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Ultrasound-chitosan enhanced flocculation of low algal turbid waters
Sara Ann Fast,Veera Gnaneswar Gude 한국공업화학회 2015 Journal of Industrial and Engineering Chemistry Vol.24 No.-
In this study, we evaluated the effect of ultrasound-chitosan enhanced flocculation process for efficient removal of algal cells from low algal turbid waters comparing with the conventional rapid mix process. The results show that the turbidity removal efficiencies for ultrasound-enhanced coagulation (97.8–99% removal) were comparable to the conventional rapid mix coagulation (96.8–99% removal) for alum and for chitosan (84.1–90.5% for RM and 84–97% for US). This study confers that ultrasound mixing can be performed instead of conventional rapid mixing to improve the algal cell removal efficacies from the low algal turbid waters.
The Rational Optimization and Evolution of the Structural Diagonal Aesthetic in Super-Tall Towers
Besjak, Charles,Biswas, Preetam,Fast, Tobias Council on Tall Building and Urban Habitat Korea 2016 International journal of high-rise buildings Vol.5 No.4
In the design of super-tall towers, engineers often find the conventional frame systems used in countless buildings in the past decades incapable of providing the required form, performance and constructability demanded by super-tall heights. The strength of the diagrid as a structural system in high-rise towers is the total flexibility it affords the designer as an adaptable, efficient and buildable scheme. Using fundamental engineering principles combined with modern computational tools, designers can take minimum load path forms to create rationalized diagrid geometries to create optimized, highly efficient towers. The use of diagrid frames at SOM has evolved as a structural typology beginning with the large braced frames on the John Hancock Center and continued in modern applications proving to be a powerful system in meeting the demands of supertall buildings.
Experiences of Iranian Nursing Students Regarding Their Clinical Learning Environment
Ebrahim Aliafsari Mamaghani,Azad Rahmani,Hadi Hassankhani,Vahid Zamanzadeh,Suzanne Campbell,Olive Fast,Alireza Irajpour 한국간호과학회 2018 Asian Nursing Research Vol.12 No.3
Purpose: The aim of this study was to explain the experiences of Iranian nursing students regarding their clinical learning environment (CLE). Methods: Twenty-one nursing students participated in this qualitative study. Data were collected using semistructured interviews and analyzed using conventional content analysis. Results: Analysis of interviews identified six categories: educational confusion, absence of evaluation procedures, limited educational opportunities, inappropriate interactions with nursing staff, bullying culture, and discrimination. Systematic and consistent methods were not used in clinical education and evaluation of nursing students. In addition, there were inadequate interactions between nursing students and health-care staff, and most students experienced discrimination and bullying in clinical settings. Conclusion: Findings showed that the CLE of Iranian nursing students may be inadequate for high-level learning and safe and effective teaching. Addressing these challenges will require academic and practice partnerships to examine the systems affecting the CLE, and areas to be addressed are described in the six themes identified.
Arun Rajgopal,John F. Rebhun,Charlie R. Burns,Jeffrey D. Scholten,John A. Balles,David J. Fast 한국식품영양과학회 2015 Journal of medicinal food Vol.18 No.3
Lippia sidoides is an aromatic shrub that grows wild in the northeastern region of Brazil. In local traditional medicine, the aerial portions of this species are used as anti-infectives, antiseptics, spasmolytics, sedatives, hypotensives, and anti-inflammatory agents. In this research, we evaluate the potential immunological properties of Lippia extract through in vitro analysis of its ability to modulate intracellular cyclic adenosine monophosphate (cAMP) levels and interleukin-10 (IL-10) production. These results show that Lippia extract increases intracellular cAMP through the inhibition of phosphodiesterase activity. They also demonstrate that Lippia extract increases IL-10 production in THP-1 monocytes through both an increase in intracellular cAMP and the activation of p38 MAPK. These results suggest that the Lippia-mediated inhibition of phosphodiesterase activity and the subsequent increase in intracellular cAMP may explain some of the biological activities associated with L. sidoides. In addition, the anti-inflammatory activity of L. sidoides may also be due, in part, to its ability to induce IL-10 production through the inhibition of cyclic nucleotide-dependent phosphodiesterase activity and by its activation of the p38 MAPK pathway.