remicade and anti-Remsima sera reacted to the different drugs in a similar fashion. Conclusions: The tested assays can be used to monitor Flixabi levels. Moreover, Remicade, Remsima and Flixabi were shown to have a high cross-immunogenicity, which supports their high similarity but prevents their switching in nonresponders with antidrug antibodies.Portuguese IBD Group (GEDII, Grupo de Estudo da Doenca Inflamatoria Intestinal

Replicated Transfer Matrix Analysis of Ising Spin Models on `Small World' Lattices

We calculate equilibrium solutions for Ising spin models on `small world' lattices, which are constructed by super-imposing random and sparse Poissonian graphs with finite average connectivity c onto a one-dimensional ring. The nearest neighbour bonds along the ring are ferromagnetic, whereas those corresponding to the Poisonnian graph are allowed to be random. Our models thus generally contain quenched connectivity and bond disorder. Within the replica formalism, calculating the disorder-averaged free energy requires the diagonalization of replicated transfer matrices. In addition to developing the general replica symmetric theory, we derive phase diagrams and calculate effective field distributions for two specific cases: that of uniform sparse long-range bonds (i.e. `small world' magnets), and that of (+J/-J) random sparse long-range bonds (i.e. `small world' spin-glasses).Comment: 22 pages, LaTeX, IOP macros, eps figure

Electron waves in chemically substituted graphene

We present exact analytical and numerical results for the electronic spectra and the Friedel oscillations around a substitutional impurity atom in a graphene lattice. A chemical dopant in graphene introduces changes in the on-site potential as well as in the hopping amplitude. We employ a T-matrix formalism and find that disorder in the hopping introduces additional interference terms around the impurity that can be understood in terms of bound, semi-bound, and unbound processes for the Dirac electrons. These interference effects can be detected by scanning tunneling microscopy.Comment: 4 pages, 7 figure