1,733,591 research outputs found
Synthesis of Organic–Inorganic Nanohybrids-Based Polymeric Nanocomposites
No full textOrganic–inorganic nanohybrids-based polymer nanocomposites are made up of two different components, and these hybrids attained great attention over last decades due to their diversified framework and fascinating features. These nanohybrids possess synergistic characteristics of both organic and inorganic substances. Different synthetic routes are used to synthesize these materials with enhanced morphology, tunable features, and fine nanostructures. This chapter focuses on various synthetic routes for fabrication of organic–inorganic-based nanopolymeric composites. Synthetic strategies and protocols of different routes have been described in details. We have also discussed the advantages and limitations of all synthetic methods in details.Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.Aerospace Manufacturing Technologie
Strategies for sequential design of experiments
Get PDFThesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1994.Includes bibliographical references (p. 159-169).by Rizwan R. Koita.M.S
Comparison of direct–indirect emissions of conventional and advanced technologies in European aviation
No full textThis research aims to investigate and compare new and existing technologies and their impact on overall emissions during climb, cruise, and descent (CCD). The data is obtained from the International Civil Aviation Organization (ICAO) and the European Environmental Agency related to fuel flow rates, types of aircraft and engines, and emission factors. Based on the data obtained, the nitrogen oxide (NOx), carbon monoxide (CO), and hydrocarbon (HC) emissions of each aircraft are carefully analyzed to estimate accurately their impact on the environment. The developed fuel flow model considers various factors to estimate the fuel consumption of selected aircraft and provide a comprehensive understanding of the environmental influence of each aircraft. The findings of the study reveal that in scope 1, traditional aircraft generate 27% higher emissions than biofuel-powered (100% blend with Jet-A1 fuel) aircraft, and this disparity increases to 31.4% when compared to hybrid electric aircraft. The analysis shows that electric aircraft emissions are 85.1% lower than conventional aircraft. Furthermore, it is estimated that in the majority of instances involving the chosen aircraft, the levels of NOx emissions are consistently greater in comparison to HC. Further, this study offers valuable insights to policymakers and regulators in their efforts to develop more effective emission regulations and incentives for the aviation industry, particularly concerning CCD emissions. It also provides a comparison of the top 10 European airports that are responsible for the highest emissions in Europe based on the data provided by OAG. In general, the results of this study possess the capacity to stimulate innovation and facilitate the advancement of environmentally friendly aircraft technology within Europe. © The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature 2025
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Islamic Responses to Western Science and Technology
No full textRizwan Zamir is a doctoral candidate in Religious Studies at the University of VirginiaThomas Jefferson Center for the Study of Core Texts and Idea
The role of β-Hydroxy-β-methyl butyrate (HMB) in glioma growth suppression in mice
Get PDFGlioblastoma (GBM) represents one of the most aggressive malignancies of the central nervous
system (CNS), characterized by limited therapeutic options and high recurrence rate. One of the
factors contributing to the poor prognosis of glioblastoma is its highly invasive nature, which enables
glioblastoma cells to migrate and infiltrate adjacent healthy brain tissues. This diffuse infiltration
complicates efforts to achieve complete surgical resection, thereby limiting the effectiveness of
surgical interventions and contributing to the tumor's recurrence and resistance to treatment. This
invasive behavior is driven by a complex interplay of genetic, molecular, and environmental factors
that regulate cytoskeletal dynamics, cell adhesion, and extracellular matrix degradation. Previous
studies reveal that the gut microbiota plays a significant role in glioblastoma progression through the
modulation of neurotransmitters and immune responses, and also gut microbiome can influence the
growth of gliomas by altering the composition of microbes and metabolites, impacting tumor
development. Previously we have shown that gut microbiota plays an important role in the gut-brain
axis both in physiological and glioma conditions. Here we show that in the presence of glioma, fecal
metabolite β-hydroxy-β-methylbutyrate (HMB) was significantly reduced compared to the same mice
before tumor cell inoculation. Of note, HMB administration reduces tumor growth and proliferation
in carcinoma cells. To understand whether HMB could be effective also against glioma cells, we first
demonstrated in vitro that HMB directly inhibits proliferation in both mouse and human glioblastoma
cell lines and inhibits glioma cell basal cell migration and FBS-induced invasion. In in vivo studies,
oral gavage of HMB to glioma-bearing mice resulted in a significant reduction in tumour volume
compared to control mice, suggesting that this leucine metabolite, which is produced in the gut, may
have an anti-tumour role in glioma
Bending fatigue and creep of tough matrix laminates
Get PDFThesis (M.S.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 1994.Includes bibliographical references (leaves 151-153).by Rizwan Mahmood Gul.M.S
Technology of cement production : issues and options for developing countries
Get PDFThesis (M.S.)--Massachusetts Institute of Technology, Dept. of Civil Engineering, 1986.MICROFICHE COPY AVAILABLE IN ARCHIVES AND ENGINEERINGBibliography: leaves 253-256.by Rizwan Ibrahim.M.S
Revival of a favourable Afghanistan? : Security relations between Pakistan and Afghanistan beyond 2021
No full textAlamuddin Rizwan, Rajab Taieb and Maryam Jam
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