Reviews

Michal Kokowski, Copernicus’s Originality: Towards Integration of Contemporary Copernican Studies (Warsaw: Wydawnictwa Ihn Pan, 2004). 314 pp. pb. ISBN 83‐86062‐27‐4. Sharon E. Kingsland, The Evolution of American Ecology 1890–2000 (Baltimore: Johns Hopkins University Press, 2005). 313 pp. hc. $50. ISBN 0‐8018‐8171‐4. Graeme J.N. Gooday. The Morals of Measurement: Accuracy, Irony, and Trust in Late Victorian Electrical Practice (Cambridge: Cambridge University Press, 2004). xxv, 285 pp. hc. £55. ISBN 0‐521‐43098. Joan Vernet; Ramon Parés (eds.), La Ciència en la Història del Països Catalans. Vol. 1. Dels Àrabs al Renaixement (Valencia: University of Valencia, 2004). 630 pp. hc. €50. ISBN 84‐370‐ 6047‐8. Giuliano Pancaldi, Volta. Science and Culture in the Age of Enlightenment (Princeton and Oxford: Princeton University Press, 2003). 381 pp. hc. £32.50. ISBN 0‐691‐09685‐6. Wolfgang Lefèvre; Jürgen Renn; Urs Schoepfin (eds.), The Power of Images in Early Modern Science (Basel: Birkhäuser Verlag, 2003). 320 pp. pb. CHF 184, € 118. ISBN 3‐7643‐2434‐1. Olivier Darrigol, Worlds of Flow: A History of Hydrodynamics from the Bernoullis to Prandtl (Oxford: Oxford University Press, 2005). 356 pp. hc. L35.00. ISBN 0‐19‐856843‐6. Ad Meskens, Joannes della Faille s.j.: Mathematics, Modesty and Missed Opportunities (Brussel: Institut Historique Belge de Rome, 2005). 175 pp. hc. ISBN 90‐74461‐53‐0. Aant Elzinga; Torgny Nordin; David Turner; Urban Wråkberg (eds.), Antarctic Challenges. Historical and Current Perspectives on Otto Nordenskjöld’s Antartic Expedition 1901–1903 (Göteborg: Royal Society of Arts and Sciences, 2004). 330 pp. hc. $93. ISBN 91‐85252‐64‐6. Klaus‐Heinrich Peters, Schönheit, Exaktheit, Wahrheit: Der Zusammenhang von Mathematik und Physik am Beispiel der Geschichte der Distributionen (Berlin: GNT‐Verlag, 2005). 272 pp. pb. € 32.00. ISBN 3‐928186‐74‐4.     

Use of remotely sensed and ancillary data for estimating forest gross primary productivity in Italy

The current paper describes the development and testing of a procedure which can use widely available remotely sensed and ancillary data to assess large-scale patterns of forest productivity in Italy. To reach this objective a straightforward model (C-Fix) was applied which is based on the relationship between photosynthetically active radiation absorbed by plant canopies and relevant gross primary productivity (GPP). The original C-Fix methodology was improved by using more abundant ancillary information and more efficient techniques for NDVI data processing. In particular, two extraction methods were applied to NDVI data, derived from two sensors (NOAA-AVHRR and SPOT-VGT) to feed C-Fix. The accuracy of the model outputs was assessed through comparison with annual and monthly values of forest GPP derived from eight eddy covariance flux towers. The results obtained indicated the superiority of SPOT-VGT over NOAA-AVHRR data and a higher efficiency of the more advanced NDVI extraction method. Globally, the procedure was proved to be of easy and objective implementation and allowed the evaluation of mean productivity levels of existing forests on the national scale.     

Apoptogenic effect of the lipophilic <i>o</i>-naphthoquinone CG 10-248 on rat hepatocytes: light and electron microscopy studies

CG 10-248 (3,4-dihydro-2,2-dimethyl-9-chloro-2H-naphtho[1,2b]pyran- 5,6-dione; CG-NQ), a β-lapachone analogue, modified the ultrastructure of rat hepatocytes, as demonstrated by light and electron microscopy. After 4 h incubation with 100 µM CG-NQ, the following effects were observed: (a) nuclear chromatin condensation; (b) chromatin fragmentation; (c) displacement of mitochondria, concentrated around the nucleus; (d) disruption or expansion of mitochondrial outer or inner membranes, respectively; (e) displacement and alteration of endoplasmic reticulum (rough and smooth); (f) decrease of microvilli; (g) blebbing of plasma membrane and production of apoptotic bodies formed by folding of plasma membrane fragments around mitochondria or peroxysomes; and (h) production of hydrogen peroxide. Expression of such effects varied according to hepatocyte samples and taken together strongly support an apoptotic action of CG-NQ dependent on “reactive oxygen species”.     

Tuning the 1H NMR Paramagnetic Relaxation Enhancement and Local Order of [Aliquat]+-Based Systems Mixed with DMSO

Understanding the behavior of a chemical compound at a molecular level is fundamental, not only to explain its macroscopic properties, but also to enable the control and optimization of these properties. The present work aims to characterize a set of systems based on the ionic liquids [Aliquat][Cl] and [Aliquat][FeCl4] and on mixtures of these with different concentrations of DMSO by means of 1H NMR relaxometry, diffusometry and X-ray diffractometry. Without DMSO, the compounds reveal locally ordered domains, which are large enough to induce order fluctuation as a significant relaxation pathway, and present paramagnetic relaxation enhancement for the [Aliquat][Cl] and [Aliquat][FeCl4] mixture. The addition of DMSO provides a way of tuning both the local order of these systems and the relaxation enhancement produced by the tetrachloroferrate anion. Very small DMSO volume concentrations (at least up to 1%) lead to enhanced paramagnetic relaxation without compromising the locally ordered domains. Larger DMSO concentrations gradually destroy these domains and reduce the effect of paramagnetic relaxation, while solvating the ions present in the mixtures. The paramagnetic relaxation was explained as a correlated combination of inner and outer-sphere mechanisms, in line with the size and structure differences between cation and anion. This study presents a robust method of characterizing paramagnetic ionic systems and obtaining a consistent analysis for a large set of samples having different co-solvent concentrations.     

Perfluorinated compounds in food: a global perspective

Perfluorinated compounds (PFCs) are resistant to breakdown and are turning up in unexpected places around the world, becoming emerging food contaminants. Although these chemicals have been used in countless products since the 1950s, they have been subject to little control until now. There is still an insufficient knowledge of their sources, occurrence, and hazards for food safety decision making. This article provides a comprehensive review of the food contamination levels and dietary intake risks posed by PFCs, as well as the specific methods developed for their determination. It is based on the evaluation of the published literature between 2004 and the beginning of 2010, with special emphasis on those reports of the last two years and in the examination of the growing body of studies on the exposure assessment and food occurrence of PFCs. The current state-of-the art and future perspectives in extraction, clean-up, detection, identification, confirmation, and quantification highlighting the advantages and limitations of each technique have been summarized. How much is known about the sources and pathways of food web and human exposure, which is needed to control and manage the release of these emerging toxic contaminants, has also been explained.     

Analysis of development rates of Sitophilus oryzae (L.) in five cereals of the genus Triticum

A route to the analysis and comparison of experimental data of Sitophilus oryzae (L.) development rate at a fixed temperature and relative humidity, for five different cereals (Triticum aestivum, T. dicoccum, T. durum, T. monococcum, T. spelta) is prosposed. To describe cumulative curves for developmental rate, we suggest the use of a simple exponential model. The model accounts for the evolution of a given system from a stable state (e.g. no adults emerged) to another stable state (e.g. all adults emerged). The main advantage of our approach lies in the fact that no fitting parameters are required. The only parameters required can be measured directly from the experimental data. Different developmental behaviour in accordance with the cereal supplied corresponded to different survival strategies on the different foods. In all the cases examined, the simulated data reached a confidence level of over 95%.     

Analysis of the Role of FRMD5 in the Biology of Papillary Thyroid Carcinoma

Background: Thyroid carcinoma (TC) is the most common endocrine system malignancy, and papillary thyroid carcinoma (PTC) accounts for >80% of all TC cases. Nevertheless, PTC pathogenesis is still not fully understood. The aim of the study was to elucidate the role of the FRMD5 protein in the regulation of biological pathways associated with the development of PTC. We imply that the presence of certain genetic aberrations (e.g., BRAF V600E mutation) is associated with the activity of FRMD5. Methods: The studies were conducted on TPC1 and BCPAP (BRAF V600E) model PTC-derived cells. Transfection with siRNA was used to deplete the expression of FRMD5. The mRNA expression and protein yield were evaluated using RT-qPCR and Western blot techniques. Proliferation, migration, invasiveness, adhesion, spheroid formation, and survival tests were performed. RNA sequencing and phospho-kinase proteome profiling were used to assess signaling pathways associated with the FRMD5 expressional status. Results: The obtained data indicate that the expression of FRMD5 is significantly enhanced in BRAF V600E tumor specimens and cells. It was observed that a drop in intracellular yield of FRMD5 results in significant alternations in the migration, invasiveness, adhesion, and spheroid formation potential of PTC-derived cells. Importantly, significant divergences in the effect of FRMD5 depletion in both BRAF-wt and BRAF-mutated PTC cells were observed. It was also found that knockdown of FRMD5 significantly alters the expression of multidrug resistant genes. Conclusions: This is the first report highlighting the importance of the FRMD5 protein in the biology of PTCs. The results suggest that the FRMD5 protein can play an important role in controlling the metastatic potential and multidrug resistance of thyroid tumor cells.     

A review of optical and thermal transfer fluids used for optical adaptation or beam‐splitting in concentrating solar systems

There are a wide variety of solar thermal, photovoltaic, and hybrid photovoltaic–thermal concentrator systems and concepts that use liquids for optical adaptation and heat transfer. Depending on the functional purpose of the fluid: heat transfer, optical adaptation, spectral filtering, or a combination of these applications, different fluid properties are required. This review studies actively cooled solar concentrators and their associated requirements for liquids. The most suitable candidate fluids available in the market are assessed according to their properties and applications, with a special emphasis on fluid toxicity and long‐term performance. Copyright © 2012 John Wiley & Sons, Ltd.