Frédérique Aït-Touati, Fictions of the Cosmos: Science and Literature in the Seventeenth Century

Oxford French Literature Professor Frédérique Aït-Touati’s book Fictions of the Cosmos: Science and Literature in the Seventeenth Century is packed full of information—perhaps too packed with information—about all sorts of interesting subjects relating to the interplay of science and literature in the seventeenth century. The book explores literary aspects of science writing, the history of astronomy and optics, and the history of the relationship between fiction and knowledge, especially in the early modern period. Her overall aim in this exploration is to instruct us on the value of fiction in science and the value of science in fiction. To accomplish this, she focuses much of her book around the theme of cosmological voyages written by the likes of Johannes Kepler, Francis Godwin, John Wilkins, Cyrano de Bergerac, Robert Hooke, Margaret Cavendish, Christiaan Huygens, and Bernard le Bovier de Fontenelle. She then utilizes her expertise in literary theory and her studies in the history and philosophy of science to explicate the various literary techniques used in their works

An Economic Analysis of the Rise in Franchise Values in the Four Major North American Sports Leagues from 2008-2016

North American professional sports franchise values have been growing rapidly over the last 10 years, leading some to wonder how this rise might mirror previous economic booms such as those of the internet and housing sectors, and thus impact the future of the sport industry. To investigate this phenomenon, financial and other team-specific data was acquired from Forbes, while metropolitan area statistics were mostly gathered from the Bureau of Economic Analysis and the U.S. Census. The results of this study showed that revenue, metropolitan area population and GDP, multiple teams in the same metro area and the same league, and year that a venue opened (or was renovated) have a significant effect on team value. Additionally, a large “bubble” in team prices for 2016 was evident throughout, helping explain the drastic rise in prices since 2014. Revenue, metroGDP, and year=2016 were all positively correlated with franchise value, while metroteamssame, metropop, and venueyropened were all negatively correlated Since professional sports is a private industry, the bubble is most likely driven by external factors such as the rise in TV and broadcasting revenue, and thus does not seem to be in danger of bursting. As such, it will be interesting to see how new TV deals increase these valuations even further. Additionally, one can theorize how recent and forthcoming sales transactions might continue to “set the market” higher and higher, as typically occurs in other industries throughout the economy

Recent results of exenatide use as adjunctive therapy in the treatment of patients with type 2 diabetes

Exenatide is a GLP-1 receptor agonist approved for use in type 2 diabetes mellitus. In clinical trials, significant reductions in serum glucose and weight were demonstrated for exenatide with primary glycemic effects of the twice daily formulation on prandial glucose control. In this paper, we review recent research with exenatide as adjunctive therapy in type 2 diabetes mellitus. In particular, studies demonstrate ongoing benefit on glycemic control and weight reduction with continued therapy up to 82 weeks duration and efficacy as adjunctive therapy for patients taking metformin, thiazolidinediones, and/or a sulfonylurea and as compared to sitagliptin and various insulin formulations. Compared to insulin, exenatide likely has greatest benefit for those patients who are overweight or who need improved prandial glucose control. The new long-acting release formulation of exenatide has demonstrated slightly improved efficacy compared to the twice daily formulation as well as a reduction in gastrointestinal side effects. Emerging research is further exploring novel benefits of exenatide as adjunctive DM therapy, effects on prandial glycemic control, markers of hepatic inflammation, alternative dosage forms including intra-nasal administration, and effects on beta cell function

Protein sliding and hopping kinetics on DNA

Using Monte-Carlo simulations, we deconvolved the sliding and hopping kinetics of GFP-LacI proteins on elongated DNA from their experimentally observed seconds-long diffusion trajectories. Our simulations suggest the following results: (1) in each diffusion trajectory, a protein makes on average hundreds of alternating slides and hops with a mean sliding time of several tens of ms; (2) sliding dominates the root mean square displacement of fast diffusion trajectories, whereas hopping dominates slow ones; (3) flow and variations in salt concentration have limited effects on hopping kinetics, while in vivo DNA configuration is not expected to influence sliding kinetics; furthermore, (4) the rate of occurrence for hops longer than 200 nm agrees with experimental data for EcoRV proteins

A multi-center population-based case–control study of ovarian cancer in African-American women: the African American Cancer Epidemiology Study (AACES)

Abstract: Background: Ovarian cancer (OVCA) is the leading cause of death from gynecological cancer, with poorer survival for African American (AA) women compared to whites. However, little is known about risk factors for OVCA in AA. To study the epidemiology of OVCA in this population, we started a collaborative effort in 10 sites in the US. Here we describe the study and highlight the challenges of conducting a study of a lethal disease in a minority population. Methods: The African American Cancer Epidemiology Study (AACES) is an ongoing, population-based case–control study of OVCA in AA in 10 geographic locations, aiming to recruit 850 women with invasive epithelial OVCA and 850 controls age- and geographically-matched to cases. Rapid case ascertainment and random-digit-dialing systems are in place to ascertain cases and controls, respectively. A telephone survey focuses on risk factors as well as factors of particular relevance for AAs. Food-frequency questionnaires, follow-up surveys, biospecimens and medical records are also obtained. Results: Current accrual of 403 AA OVCA cases and 639 controls exceeds that of any existing study to date. We observed a high proportion (15%) of deceased non-responders among the cases that in part is explained by advanced stage at diagnosis. A logistic regression model did not support that socio-economic status was a factor in advanced stage at diagnosis. Most risk factor associations were in the expected direction and magnitude. High BMI was associated with ovarian cancer risk, with multivariable adjusted ORs and 95% CIs of 1.50 (0.99-2.27) for obese and 1.27 (0.85- 1.91) for morbidly obese women compared to normal/underweight women. Conclusions: AACES targets a rare tumor in AAs and addresses issues most relevant to this population. The importance of the study is accentuated by the high proportion of OVCA cases ascertained as deceased. Our analyses indicated that obesity, highly prevalent in this population (>60% of the cases), was associated with increased OVCA risk. While these findings need to be replicated, they suggest the potential for an effective intervention on the risk in AAs. Upon completion of enrollment, AACES will be the largest epidemiologic study of OVCA in AA women

Eukaryotic systems broaden the scope of synthetic biology

Synthetic biology aims to engineer novel cellular functions by assembling well-characterized molecular parts (i.e., nucleic acids and proteins) into biological “devices” that exhibit predictable behavior. Recently, efforts in eukaryotic synthetic biology have sprung from foundational work in bacteria. Designing synthetic circuits to operate reliably in the context of differentiating and morphologically complex cells presents unique challenges and opportunities for progress in the field. This review surveys recent advances in eukaryotic synthetic biology and describes how synthetic systems can be linked to natural cellular processes in order to manipulate cell behavior and to foster new discoveries in cell biology research

Bacterial Communities in the Sediments of Dianchi Lake, a Partitioned Eutrophic Waterbody in China

Bacteria play an important role in the decomposition and cycling of a variety of compounds in freshwater aquatic environments, particularly nutrient-rich eutrophic lakes. A unique Chinese eutrophic lake - Dianchi - was selected for study because it has two separate and distinct basins, Caohai with higher organic carbon levels and Waihai with lower organic carbon levels. Sediment bacterial communities were studied in the two basins using samples collected in each season from June 2010 to March 2011. Barcoded pyrosequencing based on the 16 S rRNA gene found that certain common phyla, Proteobacteria, Bacteroidetes, Firmicutes and Chloroflexi, were dominant in the sediments from both basins. However, from the class to genus level, the dominant bacterial groups found in the sediments were distinct between the two basins. Correlation analysis revealed that, among the environmental parameters examined, total organic carbon (TOC) accounted for the greatest proportion of variability in bacterial community. Interestingly, study results suggest that increasing allochthonous organic carbon could enhance bacterial diversity and biomass in the sediment. In addition, analysis of function genes (amoA and nosZ) demonstrated that ammonia-oxidizing bacteria (AOB) were dominant in sediments, with 99% belonging to Nitrosomonas. Denitrifying bacteria were comparatively diverse and were associated with some cultivatable bacteria

Impact of plants on the diversity and activity of methylotrophs in soil

Background Methanol is the second most abundant volatile organic compound in the atmosphere, with the majority produced as a metabolic by-product during plant growth. There is a large disparity between the estimated amount of methanol produced by plants and the amount which escapes to the atmosphere. This may be due to utilisation of methanol by plant-associated methanol-consuming bacteria (methylotrophs). The use of molecular probes has previously been effective in characterising the diversity of methylotrophs within the environment. Here, we developed and applied molecular probes in combination with stable isotope probing to identify the diversity, abundance and activity of methylotrophs in bulk and in plant-associated soils. Results Application of probes for methanol dehydrogenase genes (mxaF, xoxF, mdh2) in bulk and plant-associated soils revealed high levels of diversity of methylotrophic bacteria within the bulk soil, including Hyphomicrobium, Methylobacterium and members of the Comamonadaceae. The community of methylotrophic bacteria captured by this sequencing approach changed following plant growth. This shift in methylotrophic diversity was corroborated by identification of the active methylotrophs present in the soils by DNA stable isotope probing using 13C-labelled methanol. Sequencing of the 16S rRNA genes and construction of metagenomes from the 13C-labelled DNA revealed members of the Methylophilaceae as highly abundant and active in all soils examined. There was greater diversity of active members of the Methylophilaceae and Comamonadaceae and of the genus Methylobacterium in plant-associated soils compared to the bulk soil. Incubating growing pea plants in a 13CO2 atmosphere revealed that several genera of methylotrophs, as well as heterotrophic genera within the Actinomycetales, assimilated plant exudates in the pea rhizosphere. Conclusion In this study, we show that plant growth has a major impact on both the diversity and the activity of methanol-utilising methylotrophs in the soil environment, and thus, the study contributes significantly to efforts to balance the terrestrial methanol and carbon cycle