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Welcome to Ant LarvaPlanetology by Ellen Stofan
Planetology by Ellen Stofan
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Planetology Unlocking the Secrets of the Solar System
Written by Tom Jones and Ellen Stofan
Hardcover, 224 pages | National Geographic | Science - Astronomy; Science; Science - Earth Sciences | $35.00 | November 18, 2008 | 978-1-4262-0121-9 (1-4262-0121-4)In a stunning and completely new view of the solar system, an astronaut and a geologist team up to investigate, through parallel views made possible by cutting-edge space technology, how the earth itself can help science unravel the mysteries of the heavens.
Noted planetary geologist Ellen Stofan and veteran astronaut Tom Jones pair images of Earth—many captured by space shuttle and space station crewmembers—with astonishing scenes of alien surfaces beamed home by NASA’s far-ranging robotic probes. Vivid illustrations of searing lava plains, windswept deserts, and stark craters demonstrate how natural forces have shaped these varied landscapes. This comprehensive new portrait of the solar system brings to light an array of important features never seen until today—and it highlights, for the first time, the similarities and contrasts between Earth and its neighbors in space.
Anecdotal stories from space flights and exploratory missions make Planetology an absorbing read as well as an informative resource. The book’s unique concept draws intriguing comparisons across multiple physical processes, and its dynamic design offers a fresh approach to the study of space. With extensive media and science experience and contacts for both authors, Planetology is positioned for stellar success.
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Other Articles:
| • | More acidic oceans could profoundly affect plankton |
| Climate Change Microscopic ocean plants and animals may consume increasing amounts of carbon as oceans become more acidic, a new experiment carried out in the narrow fjords of Norway suggests. Scientists know that the world's oceans are becoming more acidic from the absorption of carbon dioxide from power plants, factories, and vehicles. Experiments have already shown that acidity could eat ... | |
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| • | Prophylactic Dexamethasone Decreases the Incidence of Sore Throat and Hoarseness After Tracheal Extubation with a Double-Lumen Endobronchial Tube |
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BACKGROUND: Postoperative sore throat and hoarseness are common complications after tracheal intubation, particularly after using a double-lumen endobronchial tube (DLT). We conducted a prospective, randomized, double-blind, placebo-controlled study to evaluate the efficacy of dexamethasone for reducing the incidence and severity of postoperative sore throat and hoarseness. METHODS: One hundred sixty-six patients (aged 18–75 yr) scheduled for thoracic surgery with a DLT were enrolled. Before induction of general anesthesia, 0.1 mg/kg dexamethasone (Group D1), 0.2 mg/kg dexamethasone (Group D2), or a placebo (Group P) were infused IV in a double-blind and prospectively randomized manner. Glottic exposure as defined by Cormack and Lehane score, resistance to DLT insertion, number of intubation attempts, time to achieve intubation, and the duration of tracheal intubation were recorded. At 1 h and 24 h after tracheal extubation, the patients were evaluated for sore throat and hoarseness using a visual analog scale (VAS; where 0 = no pain and 100 = worst pain imaginable). RESULTS: One hour after tracheal extubation, the incidence of postoperative sore throat and hoarseness, along with the severity of sore throat were lower in Group D1 (31%, P = 0.021; 11%, P = 0.003; and VAS 12.4, P < 0.001, respectively) and D2 (11%, P = 0.001; 4%, P = 0.001; and VAS 6.6, P < 0.001, respectively) compared with Group P (53%, 36% and VAS 30.9, respectively). Twenty-four hours after tracheal extubation, the incidence of postoperative sore throat, hoarseness, and the severity of sore throat were significantly lower in Group D2 (27%, P = 0.002; 15%, P = 0.001; and VAS 29.9, P < 0.002, respectively) compared with Group D1 (47%, 31%, and VAS = 43.9, respectively) and Group P (57%, 45%, and VAS = 51.3, respectively). There was no complication associated with the dexamethasone administration. CONCLUSION: The prophylactic use of 0.2 mg/kg of dexamethasone significantly decreases the incidence and severity of sore throat and hoarseness 1 h and 24 h after tracheal extubation of a DLT. |
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| • | DNA Microsatellite Analysis of Kenyan Isolates of Rhizoctonia solani from Common Bean (Phaseolus vulgaris L.) |
| Seven hundred and fifty bean plant samples with root rot symptoms were collected from farmers' fields during two surreys carried out in Embu district, Kenya. Various fungal pathogens were isolated in the laboratory from these samples; among them were 50 isolates of Rhizoctonia solani, which were subjected to pathogenicity tests in a glasshouse. Thirty-six isolates of R. solani obtained from beans with root rots were subjected to DNA microsatellite analysis. Five isolates of R. solani that cause black scarf of potatoes (Solanum tuberosum L.) were also analysed alongside those from the beans. A total of 50 alleles were detected when six microsatellite loci were typed in the 41 samples, with the mean of 8.33 and a range of 3 at locus RB23 to 19 at locus AF513014. The smallest allele size was 129 basepair at locus RE102 and the largest was 297 basepair at locus AY212027. Microsatellite analysis showed a moderate variation among the isolates from different agro-ecological zones and administrative boundaries (divisions). Phylogenetic analysis revealed 3 major clusters within the population of 41 isolates of R. solani from Kenya. Clusters 1, 2 and 3 had 15, 10 and 75% isolates, respectively. However, cluster 3 had 4 sub-clusters and cluster 1 had 2 sub-clusters, while cluster 2 did not have a sub-cluster. There was no relationship between microsatellites and geographical origin of the isolates. This is the first study on the genetic diversity of R. solani using DNA microsatellite analysis in Kenya. | |
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| • | Microscopes Metallurgical |
| Metallurgical microscopes are useful in the form of measuring instruments like thin films, surface defects, grain size, etc.Metallurgical microscopes are also used for manufacturing products like semiconductor silicon wafer, metallic grain microstructure analysis, study of metallurgy, etc. | |
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| • | Adult stem cell breakthrough |
| The first tissue-engineered trachea (windpipe), utilising the patient's own stem cells, has been successfully transplanted into a young woman with a failing airway. The bioengineered trachea immediately provided the patient with a normally functioning airway, thereby saving her life. These remarkable results provide crucial new evidence that adult stem cells, combined with biologically co... | |
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