Beyond density: mesostructural features of impact resistant wood

In this study, the impact resistance in the radial loading direction of nine tree species was studied using drop-tower testing, micro-computed tomography, and scanning electron microscopy. It was found that unlike in quasi-static conditions, density alone is a poor predictor of mechanical behavior in wood and that specific mesostructural features (interlocking grain, diffuse porous vessel distribution and intermittent rays) improved impact strength. A new, hierarchical failure of individual tracheids and the bulk fibers resembling progressive delamination of fiber-composites was observed in African mahogany, the most impact resistant tree species tested.
Source: Materials Today Communications - Category: Materials Science Source Type: research

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Publication date: Available online 14 November 2019Source: European Journal of RadiologyAuthor(s): Akira Nishiyama, Naoko Kawata, Hajime Yokota, Toshihiko Sugiura, Yosuke Matsumura, Takashi Higashide, Takuro Horikoshi, Shigeto Oda, Koichiro Tatsumi, Takashi UnoABSTRACTPurposeAcute respiratory distress syndrome (ARDS) is an acute inflammatory lung injury that frequently shows fatal outcomes. As radiographic predictive factors, some reports have focused on the region of ill-aerated lung, but none have focused on well-aerated lung. Our objective was to evaluate the relationship between computed tomography (CT) volume of the w...
Source: European Journal of Radiology - Category: Radiology Source Type: research
Abstract The application of image processing techniques for the analysis of CT scan images corresponding to lung cancer cells is gaining momentum in recent years. Therefore, it is of interest to discuss the use of a Computer-Aided Diagnosis (CAD) system using Computed Tomography (CT) images to help in the early diagnosis of lung cancer (to distinguish between benign and malignant tumors). We discuss and explore the design and significance of a CAD-CT image processed model in cancer diagnosis. PMID: 31719770 [PubMed]
Source: Bioinformation - Category: Bioinformatics Authors: Tags: Bioinformation Source Type: research
Abstract Treatment of pilon fractures remains challenging due to the difficulty of fracture reduction and associated soft tissue complications. The aim of this study was to evaluate the pitfalls and strategies of posterior column reduction in the treatment of complex tibial pilon fractures (AO/OTA 43-C3). Thirteen AO/OTA classification 43-C3 type pilon fractures treated between January 2013 and January 2016 were retrospectively analyzed. Nine cases were treated by external fixation within 26 hours (range, 6-56 hours) after injury. The definitive open reduction and internal fixation (ORIF) was performed after the w...
Source: Biomed Res - Category: Research Authors: Tags: Biomed Res Int Source Type: research
In the context of increasing availability of computed tomography (CT) scans, judicious use of ionising radiation is a priority to minimise the risk of future health problems. Hence, education of clinicians on ...
Source: BMC Health Services Research - Category: General Medicine Authors: Tags: Research article Source Type: research
ConclusionThe PET/CT-based radiomic features showed good performance in predicting EGFR mutation in non-small cell lung cancer, providing a useful method for the choice of targeted therapy in a clinical setting.
Source: European Journal of Nuclear Medicine and Molecular Imaging - Category: Nuclear Medicine Source Type: research
AbstractOsteoporosis is a metabolic bone disease with a high prevalence that affects the population worldwide, particularly the elderly. It is often due to fractures associated with bone fragility that the diagnosis of osteoporosis becomes clinically evident. However, early diagnosis would be necessary to initiate therapy and to prevent occurrence of further fractures, thus reducing morbidity and mortality. X-ray-based imaging plays a key role for fracture risk assessment and monitoring of osteoporosis. Whereas over decades dual-energy X-ray absorptiometry (DXA) has been the main method used and still reflects the referenc...
Source: Osteoporosis International - Category: Orthopaedics Source Type: research
ConclusionsOlder males who were regular alcohol drinkers were associated with intestinal anisakiasis, and often heart rate, total protein, and CRP were elevated compared to those of patients with gastric anisakiasis.
Source: Parasitology International - Category: Parasitology Source Type: research
CONCLUSIONS: The device, which combined 20 g of CELOX particles and 20 pieces of CELOX (8 g) sponge tablets with 50-mmHg intra-abdominal compression for 10 minutes, prolonged the ST by an average of 30 minutes with less BL. It was not markedly different from the full four quadrants gauze packing of liver in hemostatic effect, with no CELOX clot formation in other organs. PMID: 31711174 [PubMed - as supplied by publisher]
Source: Military Medicine - Category: International Medicine & Public Health Tags: Mil Med Source Type: research
Authors: Gulak MA, Bornais C, Shin S, Murphy L, Smylie J, Pantarotto JR, Fung-Kee-Fung M, Maziak DE Abstract Background: Patients with lung cancer often experience stressful delays throughout the diagnostic phase of care. To address that situation, our multidisciplinary team created a "Navigation Day," during which patients partake in a single-day visit that comprises nurse-led teaching, social work, smoking cessation counselling, symptom control, and dedicated test slots for integrated positron-emission tomography and computed tomography (pet/ct), pulmonary function tests (pfts), and magnetic resonance i...
Source: Current Oncology - Category: Cancer & Oncology Tags: Curr Oncol Source Type: research
ConclusionMesenteric cysts represent a rare cause of intra-abdominal mass. Owing to low prevalence, literature is limited as is guidance on management. Careful pre-operative planning is essential so as to avoid operative complications. Imaging such as USS is of great importance; however Computed Tomography (CT) and Magnetic Resonance Imaging (MRI) may be of more benefit, owing to the complex anatomical relations within which mesenteric cysts can present. Surgical excision is widely reported as the surgical treatment of choice for symptomatic cysts
Source: International Journal of Surgery Case Reports - Category: Surgery Source Type: research
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