This work deals with the preparation of TiO nanoparticulate layers of various mass (0.05 mg/cm to 2 mg/cm) from three commercial nanopowder materials, P90, P25 and CG 300, their characterisation (profilometry, BET and SEM) and evaluation of their photocatalytic activity in the gaseous phase in a flow-through photoreactor according to the ISO standard (ISO 22197-2). Hexane was chosen as a single model pollutant and a mixture of four compounds, namely acetaldehyde, acetone, heptane and toluene was used for the evaluation of the efficiency of simultaneous removal of several pollutants.
View Article and Find Full Text PDFIncreasing plant diversity is often suggested as a way of overcoming some of the challenges faced by managers of intensive pasture systems, but it is unclear how to design the most suitable plant mixtures. Using innovative design theory, we identify two conceptual shifts that foster potentially beneficial design approaches. Firstly, reframing the goal of mixture design to supporting ecological integrity, rather than delivering lists of desired outcomes, leads to flexible design approaches that support context-specific solutions that should operate within identifiable ecological limits.
View Article and Find Full Text PDFThe objective of this study was to characterize how pediatric primary care and emergency medicine health care providers and trainees engage in injury prevention counseling and assess perceptions toward injury prevention resources. We surveyed physicians, advanced practice providers, and trainees in the Emergency Department, Primary Care Network, and Pediatric Residency Program at Children's Hospital of Philadelphia from September to November 2019. Of the 578 eligible participants, 208 (36.
View Article and Find Full Text PDFUnderstanding the response of biodiversity to management, land use and climate change is a major challenge in farmland to halt the decline of biodiversity. Farmlands shelter a wide variety of taxa, which vary in their life cycle and habitat niches. Consequently, monitoring biodiversity from sessile annual plants to migratory birds requires dedicated protocols.
View Article and Find Full Text PDFAgriculture is currently facing unprecedented challenges: ensuring food, fiber and energy production in the face of global change, maintaining the economic performance of farmers and preserving natural resources such as biodiversity and associated key ecosystem services for sustainable agriculture. Addressing these challenges requires innovative landscape scale farming systems that account for changing economic and environmental targets. These novel agricultural systems need to be recognized, accepted and promoted by all stakeholders, including local residents, and supported by public policies.
View Article and Find Full Text PDFNucleosomes are believed to carry epigenetic information through the cell cycle, including through DNA replication. It has been known for decades that parental histones are reassembled on newly replicated chromatin, but the mechanisms underlying histone inheritance and dispersal during DNA replication are not fully understood. We monitored the fate of histones H3 or H4 from a single nucleosome through DNA replication in two in vitro systems.
View Article and Find Full Text PDFSmad4 is an intracellular effector of the TGFβ family that has been implicated in Myhre syndrome, a skeletal dysplasia characterized by short stature, brachydactyly and stiff joints. The TGFβ pathway also plays a critical role in the development, organization and proliferation of the growth plate, although the exact mechanisms remain unclear. Skeletal phenotypes in Myhre syndrome overlap with processes regulated by the TGFβ pathway, including organization and proliferation of the growth plate and polarity of the chondrocyte.
View Article and Find Full Text PDFTwelve high schools in Japan (of which six are in Fukushima Prefecture), four in France, eight in Poland and two in Belarus cooperated in the measurement and comparison of individual external doses in 2014. In total 216 high-school students and teachers participated in the study. Each participant wore an electronic personal dosimeter 'D-shuttle' for two weeks, and kept a journal of his/her whereabouts and activities.
View Article and Find Full Text PDFTGFβ plays a critical role in tendon formation and healing. While its downstream effector Smad3 has been implicated in the healing process, little is known about the role of Smad3 in normal tendon development or tenocyte gene expression. Using mice deficient in Smad3 (Smad3(-/-) ), we show that Smad3 ablation disrupts tendon architecture and has a dramatic impact on normal gene and protein expression during development as well as in mature tendon.
View Article and Find Full Text PDFDuring the 1975-85 decade, health education has taken on a new dimension, particularly after the Alma-Ata conference on primary health care (PHC). The enlarged concept of PHC has contributed to the evolution of the policy of the International Union for Health Education (IUHE). The IUHE has today five main objectives: 1) assert the role of health education in the socio-economic development of communities; 2) facilitate, by organizing lectures, seminars and working groups, exchanges between those responsible for the sanitary aspects of socio-economic development; 3) take part in increasing the knowledge concerning the role of education in the promotion, protection and recovery of health; 4) ensure the international circulation of publications and research pertaining to health education; 5) develop working relations with international organizations as well as NGOs and governments.
View Article and Find Full Text PDFIn this first article dedicated to the balance of the world health, the author gives the main reasons which explain the spectacular growth of the world population. From 1950 to 1984, population increased by 93% shifting from 2.5 to 4.
View Article and Find Full Text PDFEvery day 40.000 children die throughout the world. Most of them in developing countries.
View Article and Find Full Text PDFThe health concept has recently acquired a new dimension which reflects in health education. To its fundamental objective which is the control of disease must not be added an improved quality of life. Health education must create a turn of mind in order to suppress a number of avoidable risks.
View Article and Find Full Text PDFEndocrine manifestations were absent in a patient presenting with pain in the left peri-umbilical region from a paraganglioma of the organs of Zuckerkandl. The authors describe the embryology of paragangliomas and review the published literature concerning the noradrenaline-secreting forms of these tumors. Only 86 references to those of Zuckerkandl, situated on the side of the aorta in relation to the inferior mesenteric artery, were found.
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