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The quality of the girth welds on pipelines is a critical point regarding the safe operation. https://www.selleckchem.com/products/ipi-145-ink1197.html Non-contact pipeline magnetic detection (NPMD) is a non-destructive detection technology based on the metal magnetic memory (MMM) method. However, present studies mostly focus on the qualitative analysis of girth welds instead of accurate quantitative analysis of the stress status. Here, many hydraulic tests in sealed pipelines are performed to investigate the magnetic signal under different internal pressures and detection heights. A numerical model of magnetic signal is established and verified by the experimental results. The results show the characteristics of the signal that the y component has sinusoidal fluctuations when the x and z component reach the extreme values. A new parameter Kvs is proposed to comprehensively reflect the stress status of the girth welds. It is founded that the residual strength ratio (RSR) reduces from 0.97 to 0.83 when the Kvs max increases from 7500 to 13500 nT/m The magnetic signals decay exponentially in the second order when the detection height varies within 0.1-1.0 m. This study provides a theoretical and experimental basis for identifying the stress status of the girth welds on pipelines.The oral cavity represents the gateway to the complex digestive system, so the knowledge of the exact mechanisms that link them is vitally important. Recently, oral and dental pathologies have been studied as potential risk factors for pathologies linked to lifestyle habits. Therefore, it could be considered as an interesting preventive way. We conducted a narrative review with a thorough bibliographic search on MEDLINE and SCOPUS, including international studies related to oral healthcare and gastrointestinal neoplasms, published between 2015 and 2020. The primary aim of this revision is to analyze the association between oral healthcare and carcinogenic gastrointestinal processes, providing a possible future preventive strategy for dental care. Moreover, we intend to raise awareness about the importance of oral healthcare as a new paradigm and study variable in the global health care system.In current times of global change, several sources of stress such as contaminants and high temperatures may act synergistically. The extent to which organisms persist in stressful conditions will depend on the fitness consequences of multiple simultaneously acting stressors and the genetic basis of compensatory genetic responses. Ivermectin is an antiparasitic drug used in livestock that is excreted in dung of treated cattle, causing severe negative consequences on non-target fauna. We evaluated the effect of a combination of heat stress and exposure to ivermectin in the yellow dung fly, Scathophaga stercoraria (Diptera Scathophagidae). In a first experiment we investigated the effects of high rearing temperature on susceptibility to ivermectin, and in a second experiment we assayed flies from a latitudinal gradient to assess potential effects of local thermal adaptation on ivermectin sensitivity. The combination of heat and ivermectin synergistically reduced offspring survival, revealing severe effects of the two stressors when combined. However, latitudinal populations did not systematically vary in how ivermectin affected offspring survival, body size, development time, cold and heat tolerance. We also found very low narrow-sense heritability of ivermectin sensitivity, suggesting evolutionary constraints for responses to the combination of these stressors beyond immediate maternal or plastic effects. If the revealed patterns hold also for other invertebrates, the combination of increasing climate warming and ivermectin stress may thus have severe consequences for biodiversity. More generally, our study underlines the need for quantitative genetic analyses in understanding wildlife responses to interacting stressors that act synergistically and threat biodiversity. To evaluate the utility of silent magnetic resonance angiography (MRA) in the diagnosis, characterisation, and therapeutic planning of intracranial dural arteriovenous fistula (DAVF). Twenty consecutive patients with DAVF were enrolled prospectively and were evaluated using silent MRA and digital subtraction angiography (DSA) as a part of routine work-up. The diagnosis and location of fistula, Borden and Cognard classification, entire arterial feeders, and venous drainage were analysed. A therapeutic strategy was formulated, and the accessible route and vessel were predicted, which was confirmed on endovascular treatment. Silent MRA was 100% sensitive and accurate for location and classification of fistulas. Silent MRA showed a sensitivity of 82% and 76.5% for entire arterial feeders and draining veins, which improved to a sensitivity of 90% and 94% when prominent feeders and immediate venous drainage was considered. Among the missed veins, thrombosed sinus, slow sinus flow, small calibre, reduced image quality were the causes. The therapeutic decision matched with DSA in all cases and silent MRA accurately identified the potential accessible feeder in 94% cases. Silent MRA is a promising MR technique that can provide both diagnostic and therapeutic information similar to that obtained from DSA. Silent MRA is a promising MR technique that can provide both diagnostic and therapeutic information similar to that obtained from DSA. Nationally, 115,000 non-fatal firearm injuries occurred in 2017, with many such victims possessing retained bullet fragments (RBFs); however, the impact of RBFs has not been well studied. An institutional trauma database from an urban, level one trauma center was queried for patients presenting with gunshot wounds (GSWs) to the ED in 2017. GSWs were stratified by the presence or absence of RBFs. Groups were compared using t-tests, chi-squared, and logistic regression. Of 674 patients with GSWs who met inclusion criteria, 394 had RBFs versus 280 with no RBFs. Patients with RBFs were more likely admitted from the ED (57.4% vs. 41.8%, p<0.001), had significantly higher rates of return to the ED within six months (30.7% vs. 18.6%, p<0.001), and higher rates of subsequent GSW in the next year (5.1% vs. 1.8%, p=0.03). On return to ED, 17.6% of those with a RBF had symptoms associated with their RBF. RBFs may represent an unrecognized risk factor for both repeat ED visits and subsequent bullet injury. RBFs may represent an unrecognized risk factor for both repeat ED visits and subsequent bullet injury.
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