153 research outputs found

    Neuroscience in Pakistan

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    Effect of Green Bonds on corporate financial performance

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    Master of Science in Business (Siviløkonom) - Nord universitet 202

    Inflation and Globalisation: A Dynamic Factor Model with Stochastic Volatility

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    National inflation rates reflect domestic and international (regional and global) influences. The relative importance of these components remains a controversial empirical issue. We extend the literature on inflation co-movement by utilising a dynamic factor model with stochastic volatility to account for shifts in the variance of inflation and endogenously determined regional groupings. We find that most of inflation variability is explained by the country specific disturbance term. Nevertheless, the contribution of the global component in explaining industrialised countries’ inflation rates has increased over time.Inflation, Dynamic Factor Model, Stochastic Volatility, Globalisation

    Patch Clamp Study of Serotonin-Gated Currents via 5-HT Type 3 Receptors by Using a Novel Approach SHAM for Receptor Channel Scanning

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    We studied 5-hydroxy tryptamine type 3 (5-HT(3)) receptors transfected in tsA-201 cell line to examine serotonin-induced whole cell currents. Using the site-directed mutagenesis technique, we individually mutated each residue in the membrane-spanning M2 segment to histidine. A high proportion of tsA-201 cells cotransfected with the cDNAs of 5-HT(3)R and CD8 produced large amplitude responses (0.5−7.0 nA) to serotonin. The dose-response curve of wild-type (WT) receptor ranging from 0.5 to 500 μmole increases its K(d) values, and V(max) of 5-HT(3)R falls at low external pH as if protonation of an acid group is enough to block the channel. Lysine at position 281, a basic residue, is more susceptible to acidification-induced blockade of the 5-HT(3)R channel. Dose-response curves of K281S (replacing lysine at the 281 position with serine) at different pH are not significantly modulated, and histidine substitutions at the three consecutive positions 293, 294, and 296 eliminate the pH block of the channel

    New Tools for Understanding Epilepsy

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    Neuroprotective Effects of Curcumin and Vitamin D3 on Scopolamine-Induced Learning-Impaired Rat Model of Alzheimer’s Disease

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    The purpose of this study was to find out the beneficial effects of curcumin and vitamin D3 in rats treated with scopolamine as to generate animal model of tauopathies, i.e., neurodegenerative disorders, including Alzheimer’s disease (AD). Abnormal phosphorylation of tau results in the transformation of normal adult tau into paired-helical-filament (PHF) tau and neurofibrillary tangles (NFTs). Our results indicated that scopolamine-treated rats exhibit increased levels of hyperphosphorylated tau protein along with PHF, and curcumin and vitamin D3 lowered the levels of PHF better than donepezil. The effect of abnormal hyperphosphorylation of tau was also detected in the hematoxylin and eosin staining of brain tissues as well as in the western blot analyses in our experimental rat models of AD. This abnormal level of hyperphosphorylated tau probably causes cognitive and memory deficit as observed in different behavioral tests on exploratory groups. Hyperphosphorylated tau may have disrupted the microtubule network in experimental rats. Signs of temporal region dementia noted during behavioral studies may be linked to the neurodegeneration and abnormal hyperphosphorylation of tau observed in our experimental animal model of AD. The curcumin and vitamin D3-treated group presented lower levels of hyperphosphorylated tau and a better behavioral response. Thus, inhibition of abnormal hyperphosphorylation of tau offers a promising therapeutic target for AD and related tauopathies

    Globalization, inflation and monetary policy

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    The thesis is aimed at investigating the implications of globalization for the conduct of monetary policy. By globalization we mean increased interdependence of national economies as reflected in greater and freer flow of goods, services, capital, and labour across national borders. In particular, our research addresses a number of important issues in the recent monetary policy and globalization debate. First, are global factors becoming important drivers of domestic inflation? Second, are global factors playing more powerful role on inflation dynamics in the sectors of an economy that are more open to trade? Third, has globalization made the job of Central Bankers more difficult? And finally, do the Central Bankers in the United States and the United Kingdom consider international factors too along with domestic factors while determining the short term interest rates? Inflation rates have been observed to be low across industrial countries since the early 1990s. The co-movements of inflation rates across countries are strikingly high. We model the co-movements of inflation rates by a global factor, regional factors and idiosyncratic component. In particular, we estimate a Dynamic Factor Model with Stochastic Volatility and find that the contribution of the global factor has increased over time in explaining the variance of inflation in OECD countries. The regional factor also gains importance in countries with strong intra-regional economic linkages potentially due to proliferation of regional trade agreements and common currency areas. In the European countries, the role of global and regional factor together dominates the country specific factor since the late 1990s. The volatility of inflation has substantially decreased over time and our modelling framework incorporates time varying volatility of inflation. We find strong positive and significant relationship between the international common factor and economic globalization. Consistent with inflation becoming a global phenomenon, co-movements of aggregate inflation between countries are observed to be high. We examine whether this is also the case for sectoral inflation, we model the co-movements in sectoral inflation as being associated with a global factor, a sector specific factor and an idiosyncratic error term. We find that the co-movements of inflation of tradable sectors are substantially greater than the co-movements in non-tradable sectors which implies that the greater co-movements of inflation can be attributed to increased trade global integration of product markets. To test this, we attempt to find empirical relationship between the estimated common factor in sectors and openness to trade measured as import penetration. A positive relationship is found between the estimated sector specific common factors and import penetration. Given our earlier chapters identify important global dimension to aggregate and sectoral inflation, does this matter for monetary policy? The implication of globalization for monetary policy in the United States and the United Kingdom are examined by estimating monetary policy reaction function for these advanced economies over the sample period 1985-2010. We also consider time variations in these reaction function by estimating over a sub-sample of 1992-2010 for the United Kingdom and the Greenspan-Bernanke Era for the United States. We estimate the policy reaction function with domestic and global inflation and output gaps and with the component of domestic inflation and output gap that is not related to global variations. The policy reaction function augmented with foreign variables such as real effective exchange rate and foreign interest rate is also estimated. We use measures of inflation based on GDP deflator, CPI and inflation expectations. We find that the Federal Reserve responds to global inflation only in the full sample and to global as well as the country specific inflation in the second sub-sample (Greenspan-Bernanke Era). This may imply strong commitment of the Federal Reserve to the goal of ``price stability'' during Greenspan-Bernanke Era. The Bank of England responds to global inflation along with the country specific inflation. The international factors such as the real effective exchange rate changes (depreciation) and foreign interest rates have significant and positive effect on policy rates

    Breast Feeding Remains a Strong Protection against Infant Infections.

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    Background: Breast feeding prevents infections in infants. Those who are partially or never breast-fed and receiving bottle feeds are at higher risk of infections as compared to exclusive breast-fed infants. The objectives of this study were to record the effect of exclusive breast feeding versus partial and never breast feeding on infections in infants and also to find an association of infection with type of feed, gestation and vaccination status in infants till six months of age.Material and Methods: A total of 500 Infants were included in this cross-sectional study. Information regarding pattern of feeding and infections was obtained by verbal interview of mother and the questionnaire was filled by the study physician. The outcome evaluated was infections in infants till one year of age. Categorical comparisons were made using chi square test. A ‘p’ value < 0.05 was considered statistically significant.Results: Out of 500 infants, 59.4% were males. About 59.6% were exclusively breast-fed till 6 months of age, 31.2% were partially breast-fed and 9.2% were never breast-fed. In exclusively breast-fed group, 29.5% infants reported infections as compared to 40.4% in partial breast-fed group and 65.2% in never breast-fed infants (P < 0.000). Similarly, 40.6% of infants in exclusively breast-fed group, 55.1% in partial breast feed and 58.7% in the never breast-fed reported infections in 4-6 months of age, which was statistically significant (P = 0.003). There was no significant difference in infection rates among the three study groups in 7-9 (P=0.192) and 10 -12 months (P=0.42) of age.Conclusions: Exclusive breast feeding till six months of age significantly reduces the risk of infections in infancy

    Trends in Earning Management (EM) Practices: A Cross Country and Industrial Analysis

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    This paper analyzes the trends in earnings management (EM) practices of 500 non-financial firms across 8 major industries operating in both developing and developed economies for the period 2008-2017. It significantly contributes to the literature by identifying the country-specific, industry-specific, and over the time trends in accrual and real earnings management practices prevailing in the non-financial sector of both developed and developing economies of the world. EM trends are analyzed across countries, across industries, and over the sample period. The sample consists of 500 non-financial firms from 8 different industries of 22 developed and developing economies for the period 2007-2018. Accrual and real earnings management are alternatively used in the non-financial sector across the world. This study uses the Modified Jones Model (Dechow et al., 1996) and the Roychowdhury model (2006) to estimate accrual and real earnings management. The analysis of variance (ANOVA) is used to examine the mean differences between countries and industries as well as over the time differences. The country-wise analysis concludes that Pakistan is on the top of the list in managing earnings followed by Canada, particularly in accrual-based earnings management. It may be attributed to poor accounting standards and regulatory frameworks. The industry-wise analysis shows that the mining industry, characterized by high dependency on capital markets and the uncertainty associated with the prospects of mineral reserves, is highly involved in EM. Finally, the year-wise analysis determines that the year 2009 was highly escorted with accrual and real earnings management practices, which may be the result of the global financial crisis of 2007-2008. The findings imply that the policymakers of developing economies should strongly emphasize improving the general macroeconomic environment of the economy by controlling inflation, improving law and order conditions, and ensuring political stability. Additionally, the findings have potential implications for corporate managers while formulating strategies to restrict them from EM that may diminish both firm value and the economy
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