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Seo, Myungeun,Moll, David,Silvis, Craig,Roy, Abhishek,Querelle, Sarah,Hillmyer, Marc A. American Chemical Society 2014 INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH - Vol.53 No.48
<P>Interfacial polymerization of an acid chloride-containing block polymer and a multivalent amine in the presence of a macroporous support was explored as a means to generate a nanoporous thin film composite (TFC) membrane potentially useful for ultrafiltration. When polylactide-<I>b</I>-poly(styrene-<I>co</I>-vinylbenzoyl chloride) (PLA-<I>b</I>-P(S-<I>co</I>-VBC)) in an organic phase and <I>m</I>-phenylenediamine (MPD) in an aqueous phase were used as the reactive block polymer and the amine, respectively, a block polymer thin film was successfully formed on a polysulfone support. This nanostructured film could be converted into a nanoporous layer by subsequent PLA etching under mild basic conditions. While most organic solvents used to dissolve PLA-<I>b</I>-P(S-<I>co</I>-VBC) damaged the support and decreased permeability of the resulting membrane, use of a mixture of methyl isobutyl ketone and acetonitrile produced a TFC membrane with high permeability.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/iecred/2014/iecred.2014.53.issue-48/ie5032259/production/images/medium/ie-2014-032259_0005.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/ie5032259'>ACS Electronic Supporting Info</A></P>
Interaction of carbon nanotubes with plant system: a review
Silvy Mathew,D. K. Tiwari,Dhananjay Tripathi 한국탄소학회 2021 Carbon Letters Vol.31 No.2
Recent years have witnessed remarkable development in the field of nanotechnology and it has been affirmed that carbonbased nanomaterials have wide applications in agriculture, industrial, biomedical and environmental sectors. Due to distinctive physicochemical properties of the carbon nanotubes (CNTs), they have been extensively utilized in plant science as a growth promoter, and thus, could be a boon for biomass production of agricultural products. Studies suggest that CNTs help increase the plant’s ability to absorb water and essential nutrients, thereby increasing growth. Apart from this, CNTs have been scrutinized for their utilization in genetic engineering for the delivery of genes, proteins or drugs. However, the literature discloses mixed effects of CNTs exposure on plants like in inducing oxidative stress by generating reactive oxygen species (ROS). Moreover, studies concerning CNTs interaction with plant system is at a nascent stage and needs further investigations to explore the mechanisms influencing the growth and toxicity in plants. Therefore, this review attempts to highlight the current literature on CNTs (including both single walled and multi walled) exposure on plants. It also explores unresolved challenges, as well as recommendations to ensure sustainable development of CNTs while minimizing any possible adverse health impacts.
Monica Faraoni,Belinda Crawford Camiciottoli,Silvia Ranfagni 글로벌지식마케팅경영학회 2015 Global Fashion Management Conference Vol.2015 No.06
New communication challenges for companies that use social media are: 1) the knowledge and control of the degree of alignment between communicated and perceived brand personality in order to measure the effectiveness of competitive positioning, and 2) the measurement of engagement among consumers who share comments about brands in online communities. Our research proposes research tools that can help fashion companies meet these challenges. In particular, we present an innovative methodological approach that combines netnography and text-mining to extract and analyze data from online communities of fashion brands.
Rho, Paikho,Wu, X. Ben,Smeins, Fred E.,Silvy, Nova J.,Peterson, Markus J. The Ecological Society of Korea 2015 Journal of Ecology and Environment Vol.38 No.2
A dramatic decline in the abundance of the scaled quail (Callipepla squamata) has been observed across most of its geographic range. In order to evaluate the influence of land cover patterns and their changes on scaled quail abundance, we examined landscape patterns and their changes from the 1970s to the1990s in two large ecoregions with contrasting population trends: (1) the Rolling Plains ecoregion with a significantly decreased scaled quail population and (2) the South Texas Plains ecoregion with a relatively stable scaled quail population. The National Land Cover Database (NLCD) and the U.S. Geological Survey's (USGS) Land Use/Land Cover data were used to quantify landscape patterns and their changes based on 80 randomly located $20{\times}20km^2$ windows in each of the ecoregions. We found that landscapes in the Rolling Plains and the South Texas Plains were considerably different in composition and spatial characteristics related to scaled quail habitats. The landscapes in the South Texas Plains had significantly more shrubland and less grassland-herbaceous rangeland; and except for shrublands, they were more fragmented, with greater interspersion among land cover classes. Correlation analysis between the landscape metrics and the quail-abundance-survey data showed that shrublands appeared to be more important for scaled quail in the South Texas Plains, while grassland-herbaceous rangelands and pasture-croplands were essential to scaled quail habitats in the Rolling Plains. The decrease in the amount of grassland-herbaceous rangeland and spatial aggregation of pasture-croplands has likely contributed to the population decline of scaled quails in the Rolling Plains ecoregion.
노백호,X. Ben Wu,Fred E. Smeins,Nova J. Silvy,Markus J. Peterson 한국생태학회 2015 Journal of Ecology and Environment Vol.38 No.2
A dramatic decline in the abundance of the scaled quail (Callipepla squamata) has been observed across most of its geographic range. In order to evaluate the influence of land cover patterns and their changes on scaled quail abundance, we examined landscape patterns and their changes from the 1970s to the1990s in two large ecoregions with contrasting population trends: (1) the Rolling Plains ecoregion with a significantly decreased scaled quail population and (2) the South Texas Plains ecoregion with a relatively stable scaled quail population. The National Land Cover Database (NLCD) and the U.S. Geological Survey’s (USGS) Land Use/Land Cover data were used to quantify landscape patterns and their changes based on 80 randomly located 20×20 km2 windows in each of the ecoregions. We found that landscapes in the Rolling Plains and the South Texas Plains were considerably different in composition and spatial characteristics related to scaled quail habitats. The landscapes in the South Texas Plains had significantly more shrubland and less grassland-herbaceous rangeland; and except for shrublands, they were more fragmented, with greater interspersion among land cover classes. Correlation analysis between the landscape metrics and the quail-abundance-survey data showed that shrublands appeared to be more important for scaled quail in the South Texas Plains, while grassland-herbaceous range¬lands and pasture-croplands were essential to scaled quail habitats in the Rolling Plains. The decrease in the amount of grassland-herbaceous rangeland and spatial aggregation of pasture-croplands has likely contributed to the population decline of scaled quails in the Rolling Plains ecoregion.