Search results for "sers"
showing 10 items of 478 documents
Synergistic enhancement via plasmonic nanoplate-bacteria-nanorod supercrystals for highly efficient SERS sensing of food-borne bacteria
2017
Bio-sensing techniques utilizing metallic nanoparticles as a probe have gained more and more attention and play today an important role in the detection of bacteria. To date, although several sensing materials have been tested, there is still a long way to go to achieve a fast, low-cost, ultrasensitive and multifunctional substrate suitable for a universal biosensor for detection of bacterial cells. Here, we report a novel probe design based on anisotropic plasmonic nanoparticles organized to a biocompatible 3D bio-inorganic scaffold, i.e., nanoplate-bacteria-nanorod supercrystals (NBNS) with extremely high surface-enhanced Raman spectroscopic (SERS) activity as a model of synergistic plasm…
Biblioteka akademicka wobec nowych zadań - potrzeby i preferencje użytkowników
2015
Powszechny dostęp do technologii cyfrowych, informatycznych i telekomunikacyjnych powoduje nieodwracalne zmiany w organizacji dostępu do zasobów bibliotecznych. Efektywne zarządzanie tymi zasobami wymaga prowadzenia systematycznych badań wykorzystania poszczególnych rodzajów zasobów, zauważania zmian i tendencji użytkowników oraz uwzględniania ich potrzeb w globalnej polityce uzupełniania zasobów bibliotecznych. Celem artykułu jest między innymi porównanie oferty biblioteki akademickiej w zakresie dostępu do jej zasobów, usług informacyjnych oraz dydaktycznych z potrzebami i preferencjami użytkowników w oparciu o statystyki wykorzystania zasobów tradycyjnych i elektronicznych. Analiza zosta…
The nature of black stains in Lascaux Cave, France, as revealed by surface-enhanced Raman spectroscopy
2012
We used surface-enhanced Raman spectroscopy to investigate the chemical composition of the black stains threatening the rock-art paintings of Lascaux Cave, Montignac, France. The stains are mainly composed of melanin from the fungus Ochroconis sp. and the faecal pellets of the collembolan Folsomia candida. Surface-enhanced Raman spectroscopy is a useful technique for revealing the structure of unknown macromolecules in cultural heritage research. Copyright © 2011 John Wiley & Sons, Ltd. The chemical composition of the black stains threatening the rock-art paintings of Lascaux Cave, Montignac, France was studied using surface-enhanced Raman spectroscopy (SERS). The stains are mainly composed…
Practices and Knowledge: Philosophy of Biomedicine, Governance and Citizen Participation
2018
The present chapter addresses the emergence of new forms of governance and citizen participation in the context of certain biotechnologies. On the basis of three case studies, we have mapped different models of public participation in health issues (especially health activism and Internet users, though not exclusively): identifying and analyzing actors, their mutual relationships (mainly those between "patients"/activists groups and the biomedical community), strategies and forms of participation, the exchange and circulation of "expert/lay" knowledge (and the role of the Internet in these processes), and the different activities and forms of knowledge production by "lay" citizen groups (or…
Key Drivers of Internet Banking Adoption
2008
The objective of this chapter is to provide students and managers with a holistic view into the different factors that influence online banking adoption and to use the study’s findings to develop strategies for managers on how to maximize the rate of Internet banking adoption. Research done with a sample size of 450 Spanish Internet users, has highlighted that Internet banking adoption is more likely in young, highly educated and high-income consumers. Internet affinity, online use experience and some perceived benefits are also key drivers of online financial services pur chase decision-making. Perceived financial, social and psychological risk negatively influences the use of online-banki…
Computer Vision Interaction for People with Severe Movement Restrictions
2006
In this paper we present the starting point of research in applying humancomputer interaction (HCI) techniques to help people with cerebral palsy to use computers via vision-based interaction. Our work includes the development and improvement of visionbased assistive technology, which was tested in experiments with cerebral palsy users. A brief review of current assistive technologies for severely physically impaired people and an explanation of the developed applications of such technologies are also presented. The final part of the paper describes the experimentation goals, process, and preliminary results. Future work directions are also indicated.
Initial approaches in benchmarking and round robin testing for proton exchange membrane water electrolyzers
2019
Abstract As ever-increasing amounts of renewable electricity enter the energy supply mix on a regional, national and international basis, greater emphasis is being placed on energy conversion and storage technologies to deal with the oscillations, excess and lack of electricity. Hydrogen generation via proton exchange membrane water electrolysis (PEMWE) is one technology that offers a pathway to store large amounts of electricity in the form of hydrogen. The challenges to widespread adoption of PEM water electrolyzers lie in their high capital and operating costs which both need to be reduced through R&D. An evaluation of reported PEMWE performance data in the literature reveals that there …
Molecular structures and vibrations of m-methylaniline in the S0 and S1 states studied by laser induced fluorescence spectroscopy and ab initio calcu…
2000
Abstract The UV fluorescence excitation and dispersed fluorescence spectra of a jet-cooled m-methylaniline have been obtained for the S1←S0 transition, in which some of the bands have been observed for the first time. The main spectral bands have been assigned by comparison with those of other relevant substituted benzenes. It was found that the spectra exhibit an important feature which is the internal rotation of the methyl group in the electronic ground and excited states. Ab initio calculations at MP2/6-31G* and CIS/6-31G* show that the optimized structure of m-methylaniline in the ground state is not planar with the amino group having sp3 hybridation-like character due to the existence…
In-tube solid-phase microextraction coupled by in valve mode to capillary LC-DAD: Improving detectability to multiresidue organic pollutants analysis…
2009
Abstract A simple and fast capillary chromatographic method has been developed to identify and quantify organic pollutants at sub-ppb levels in real water samples. The major groups of pesticides (organic halogens, organic phosphorous, and organic nitrogen compounds), some hydrocarbons (polycyclic aromatic hydrocarbons), phthalates and some phenols such as phenol and bisphenol A (endocrine disruptors) were included in this study. The procedure was based on coupling, in-tube solid-phase microextraction (IT-SPME) by using a conventional GC capillary column (95% methyl–5% phenyl substituted backbone, 80 cm × 0.32 mm i.d., 3 μm film thickness) in the injection valve to capillary liquid chromatog…
The primary structural photoresponse of phytochrome proteins captured by a femtosecond X-ray laser
2020
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