Zwitterionic Silica-Based Hybrid Nanoparticles for Filtration Control in Oil Drilling Conditions

2021 ◽  
Author(s):  
Tian Ao ◽  
Lili Yang ◽  
Chunlin Xie ◽  
Guancheng Jiang ◽  
Guoshuai Wang ◽  
...  
Keyword(s):  
Hybrid Nanoparticles ◽  
Oil Drilling ◽  
Drilling Conditions

California Greenin'

2019 ◽  
Author(s):  
David Vogel
Keyword(s):  
Climate Change ◽  
Gold Mining ◽  
Global Climate ◽  
Environmental Standards ◽  
Automobile Emissions ◽  
Oil Drilling ◽  
Business Interests ◽  
Environmental Deterioration ◽  
Natural Beauty ◽  
Wilderness Areas

Over the course of its 150-year history, California has successfully protected its scenic wilderness areas, restricted coastal oil drilling, regulated automobile emissions, preserved coastal access, improved energy efficiency, and, most recently, addressed global climate change. How has this state, more than any other, enacted so many innovative and stringent environmental regulations over such a long period of time? This book shows why the Golden State has been at the forefront in setting new environmental standards, often leading the rest of the nation. From the establishment of Yosemite, America's first protected wilderness, and the prohibition of dumping gold-mining debris in the nineteenth century to sweeping climate-change legislation in the twenty-first, the book traces California's remarkable environmental policy trajectory. It explains that this pathbreaking role developed because California had more to lose from environmental deterioration and more to gain from preserving its stunning natural geography. As a result, citizens and civic groups effectively mobilized to protect and restore their state's natural beauty and, importantly, were often backed both by business interests and by strong regulatory authorities. Business support for environmental regulation in California reveals that strict standards are not only compatible with economic growth but can also contribute to it. The book also examines areas where California has fallen short, particularly in water management and the state's dependence on automobile transportation.

Offshore Oil Drilling

2018 ◽  
Vol 056 (04) ◽  
Author(s):  
Sumer Seiki
Keyword(s):  
Oil Drilling ◽  
Offshore Oil

Understanding the Costs and Benefits of Deepwater Oil Drilling Regulation

2011 ◽  
Author(s):  
Alan Krupnick ◽  
Sarah E. Campbell ◽  
Mark A. Cohen ◽  
Ian W. H. Parry
Keyword(s):  
Costs And Benefits ◽  
Oil Drilling

Who Speaks for Nature?

2019 ◽  
Author(s):  
Todd A. Eisenstadt ◽  
Karleen Jones West
Keyword(s):  
Ethnic Groups ◽  
Environmental Degradation ◽  
Oil Spills ◽  
Environmental Attitudes ◽  
Nationwide Survey ◽  
Well Being ◽  
Early Theory ◽  
Oil Drilling ◽  
Indigenous Worldviews ◽  
Individual Vulnerability

Parting from conventional social science arguments that people speak for the ethnic groups they represent or for social or class-based groups, this study argues that attitudes of Ecuador’s Amazon citizens are shaped by environmental vulnerability, and specifically exposure to environmental degradation. Using results of a nationwide survey to demonstrate that vulnerability matters in determining environmental attitudes of respondents, the authors argue that groups might have more success mobilizing on behalf of the environment through geographically based “polycentric rights,” rather than through more traditional and ethnically bound multicultural rights. This book offers among the first methodological bridges between scholarship considering social movements, and predominantly ethnic groups, as primary agents of environmental change in Latin America and those emphasizing the agency of individuals. The authors conduct a nationwide survey to glean respondent positions on a range of environmental issues, then contextualize these findings through scores of in-depth interviews with indigenous, environmental, government, academic, and civil society leaders throughout Ecuador between 2014 and 2017. They find that some abstract issues—like indigenous worldviews—affect peoples’ attitudes, but that concrete experiences—such as that of living in areas of environmental degradation due to oil drilling—is a more important conditioner of environmental attitudes. The authors qualify post-materialism, an early theory of environmentalism, which argues that material well-being makes citizens more protective of the environment. The book concludes that post-materialism must be tempered by individual vulnerability, and that group activism is more successful where people have not yet been adversely impacted by environmental degradation such as oil spills and forest destruction.

Lipid-polymer hybrid nanoparticles: Synthesis strategies and biomedical applications

2019 ◽  
Vol 160 ◽  
pp. 130-142 ◽  
Author(s):  
Vivek Dave ◽  
Kajal Tak ◽  
Amit Sohgaura ◽  
Ashish Gupta ◽  
Veera Sadhu ◽  
...  
Keyword(s):  
Biomedical Applications ◽  
Hybrid Nanoparticles ◽  
Polymer Hybrid ◽  
Nanoparticles Synthesis

scholarly journals Hybrid Biopolymer and Lipid Nanoparticles with Improved Transfection Efficacy for mRNA

Cells ◽  
2020 ◽  
Vol 9 (9) ◽  
pp. 2034 ◽  
Author(s):  
Christian D. Siewert ◽  
Heinrich Haas ◽  
Vera Cornet ◽  
Sara S. Nogueira ◽  
Thomas Nawroth ◽  
...  
Keyword(s):  
Small Angle ◽  
Messenger Rna ◽  
Physicochemical Characterization ◽  
Single Step ◽  
Model Systems ◽  
Molecular Organization ◽  
Hybrid Nanoparticles ◽  
Polymer Mixture ◽  
Internal Organization ◽  
Transfection Efficacy

Hybrid nanoparticles from lipidic and polymeric components were assembled to serve as vehicles for the transfection of messenger RNA (mRNA) using different portions of the cationic lipid DOTAP (1,2-Dioleoyl-3-trimethylammonium-propane) and the cationic biopolymer protamine as model systems. Two different sequential assembly approaches in comparison with a direct single-step protocol were applied, and molecular organization in correlation with biological activity of the resulting nanoparticle systems was investigated. Differences in the structure of the nanoparticles were revealed by thorough physicochemical characterization including small angle neutron scattering (SANS), small angle X-ray scattering (SAXS), and cryogenic transmission electron microscopy (cryo-TEM). All hybrid systems, combining lipid and polymer, displayed significantly increased transfection in comparison to lipid/mRNA and polymer/mRNA particles alone. For the hybrid nanoparticles, characteristic differences regarding the internal organization, release characteristics, and activity were determined depending on the assembly route. The systems with the highest transfection efficacy were characterized by a heterogenous internal organization, accompanied by facilitated release. Such a system could be best obtained by the single step protocol, starting with a lipid and polymer mixture for nanoparticle formation.

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