1,721,169 research outputs found
Secondary aneurysmal bone cyst in fibrous dysplasia of the proximal femur.
No full textFibrous dysplasia of bone is a congenital skeletal disorder characterized by proliferation of spindle cells inside an intramedullary collagenous stroma and by formation of metaplastic bone. An aneurysmal bone cyst is a lesion of unknown etiology. Macroscopically it appears like a blood-filled cavity that expands the affected bone. Histologically, fibrous septa are bordered by macrophages, giant cells, inflammatory cells, and areas of bone production. Hemorrhagic areas can rise into fibrous dysplasia. The lesion appears as an aggressive and destructive process that is difficult to diagnose properly. A 29-year-old woman presented with a 2-year history of left inguinal and lumbar pain. She reported increased pain after physical activity. Magnetic resonance imaging of the left femur (without intravenous gadolinium) showed a mass extending 14 cm along the femoral metaphysis. This lesion involved cortical bone that was broken in the posteromedial site. Computed tomography confirmed the osteostructural lytic alteration that "blows up" the proximal femur metaphysis. A trochar biopsy allowed the diagnosis of aneurysmal bone cyst on fibrous dysplasia, excluding malignancy. The lesion was treated with curettage and local adjuvants and filled with bone grafts. Internal fixation with a sliding screw plate was also performed. Radiographs at 1 year postoperatively showed good consolidation of the grafts and absence of local recurrence. The patient achieved active and passive mobilization of the left hip with no pain. Copyright © 2009 SLACK Incorporated. All rights reserved
Unstable metaphors, uncertain minds: how metaphors shape judgments and opinions
No full textIntroduction Previous research has shown that experimentally manipulated physical states of instability negatively affect judgments and opinions. Based on this result, in the current study we want to investigate whether the processing of metaphorical expressions related to physical instability (e.g., "Our economy is shaky") and underpinned by the conceptual metaphor EMOTIONAL STABILITY IS BALANCE negatively affects participants' judgments.Methods Three hundred participants were assigned to three experimental groups. Each group was presented with sentences containing, respectively, stable metaphors, unstable metaphors or unstable literal sentences. After reading the sentences, participants were asked to respond to six topical questions regarding current and future economic and life perspectives.Results Data shows that across all six topical questions, reading stable metaphors led to more positive judgments compared to unstable sentences (both metaphors and literal ones). Moreover, in four questions out of six, reading unstable metaphorical sentences led to lower ratings compared to unstable literal sentences.Discussion These findings support the main claim of Conceptual Metaphor Theory, i.e., the idea that abstract and complex concepts are structured via metaphorical mappings from more concrete and simple ones and align with the Embodied Cognition Hypothesis. Furthermore, these findings suggest that metaphors can have a powerful influence on our perception of the world and contribute to our understanding of how metaphorical language can shape bodily experiences and attitudes
Melanin and Light
No full textMelanin is responsible, in Nature, for photoprotection, for this reason it is expected to be poorly photoreactive. However, the photo-reactivity of melanin and related materials is well documented. Here we discuss some relevant recent examples to demonstrate that, indeed, the actual mechanism of interaction of melanin with light is complex and still not completely understood. Photochemical and photothermal processes are involved, giving a contribution that strongly depends on light wavelength and intensity. Moreover, some interesting experiments demonstrated that photochemical reactivity of melanin related compounds is likely to be indirect, in the sense that the effect of light is to increase the number of radical species rather than creating photoreactive excited state. These suggestions open-up new perspectives in the interpretation of the role of melanin in photoprotection and in the design of new melanin based photoactive materials for energy conversion, environmental remediation, and nanomedicine. Further complication is given by the role of atmospheric oxygen and humidity in the photoinduced processes. Beside this complexity of behavior makes it difficult a systematic understanding of the interaction of melanin with light, it surely strongly contributes to make the properties of melanin and related materials unique
Extending photocatalysis to the visible and NIR: The molecular strategy
No full textPhotocatalysis exploits light to perform important processes as solar fuel production by water splitting, and CO2 reduction or water and air decontamination. Therefore, photocatalysis contributes to the satisfaction of the increasing needs for clean energy, environmental remediation and, most recently, sanification. Most of the efficient semiconductor nanoparticles (NP), developed as photocatalysts, work in the ultraviolet (UV) spectral region and they are not able to exploit either visible (Vis) or near infrared (NIR) radiation. This limitation makes them unable to fully exploit the broad band solar radiaton or to be applied in indoor conditions. Recently, different approaches have been developed to extend the spectral activity of semiconductor NP, like for example band-gap engineering, integration with upconversion NP and plasmonic enhancement involving also hot-electron injection. Nevertheless, the use of organic molecules and metal complexes, for enhancing the photoactivity in the Vis and NIR, was one of the first strategies proposed for sensitization and it is still one of the most efficient. In this minireview we highlight and critically discuss the most recent and relevant achievements in the field of photocatalysis obtained by exploiting dye sensitization either via dynamic or static quenching
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Survival of the implant in primary and secondary reconstruction in GMRS prostheses for the lower limb: complication, fonctional results and a comparative statistical analysis
No full textSurvival of the implant in primary and secondary reconstruction in GMRS prostheses for the lower limb: complication, fonctional results and a comparative statistical analysi
Perceptions of and Satisfaction with Sexual and Reproductive Health Interventions in Pre-Adolescent and Adolescent Students in UE/EEA Countries: A Systematic Review
Full text link: The objective of this review is to investigate perceptions of and satisfaction with sexual and reproductive health (SRH) interventions among pre-adolescents and adolescents of all genders and ethnicities in EU/EEA countries. This systematic review was conducted in accordance with PRISMA recommendations. A systematic literature search was conducted on MEDLINE (PubMed), Cochrane Central Register of Controlled Trials (Central), CINAHL (EBSCO), and PsycINFO (EBSCO) up to March 2022 to identify all published articles that included information on perceptions and levels of satisfaction with SRH interventions. The selected studies were independently and blindly evaluated for risk of bias. Finally, only five papers were included in our review, divided according to the implemented intervention design: conducted by research groups (health or non-health professionals) or structured entirely in a peer-to-peer approach. Both types of program designs analyzed in the included studies were well accepted by students, even though satisfaction assessment methods were not standardized. Peer-to-peer conducted SRH programs or interventions with practical components (e.g., exercises, discussion) were more appreciated. We also found higher levels of satisfaction among younger participants. Future SRH educational programs should consider an assessment of participants' perceptions and satisfaction, possibly adopting standardized tools. Following a peer-to-peer structure and delivering programs early could lead to greater participant satisfaction.The objective of this review is to investigate perceptions of and satisfaction with sexual and reproductive health (SRH) interventions among pre-adolescents and adolescents of all genders and ethnicities in EU/EEA countries. This systematic review was conducted in accordance with PRISMA recommendations. A systematic literature search was conducted on MEDLINE (PubMed), Cochrane Central Register of Controlled Trials (Central), CINAHL (EBSCO), and PsycINFO (EBSCO) up to March 2022 to identify all published articles that included information on perceptions and levels of satisfaction with SRH interventions. The selected studies were independently and blindly evaluated for risk of bias. Finally, only five papers were included in our review, divided according to the implemented intervention design: conducted by research groups (health or non-health professionals) or structured entirely in a peer-to-peer approach. Both types of program designs analyzed in the included studies were well accepte..
The Bodily Illusion in Adverse Conditions: Virtual Arm Ownership During Visuomotor Mismatch
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