Crystallization and preliminary structural analysis of the giant haemoglobin from Glossoscolex paulistus at 3.2 angstrom

Glossoscolex paulistus is a free-living earthworm encountered in south-east Brazil. Its oxygen transport requirements are undertaken by a giant extracellular haemoglobin, or erythrocruorin (HbGp), which has an approximate molecular mass of 3.6 MDa and, by analogy with its homologue from Lumbricus terrestris (HbLt), is believed to be composed of a total of 180 polypeptide chains. In the present work the full 3.6 MDa particle in its cyanomet state was purified and crystallized using sodium citrate or PEG8000 as precipitant. The crystals contain one-quarter of the full particle in the asymmetric unit of the I222 cell and have parameters of a = 270.8 angstrom, b = 320.3 angstrom and c = 332.4 angstrom. Diffraction data were collected to 3.15 angstrom using synchrotron radiation on beamline X29A at the Brookhaven National Laboratory and represent the highest resolution data described to date for similar erythrocruorins. The structure was solved by molecular replacement using a search model corresponding to one-twelfth of its homologue from HbLt. This revealed that HbGp belongs to the type I class of erythrocruorins and provided an interpretable initial electron density map in which many features including the haem groups and disulfide bonds could be identified.

Qualidade de vida e aspectos psicossociais da síndrome dos ovários policísticos: um estudo quali-quantitativo

OBJETIVOS: Avaliar a qualidade de vida das mulheres com síndrome dos ovários policísticos (SOP) e compreender a experiência vivida por essas mulheres diante dos sintomas que apresentam. MÉTODOS: Este estudo compreendeu duas abordagens metodológicas - quantitativa e qualitativa, de forma complementar. Foi avaliada a qualidade de vida de 213 mulheres (abordagem quantitativa) por meio do SF-36, sendo 109 com SOP (Grupo Caso: 26,8±5,4 anos) e 104 mulheres saudáveis (Grupo Controle: 23,9±6,7 anos). A análise estatística compreendeu a utilização dos testes t de Student e qui-quadrado, além dos testes de correlação de Pearson. O nível de significância adotado foi de 5%. Das mulheres do Grupo SOP, 15 participaram do estudo qualitativo, tendo sido entrevistadas mediante uso de roteiro semiestruturado. Os dados qualitativos foram analisados por meio da técnica análise de conteúdo temática categorial. RESULTADOS: Mulheres com SOP apresentaram comprometimento na qualidade de vida quando comparadas ao Grupo Controle (capacidade funcional: 76,5±20,5 e 84,6±15,9, respectivamente; aspectos físicos: 56,4±43,3 e 72,6±33,3; estado geral de saúde: 55,2±21,0 e 62,5±17,2; vitalidade: 49,6±21,3 e 55,3±21,3; aspectos sociais: 55,3±32,4 e 66,2±26,7; aspectos emocionais: 34,2±39,7 e 52,9±38,2; saúde mental: 50,6±22,8 e 59,2±20,2). Em relação aos dados qualitativos, a análise temática categorial aponta que sentimentos de "anormalidade", tristeza, medo e ansiedade estiveram associados aos principais sintomas da SOP: hirsutismo, irregularidade menstrual, infertilidade e obesidade. Esses sintomas repercutiram na vida social, na esfera profissional e no relacionamento conjugal dessas mulheres. CONCLUSÃO: A SOP compromete a qualidade de vida das mulheres, levando-as a se sentirem diferentes das outras mulheres. Por causa disso, a mulher com SOP não necessita apenas de tratamento médico para as repercussões reprodutivas, estéticas e metabólicas, mas de atendimento multiprofissional.

Modeling the monetary policy reaction function of the colombian central bank

This paper proposes a simple Ordered Probit model to analyse the monetary policy reaction function of the Colombian Central Bank. There is evidence that the reaction function is asymmetric, in the sense that the Bank increases the Bank rate when the gap between observed inflation and the inflation target (lagged once) is positive, but it does not reduce the Bank rate when the gap is negative. This behaviour suggests that the Bank is more interested in fulfilling the announced inflation target rather than in reducing inflation excessively. The forecasting performance of the model, both within and beyond the estimation period, appears to be particularly good.

International propagation of shocks: an evaluation of contagion effects for some Latin American countries

In this paper we analyze the spread of shocks across assets markets in eight Latin American countries. First, we measure the extent of markets reactions with the Principal Components Analysis. And second, we investigate the volatility of assets markets based in ARCH-GARCH models in function of the principal components retained in the first stage. Our results do not support the existence of financial contagion, but of interdependence in most of the cases and a slight increase in the sensibility of markets to recent shocks.

Do Foreign Currency Deposits Promote or Deter Financial Development in Low-Income Countries? An Empirical Analysis of Cross-Country Data

Foreign currency deposits (FCD) are prevalent in many low-income developing countries, but their impact on bank lending has rarely been examined. An examination of cross-country data indicates that a higher proportion of FCD in total deposits is associated with growth in private credit only in inflationary circumstances (over 24 percent of the annual inflation rate). FCD can lead to a decline in private credit below this threshold level of inflation. Given that FCD exhibit persistence, deregulating them in low-income countries may do more harm than good on financial development in the long term, notably after successful containment of inflation.

An empirical analysis of the money demand function in India

This paper empirically analyzes India’s money demand function during the period of 1980 to 2007 using monthly data and the period of 1976 to 2007 using annual data. Cointegration test results indicated that when money supply is represented by M1 and M2, a cointegrating vector is detected among real money balances, interest rates, and output. In contrast, it was found that when money supply is represented by M3, there is no long-run equilibrium relationship in the　money demand function. Moreover, when the money demand function was estimated using　dynamic OLS, the sign onditions of the coefficients of output and interest rates were found to be　consistent with theoretical rationale, and statistical significance was confirmed when money supply was represented by either M1 or M2. Consequently, though India’s central bank presently uses M3 as an indicator of future price movements, it is thought appropriate to focus on M1 or M2, rather than M3, in managing monetary policy.

Briefe, die neueste Litteratur betreffend. Geschrieben in den Jahren 1759 bis 1763. Vier und zwanzig Theile nebst doppelten Registern.

The chief contributors besides C. F. Nicolai, the editor, were Lessing, Moses Mendelssohn, Thomas Abbt, F. G. Resewitz, and Friedrich Grillo.

Iowa Developments, November 2002, Vol.11 No.4

Report of iowa development for Economic Development

A comparison of in vivo 13C MR brain glycogen quantification at 9.4 and 14.1 T.

The high molecular weight and low concentration of brain glycogen render its noninvasive quantification challenging. Therefore, the precision increase of the quantification by localized (13) C MR at 9.4 to 14.1 T was investigated. Signal-to-noise ratio increased by 66%, slightly offset by a T(1) increase of 332 ± 15 to 521 ± 34 ms. Isotopic enrichment after long-term (13) C administration was comparable (≈ 40%) as was the nominal linewidth of glycogen C1 (≈ 50 Hz). Among the factors that contributed to the 66% observed increase in signal-to-noise ratio, the T(1) relaxation time impacted the effective signal-to-noise ratio by only 10% at a repetition time = 1 s. The signal-to-noise ratio increase together with the larger spectral dispersion at 14.1 T resulted in a better defined baseline, which allowed for more accurate fitting. Quantified glycogen concentrations were 5.8 ± 0.9 mM at 9.4 T and 6.0 ± 0.4 mM at 14.1 T; the decreased standard deviation demonstrates the compounded effect of increased magnetization and improved baseline on the precision of glycogen quantification.