Oilfield Review Winter 2014/2015: 26, no. 4. Copyright © 2015 Schlumberger. FMI is a mark of Schlumberger. Sediments undergo several modifications to become the source rocks, reservoirs and seals that generate and contain petroleum reserves. The changes that occur between deposition and lithification, collectively known as diagenesis, include the processes of compaction, cementation, dissolutio...

Whether a morning cup of joe keeps your partner happily alert or nervously jittery may depend on how much caffeine is consumed. While not definitively causal, a number of studies have shown a dose-dependent relationship between excess caffeine consumption and stress, anxiety, and depression. This relationship?s direction could go either or both ways; that is, excess caffeine consumption might e...

The reasons for the molecular heterogeneity of connexin channels in vivo remain unclear. Functional replacement of one connexin gene with another has now revealed unexpected phenotypes and shows that cellular homeostasis depends not simply on cell-cell communication but also on the correct types of connexin.

TO THE EDITOR: In a recent paper by Higashida et al. (5), the authors report that very large doses of antioxidant vitamins do not prevent the exercise-induced adaptive responses of muscle mitochondria, GLUT4, and insulin action to exercise. As clearly stated in the paper, their data disagree with those reported by three independent research groups from Germany (14), Australia (17), and Spain (4...

Using data from a large German commercial bank, this paper focuses on three key issues in order to analyze the extent of financial advice in individual portfolios. First, we investigate whether collaboration with financial advisors attains to better performing portfolios. Second, we examine the effects of financial advisors on household investment mistakes. Third, we analyze whether accounts ru...

Neutrophils need just enough copies of a gene for an antibody-binding receptor, say Willcocks et al. (page 1573). Whereas too few copies can contribute to lupus, too many can predispose to vasculitis. Cells can have as many as four copies of this gene, FCGR3B, which encodes the FcγRIIIb receptor, but some lupus patients have fewer than two. Willcocks et al. now find that this scarcity leads to ...

struck with the complexity of the relationship between the frequency, type and duration of apnea, the degree of arterial desaturation, and the type and incidence of cardiac dysrhythmias. Recent investigations have demonstrated quite different relationships between arterial desaturation associated with apnea, and concomitant ventricular and supraventricular arrhythmias. Guilleminault et aP found...

Children encounter technology constantly at home and in school. Television, DVDs, video games, the Internet, and smart phones all play a formative role in children's development. The term "technology" subsumes a large variety of somewhat independent items, and it is no surprise that current research indicates causes for both optimism and concern depending upon the content of the technology, the...

The pending challenge to section 5 of the Voting Rights Act insists the statute is no longer necessary. Should the Supreme Court agree, its ruling is likely to reflect the belief that section 5 is not only obsolete but that its requirements do more harm today than the condition it was crafted to address. In this Essay, Professor Ellen D. Katz examines why the Court might liken section 5 to a de...

Whether a morning cup of joe keeps your partner happily alert or nervously jittery may depend on how much caffeine is consumed. While not definitively causal, a number of studies have shown a dose-dependent relationship between excess caffeine consumption and stress, anxiety, and depression. This relationship?s direction could go either or both ways; that is, excess caffeine consumption might e...