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| • | 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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| • | The Influence of Aprotinin and Tranexamic Acid on Platelet Function and Postoperative Blood Loss in Cardiac Surgery |
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BACKGROUND: Antifibrinolytic drugs including aprotinin and tranexamic acid are currently used in cardiac surgery to reduce postoperative bleeding and transfusion requirements, and may have different effects on platelets. We therefore evaluated platelet function after cardiopulmonary bypass (CPB) and cardiac surgery to determine the effect of either aprotinin or tranexamic acid. METHODS: In a prospective, randomized study, 50 patients scheduled for elective cardiac surgery with CPB were evaluated. Patients received high-dose aprotinin (n = 25) or tranexamic acid (n = 25) as antifibrinolytic drugs. Coagulation and platelet function were assessed preoperatively, after CPB, 3 and 24 h after surgery using modified thrombelastography and whole blood aggregometry. RESULTS: Impaired coagulation after CPB occurred in both groups compared with preoperative data (P < 0.01). In contrast to modified thrombelastography, thrombin receptor-mediated aggregometry after CPB was significantly decreased only in those patients receiving tranexamic acid until the end of the study period in comparison to the aprotinin group (P < 0.05). Aprotinin-treated patients showed significantly less chest tube drainage (575 mL ± 228 vs 1033 mL ± 647, P < 0.05) and need for postoperative transfusion requirements (P < 0.01) compared with the tranexamic acid group. CONCLUSIONS: Platelet function measured by whole blood aggregometry is better preserved by aprotinin than tranexamic acid and may be responsible for producing less bleeding within the first 24 h after CPB. |
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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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| • | filmart.com - Filmart - cameras, digital cameras, disposable wedding cameras, camera accessories, camera 35mm film, batteries, memory devices, binoculars, slr cameras, MINOLTA, OLYMPUS, FUJI, CANON, SONY, NIKON, KODAK, SAMSUNG, CANNON, VIVITAR digital cameras |
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| • | Confessions of an Alien Hunter by Seth Shostak |
Confessions of an Alien Hunter A Scientist's Search for Extraterrestrial IntelligenceeBook, 320 pages | National Geographic | Biography & Autobiography; Science - Astronomy; Biography & Autobiography - Science & Technology | $19.95 | March 17, 2009 | 978-1-4262-0433-3 (1-4262-0433-7) |
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