196,595 research outputs found
A hipertrofia do coração : e o augmento da tensão do sangue
No full textAção da nitro-clychirina na atrophia dos rins, pelo professor M. J. Rossbach, de Iena (Tradução especialmente para a Gazeta Médica da Bahia, pelo Dr. Tillemont Fontes
Reference materials and methods in environmental and biochemical research : report on a bilateral cooperation between the Jozef Stefan Institute, Ljubljana, and the KFA Jülich
No full textThe initiative for this fruitful bilateral cooperation goes back on an agreement between Prof. L. Kosta* from IJS and Prof H. W. Nürnberg#, ICH-4, KFA-Jülich. In 1984 both formulated a proposal to exploit the potential of nuclear analytical, electrochemical,and spectrometric techniques for accurate and precise analytical data in biological tissue and organs. Studies related to the assessment of risk to population exposed to industrial emissions was focussed already but the explicit implication of environmentally important research and surveiance programs within the duties of environmental specimen banking was introduced by Dr. Markus Stoeppler in the final version of the first project description. Since then the cooperative efforts were closely related to quality control of analytical results in referencematerials from the German Environmental specimen Bank (ESB) in Jülich, the implementation of more elements in the characterization work and speciation of mercury in environmental and ESB materials. The project lasted for six years (1.1.198631.12.1991)and the following scientists actively participated: From the KFA: Dr. M. Stoeppler, Dr. M. Rossbach, Dr. S. Padberg, DI. K. May From the IJS: Prof. P. Stegnar, Dr. A.R. Byrne, Dr. M. Horvat, Dr. M. Dermelj, Mrs. V. Stibilj. Although this project was formally terminated at the end of 1991 afollow-up program under the running title " Development, validation, and application of NAA and speciation methods in biological materialsll between the same institutions was initiated and will in principle continue the rather effective approach forexchange of experience and joint experiments in one or the other participating laboratory
Bryozoa diversity and abundance in Phyllophora crispa (Rhodophyta) mats and Posidonia oceanica meadows near Giglio Island (Tyrrhenian Sea, Italy)
No full textDataset on the epibenthic abundance of Bryozoa on P. crispa and P. oceanica habitats in the NW Mediterranean Sea (Giglio Island, Italy). Samples were obtained via SCUBA diving in summers 2018 and 2019 and analyzed by microscopic determination and counting of specimens. Sampling was part of a larger project on the diversity of the epiphytic invertebrate community on P. crispa mats in the area. The dataset includes details on the sampling efforts, diversity indices (Shannon (H'), Pielou (J')), and density of colonies m-². The numbers of individuals per family were counted on the subsamples. Densities of bryozoa (Dens) were extrapolated using wet weights of the sub- and main sample, as well as the measured surface area of the subsample. Detailed descriptions of the calculations can be found in the corresponding publication (Rossbach et al. (in review))
A Tide of Change: Stories of Marine Conservation Success
No full textSusann Rossbach from Red Sea Global, Lead Author for Saudi Arabia's Frontiers Planet Prize winning paper, presents compelling evidence that marine conservation success is not only possible, it’s already happening. By analyzing 217 verified case studies, her research reveals the social, ecological, and institutional ingredients behind effective ocean stewardship. Rossbach highlights the power of local engagement, multi-stakeholder collaboration, and targeted action against high-impact pressures like overfishing and pollution, reframing marine conservation as a dynamic, hopeful frontier in achieving global sustainability and staying within planetary boundaries.
The thought piece can be found on the Frontiers Planet Prize website and can be accessed via this link.
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Light-dependent calcification in Red Sea giant clam Tridacna maxima
No full textTropical giant clams of the subfamily Tridacninae, including the species Tridacna maxima, are unique among bivalves as they live in a symbiotic relationship with unicellular algae and generally function as net photoautotrophs. Light is therefore crucial for these species to thrive. Here we examine the light dependency of calcification rates of T. maxima in the central Red Sea as well as the patterns of its abundance with depth in the field. Red Sea T. maxima show the highest densities at a depth of 3 m with 0:82 ± 0:21 and 0:11±0:03 individuals m-2 (mean ± SE) at sheltered and exposed sites, respectively. Experimental assessment of net calcification (μmol CaCO3 cm-2 h-1) and gross primary production (μmol O2 cm-2 h-1) under seven light levels (1061, 959, 561, 530, 358, 244, and 197 μmol quanta m-2 s-1) showed net calcification rates to be significantly enhanced under light intensities corresponding to a water depth of 4 m (0:65 ± 0:03 μmol CaCO3 cm-2 h-1; mean ± SE), while gross primary production was 2:06±0:24 μmol O2 cm-2 h-1 (mean ± SE). We found a quadratic relationship between net calcification and tissue dry mass (DM in gram), with clams of an intermediate size (about 15 g DM) showing the highest calcification. Our results show that the Red Sea giant clam T. maxima stands out among bivalves as a remarkable calcifier, displaying calcification rates comparable to other tropical photosymbiotic reef organisms such as corals.Acknowledgements: We thank Janna Leigh Randle and Felix Ivo Rossbach for assistance with field sampling and the KAUST Coastal and Marine Resources Core Lab for logistical support.Financial support: This research was funded by King Abdullah University of Science and Technology (KAUST), through baseline funding to Carlos M. Duarte, and a fellowship of the Visiting Student Research Program to Susann Rossbach
Mediterranean Red Macro Algae Mats as Habitat for High Abundances of Serpulid Polychaetes
No full textThe Mediterranean Sea harbors more than 17,000 eukaryotic marine species, with several ecosystems recognized as biodiversity hotspots, such as Posidonia oceanica meadows. Recent research indicates that benthic mats formed by the fleshy red alga Phyllophora crispa are also associated with high species richness. Among key groups found in these mats are sessile polychaetes, which live as epiphytes on the red algae thalli. Knowledge of abundance, species richness, and spatial variation of polychaetes associated with these habitats is still scarce. We carried out a comparative assessment focusing on serpulid polychaetes within samples from P. crispa mats and neighboring P. oceanica meadows at six different sampling sites around Giglio Island (Tyrrhenian Sea, Italy). A total of 17 serpulid taxa were identified. The abundance of serpulids (5665 individuals m−2 of P. crispa mat) were similar to neighboring P. oceanica meadows (2304 individuals m−2 leaves and 5890 individuals m−2 shoots). The number of serpulid taxa was significantly higher in P. crispa mats (average 6.63 ± 1.32 taxa) compared to P. oceanica beds (average 1.56 ± 0.63 and 1.84 ± 1.04 taxa in leaves and shoots, respectively). Within habitat type, there were no significant differences in species richness between sites. The most abundant species found was Josephella marenzelleri (61% of individuals), while Vermiliopsis spp. and Bathyvermilia sp. were exclusively found in P. crispa samples. Our results highlight that P. crispa mats host an exceptional diversity and that these habitats should be included in conservation strategies. Further research should focus on the significance of other important taxonomic groups within these mats and evaluate the distribution of P. crispa in different regions of the Mediterranean Sea
Collective excitations in the superdeformed well
No full textCollective excitations are commonplace features in nuclei at normal deformation. It has been suggested that both in the A\sim 190 and 150 superdeformed (SD) nuclei, collective vibrational states might occur in the same excitation energy range as quasi-particle and single-particle excitations. In particular, the large deformation associated with SD nuclei brings together orbitals from many spherical shells and leads to the close proximity of states with opposite parity, favouring octupole shape vibrations. However, to date, \sim 200 SD bands have been reported in more than 50 nuclei and in most cases, the excited SD bands have been interpreted as single or quasi-particle excitations. Only in very few cases, has the collective excitation scenario been suggested. Where are the collective states in SD nuclei? The question is particularly relevant in even--even A=190 nuclei in which SD states are observed at lower rotational frequency and hence the additional influence of the pair gap makes the collective excitations more competitive with quasi-particle excitations.F. Hannachi, A. Korichi, A.N. Wilson, A. Lopez-Martens, M. Rejmund, C. Schueck, Ch. Vieu, G. Chmel, A. Goergen, H. Huebel, D. Rossbach, S. Schoenwasser, M. Bergstroem, B.M. Nyako, J. Timar, D. Bazzacco, S. Lunardi, C. Rossi-Alvarez, P. Bednarczyk, N. Kintz, S. Naguleswaran, A. Astier, D.M. Cullen, J.F. Sharpey-Schafer, T. Lauritsen, R. Wadsworthhttp://th-www.if.uj.edu.pl/acta/vol32/abs/v32p1083.ht
Dr. Duane M. Jackson, Morehouse College, July 2011
No full textThis video is a conversation with Dr. Duane M. Jackson. Dr. Jackson talks about his paper, "Recall and the Serial Position Effect: The Role of Primacy and Recency on Accounting Students' Performance." Jackie Daniel, AUC Woodruff Library, is the interviewer
"Reflections on the subject of Emigration from Europe with a view to Settlement in the United States" By M. Carey.
No full text"Reflections on the subject of Emigration from Europe with a view to Settlement in the United States: containing bried sketches of the moral and political character of those states.
By M. Carey, member of the American philosophical, and of the American Antiquarian Society, and author of The Olive Branch, Cindiciae Hibernicae, essays on banking, on political economy, and on internal improvement.
To which are now added the English editor's comments on the subject; together with Important Advice to Emigrants, and Cautions Against Impositions Practiced in the Outports
Dispelling the Myths Behind First-author Citation Counts
No full textWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
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